Added syntax header file...
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source/syntax.h
Normal file
226
source/syntax.h
Normal file
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#include <string.h>
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#define SYNTAX_LIMIT (144)
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#define EFFECT_NORMAL ('0')
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#define EFFECT_BOLD ('1')
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#define EFFECT_ITALIC ('3')
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#define EFFECT_UNDERLINE ('4')
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#define EFFECT_BLINK ('5')
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#define EFFECT_REVERSE ('7')
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#define COLOUR_GREY ('0')
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#define COLOUR_RED ('1')
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#define COLOUR_GREEN ('2')
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#define COLOUR_YELLOW ('3')
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#define COLOUR_BLUE ('4')
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#define COLOUR_PINK ('5')
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#define COLOUR_CYAN ('6')
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#define COLOUR_WHITE ('7')
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extern void syntax_c (void);
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extern void syntax_ada (void);
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extern char * syntax_highlight (char * string);
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static size_t syntax_count = 0;
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static int syntax_enrange [SYNTAX_LIMIT];
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static int syntax_derange [SYNTAX_LIMIT];
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static char syntax_begin [SYNTAX_LIMIT] [96];
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static char syntax_end [SYNTAX_LIMIT] [96];
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static char syntax_escape [SYNTAX_LIMIT];
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static char syntax_colour [SYNTAX_LIMIT];
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static char syntax_effect [SYNTAX_LIMIT];
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static int character_compare_array (char character, char * character_array) {
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size_t i = 0;
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do {
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if (character == character_array [i]) {
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return (1);
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}
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} while (++i != strlen (character_array));
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return (0);
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}
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static void syntax_rule (int enrange,
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int derange,
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char * begin,
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char * end,
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char escape,
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char colour,
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char effect) {
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if (syntax_count >= SYNTAX_LIMIT) {
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return;
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}
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strncpy (syntax_begin [syntax_count], begin, 96);
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strncpy (syntax_end [syntax_count], end, 96);
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syntax_enrange [syntax_count] = enrange;
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syntax_derange [syntax_count] = derange;
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syntax_escape [syntax_count] = escape;
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syntax_colour [syntax_count] = colour;
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syntax_effect [syntax_count] = effect;
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++syntax_count;
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}
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static size_t syntax_loop (char * string,
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size_t * length) {
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size_t offset, subset, select;
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for (select = offset = 0; select != syntax_count; ++select) {
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if (syntax_enrange [select] == 0) {
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if (syntax_derange [select] == 0) {
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if (strncmp (string, syntax_begin [select], strlen (syntax_begin [select])) == 0) {
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break;
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}
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} else {
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if ((strncmp (string, syntax_begin [select], strlen (syntax_begin [select])) == 0)
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&& (character_compare_array (string [offset + strlen (syntax_begin [select])], syntax_end [select]) == 1)) {
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break;
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}
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}
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} else {
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for (subset = 0; subset != strlen (syntax_begin [select]); ++subset) {
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if (string [offset] == syntax_begin [select] [subset]) {
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goto selected;
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}
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}
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}
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}
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selected:
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if (select >= syntax_count) {
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* length = 1;
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return (select);
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}
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for (offset = 1; string [offset - 1] != '\0'; ++offset) {
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if (string [offset] == syntax_escape [select]) {
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++offset;
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continue;
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}
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if (syntax_derange [select] == 0) {
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if (strncmp (& string [offset], syntax_end [select], strlen (syntax_end [select])) == 0) {
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* length = offset + strlen (syntax_end [select]);
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goto finished;
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}
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} else {
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subset = 0;
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if (strcmp (syntax_end [select], "") == 0) {
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break;
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} do {
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if (string [offset] == syntax_end [select] [subset]) {
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* length = offset;
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goto finished;
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}
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} while (++subset != strlen (syntax_end [select]));
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}
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}
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finished:
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return (select);
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}
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void syntax_c (void) {
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char * separators = ".,:;<=>+-*/%!&~^?|()[]{}'\" \t\r\n";
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char * keywords [] = {
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"register", "volatile", "auto", "const", "static", "extern", "if", "else",
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"do", "while", "for", "continue", "switch", "case", "default", "break",
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"enum", "union", "struct", "typedef", "goto", "void", "return", "sizeof",
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"char", "short", "int", "long", "signed", "unsigned", "float", "double"
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};
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size_t word;
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syntax_rule (0, 0, "/*", "*/", '\0', COLOUR_GREY, EFFECT_BOLD);
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syntax_rule (0, 0, "//", "\n", '\0', COLOUR_GREY, EFFECT_BOLD);
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syntax_rule (0, 0, "#", "\n", '\\', COLOUR_YELLOW, EFFECT_ITALIC);
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syntax_rule (0, 0, "'", "'", '\\', COLOUR_PINK, EFFECT_BOLD);
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syntax_rule (0, 0, "\"", "\"", '\\', COLOUR_PINK, EFFECT_NORMAL);
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for (word = 0; word != sizeof (keywords) / sizeof (keywords [0]); ++word) {
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syntax_rule (0, 1, keywords [word], separators, '\0', COLOUR_YELLOW, EFFECT_BOLD);
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}
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syntax_rule (1, 0, "()[]{}", "", '\0', COLOUR_BLUE, EFFECT_NORMAL);
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syntax_rule (1, 0, ".,:;<=>+*-/%!&~^?|", "", '\0', COLOUR_CYAN, EFFECT_NORMAL);
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syntax_rule (1, 1, "0123456789", separators, '\0', COLOUR_PINK, EFFECT_BOLD);
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syntax_rule (1, 1, "abcdefghijklmnopqrstuvwxyz", separators, '\0', COLOUR_WHITE, EFFECT_NORMAL);
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syntax_rule (1, 1, "ABCDEFGHIJKLMNOPQRSTUVWXYZ", separators, '\0', COLOUR_WHITE, EFFECT_BOLD);
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syntax_rule (1, 1, "_", separators, '\0', COLOUR_WHITE, EFFECT_ITALIC);
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}
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void syntax_ada (void) {
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char * separators = ".,:;<=>+-*/&|()\" \t\r\n";
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char * keywords [] = {
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"abort", "else", "new", "return", "abs", "elsif", "not", "reverse",
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"abstract", "end", "null", "accept", "entry", "select", "access", "of",
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"separate", "aliased", "exit", "or", "some", "all", "others", "subtype",
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"and", "for", "out", "array", "function", "at", "tagged", "generic",
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"package", "task", "begin", "goto", "pragma", "body", "private", "then",
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"type", "case", "in", "constant", "until", "is", "raise", "use",
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"if", "declare", "range", "delay", "limited", "record", "when", "delta",
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"loop", "rem", "while", "digits", "renames", "with", "do", "mod",
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"requeue", "xor", "procedure", "protected", "interface", "synchronized", "exception", "overriding",
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"terminate"
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};
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size_t word;
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syntax_rule (0, 0, "--", "\n", '\0', COLOUR_GREY, EFFECT_BOLD);
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syntax_rule (0, 0, "'", "'", '\\', COLOUR_PINK, EFFECT_BOLD);
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syntax_rule (0, 0, "\"", "\"", '\\', COLOUR_PINK, EFFECT_NORMAL);
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for (word = 0; word != sizeof (keywords) / sizeof (keywords [0]); ++word) {
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syntax_rule (0, 1, keywords [word], separators, '\0', COLOUR_YELLOW, EFFECT_BOLD);
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}
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syntax_rule (1, 0, "()", "", '\0', COLOUR_BLUE, EFFECT_NORMAL);
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syntax_rule (1, 0, ".,:;<=>+-*/&|'", "", '\0', COLOUR_CYAN, EFFECT_NORMAL);
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syntax_rule (1, 1, "0123456789", separators, '\0', COLOUR_PINK, EFFECT_BOLD);
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syntax_rule (1, 1, "abcdefghijklmnopqrstuvwxyz", separators, '\0', COLOUR_WHITE, EFFECT_NORMAL);
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syntax_rule (1, 1, "ABCDEFGHIJKLMNOPQRSTUVWXYZ", separators, '\0', COLOUR_WHITE, EFFECT_BOLD);
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}
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char * syntax_highlight (char * code) {
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static char buffer [4096] = "";
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static char string [4096] = "";
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size_t select, length, offset;
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memset (buffer, 0, sizeof (buffer));
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memset (string, 0, sizeof (string));
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strcpy (string, code);
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for (offset = 0; offset < strlen (string); offset += length) {
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select = syntax_loop (& string [offset], & length);
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if (select >= syntax_count) {
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strncat (buffer, "\033[1;31m", 7);
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} else {
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char colour [8] = "\033[-;3-m";
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colour [2] = syntax_effect [select];
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colour [5] = syntax_colour [select];
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strncat (buffer, colour, 7);
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}
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strncat (buffer, & string [offset], (size_t) length);
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strncat (buffer, "\033[0m", 4);
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}
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return (buffer);
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}
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