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mc/edit/syntax.c
Paul Sheer f6e27d5018 syntax highlighting segfault fix
1998-05-01 09:32:43 +00:00

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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, j;
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++) {
switch (*p) {
case '\001':
p++;
for (;;) {
c = edit_get_byte (edit, i);
if (c == *p)
break;
if (c == '\n')
return 0;
i++;
}
break;
case '\002':
p++;
for (;;) {
c = edit_get_byte (edit, i);
if (c == *p)
break;
if (c == '\n' || c == '\t' || c == ' ')
return 0;
i++;
}
break;
case '\003':
p++;
#if 0
c = edit_get_byte (edit, i++);
for (j = 0; p[j] != '\003'; j++)
if (c == p[j])
goto found_char1;
return 0;
found_char1:
#endif
for (;;i++) {
c = edit_get_byte (edit, i);
for (j = 0; p[j] != '\003'; j++)
if (c == p[j])
goto found_char2;
break;
found_char2:
}
i--;
while (*p != '\003')
p++;
break;
#if 0
case '\004':
p++;
c = edit_get_byte (edit, i++);
for (j = 0; p[j] != '\004'; j++)
if (c == p[j])
return 0;
for (;;i++) {
c = edit_get_byte (edit, i);
for (j = 0; p[j] != '\004'; j++)
if (c == p[j])
goto found_char4;
continue;
found_char4:
break;
}
i--;
while (*p != '\004')
p++;
break;
#endif
default:
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, j;
#if 0
int d;
#endif
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--) {
switch (*p) {
case '\001':
p--;
for (;;) {
c = edit_get_byte (edit, i);
if (c == *p)
break;
if (c == '\n')
return 0;
i--;
}
break;
case '\002':
p--;
for (;;) {
c = edit_get_byte (edit, i);
if (c == *p)
break;
if (c == '\n' || c == '\t' || c == ' ')
return 0;
i--;
}
break;
case '\003':
while (*(--p) != '\003');
p++;
#if 0
c = edit_get_byte (edit, i--);
for (j = 0; p[j] != '\003'; j++)
if (c == p[j])
goto found_char1;
return 0;
found_char1:
#endif
for (;; i--) {
c = edit_get_byte (edit, i);
for (j = 0; p[j] != '\003'; j++)
if (c == p[j])
goto found_char2;
break;
found_char2:
}
i++;
p--;
break;
#if 0
case '\004':
while (*(--p) != '\004');
d = *p;
p++;
c = edit_get_byte (edit, i--);
for (j = 0; p[j] != '\004'; j++)
if (c == p[j])
return 0;
for (;; i--) {
c = edit_get_byte (edit, i);
for (j = 0; p[j] != '\004'; j++)
if (c == p[j] || c == '\n' || c == d)
goto found_char4;
continue;
found_char4:
break;
}
i++;
p--;
break;
#endif
default:
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) fprintf(stderr,x,y)
#else
#define debug_printf(x,y)
#endif
static inline unsigned long apply_rules_going_right (WEdit * edit, long i, unsigned long rule)
{
struct context_rule *r;
int context, keyword, c1, c2;
int found_right = 0, found_left = 0;
int done = 0;
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);
if (!c2 || !c1)
return rule;
debug_printf ("%c->", c1);
debug_printf ("%c ", c2);
/* 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);
}
}
debug_printf ("border=%s ", border ? ((border & RULE_ON_LEFT_BORDER) ? "left" : "right") : "off");
/* 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) \
&& !(rule & RULE_ON_RIGHT_BORDER)) {
debug_printf ("A:3 ", 0);
found_right = 1;
border = RULE_ON_RIGHT_BORDER;
if (r->between_delimiters) {
context = 0;
keyword = 0;
}
} else if (!found_left) {
if (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) \
&&(rule & RULE_ON_RIGHT_BORDER)) {
/* always turn off a context at 4 */
debug_printf ("A:4 ", 0);
found_left = 1;
border = 0;
context = 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) \
&&(rule & RULE_ON_LEFT_BORDER)) {
/* never turn off a context at 2 */
debug_printf ("A:2 ", 0);
found_left = 1;
border = 0;
keyword = 0;
}
}
}
debug_printf ("\n", 0);
/* check to turn on a context */
if (!context && !keyword) {
int count;
for (count = 1; edit->rules[count] && !done; count++) {
r = edit->rules[count];
if (!found_left) {
if (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) \
&&(rule & RULE_ON_RIGHT_BORDER)) {
debug_printf ("B:4 count=%d", count);
found_left = 1;
border = 0;
context = 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) \
&&(rule & RULE_ON_LEFT_BORDER)) {
debug_printf ("B:2 ", 0);
found_left = 1;
border = 0;
if (r->between_delimiters) {
context = count;
debug_printf ("context=%d ", context);
keyword = 0;
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 ("B:3 ", 0);
found_right = 1;
border = RULE_ON_RIGHT_BORDER;
context = 0;
keyword = 0;
}
}
break;
}
}
if (!found_right) {
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 ("B:1 ", 0);
found_right = 1;
border = RULE_ON_LEFT_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\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;
}
static inline unsigned long apply_rules_going_left (WEdit * edit, long i, unsigned long rule)
{
struct context_rule *r;
int context, keyword, c2, c1;
int found_left = 0, found_right = 0;
int done = 0;
unsigned long border;
context = (rule & RULE_CONTEXT) >> RULE_CONTEXT_SHIFT;
keyword = (rule & RULE_WORD) >> RULE_WORD_SHIFT;
border = rule & (RULE_ON_RIGHT_BORDER | RULE_ON_LEFT_BORDER);
c1 = edit_get_byte (edit, i);
c2 = edit_get_byte (edit, i + 1);
if (!c2 || !c1)
return rule;
debug_printf ("%c->", c2);
debug_printf ("%c ", c1);
/* check to turn off a keyword */
if (keyword) {
struct key_word *k;
k = edit->rules[context]->keyword[keyword];
if (k->first == c2 && compare_word_to_right (edit, i + 1, k->keyword, k->whole_word_chars_right, k->whole_word_chars_left, k->line_start)) {
keyword = 0;
debug_printf ("keyword=%d ", keyword);
}
}
debug_printf ("border=%s ", border ? ((border & RULE_ON_RIGHT_BORDER) ? "right" : "left") : "off");
/* check to turn off a context */
if (context && !keyword) {
r = edit->rules[context];
if (r->last_left == c1 && compare_word_to_left (edit, i, r->left, r->whole_word_chars_right, r->whole_word_chars_left, r->line_start_left) \
&&!(rule & RULE_ON_LEFT_BORDER)) {
debug_printf ("A:2 ", 0);
found_left = 1;
border = RULE_ON_LEFT_BORDER;
if (r->between_delimiters) {
context = 0;
keyword = 0;
}
} else if (!found_right) {
if (r->first_left == c2 && compare_word_to_right (edit, i + 1, r->left, r->whole_word_chars_right, r->whole_word_chars_left, r->line_start_left) \
&&(rule & RULE_ON_LEFT_BORDER)) {
/* always turn off a context at 4 */
debug_printf ("A:1 ", 0);
found_right = 1;
border = 0;
context = 0;
keyword = 0;
} else if (r->first_right == c2 && compare_word_to_right (edit, i + 1, r->right, r->whole_word_chars_right, r->whole_word_chars_left, r->line_start_right) \
&&(rule & RULE_ON_RIGHT_BORDER)) {
/* never turn off a context at 2 */
debug_printf ("A:3 ", 0);
found_right = 1;
border = 0;
keyword = 0;
}
}
}
debug_printf ("\n", 0);
/* check to turn on a context */
if (!context && !keyword) {
int count;
for (count = 1; edit->rules[count] && !done; count++) {
r = edit->rules[count];
if (!found_right) {
if (r->first_left == c2 && compare_word_to_right (edit, i + 1, r->left, r->whole_word_chars_right, r->whole_word_chars_left, r->line_start_left) \
&&(rule & RULE_ON_LEFT_BORDER)) {
debug_printf ("B:1 count=%d", count);
found_right = 1;
border = 0;
context = 0;
} else if (r->first_right == c2 && compare_word_to_right (edit, i + 1, r->right, r->whole_word_chars_right, r->whole_word_chars_left, r->line_start_right) \
&&(rule & RULE_ON_RIGHT_BORDER)) {
if (!(c2 == '\n' && r->single_char)) {
debug_printf ("B:3 ", 0);
found_right = 1;
border = 0;
if (r->between_delimiters) {
context = resolve_left_delim (edit, i, r, count);
debug_printf ("context=%d ", context);
keyword = 0;
if (r->last_left == c1 && compare_word_to_left (edit, i, r->left, r->whole_word_chars_right, r->whole_word_chars_left, r->line_start_left)) {
debug_printf ("B:2 ", 0);
found_left = 1;
border = RULE_ON_LEFT_BORDER;
context = 0;
keyword = 0;
}
}
break;
}
}
}
if (!found_left) {
if (r->last_right == c1 && compare_word_to_left (edit, i, r->right, r->whole_word_chars_right, r->whole_word_chars_left, r->line_start_right)) {
if (!(c1 == '\n' && r->single_char)) {
debug_printf ("B:4 ", 0);
found_left = 1;
border = RULE_ON_RIGHT_BORDER;
if (!r->between_delimiters)
context = resolve_left_delim (edit, i - 1, r, count);
keyword = 0;
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 (compare_word_to_left (edit, i, k->keyword, k->whole_word_chars_right, k->whole_word_chars_left, k->line_start)) {
keyword = count;
debug_printf ("keyword=%d ", keyword);
break;
}
}
}
debug_printf ("border=%s ", border ? ((border & RULE_ON_RIGHT_BORDER) ? "right" : "left") : "off");
debug_printf ("keyword=%d ", keyword);
debug_printf (" %d#\n\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 0
if (byte_index < edit->last_get_rule_start_display) {
/* this is for optimisation */
for (i = edit->last_get_rule_start_display - 1; i >= byte_index; i--)
edit->rule_start_display = apply_rules_going_left (edit, i, edit->rule_start_display);
edit->last_get_rule_start_display = byte_index;
edit->rule = edit->rule_start_display;
} else
#endif
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)
{
#if 0
int e = 0;
#endif
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;
case '[':
case ']':
if ((unsigned long) p == (unsigned long) r || strlen (s) == 1)
*p = *s;
else {
#if 0
if (!strncmp (s, "[^", 2)) {
*p = '\004';
e = 1;
s++;
} else {
if (e)
*p = '\004';
else
#endif
*p = '\003';
#if 0
e = 0;
}
#endif
}
break;
default:
*p = *s;
break;
}
break;
case '*':
/* a * or + 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;
case '+':
if ((unsigned long) p == (unsigned long) r || strlen (s) == 1)
*p = '+';
else
*p = '\002';
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);
int this_try_alloc_color_pair (char *fg, char *bg)
{
char f[80], b[80], *p;
if (fg) {
strcpy (f, fg);
p = strchr (f, '/');
if (p)
*p = '\0';
fg = f;
}
if (bg) {
strcpy (b, bg);
p = strchr (b, '/');
if (p)
*p = '\0';
bg = b;
}
return try_alloc_color_pair (fg, bg);
}
#else
int this_allocate_color (char *fg)
{
char *p;
if (!fg)
return allocate_color (0);
p = strchr (fg, '/');
if (!p)
return allocate_color (fg);
return allocate_color (p + 1);
}
#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_01234567890");
strcpy (whole_right, "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_01234567890");
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 = this_try_alloc_color_pair (fg, bg);
#else
c->keyword[0]->fg = this_allocate_color (fg);
c->keyword[0]->bg = this_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 = this_try_alloc_color_pair (fg, bg);
#else
k->fg = this_allocate_color (fg);
k->bg = this_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);
}
#define CURRENT_SYNTAX_RULES_VERSION "19"
char *syntax_text =
"# syntax rules version " CURRENT_SYNTAX_RULES_VERSION "\n"
"# Allowable colors for mc are\n"
"# (after the slash is a Cooledit color, 0-26 or any of the X colors in rgb.txt)\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"
"###############################################################################\n"
"file ..\\*\\\\.([chC]|CC|cxx|cc|cpp|CPP|CXX)$ C/C\\+\\+\\sProgram\n"
"context default\n"
" keyword whole auto yellow/24\n"
" keyword whole break yellow/24\n"
" keyword whole case yellow/24\n"
" keyword whole char yellow/24\n"
" keyword whole const yellow/24\n"
" keyword whole continue yellow/24\n"
" keyword whole default yellow/24\n"
" keyword whole do yellow/24\n"
" keyword whole double yellow/24\n"
" keyword whole else yellow/24\n"
" keyword whole enum yellow/24\n"
" keyword whole extern yellow/24\n"
" keyword whole float yellow/24\n"
" keyword whole for yellow/24\n"
" keyword whole goto yellow/24\n"
" keyword whole if yellow/24\n"
" keyword whole int yellow/24\n"
" keyword whole long yellow/24\n"
" keyword whole register yellow/24\n"
" keyword whole return yellow/24\n"
" keyword whole short yellow/24\n"
" keyword whole signed yellow/24\n"
" keyword whole sizeof yellow/24\n"
" keyword whole static yellow/24\n"
" keyword whole struct yellow/24\n"
" keyword whole switch yellow/24\n"
" keyword whole typedef yellow/24\n"
" keyword whole union yellow/24\n"
" keyword whole unsigned yellow/24\n"
" keyword whole void yellow/24\n"
" keyword whole volatile yellow/24\n"
" keyword whole while yellow/24\n"
" keyword whole asm yellow/24\n"
" keyword whole catch yellow/24\n"
" keyword whole class yellow/24\n"
" keyword whole friend yellow/24\n"
" keyword whole delete yellow/24\n"
" keyword whole inline yellow/24\n"
" keyword whole new yellow/24\n"
" keyword whole operator yellow/24\n"
" keyword whole private yellow/24\n"
" keyword whole protected yellow/24\n"
" keyword whole public yellow/24\n"
" keyword whole this yellow/24\n"
" keyword whole throw yellow/24\n"
" keyword whole template yellow/24\n"
" keyword whole try yellow/24\n"
" keyword whole virtual yellow/24\n"
" keyword whole bool yellow/24\n"
" keyword whole const_cast yellow/24\n"
" keyword whole dynamic_cast yellow/24\n"
" keyword whole explicit yellow/24\n"
" keyword whole false yellow/24\n"
" keyword whole mutable yellow/24\n"
" keyword whole namespace yellow/24\n"
" keyword whole reinterpret_cast yellow/24\n"
" keyword whole static_cast yellow/24\n"
" keyword whole true yellow/24\n"
" keyword whole typeid yellow/24\n"
" keyword whole typename yellow/24\n"
" keyword whole using yellow/24\n"
" keyword whole wchar_t yellow/24\n"
" keyword whole ... yellow/24\n"
" keyword '\\s' brightgreen/16\n"
" keyword '+' brightgreen/16\n"
" keyword > yellow/24\n"
" keyword < yellow/24\n"
" keyword \\+ yellow/24\n"
" keyword - yellow/24\n"
" keyword \\* yellow/24\n"
" keyword / yellow/24\n"
" keyword % yellow/24\n"
" keyword = yellow/24\n"
" keyword != yellow/24\n"
" keyword == yellow/24\n"
" keyword { brightcyan/14\n"
" keyword } brightcyan/14\n"
" keyword ( brightcyan/15\n"
" keyword ) brightcyan/15\n"
" keyword [ brightcyan/14\n"
" keyword ] brightcyan/14\n"
" keyword , brightcyan/14\n"
" keyword : brightcyan/14\n"
" keyword ; brightmagenta/19\n"
"context /\\* \\*/ brown/22\n"
"context linestart # \\n brightred/18\n"
" keyword \\\\\\n yellow/24\n"
" keyword /\\**\\*/ brown/22\n"
" keyword \"+\" red/19\n"
" keyword <+> red/19\n"
"context \" \" green/6\n"
" keyword \\\\\" brightgreen/16\n"
" keyword %% brightgreen/16\n"
" keyword %\\[#0\\s-\\+,\\]\\[0123456789\\]\\[.\\]\\[0123456789\\]\\[L\\]e brightgreen/16\n"
" keyword %\\[#0\\s-\\+,\\]\\[0123456789\\]\\[.\\]\\[0123456789\\]\\[L\\]E brightgreen/16\n"
" keyword %\\[#0\\s-\\+,\\]\\[0123456789\\]\\[.\\]\\[0123456789\\]\\[L\\]f brightgreen/16\n"
" keyword %\\[#0\\s-\\+,\\]\\[0123456789\\]\\[.\\]\\[0123456789\\]\\[L\\]g brightgreen/16\n"
" keyword %\\[#0\\s-\\+,\\]\\[0123456789\\]\\[.\\]\\[0123456789\\]\\[L\\]G brightgreen/16\n"
" keyword %\\[0\\s-\\+,\\]\\[0123456789\\]\\[.\\]\\[0123456789\\]\\[hl\\]d brightgreen/16\n"
" keyword %\\[0\\s-\\+,\\]\\[0123456789\\]\\[.\\]\\[0123456789\\]\\[hl\\]i brightgreen/16\n"
" keyword %\\[#0\\s-\\+,\\]\\[0123456789\\]\\[.\\]\\[0123456789\\]\\[hl\\]o brightgreen/16\n"
" keyword %\\[0\\s-\\+,\\]\\[0123456789\\]\\[.\\]\\[0123456789\\]\\[hl\\]u brightgreen/16\n"
" keyword %\\[#0\\s-\\+,\\]\\[0123456789\\]\\[.\\]\\[0123456789\\]\\[hl\\]x brightgreen/16\n"
" keyword %\\[#0\\s-\\+,\\]\\[0123456789\\]\\[.\\]\\[0123456789\\]\\[hl\\]X brightgreen/16\n"
" keyword %\\[hl\\]n brightgreen/16\n"
" keyword %\\[.\\]\\[0123456789\\]s brightgreen/16\n"
" keyword %[*] brightgreen/16\n"
" keyword %c brightgreen/16\n"
" keyword \\\\\\\\ brightgreen/16\n"
"\n"
"###############################################################################\n"
"file .\\*ChangeLog$ GNU\\sDistribution\\sChangeLog\\sFile\n"
"\n"
"context default\n"
" keyword \\s+() brightmagenta/23\n"
" keyword \\t+() brightmagenta/23\n"
"\n"
"context linestart \\t\\* : brightcyan/17\n"
"context linestart \\s\\s\\s\\s\\s\\s\\s\\s\\* : brightcyan/17\n"
"\n"
"context linestart 19+-+\\s \\n yellow/24\n"
" keyword <+@+> brightred/19\n"
"context linestart 20+-+\\s \\n yellow/24\n"
" keyword <+@+> brightred/19\n"
"context linestart Mon\\s+\\s+\\s+\\s \\n yellow/24\n"
" keyword <+@+> brightred/19\n"
"context linestart Tue\\s+\\s+\\s+\\s \\n yellow/24\n"
" keyword <+@+> brightred/19\n"
"context linestart Wed\\s+\\s+\\s+\\s \\n yellow/24\n"
" keyword <+@+> brightred/19\n"
"context linestart Thu\\s+\\s+\\s+\\s \\n yellow/24\n"
" keyword <+@+> brightred/19\n"
"context linestart Fri\\s+\\s+\\s+\\s \\n yellow/24\n"
" keyword <+@+> brightred/19\n"
"context linestart Sat\\s+\\s+\\s+\\s \\n yellow/24\n"
" keyword <+@+> brightred/19\n"
"context linestart Sun\\s+\\s+\\s+\\s \\n yellow/24\n"
" keyword <+@+> brightred/19\n"
"\n"
"\n"
"###############################################################################\n"
"file .\\*Makefile[\\\\\\.a-z]\\*$ Makefile\n"
"\n"
"context default\n"
" keyword $(*) yellow/24\n"
" keyword ${*} brightgreen/16\n"
" keyword whole linestart include magenta\n"
" keyword whole linestart endif magenta\n"
" keyword whole linestart ifeq magenta\n"
" keyword whole linestart ifneq magenta\n"
" keyword whole linestart else magenta\n"
" keyword linestart \\t lightgray/13 red\n"
" keyword whole .PHONY white/25\n"
" keyword whole .NOEXPORT white/25\n"
" keyword = white/25\n"
" keyword : yellow/24\n"
" keyword \\\\\\n yellow/24\n"
"# this handles strange cases like @something@@somethingelse@ properly\n"
" keyword whole @+@ brightmagenta/23 black/0\n"
" keyword @+@ brightmagenta/23 black/0\n"
"\n"
"context linestart # \\n brown/22\n"
" keyword whole @+@ brightmagenta/23 black/0\n"
" keyword @+@ brightmagenta/23 black/0\n"
"\n"
"context exclusive = \\n brightcyan/17\n"
" keyword \\\\\\n yellow/24\n"
" keyword $(*) yellow/24\n"
" keyword ${*} brightgreen/16\n"
" keyword linestart \\t lightgray/13 red\n"
" keyword whole @+@ brightmagenta/23 black/0\n"
" keyword @+@ brightmagenta/23 black/0\n"
"\n"
"context exclusive linestart \\t \\n\n"
" keyword \\\\\\n yellow/24\n"
" keyword $(*) yellow/24\n"
" keyword ${*} brightgreen/16\n"
" keyword linestart \\t lightgray/13 red\n"
" keyword whole @+@ brightmagenta/23 black/0\n"
" keyword @+@ brightmagenta/23 black/0\n"
"\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";
FILE *upgrade_syntax_file (char *syntax_file)
{
FILE *f;
char line[80];
f = fopen (syntax_file, "r");
if (!f) {
f = fopen (syntax_file, "w");
if (!f)
return 0;
fprintf (f, "%s", syntax_text);
fclose (f);
return fopen (syntax_file, "r");
}
memset (line, 0, 79);
fread (line, 80, 1, f);
if (!strstr (line, "syntax rules version")) {
goto rename_rule_file;
} else {
char *p;
p = strstr (line, "version") + strlen ("version") + 1;
if (atoi (p) < atoi (CURRENT_SYNTAX_RULES_VERSION)) {
char s[1024];
rename_rule_file:
strcpy (s, syntax_file);
strcat (s, ".OLD");
unlink (s);
rename (syntax_file, s);
unlink (syntax_file); /* might rename() fail ? */
#ifdef MIDNIGHT
edit_message_dialog (" Load Syntax Rules ", " Your syntax rule file is outdated \n A new rule file is being installed. \n Your old rule file has been saved with a .OLD extension. ");
#else
CMessageDialog (0, 20, 20, 0, " Load Syntax Rules ", " Your syntax rule file is outdated \n A new rule file is being installed. \n Your old rule file has been saved with a .OLD extension. ");
#endif
return upgrade_syntax_file (syntax_file);
} else {
rewind (f);
return (f);
}
}
return 0; /* not reached */
}
/* 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 = upgrade_syntax_file (syntax_file);
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
/* if there are no rules then turn off syntax highlighting for speed */
if (!edit->rules[1])
if (!edit->rules[0]->keyword[1])
edit_free_syntax_rules (edit);
}
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 && !type)
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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