Replace bin2c.sh with a more portable implementation.

`xxd' is not available on all systems, and on others does not support
the `-i' flag. Since bin2c.sh relied on a tool that I can't seem to find
a compatible version of, I have included a simple, portable replacement in C.

Usage remains the same:
bin2c ARRAYNAME < inputfile > outputfile.

This change is also reflected in emul/Makefile.

emul/Makefile

@@ -6,6 +6,7 @@ ZASMBIN = zasm/zasm
 AVRABIN = zasm/avra
 SHELLAPPS = zasm ed
 SHELLTGTS = ${SHELLAPPS:%=cfsin/%}
+BIN2C = ../tools/bin2c/bin2c
 # Those Forth source files are in a particular order
 FORTHSRCS = core.fs str.fs parse.fs readln.fs fmt.fs z80a.fs
 FORTHSRC_PATHS = ${FORTHSRCS:%=../forth/%}
@@ -17,12 +18,15 @@ ZASMOBJS = $(SHELLOBJS)
 .PHONY: all
 all: $(TARGETS) $(AVRABIN) $(CFSIN_CONTENTS)
 
+$(BIN2C): ../tools/bin2c/bin2c.c
+	$(MAKE) -C ../tools/bin2c
+
 # -o in sync with SHELL_CODE in shell/glue.asm
-shell/shell.bin: shell/glue.asm $(ZASMBIN)
+shell/shell.bin: shell/glue.asm $(ZASMBIN) $(BIN2C)
 	$(ZASMBIN) $(KERNEL) shell/user.h $(APPS) < shell/glue.asm | tee $@ > /dev/null
 
-shell/shell-bin.h: shell/shell.bin
-	./bin2c.sh KERNEL < shell/shell.bin | tee $@ > /dev/null
+shell/shell-bin.h: shell/shell.bin $(BIN2C)
+	$(BIN2C) KERNEL < shell/shell.bin | tee $@ > /dev/null
 
 shell/shell: shell/shell.c $(SHELLOBJS) shell/shell-bin.h 
 	$(CC) shell/shell.c $(SHELLOBJS) -o $@
@@ -32,8 +36,8 @@ shell/shell: shell/shell.c $(SHELLOBJS) shell/shell-bin.h
 forth/forth0.bin:
 	cat forth/boot.bin forth/z80c.bin > $@
 
-forth/forth0-bin.h: forth/forth0.bin
-	./bin2c.sh KERNEL < forth/forth0.bin | tee $@ > /dev/null
+forth/forth0-bin.h: forth/forth0.bin $(BIN2C)
+	$(BIN2C) KERNEL < forth/forth0.bin | tee $@ > /dev/null
 
 forth/stage1: forth/stage.c $(OBJS) forth/forth0-bin.h 
 	$(CC) forth/stage.c $(OBJS) -o $@
@@ -47,8 +51,8 @@ forth/core.bin: $(FORTHSRC_PATHS) forth/stage1
 forth/forth1.bin: forth/forth0.bin forth/core.bin
 	cat forth/forth0.bin forth/core.bin > $@
 
-forth/forth1-bin.h: forth/forth1.bin
-	./bin2c.sh KERNEL < forth/forth1.bin | tee $@ > /dev/null
+forth/forth1-bin.h: forth/forth1.bin $(BIN2C)
+	$(BIN2C) KERNEL < forth/forth1.bin | tee $@ > /dev/null
 
 forth/stage2: forth/stage.c $(OBJS) forth/forth1-bin.h 
 	$(CC) -DSTAGE2 forth/stage.c $(OBJS) -o $@
@@ -56,11 +60,11 @@ forth/stage2: forth/stage.c $(OBJS) forth/forth1-bin.h
 forth/forth: forth/forth.c $(OBJS) forth/forth1-bin.h 
 	$(CC) forth/forth.c $(OBJS) -o $@
 
-zasm/kernel-bin.h: zasm/kernel.bin
-	./bin2c.sh KERNEL < zasm/kernel.bin | tee $@ > /dev/null
+zasm/kernel-bin.h: zasm/kernel.bin $(BIN2C)
+	$(BIN2C) KERNEL < zasm/kernel.bin | tee $@ > /dev/null
 
-zasm/zasm-bin.h: zasm/zasm.bin
-	./bin2c.sh USERSPACE < zasm/zasm.bin | tee $@ > /dev/null
+zasm/zasm-bin.h: zasm/zasm.bin $(BIN2C)
+	$(BIN2C) USERSPACE < zasm/zasm.bin | tee $@ > /dev/null
 
 $(ZASMBIN): zasm/zasm.c $(ZASMOBJS) zasm/kernel-bin.h zasm/zasm-bin.h
 	$(CC) zasm/zasm.c $(ZASMOBJS) -o $@
@@ -68,8 +72,8 @@ $(ZASMBIN): zasm/zasm.c $(ZASMOBJS) zasm/kernel-bin.h zasm/zasm-bin.h
 zasm/avra.bin: $(ZASMBIN)
 	$(ZASMBIN) $(KERNEL) $(APPS) zasm/user.h < $(APPS)/zasm/gluea.asm > $@
 
-zasm/avra-bin.h: zasm/avra.bin
-	./bin2c.sh USERSPACE < zasm/avra.bin | tee $@ > /dev/null
+zasm/avra-bin.h: zasm/avra.bin $(BIN2C)
+	$(BIN2C) USERSPACE < zasm/avra.bin | tee $@ > /dev/null
 
 $(AVRABIN): zasm/zasm.c $(ZASMOBJS) zasm/kernel-bin.h zasm/avra-bin.h
 	$(CC) -D AVRA zasm/zasm.c $(ZASMOBJS) -o $@
@@ -109,3 +113,4 @@ fbootstrap: forth/stage2
 .PHONY: clean
 clean:
 	rm -f $(TARGETS) $(SHELLTGTS) emul.o zasm/*-bin.h shell/*-bin.h
+	$(MAKE) -C ../tools/bin2c clean

emul/bin2c.sh

@@ -1,5 +0,0 @@
-#!/bin/sh
-
-echo "unsigned char $1[] = { "
-xxd -i -
-echo " };"

tools/bin2c/Makefile

@@ -0,0 +1,12 @@
+.PHONY: all clean
+
+all: bin2c
+
+bin2c: bin2c.o
+	$(CC) -o $@ $<
+
+%.o: %.c
+	$(CC) -c -o $@ $<
+
+clean:
+	rm -rf bin2c bin2c.o

tools/bin2c/bin2c.c

@@ -0,0 +1,33 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+#define BUFSZ 32
+
+static const char intro[] = "static const unsigned char %s[] = {\n    ";
+
+int main(int argc, char **argv) {
+  int n;
+  int col = 0;
+  uint8_t buf[BUFSZ];
+  
+  if (argc < 2) {
+    fprintf(stderr, "Specify a name for the data structure...\n");
+    return 1;
+  }
+
+  printf(intro, argv[1]);
+
+  while(!feof(stdin)) {
+    n = fread(buf, 1, BUFSZ, stdin);
+    for(int i = 0; i < n; ++i) {
+      if (col+4 >= 76) {
+          printf("\n    ");
+          col = 0;
+        }
+      printf("0x%.2x, ", buf[i]);
+      col += 6;
+    }
+  }
+
+  printf("};\n");
+}