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mc/edit/syntax.c
Paul Sheer 7beb4c1266 optimisations to syntax highlighting
1998-04-25 11:52:29 +00:00

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27 KiB
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/* editor syntax highlighting.
Copyright (C) 1996, 1997, 1998 the Free Software Foundation
Authors: 1998 Paul Sheer
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include <config.h>
#ifdef MIDNIGHT
#include "edit.h"
#else
#include "coolwidget.h"
#endif
#if !defined(MIDNIGHT) || defined(HAVE_SYNTAXH)
int option_syntax_highlighting = 1;
/* these three functions are called from the outside */
void edit_load_syntax (WEdit * edit, char **names, char *type);
void edit_free_syntax_rules (WEdit * edit);
void edit_get_syntax_color (WEdit * edit, long byte_index, int *fg, int *bg);
static void *syntax_malloc (size_t x)
{
void *p;
p = malloc (x);
memset (p, 0, x);
return p;
}
#define syntax_free(x) {if(x){free(x);(x)=0;}}
static int compare_word_to_right (WEdit * edit, long i, char *text, char *whole_left, char *whole_right, int line_start)
{
char *p;
int c;
if (!*text)
return 0;
c = edit_get_byte (edit, i - 1);
if (line_start)
if (c != '\n')
return 0;
if (whole_left)
if (strchr (whole_left, c))
return 0;
for (p = text; *p; p++, i++) {
if (*p == '\001') {
p++;
for (;;) {
c = edit_get_byte (edit, i);
if (c == '\n')
return 0;
if (c == *p)
break;
i++;
}
} else {
if (*p != edit_get_byte (edit, i))
return 0;
}
}
if (whole_right)
if (strchr (whole_right, edit_get_byte (edit, i)))
return 0;
return 1;
}
static int compare_word_to_left (WEdit * edit, long i, char *text, char *whole_left, char *whole_right, int line_start)
{
char *p;
int c;
if (!*text)
return 0;
if (whole_right)
if (strchr (whole_right, edit_get_byte (edit, i + 1)))
return 0;
for (p = text + strlen (text) - 1; (unsigned long) p >= (unsigned long) text; p--, i--) {
if (*p == '\001') {
p--;
for (;;) {
c = edit_get_byte (edit, i);
if (c == '\n')
return 0;
if (c == *p)
break;
i--;
}
} else {
if (*p != edit_get_byte (edit, i))
return 0;
}
}
c = edit_get_byte (edit, i);
if (line_start)
if (c != '\n')
return 0;
if (whole_left)
if (strchr (whole_left, c))
return 0;
return 1;
}
#if 0
#define debug_printf(x,y) printf(x,y)
#else
#define debug_printf(x,y)
#endif
static unsigned long apply_rules_going_right (WEdit * edit, long i, unsigned long rule)
{
struct context_rule *r;
int context, keyword, c1, c2;
unsigned long border;
context = (rule & RULE_CONTEXT) >> RULE_CONTEXT_SHIFT;
keyword = (rule & RULE_WORD) >> RULE_WORD_SHIFT;
border = rule & (RULE_ON_LEFT_BORDER | RULE_ON_RIGHT_BORDER);
c1 = edit_get_byte (edit, i - 1);
c2 = edit_get_byte (edit, i);
debug_printf ("%c->", c1);
debug_printf ("%c ", c2);
/* check to turn off a context */
if (context && !keyword) {
r = edit->rules[context];
if (r->first_right == c2 && compare_word_to_right (edit, i, r->right, r->whole_word_chars_left, r->whole_word_chars_right, r->line_start_right)) {
debug_printf ("3 ", 0);
border = RULE_ON_RIGHT_BORDER;
if (r->between_delimiters) {
context = 0;
debug_printf ("context=off ", 0);
keyword = 0;
}
} else if (!r->between_delimiters && r->last_right == c1 && compare_word_to_left (edit, i - 1, r->right, r->whole_word_chars_left, r->whole_word_chars_right, r->line_start_right)) {
debug_printf ("4 ", 0);
border = 0;
if (!(rule & RULE_ON_LEFT_BORDER)) {
context = 0;
debug_printf ("context=off ", 0);
keyword = 0;
}
} else if (r->last_left == c1 && compare_word_to_left (edit, i - 1, r->left, r->whole_word_chars_left, r->whole_word_chars_right, r->line_start_left)) {
debug_printf ("2 ", 0);
border = 0;
keyword = 0;
}
}
debug_printf ("border=%s ", border ? ((border & RULE_ON_LEFT_BORDER) ? "left" : "right") : "off");
debug_printf ("\n", 0);
/* check to turn off a keyword */
if (keyword) {
struct key_word *k;
k = edit->rules[context]->keyword[keyword];
if (k->last == c1 && compare_word_to_left (edit, i - 1, k->keyword, k->whole_word_chars_left, k->whole_word_chars_right, k->line_start)) {
keyword = 0;
debug_printf ("keyword=%d ", keyword);
}
}
/* check to turn on a context */
if (!context && !keyword) {
int count;
for (count = 1; edit->rules[count]; count++) {
r = edit->rules[count];
if (r->between_delimiters && r->last_right == c1 && compare_word_to_left (edit, i - 1, r->right, r->whole_word_chars_left, r->whole_word_chars_right, r->line_start_right)) {
debug_printf ("4 count=%d", count);
border = 0;
break;
} else if (r->first_left == c2 && compare_word_to_right (edit, i, r->left, r->whole_word_chars_left, r->whole_word_chars_right, r->line_start_left)) {
debug_printf ("1 ", 0);
border = RULE_ON_LEFT_BORDER;
if (!r->between_delimiters) {
context = count;
debug_printf ("context=%d ", context);
keyword = 0;
}
break;
} else if (r->between_delimiters && r->last_left == c1 && compare_word_to_left (edit, i - 1, r->left, r->whole_word_chars_left, r->whole_word_chars_right, r->line_start_left)) {
debug_printf ("2 ", 0);
border = 0;
if (!(rule & RULE_ON_RIGHT_BORDER)) {
if (r->between_delimiters) {
context = count;
debug_printf ("context=%d ", context);
keyword = 0;
}
break;
}
}
}
}
/* check to turn on a keyword */
if (!keyword) {
char *p;
p = (r = edit->rules[context])->keyword_first_chars;
while ((p = strchr (p + 1, c2))) {
struct key_word *k;
int count;
count = (unsigned long) p - (unsigned long) r->keyword_first_chars;
k = r->keyword[count];
if (compare_word_to_right (edit, i, k->keyword, k->whole_word_chars_left, k->whole_word_chars_right, k->line_start)) {
keyword = count;
debug_printf ("keyword=%d ", keyword);
break;
}
}
}
debug_printf ("border=%s ", border ? ((border & RULE_ON_LEFT_BORDER) ? "left" : "right") : "off");
debug_printf ("keyword=%d ", keyword);
debug_printf (" %d#\n", context);
return (context << RULE_CONTEXT_SHIFT) | (keyword << RULE_WORD_SHIFT) | border;
}
static inline int resolve_left_delim (WEdit * edit, long i, struct context_rule *r, int s)
{
int c, count;
if (!r->conflicts)
return s;
for (;;) {
c = edit_get_byte (edit, i);
if (c == '\n')
break;
for (count = 1; r->conflicts[count]; count++) {
struct context_rule *p;
p = edit->rules[r->conflicts[count]];
if (!p)
break;
if (p->first_left == c && r->between_delimiters == p->between_delimiters && compare_word_to_right (edit, i, p->left, p->whole_word_chars_left, r->whole_word_chars_right, p->line_start_left))
return r->conflicts[count];
}
i--;
}
return 0;
}
/* we don't concern ourselves with single words here, 'cos we will always
start at the beginning of a line and then go right */
static unsigned long apply_rules_going_left (WEdit * edit, long i, unsigned long rule)
{
struct context_rule *r;
int context, keyword, c1, c2;
unsigned long border;
context = (rule & RULE_CONTEXT) >> RULE_CONTEXT_SHIFT;
keyword = (rule & RULE_WORD) >> RULE_WORD_SHIFT;
border = rule & (RULE_ON_LEFT_BORDER | RULE_ON_RIGHT_BORDER);
c1 = edit_get_byte (edit, i);
c2 = edit_get_byte (edit, i + 1);
debug_printf ("%c<-", c1);
debug_printf ("%c ", c2);
/* check to turn off a context */
if (context && !keyword) {
r = edit->rules[context];
if (r->first_left == c2 && compare_word_to_right (edit, i + 1, r->left, r->whole_word_chars_left, r->whole_word_chars_right, r->line_start_left)) {
debug_printf ("1 ", 0);
border = 0;
if (!(rule & RULE_ON_RIGHT_BORDER)) {
context = 0;
keyword = 0;
debug_printf ("context=off ", 0);
}
} else if (!r->between_delimiters && r->first_right == c2 && compare_word_to_right (edit, i + 1, r->right, r->whole_word_chars_left, r->whole_word_chars_right, r->line_start_right)) {
debug_printf ("3 ", 0);
border = 0;
keyword = 0;
} else if (r->last_left == c1 && compare_word_to_left (edit, i, r->left, r->whole_word_chars_left, r->whole_word_chars_right, r->line_start_left)) {
debug_printf ("2 ", 0);
border = RULE_ON_LEFT_BORDER;
if (r->between_delimiters) {
context = 0;
keyword = 0;
debug_printf ("context=off ", 0);
}
}
}
/* check to turn off a keyword */
if (keyword) {
struct key_word *k;
k = edit->rules[context]->keyword[keyword];
if (k->first == c2)
if (compare_word_to_right (edit, i + 1, k->keyword, k->whole_word_chars_left, k->whole_word_chars_right, k->line_start)) {
keyword = 0;
debug_printf ("keyword=%d ", keyword);
}
}
debug_printf ("border=%s ", border ? ((border & RULE_ON_LEFT_BORDER) ? "left" : "right") : "off");
debug_printf ("\n", 0);
/* check to turn on a context */
if (!context && !keyword) {
int count;
for (count = 1; edit->rules[count]; count++) {
r = edit->rules[count];
if (r->first_left == c2 && compare_word_to_right (edit, i + 1, r->left, r->whole_word_chars_left, r->whole_word_chars_right, r->line_start_left)) {
debug_printf ("1 ", 0);
border = 0;
keyword = 0;
break;
} else if (r->last_right == c1 && compare_word_to_left (edit, i, r->right, r->whole_word_chars_left, r->whole_word_chars_right, r->line_start_right)) {
debug_printf ("4 count=%d", count);
if (!r->between_delimiters && !(c1 == '\n' && r->single_char)) {
border = RULE_ON_RIGHT_BORDER;
context = resolve_left_delim (edit, i - 1, r, count);
debug_printf ("context=%d ", context);
}
break;
} else if (r->between_delimiters && r->first_right == c2 && compare_word_to_right (edit, i + 1, r->right, r->whole_word_chars_left, r->whole_word_chars_right, r->line_start_right)) {
debug_printf ("3 ", 0);
border = 0;
if (!(rule & RULE_ON_LEFT_BORDER))
if (r->between_delimiters && !(c2 == '\n' && r->single_char)) {
context = resolve_left_delim (edit, i, r, count);
keyword = 0;
debug_printf ("context=%d ", context);
}
break;
}
}
}
/* check to turn on a keyword */
if (!keyword) {
char *p;
p = (r = edit->rules[context])->keyword_last_chars;
while ((p = strchr (p + 1, c1))) {
struct key_word *k;
int count;
count = (unsigned long) p - (unsigned long) r->keyword_last_chars;
k = r->keyword[count];
if (k->last == c1 && compare_word_to_left (edit, i, k->keyword, k->whole_word_chars_left, k->whole_word_chars_right, k->line_start)) {
keyword = count;
debug_printf ("keyword=%d ", keyword);
break;
}
}
}
debug_printf ("border=%s ", border ? ((border & RULE_ON_LEFT_BORDER) ? "left" : "right") : "off");
debug_printf (" %d#\n", context);
return (context << RULE_CONTEXT_SHIFT) | (keyword << RULE_WORD_SHIFT) | border;
}
static unsigned long edit_get_rule (WEdit * edit, long byte_index)
{
long i;
if (byte_index < 0) {
edit->last_get_rule = -1;
edit->rule = 0;
return 0;
}
if (byte_index > edit->last_get_rule) {
for (i = edit->last_get_rule + 1; i <= byte_index; i++)
edit->rule = apply_rules_going_right (edit, i, edit->rule);
} else if (byte_index < edit->last_get_rule) {
for (i = edit->last_get_rule - 1; i >= byte_index; i--)
edit->rule = apply_rules_going_left (edit, i, edit->rule);
}
edit->last_get_rule = byte_index;
return edit->rule;
}
static void translate_rule_to_color (WEdit * edit, unsigned long rule, int *fg, int *bg)
{
struct key_word *k;
k = edit->rules[(rule & RULE_CONTEXT) >> RULE_CONTEXT_SHIFT]->keyword[(rule & RULE_WORD) >> RULE_WORD_SHIFT];
*bg = k->bg;
*fg = k->fg;
}
void edit_get_syntax_color (WEdit * edit, long byte_index, int *fg, int *bg)
{
unsigned long rule;
if (!edit->rules || byte_index >= edit->last_byte || !option_syntax_highlighting) {
#ifdef MIDNIGHT
*fg = NORMAL_COLOR;
#else
*fg = NO_COLOR;
*bg = NO_COLOR;
#endif
} else {
rule = edit_get_rule (edit, byte_index);
translate_rule_to_color (edit, rule, fg, bg);
}
}
/*
Returns 0 on error/eof or a count of the number of bytes read
including the newline. Result must be free'd.
*/
static int read_one_line (char **line, FILE * f)
{
char *p;
int len = 256, c, r = 0, i = 0;
p = syntax_malloc (len);
for (;;) {
c = fgetc (f);
if (c == -1) {
r = 0;
break;
} else if (c == '\n') {
r = i + 1; /* extra 1 for the newline just read */
break;
} else {
if (i >= len - 1) {
char *q;
q = syntax_malloc (len * 2);
memcpy (q, p, len);
syntax_free (p);
p = q;
len *= 2;
}
p[i++] = c;
}
}
p[i] = 0;
*line = p;
return r;
}
static char *strdup_convert (char *s)
{
char *r, *p;
p = r = strdup (s);
while (*s) {
switch (*s) {
case '\\':
s++;
switch (*s) {
case 'n':
*p = '\n';
break;
case 'r':
*p = '\r';
break;
case 't':
*p = '\t';
break;
case 's':
*p = ' ';
break;
case '*':
*p = '*';
break;
case '\\':
*p = '\\';
break;
default:
*p = *s;
break;
}
break;
case '*':
/* a * at the beginning or end of the line must be interpreted literally */
if ((unsigned long) p == (unsigned long) r || strlen (s) == 1)
*p = '*';
else
*p = '\001';
break;
default:
*p = *s;
break;
}
s++;
p++;
}
*p = 0;
return r;
}
#define whiteness(x) ((x) == '\t' || (x) == '\n' || (x) == ' ')
static void get_args (char *l, char **args, int *argc)
{
*argc = 0;
l--;
for (;;) {
char *p;
for (p = l + 1; *p && whiteness (*p); p++);
if (!*p)
break;
for (l = p + 1; *l && !whiteness (*l); l++);
*l = '\0';
*args = strdup_convert (p);
(*argc)++;
args++;
}
*args = 0;
}
static void free_args (char **args)
{
while (*args) {
syntax_free (*args);
*args = 0;
args++;
}
}
#define check_a {if(!*a){result=line;break;}}
#define check_not_a {if(*a){result=line;break;}}
#ifdef MIDNIGHT
int try_alloc_color_pair (char *fg, char *bg);
#endif
/* returns line number on error */
static int edit_read_syntax_rules (WEdit * edit, FILE * f)
{
char *fg, *bg;
char whole_right[256];
char whole_left[256];
char *args[1024], *l = 0;
int line = 0;
struct context_rule **r, *c;
int num_words = -1, num_contexts = -1;
int argc, result = 0;
int i, j;
args[0] = 0;
strcpy (whole_left, "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_");
strcpy (whole_right, "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_");
r = edit->rules = syntax_malloc (256 * sizeof (struct context_rule *));
for (;;) {
char **a;
line++;
if (!read_one_line (&l, f))
break;
get_args (l, args, &argc);
a = args + 1;
if (!args[0]) {
/* do nothing */
} else if (!strcmp (args[0], "wholechars")) {
check_a;
if (!strcmp (*a, "left")) {
a++;
strcpy (whole_left, *a);
} else if (!strcmp (*a, "right")) {
a++;
strcpy (whole_right, *a);
} else {
strcpy (whole_left, *a);
strcpy (whole_right, *a);
}
a++;
check_not_a;
} else if (!strcmp (args[0], "context")) {
check_a;
if (num_contexts == -1) {
if (strcmp (*a, "default")) { /* first context is the default */
*a = 0;
check_a;
}
a++;
c = r[0] = syntax_malloc (sizeof (struct context_rule));
c->left = strdup (" ");
c->right = strdup (" ");
num_contexts = 0;
} else {
c = r[num_contexts] = syntax_malloc (sizeof (struct context_rule));
if (!strcmp (*a, "exclusive")) {
a++;
c->between_delimiters = 1;
}
check_a;
if (!strcmp (*a, "whole")) {
a++;
c->whole_word_chars_left = strdup (whole_left);
c->whole_word_chars_right = strdup (whole_right);
} else if (!strcmp (*a, "wholeleft")) {
a++;
c->whole_word_chars_left = strdup (whole_left);
} else if (!strcmp (*a, "wholeright")) {
a++;
c->whole_word_chars_right = strdup (whole_right);
}
check_a;
if (!strcmp (*a, "linestart")) {
a++;
c->line_start_left = 1;
}
check_a;
c->left = strdup (*a++);
check_a;
if (!strcmp (*a, "linestart")) {
a++;
c->line_start_right = 1;
}
check_a;
c->right = strdup (*a++);
c->last_left = c->left[strlen (c->left) - 1];
c->last_right = c->right[strlen (c->right) - 1];
c->first_left = *c->left;
c->first_right = *c->right;
c->single_char = (strlen (c->right) == 1);
}
c->keyword = syntax_malloc (1024 * sizeof (struct key_word *));
num_words = 1;
c->keyword[0] = syntax_malloc (sizeof (struct key_word));
fg = *a;
if (*a)
a++;
bg = *a;
if (*a)
a++;
#ifdef MIDNIGHT
c->keyword[0]->fg = try_alloc_color_pair (fg, bg);
#else
c->keyword[0]->fg = allocate_color (fg);
c->keyword[0]->bg = allocate_color (bg);
#endif
c->keyword[0]->keyword = strdup (" ");
check_not_a;
num_contexts++;
} else if (!strcmp (args[0], "keyword")) {
struct key_word *k;
if (num_words == -1)
*a = 0;
check_a;
k = r[num_contexts - 1]->keyword[num_words] = syntax_malloc (sizeof (struct key_word));
if (!strcmp (*a, "whole")) {
a++;
k->whole_word_chars_left = strdup (whole_left);
k->whole_word_chars_right = strdup (whole_right);
} else if (!strcmp (*a, "wholeleft")) {
a++;
k->whole_word_chars_left = strdup (whole_left);
} else if (!strcmp (*a, "wholeright")) {
a++;
k->whole_word_chars_right = strdup (whole_right);
}
check_a;
if (!strcmp (*a, "linestart")) {
a++;
k->line_start = 1;
}
check_a;
if (!strcmp (*a, "whole")) {
*a = 0;
check_a;
}
k->keyword = strdup (*a++);
k->last = k->keyword[strlen (k->keyword) - 1];
k->first = *k->keyword;
fg = *a;
if (*a)
a++;
bg = *a;
if (*a)
a++;
#ifdef MIDNIGHT
k->fg = try_alloc_color_pair (fg, bg);
#else
k->fg = allocate_color (fg);
k->bg = allocate_color (bg);
#endif
check_not_a;
num_words++;
} else if (!strncmp (args[0], "#", 1)) {
/* do nothing for comment */
} else if (!strcmp (args[0], "file")) {
break;
} else { /* anything else is an error */
*a = 0;
check_a;
}
free_args (args);
syntax_free (l);
}
free_args (args);
syntax_free (l);
if (result)
return result;
if (num_contexts == -1) {
result = line;
return result;
}
for (i = 1; edit->rules[i]; i++) {
for (j = i + 1; edit->rules[j]; j++) {
if (strstr (edit->rules[j]->right, edit->rules[i]->right) && strcmp (edit->rules[i]->right, "\n")) {
unsigned char *s;
if (!edit->rules[i]->conflicts)
edit->rules[i]->conflicts = syntax_malloc (sizeof (unsigned char) * 260);
s = edit->rules[i]->conflicts;
s[strlen ((char *) s)] = (unsigned char) j;
}
}
}
{
char first_chars[1024], *p;
char last_chars[1024], *q;
for (i = 0; edit->rules[i]; i++) {
c = edit->rules[i];
p = first_chars;
q = last_chars;
*p++ = (char) 1;
*q++ = (char) 1;
for (j = 1; c->keyword[j]; j++) {
*p++ = c->keyword[j]->first;
*q++ = c->keyword[j]->last;
}
*p = '\0';
*q = '\0';
c->keyword_first_chars = strdup (first_chars);
c->keyword_last_chars = strdup (last_chars);
}
}
return result;
}
void (*syntax_change_callback) (CWidget *) = 0;
void edit_set_syntax_change_callback (void (*callback) (CWidget *))
{
syntax_change_callback = callback;
}
void edit_free_syntax_rules (WEdit * edit)
{
int i, j;
if (!edit)
return;
if (!edit->rules)
return;
syntax_free (edit->syntax_type);
if (syntax_change_callback)
#ifdef MIDNIGHT
(*syntax_change_callback) (&edit->widget);
#else
(*syntax_change_callback) (edit->widget);
#endif
for (i = 0; edit->rules[i]; i++) {
if (edit->rules[i]->keyword) {
for (j = 0; edit->rules[i]->keyword[j]; j++) {
syntax_free (edit->rules[i]->keyword[j]->keyword);
syntax_free (edit->rules[i]->keyword[j]->whole_word_chars_left);
syntax_free (edit->rules[i]->keyword[j]->whole_word_chars_right);
syntax_free (edit->rules[i]->keyword[j]);
}
}
syntax_free (edit->rules[i]->conflicts);
syntax_free (edit->rules[i]->left);
syntax_free (edit->rules[i]->right);
syntax_free (edit->rules[i]->whole_word_chars_left);
syntax_free (edit->rules[i]->whole_word_chars_right);
syntax_free (edit->rules[i]->keyword);
syntax_free (edit->rules[i]->keyword_first_chars);
syntax_free (edit->rules[i]->keyword_last_chars);
syntax_free (edit->rules[i]);
}
syntax_free (edit->rules);
}
#ifdef MIDNIGHT
char *syntax_text =
"# Allowable colors for mc are\n"
"# black\n"
"# red\n"
"# green\n"
"# brown\n"
"# blue\n"
"# magenta\n"
"# cyan\n"
"# lightgray\n"
"# gray\n"
"# brightred\n"
"# brightgreen\n"
"# yellow\n"
"# brightblue\n"
"# brightmagenta\n"
"# brightcyan\n"
"# white\n"
"\n"
"file ..\\*\\\\.([chC]|CC|cxx|cc|cpp|CPP|CXX)$ C/C++\\sProgram\n"
"context default\n"
" keyword whole void yellow\n"
" keyword whole int yellow\n"
" keyword whole unsigned yellow\n"
" keyword whole char yellow\n"
" keyword whole long yellow\n"
" keyword whole if yellow\n"
" keyword whole for yellow\n"
" keyword whole while yellow\n"
" keyword whole do yellow\n"
" keyword whole else yellow\n"
" keyword whole double yellow\n"
" keyword whole switch yellow\n"
" keyword whole case yellow\n"
" keyword whole default yellow\n"
" keyword whole static yellow\n"
" keyword whole extern yellow\n"
" keyword whole struct yellow\n"
" keyword whole typedef yellow\n"
" keyword whole ... yellow\n"
" keyword whole inline yellow\n"
" keyword whole return yellow\n"
" keyword '*' yellow\n"
" keyword > yellow\n"
" keyword < yellow\n"
" keyword + yellow\n"
" keyword - yellow\n"
" keyword \\* yellow\n"
" keyword / yellow\n"
" keyword % yellow\n"
" keyword = yellow\n"
" keyword != yellow\n"
" keyword == yellow\n"
" keyword { brightcyan\n"
" keyword } brightcyan\n"
" keyword ( brightcyan\n"
" keyword ) brightcyan\n"
" keyword [ brightcyan\n"
" keyword ] brightcyan\n"
" keyword , brightcyan\n"
" keyword : brightcyan\n"
" keyword ; brightmagenta\n"
"context /\\* \\*/ brown\n"
"context linestart # \\n brightred\n"
" keyword \\\\\\n yellow\n"
" keyword /\\**\\*/ brown\n"
" keyword \"*\" red\n"
" keyword <*> red\n"
"context \" \" green\n"
" keyword %d yellow\n"
" keyword %s yellow\n"
" keyword %c yellow\n"
" keyword %lu yellow\n"
" keyword \\\\\" yellow\n";
#else
char *syntax_text =
"file ..\\*\\\\.([chC]|CC|cxx|cc|cpp|CPP|CXX)$ C/C++\\sProgram\n"
"context default\n"
" keyword whole void 24\n"
" keyword whole int 24\n"
" keyword whole unsigned 24\n"
" keyword whole char 24\n"
" keyword whole long 24\n"
" keyword whole if 24\n"
" keyword whole for 24\n"
" keyword whole while 24\n"
" keyword whole do 24\n"
" keyword whole else 24\n"
" keyword whole double 24\n"
" keyword whole switch 24\n"
" keyword whole case 24\n"
" keyword whole default 24\n"
" keyword whole static 24\n"
" keyword whole extern 24\n"
" keyword whole struct 24\n"
" keyword whole typedef 24\n"
" keyword whole ... 24\n"
" keyword whole inline 24\n"
" keyword whole return 24\n"
" keyword '*' 6\n"
" keyword > 24\n"
" keyword < 24\n"
" keyword + 24\n"
" keyword - 24\n"
" keyword \\* 24\n"
" keyword / 24\n"
" keyword % 24\n"
" keyword = 24\n"
" keyword != 24\n"
" keyword == 24\n"
" keyword { 14\n"
" keyword } 14\n"
" keyword ( 15\n"
" keyword ) 15\n"
" keyword [ 14\n"
" keyword ] 14\n"
" keyword , 14\n"
" keyword : 14\n"
" keyword ; 19\n"
"context /\\* \\*/ 22\n"
"context linestart # \\n 18\n"
" keyword \\\\\\n 24\n"
" keyword /\\**\\*/ 22\n"
" keyword \"*\" 19\n"
" keyword <*> 19\n"
"context \" \" 6\n"
" keyword %d 24\n"
" keyword %s 24\n"
" keyword %c 24\n"
" keyword %lu 24\n"
" keyword \\\\\" 24\n"
"file \\.\\* Help\\ssupport\\sother\\sfile\\stypes\n"
"context default\n"
"file \\.\\* by\\scoding\\srules\\sin\\s~/.cedit/syntax.\n"
"context default\n"
"file \\.\\* See\\sman/syntax\\sin\\sthe\\ssource\\sdistribution\n"
"context default\n"
"file \\.\\* and\\sconsult\\sthe\\sman\\spage.\n"
"context default\n";
#endif
/* returns -1 on file error, line number on error in file syntax */
static int edit_read_syntax_file (WEdit * edit, char **names, char *syntax_file, char *editor_file, char *type)
{
FILE *f;
regex_t r;
regmatch_t pmatch[1];
char *args[1024], *l;
int line = 0;
int argc;
int result = 0;
int count = 0;
f = fopen (syntax_file, "r");
if (!f) {
f = fopen (syntax_file, "w");
if (!f)
return -1;
fprintf (f, "%s", syntax_text);
fclose (f);
f = fopen (syntax_file, "r");
if (!f)
return -1;
}
args[0] = 0;
for (;;) {
line++;
if (!read_one_line (&l, f))
break;
get_args (l, args, &argc);
if (!args[0]) {
} else if (!strcmp (args[0], "file")) {
if (!args[1] || !args[2]) {
result = line;
break;
}
if (regcomp (&r, args[1], REG_EXTENDED)) {
result = line;
break;
}
if (names) {
names[count++] = strdup (args[2]);
names[count] = 0;
} else if (type) {
if (!strcmp (type, args[2]))
goto found_type;
} else if (editor_file && edit) {
if (!regexec (&r, editor_file, 1, pmatch, 0)) {
int line_error;
found_type:
line_error = edit_read_syntax_rules (edit, f);
if (line_error)
result = line + line_error;
else {
syntax_free (edit->syntax_type);
edit->syntax_type = strdup (args[2]);
if (syntax_change_callback)
#ifdef MIDNIGHT
(*syntax_change_callback) (&edit->widget);
#else
(*syntax_change_callback) (edit->widget);
#endif
}
break;
}
}
}
free_args (args);
syntax_free (l);
}
free_args (args);
syntax_free (l);
fclose (f);
return result;
}
/* loads rules into edit struct. one of edit or names must be zero. if
edit is zero, a list of types will be stored into name. type may be zero
in which case the type will be selected according to the filename. */
void edit_load_syntax (WEdit * edit, char **names, char *type)
{
int r;
char *f;
edit_free_syntax_rules (edit);
#ifdef MIDNIGHT
if (!SLtt_Use_Ansi_Colors)
return;
#endif
if (edit) {
if (!edit->filename)
return;
if (!*edit->filename)
return;
}
f = catstrs (home_dir, SYNTAX_FILE, 0);
r = edit_read_syntax_file (edit, names, f, edit ? edit->filename : 0, type);
if (r == -1) {
edit_free_syntax_rules (edit);
edit_error_dialog (_ (" Load syntax file "), _ (" File access error "));
return;
}
if (r) {
char s[80];
edit_free_syntax_rules (edit);
sprintf (s, _ (" Syntax error in file %s on line %d "), f, r);
edit_error_dialog (_ (" Load syntax file "), s);
return;
}
}
#else
int option_syntax_highlighting = 0;
void edit_load_syntax (WEdit * edit, char **names, char *type)
{
return;
}
void edit_free_syntax_rules (WEdit * edit)
{
return;
}
void edit_get_syntax_color (WEdit * edit, long byte_index, int *fg, int *bg)
{
*fg = NORMAL_COLOR;
}
#endif /* !defined(MIDNIGHT) || defined(HAVE_SYNTAXH) */
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