diff --git a/Makefile b/Makefile
index 00c6234..d20b5cb 100644
--- a/Makefile
+++ b/Makefile
@@ -1,11 +1,11 @@
-CC=gcc
-CFLAGS:=-ggdb
-LDLIBS=-I ${CHDRD} $$(pkg-config --libs ncurses readline)
+# CC=gcc
+CFLAGS:=-Wall -Wextra -Wpedantic -ggdb $(shell pkg-config --cflags ncurses readline)
+LDLIBS=-I ${CHDRD} $(shell pkg-config --libs ncurses readline)
 LEX:=flex
 
 LEXD:=src/
 LEXF:=$(shell find ${LEXD} -iname '*.l')
-GENLEX:=$(subst .l,.c,${LEXF}) 
+GENLEX:=$(subst .l,.c,${LEXF})
 
 SRCD:=src/
 OBJD:=obj/
@@ -20,7 +20,7 @@ CHDR:=$(addsuffix .gch,$(subst ${HDRD},${CHDRD},${HDR}))
 OUTPUT:=csope
 
 main: ${CHDR} ${OBJ}
-	${LINK.c} ${LDLIBS} ${OBJ} -o ${OUTPUT} 
+	${LINK.c} ${OBJ} -o ${OUTPUT} ${LDLIBS}
 
 obj/%.o: src/%.c
 	${COMPILE.c} $< -o $@
diff --git a/src/basename.c b/src/basename.c
index 518fa35..3294b8d 100644
--- a/src/basename.c
+++ b/src/basename.c
@@ -17,11 +17,11 @@
  without specific prior written permission.
 
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
- IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT falseT LIMITED TO,
  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
+ PURPOSE ARE DISCLAIMED. IN false EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ CONSEQUENTIAL DAMAGES (INCLUDING, BUT falseT LIMITED TO, PROCUREMENT OF
  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  INTERRUPTION)
  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
diff --git a/src/build.c b/src/build.c
index 48f0c34..6aa7bdd 100644
--- a/src/build.c
+++ b/src/build.c
@@ -17,11 +17,11 @@
  without specific prior written permission.
 
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
- IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT falseT LIMITED TO,
  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
+ PURPOSE ARE DISCLAIMED. IN false EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ CONSEQUENTIAL DAMAGES (INCLUDING, BUT falseT LIMITED TO, PROCUREMENT OF
  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  INTERRUPTION)
  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
@@ -54,9 +54,9 @@
 
 /* Exported variables: */
 
-BOOL    buildonly = NO;    	/* only build the database */
-BOOL    unconditional = NO;    /* unconditionally build database */
-BOOL    fileschanged;    	/* assume some files changed */
+bool    buildonly = false;    	/* only build the database */
+bool    unconditional = false;    /* unconditionally build database */
+bool    fileschanged;    	/* assume some files changed */
 
 /* variable copies of the master strings... */
 char    invname_buf[] = INVNAME;
@@ -90,7 +90,7 @@ static    void    movefile(char *new, char *old);
 static    void    putheader(char *dir);
 static    void    fetch_include_from_dbase(char *, size_t);
 static    void    putlist(char **names, int count);
-static    BOOL    samelist(FILE *oldrefs, char **names, int count);
+static    bool    samelist(FILE *oldrefs, char **names, int count);
 
 
 /* Error handling routine if inverted index creation fails */
@@ -99,8 +99,8 @@ cannotindex(void)
 {
     fprintf(stderr, "\
 cscope: cannot create inverted index; ignoring -q option\n");
-    invertedindex = NO;
-    errorsfound = YES;
+    invertedindex = false;
+    errorsfound = true;
     fprintf(stderr, "\
 cscope: removed files %s and %s\n",
         newinvname, newinvpost);
@@ -110,7 +110,7 @@ cscope: removed files %s and %s\n",
 
 
 /* see if the name list is the same in the cross-reference file */
-static BOOL
+static bool
 samelist(FILE *oldrefs, char **names, int count)
 {
     char    oldname[PATHLEN + 1];   /* name in old cross-reference */
@@ -120,16 +120,16 @@ samelist(FILE *oldrefs, char **names, int count)
     /* see if the number of names is the same */
     if (fscanf(oldrefs, "%d", &oldcount) != 1 ||
     oldcount != count) {
-    return(NO);
+    return(false);
     }
     /* see if the name list is the same */
     for (i = 0; i < count; ++i) {
     if ((1 != fscanf(oldrefs," %[^\n]",oldname)) ||
         strnotequal(oldname, names[i])) {
-        return(NO);
+        return(false);
     }
     }
-    return(YES);
+    return(true);
 }
 
 
@@ -167,10 +167,10 @@ opendatabase(void)
     blocknumber = -1;    /* force next seek to read the first block */
 
     /* open any inverted index */
-    if (invertedindex == YES &&
+    if (invertedindex == true &&
     invopen(&invcontrol, invname, invpost, INVAVAIL) == -1) {
     askforreturn();    	/* so user sees message */
-    invertedindex = NO;
+    invertedindex = false;
     }
 }
 
@@ -180,7 +180,7 @@ void
 rebuild(void)
 {
     close(symrefs);
-    if (invertedindex == YES) {
+    if (invertedindex == true) {
     invclose(&invcontrol);
     nsrcoffset = 0;
     npostings = 0;
@@ -215,7 +215,7 @@ build(void)
     int     built = 0;        /* built crossref for these files */
     int     copied = 0;        /* copied crossref for these files */
     unsigned long fileindex;        /* source file name index */
-    BOOL    interactive = YES;    /* output progress messages */
+    bool    interactive = true;    /* output progress messages */
 
     /* normalize the current directory relative to the home directory so
        the cross-reference is not rebuilt when the user's login is moved */
@@ -231,7 +231,7 @@ build(void)
     /* if there is an old cross-reference and its current directory matches */
     /* or this is an unconditional build */
     if ((oldrefs = vpfopen(reffile, "rb")) != NULL
-    && unconditional == NO
+    && unconditional == false
     && fscanf(oldrefs, "cscope %d %" PATHLEN_STR "s", &fileversion, olddir) == 2
     && (strcmp(olddir, currentdir) == 0 /* remain compatible */
         || strcmp(olddir, newdir) == 0)) {
@@ -239,9 +239,9 @@ build(void)
     fstat(fileno(oldrefs), &statstruct);
     reftime = statstruct.st_mtime;
     if (fileversion >= 8) {
-        BOOL    oldcompress = YES;
-        BOOL    oldinvertedindex = NO;
-        BOOL    oldtruncate = NO;
+        bool    oldcompress = true;
+        bool    oldinvertedindex = false;
+        bool    oldtruncate = false;
         int    c;
 
         /* see if there are options in the database */
@@ -254,14 +254,14 @@ build(void)
         }
         switch (getc(oldrefs)) {
         case 'c':	/* ASCII characters only */
-            oldcompress = NO;
+            oldcompress = false;
             break;
         case 'q':	/* quick search */
-            oldinvertedindex = YES;
+            oldinvertedindex = true;
             fscanf(oldrefs, "%ld", &totalterms);
             break;
         case 'T':	/* truncate symbols to 8 characters */
-            oldtruncate = YES;
+            oldtruncate = true;
             break;
         }
         }
@@ -274,7 +274,7 @@ cscope: -c or -T option mismatch between command line and old symbol database\n"
         if (oldinvertedindex != invertedindex) {
         posterr("\
 cscope: -q option mismatch between command line and old symbol database\n");
-        if (invertedindex == NO) {
+        if (invertedindex == false) {
             posterr("cscope: removed files %s and %s\n",
         	    invname, invpost);
             unlink(invname);
@@ -290,12 +290,12 @@ cscope: -q option mismatch between command line and old symbol database\n");
         }
     }
     /* if assuming that some files have changed */
-    if (fileschanged == YES) {
+    if (fileschanged == true) {
         goto outofdate;
     }
     /* see if the directory lists are the same */
-    if (samelist(oldrefs, srcdirs, nsrcdirs) == NO
-        || samelist(oldrefs, incdirs, nincdirs) == NO
+    if (samelist(oldrefs, srcdirs, nsrcdirs) == false
+        || samelist(oldrefs, incdirs, nincdirs) == false
         /* get the old number of files */
         || fscanf(oldrefs, "%lu", &oldnum) != 1
         /* skip the string space size */
@@ -331,7 +331,7 @@ cscope: converting to new symbol database file format\n");
     /* reopen the old cross-reference file for fast scanning */
     if ((symrefs = vpopen(reffile, O_BINARY | O_RDONLY)) == -1) {
         postfatal("cscope: cannot open file %s\n", reffile);
-        /* NOTREACHED */
+        /* falseTREACHED */
     }
     /* get the first file name in the old cross-reference */
     blocknumber = -1;
@@ -346,16 +346,16 @@ cscope: converting to new symbol database file format\n");
     /* open the new cross-reference file */
     if ((newrefs = myfopen(newreffile, "wb")) == NULL) {
     postfatal("cscope: cannot open file %s\n", reffile);
-    /* NOTREACHED */
+    /* falseTREACHED */
     }
-    if (invertedindex == YES && (postings = myfopen(temp1, "wb")) == NULL) {
+    if (invertedindex == true && (postings = myfopen(temp1, "wb")) == NULL) {
     cannotwrite(temp1);
     cannotindex();
     }
     putheader(newdir);
     fileversion = FILEVERSION;
-    if (buildonly == YES && verbosemode != YES && !isatty(0)) {
-    interactive = NO;
+    if (buildonly == true && verbosemode != true && !isatty(0)) {
+    interactive = false;
     } else {
     searchcount = 0;
     }
@@ -366,20 +366,20 @@ cscope: converting to new symbol database file format\n");
        included files is processed */
     firstfile = 0;
     lastfile = nsrcfiles;
-    if (invertedindex == YES) {
+    if (invertedindex == true) {
     srcoffset = malloc((nsrcfiles + 1u) * sizeof(*srcoffset));
     }
     for (;;) {
     progress("Building symbol database", (long)built,
          (long)lastfile);
-    if (linemode == NO)
+    if (linemode == false)
         refresh();
 
     /* get the next source file name */
     for (fileindex = firstfile; fileindex < lastfile; ++fileindex) {
 
         /* display the progress about every three seconds */
-        if (interactive == YES && fileindex % 10 == 0) {
+        if (interactive == true && fileindex % 10 == 0) {
         progress("Building symbol database", fileindex, lastfile);
         }
         /* if the old file has been deleted get the next one */
@@ -406,7 +406,7 @@ cscope: converting to new symbol database file format\n");
         } else {
         /* copy its cross-reference */
         putfilename(file);
-        if (invertedindex == YES) {
+        if (invertedindex == true) {
             copyinverted();
         } else {
             copydata();
@@ -421,7 +421,7 @@ cscope: converting to new symbol database file format\n");
     }
     firstfile = lastfile;
     lastfile = nsrcfiles;
-    if (invertedindex == YES) {
+    if (invertedindex == true) {
         srcoffset = realloc(srcoffset, (nsrcfiles + 1) * sizeof(*srcoffset));
     }
     /* sort the included file names */
@@ -441,16 +441,16 @@ cscope: converting to new symbol database file format\n");
     if (fflush(newrefs) == EOF) {
     /* rewind doesn't check for write failure */
     cannotwrite(newreffile);
-    /* NOTREACHED */
+    /* falseTREACHED */
     }
 
     /* create the inverted index if requested */
-    if (invertedindex == YES) {
+    if (invertedindex == true) {
     char    sortcommand[PATHLEN + 1];
 
     if (fflush(postings) == EOF) {
         cannotwrite(temp1);
-        /* NOTREACHED */
+        /* falseTREACHED */
     }
     fstat(fileno(postings), &statstruct);
     fclose(postings);
@@ -504,11 +504,11 @@ seek_to_trailer(FILE *f)
 {
     if (fscanf(f, "%ld", &traileroffset) != 1) {
     postfatal("cscope: cannot read trailer offset from file %s\n", reffile);
-    /* NOTREACHED */
+    /* falseTREACHED */
     }
     if (fseek(f, traileroffset, SEEK_SET) == -1) {
     postfatal("cscope: cannot seek to trailer in file %s\n", reffile);
-    /* NOTREACHED */
+    /* falseTREACHED */
     }
 }
 
@@ -550,10 +550,10 @@ static void
 putheader(char *dir)
 {
     dboffset = fprintf(newrefs, "cscope %d %s", FILEVERSION, dir);
-    if (compress == NO) {
+    if (compress == false) {
     dboffset += fprintf(newrefs, " -c");
     }
-    if (invertedindex == YES) {
+    if (invertedindex == true) {
     dboffset += fprintf(newrefs, " -q %.10ld", totalterms);
     } else {
     /* leave space so if the header is overwritten without -q
@@ -561,7 +561,7 @@ putheader(char *dir)
      * is the same length */
     dboffset += fprintf(newrefs, "              ");
     }
-    if (trun_syms == YES) {
+    if (trun_syms == true) {
     dboffset += fprintf(newrefs, " -T");
     }
 
@@ -591,7 +591,7 @@ putlist(char **names, int count)
     if (fputs(names[i], newrefs) == EOF ||
         putc('\n', newrefs) == EOF) {
         cannotwrite(newreffile);
-        /* NOTREACHED */
+        /* falseTREACHED */
     }
     }
 }
@@ -721,7 +721,7 @@ movefile(char *new, char *old)
     myperror("cscope");
     postfatal("cscope: cannot rename file %s to file %s\n",
           new, old);
-    /* NOTREACHED */
+    /* falseTREACHED */
     }
 }
 
diff --git a/src/build.h b/src/build.h
index 2a2adb1..419034d 100644
--- a/src/build.h
+++ b/src/build.h
@@ -17,11 +17,11 @@
  without specific prior written permission.
 
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
- IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT falseT LIMITED TO,
  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
+ PURPOSE ARE DISCLAIMED. IN false EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ CONSEQUENTIAL DAMAGES (INCLUDING, BUT falseT LIMITED TO, PROCUREMENT OF
  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  INTERRUPTION)
  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
@@ -44,9 +44,9 @@
 
 /* declarations for globals defined in build.c */
 
-extern    BOOL    buildonly;	/* only build the database */
-extern    BOOL    unconditional;	/* unconditionally build database */
-extern    BOOL    fileschanged;	/* assume some files changed */
+extern    bool    buildonly;	/* only build the database */
+extern    bool    unconditional;	/* unconditionally build database */
+extern    bool    fileschanged;	/* assume some files changed */
 
 extern    char    *reffile;	/* cross-reference file path name */
 extern    char    *invname; 	/* inverted index to the database */
diff --git a/src/command.c b/src/command.c
index 50dd0a9..7d8a54b 100644
--- a/src/command.c
+++ b/src/command.c
@@ -17,11 +17,11 @@
  without specific prior written permission.
 
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
- IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT falseT LIMITED TO,
  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
+ PURPOSE ARE DISCLAIMED. IN false EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ CONSEQUENTIAL DAMAGES (INCLUDING, BUT falseT LIMITED TO, PROCUREMENT OF
  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  INTERRUPTION)
  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
@@ -59,9 +59,9 @@ extern const void const* wmode;
 extern const void const* wresult;
 extern const void const* const* current_window;
 
-BOOL    caseless;    	/* ignore letter case when searching */
-BOOL    *change;    	/* change this line */
-BOOL    changing;    	/* changing text */
+bool    caseless;    	/* ignore letter case when searching */
+bool    *change;    	/* change this line */
+bool    changing;    	/* changing text */
 char    newpat[PATLEN + 1];    /* new pattern */
 
 /* Internal prototypes: */
@@ -80,7 +80,7 @@ clearprompt(void)
 
 /* read references from a file */
 
-BOOL
+bool
 readrefs(char *filename)
 {
     FILE    *file;
@@ -88,16 +88,16 @@ readrefs(char *filename)
 
     if ((file = myfopen(filename, "rb")) == NULL) {
         cannotopen(filename);
-        return(NO);
+        return(false);
     }
     if ((c = getc(file)) == EOF) {    /* if file is empty */
         fclose(file);
-        return(NO);
+        return(false);
     }
     totallines = 0;
     disprefs = 0;
     nextline = 1;
-    if (writerefsfound() == YES) {
+    if (writerefsfound() == true) {
         putc(c, refsfound);
         while ((c = getc(file)) != EOF) {
         	putc(c, refsfound);
@@ -106,12 +106,12 @@ readrefs(char *filename)
         fclose(refsfound);
         if ( (refsfound = myfopen(temp1, "rb")) == NULL) {
         	cannotopen(temp1);
-        	return(NO);
+        	return(false);
         }
         countrefs();
     } else
         fclose(file);
-    return(YES);
+    return(true);
 }
 
 /* mark/unmark this displayed line to be changed */
@@ -124,11 +124,11 @@ mark(unsigned int i)
     if (j < totallines) {
     move(displine[i], 1);
 
-    if (change[j] == NO) {
-        change[j] = YES;
+    if (change[j] == false) {
+        change[j] = true;
         addch('>');
     } else {
-        change[j] = NO;
+        change[j] = false;
         addch(' ');
     }
     }
@@ -188,7 +188,7 @@ countrefs(void)
     /* count the references found and find the length of the file,
        function, and line number display fields */
 
-    /* HBB NOTE 2012-04-07: it may look like we shouldn't assing tempstring here,
+    /* HBB falseTE 2012-04-07: it may look like we shouldn't assing tempstring here,
      * since it's not used.  But it has to be assigned just so the return value
      * of fscanf will actually reach 4. */
     while (EOF != (i = fscanf(refsfound,
@@ -210,7 +210,7 @@ countrefs(void)
     if ((i = strlen(pathcomponents(file, dispcomponents))) > filelen) {
         filelen = i;
     }
-    if (ogs == YES) {
+    if (ogs == true) {
         ogsnames(file, &subsystem, &book);
         if ((i = strlen(subsystem)) > subsystemlen) {
         subsystemlen = i;
@@ -232,7 +232,7 @@ countrefs(void)
     /* restrict the width of displayed columns */
     /* HBB FIXME 20060419: magic number alert! */
     i = (COLS - 5) / 3;
-    if (ogs == YES) {
+    if (ogs == true) {
     i = (COLS - 7) / 5;
     }
     if (filelen > i && i > 4) {
diff --git a/src/compath.c b/src/compath.c
index 853874e..c8704ef 100644
--- a/src/compath.c
+++ b/src/compath.c
@@ -17,11 +17,11 @@
  without specific prior written permission.
 
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
- IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT falseT LIMITED TO,
  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
+ PURPOSE ARE DISCLAIMED. IN false EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ CONSEQUENTIAL DAMAGES (INCLUDING, BUT falseT LIMITED TO, PROCUREMENT OF
  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  INTERRUPTION)
  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
diff --git a/src/constants.h b/src/constants.h
index e15bfac..d85e6ae 100644
--- a/src/constants.h
+++ b/src/constants.h
@@ -17,11 +17,11 @@
  without specific prior written permission.
 
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
- IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT falseT LIMITED TO,
  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
+ PURPOSE ARE DISCLAIMED. IN false EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ CONSEQUENTIAL DAMAGES (INCLUDING, BUT falseT LIMITED TO, PROCUREMENT OF
  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  INTERRUPTION)
  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
diff --git a/src/crossref.c b/src/crossref.c
index 1b09245..35b397c 100644
--- a/src/crossref.c
+++ b/src/crossref.c
@@ -17,11 +17,11 @@
  without specific prior written permission.
 
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
- IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT falseT LIMITED TO,
  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
+ PURPOSE ARE DISCLAIMED. IN false EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ CONSEQUENTIAL DAMAGES (INCLUDING, BUT falseT LIMITED TO, PROCUREMENT OF
  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  INTERRUPTION)
  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
@@ -64,7 +64,7 @@ do {                                       \
 #define    SYMBOLINC    20	/* symbol list size increment */
 
 long    dboffset;    	/* new database offset */
-BOOL    errorsfound;    	/* prompt before clearing messages */
+bool    errorsfound;    	/* prompt before clearing messages */
 long    lineoffset;    	/* source line database offset */
 long    npostings;    	/* number of postings */
 int    nsrcoffset;             /* number of file name database offsets */
@@ -100,7 +100,7 @@ crossref(char *srcfile)
     if (! ((stat(srcfile, &st) == 0)
        && S_ISREG(st.st_mode))) {
     cannotopen(srcfile);
-    errorsfound = YES;
+    errorsfound = true;
     return;
     }
 
@@ -108,7 +108,7 @@ crossref(char *srcfile)
     /* open the source file */
     if ((yyin = myfopen(srcfile, "r")) == NULL) {
     cannotopen(srcfile);
-    errorsfound = YES;
+    errorsfound = true;
     return;
     }
     filename = srcfile;    /* save the file name for warning messages */
@@ -130,7 +130,7 @@ crossref(char *srcfile)
     default:
         /* if requested, truncate C symbols */
         length = last - first;
-        if (trun_syms == YES && length > 8 &&
+        if (trun_syms == true && length > 8 &&
         token != INCLUDE && token != NEWFILE) {
         length = 8;
         last = first + 8;
@@ -220,10 +220,10 @@ putfilename(char *srcfile)
     /* note: dbputc is not used to avoid lint complaint */
     if (putc(NEWFILE, newrefs) == EOF) {
         cannotwrite(newreffile);
-        /* NOTREACHED */
+        /* falseTREACHED */
     }
     ++dboffset;
-    if (invertedindex == YES) {
+    if (invertedindex == true) {
         srcoffset[nsrcoffset++] = dboffset;
     }
     dbfputs(srcfile);
@@ -237,7 +237,7 @@ putcrossref(void)
 {
     unsigned int i, j;
     unsigned char c;
-    BOOL    blank;          /* blank indicator */
+    bool    blank;          /* blank indicator */
     unsigned int symput = 0;     /* symbols output */
     int     type;
 
@@ -251,18 +251,18 @@ putcrossref(void)
     /* HBB 20010425: added this line: */
     my_yytext[my_yyleng] = '\0';
 
-    blank = NO;
+    blank = false;
     for (i = 0; i < my_yyleng; ++i) {
 
     /* change a tab to a blank and compress blanks */
     if ((c = my_yytext[i]) == ' ' || c == '\t') {
-        blank = YES;
+        blank = true;
     } else if (symput < symbols && i == symbol[symput].first) {
         /* look for the start of a symbol */
 
         /* check for compressed blanks */
-        if (blank == YES) {
-        blank = NO;
+        if (blank == true) {
+        blank = false;
         dbputc(' ');
         }
         dbputc('\n');    /* symbols start on a new line */
@@ -278,7 +278,7 @@ putcrossref(void)
         j = symbol[symput].last;
         c = my_yytext[j];
         my_yytext[j] = '\0';
-        if (invertedindex == YES) {
+        if (invertedindex == true) {
         putposting(my_yytext + i, type);
         }
         writestring(my_yytext + i);
@@ -289,10 +289,10 @@ putcrossref(void)
     } else {
         /* HBB: try to save some time by early-out handling of
          * non-compressed mode */
-        if (compress == NO) {
-        if (blank == YES) {
+        if (compress == false) {
+        if (blank == true) {
             dbputc(' ');
-            blank = NO;
+            blank = false;
         }
         j = i + strcspn(my_yytext+i, "\t ");
         if (symput < symbols
@@ -308,7 +308,7 @@ putcrossref(void)
         }
 
         /* check for compressed blanks */
-        if (blank == YES) {
+        if (blank == true) {
         if (dicode2[c]) {
             c = DICODE_COMPRESS(' ', c);
         } else {
@@ -322,7 +322,7 @@ putcrossref(void)
         ++i;
         }
         dbputc((int) c);
-        blank = NO;
+        blank = false;
 
         /* skip compressed characters */
         if (c < ' ') {
@@ -450,7 +450,7 @@ putposting(char *term, int type)
     }
     if (putc('\n', postings) == EOF) {
         cannotwrite(temp1);
-        /* NOTREACHED */
+        /* falseTREACHED */
     }
     ++npostings;
 }
@@ -463,7 +463,7 @@ writestring(char *s)
     unsigned char c;
     int    i;
 
-    if (compress == NO) {
+    if (compress == false) {
         /* Save some I/O overhead by using puts() instead of putc(): */
         dbfputs(s);
         return;
@@ -488,5 +488,5 @@ warning(char *text)
 
     (void) fprintf(stderr, "cscope: \"%s\", line %d: warning: %s\n", filename,
         myylineno, text);
-    errorsfound = YES;
+    errorsfound = true;
 }
diff --git a/src/dir.c b/src/dir.c
index abb5ef4..0362872 100644
--- a/src/dir.c
+++ b/src/dir.c
@@ -17,11 +17,11 @@
  without specific prior written permission.
 
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
- IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT falseT LIMITED TO,
  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
+ PURPOSE ARE DISCLAIMED. IN false EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ CONSEQUENTIAL DAMAGES (INCLUDING, BUT falseT LIMITED TO, PROCUREMENT OF
  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  INTERRUPTION)
  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
@@ -72,11 +72,11 @@ static    struct    listitem {	/* source file names without view pathing */
 } *srcnames[HASHMOD];
 
 /* Internal prototypes: */
-static    BOOL    accessible_file(char *file);
-static    BOOL    issrcfile(char *file);
+static    bool    accessible_file(char *file);
+static    bool    issrcfile(char *file);
 static    void    addsrcdir(char *dir);
 static    void    addincdir(char *name, char *path);
-static    void    scan_dir(const char *dirfile, BOOL recurse);
+static    void    scan_dir(const char *dirfile, bool recurse);
 static    void    makevpsrcdirs(void);
 
 
@@ -262,7 +262,7 @@ freeinclist()
 void
 makefilelist(void)
 {
-    static  BOOL    firstbuild = YES;       /* first time through */
+    static  bool    firstbuild = true;       /* first time through */
     FILE    *names;                 /* name file pointer */
     char    dir[PATHLEN + 1];
     char    path[PATHLEN + 1];
@@ -273,19 +273,19 @@ makefilelist(void)
 
     makevpsrcdirs();    /* make the view source directory list */
 
-    /* if -i was NOT given and there are source file arguments */
+    /* if -i was falseT given and there are source file arguments */
     if (namefile == NULL && fileargc > 0) {
 
     /* put them in a list that can be expanded */
     for (i = 0; i < fileargc; ++i) {
         file = fileargv[i];
-        if (infilelist(file) == NO) {
+        if (infilelist(file) == false) {
         if ((s = inviewpath(file)) != NULL) {
             addsrcfile(s);
         } else {
             fprintf(stderr, "cscope: cannot find file %s\n",
         	    file);
-            errorsfound = YES;
+            errorsfound = true;
         }
         }
     }
@@ -320,7 +320,7 @@ makefilelist(void)
     char *point_in_line = line + (strlen(line) - 1);
     size_t length_of_name = 0;
     int unfinished_option = 0;
-    BOOL done = NO;
+    bool done = false;
 
     /* Kill away \n left at end of fgets()'d string: */
     if (*point_in_line == '\n')
@@ -346,16 +346,16 @@ cscope: Syntax error in namelist file %s: unfinished -I or -p option\n",
         i = path[1];
         switch (i) {
         case 'c':	/* ASCII characters only in crossref */
-            compress = NO;
+            compress = false;
             break;
         case 'k':	/* ignore DFLT_INCDIR */
-            kernelmode = YES;
+            kernelmode = true;
             break;
         case 'q':	/* quick search */
-            invertedindex = YES;
+            invertedindex = true;
             break;
         case 'T':	/* truncate symbols to 8 characters */
-            trun_syms = YES;
+            trun_syms = true;
             break;
         case 'I':	/* #include file directory */
         case 'p':	/* file path components to display */
@@ -372,13 +372,13 @@ cscope: Syntax error in namelist file %s: unfinished -I or -p option\n",
 #define HANDLE_OPTION_ARGUMENT(i, s)        			\
             switch (i) {					\
             case 'I':	/* #include file directory */		\
-        	if (firstbuild == YES) {			\
+        	if (firstbuild == true) {			\
         	    /* expand $ and ~ */			\
         	    shellpath(dir, sizeof(dir), (s));		\
         	    includedir(dir);				\
         	}						\
         	unfinished_option = 0;				\
-        	done = YES;					\
+        	done = true;					\
         	break;						\
             case 'p':	/* file path components to display */	\
         	if (*(s) < '0' || *(s) > '9') {			\
@@ -388,10 +388,10 @@ cscope: Syntax error in namelist file %s: unfinished -I or -p option\n",
         	}						\
         	dispcomponents = atoi(s);			\
         	unfinished_option = 0;				\
-        	done = YES;					\
+        	done = true;					\
         	break;						\
             default:						\
-        	done = NO;					\
+        	done = false;					\
             } /* switch(i) */
 
             /* ... and now call it for the first time */
@@ -439,7 +439,7 @@ cscope: Syntax error in namelist file %s: unfinished -I or -p option\n",
             } else {
         	fprintf(stderr, "cscope: cannot find file %s\n",
         		newpath);
-        	errorsfound = YES;
+        	errorsfound = true;
             }
         }
         free(newpath);
@@ -456,7 +456,7 @@ cscope: Syntax error in namelist file %s: unfinished -I or -p option\n",
             } else {
         	fprintf(stderr, "cscope: cannot find file %s\n",
         		path);
-        	errorsfound = YES;
+        	errorsfound = true;
             }
         }
         } /* else(ordinary name) */
@@ -471,14 +471,14 @@ cscope: Syntax error in namelist file %s: unfinished -I or -p option\n",
     clearerr(stdin);
     else
     fclose(names);
-    firstbuild = NO;
+    firstbuild = false;
     return;
 
 }
 
 /* scan a directory (recursively?) for source files */
 static void
-scan_dir(const char *adir, BOOL recurse_dir)
+scan_dir(const char *adir, bool recurse_dir)
 {
     DIR    *dirfile;
     int adir_len = strlen(adir);
@@ -503,7 +503,7 @@ scan_dir(const char *adir, BOOL recurse_dir)
                                             && S_ISDIR(buf.st_mode) ) {
         				scan_dir(path, recurse_dir);
         			} else if (issrcfile(path)
-        				   && infilelist(path) == NO
+        				   && infilelist(path) == false
         				   && access(path, R_OK) == 0) {
         				addsrcfile(path);
         			}
@@ -517,24 +517,24 @@ scan_dir(const char *adir, BOOL recurse_dir)
 
 
 /* see if this is a source file */
-static BOOL
+static bool
 issrcfile(char *path)
 {
     struct    stat	statstruct;
     char    *file = basename(path);
     char    *s = strrchr(file, '.');
-    BOOL looks_like_source = NO;
+    bool looks_like_source = false;
 
     /* ensure there is some file suffix */
     if (s == NULL || *++s == '\0')
-        return NO;
+        return false;
 
     /* if an SCCS or versioned file */
     if (file[1] == '.' && file + 2 != s) { /* 1 character prefix */
         switch (*file) {
         case 's':
         case 'S':
-        	return(NO);
+        	return(false);
         }
     }
 
@@ -548,7 +548,7 @@ issrcfile(char *path)
         case 'G':
         case 'H':
         case 'L':
-        	looks_like_source = YES;
+        	looks_like_source = true;
         }
     } else if ((s[2] == '\0') /* 2 char suffix */
            && ((s[0] == 'b' && s[1] == 'p') /* breakpoint listing */
@@ -557,7 +557,7 @@ issrcfile(char *path)
                || (s[0] == 's' && s[1] == 'd') /* SDL */
                || (s[0] == 'c' && s[1] == 'c') /* C++ source */
                || (s[0] == 'h' && s[1] == 'h'))) { /* C++ header */
-        looks_like_source = YES;
+        looks_like_source = true;
 
     } else if((s[3] == '\0') /* 3 char suffix */
           /* C++ template source */
@@ -568,18 +568,18 @@ issrcfile(char *path)
               || (s[0] == 'h' && s[1] == 'p' && s[2] == 'p' )
               || (s[0] == 'h' && s[1] == 'x' && s[2] == 'x' ))
           ) {
-        looks_like_source = YES;
+        looks_like_source = true;
     }
 
-    if (looks_like_source != YES)
-        return NO;
+    if (looks_like_source != true)
+        return false;
 
     /* make sure it is a file */
     if (lstat(path, &statstruct) == 0 &&
         S_ISREG(statstruct.st_mode)) {
-        return(YES);
+        return(true);
     }
-    return NO;
+    return false;
 }
 
 
@@ -594,7 +594,7 @@ incfile(char *file, char *type)
 
     assert(file != NULL); /* should never happen, but let's make sure anyway */
     /* see if the file is already in the source file list */
-    if (infilelist(file) == YES) {
+    if (infilelist(file) == true) {
     return;
     }
     /* look in current directory if it was #include "file" */
@@ -609,7 +609,7 @@ incfile(char *file, char *type)
         snprintf(name, sizeof(name), "%.*s/%s",
             (int)(PATHLEN - 2 - file_len), incnames[i],
             file);
-        if (infilelist(name) == YES) {
+        if (infilelist(name) == true) {
         break;
         }
         /* make sure it exists and is readable */
@@ -626,7 +626,7 @@ incfile(char *file, char *type)
 
 
 /* see if the file is already in the list */
-BOOL
+bool
 infilelist(char *path)
 {
     struct listitem *p;
@@ -635,16 +635,16 @@ infilelist(char *path)
      p != NULL;
      p = p->next) {
     if (strequal(path, p->text)) {
-        return(YES);
+        return(true);
     }
     }
-    return(NO);
+    return(false);
 }
 
 
 /* check if a file is readable enough to be allowed in the
  * database */
-static BOOL
+static bool
 accessible_file(char *file)
 {
     if (access(compath(file), READ) == 0) {
@@ -652,10 +652,10 @@ accessible_file(char *file)
 
     if (lstat(file, &stats) == 0
         && S_ISREG(stats.st_mode)) {
-        return YES;
+        return true;
     }
     }
-    return NO;
+    return false;
 }
 
 /* search for the file in the view path */
@@ -719,7 +719,7 @@ freefilelist(void)
     int    i;
 
     /* if '-d' option is used a string space block is allocated */
-    if (isuptodate == NO) {
+    if (isuptodate == false) {
         while (nsrcfiles > 0) {
         	free (srcfiles[--nsrcfiles]);
         }
diff --git a/src/display.c b/src/display.c
index 2fd32de..071e6cd 100644
--- a/src/display.c
+++ b/src/display.c
@@ -17,11 +17,11 @@
  without specific prior written permission.
 
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
- IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT falseT LIMITED TO,
  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
+ PURPOSE ARE DISCLAIMED. IN false EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ CONSEQUENTIAL DAMAGES (INCLUDING, BUT falseT LIMITED TO, PROCUREMENT OF
  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  INTERRUPTION)
  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
@@ -93,7 +93,7 @@ static int mode_window_height;
 
 int window_change = CH_ALL;
 
-const char    dispchars[] = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
+const char    dispchars[] = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMfalsePQRSTUVWXYZ";
 
 static    int    fldline;        /* input field line */
 static    sigjmp_buf    env;        /* setjmp/longjmp buffer */
@@ -148,7 +148,7 @@ dispinit(void)
 
     if (mdisprefs <= 0) {
         postfatal("%s: screen too small\n", argv0);
-        /* NOTREACHED */
+        /* falseTREACHED */
     }
     if(mdisprefs > strlen(dispchars)){
         mdisprefs = strlen(dispchars);
@@ -188,7 +188,7 @@ static inline void display_frame(){
     const int LEFT_PADDING = 5;
     wmove(stdscr, 0, LEFT_PADDING);
 #if CCS
-    if (displayversion == YES) {
+    if (displayversion == true) {
         wprintw(stdscr, "cscope %s", ESG_REL);
     }
     else {
@@ -236,11 +236,11 @@ static inline void display_results(){
         /* redisplay the last message */
         waddstr(wresult, lastmsg);
         return;
-        /* NOTREACHED */
+        /* falseTREACHED */
     }
 
     /* display the pattern */
-    if (changing == YES) {
+    if (changing == true) {
         wprintw(wresult, "Change \"%s\" to \"%s\"", input_line, newpat);
     } else {
         wprintw(wresult, "%c%s: %s", toupper((unsigned char)fields[field].text2[0]),
@@ -248,7 +248,7 @@ static inline void display_results(){
     }
     /* display the column headings */
     wmove(wresult, 2, 2);
-    if (ogs == YES && field != FILENAME) {
+    if (ogs == true && field != FILENAME) {
         wprintw(wresult, "%-*s ", subsystemlen, "Subsystem");
         wprintw(wresult, "%-*s ", booklen, "Book");
     }
@@ -265,10 +265,10 @@ static inline void display_results(){
     wmove(wresult, WRESULT_TABLE_BODY_START, 0);
 
     /* calculate the source text column */
-    /* NOTE: the +1s are column gaps */
+    /* falseTE: the +1s are column gaps */
     srctxtw = second_col_width;
     srctxtw -= 1+1; // dispchars
-    if (ogs == YES) {
+    if (ogs == true) {
         srctxtw -= subsystemlen+1 + booklen+1;
     }
     if (dispcomponents > 0) {
@@ -306,8 +306,8 @@ static inline void display_results(){
         wprintw(wresult, "%c", dispchars[disprefs]);
 
         /* display any change mark */
-        if (changing == YES && change[topline + disprefs - 1] == YES) {
-            waddch(wresult, '>');
+        if (changing == true && change[topline + disprefs - 1] == true) {
+        	waddch(wresult, '>');
         } else {
             waddch(wresult, ' ');
         }
@@ -317,7 +317,7 @@ static inline void display_results(){
         wprintw(wresult, "%-*s ", filelen, file);
         } else {
         /* if OGS, display the subsystem and book names */
-        if (ogs == YES) {
+        if (ogs == true) {
             ogsnames(file, &subsystem, &book);
             wprintw(wresult, "%-*.*s ", subsystemlen, subsystemlen, subsystem);
             wprintw(wresult, "%-*.*s ", booklen, booklen, book);
@@ -476,7 +476,7 @@ display(void)
         wrefresh(wresult);
     }
 
-    window_change = CH_NONE;
+    window_change = CH_falseNE;
 }
 
 void
@@ -510,22 +510,22 @@ jumpback(int sig)
     siglongjmp(env, 1);
 }
 
-BOOL
+bool
 search(void)
 {
-    char    *findresult = NULL;    /* find function output */
-    BOOL    funcexist = YES;        /* find "function" error */
-    FINDINIT rc = NOERROR;        /* findinit return code */
-    sighandler_t savesig;        /* old value of signal */
-    FP    f;            /* searching function */
+    char    *findresult = NULL;	/* find function output */
+    bool    funcexist = true;		/* find "function" error */
+    FINDINIT rc = falseERROR;    	/* findinit return code */
+    sighandler_t savesig;    	/* old value of signal */
+    FP    f;			/* searching function */
     int    c;
 
     /* open the references found file for writing */
-    if (writerefsfound() == NO) {
-        return(NO);
+    if (writerefsfound() == false) {
+        return(false);
     }
     /* find the pattern - stop on an interrupt */
-    if (linemode == NO) {
+    if (linemode == false) {
         postmsg("Searching");
     }
     searchcount = 0;
@@ -535,29 +535,29 @@ search(void)
         if (f == findregexp || f == findstring) {
             findresult = (*f)(input_line);
         } else {
-            if ((nonglobalrefs = myfopen(temp2, "wb")) == NULL) {
-                cannotopen(temp2);
-                return(NO);
-            }
-            if ((rc = findinit(input_line)) == NOERROR) {
-                (void) dbseek(0L); /* read the first block */
-                findresult = (*f)(input_line);
-                if (f == findcalledby)
-                    funcexist = (*findresult == 'y');
-                findcleanup();
+        	if ((nonglobalrefs = myfopen(temp2, "wb")) == NULL) {
+        		cannotopen(temp2);
+        		return(false);
+        	}
+        	if ((rc = findinit(input_line)) == falseERROR) {
+        		(void) dbseek(0L); /* read the first block */
+        		findresult = (*f)(input_line);
+        		if (f == findcalledby)
+        			funcexist = (*findresult == 'y');
+        		findcleanup();
 
-                /* append the non-global references */
-                (void) fclose(nonglobalrefs);
-                if ((nonglobalrefs = myfopen(temp2, "rb"))
-                     == NULL) {
-                    cannotopen(temp2);
-                    return(NO);
-                }
-                while ((c = getc(nonglobalrefs)) != EOF) {
-                    (void) putc(c, refsfound);
-                }
-            }
-            (void) fclose(nonglobalrefs);
+        		/* append the non-global references */
+        		(void) fclose(nonglobalrefs);
+        		if ((nonglobalrefs = myfopen(temp2, "rb"))
+        		     == NULL) {
+        			cannotopen(temp2);
+        			return(false);
+        		}
+        		while ((c = getc(nonglobalrefs)) != EOF) {
+        			(void) putc(c, refsfound);
+        		}
+        	}
+        	(void) fclose(nonglobalrefs);
         }
     }
     signal(SIGINT, savesig);
@@ -569,7 +569,7 @@ search(void)
     (void) fclose(refsfound);
     if ((refsfound = myfopen(temp1, "rb")) == NULL) {
         cannotopen(temp1);
-        return(NO);
+        return(false);
     }
     nextline = 1;
     totallines = 0;
@@ -578,23 +578,23 @@ search(void)
     /* see if it is empty */
     if ((c = getc(refsfound)) == EOF) {
         if (findresult != NULL) {
-            (void) snprintf(lastmsg, sizeof(lastmsg), "Egrep %s in this pattern: %s",
-                       findresult, input_line);
-        } else if (rc == NOTSYMBOL) {
-            (void) snprintf(lastmsg, sizeof(lastmsg), "This is not a C symbol: %s",
-                       input_line);
+        	(void) snprintf(lastmsg, sizeof(lastmsg), "Egrep %s in this pattern: %s",
+        		       findresult, input_line);
+        } else if (rc == falseTSYMBOL) {
+        	(void) snprintf(lastmsg, sizeof(lastmsg), "This is not a C symbol: %s",
+        		       input_line);
         } else if (rc == REGCMPERROR) {
             (void) snprintf(lastmsg, sizeof(lastmsg), "Error in this regcomp(3) regular expression: %s",
                        input_line);
 
-        } else if (funcexist == NO) {
-            (void) snprintf(lastmsg, sizeof(lastmsg), "Function definition does not exist: %s",
-                       input_line);
+        } else if (funcexist == false) {
+        	(void) snprintf(lastmsg, sizeof(lastmsg), "Function definition does not exist: %s",
+        		       input_line);
         } else {
             (void) snprintf(lastmsg, sizeof(lastmsg), "Could not find the %s: %s",
                        fields[field].text2, input_line);
         }
-        return(NO);
+        return(false);
     }
     /* put back the character read */
     (void) ungetc(c, refsfound);
@@ -603,7 +603,7 @@ search(void)
 
     window_change |= CH_RESULT;
 
-    return(YES);
+    return(true);
 }
 
 /* display search progress with default custom format */
@@ -621,7 +621,7 @@ progress(char *what, long current, long max)
     }
     if ((now = time(NULL)) - start >= 1)
     {
-        if (linemode == NO)
+        if (linemode == false)
         {
             wmove(wresult, MSGLINE, 0);
             wclrtoeol(wresult);
@@ -634,13 +634,13 @@ progress(char *what, long current, long max)
             waddstr(wresult, msg);
             refresh();
         }
-        else if (verbosemode == YES)
+        else if (verbosemode == true)
         {
             snprintf(msg, sizeof(msg), "> %s %ld of %ld", what, current, max);
         }
 
         start = now;
-        if ((linemode == NO) && (incurses == YES))
+        if ((linemode == false) && (incurses == true))
         {
             wmove(wresult, MSGLINE, 0);
             i = (float)COLS * (float)current / (float)max;
@@ -652,8 +652,8 @@ progress(char *what, long current, long max)
             refresh();
         }
         else
-            if (linemode == NO || verbosemode == YES)
-                postmsg(msg);
+        	if (linemode == false || verbosemode == true)
+        		postmsg(msg);
     }
     ++searchcount;
 }
@@ -676,7 +676,7 @@ myperror(char *text)
 void
 postmsg(char *msg)
 {
-    if (linemode == YES || incurses == NO) {
+    if (linemode == true || incurses == false) {
         (void) printf("%s\n", msg);
         fflush(stdout);
     }
@@ -701,7 +701,7 @@ clearmsg(void)
 void
 clearmsg2(void)
 {
-    if (linemode == NO) {
+    if (linemode == false) {
         wmove(wresult, MSGLINE + 1, 0);
         wclrtoeol(wresult);
     }
@@ -711,7 +711,7 @@ clearmsg2(void)
 void
 postmsg2(char *msg)
 {
-    if (linemode == YES) {
+    if (linemode == true) {
         (void) printf("%s\n", msg);
     }
     else {
@@ -729,7 +729,7 @@ posterr(char *msg, ...)
     char errbuf[MSGLEN];
 
     va_start(ap, msg);
-    if (linemode == YES || incurses == NO)
+    if (linemode == true || incurses == false)
     {
         (void) vfprintf(stderr, msg, ap);
     (void) fputc('\n', stderr);
@@ -750,7 +750,7 @@ postfatal(const char *msg, ...)
     va_start(ap, msg);
     vsnprintf(errbuf, sizeof(errbuf), msg, ap);
     /* restore the terminal to its original mode */
-    if (incurses == YES) {
+    if (incurses == true) {
         exitcurses();
     }
 
@@ -831,20 +831,20 @@ pathcomponents(char *path, int components)
 }
 
 /* open the references found file for writing */
-BOOL
+bool
 writerefsfound(void)
 {
     if (refsfound == NULL) {
         if ((refsfound = myfopen(temp1, "wb")) == NULL) {
-            cannotopen(temp1);
-            return(NO);
+        	cannotopen(temp1);
+        	return(false);
         }
     } else {
         (void) fclose(refsfound);
         if ( (refsfound = myfopen(temp1, "wb")) == NULL) {
-            postmsg("Cannot reopen temporary file");
-            return(NO);
+        	postmsg("Cannot reopen temporary file");
+        	return(false);
         }
     }
-    return(YES);
+    return(true);
 }
diff --git a/src/edit.c b/src/edit.c
index 7ee79de..d932840 100644
--- a/src/edit.c
+++ b/src/edit.c
@@ -17,11 +17,11 @@
  without specific prior written permission.
 
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
- IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT falseT LIMITED TO,
  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
+ PURPOSE ARE DISCLAIMED. IN false EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ CONSEQUENTIAL DAMAGES (INCLUDING, BUT falseT LIMITED TO, PROCUREMENT OF
  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  INTERRUPTION)
  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
@@ -83,7 +83,7 @@ editall(void)
     /* get each file name and line number */
     while (fscanf(refsfound, "%" PATHLEN_STR "s%*s%" NUMLEN_STR "s%*[^\n]", file, linenum) == 2) {
         edit(file, linenum);	/* edit it */
-        if (editallprompt == YES) {
+        if (editallprompt == true) {
         	addstr("Type ^D to stop editing all lines, or any other character to continue: ");
         	if ((c = mygetch()) == EOF || c == ctrl('D') || c == ctrl('Z')) {
         		break;
diff --git a/src/egrep.c b/src/egrep.c
index 9e2bd86..841f35d 100644
--- a/src/egrep.c
+++ b/src/egrep.c
@@ -88,11 +88,11 @@
  without specific prior written permission.
 
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
- IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT falseT LIMITED TO,
  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
+ PURPOSE ARE DISCLAIMED. IN false EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ CONSEQUENTIAL DAMAGES (INCLUDING, BUT falseT LIMITED TO, PROCUREMENT OF
  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  INTERRUPTION)
  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
@@ -110,53 +110,53 @@
 #include <ctype.h>
 #include <stdio.h>
 
-#include <setjmp.h>    /* jmp_buf */
+#include <setjmp.h>	/* jmp_buf */
 
-#define nextch()    (*input++)
+#define nextch()	(*input++)
 
 #define MAXLIN 350
 #define MAXPOS 4000
 #define NCHARS 256
 #define NSTATES 128
 #define FINAL -1
-static    char gotofn[NSTATES][NCHARS];
-static    int state[NSTATES];
-static    char out[NSTATES];
-static    unsigned int line;
-static    int name[MAXLIN];
-static    unsigned int left[MAXLIN];
-static    unsigned int right[MAXLIN];
-static    unsigned int parent[MAXLIN];
-static    int foll[MAXLIN];
-static    int positions[MAXPOS];
-static    char chars[MAXLIN];
-static    int nxtpos;
-static    int nxtchar;
-static    int tmpstat[MAXLIN];
-static    int initstat[MAXLIN];
-static    int xstate;
-static    int count;
-static    int icount;
-static    char *input;
-static    long lnum;
-static    int iflag;
-static    jmp_buf    env;	/* setjmp/longjmp buffer */
-static    char *message;    /* error message */
+static	char gotofn[NSTATES][NCHARS];
+static	int state[NSTATES];
+static	char out[NSTATES];
+static	unsigned int line;
+static	int name[MAXLIN];
+static	unsigned int left[MAXLIN];
+static	unsigned int right[MAXLIN];
+static	unsigned int parent[MAXLIN];
+static	int foll[MAXLIN];
+static	int positions[MAXPOS];
+static	char chars[MAXLIN];
+static	int nxtpos;
+static	int nxtchar;
+static	int tmpstat[MAXLIN];
+static	int initstat[MAXLIN];
+static	int xstate;
+static	int count;
+static	int icount;
+static	char *input;
+static	long lnum;
+static	int iflag;
+static	jmp_buf	env;	/* setjmp/longjmp buffer */
+static	char *message;	/* error message */
 
 /* Internal prototypes: */
-static    void cfoll(int v);
-static    void cgotofn(void);
-static    int cstate(int v);
-static    int member(int symb, int set, int torf);
-static    int notin(int n);
-static    void synerror(void);
-static    void overflo(void);
-static    void add(int *array, int n);
-static    void follow(unsigned int v);
-static    int unary(int x, int d);
-static    int node(int x, int l, int r);
-static    unsigned int cclenter(int x);
-static    unsigned int enter(int x);
+static	void cfoll(int v);
+static	void cgotofn(void);
+static	int cstate(int v);
+static	int member(int symb, int set, int torf);
+static	int notin(int n);
+static	void synerror(void);
+static	void overflo(void);
+static	void add(int *array, int n);
+static	void follow(unsigned int v);
+static	int unary(int x, int d);
+static	int node(int x, int l, int r);
+static	unsigned int cclenter(int x);
+static	unsigned int enter(int x);
 
 static int yylex(void);
 static int yyerror(char *);
@@ -1242,8 +1242,8 @@ yyreduce:
   case 2: /* s: t  */
 #line 104 "src/egrep.y"
                 { unary(FINAL, yyvsp[0]);
-          line--;
-        }
+		  line--;
+		}
 #line 1248 "y.tab.c"
     break;
 
@@ -1274,7 +1274,7 @@ yyreduce:
   case 7: /* b: %empty  */
 #line 118 "src/egrep.y"
                 { yyval = enter(DOT);
-           yyval = unary(STAR, yyval); }
+		   yyval = unary(STAR, yyval); }
 #line 1279 "y.tab.c"
     break;
 
@@ -1537,9 +1537,9 @@ yyreturnlab:
 static int
 yyerror(char *s)
 {
-    message = s;
-    longjmp(env, 1);
-    return 1;    	/* silence a warning */
+	message = s;
+	longjmp(env, 1);
+	return 1;		/* silence a warning */
 }
 
 static int
@@ -1551,66 +1551,66 @@ yylex(void)
     switch(c = nextch()) {
     case '|':
     case '\n':
-    return (OR);
+	return (OR);
     case '*':
-    return (STAR);
+	return (STAR);
     case '+':
-    return (PLUS);
+	return (PLUS);
     case '?':
-    return (QUEST);
+	return (QUEST);
     case '(':
     case ')':
-    return (c);
+	return (c);
     case '.':
-    return (DOT);
+	return (DOT);
     case '\0':
-    return (0);
+	return (0);
     case '[':
-    x = CCL;
-    cclcnt = 0;
-    count = nxtchar++;
-    if ((c = nextch()) == '^') {
-        x = NCCL;
-        c = nextch();
-    }
-    do {
-        if (c == '\0')
-        synerror();
-        if (   (c == '-')
-        && (cclcnt > 0)
-        && (chars[nxtchar-1] != 0)
-           ) {
-        if ((d = nextch()) != 0) {
-            c = chars[nxtchar-1];
-            while ((unsigned int)c < (unsigned int)d) {
-        	if (nxtchar >= MAXLIN)
-        	    overflo();
-        	chars[nxtchar++] = ++c;
-        	cclcnt++;
-            }
-            continue;
-        } /* if() */
-        } /* if() */
-        if (nxtchar >= MAXLIN)
-        overflo();
-        chars[nxtchar++] = c;
-        cclcnt++;
-    } while ((c = nextch()) != ']');
-    chars[count] = cclcnt;
-    return (x);
+	x = CCL;
+	cclcnt = 0;
+	count = nxtchar++;
+	if ((c = nextch()) == '^') {
+	    x = NCCL;
+	    c = nextch();
+	}
+	do {
+	    if (c == '\0')
+		synerror();
+	    if (   (c == '-')
+		&& (cclcnt > 0)
+		&& (chars[nxtchar-1] != 0)
+	       ) {
+		if ((d = nextch()) != 0) {
+		    c = chars[nxtchar-1];
+		    while ((unsigned int)c < (unsigned int)d) {
+			if (nxtchar >= MAXLIN)
+			    overflo();
+			chars[nxtchar++] = ++c;
+			cclcnt++;
+		    }
+		    continue;
+		} /* if() */
+	    } /* if() */
+	    if (nxtchar >= MAXLIN)
+		overflo();
+	    chars[nxtchar++] = c;
+	    cclcnt++;
+	} while ((c = nextch()) != ']');
+	chars[count] = cclcnt;
+	return (x);
     case '\\':
-    if ((c = nextch()) == '\0')
-        synerror();
-    yylval = c;
-    return (CHAR);
+	if ((c = nextch()) == '\0')
+	    synerror();
+	yylval = c;
+	return (CHAR);
     case '$':
     case '^':
-    c = '\n';
-    yylval = c;
-    return (CHAR);
+	c = '\n';
+	yylval = c;
+	return (CHAR);
     default:
-    yylval = c;
-    return (CHAR);
+	yylval = c;
+	return (CHAR);
     }
 }
 
@@ -1624,7 +1624,7 @@ static unsigned int
 enter(int x)
 {
     if(line >= MAXLIN)
-    overflo();
+	overflo();
     name[line] = x;
     left[line] = 0;
     right[line] = 0;
@@ -1645,7 +1645,7 @@ static int
 node(int x, int l, int r)
 {
     if(line >= MAXLIN)
-    overflo();
+	overflo();
     name[line] = x;
     left[line] = l;
     right[line] = r;
@@ -1658,7 +1658,7 @@ static int
 unary(int x, int d)
 {
     if(line >= MAXLIN)
-    overflo();
+	overflo();
     name[line] = x;
     left[line] = d;
     right[line] = 0;
@@ -1678,16 +1678,16 @@ cfoll(int v)
     unsigned int i;
 
     if (left[v] == 0) {
-    count = 0;
-    for (i = 1; i <= line; i++)
-        tmpstat[i] = 0;
-    follow(v);
-    add(foll, v);
+	count = 0;
+	for (i = 1; i <= line; i++)
+	    tmpstat[i] = 0;
+	follow(v);
+	add(foll, v);
     } else if (right[v] == 0)
-    cfoll(left[v]);
+	cfoll(left[v]);
     else {
-    cfoll(left[v]);
-    cfoll(right[v]);
+	cfoll(left[v]);
+	cfoll(right[v]);
     }
 }
 
@@ -1704,126 +1704,126 @@ cgotofn(void)
 
     count = 0;
     for (n=3; n<=line; n++)
-    tmpstat[n] = 0;
+	tmpstat[n] = 0;
     if (cstate(line-1)==0) {
-    tmpstat[line] = 1;
-    count++;
-    out[0] = 1;
+	tmpstat[line] = 1;
+	count++;
+	out[0] = 1;
     }
     for (n=3; n<=line; n++)
-    initstat[n] = tmpstat[n];
-    count--;        /*leave out position 1 */
+	initstat[n] = tmpstat[n];
+    count--;		/*leave out position 1 */
     icount = count;
     tmpstat[1] = 0;
     add(state, 0);
     n = 0;
     for (s = 0; s <= n; s++)  {
-    if (out[s] == 1)
-        continue;
-    for (i = 0; i < NCHARS; i++)
-        symbol[i] = 0;
-    num = positions[state[s]];
-    count = icount;
-    for (i = 3; i <= line; i++)
-        tmpstat[i] = initstat[i];
-    pos = state[s] + 1;
-    for (i = 0; i < num; i++) {
-        curpos = positions[pos];
-        if ((c = name[curpos]) >= 0) {
-        if (c < NCHARS) {
-            symbol[c] = 1;
-        } else if (c == DOT) {
-            for (k = 0; k < NCHARS; k++)
-        	if (k != '\n')
-        	    symbol[k] = 1;
-        } else if (c == CCL) {
-            nc = chars[right[curpos]];
-            pc = right[curpos] + 1;
-            for (j = 0; j < nc; j++)
-        	symbol[(unsigned char)chars[pc++]] = 1;
-        } else if (c == NCCL) {
-            nc = chars[right[curpos]];
-            for (j = 0; j < NCHARS; j++) {
-        	pc = right[curpos] + 1;
-        	for (l = 0; l < nc; l++)
-        	    if (j==(unsigned char)chars[pc++])
-        		goto cont;
-        	if (j != '\n')
-        	    symbol[j] = 1;
-            cont:
-        	;
-            }
-        }
-        }
-        pos++;
-    } /* for (i) */
-    for (c=0; c<NCHARS; c++) {
-        if (symbol[c] == 1) {
-        /* nextstate(s,c) */
-        count = icount;
-        for (i=3; i <= line; i++)
-            tmpstat[i] = initstat[i];
-        pos = state[s] + 1;
-        for (i=0; i<num; i++) {
-            curpos = positions[pos];
-            if ((k = name[curpos]) >= 0)
-        	if ((k == c)
-        	    || (k == DOT)
-        	    || (k == CCL && member(c, right[curpos], 1))
-        	    || (k == NCCL && member(c, right[curpos], 0))
-        	    ) {
-        	    number = positions[foll[curpos]];
-        	    newpos = foll[curpos] + 1;
-        	    for (j = 0; j < number; j++) {
-        		if (tmpstat[positions[newpos]] != 1) {
-        		    tmpstat[positions[newpos]] = 1;
-        		    count++;
-        		}
-        		newpos++;
-        	    }
-        	}
-            pos++;
-        } /* end nextstate */
-        if (notin(n)) {
-            if (n >= NSTATES)
-        	overflo();
-            add(state, ++n);
-            if (tmpstat[line] == 1)
-        	out[n] = 1;
-            gotofn[s][c] = n;
-        } else {
-            gotofn[s][c] = xstate;
-        }
-        } /* if (symbol) */
-    } /* for(c) */
+	if (out[s] == 1)
+	    continue;
+	for (i = 0; i < NCHARS; i++)
+	    symbol[i] = 0;
+	num = positions[state[s]];
+	count = icount;
+	for (i = 3; i <= line; i++)
+	    tmpstat[i] = initstat[i];
+	pos = state[s] + 1;
+	for (i = 0; i < num; i++) {
+	    curpos = positions[pos];
+	    if ((c = name[curpos]) >= 0) {
+		if (c < NCHARS) {
+		    symbol[c] = 1;
+		} else if (c == DOT) {
+		    for (k = 0; k < NCHARS; k++)
+			if (k != '\n')
+			    symbol[k] = 1;
+		} else if (c == CCL) {
+		    nc = chars[right[curpos]];
+		    pc = right[curpos] + 1;
+		    for (j = 0; j < nc; j++)
+			symbol[(unsigned char)chars[pc++]] = 1;
+		} else if (c == NCCL) {
+		    nc = chars[right[curpos]];
+		    for (j = 0; j < NCHARS; j++) {
+			pc = right[curpos] + 1;
+			for (l = 0; l < nc; l++)
+			    if (j==(unsigned char)chars[pc++])
+				goto cont;
+			if (j != '\n')
+			    symbol[j] = 1;
+		    cont:
+			;
+		    }
+		}
+	    }
+	    pos++;
+	} /* for (i) */
+	for (c=0; c<NCHARS; c++) {
+	    if (symbol[c] == 1) {
+		/* nextstate(s,c) */
+		count = icount;
+		for (i=3; i <= line; i++)
+		    tmpstat[i] = initstat[i];
+		pos = state[s] + 1;
+		for (i=0; i<num; i++) {
+		    curpos = positions[pos];
+		    if ((k = name[curpos]) >= 0)
+			if ((k == c)
+			    || (k == DOT)
+			    || (k == CCL && member(c, right[curpos], 1))
+			    || (k == NCCL && member(c, right[curpos], 0))
+			    ) {
+			    number = positions[foll[curpos]];
+			    newpos = foll[curpos] + 1;
+			    for (j = 0; j < number; j++) {
+				if (tmpstat[positions[newpos]] != 1) {
+				    tmpstat[positions[newpos]] = 1;
+				    count++;
+				}
+				newpos++;
+			    }
+			}
+		    pos++;
+		} /* end nextstate */
+		if (notin(n)) {
+		    if (n >= NSTATES)
+			overflo();
+		    add(state, ++n);
+		    if (tmpstat[line] == 1)
+			out[n] = 1;
+		    gotofn[s][c] = n;
+		} else {
+		    gotofn[s][c] = xstate;
+		}
+	    } /* if (symbol) */
+	} /* for(c) */
     } /* for(s) */
 }
 
 static int
 cstate(int v)
 {
-    int b;
-    if (left[v] == 0) {
-        if (tmpstat[v] != 1) {
-        	tmpstat[v] = 1;
-        	count++;
-        }
-        return(1);
-    }
-    else if (right[v] == 0) {
-        if (cstate(left[v]) == 0) return (0);
-        else if (name[v] == PLUS) return (1);
-        else return (0);
-    }
-    else if (name[v] == CAT) {
-        if (cstate(left[v]) == 0 && cstate(right[v]) == 0) return (0);
-        else return (1);
-    }
-    else { /* name[v] == OR */
-        b = cstate(right[v]);
-        if (cstate(left[v]) == 0 || b == 0) return (0);
-        else return (1);
-    }
+	int b;
+	if (left[v] == 0) {
+		if (tmpstat[v] != 1) {
+			tmpstat[v] = 1;
+			count++;
+		}
+		return(1);
+	}
+	else if (right[v] == 0) {
+		if (cstate(left[v]) == 0) return (0);
+		else if (name[v] == PLUS) return (1);
+		else return (0);
+	}
+	else if (name[v] == CAT) {
+		if (cstate(left[v]) == 0 && cstate(right[v]) == 0) return (0);
+		else return (1);
+	}
+	else { /* name[v] == OR */
+		b = cstate(right[v]);
+		if (cstate(left[v]) == 0 || b == 0) return (0);
+		else return (1);
+	}
 }
 
 static int
@@ -1834,26 +1834,26 @@ member(int symb, int set, int torf)
     num = chars[set];
     pos = set + 1;
     for (i = 0; i < num; i++)
-    if (symb == (unsigned char)(chars[pos++]))
-        return (torf);
+	if (symb == (unsigned char)(chars[pos++]))
+	    return (torf);
     return (!torf);
 }
 
 static int
 notin(int n)
 {
-    int i, j, pos;
-    for (i=0; i<=n; i++) {
-        if (positions[state[i]] == count) {
-        	pos = state[i] + 1;
-        	for (j=0; j < count; j++)
-        		if (tmpstat[positions[pos++]] != 1) goto nxt;
-        	xstate = i;
-        	return (0);
-        }
-        nxt: ;
-    }
-    return (1);
+	int i, j, pos;
+	for (i=0; i<=n; i++) {
+		if (positions[state[i]] == count) {
+			pos = state[i] + 1;
+			for (j=0; j < count; j++)
+				if (tmpstat[positions[pos++]] != 1) goto nxt;
+			xstate = i;
+			return (0);
+		}
+		nxt: ;
+	}
+	return (1);
 }
 
 static void
@@ -1862,13 +1862,13 @@ add(int *array, int n)
     unsigned int i;
 
     if (nxtpos + count > MAXPOS)
-    overflo();
+	overflo();
     array[n] = nxtpos;
     positions[nxtpos++] = count;
     for (i=3; i <= line; i++) {
-    if (tmpstat[i] == 1) {
-        positions[nxtpos++] = i;
-    }
+	if (tmpstat[i] == 1) {
+	    positions[nxtpos++] = i;
+	}
     }
 }
 
@@ -1878,33 +1878,33 @@ follow(unsigned int v)
     unsigned int p;
 
     if (v == line)
-    return;
+	return;
     p = parent[v];
     switch(name[p]) {
     case STAR:
-    case PLUS:    cstate(v);
-    follow(p);
-    return;
+    case PLUS:	cstate(v);
+	follow(p);
+	return;
 
     case OR:
-    case QUEST:    follow(p);
-    return;
+    case QUEST:	follow(p);
+	return;
 
     case CAT:
-    if (v == left[p]) {
-        if (cstate(right[p]) == 0) {
-        follow(p);
-        return;
-        }
-    } else
-        follow(p);
-    return;
+	if (v == left[p]) {
+	    if (cstate(right[p]) == 0) {
+		follow(p);
+		return;
+	    }
+	} else
+	    follow(p);
+	return;
     case FINAL:
-    if (tmpstat[line] != 1) {
-        tmpstat[line] = 1;
-        count++;
-    }
-    return;
+	if (tmpstat[line] != 1) {
+	    tmpstat[line] = 1;
+	    count++;
+	}
+	return;
     }
 }
 
@@ -1933,9 +1933,9 @@ egrepinit(char *egreppat)
     input = egreppat;
     message = NULL;
     if (setjmp(env) == 0) {
-    yyparse();
-    cfoll(line-1);
-    cgotofn();
+	yyparse();
+	cfoll(line-1);
+	cgotofn();
     }
     return(message);
 }
@@ -1947,11 +1947,11 @@ static size_t read_next_chunk(char **p, FILE *fptr)
 {
     if (*p <= (buf + BUFSIZ)) {
         /* bwlow the middle, so enough space left for one entire BUFSIZ */
-    return fread(*p, sizeof(**p), BUFSIZ, fptr);
+	return fread(*p, sizeof(**p), BUFSIZ, fptr);
     } else if (*p == buf_end) {
         /* exactly at end ... wrap around and use lower half */
-    *p = buf;
-    return fread(*p, sizeof(**p), BUFSIZ, fptr);
+	*p = buf;
+	return fread(*p, sizeof(**p), BUFSIZ, fptr);
     }
     /* somewhere in second half, so do a limited read */
     return fread(*p, sizeof(**p), buf_end - *p, fptr);
@@ -1969,7 +1969,7 @@ egrep(char *file, FILE *output, char *format)
     FILE *fptr;
 
     if ((fptr = myfopen(file, "r")) == NULL)
-    return(-1);
+	return(-1);
 
     lnum = 1;
     p = buf;
@@ -1977,70 +1977,70 @@ egrep(char *file, FILE *output, char *format)
     ccount = read_next_chunk(&p, fptr);
 
     if (ccount <= 0) {
-    fclose(fptr);
-    return(0);
+	fclose(fptr);
+	return(0);
     }
     in_line = 1;
     istat = cstat = (unsigned int) gotofn[0]['\n'];
     if (out[cstat])
-    goto found;
+	goto found;
     for (;;) {
-    if (!iflag) {
-        /* all input chars made positive */
-        cstat = (unsigned int) gotofn[cstat][(unsigned char)*p];
-    } else {
-        /* for -i option*/
-        cstat = (unsigned int) gotofn[cstat][tolower((unsigned char)*p)];
+	if (!iflag) {
+	    /* all input chars made positive */
+	    cstat = (unsigned int) gotofn[cstat][(unsigned char)*p];
+	} else {
+	    /* for -i option*/
+	    cstat = (unsigned int) gotofn[cstat][tolower((unsigned char)*p)];
         }
-    if (out[cstat]) {
-    found:
-        for(;;) {
-        if (*p++ == '\n') {
-            in_line = 0;
-        succeed:
-            fprintf(output, format, file, lnum);
-            if (p <= nlp) {
-        	while (nlp < buf_end)
-        	    putc(*nlp++, output);
-        	nlp = buf;
-            }
-            while (nlp < p)
-        	putc(*nlp++, output);
-            lnum++;
-            nlp = p;
-            if (out[cstat = istat] == 0)
-        	goto brk2;
-        } /* if (p++ == \n) */
-        cfound:
-        if (--ccount <= 0) {
-            ccount = read_next_chunk(&p, fptr);
-            if (ccount <= 0) {
-        	if (in_line) {
-        	    in_line = 0;
-        	    goto succeed;
-        	}
+	if (out[cstat]) {
+	found:
+	    for(;;) {
+		if (*p++ == '\n') {
+		    in_line = 0;
+		succeed:
+		    fprintf(output, format, file, lnum);
+		    if (p <= nlp) {
+			while (nlp < buf_end)
+			    putc(*nlp++, output);
+			nlp = buf;
+		    }
+		    while (nlp < p)
+			putc(*nlp++, output);
+		    lnum++;
+		    nlp = p;
+		    if (out[cstat = istat] == 0)
+			goto brk2;
+		} /* if (p++ == \n) */
+	    cfound:
+		if (--ccount <= 0) {
+		    ccount = read_next_chunk(&p, fptr);
+		    if (ccount <= 0) {
+			if (in_line) {
+			    in_line = 0;
+			    goto succeed;
+			}
                         fclose(fptr);
                         return(0);
-            }
-        } /* if(ccount <= 0) */
-        in_line = 1;
-        } /* for(ever) */
-    } /* if(out[cstat]) */
+		    }
+		} /* if(ccount <= 0) */
+		in_line = 1;
+	    } /* for(ever) */
+	} /* if(out[cstat]) */
 
-    if (*p++ == '\n') {
-        in_line = 0;
-        lnum++;
-        nlp = p;
-        if (out[(cstat=istat)])
-        goto cfound;
-    }
+	if (*p++ == '\n') {
+	    in_line = 0;
+	    lnum++;
+	    nlp = p;
+	    if (out[(cstat=istat)])
+		goto cfound;
+	}
     brk2:
-    if (--ccount <= 0) {
-        ccount = read_next_chunk(&p, fptr);
-        if (ccount <= 0)
-        break;
-    }
-    in_line = 1;
+	if (--ccount <= 0) {
+	    ccount = read_next_chunk(&p, fptr);
+	    if (ccount <= 0)
+		break;
+	}
+	in_line = 1;
     }
     fclose(fptr);
     return(0);
@@ -2049,5 +2049,5 @@ egrep(char *file, FILE *output, char *format)
 void
 egrepcaseless(int i)
 {
-    iflag = i;    /* simulate "egrep -i" */
+	iflag = i;	/* simulate "egrep -i" */
 }
diff --git a/src/egrep.h b/src/egrep.h
index 2671791..2791837 100644
--- a/src/egrep.h
+++ b/src/egrep.h
@@ -31,7 +31,7 @@
    This special exception was added by the Free Software Foundation in
    version 2.2 of Bison.  */
 
-/* DO NOT RELY ON FEATURES THAT ARE NOT DOCUMENTED in the manual,
+/* DO falseT RELY ON FEATURES THAT ARE NOT DOCUMENTED in the manual,
    especially those whose name start with YY_ or yy_.  They are
    private implementation details that can be changed or removed.  */
 
diff --git a/src/egrep.y b/src/egrep.y
index d3c6e33..a372042 100644
--- a/src/egrep.y
+++ b/src/egrep.y
@@ -18,11 +18,11 @@
  without specific prior written permission.
 
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
- IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT falseT LIMITED TO,
  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
+ PURPOSE ARE DISCLAIMED. IN false EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ CONSEQUENTIAL DAMAGES (INCLUDING, BUT falseT LIMITED TO, PROCUREMENT OF
  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  INTERRUPTION)
  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
diff --git a/src/exec.c b/src/exec.c
index f196bb9..de91b6b 100644
--- a/src/exec.c
+++ b/src/exec.c
@@ -17,11 +17,11 @@
  without specific prior written permission.
 
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
- IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT falseT LIMITED TO,
  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
+ PURPOSE ARE DISCLAIMED. IN false EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ CONSEQUENTIAL DAMAGES (INCLUDING, BUT falseT LIMITED TO, PROCUREMENT OF
  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  INTERRUPTION)
  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
@@ -125,7 +125,7 @@ myexecvp(char *a, char **args)
     perror(msg);        /* display the reason */
     askforreturn();        /* wait until the user sees the message */
     myexit(1);        /* exit the child */
-    /* NOTREACHED */
+    /* falseTREACHED */
     return 0;
 }
 
diff --git a/src/find.c b/src/find.c
index 685e90a..b067e48 100644
--- a/src/find.c
+++ b/src/find.c
@@ -17,11 +17,11 @@
  without specific prior written permission.
 
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
- IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT falseT LIMITED TO,
  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
+ PURPOSE ARE DISCLAIMED. IN false EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ CONSEQUENTIAL DAMAGES (INCLUDING, BUT falseT LIMITED TO, PROCUREMENT OF
  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  INTERRUPTION)
  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
@@ -68,17 +68,17 @@ static    long    lastfcnoffset;		/* last function name offset */
 static    POSTING    *postingp;		/* retrieved posting set pointer */
 static    long    postingsfound;		/* retrieved number of postings */
 static    regex_t regexp;    		/* regular expression */
-static    BOOL    isregexp_valid = NO;	/* regular expression status */
+static    bool    isregexp_valid = false;	/* regular expression status */
 
-static    BOOL    match(void);
-static    BOOL    matchrest(void);
+static    bool    match(void);
+static    bool    matchrest(void);
 static    POSTING    *getposting(void);
 static    char    *lcasify(char *s);
-static    void    findcalledbysub(char *file, BOOL macro);
+static    void    findcalledbysub(char *file, bool macro);
 static    void    findterm(char *pattern);
 static    void    putline(FILE *output);
-static  char    *find_symbol_or_assignment(char *pattern, BOOL assign_flag);
-static  BOOL    check_for_assignment(void);
+static  char    *find_symbol_or_assignment(char *pattern, bool assign_flag);
+static  bool    check_for_assignment(void);
 static    void    putpostingref(POSTING *p, char *pat);
 static    void    putref(int seemore, char *file, char *func);
 static    void    putsource(int seemore, FILE *output);
@@ -88,19 +88,19 @@ static    void    putsource(int seemore, FILE *output);
 char *
 findsymbol(char *pattern)
 {
-    return find_symbol_or_assignment(pattern, NO);
+    return find_symbol_or_assignment(pattern, false);
 }
 
 /* find the symbol in the cross-reference, and look for assignments */
 char *
 findassign(char *pattern)
 {
-    return find_symbol_or_assignment(pattern, YES);
+    return find_symbol_or_assignment(pattern, true);
 }
 
 /* Test reference whether it's an assignment to the symbol found at
  * (global variable) 'blockp' */
-static BOOL
+static bool
 check_for_assignment(void)
 {
     /* Do the extra work here to determine if this is an
@@ -115,18 +115,18 @@ check_for_assignment(void)
         /* get the next block when we reach the end of
          * the current block */
         if (NULL == (asgn_char = read_block()))
-        return NO;
+        return false;
     }
     }
     /* check for digraph starting with = */
     if ((asgn_char[0] & 0x80) && (dichar1[(asgn_char[0] & 0177)/8] == '=')) {
-    return YES;
+    return true;
     }
     /* check for plain '=', not '==' */
     if ((asgn_char[0] == '=') &&
     (((asgn_char[1] != '=') && !(asgn_char[1] & 0x80)) ||
      ((asgn_char[1] & 0x80) && (dichar1[(asgn_char[1]& 0177)/8] != '=')))) {
-    return YES;
+    return true;
     }
 
     /* check for operator assignments: +=, ... ^= ? */
@@ -142,7 +142,7 @@ check_for_assignment(void)
     && ((asgn_char[1] == '=') || ((asgn_char[1] & 0x80) && (dichar1[(asgn_char[1] &0177)/8] == '=')))
 
        ) {
-    return YES;
+    return true;
     }
 
     /* check for two-letter operator assignments: <<= or >>= ? */
@@ -152,14 +152,14 @@ check_for_assignment(void)
     && (asgn_char[1] == asgn_char[0])
     && ((asgn_char[2] == '=') || ((asgn_char[2] & 0x80) && (dichar1[(asgn_char[2] & 0177)/8] == '=')))
        )
-    return YES;
-    return NO;
+    return true;
+    return false;
 }
 
 /* The actual routine that does the work for findsymbol() and
 * findassign() */
 static char *
-find_symbol_or_assignment(char *pattern, BOOL assign_flag)
+find_symbol_or_assignment(char *pattern, bool assign_flag)
 {
     char    file[PATHLEN + 1];	/* source file name */
     char    function[PATLEN + 1];	/* function name */
@@ -169,9 +169,9 @@ find_symbol_or_assignment(char *pattern, BOOL assign_flag)
     char    *s;
     size_t    s_len = 0;
     char firstchar;    	/* first character of a potential symbol */
-    BOOL fcndef = NO;
+    bool fcndef = false;
 
-    if ((invertedindex == YES) && (assign_flag == NO)) {
+    if ((invertedindex == true) && (assign_flag == false)) {
         long	lastline = 0;
         POSTING *p;
 
@@ -233,7 +233,7 @@ find_symbol_or_assignment(char *pattern, BOOL assign_flag)
         		goto notmatched;	/* don't match name */
 
         	case FCNDEF:		/* function name */
-        		fcndef = YES;
+        		fcndef = true;
         		s = function;
         		s_len = sizeof(function);
         		break;
@@ -264,8 +264,8 @@ find_symbol_or_assignment(char *pattern, BOOL assign_flag)
         	fetch_string_from_dbase(s, s_len);
 
         	/* see if this is a regular expression pattern */
-        	if (isregexp_valid == YES) {
-        		if (caseless == YES) {
+        	if (isregexp_valid == true) {
+        		if (caseless == true) {
         			s = lcasify(s);
         		}
         		if (*s != '\0' && regexec (&regexp, s, (size_t)0, NULL, 0) == 0) {
@@ -279,7 +279,7 @@ find_symbol_or_assignment(char *pattern, BOOL assign_flag)
         	goto notmatched;
         }
         /* if this is a regular expression pattern */
-        if (isregexp_valid == YES) {
+        if (isregexp_valid == true) {
 
         	/* if this is a symbol */
 
@@ -300,7 +300,7 @@ find_symbol_or_assignment(char *pattern, BOOL assign_flag)
         	if (isalpha((unsigned char)firstchar) || firstchar == '_') {
         		blockp = cp;
         		fetch_string_from_dbase(symbol, sizeof(symbol));
-        		if (caseless == YES) {
+        		if (caseless == true) {
         			s = lcasify(symbol);	/* point to lower case version */
         		}
         		else {
@@ -325,7 +325,7 @@ find_symbol_or_assignment(char *pattern, BOOL assign_flag)
         		/* if the assignment flag is set then
         		 * we are looking for assignments and
         		 * some extra filtering is needed */
-        		if(assign_flag == YES
+        		if(assign_flag == true
         		  && ! check_for_assignment())
         		       goto notmatched;
 
@@ -334,8 +334,8 @@ find_symbol_or_assignment(char *pattern, BOOL assign_flag)
         		if (strcmp(macro, global) && s != macro) {
         			putref(0, file, macro);
         		}
-        		else if (fcndef == YES || s != function) {
-        			fcndef = NO;
+        		else if (fcndef == true || s != function) {
+        			fcndef = false;
         			putref(0, file, function);
         		}
         		else {
@@ -346,7 +346,7 @@ find_symbol_or_assignment(char *pattern, BOOL assign_flag)
         	if (blockp == NULL) {
         		return NULL;
         	}
-        	fcndef = NO;
+        	fcndef = false;
         	cp = blockp;
         }
     }
@@ -361,7 +361,7 @@ finddef(char *pattern)
 {
     char    file[PATHLEN + 1];	/* source file name */
 
-    if (invertedindex == YES) {
+    if (invertedindex == true) {
         POSTING *p;
 
         findterm(pattern);
@@ -469,7 +469,7 @@ findcalling(char *pattern)
     char    *tmpblockp;
     int    morefuns, i;
 
-    if (invertedindex == YES) {
+    if (invertedindex == true) {
         POSTING	*p;
 
         findterm(pattern);
@@ -607,7 +607,7 @@ findfile(char *dummy)
     for (i = 0; i < nsrcfiles; ++i) {
     char *s;
 
-    if (caseless == YES) {
+    if (caseless == true) {
         s = lcasify(srcfiles[i]);
     } else {
         s = srcfiles[i];
@@ -628,7 +628,7 @@ findinclude(char *pattern)
 {
     char    file[PATHLEN + 1];	/* source file name */
 
-    if (invertedindex == YES) {
+    if (invertedindex == true) {
         POSTING *p;
 
         findterm(pattern);
@@ -673,16 +673,16 @@ FINDINIT
 findinit(char *pattern)
 {
     char    buf[PATLEN + 3];
-    BOOL    isregexp = NO;
+    bool    isregexp = false;
     int    i;
     char    *s;
     unsigned char c;    /* HBB 20010427: changed uint to uchar */
 
     /* HBB: be nice: free regexp before allocating a new one */
-    if(isregexp_valid == YES)
+    if(isregexp_valid == true)
         regfree(&regexp);
 
-    isregexp_valid = NO;
+    isregexp_valid = false;
 
     /* remove trailing white space */
     for (s = pattern + strlen(pattern) - 1;
@@ -694,7 +694,7 @@ findinit(char *pattern)
     /* HBB 20020620: new: make sure pattern is lowercased. Curses
      * mode gets this right all on its own, but at least -L mode
      * doesn't */
-    if (caseless == YES) {
+    if (caseless == true) {
         pattern = lcasify(pattern);
     }
 
@@ -703,35 +703,35 @@ findinit(char *pattern)
         if (regcomp (&regexp, pattern, REG_EXTENDED | REG_NOSUB) != 0) {
         	return(REGCMPERROR);
         } else {
-        	isregexp_valid = YES;
+        	isregexp_valid = true;
         }
-        return(NOERROR);
+        return(falseERROR);
     }
     /* see if the pattern is a regular expression */
     if (strpbrk(pattern, "^.[{*+$|(") != NULL) {
-        isregexp = YES;
+        isregexp = true;
     } else {
         /* check for a valid C symbol */
         s = pattern;
         if (!isalpha((unsigned char)*s) && *s != '_') {
-        	return(NOTSYMBOL);
+        	return(falseTSYMBOL);
         }
         while (*++s != '\0') {
         	if (!isalnum((unsigned char)*s) && *s != '_') {
-        		return(NOTSYMBOL);
+        		return(falseTSYMBOL);
         	}
         }
         /* look for use of the -T option (truncate symbol to 8
            characters) on a database not built with -T */
-        if (trun_syms == YES && isuptodate == YES &&
-            dbtruncated == NO && s - pattern >= 8) {
+        if (trun_syms == true && isuptodate == true &&
+            dbtruncated == false && s - pattern >= 8) {
         	(void) strcpy(pattern + 8, ".*");
-        	isregexp = YES;
+        	isregexp = true;
         }
     }
     /* if this is a regular expression or letter case is to be ignored */
     /* or there is an inverted index */
-    if (isregexp == YES || caseless == YES || invertedindex == YES) {
+    if (isregexp == true || caseless == true || invertedindex == true) {
 
         /* remove a leading ^ */
         s = pattern;
@@ -748,7 +748,7 @@ findinit(char *pattern)
         	s[i] = '\0';
         }
         /* if requested, try to truncate a C symbol pattern */
-        if (trun_syms == YES && strpbrk(s, "[{*+") == NULL) {
+        if (trun_syms == true && strpbrk(s, "[{*+") == NULL) {
         	s[8] = '\0';
         }
         /* must be an exact match */
@@ -760,12 +760,12 @@ findinit(char *pattern)
         }
         else
         {
-        	isregexp_valid = YES;
+        	isregexp_valid = true;
         }
     }
     else {
         /* if requested, truncate a C symbol pattern */
-        if (trun_syms == YES && field <= CALLING) {
+        if (trun_syms == true && field <= CALLING) {
         	pattern[8] = '\0';
         }
         /* compress the string pattern for matching */
@@ -779,7 +779,7 @@ findinit(char *pattern)
         }
         *s = '\0';
     }
-    return(NOERROR);
+    return(falseERROR);
 }
 
 void
@@ -790,31 +790,31 @@ findcleanup(void)
 
 /* match the pattern to the string */
 
-static BOOL
+static bool
 match(void)
 {
     char    string[PATLEN + 1];
 
     /* see if this is a regular expression pattern */
-    if (isregexp_valid == YES) {
+    if (isregexp_valid == true) {
         fetch_string_from_dbase(string, sizeof(string));
         if (*string == '\0') {
-        	return(NO);
+        	return(false);
         }
-        if (caseless == YES) {
-        	return (regexec (&regexp, lcasify(string), (size_t)0, NULL, 0) ? NO : YES);
+        if (caseless == true) {
+        	return (regexec (&regexp, lcasify(string), (size_t)0, NULL, 0) ? false : true);
         }
         else {
-        	return (regexec (&regexp, string, (size_t)0, NULL, 0) ? NO : YES);
+        	return (regexec (&regexp, string, (size_t)0, NULL, 0) ? false : true);
         }
     }
     /* it is a string pattern */
-    return((BOOL) (*blockp == cpattern[0] && matchrest()));
+    return((bool) (*blockp == cpattern[0] && matchrest()));
 }
 
 /* match the rest of the pattern to the name */
 
-static BOOL
+static bool
 matchrest(void)
 {
     int    i = 1;
@@ -828,9 +828,9 @@ matchrest(void)
     } while (*(blockp + 1) == '\0' && read_block() != NULL);
 
     if (*blockp == '\n' && cpattern[i] == '\0') {
-        return(YES);
+        return(true);
     }
-    return(NO);
+    return(false);
 }
 
 /* put the reference into the file */
@@ -857,7 +857,7 @@ putsource(int seemore, FILE *output)
 {
     char *tmpblockp;
     char    *cp, nextc = '\0';
-    BOOL Change = NO, retreat = NO;
+    bool Change = false, retreat = false;
 
     if (fileversion <= 5) {
         (void) scanpast(' ');
@@ -870,7 +870,7 @@ putsource(int seemore, FILE *output)
     while (*cp != '\n' || nextc != '\n') {
         nextc = *cp;
         if (--cp < block) {
-        	retreat = YES;
+        	retreat = true;
         	/* read the previous block */
         	(void) dbseek((blocknumber - 1) * BUFSIZ);
         	cp = block + (BUFSIZ - 1);
@@ -880,19 +880,19 @@ putsource(int seemore, FILE *output)
     if (*blockp != '\n' || getrefchar() != '\n' ||
         (!isdigit(getrefchar()) && fileversion >= 12)) {
         postfatal("Internal error: cannot get source line from database");
-        /* NOTREACHED */
+        /* falseTREACHED */
     }
     /* until a double newline is found */
     do {
         /* skip a symbol type */
         if (*blockp == '\t') {
-        	/* if retreat == YES, that means tmpblockp and blockp
+        	/* if retreat == true, that means tmpblockp and blockp
         	 * point to different blocks.  Offset comparison should
-        	 * NOT be performed until they point to the same block.
+        	 * falseT be performed until they point to the same block.
         	 */
-         	if (seemore && Change == NO && retreat == NO &&
+         	if (seemore && Change == false && retreat == false &&
         		blockp > tmpblockp) {
-        			Change = YES;
+        			Change = true;
         			cp = blockp;
         	}
         	skiprefchar();
@@ -900,10 +900,10 @@ putsource(int seemore, FILE *output)
         }
         /* output a piece of the source line */
         putline(output);
-        if (retreat == YES) retreat = NO;
+        if (retreat == true) retreat = false;
     } while (blockp != NULL && getrefchar() != '\n');
     (void) putc('\n', output);
-    if (Change == YES) blockp = cp;
+    if (Change == true) blockp = cp;
 }
 
 /* put the rest of the cross-reference line into the file */
@@ -1038,16 +1038,16 @@ lcasify(char *s)
 /* HBB 2000/05/05: for consitency of calling interface between the
  * different 'find...()' functions, this now returns a char pointer,
  * too. Implemented as a pointer to static storage containing 'y' or
- * 'n', for the boolean result values YES and NO */
+ * 'n', for the boolean result values true and false */
 
 char *
 findcalledby(char *pattern)
 {
     char    file[PATHLEN + 1];	/* source file name */
     static char found_caller = 'n'; /* seen calling function? */
-    BOOL    macro = NO;
+    bool    macro = false;
 
-    if (invertedindex == YES) {
+    if (invertedindex == true) {
         POSTING	*p;
 
         findterm(pattern);
@@ -1081,7 +1081,7 @@ findcalledby(char *pattern)
         	if (fileversion < 10) {
         		break;
         	}
-        	macro = YES;
+        	macro = true;
         	/* FALLTHROUGH */
 
         case FCNDEF:
@@ -1117,7 +1117,7 @@ findterm(char *pattern)
         *s = '\0';
     }
     /* if letter case is to be ignored */
-    if (caseless == YES) {
+    if (caseless == true) {
 
         /* convert the prefix to upper case because it is lexically
            less than lower case */
@@ -1129,7 +1129,7 @@ findterm(char *pattern)
     }
     /* find the term lexically >= the prefix */
     (void) invfind(&invcontrol, prefix);
-    if (caseless == YES) {    /* restore lower case */
+    if (caseless == true) {    /* restore lower case */
         (void) strcpy(prefix, lcasify(prefix));
     }
     /* a null prefix matches the null term in the inverted index,
@@ -1141,14 +1141,14 @@ findterm(char *pattern)
     do {
         (void) invterm(&invcontrol, term);	/* get the term */
         s = term;
-        if (caseless == YES) {
+        if (caseless == true) {
         	s = lcasify(s);	/* make it lower case */
         }
         /* if it matches */
         if (regexec (&regexp, s, (size_t)0, NULL, 0) == 0) {
 
         	/* add its postings to the set */
-        	if ((postingp = boolfile(&invcontrol, &npostings, BOOL_OR)) == NULL) {
+        	if ((postingp = boolfile(&invcontrol, &npostings, bool_OR)) == NULL) {
         		break;
         	}
         }
@@ -1157,7 +1157,7 @@ findterm(char *pattern)
 
         	/* if ignoring letter case and the term is out of the
         	   range of possible matches */
-        	if (caseless == YES) {
+        	if (caseless == true) {
         		if (strncmp(term, prefix, len) > 0) {
         			break;	/* stop searching */
         		}
@@ -1250,7 +1250,7 @@ dbseek(long offset)
 }
 
 static void
-findcalledbysub(char *file, BOOL macro)
+findcalledbysub(char *file, bool macro)
 {
     /* find the next function call or the end of this function */
     while (scanpast('\t') != NULL) {
@@ -1280,8 +1280,8 @@ findcalledbysub(char *file, BOOL macro)
 
         case DEFINEEND:		/* #define end */
 
-        	if (invertedindex == NO) {
-        		if (macro == YES) {
+        	if (invertedindex == false) {
+        		if (macro == true) {
         			return;
         		}
         		break;	/* inside a function */
@@ -1290,7 +1290,7 @@ findcalledbysub(char *file, BOOL macro)
 
         case FCNDEF:		/* function end (pre 9.5) */
 
-        	if (invertedindex == NO) break;
+        	if (invertedindex == false) break;
         	/* FALLTHROUGH */
 
         case FCNEND:		/* function end */
diff --git a/src/fscanner.l b/src/fscanner.l
index 6be7a8f..7173bc0 100644
--- a/src/fscanner.l
+++ b/src/fscanner.l
@@ -18,11 +18,11 @@
  without specific prior written permission.
 
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
- IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT falseT LIMITED TO,
  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
+ PURPOSE ARE DISCLAIMED. IN false EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ CONSEQUENTIAL DAMAGES (INCLUDING, BUT falseT LIMITED TO, PROCUREMENT OF
  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  INTERRUPTION)
  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
@@ -50,7 +50,7 @@
 #endif
 
 #define	IFLEVELINC	5	/* #if nesting level size increment */
-#define YY_NO_TOP_STATE 1
+#define YY_false_TOP_STATE 1
 
 int	first;	/* buffer index for first char of symbol */
 int	last;	/* buffer index for last char of symbol */
@@ -63,32 +63,32 @@ int	myylineno = 1;
 size_t my_yyleng = 0;
 char *my_yytext = NULL;
 
-static	BOOL	arraydimension;		/* inside array dimension declaration */
-static	BOOL	bplisting;		/* breakpoint listing */
+static	bool	arraydimension;		/* inside array dimension declaration */
+static	bool	bplisting;		/* breakpoint listing */
 static	int	braces;			/* unmatched left brace count */
-static	BOOL	classdef;		/* c++ class definition */
-static	BOOL	elseelif;		/* #else or #elif found */
-static	BOOL	esudef;			/* enum/struct/union global definition */
-static	BOOL	external;		/* external definition */
+static	bool	classdef;		/* c++ class definition */
+static	bool	elseelif;		/* #else or #elif found */
+static	bool	esudef;			/* enum/struct/union global definition */
+static	bool	external;		/* external definition */
 static	int	externalbraces;		/* external definition outer brace count */
-static	BOOL	fcndef;			/* function definition */
-static	BOOL	global;			/* file global scope (outside functions) */
+static	bool	fcndef;			/* function definition */
+static	bool	global;			/* file global scope (outside functions) */
 static	size_t	iflevel;		/* #if nesting level */
-static	BOOL	initializer;		/* data initializer */
+static	bool	initializer;		/* data initializer */
 static	int	initializerbraces;	/* data initializer outer brace count */
-static	BOOL	lex;			/* lex file */
+static	bool	lex;			/* lex file */
 static	size_t	miflevel = IFLEVELINC;	/* maximum #if nesting level */
 static	int	*maxifbraces;		/* maximum brace count within #if */
 static	int	*preifbraces;		/* brace count before #if */
 static	int	parens;			/* unmatched left parenthesis count */
-static	BOOL	ppdefine;		/* preprocessor define statement */
-static	BOOL	pseudoelif;		/* pseudo-#elif */
-static	BOOL	oldtype;		/* next identifier is an old type */
-static	BOOL	rules;			/* lex/yacc rules */
-static	BOOL	sdl;			/* sdl file */
-static	BOOL	structfield;		/* structure field declaration */
+static	bool	ppdefine;		/* preprocessor define statement */
+static	bool	pseudoelif;		/* pseudo-#elif */
+static	bool	oldtype;		/* next identifier is an old type */
+static	bool	rules;			/* lex/yacc rules */
+static	bool	sdl;			/* sdl file */
+static	bool	structfield;		/* structure field declaration */
 static	int	tagdef;			/* class/enum/struct/union tag definition */
-static	BOOL	template;		/* function template */
+static	bool	template;		/* function template */
 static	int	templateparens;		/* function template outer parentheses count */
 static	int	typedefbraces = -1;	/* initial typedef brace count */
 static	int	token;			/* token found */
@@ -117,20 +117,20 @@ wsnl		[ \t\r\v\f\n]|{comment}
 %%
 
 %\{		{	/* lex/yacc C declarations/definitions */
-			global = YES;
+			global = true;
 			goto more;
-			/* NOTREACHED */
+			/* falseTREACHED */
 		}
 %\}		{
-			global = NO;
+			global = false;
 			goto more;
-			/* NOTREACHED */
+			/* falseTREACHED */
 		}
 ^%%		{	/* lex/yacc rules delimiter */
 			braces = 0;
-			if (rules == NO) {
+			if (rules == false) {
 				/* this %% starts the section containing the rules */
-				rules = YES;
+				rules = true;
 
 				/* Copy yytext to private buffer, to be able to add further
 				 * content following it: */
@@ -139,7 +139,7 @@ wsnl		[ \t\r\v\f\n]|{comment}
 				/* simulate a yylex() or yyparse() definition */
 				(void) strcat(my_yytext, " /* ");
 				first = strlen(my_yytext);
-				if (lex == YES) {
+				if (lex == true) {
 					(void) strcat(my_yytext, "yylex");
 				} else {
 					/* yacc: yyparse implicitly calls yylex */
@@ -156,25 +156,25 @@ wsnl		[ \t\r\v\f\n]|{comment}
 				return(FCNDEF);
 			} else {
 				/* were in the rules section, now comes the closing one */
-				rules = NO;
-				global = YES;
+				rules = false;
+				global = true;
 				last = first;
 				my_yymore();
 				return(FCNEND);
-				/* NOTREACHED */
+				/* falseTREACHED */
 			}
 		}
 
 <SDL>STATE[ \t]+({identifier}|\*)	{ /* sdl state, treat as function def */
 			braces = 1;
-			fcndef = YES;
+			fcndef = true;
 			token = FCNDEF;
 			goto findident;
-			/* NOTREACHED */
+			/* falseTREACHED */
 		}
 <SDL>ENDSTATE[ \t]	{ /* end of an sdl state, treat as end of a function */
 			goto endstate;
-			/* NOTREACHED */
+			/* falseTREACHED */
 		}
 
 \{		{	/* count unmatched left braces for fcn def detection */
@@ -184,7 +184,7 @@ wsnl		[ \t\r\v\f\n]|{comment}
 			   can be found */
 			if (tagdef) {
 				if (braces == 1) {
-					esudef = YES;
+					esudef = true;
 				}
 				token = tagdef;
 				tagdef = '\0';
@@ -193,15 +193,15 @@ wsnl		[ \t\r\v\f\n]|{comment}
 				return(token);
 			}
 			goto more;
-			/* NOTREACHED */
+			/* falseTREACHED */
 		}
 
 \#{ws}*	{ /* start a preprocessor line */
-			if (rules == NO)		/* don't consider CPP for lex/yacc rules */
+			if (rules == false)		/* don't consider CPP for lex/yacc rules */
 				BEGIN(IN_PREPROC);
 			yyleng = 1;	/* get rid of the blanks, if any */
 			goto more;
-			/* NOTREACHED */
+			/* falseTREACHED */
 		}
 <IN_PREPROC>endif([^a-zA-Z0-9_$\n].*)?	{	/* #endif */
 			/* delay treatment of #endif depending on whether an
@@ -210,7 +210,7 @@ wsnl		[ \t\r\v\f\n]|{comment}
 			 * after the #endif */
 			BEGIN(WAS_ENDIF);
 			goto more;
-			/* NOTREACHED */
+			/* falseTREACHED */
 		}
 <WAS_ENDIF>\n{wsnl}*#{ws}*if(ndef|def)?{ws}+		{
 			/* attempt to correct erroneous brace count caused by:
@@ -223,16 +223,16 @@ wsnl		[ \t\r\v\f\n]|{comment}
 			 * #endif
 			 */
 			/* the current #if must not have an #else or #elif */
-			if (elseelif == YES) {
+			if (elseelif == true) {
 				goto endif;
-				/* NOTREACHED */
+				/* falseTREACHED */
 			}
-			pseudoelif = YES;
+			pseudoelif = true;
 			BEGIN(INITIAL);
 			yyless(1);	/* rescan all but the line ending */
 			yy_set_bol(1);
 			goto eol;
-			/* NOTREACHED */
+			/* falseTREACHED */
 		}
 <WAS_ENDIF>\n{wsnl}*		 { 	/* an #endif with no #if right after it */
 		endif:
@@ -246,17 +246,17 @@ wsnl		[ \t\r\v\f\n]|{comment}
 			yyless(1);
 			yy_set_bol(1);
 			goto eol;
-			/* NOTREACHED */
+			/* falseTREACHED */
 		}
 
 <IN_PREPROC>ifndef{ws}+	|
 <IN_PREPROC>ifdef{ws}+		|
 <IN_PREPROC>if{ws}+		{ /* #if directive */
-			elseelif = NO;
-			if (pseudoelif == YES) {
-				pseudoelif = NO;
+			elseelif = false;
+			if (pseudoelif == true) {
+				pseudoelif = false;
 				goto elif;
-				/* NOTREACHED */
+				/* falseTREACHED */
 			}
 			/* make sure there is room for the current brace count */
 			if (iflevel == miflevel) {
@@ -269,10 +269,10 @@ wsnl		[ \t\r\v\f\n]|{comment}
 			maxifbraces[iflevel++] = 0;
 			BEGIN(INITIAL);
 			goto more;
-			/* NOTREACHED */
+			/* falseTREACHED */
 		}
 <IN_PREPROC>else({ws}.*)?	{ /* #else --- eat up whole line */
-			elseelif = YES;
+			elseelif = true;
 			if (iflevel > 0) {
 
 				/* save the maximum brace count for this #if */
@@ -284,10 +284,10 @@ wsnl		[ \t\r\v\f\n]|{comment}
 			}
 			BEGIN(INITIAL);
 			goto more;
-			/* NOTREACHED */
+			/* falseTREACHED */
 		}
 <IN_PREPROC>elif{ws}+	{ /* #elif */
-			/* elseelif = YES; --- HBB I doubt this is correct */
+			/* elseelif = true; --- HBB I doubt this is correct */
 		elif:
 			if (iflevel > 0) {
 
@@ -300,7 +300,7 @@ wsnl		[ \t\r\v\f\n]|{comment}
 			}
 			BEGIN(INITIAL);
 			goto more;
-			/* NOTREACHED */
+			/* falseTREACHED */
 		}
 
 <IN_PREPROC>include{ws}*\"[^"\n]+\" |
@@ -317,47 +317,47 @@ wsnl		[ \t\r\v\f\n]|{comment}
 			my_yytext[my_yyleng-1] = remember;
 			first = s - my_yytext;
 			last = my_yyleng - 1;
-			if (compress == YES) {
+			if (compress == true) {
 				my_yytext[0] = '\2';	/* compress the keyword */
 			}
 			BEGIN(INITIAL);
 			return(INCLUDE);
-			/* NOTREACHED */
+			/* falseTREACHED */
 		}
 
 \}		{
 			/* could be the last enum member initializer */
 			if (braces == initializerbraces) {
 				initializerbraces = -1;
-				initializer = NO;
+				initializer = false;
 			}
 			if (--braces <= 0) {
 		endstate:
 				braces = 0;
-				classdef = NO;
+				classdef = false;
 			}
-			if (braces == 0 || (braces == 1 && classdef == YES)) {
+			if (braces == 0 || (braces == 1 && classdef == true)) {
 
 				/* if the end of an enum/struct/union definition */
-				if (esudef == YES) {
-					esudef = NO;
+				if (esudef == true) {
+					esudef = false;
 				}
 				/* if the end of the function */
-				else if (fcndef == YES) {
-					fcndef = NO;
+				else if (fcndef == true) {
+					fcndef = false;
 					last = first;
 					my_yymore();
 					return(FCNEND);
 				}
 			}
 			goto more;
-			/* NOTREACHED */
+			/* falseTREACHED */
 		}
 
 \(		{	/* count unmatched left parentheses for function templates */
 			++parens;
 			goto more;
-			/* NOTREACHED */
+			/* falseTREACHED */
 		}
 \)		{
 			if (--parens <= 0) {
@@ -366,42 +366,42 @@ wsnl		[ \t\r\v\f\n]|{comment}
 			/* if the end of a function template */
 			if (parens == templateparens) {
 				templateparens = -1;
-				template = NO;
+				template = false;
 			}
 			goto more;
-			/* NOTREACHED */
+			/* falseTREACHED */
 		}
 =		{	/* if a global definition initializer */
 			if (!my_yytext)
 				return(LEXERR);
-			if (global == YES && ppdefine == NO && my_yytext[0] != '#') {
+			if (global == true && ppdefine == false && my_yytext[0] != '#') {
 				initializerbraces = braces;
-				initializer = YES;
+				initializer = true;
 			}
 			goto more;
-			/* NOTREACHED */
+			/* falseTREACHED */
 		}
 :		{	/* a if global structure field */
 			if (!my_yytext)
 				return(LEXERR);
-			if (global == YES && ppdefine == NO && my_yytext[0] != '#') {
-				structfield = YES;
+			if (global == true && ppdefine == false && my_yytext[0] != '#') {
+				structfield = true;
 			}
 			goto more;
-			/* NOTREACHED */
+			/* falseTREACHED */
 		}
 \,		{
 			if (braces == initializerbraces) {
 				initializerbraces = -1;
-				initializer = NO;
+				initializer = false;
 			}
-			structfield = NO;
+			structfield = false;
 			goto more;
-			/* NOTREACHED */
+			/* falseTREACHED */
 		}
 ;		{	/* if the enum/struct/union was not a definition */
 			if (braces == 0) {
-				esudef = NO;
+				esudef = false;
 			}
 			/* if the end of a typedef */
 			if (braces == typedefbraces) {
@@ -410,24 +410,24 @@ wsnl		[ \t\r\v\f\n]|{comment}
 			/* if the end of a external definition */
 			if (braces == externalbraces) {
 				externalbraces = -1;
-				external = NO;
+				external = false;
 			}
-			structfield = NO;
-			initializer = NO;
+			structfield = false;
+			initializer = false;
 			goto more;
-			/* NOTREACHED */
+			/* falseTREACHED */
 		}
 <IN_PREPROC>define{ws}+{identifier}	{
 
 			/* preprocessor macro or constant definition */
-			ppdefine = YES;
+			ppdefine = true;
 			token = DEFINE;
-			if (compress == YES) {
+			if (compress == true) {
 				my_yytext[0] = '\1';	/* compress the keyword */
 			}
 		findident:
 			/* search backwards through yytext[] to find the identifier */
-			/* NOTE: this had better be left to flex, by use of
+			/* falseTE: this had better be left to flex, by use of
 			 * yet another starting condition */
 			my_yymore();
 			first = my_yyleng - 1;
@@ -438,28 +438,28 @@ wsnl		[ \t\r\v\f\n]|{comment}
 			last = my_yyleng;
 			BEGIN(INITIAL);
 			goto definition;
-			/* NOTREACHED */
+			/* falseTREACHED */
 		}
 <IN_PREPROC>\n	{   /* unknown preprocessor line */
 			BEGIN(INITIAL);
                         ++myylineno;
 			goto more;
-			/* NOTREACHED */
+			/* falseTREACHED */
 		}
 <IN_PREPROC>.		 |
 <IN_PREPROC>{identifier}	{   /* unknown preprocessor line */
 			BEGIN(INITIAL);
 			goto more;
-			/* NOTREACHED */
+			/* falseTREACHED */
 		}
 
 class{wsnl}+{identifier}({wsnl}|{identifier}|[():])*\{	{	/* class definition */
-			classdef = YES;
+			classdef = true;
 			tagdef =  'c';
 			yyless(5);		/* eat up 'class', and re-scan */
 			yy_set_bol(0);
 			goto more;
-			/* NOTREACHED */
+			/* falseTREACHED */
 		}
 
 ("enum"|"struct"|"union")	{
@@ -477,7 +477,7 @@ class{wsnl}+{identifier}({wsnl}|{identifier}|[():])*\{	{	/* class definition */
 			tagdef = my_yytext[ident_start];
 			BEGIN(INITIAL);
 			if (braces == 0) {
-				esudef = YES;
+				esudef = true;
 			}
 			last = first;
 			yyless(0);  /* re-scan all this as normal text */
@@ -501,7 +501,7 @@ if{wsnl}*\(	{ 	/* ignore 'if' */
 			BEGIN(WAS_IDENTIFIER);
 			ident_start = first;
 			goto more;
-			/* NOTREACHED */
+			/* falseTREACHED */
 		}
 
 <WAS_IDENTIFIER>{
@@ -517,41 +517,41 @@ if{wsnl}*\(	{ 	/* ignore 'if' */
 			 * reason for the parsing bug concerning function pointer usage,
 			 * I suspect. --- I think my new special-case rule for 'if'
 			 * could be helpful in removing that limitation */
-			if ((braces == 0 && ppdefine == NO && my_yytext[0] != '#' && rules == NO) ||
-			    (braces == 1 && classdef == YES)) {
-				fcndef = YES;
+			if ((braces == 0 && ppdefine == false && my_yytext[0] != '#' && rules == false) ||
+			    (braces == 1 && classdef == true)) {
+				fcndef = true;
 				token = FCNDEF;
 				goto fcn;
-				/* NOTREACHED */
+				/* falseTREACHED */
 			}
 			goto fcncal;
-			/* NOTREACHED */
+			/* falseTREACHED */
 		}
 {ws}*\(([*&[\]=,.]|{identifier}|{number}|{wsnl})*		{ 	/* function call */
-		fcncal:	if (fcndef == YES || ppdefine == YES || rules == YES) {
+		fcncal:	if (fcndef == true || ppdefine == true || rules == true) {
 				token = FCNCALL;
 				goto fcn;
-				/* NOTREACHED */
+				/* falseTREACHED */
 			}
-			if (template == NO) {
+			if (template == false) {
 				templateparens = parens;
-				template = YES;
+				template = true;
 			}
 			goto ident;
-			/* NOTREACHED */
+			/* falseTREACHED */
 		}
 ("*"|{wsnl})+{identifier}		{	/* typedef name or modifier use */
 			goto ident;
-			/* NOTREACHED */
+			/* falseTREACHED */
 		}
 .|\n	{		/* general identifer usage */
 			char	*s;
 
-			if (global == YES && ppdefine == NO && my_yytext[0] != '#' &&
-			    external == NO && initializer == NO &&
-			    arraydimension == NO && structfield == NO &&
-			    template == NO && fcndef == NO) {
-				if (esudef == YES) {
+			if (global == true && ppdefine == false && my_yytext[0] != '#' &&
+			    external == false && initializer == false &&
+			    arraydimension == false && structfield == false &&
+			    template == false && fcndef == false) {
+				if (esudef == true) {
 					/* if enum/struct/union */
 					token = MEMBERDEF;
 				} else {
@@ -607,7 +607,7 @@ if{wsnl}*\(	{ 	/* ignore 'if' */
 				/* if the start of a typedef */
 				if (s == typedeftext) {
 					typedefbraces = braces;
-					oldtype = YES;
+					oldtype = true;
 				}
 				/* if an enum/struct/union */
 				/* (needed for "typedef struct tag name;" so
@@ -617,16 +617,16 @@ if{wsnl}*\(	{ 	/* ignore 'if' */
 				} else if (s == externtext) {
 					/* if an external definition */
 					externalbraces = braces;
-					external = YES;
-				} else if (templateparens == parens && template == YES) {
+					external = true;
+				} else if (templateparens == parens && template == true) {
 					/* keyword doesn't start a function
 					 * template */
 					templateparens = -1;
-					template = NO;
+					template = false;
 				} else {
 					/* identifier after typedef was a
 					 * keyword */
-					oldtype = NO;
+					oldtype = false;
 				}
 			} else {
 				/* not a keyword --> found an identifier */
@@ -638,42 +638,42 @@ if{wsnl}*\(	{ 	/* ignore 'if' */
 					token = tagdef;
 					tagdef = '\0';
 					if (braces == 0) {
-						esudef = YES;
+						esudef = true;
 					}
-				} else if (braces == typedefbraces && oldtype == NO &&
-				           arraydimension == NO) {
+				} else if (braces == typedefbraces && oldtype == false &&
+				           arraydimension == false) {
 					/* if a typedef name */
 					token = TYPEDEF;
 				} else {
-					oldtype = NO;
+					oldtype = false;
 				}
 				/* my_yymore(); */
 				return(token);
-				/* NOTREACHED */
+				/* falseTREACHED */
 			}
 		}
 }
 
 \[		{	/* array dimension (don't worry or about subscripts) */
-			arraydimension = YES;
+			arraydimension = true;
 			goto more;
-			/* NOTREACHED */
+			/* falseTREACHED */
 		}
 \]		{
-			arraydimension = NO;
+			arraydimension = false;
 			goto more;
-			/* NOTREACHED */
+			/* falseTREACHED */
 		}
 \\\n		{	/* preprocessor statement is continued on next line */
 			/* save the '\\' to the output file, but not the '\n': */
 			yyleng = 1;
 			my_yymore();
 			goto eol;
-			/* NOTREACHED */
+			/* falseTREACHED */
 		}
 \n		{	/* end of the line */
-			if (ppdefine == YES) {	/* end of a #define */
-				ppdefine = NO;
+			if (ppdefine == true) {	/* end of a #define */
+				ppdefine = false;
 				yyless(yyleng - 1);
 				last = first;
 				my_yymore();
@@ -681,7 +681,7 @@ if{wsnl}*\(	{ 	/* ignore 'if' */
 			}
 			/* skip the first 8 columns of a breakpoint listing line */
 			/* and skip the file path in the page header */
-			if (bplisting == YES) {
+			if (bplisting == true) {
 				int	c, i;
 
 				/* FIXME HBB 20001007: should call input() instead */
@@ -722,41 +722,41 @@ if{wsnl}*\(	{ 	/* ignore 'if' */
 		}
 
 \'		{	/* character constant */
-			if (sdl == NO)
+			if (sdl == false)
 				BEGIN(IN_SQUOTE);
 			goto more;
-			/* NOTREACHED */
+			/* falseTREACHED */
 		}
 <IN_SQUOTE>\'	{
 			BEGIN(INITIAL);
 			goto more;
-			/* NOTREACHED */
+			/* falseTREACHED */
 		}
 \"		{	/* string constant */
 			BEGIN(IN_DQUOTE);
 			goto more;
-			/* NOTREACHED */
+			/* falseTREACHED */
 		}
 <IN_DQUOTE>\"	{
 			BEGIN(INITIAL);
 			goto more;
-			/* NOTREACHED */
+			/* falseTREACHED */
 		}
 <IN_DQUOTE,IN_SQUOTE>{
 \n	  	{	/* syntax error: unexpected EOL */
 			BEGIN(INITIAL);
 			goto eol;
-			/* NOTREACHED */
+			/* falseTREACHED */
 		}
 \\.	|
 .		{
 			goto more;
-			/* NOTREACHED */
+			/* falseTREACHED */
 		}
 \\\n 	{		/* line continuation inside a string! */
 			myylineno++;
 			goto more;
-			/* NOTREACHED */
+			/* falseTREACHED */
 		}
 }
 
@@ -782,12 +782,12 @@ if{wsnl}*\(	{ 	/* ignore 'if' */
 "*"+[^*/\n]*	; /* do nothing */
 [^*\n]*\n		|
 "*"+[^*/\n]*\n	{
-			if (ppdefine == NO) {
+			if (ppdefine == false) {
 				goto eol;
 			} else {
 				++myylineno;
 			}
-			/* NOTREACHED */
+			/* falseTREACHED */
 		}
 "*"+"/"		{
 			/* replace the comment by a single blank */
@@ -799,7 +799,7 @@ if{wsnl}*\(	{ 	/* ignore 'if' */
 "//".*\n?		{
 			/* C++-style one-line comment */
 			goto eol;
-			/* NOTREACHED */
+			/* falseTREACHED */
 		}
 
 {number}				|	/* number */
@@ -825,29 +825,29 @@ initscanner(char *srcfile)
 	last = 0;		/* buffer index for last char of symbol */
 	lineno = 1;		/* symbol line number */
 	myylineno = 1;		/* input line number */
-	arraydimension = NO;	/* inside array dimension declaration */
-	bplisting = NO;		/* breakpoint listing */
+	arraydimension = false;	/* inside array dimension declaration */
+	bplisting = false;		/* breakpoint listing */
 	braces = 0;		/* unmatched left brace count */
-	classdef = NO;		/* c++ class definition */
-	elseelif = NO;		/* #else or #elif found */
-	esudef = NO;		/* enum/struct/union global definition */
-	external = NO;		/* external definition */
+	classdef = false;		/* c++ class definition */
+	elseelif = false;		/* #else or #elif found */
+	esudef = false;		/* enum/struct/union global definition */
+	external = false;		/* external definition */
 	externalbraces = -1;	/* external definition outer brace count */
-	fcndef = NO;		/* function definition */
-	global = YES;		/* file global scope (outside functions) */
+	fcndef = false;		/* function definition */
+	global = true;		/* file global scope (outside functions) */
 	iflevel = 0;		/* #if nesting level */
-	initializer = NO;	/* data initializer */
+	initializer = false;	/* data initializer */
 	initializerbraces = -1;	/* data initializer outer brace count */
-	lex = NO;		/* lex file */
+	lex = false;		/* lex file */
 	parens = 0;		/* unmatched left parenthesis count */
-	ppdefine = NO;		/* preprocessor define statement */
-	pseudoelif = NO;	/* pseudo-#elif */
-	oldtype = NO;		/* next identifier is an old type */
-	rules = NO;		/* lex/yacc rules */
-	sdl = NO;		/* sdl file */
-	structfield = NO;	/* structure field declaration */
+	ppdefine = false;		/* preprocessor define statement */
+	pseudoelif = false;	/* pseudo-#elif */
+	oldtype = false;		/* next identifier is an old type */
+	rules = false;		/* lex/yacc rules */
+	sdl = false;		/* sdl file */
+	structfield = false;	/* structure field declaration */
 	tagdef = '\0';		/* class/enum/struct/union tag definition */
-	template = NO;		/* function template */
+	template = false;		/* function template */
 	templateparens = -1;	/* function template outer parentheses count */
 	typedefbraces = -1;	/* initial typedef braces count */
 	ident_start = 0;	/* start of previously found identifier */
@@ -863,24 +863,24 @@ initscanner(char *srcfile)
 		switch (*++s) {	/* this switch saves time on C files */
 		case 'b':
 			if (strcmp(s, "bp") == 0) {	/* breakpoint listing */
-				bplisting = YES;
+				bplisting = true;
 			}
 			break;
 		case 'l':
 			if (strcmp(s, "l") == 0) {	/* lex */
-				lex = YES;
-				global = NO;
+				lex = true;
+				global = false;
 			}
 			break;
 		case 's':
 			if (strcmp(s, "sd") == 0) {	/* sdl */
-				sdl = YES;
+				sdl = true;
 				BEGIN(SDL);
 			}
 			break;
 		case 'y':
 			if (strcmp(s, "y") == 0) {	/* yacc */
-				global = NO;
+				global = false;
 			}
 			break;
 		}
diff --git a/src/global.h b/src/global.h
index 60ee836..2d653cf 100644
--- a/src/global.h
+++ b/src/global.h
@@ -17,11 +17,11 @@
  without specific prior written permission.
 
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
- IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT falseT LIMITED TO,
  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
+ PURPOSE ARE DISCLAIMED. IN false EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ CONSEQUENTIAL DAMAGES (INCLUDING, BUT falseT LIMITED TO, PROCUREMENT OF
  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  INTERRUPTION)
  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
@@ -58,14 +58,11 @@ typedef void (*sighandler_t)(int);
 
 #include <fcntl.h>
 
-typedef    enum    {		/* boolean data type */
-    NO,
-    YES
-} BOOL;
+#include <stdbool.h>
 
 typedef    enum    {		/* findinit return code */
-    NOERROR,
-    NOTSYMBOL,
+    falseERROR,
+    falseTSYMBOL,
     REGCMPERROR
 } FINDINIT;
 
@@ -85,20 +82,17 @@ struct cmd {        	/* command history struct */
 };
 
 enum {
-    CH_NONE   = 0x0000,
+    CH_falseNE   = 0x0000,
     CH_RESULT = 0x0001 << 0,
     CH_INPUT  = 0x0001 << 1,
     CH_MODE   = 0x0001 << 2,
     CH_ALL    = CH_RESULT | CH_INPUT | CH_MODE
 };
 
-
-
 #ifndef DFLT_INCDIR
 # define DFLT_INCDIR "/usr/include"
 #endif
 
-
 /* digraph data for text compression */
 extern    char    dichar1[];	/* 16 most frequent first chars */
 extern    char    dichar2[];	/* 8 most frequent second chars
@@ -118,46 +112,46 @@ extern    char    dicode2[];	/* digraph second character code */
 /* main.c global data */
 extern    char    *editor, *home, *shell, *lineflag;	/* environment variables */
 extern    char    *home;		/* Home directory */
-extern     BOOL    lineflagafterfile;
+extern     bool    lineflagafterfile;
 extern    char    *argv0;		/* command name */
-extern    BOOL    compress;	/* compress the characters in the crossref */
-extern    BOOL    dbtruncated;	/* database symbols truncated to 8 chars */
+extern    bool    compress;	/* compress the characters in the crossref */
+extern    bool    dbtruncated;	/* database symbols truncated to 8 chars */
 extern    int    dispcomponents;	/* file path components to display */
 #if CCS
-extern    BOOL    displayversion;	/* display the C Compilation System version */
+extern    bool    displayversion;	/* display the C Compilation System version */
 #endif
-extern    BOOL    editallprompt;	/* prompt between editing files */
+extern    bool    editallprompt;	/* prompt between editing files */
 extern    unsigned int fileargc;    /* file argument count */
 extern    char    **fileargv;	/* file argument values */
 extern    int    fileversion;	/* cross-reference file version */
-extern    BOOL    incurses;	/* in curses */
-extern    BOOL    invertedindex;	/* the database has an inverted index */
-extern    BOOL    isuptodate;	/* consider the crossref up-to-date */
-extern    BOOL    kernelmode;	/* don't use DFLT_INCDIR - bad for kernels */
-extern    BOOL    linemode;	/* use line oriented user interface */
-extern    BOOL    verbosemode;	/* print extra information on line mode */
-extern    BOOL    recurse_dir;	/* recurse dirs when searching for src files */
+extern    bool    incurses;	/* in curses */
+extern    bool    invertedindex;	/* the database has an inverted index */
+extern    bool    isuptodate;	/* consider the crossref up-to-date */
+extern    bool    kernelmode;	/* don't use DFLT_INCDIR - bad for kernels */
+extern    bool    linemode;	/* use line oriented user interface */
+extern    bool    verbosemode;	/* print extra information on line mode */
+extern    bool    recurse_dir;	/* recurse dirs when searching for src files */
 extern    char    *namefile;	/* file of file names */
-extern    BOOL    ogs;		/* display OGS book and subsystem names */
+extern    bool    ogs;		/* display OGS book and subsystem names */
 extern    char    *prependpath;	/* prepend path to file names */
 extern    FILE    *refsfound;	/* references found file */
 extern    char    temp1[];	/* temporary file name */
 extern    char    temp2[];	/* temporary file name */
 extern    long    totalterms;	/* total inverted index terms */
-extern    BOOL    trun_syms;	/* truncate symbols to 8 characters */
+extern    bool    trun_syms;	/* truncate symbols to 8 characters */
 extern    char    tempstring[TEMPSTRING_LEN + 1]; /* global dummy string buffer */
 extern    char    *tmpdir;	/* temporary directory */
 
 /* command.c global data */
-extern    BOOL    caseless;	/* ignore letter case when searching */
-extern    BOOL    *change;	/* change this line */
-extern    BOOL    changing;	/* changing text */
+extern    bool    caseless;	/* ignore letter case when searching */
+extern    bool    *change;	/* change this line */
+extern    bool    changing;	/* changing text */
 extern    unsigned int curdispline;
 extern    char    newpat[];	/* new pattern */
 
 /* crossref.c global data */
 extern    long    dboffset;	/* new database offset */
-extern    BOOL    errorsfound;	/* prompt before clearing error messages */
+extern    bool    errorsfound;	/* prompt before clearing error messages */
 extern    long    lineoffset;	/* source line database offset */
 extern    long    npostings;	/* number of postings */
 extern    unsigned long symbols;    /* number of symbols */
@@ -206,7 +200,7 @@ extern    struct    keystruct {
 } keyword[];
 
 /* mouse.c global data */
-extern    BOOL    mouse;		/* mouse interface */
+extern    bool    mouse;		/* mouse interface */
 
 /* readline.c global data */
 extern char* rl_line_buffer;
@@ -214,7 +208,7 @@ extern char input_line[PATLEN + 1];
 extern int rl_point;
 
 #if UNIXPC
-extern    BOOL    unixpcmouse;		/* UNIX PC mouse interface */
+extern    bool    unixpcmouse;		/* UNIX PC mouse interface */
 #endif
 
 /* cscope functions called from more than one function or between files */
@@ -240,12 +234,12 @@ char ** parse_options(int *argc, char **argv);
 void    error_usage(void);
 void    longusage(void);
 void    usage(void);
-extern BOOL    remove_symfile_onexit;
-extern BOOL    onesearch;    	/* one search only in line mode */
+extern bool    remove_symfile_onexit;
+extern bool    onesearch;    	/* one search only in line mode */
 extern char    *reflines;    	/* symbol reference lines file */
 void verswp_field(void);
 void horswp_field(void);
-BOOL interpret(int c);    // XXX: probably rename
+bool interpret(int c);    // XXX: probably rename
 int handle_input(const char c);
 
 void    rlinit(void);
@@ -301,10 +295,10 @@ void    myungetch(int c);
 void    warning(char *text);
 void    writestring(char *s);
 
-BOOL    infilelist(char *file);
-BOOL    readrefs(char *filename);
-BOOL    search(void);
-BOOL    writerefsfound(void);
+bool    infilelist(char *file);
+bool    readrefs(char *filename);
+bool    search(void);
+bool    writerefsfound(void);
 
 FINDINIT findinit(char *pattern);
 MOUSE    *getmouseaction(char leading_char);
@@ -313,7 +307,7 @@ struct    cmd *prevcmd(void);
 struct    cmd *nextcmd(void);
 
 int    egrep(char *file, FILE *output, char *format);
-int    mygetline(char p[], char s[], unsigned size, int firstchar, BOOL iscaseless);
+int    mygetline(char p[], char s[], unsigned size, int firstchar, bool iscaseless);
 int    mygetch(void);
 int    hash(char *ss);
 int    execute(char *a, ...);
diff --git a/src/help.c b/src/help.c
index b515ad4..164f31b 100644
--- a/src/help.c
+++ b/src/help.c
@@ -17,11 +17,11 @@
  without specific prior written permission.
 
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
- IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT falseT LIMITED TO,
  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
+ PURPOSE ARE DISCLAIMED. IN false EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ CONSEQUENTIAL DAMAGES (INCLUDING, BUT falseT LIMITED TO, PROCUREMENT OF
  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  INTERRUPTION)
  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
@@ -55,7 +55,7 @@ help(void)
     int    ln;
 
     tp = text;
-    if (changing == NO) {
+    if (changing == false) {
         if (mouse) {
         	*tp++ = "Point with the mouse and click button 1 to move to the desired input field,\n";
         	*tp++ = "type the pattern to search for, and then press the RETURN key.  For the first 4\n";
@@ -91,7 +91,7 @@ help(void)
         *tp++ = "^B\t\tRecall previous input field and search pattern.\n";
         *tp++ = "^F\t\tRecall next input field and search pattern.\n";
         if(caseless)
-        	*tp++ = "^C\t\tToggle ignore/use letter case when searching (IGNORE).\n";
+        	*tp++ = "^C\t\tToggle ignore/use letter case when searching (IGfalseRE).\n";
         else
         	*tp++ = "^C\t\tToggle ignore/use letter case when searching (USE).\n";
         *tp++ = "^R\t\tRebuild the cross-reference.\n";
diff --git a/src/history.c b/src/history.c
index 69018e6..bf24a21 100644
--- a/src/history.c
+++ b/src/history.c
@@ -17,11 +17,11 @@
  without specific prior written permission.
 
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
- IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT falseT LIMITED TO,
  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
+ PURPOSE ARE DISCLAIMED. IN false EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ CONSEQUENTIAL DAMAGES (INCLUDING, BUT falseT LIMITED TO, PROCUREMENT OF
  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  INTERRUPTION)
  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
diff --git a/src/input.c b/src/input.c
index 324a0c2..980a3a0 100644
--- a/src/input.c
+++ b/src/input.c
@@ -17,11 +17,11 @@
  without specific prior written permission.
 
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
- IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT falseT LIMITED TO,
  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
+ PURPOSE ARE DISCLAIMED. IN false EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ CONSEQUENTIAL DAMAGES (INCLUDING, BUT falseT LIMITED TO, PROCUREMENT OF
  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  INTERRUPTION)
  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
@@ -104,7 +104,7 @@ mygetch(void)
 
 /* get a line from the terminal in non-canonical mode */
 int
-mygetline(char p[], char s[], unsigned size, int firstchar, BOOL iscaseless)
+mygetline(char p[], char s[], unsigned size, int firstchar, bool iscaseless)
 {
     int    c;
     unsigned int i = 0, j;
@@ -126,7 +126,7 @@ mygetline(char p[], char s[], unsigned size, int firstchar, BOOL iscaseless)
     i += strlen(p);
     /* if a character already has been typed */
     if (firstchar != '\0') {
-    if(iscaseless == YES) {
+    if(iscaseless == true) {
         firstchar = tolower(firstchar);
     }
     addch(firstchar);    /* display it */
@@ -193,7 +193,7 @@ mygetline(char p[], char s[], unsigned size, int firstchar, BOOL iscaseless)
         i = 0;
     } else if (isprint(c) || c == '\t') {
         /* printable */
-        if(iscaseless == YES) {
+        if(iscaseless == true) {
         c = tolower(c);
         }
         /* if it will fit on the line */
@@ -207,10 +207,10 @@ mygetline(char p[], char s[], unsigned size, int firstchar, BOOL iscaseless)
         }
         }
 #if UNIXPC
-    } else if (unixpcmouse == YES && c == ESC) {    /* mouse */
+    } else if (unixpcmouse == true && c == ESC) {    /* mouse */
         getmouseaction(ESC);    /* ignore it */
 #endif
-    } else if (mouse == YES && c == ctrl('X')) {
+    } else if (mouse == true && c == ctrl('X')) {
         getmouseaction(ctrl('X'));    /* ignore it */
     } else if (c == EOF) {                /* end-of-file */
         break;
@@ -251,7 +251,7 @@ askforreturn(void)
     fprintf(stderr, "Press the RETURN key to continue: ");
     getchar();
     /* HBB 20060419: message probably messed up the screen --- redraw */
-    if (incurses == YES) {
+    if (incurses == true) {
     redrawwin(curscr);
     }
 }
diff --git a/src/invlib.c b/src/invlib.c
index 208ae11..c00b78d 100644
--- a/src/invlib.c
+++ b/src/invlib.c
@@ -17,11 +17,11 @@
  without specific prior written permission.
 
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
- IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT falseT LIMITED TO,
  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
+ PURPOSE ARE DISCLAIMED. IN false EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ CONSEQUENTIAL DAMAGES (INCLUDING, BUT falseT LIMITED TO, PROCUREMENT OF
  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  INTERRUPTION)
  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
@@ -940,8 +940,8 @@ boolfile(INVCONTROL *invcntl, long *num, int boolarg)
     ptr2 = ((unsigned long *) ptr) + (entryptr->size + (sizeof(long) - 1)) / sizeof(long);
     *num = entryptr->post;
     switch (boolarg) {
-    case BOOL_OR:
-    case NOT:
+    case bool_OR:
+    case falseT:
         if (*num == 0) {
         	*num = numitems;
         	return(item);
@@ -951,14 +951,14 @@ boolfile(INVCONTROL *invcntl, long *num, int boolarg)
     u = 0;
     switch (boolarg) {
     case AND:
-    case NOT:
+    case falseT:
         newsetp = item;
         break;
 
-    case BOOL_OR:
+    case bool_OR:
         u = enditem - item;
         /* FALLTHROUGH */
-    case REVERSENOT:
+    case REVERSEfalseT:
         u += *num;
         if (item == item2) {
         	if (u > setsize1) {
@@ -996,7 +996,7 @@ boolfile(INVCONTROL *invcntl, long *num, int boolarg)
     fread(&posting, sizeof(posting), 1, file);
     newsetc = 0;
     switch (boolarg) {
-    case BOOL_OR:
+    case bool_OR:
         /* while something in both sets */
         set1p = item;
         newsetp = newitem;
@@ -1041,7 +1041,7 @@ boolfile(INVCONTROL *invcntl, long *num, int boolarg)
         	}
         }
         item = newitem;
-        break; /* end of BOOL_OR */
+        break; /* end of bool_OR */
 #if 0
     case AND:
         for (set1c = 0, set2c = 0; set1c < numitems && set2c < *num; ) {
@@ -1071,7 +1071,7 @@ boolfile(INVCONTROL *invcntl, long *num, int boolarg)
         }
         break; /* end of AND */
 
-    case NOT:
+    case falseT:
         for (set1c = 0, set2c = 0; set1c < numitems && set2c < *num; ) {
         	if (set1p->lineoffset < posting.lineoffset) {
         		*newsetp++ = *set1p++;
@@ -1102,9 +1102,9 @@ boolfile(INVCONTROL *invcntl, long *num, int boolarg)
         while (set1c++ < numitems) {
         	*newsetp++ = *set1p++;
         }
-        break; /* end of NOT */
+        break; /* end of falseT */
 
-    case REVERSENOT:  /* core NOT incoming set */
+    case REVERSEfalseT:  /* core falseT incoming set */
         for (set1c = 0, set2c = 0; set1c < numitems && set2c < *num; ) {
         	if (set1p->lineoffset < posting.lineoffset) {
         		set1p++;
@@ -1137,7 +1137,7 @@ boolfile(INVCONTROL *invcntl, long *num, int boolarg)
         	fread(&posting, (int) sizeof(posting), 1, file);
         }
         item = newitem;
-        break; /* end of REVERSENOT  */
+        break; /* end of REVERSEfalseT  */
 #endif
     }
     numitems = newsetc;
diff --git a/src/invlib.h b/src/invlib.h
index 75e5986..e525d0a 100644
--- a/src/invlib.h
+++ b/src/invlib.h
@@ -17,11 +17,11 @@
  without specific prior written permission.
 
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
- IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT falseT LIMITED TO,
  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
+ PURPOSE ARE DISCLAIMED. IN false EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ CONSEQUENTIAL DAMAGES (INCLUDING, BUT falseT LIMITED TO, PROCUREMENT OF
  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  INTERRUPTION)
  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
@@ -57,10 +57,10 @@
 #define INVALONE    2
 
 /* boolean set operations */
-#define    BOOL_OR    	3
+#define    bool_OR    	3
 #define    AND    	4
-#define    NOT    	5
-#define    REVERSENOT    6
+#define    falseT    	5
+#define    REVERSEfalseT    6
 
 /* note that the entire first block is for parameters */
 typedef    struct    {
diff --git a/src/library.h b/src/library.h
index 740aca2..b08a65f 100644
--- a/src/library.h
+++ b/src/library.h
@@ -17,11 +17,11 @@
  without specific prior written permission.
 
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
- IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT falseT LIMITED TO,
  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
+ PURPOSE ARE DISCLAIMED. IN false EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ CONSEQUENTIAL DAMAGES (INCLUDING, BUT falseT LIMITED TO, PROCUREMENT OF
  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  INTERRUPTION)
  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
diff --git a/src/logdir.c b/src/logdir.c
index 7bb492f..3455f47 100644
--- a/src/logdir.c
+++ b/src/logdir.c
@@ -17,11 +17,11 @@
  without specific prior written permission.
 
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
- IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT falseT LIMITED TO,
  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
+ PURPOSE ARE DISCLAIMED. IN false EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ CONSEQUENTIAL DAMAGES (INCLUDING, BUT falseT LIMITED TO, PROCUREMENT OF
  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  INTERRUPTION)
  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
diff --git a/src/lookup.c b/src/lookup.c
index c2453a0..f65a6f8 100644
--- a/src/lookup.c
+++ b/src/lookup.c
@@ -17,11 +17,11 @@
  without specific prior written permission.
 
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
- IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT falseT LIMITED TO,
  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
+ PURPOSE ARE DISCLAIMED. IN false EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ CONSEQUENTIAL DAMAGES (INCLUDING, BUT falseT LIMITED TO, PROCUREMENT OF
  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  INTERRUPTION)
  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
@@ -126,7 +126,7 @@ lookup(char *ident)
     /* look up the identifier in the keyword table */
     for (p = hashtab[hash(ident) % HASHMOD]; p != NULL; p = p->next) {
         if (strequal(ident, p->text)) {
-        	if (compress == YES && (c = p - keyword) < ' ') {
+        	if (compress == true && (c = p - keyword) < ' ') {
         		ident[0] = c;	/* compress the keyword */
         	}
         	return(p->text);
diff --git a/src/lookup.h b/src/lookup.h
index 180347e..60d3c61 100644
--- a/src/lookup.h
+++ b/src/lookup.h
@@ -17,11 +17,11 @@
  without specific prior written permission.
 
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
- IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT falseT LIMITED TO,
  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
+ PURPOSE ARE DISCLAIMED. IN false EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ CONSEQUENTIAL DAMAGES (INCLUDING, BUT falseT LIMITED TO, PROCUREMENT OF
  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  INTERRUPTION)
  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
diff --git a/src/main.c b/src/main.c
index 66a4738..6283d97 100644
--- a/src/main.c
+++ b/src/main.c
@@ -17,11 +17,11 @@
  without specific prior written permission.
 
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
- IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT falseT LIMITED TO,
  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
+ PURPOSE ARE DISCLAIMED. IN false EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ CONSEQUENTIAL DAMAGES (INCLUDING, BUT falseT LIMITED TO, PROCUREMENT OF
  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  INTERRUPTION)
  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
@@ -67,34 +67,34 @@ char    dicode2[256];    	/* digraph second character code */
 
 char    *editor, *shell, *lineflag;    /* environment variables */
 char    *home;    		/* Home directory */
-BOOL    lineflagafterfile;
+bool    lineflagafterfile;
 char    *argv0;    		/* command name */
-BOOL    compress = YES;    	/* compress the characters in the crossref */
-BOOL    dbtruncated;    	/* database symbols are truncated to 8 chars */
+bool    compress = true;    	/* compress the characters in the crossref */
+bool    dbtruncated;    	/* database symbols are truncated to 8 chars */
 int    dispcomponents = 1;    /* file path components to display */
 #if CCS
-BOOL    displayversion;    	/* display the C Compilation System version */
+bool    displayversion;    	/* display the C Compilation System version */
 #endif
-BOOL    editallprompt = YES;    /* prompt between editing files */
+bool    editallprompt = true;    /* prompt between editing files */
 unsigned int fileargc;        /* file argument count */
 char    **fileargv;    	/* file argument values */
 int    fileversion;    	/* cross-reference file version */
-BOOL    incurses = NO;    	/* in curses */
-BOOL    invertedindex;    	/* the database has an inverted index */
-BOOL    isuptodate;    	/* consider the crossref up-to-date */
-BOOL    kernelmode;    	/* don't use DFLT_INCDIR - bad for kernels */
-BOOL    linemode = NO;    	/* use line oriented user interface */
-BOOL    verbosemode = NO;    /* print extra information on line mode */
-BOOL    recurse_dir = NO;    /* recurse dirs when searching for src files */
+bool    incurses = false;    	/* in curses */
+bool    invertedindex;    	/* the database has an inverted index */
+bool    isuptodate;    	/* consider the crossref up-to-date */
+bool    kernelmode;    	/* don't use DFLT_INCDIR - bad for kernels */
+bool    linemode = false;    	/* use line oriented user interface */
+bool    verbosemode = false;    /* print extra information on line mode */
+bool    recurse_dir = false;    /* recurse dirs when searching for src files */
 char    *namefile;    	/* file of file names */
-BOOL    ogs = NO;    		/* display OGS book and subsystem names */
+bool    ogs = false;    		/* display OGS book and subsystem names */
 char    *prependpath;    	/* prepend path to file names */
 FILE    *refsfound;    	/* references found file */
 char    temp1[PATHLEN + 1];    /* temporary file name */
 char    temp2[PATHLEN + 1];    /* temporary file name */
 char    tempdirpv[PATHLEN + 1];    /* private temp directory */
 long    totalterms;    	/* total inverted index terms */
-BOOL    trun_syms;    	/* truncate symbols to 8 characters */
+bool    trun_syms;    	/* truncate symbols to 8 characters */
 char    tempstring[TEMPSTRING_LEN + 1]; /* use this as a buffer, instead of 'yytext',
         		 * which had better be left alone */
 char    *tmpdir;    	/* temporary directory */
@@ -112,7 +112,7 @@ static inline    void    screenmode_event_loop(void);
 void
 sigwinch_handler(int sig, siginfo_t *info, void *unused)
 {
-    if(incurses == YES){
+    if(incurses == true){
         ungetch(KEY_RESIZE);
     }
 }
@@ -140,7 +140,7 @@ siginit(void){
      */
     signal(SIGPIPE, SIG_IGN);
 
-    if (linemode == NO) {
+    if (linemode == false) {
     signal(SIGINT, SIG_IGN);    /* ignore interrupts */
 #if defined(KEY_RESIZE) && !defined(__DJGPP__)
     struct sigaction winch_action;
@@ -180,7 +180,7 @@ initcompress(void)
 {
     int    i;
 
-    if (compress == YES) {
+    if (compress == true) {
     for (i = 0; i < 16; ++i) {
         dicode1[(unsigned char) (dichar1[i])] = i * 8 + 1;
     }
@@ -199,12 +199,12 @@ skiplist(FILE *oldrefs)
 
     if (fscanf(oldrefs, "%d", &i) != 1) {
     postfatal("cscope: cannot read list size from file %s\n", reffile);
-    /* NOTREACHED */
+    /* falseTREACHED */
     }
     while (--i >= 0) {
     if (fscanf(oldrefs, "%*s") != 0) {
         postfatal("cscope: cannot read list name from file %s\n", reffile);
-        /* NOTREACHED */
+        /* falseTREACHED */
     }
     }
 }
@@ -214,7 +214,7 @@ skiplist(FILE *oldrefs)
 void
 entercurses(void)
 {
-    incurses = YES;
+    incurses = true;
 #ifndef __MSDOS__ /* HBB 20010313 */
     nonl();            /* don't translate an output \n to \n\r */
 #endif
@@ -237,7 +237,7 @@ exitcurses(void)
 
     /* exit curses and restore the terminal modes */
     endwin();
-    incurses = NO;
+    incurses = false;
 
     /* restore the mouse */
     mousecleanup();
@@ -260,7 +260,7 @@ myexit(int sig)
         rmdir(tempdirpv);
     }
     /* restore the terminal to its original mode */
-    if (incurses == YES) {
+    if (incurses == true) {
         exitcurses();
     }
     /* dump core for debugging on the quit signal */
@@ -274,7 +274,7 @@ myexit(int sig)
     freecrossref();
     free_newbuildfiles();
 
-    if( remove_symfile_onexit == YES ) {
+    if( remove_symfile_onexit == true ) {
         unlink( reffile );
         unlink( invname );
         unlink( invpost );
@@ -298,10 +298,10 @@ static inline    void    linemode_event_loop(void){
     int c;
 
     if (*input_line != '\0') {    	/* do any optional search */
-        if (search() == YES) {
+        if (search() == true) {
         /* print the total number of lines in
          * verbose mode */
-        if (verbosemode == YES)
+        if (verbosemode == true)
             printf("cscope: %d lines\n",
         	   totallines);
 
@@ -309,9 +309,9 @@ static inline    void    linemode_event_loop(void){
             putchar(c);
         }
     }
-    if (onesearch == YES) {
+    if (onesearch == true) {
         myexit(0);
-        /* NOTREACHED */
+        /* falseTREACHED */
     }
 
     for (char *s;;) {
@@ -339,7 +339,7 @@ static inline    void    linemode_event_loop(void){
         case '9':    /* samuel only */
         field = *buf - '0';
         strcpy(input_line, buf + 1);
-        if (search() == NO) {
+        if (search() == false) {
         	printf("Unable to search database\n");
         } else {
         	printf("cscope: %d lines\n", totallines);
@@ -351,10 +351,10 @@ static inline    void    linemode_event_loop(void){
 
         case 'c':    /* toggle caseless mode */
         case ctrl('C'):
-        if (caseless == NO) {
-            caseless = YES;
+        if (caseless == false) {
+            caseless = true;
         } else {
-            caseless = NO;
+            caseless = false;
         }
         egrepcaseless(caseless);
         break;
@@ -377,7 +377,7 @@ static inline    void    linemode_event_loop(void){
 
         case 'F':    /* add a file name */
         strcpy(path, buf + 1);
-        if (infilelist(path) == NO &&
+        if (infilelist(path) == false &&
             (s = inviewpath(path)) != NULL) {
             addsrcfile(s);
         }
@@ -429,7 +429,7 @@ main(int argc, char **argv)
     /* XXX remove if/when clearerr() in dir.c does the right thing. */
     if (namefile && strcmp(namefile, "-") == 0 && !buildonly) {
     postfatal("cscope: Must use -b if file list comes from stdin\n");
-    /* NOTREACHED */
+    /* falseTREACHED */
     }
 
     /* make sure that tmpdir exists */
@@ -468,7 +468,7 @@ main(int argc, char **argv)
      * the home directory
      */
     snprintf(path, sizeof(path), "%s/%s", home, reffile);
-    if (isuptodate == NO || access(path, READ) == 0) {
+    if (isuptodate == false || access(path, READ) == 0) {
         reffile = strdup(path);
         snprintf(path, sizeof(path), "%s/%s", home, invname);
         invname = strdup(path);
@@ -479,7 +479,7 @@ main(int argc, char **argv)
 
     siginit();
 
-    if (linemode == NO) {
+    if (linemode == false) {
         dispinit();	/* initialize display parameters */
         clearmsg();	/* clear any build progress message */
         display();	/* display the version number and input fields */
@@ -487,22 +487,22 @@ main(int argc, char **argv)
 
 
     /* if the cross-reference is to be considered up-to-date */
-    if (isuptodate == YES) {
+    if (isuptodate == true) {
     if ((oldrefs = vpfopen(reffile, "rb")) == NULL) {
         postfatal("cscope: cannot open file %s\n", reffile);
-        /* NOTREACHED */
+        /* falseTREACHED */
     }
     /* get the crossref file version but skip the current directory */
     if (fscanf(oldrefs, "cscope %d %*s", &fileversion) != 1) {
         postfatal("cscope: cannot read file version from file %s\n",
               reffile);
-        /* NOTREACHED */
+        /* falseTREACHED */
     }
     if (fileversion >= 8) {
 
         /* override these command line options */
-        compress = YES;
-        invertedindex = NO;
+        compress = true;
+        invertedindex = false;
 
         /* see if there are options in the database */
         for (int c;;) {
@@ -513,15 +513,15 @@ main(int argc, char **argv)
         }
         switch (getc(oldrefs)) {
         case 'c':	/* ASCII characters only */
-            compress = NO;
+            compress = false;
             break;
         case 'q':	/* quick search */
-            invertedindex = YES;
+            invertedindex = true;
             fscanf(oldrefs, "%ld", &totalterms);
             break;
         case 'T':	/* truncate symbols to 8 characters */
-            dbtruncated = YES;
-            trun_syms = YES;
+            dbtruncated = true;
+            trun_syms = true;
             break;
         }
         }
@@ -537,7 +537,7 @@ main(int argc, char **argv)
         postfatal(
         	"cscope: cannot read source file size from file %s\n",
         	reffile);
-        /* NOTREACHED */
+        /* falseTREACHED */
     }
     /* get the source file list */
     srcfiles = malloc(nsrcfiles * sizeof(*srcfiles));
@@ -548,7 +548,7 @@ main(int argc, char **argv)
         postfatal(
         	"cscope: cannot read string space size from file %s\n",
         	reffile);
-        /* NOTREACHED */
+        /* falseTREACHED */
         }
         s = malloc(oldnum);
         getc(oldrefs);    /* skip the newline */
@@ -558,7 +558,7 @@ main(int argc, char **argv)
         postfatal(
         	"cscope: cannot read source file names from file %s\n",
         	reffile);
-        /* NOTREACHED */
+        /* falseTREACHED */
         }
         /* change newlines to nulls */
         for (i = 0; i < nsrcfiles; ++i) {
@@ -598,7 +598,7 @@ main(int argc, char **argv)
             postfatal(
         		"cscope: cannot read source file name from file %s\n",
         	      reffile);
-            /* NOTREACHED */
+            /* falseTREACHED */
         }
         srcfiles[i] = strdup(path);
         }
@@ -618,7 +618,7 @@ main(int argc, char **argv)
     makefilelist();
     if (nsrcfiles == 0) {
         postfatal("cscope: no source files found\n");
-        /* NOTREACHED */
+        /* falseTREACHED */
     }
     /* get include directories from the environment */
     if ((s = getenv("INCLUDEDIRS")) != NULL) {
@@ -626,7 +626,7 @@ main(int argc, char **argv)
     }
     /* add /usr/include to the #include directory list,
        but not in kernelmode... kernels tend not to use it. */
-    if (kernelmode == NO) {
+    if (kernelmode == false) {
         if (NULL != (s = getenv("INCDIR"))) {
         includedir(s);
         } else {
@@ -642,28 +642,28 @@ main(int argc, char **argv)
 
     /* build the cross-reference */
     initcompress();
-    if (linemode == NO || verbosemode == YES) {    /* display if verbose as well */
+    if (linemode == false || verbosemode == true) {    /* display if verbose as well */
         postmsg("Building cross-reference...");
     }
     build();
-    if (linemode == NO ) {
+    if (linemode == false ) {
         clearmsg();    /* clear any build progress message */
     }
-    if (buildonly == YES) {
+    if (buildonly == true) {
         myexit(0);
-        /* NOTREACHED */
+        /* falseTREACHED */
     }
     }
     opendatabase();
 
     /* if using the line oriented user interface so cscope can be a
        subprocess to emacs or samuel */
-    if (linemode == YES) {
+    if (linemode == true) {
         linemode_event_loop();
     }
     /* pause before clearing the screen if there have been error messages */
-    if (errorsfound == YES) {
-    errorsfound = NO;
+    if (errorsfound == true) {
+    errorsfound = false;
     askforreturn();
     }
     /* do any optional search */
@@ -677,6 +677,6 @@ main(int argc, char **argv)
     screenmode_event_loop();
     /* cleanup and exit */
     myexit(0);
-    /* NOTREACHED */
+    /* falseTREACHED */
     return 0;        /* avoid warning... */
 }
diff --git a/src/mouse.c b/src/mouse.c
index b12ffa5..b02da7e 100644
--- a/src/mouse.c
+++ b/src/mouse.c
@@ -17,11 +17,11 @@
  without specific prior written permission.
 
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
- IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT falseT LIMITED TO,
  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
+ PURPOSE ARE DISCLAIMED. IN false EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ CONSEQUENTIAL DAMAGES (INCLUDING, BUT falseT LIMITED TO, PROCUREMENT OF
  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  INTERRUPTION)
  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
@@ -37,11 +37,11 @@
 
 #include "global.h"
 
-BOOL    mouse = NO;    		/* mouse interface */
+bool    mouse = false;    		/* mouse interface */
 
 #ifdef UNIXPC    /* build command requires #ifdef instead of #if */
 #include <sys/window.h>
-BOOL    unixpcmouse = NO;    /* running with a mouse on the Unix PC? */
+bool    unixpcmouse = false;    /* running with a mouse on the Unix PC? */
 static int uw_hs, uw_vs;    /* character height and width */
 #endif
 
@@ -74,7 +74,7 @@ static    MENU    changemenu[] = {	/* change mode menu */
 };
 
 static    MENU    *loaded;		/* menu loaded */
-static    BOOL    emacsviterm = NO;	/* terminal type */
+static    bool    emacsviterm = false;	/* terminal type */
 
 static    void    loadmenu(MENU *menu);
 static    int    getcoordinate(void);
@@ -91,14 +91,14 @@ mouseinit(void)
     term = mygetenv("TERM", "");
     if (strcmp(term, "emacsterm") == 0 ||
         strcmp(term, "viterm") == 0) {
-        emacsviterm = YES;
-        mouse = YES;
+        emacsviterm = true;
+        mouse = true;
     }
     /* the MOUSE enviroment variable is for 5620 terminal programs that have
        mouse support but the TERM environment variable is the same as a
        terminal without a mouse, such as myx */
     else if (strcmp(mygetenv("MOUSE", ""), "myx") == 0) {
-        mouse = YES;
+        mouse = true;
     }
 #if UNIXPC
     else if (strcmp(term,"s4") == 0 ||
@@ -138,10 +138,10 @@ mouseinit(void)
         	umd.um_flags= MSDOWN+MSUP;
         	ioctl(1,WIOCSETMOUSE,&umd);
         }
-        unixpcmouse = YES;
+        unixpcmouse = true;
     }
 #endif
-    if (mouse == YES) {
+    if (mouse == true) {
         loadmenu(mainmenu);
     }
 }
@@ -151,8 +151,8 @@ mouseinit(void)
 void
 mousemenu(void)
 {
-    if (mouse == YES) {
-        if (changing == YES) {
+    if (mouse == true) {
+        if (changing == true) {
         	loadmenu(changemenu);
         }
         else {
@@ -168,7 +168,7 @@ loadmenu(MENU *menu)
 {
     int    i;
 
-    if (emacsviterm == YES) {
+    if (emacsviterm == true) {
         mousereinit();
         (void) printf("\033V1");	/* display the scrollbar */
         (void) printf("\033M0@%s@%s@", menu[0].text, menu[0].value);
@@ -197,7 +197,7 @@ loadmenu(MENU *menu)
 void
 mousereinit(void)
 {
-    if (emacsviterm == YES) {
+    if (emacsviterm == true) {
 
         /* enable the mouse click and sweep coordinate control sequence */
         /* and switch to menu 2 */
@@ -231,7 +231,7 @@ drawscrollbar(int top, int bot)
 {
     int p1, p2;
 
-    if (emacsviterm == YES) {
+    if (emacsviterm == true) {
         if (bot > top) {
         	p1 = 16 + (top - 1) * 100 / totallines;
         	p2 = 16 + (bot - 1) * 100 / totallines;
@@ -265,7 +265,7 @@ getmouseaction(char leading_char)
 
 #if UNIXPC
 
-    if(unixpcmouse == YES && leading_char == ESC) {
+    if(unixpcmouse == true && leading_char == ESC) {
 
         /* Called if cscope received an ESC character.  See if it is
          * a mouse report and if so, decipher it.  A mouse report
@@ -282,7 +282,7 @@ getmouseaction(char leading_char)
          *
          * In general, the input is read until the mouse report has
          * been completely read in or we have discovered that this
-         * escape sequence is NOT a mouse report.  In the latter case
+         * escape sequence is falseT a mouse report.  In the latter case
          * return the last character read to the input stream with
          * myungetch().
          */
@@ -364,7 +364,7 @@ getmouseaction(char leading_char)
     else
 #endif    /* not UNIXPC */
 
-    if (mouse == YES && leading_char == ctrl('X')) {
+    if (mouse == true && leading_char == ctrl('X')) {
 
         switch (mygetch()) {
         case ctrl('_'):		/* click */
diff --git a/src/mygetenv.c b/src/mygetenv.c
index 5358de8..afe8d3b 100644
--- a/src/mygetenv.c
+++ b/src/mygetenv.c
@@ -17,11 +17,11 @@
  without specific prior written permission.
 
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
- IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT falseT LIMITED TO,
  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
+ PURPOSE ARE DISCLAIMED. IN false EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ CONSEQUENTIAL DAMAGES (INCLUDING, BUT falseT LIMITED TO, PROCUREMENT OF
  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  INTERRUPTION)
  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
diff --git a/src/mypopen.c b/src/mypopen.c
index f649eee..bd4f2d8 100644
--- a/src/mypopen.c
+++ b/src/mypopen.c
@@ -17,11 +17,11 @@
  without specific prior written permission.
 
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
- IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT falseT LIMITED TO,
  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
+ PURPOSE ARE DISCLAIMED. IN false EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ CONSEQUENTIAL DAMAGES (INCLUDING, BUT falseT LIMITED TO, PROCUREMENT OF
  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  INTERRUPTION)
  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
diff --git a/src/opt.c b/src/opt.c
index f8ccbbb..a31b493 100644
--- a/src/opt.c
+++ b/src/opt.c
@@ -8,8 +8,8 @@
 #include <stdlib.h>    /* atoi */
 #include <getopt.h>
 
-BOOL remove_symfile_onexit = NO;
-BOOL onesearch;        /* one search only in line mode */
+bool remove_symfile_onexit = false;
+bool onesearch;        /* one search only in line mode */
 char *reflines;        /* symbol reference lines file */
 
 char ** parse_options(int *argc, char **argv)
@@ -36,7 +36,7 @@ char ** parse_options(int *argc, char **argv)
         	myexit(1);
         	break;
         case 'X':
-        	remove_symfile_onexit = YES;
+        	remove_symfile_onexit = true;
         	break;
         case '0':
         case '1':
@@ -58,37 +58,37 @@ char ** parse_options(int *argc, char **argv)
         	strcpy(input_line, optarg);
         	break;
         case 'b':	/* only build the cross-reference */
-        	buildonly = YES;
-        	linemode  = YES;
+        	buildonly = true;
+        	linemode  = true;
         	break;
         case 'c':	/* ASCII characters only in crossref */
-        	compress = NO;
+        	compress = false;
         	break;
         case 'C':	/* turn on caseless mode for symbol searches */
-        	caseless = YES;
+        	caseless = true;
         	egrepcaseless(caseless); /* simulate egrep -i flag */
         	break;
         case 'd':	/* consider crossref up-to-date */
-        	isuptodate = YES;
+        	isuptodate = true;
         	break;
         case 'e':	/* suppress ^E prompt between files */
-        	editallprompt = NO;
+        	editallprompt = false;
         	break;
         case 'h':
         	longusage();
         	myexit(1);
         	break;
         case 'k':	/* ignore DFLT_INCDIR */
-        	kernelmode = YES;
+        	kernelmode = true;
         	break;
         case 'L':
-        	onesearch = YES;
+        	onesearch = true;
         	/* FALLTHROUGH */
         case 'l':
-        	linemode = YES;
+        	linemode = true;
         	break;
         case 'v':
-        	verbosemode = YES;
+        	verbosemode = true;
         	break;
         case 'V':
         	fprintf(stderr, "%s: version %d%s\n", argv0,
@@ -96,19 +96,19 @@ char ** parse_options(int *argc, char **argv)
         	myexit(0);
         	break;
         case 'q':	/* quick search */
-        	invertedindex = YES;
+        	invertedindex = true;
         	break;
         case 'T':	/* truncate symbols to 8 characters */
-        	trun_syms = YES;
+        	trun_syms = true;
         	break;
         case 'u':	/* unconditionally build the cross-reference */
-        	unconditional = YES;
+        	unconditional = true;
         	break;
         case 'U':	/* assume some files have changed */
-        	fileschanged = YES;
+        	fileschanged = true;
         	break;
         case 'R':
-        	recurse_dir = YES;
+        	recurse_dir = true;
         	break;
         case 'f':	/* alternate cross-reference file */
         	reffile = optarg;
@@ -116,7 +116,7 @@ char ** parse_options(int *argc, char **argv)
         		postfatal("\
         			cscope: reffile too long, cannot \
         			be > %d characters\n", sizeof(path) - 3);
-        		/* NOTREACHED */
+        		/* falseTREACHED */
         	}
         	strcpy(path, reffile);
 
diff --git a/src/readline.c b/src/readline.c
index 4ef9b88..6bef298 100644
--- a/src/readline.c
+++ b/src/readline.c
@@ -9,9 +9,9 @@ static int input_available = 0;
 static char input_char;
 char input_line[PATLEN + 1];
 
-BOOL do_terminate = NO;
+bool do_terminate = false;
 
-BOOL interpret(int c){
+bool interpret(int c){
     input_char = c;
     input_available = 1;
     rl_callback_read_char();
@@ -38,7 +38,7 @@ static void callback_handler(char* line){
 }
 
 static int interpret_break(){
-    do_terminate = YES;
+    do_terminate = true;
 }
 
 static int ctrl_z(){
@@ -46,27 +46,27 @@ static int ctrl_z(){
 }
 
 static int toggle_caseless(){
-    if (caseless == NO) {
-        caseless = YES;
+    if (caseless == false) {
+        caseless = true;
         postmsg2("Caseless mode is now ON");
     } else {
-        caseless = NO;
+        caseless = false;
         postmsg2("Caseless mode is now OFF");
     }
     egrepcaseless(caseless);    /* turn on/off -i flag */
 }
 
 static int rebuild_reference(){
-    if (isuptodate == YES) {
+    if (isuptodate == true) {
         postmsg("The -d option prevents rebuilding the symbol database");
-        return(NO);
+        return(false);
     }
     exitcurses();
     freefilelist();        /* remake the source file list */
     makefilelist();
     rebuild();
-    if (errorsfound == YES) {
-        errorsfound = NO;
+    if (errorsfound == true) {
+        errorsfound = false;
         askforreturn();
     }
     entercurses();
@@ -74,23 +74,23 @@ static int rebuild_reference(){
     totallines = 0;
     disprefs = 0;
     topline = nextline = 1;
-    return(YES);
+    return(true);
 }
 
 static int process_mouse(){
     int i;
     MOUSE* p;
     if ((p = getmouseaction(DUMMYCHAR)) == NULL) {
-        return(NO);    /* unknown control sequence */
+        return(false);    /* unknown control sequence */
     }
     /* if the button number is a scrollbar tag */
     if (p->button == '0') {
         //scrollbar(p);    // XXX
-        return(NO);
+        return(false);
     }
     /* ignore a sweep */
     if (p->x2 >= 0) {
-        return(NO);
+        return(false);
     }
     /* if this is a line selection */
     if (p->y1 > FLDLINE) {
@@ -99,7 +99,7 @@ static int process_mouse(){
         /* note: the selection is forced into range */
         for (i = disprefs - 1; i > 0; --i) {
         if (p->y1 >= displine[i]) {
-            return(NO);
+            return(false);
         }
         }
         /* display it in the file with the editor */
@@ -111,7 +111,7 @@ static int process_mouse(){
         field = FIELDS - 1;
         }
         resetcmd();
-        return(NO);
+        return(false);
     }
 }
 
diff --git a/src/scanner.h b/src/scanner.h
index 0a7f840..01c24e2 100644
--- a/src/scanner.h
+++ b/src/scanner.h
@@ -17,11 +17,11 @@
  without specific prior written permission.
 
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
- IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT falseT LIMITED TO,
  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
+ PURPOSE ARE DISCLAIMED. IN false EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ CONSEQUENTIAL DAMAGES (INCLUDING, BUT falseT LIMITED TO, PROCUREMENT OF
  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  INTERRUPTION)
  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
diff --git a/src/version.h b/src/version.h
index 920f7d3..873a2aa 100644
--- a/src/version.h
+++ b/src/version.h
@@ -17,11 +17,11 @@
  without specific prior written permission.
 
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
- IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT falseT LIMITED TO,
  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
+ PURPOSE ARE DISCLAIMED. IN false EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ CONSEQUENTIAL DAMAGES (INCLUDING, BUT falseT LIMITED TO, PROCUREMENT OF
  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  INTERRUPTION)
  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
diff --git a/src/vp.h b/src/vp.h
index add618b..c9d591c 100644
--- a/src/vp.h
+++ b/src/vp.h
@@ -17,11 +17,11 @@
  without specific prior written permission.
 
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
- IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT falseT LIMITED TO,
  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
+ PURPOSE ARE DISCLAIMED. IN false EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ CONSEQUENTIAL DAMAGES (INCLUDING, BUT falseT LIMITED TO, PROCUREMENT OF
  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  INTERRUPTION)
  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
@@ -54,7 +54,7 @@
 #include <sys/types.h>
 #include <sys/stat.h>
 
-#if !NOMALLOC
+#if !falseMALLOC
 extern    char    **vpdirs;	/* directories (including current) in view path */
 #else
 #define    MAXDIR    25		/* same as libVP */
diff --git a/src/vpaccess.c b/src/vpaccess.c
index 8695c1d..48f0a3b 100644
--- a/src/vpaccess.c
+++ b/src/vpaccess.c
@@ -17,11 +17,11 @@
  without specific prior written permission.
 
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
- IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT falseT LIMITED TO,
  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
+ PURPOSE ARE DISCLAIMED. IN false EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ CONSEQUENTIAL DAMAGES (INCLUDING, BUT falseT LIMITED TO, PROCUREMENT OF
  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  INTERRUPTION)
  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
diff --git a/src/vpfopen.c b/src/vpfopen.c
index 46a6c0b..8aa6ba8 100644
--- a/src/vpfopen.c
+++ b/src/vpfopen.c
@@ -17,11 +17,11 @@
  without specific prior written permission.
 
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
- IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT falseT LIMITED TO,
  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
+ PURPOSE ARE DISCLAIMED. IN false EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ CONSEQUENTIAL DAMAGES (INCLUDING, BUT falseT LIMITED TO, PROCUREMENT OF
  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  INTERRUPTION)
  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
diff --git a/src/vpinit.c b/src/vpinit.c
index cc18820..0009053 100644
--- a/src/vpinit.c
+++ b/src/vpinit.c
@@ -17,11 +17,11 @@
  without specific prior written permission.
 
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
- IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT falseT LIMITED TO,
  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
+ PURPOSE ARE DISCLAIMED. IN false EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ CONSEQUENTIAL DAMAGES (INCLUDING, BUT falseT LIMITED TO, PROCUREMENT OF
  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  INTERRUPTION)
  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
@@ -42,7 +42,7 @@
 #include "global.h"
 #include "constants.h"
 
-#if !NOMALLOC
+#if !falseMALLOC
 char    **vpdirs;    /* directories (including current) in view path */
 #else
 char    vpdirs[MAXDIR][DIRLEN + 1];
@@ -58,14 +58,14 @@ vpinit(char *current_dir)
     char    buf[MAXPATH + 1];
     int    i;
     char    *s;
-#if NOMALLOC
+#if falseMALLOC
     char    *node;		/* view path node */
     char    vpathbuf[MAXVPATH + 1];
 #endif
 
     /* if an existing directory list is to be updated, free it */
     if (current_dir != NULL && vpndirs > 0) {
-#if !NOMALLOC
+#if !falseMALLOC
         for (i = 0; i < vpndirs; ++i) {
         	free(vpdirs[i]);
         }
@@ -93,7 +93,7 @@ vpinit(char *current_dir)
         return;
     }
     suffix = &current_dir[i];
-#if !NOMALLOC
+#if !falseMALLOC
 
     /* count the nodes in the view path */
     vpndirs = 1;
diff --git a/src/vpopen.c b/src/vpopen.c
index 002f32f..fcdc6bf 100644
--- a/src/vpopen.c
+++ b/src/vpopen.c
@@ -17,11 +17,11 @@
  without specific prior written permission.
 
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
- IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT falseT LIMITED TO,
  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
+ PURPOSE ARE DISCLAIMED. IN false EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ CONSEQUENTIAL DAMAGES (INCLUDING, BUT falseT LIMITED TO, PROCUREMENT OF
  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  INTERRUPTION)
  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT