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mc/edit/syntax.c
Andrew V. Samoilov fc3ef44f3b * syntax.c (convert): Fix buffer overflow for ".*\" cases.
2002-02-18 14:48:36 +00:00

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/* editor syntax highlighting.
Copyright (C) 1996, 1997, 1998 the Free Software Foundation
Authors: 1998 Paul Sheer
$Id$
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., 59 Temple Place, Suite 330, Boston, MA
02111-1307, USA.
*/
#include <config.h>
#include "edit.h"
/* bytes */
#define SYNTAX_MARKER_DENSITY 512
/*
Mispelled words are flushed from the syntax highlighting rules
when they have been around longer than
TRANSIENT_WORD_TIME_OUT seconds. At a cursor rate of 30
chars per second and say 3 chars + a space per word, we can
accumulate 450 words absolute max with a value of 60. This is
below this limit of 1024 words in a context.
*/
#define TRANSIENT_WORD_TIME_OUT 60
#define UNKNOWN_FORMAT "unknown"
#ifdef HAVE_SYNTAXH
int option_syntax_highlighting = 1;
int option_auto_spellcheck = 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);
#ifdef HAVE_MAD
static void *mad_syntax_malloc (size_t x, char *file, int line)
#define syntax_malloc(x) mad_syntax_malloc (x, __FILE__, __LINE__)
#else
static void *syntax_malloc (size_t x)
#endif
{
void *p;
#ifdef HAVE_MAD
p = mad_alloc (x, file, line);
#else
p = malloc (x);
#endif
memset (p, 0, x);
return p;
}
#define syntax_free(x) {if(x){free(x);(x)=0;}}
#define syntax_g_free(x) {if(x){g_free(x);(x)=0;}}
static long compare_word_to_right (WEdit * edit, long i, char *text, char *whole_left, char *whole_right, int line_start)
{
unsigned char *p, *q;
int c, d, j;
if (!*text)
return -1;
c = edit_get_byte (edit, i - 1);
if (line_start)
if (c != '\n')
return -1;
if (whole_left)
if (strchr (whole_left, c))
return -1;
for (p = (unsigned char *) text, q = p + strlen ((char *) p); p < q; p++, i++) {
switch (*p) {
case '\001':
p++;
for (;;) {
c = edit_get_byte (edit, i);
if (!*p)
if (whole_right)
if (!strchr (whole_right, c))
break;
if (c == *p)
break;
if (c == '\n')
return -1;
i++;
}
break;
case '\002':
p++;
j = 0;
for (;;) {
c = edit_get_byte (edit, i);
if (c == *p) {
j = i;
if (*p == *text && !p[1]) /* handle eg '+' and @+@ keywords properly */
break;
}
if (j && strchr ((char *) p + 1, c)) /* c exists further down, so it will get matched later */
break;
if (c == '\n' || c == '\t' || c == ' ') {
if (!*p) {
i--;
break;
}
if (!j)
return -1;
i = j;
break;
}
if (whole_right)
if (!strchr (whole_right, c)) {
if (!*p) {
i--;
break;
}
if (!j)
return -1;
i = j;
break;
}
i++;
}
break;
case '\003':
p++;
c = -1;
for (;; i++) {
d = c;
c = edit_get_byte (edit, i);
for (j = 0; p[j] != '\003'; j++)
if (c == p[j])
goto found_char2;
break;
found_char2:
j = c; /* dummy command */
}
i--;
while (*p != '\003')
p++;
if (p[1] == d)
i--;
break;
case '\004':
p++;
c = edit_get_byte (edit, i);
for (; *p != '\004'; p++)
if (c == *p)
goto found_char3;
return -1;
found_char3:
for (; *p != '\004'; p++);
break;
default:
if (*p != edit_get_byte (edit, i))
return -1;
}
}
if (whole_right)
if (strchr (whole_right, edit_get_byte (edit, i)))
return -1;
return i;
}
#define XXX \
if (*s < '\005' || *s == (unsigned char) c) \
goto done; \
s++;
static inline char *xx_strchr (const unsigned char *s, int c)
{
repeat:
XXX XXX XXX XXX XXX XXX XXX XXX;
XXX XXX XXX XXX XXX XXX XXX XXX;
goto repeat;
done:
return (char *) s;
}
static inline struct syntax_rule apply_rules_going_right (WEdit * edit, long i, struct syntax_rule rule)
{
struct context_rule *r;
int contextchanged = 0, c;
int found_right = 0, found_left = 0, keyword_foundleft = 0, keyword_foundright = 0;
int is_end;
long end = 0;
struct syntax_rule _rule = rule;
if (!(c = edit_get_byte (edit, i)))
return rule;
is_end = (rule.end == (unsigned char) i);
/* check to turn off a keyword */
if (_rule.keyword) {
struct key_word *k;
k = edit->rules[_rule.context]->keyword[_rule.keyword];
if (edit_get_byte (edit, i - 1) == '\n')
_rule.keyword = 0;
if (is_end) {
_rule.keyword = 0;
keyword_foundleft = 1;
}
}
/* check to turn off a context */
if (_rule.context && !_rule.keyword) {
long e;
r = edit->rules[_rule.context];
if (r->first_right == c && !(rule.border & RULE_ON_RIGHT_BORDER) && (e = compare_word_to_right (edit, i, r->right, r->whole_word_chars_left, r->whole_word_chars_right, r->line_start_right)) > 0) {
_rule.end = e;
found_right = 1;
_rule.border = RULE_ON_RIGHT_BORDER;
if (r->between_delimiters)
_rule.context = 0;
} else if (is_end && rule.border & RULE_ON_RIGHT_BORDER) {
/* always turn off a context at 4 */
found_left = 1;
_rule.border = 0;
if (!keyword_foundleft)
_rule.context = 0;
} else if (is_end && rule.border & RULE_ON_LEFT_BORDER) {
/* never turn off a context at 2 */
found_left = 1;
_rule.border = 0;
}
}
/* check to turn on a keyword */
if (!_rule.keyword) {
char *p;
p = (r = edit->rules[_rule.context])->keyword_first_chars;
if (p)
while (*(p = xx_strchr ((unsigned char *) p + 1, c))) {
struct key_word *k;
int count;
long e;
count = p - r->keyword_first_chars;
k = r->keyword[count];
e = compare_word_to_right (edit, i, k->keyword, k->whole_word_chars_left, k->whole_word_chars_right, k->line_start);
if (e > 0) {
end = e;
_rule.end = e;
_rule.keyword = count;
keyword_foundright = 1;
break;
}
}
}
/* check to turn on a context */
if (!_rule.context) {
if (!found_left && is_end) {
if (rule.border & RULE_ON_RIGHT_BORDER) {
_rule.border = 0;
_rule.context = 0;
contextchanged = 1;
_rule.keyword = 0;
} else if (rule.border & RULE_ON_LEFT_BORDER) {
r = edit->rules[_rule._context];
_rule.border = 0;
if (r->between_delimiters) {
long e;
_rule.context = _rule._context;
contextchanged = 1;
_rule.keyword = 0;
if (r->first_right == c && (e = compare_word_to_right (edit, i, r->right, r->whole_word_chars_left, r->whole_word_chars_right, r->line_start_right)) >= end) {
_rule.end = e;
found_right = 1;
_rule.border = RULE_ON_RIGHT_BORDER;
_rule.context = 0;
}
}
}
}
if (!found_right) {
int count;
struct context_rule **rules = edit->rules;
for (count = 1; rules[count]; count++) {
r = rules[count];
if (r->first_left == c) {
long e;
e = compare_word_to_right (edit, i, r->left, r->whole_word_chars_left, r->whole_word_chars_right, r->line_start_left);
if (e >= end && (!_rule.keyword || keyword_foundright)) {
_rule.end = e;
found_right = 1;
_rule.border = RULE_ON_LEFT_BORDER;
_rule._context = count;
if (!r->between_delimiters)
if (!_rule.keyword)
_rule.context = count;
break;
}
}
}
}
}
/* check again to turn on a keyword if the context switched */
if (contextchanged && !_rule.keyword) {
char *p;
p = (r = edit->rules[_rule.context])->keyword_first_chars;
while (*(p = xx_strchr ((unsigned char *) p + 1, c))) {
struct key_word *k;
int count;
long e;
count = p - r->keyword_first_chars;
k = r->keyword[count];
e = compare_word_to_right (edit, i, k->keyword, k->whole_word_chars_left, k->whole_word_chars_right, k->line_start);
if (e > 0) {
_rule.end = e;
_rule.keyword = count;
break;
}
}
}
return _rule;
}
static struct syntax_rule edit_get_rule (WEdit * edit, long byte_index)
{
long i;
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);
if (i > (edit->syntax_marker ? edit->syntax_marker->offset + SYNTAX_MARKER_DENSITY : SYNTAX_MARKER_DENSITY)) {
struct _syntax_marker *s;
s = edit->syntax_marker;
edit->syntax_marker = syntax_malloc (sizeof (struct _syntax_marker));
edit->syntax_marker->next = s;
edit->syntax_marker->offset = i;
edit->syntax_marker->rule = edit->rule;
}
}
} else if (byte_index < edit->last_get_rule) {
struct _syntax_marker *s;
for (;;) {
if (!edit->syntax_marker) {
memset (&edit->rule, 0, sizeof (edit->rule));
for (i = -1; i <= byte_index; i++)
edit->rule = apply_rules_going_right (edit, i, edit->rule);
break;
}
if (byte_index >= edit->syntax_marker->offset) {
edit->rule = edit->syntax_marker->rule;
for (i = edit->syntax_marker->offset + 1; i <= byte_index; i++)
edit->rule = apply_rules_going_right (edit, i, edit->rule);
break;
}
s = edit->syntax_marker->next;
syntax_free (edit->syntax_marker);
edit->syntax_marker = s;
}
}
edit->last_get_rule = byte_index;
return edit->rule;
}
static void translate_rule_to_color (WEdit * edit, struct syntax_rule rule, int *fg, int *bg)
{
struct key_word *k;
k = edit->rules[rule.context]->keyword[rule.keyword];
*bg = k->bg;
*fg = k->fg;
}
extern int use_colors;
void edit_get_syntax_color (WEdit * edit, long byte_index, int *fg, int *bg)
{
if (edit->rules && byte_index < edit->last_byte &&
option_syntax_highlighting && use_colors) {
translate_rule_to_color (edit, edit_get_rule (edit, byte_index), fg, bg);
} else {
*fg = EDITOR_NORMAL_COLOR;
}
}
/*
Returns 0 on error/eof or a count of the number of bytes read
including the newline. Result must be free'd.
*/
#ifdef HAVE_MAD
static int mad_read_one_line (char **line, FILE * f, char *file, int line_)
#define read_one_line(a,b) mad_read_one_line(a,b,__FILE__,__LINE__)
#else
static int read_one_line (char **line, FILE * f)
#endif
{
char *p;
int len = 256, c, r = 0, i = 0;
#ifdef HAVE_MAD
p = mad_syntax_malloc (len, file, line_);
#else
p = syntax_malloc (len);
#endif
for (;;) {
c = fgetc (f);
if (c == EOF) {
if (ferror (f)) {
if (errno == EINTR)
continue;
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 *convert (char *s)
{
char *r, *p;
p = r = s;
while (*s) {
switch (*s) {
case '\\':
s++;
switch (*s) {
case ' ':
*p = ' ';
s--;
break;
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 ']':
*p = '\003';
break;
case '{':
case '}':
*p = '\004';
break;
case 0:
*p = *s;
return r;
default:
*p = *s;
break;
}
break;
case '*':
*p = '\001';
break;
case '+':
*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;
for (;;) {
char *p = l;
while (*p && whiteness (*p))
p++;
if (!*p)
break;
for (l = p + 1; *l && !whiteness (*l); l++);
if (*l)
*l++ = '\0';
*args = convert (p);
(*argc)++;
args++;
}
*args = 0;
}
#define free_args(x)
#define break_a {result=line;break;}
#define check_a {if(!*a){result=line;break;}}
#define check_not_a {if(*a){result=line;break;}}
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 (bg)
if (!*bg)
bg = 0;
if (fg)
if (!*fg)
fg = 0;
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);
}
static char *error_file_name = 0;
extern char *mc_home;
static FILE *open_include_file (char *filename)
{
FILE *f;
syntax_g_free (error_file_name);
error_file_name = g_strdup (filename);
if (*filename == PATH_SEP)
return fopen (filename, "r");
g_free (error_file_name);
error_file_name = g_strconcat (home_dir, EDIT_DIR PATH_SEP_STR,
filename, NULL);
f = fopen (error_file_name, "r");
if (f)
return f;
g_free (error_file_name);
error_file_name = g_strconcat (mc_home, PATH_SEP_STR "syntax" PATH_SEP_STR,
filename, NULL);
return fopen (error_file_name, "r");
}
/* returns line number on error */
static int edit_read_syntax_rules (WEdit * edit, FILE * f)
{
FILE *g = 0;
char *fg, *bg;
char last_fg[32] = "", last_bg[32] = "";
char whole_right[512];
char whole_left[512];
char *args[1024], *l = 0;
int save_line = 0, line = 0;
struct context_rule **r, *c = 0;
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 (MAX_CONTEXTS * sizeof (struct context_rule *));
for (;;) {
char **a;
line++;
l = 0;
if (!read_one_line (&l, f)) {
if (g) {
fclose (f);
f = g;
g = 0;
line = save_line + 1;
syntax_g_free (error_file_name);
if (l)
syntax_free (l);
if (!read_one_line (&l, f))
break;
} else {
break;
}
}
get_args (l, args, &argc);
a = args + 1;
if (!args[0]) {
/* do nothing */
} else if (!strcmp (args[0], "include")) {
if (g || argc != 2) {
result = line;
break;
}
g = f;
f = open_include_file (args[1]);
if (!f) {
syntax_g_free (error_file_name);
result = line;
break;
}
save_line = line;
line = 0;
} 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 */
break_a;
}
a++;
c = r[0] = syntax_malloc (sizeof (struct context_rule));
c->left = (char *) strdup (" ");
c->right = (char *) 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 = (char *) strdup (whole_left);
c->whole_word_chars_right = (char *) strdup (whole_right);
} else if (!strcmp (*a, "wholeleft")) {
a++;
c->whole_word_chars_left = (char *) strdup (whole_left);
} else if (!strcmp (*a, "wholeright")) {
a++;
c->whole_word_chars_right = (char *) strdup (whole_right);
}
check_a;
if (!strcmp (*a, "linestart")) {
a++;
c->line_start_left = 1;
}
check_a;
c->left = (char *) strdup (*a++);
check_a;
if (!strcmp (*a, "linestart")) {
a++;
c->line_start_right = 1;
}
check_a;
c->right = (char *) strdup (*a++);
c->first_left = *c->left;
c->first_right = *c->right;
#if 0
c->single_char = (strlen (c->right) == 1);
#endif
}
c->keyword = syntax_malloc (MAX_WORDS_PER_CONTEXT * sizeof (struct key_word *));
#if 0
c->max_words = MAX_WORDS_PER_CONTEXT;
#endif
num_words = 1;
c->keyword[0] = syntax_malloc (sizeof (struct key_word));
fg = *a;
if (*a)
a++;
bg = *a;
if (*a)
a++;
strcpy (last_fg, fg ? fg : "");
strcpy (last_bg, bg ? bg : "");
c->keyword[0]->fg = this_try_alloc_color_pair (fg, bg);
c->keyword[0]->keyword = (char *) strdup (" ");
check_not_a;
num_contexts++;
} else if (!strcmp (args[0], "spellcheck")) {
if (!c) {
result = line;
break;
}
c->spelling = 1;
} else if (!strcmp (args[0], "keyword")) {
struct key_word *k;
if (num_words == -1)
break_a;
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 = (char *) strdup (whole_left);
k->whole_word_chars_right = (char *) strdup (whole_right);
} else if (!strcmp (*a, "wholeleft")) {
a++;
k->whole_word_chars_left = (char *) strdup (whole_left);
} else if (!strcmp (*a, "wholeright")) {
a++;
k->whole_word_chars_right = (char *) strdup (whole_right);
}
check_a;
if (!strcmp (*a, "linestart")) {
a++;
k->line_start = 1;
}
check_a;
if (!strcmp (*a, "whole")) {
break_a;
}
k->keyword = (char *) strdup (*a++);
k->first = *k->keyword;
fg = *a;
if (*a)
a++;
bg = *a;
if (*a)
a++;
if (!fg)
fg = last_fg;
if (!bg)
bg = last_bg;
k->fg = this_try_alloc_color_pair (fg, bg);
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 */
break_a;
}
free_args (args);
syntax_free (l);
}
free_args (args);
syntax_free (l);
if (!edit->rules[0])
syntax_free (edit->rules);
if (result)
return result;
if (num_contexts == -1) {
result = line;
return result;
}
{
char first_chars[MAX_WORDS_PER_CONTEXT + 2], *p;
for (i = 0; edit->rules[i]; i++) {
c = edit->rules[i];
p = first_chars;
*p++ = (char) 1;
for (j = 1; c->keyword[j]; j++)
*p++ = c->keyword[j]->first;
*p = '\0';
c->keyword_first_chars = syntax_malloc (strlen (first_chars) + 2);
strcpy (c->keyword_first_chars, first_chars);
}
}
return result;
}
int edit_check_spelling (WEdit * edit)
{
return 0;
}
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;
edit_get_rule (edit, -1);
syntax_free (edit->syntax_type);
edit->syntax_type = 0;
if (syntax_change_callback)
(*syntax_change_callback) (&edit->widget);
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]->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]);
}
while (edit->syntax_marker) {
struct _syntax_marker *s = edit->syntax_marker->next;
syntax_free (edit->syntax_marker);
edit->syntax_marker = s;
}
syntax_free (edit->rules);
}
/* 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 *first_line, char *type)
{
FILE *f;
regex_t r;
regmatch_t pmatch[1];
char *args[1024], *l = 0;
int line = 0;
int argc;
int result = 0;
int count = 0;
char *lib_file;
lib_file = concat_dir_and_file (mc_home, "syntax" PATH_SEP_STR "Syntax");
check_for_default (lib_file, syntax_file);
g_free (lib_file);
f = fopen (syntax_file, "r");
if (!f)
return -1;
args[0] = 0;
for (;;) {
line++;
syntax_free (l);
if (!read_one_line (&l, f))
break;
get_args (l, args, &argc);
if (!args[0])
continue;
/* looking for `file ...' lines only */
if (strcmp (args[0], "file")) {
free_args (args);
continue;
}
/* must have two args or report error */
if (!args[1] || !args[2]) {
result = line;
break;
}
if (names) {
/* 1: just collecting a list of names of rule sets */
names[count++] = (char *) strdup (args[2]);
names[count] = 0;
} else if (type) {
/* 2: rule set was explicitly specified by the caller */
if (!strcmp (type, args[2]))
goto found_type;
} else if (editor_file && edit) {
/* 3: auto-detect rule set from regular expressions */
int q;
if (regcomp (&r, args[1], REG_EXTENDED)) {
result = line;
break;
}
/* does filename match arg 1 ? */
q = !regexec (&r, editor_file, 1, pmatch, 0);
regfree (&r);
if (!q && args[3]) {
if (regcomp (&r, args[3], REG_EXTENDED)) {
result = line;
break;
}
/* does first line match arg 3 ? */
q = !regexec (&r, first_line, 1, pmatch, 0);
regfree (&r);
}
if (q) {
int line_error;
found_type:
line_error = edit_read_syntax_rules (edit, f);
if (line_error) {
if (!error_file_name) /* an included file */
result = line + line_error;
else
result = line_error;
} else {
syntax_free (edit->syntax_type);
edit->syntax_type = (char *) strdup (args[2]);
/* if there are no rules then turn off syntax highlighting for speed */
if (!edit->rules[1])
if (!edit->rules[0]->keyword[1] && !edit->rules[0]->spelling) {
edit_free_syntax_rules (edit);
break;
}
/* notify the callback of a change in rule set */
if (syntax_change_callback)
(*syntax_change_callback) (&edit->widget);
}
break;
}
}
free_args (args);
}
free_args (args);
syntax_free (l);
fclose (f);
return result;
}
static char *get_first_editor_line (WEdit * edit)
{
int i;
static char s[256];
s[0] = '\0';
if (!edit)
return s;
for (i = 0; i < 255; i++) {
s[i] = edit_get_byte (edit, i);
if (s[i] == '\n') {
s[i] = '\0';
break;
}
}
s[255] = '\0';
return s;
}
/* 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);
if (!option_syntax_highlighting)
return;
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, get_first_editor_line (edit), type);
if (r == -1) {
edit_free_syntax_rules (edit);
edit_error_dialog (_ (" Load syntax file "), _ (" File access error "));
return;
}
if (r) {
edit_free_syntax_rules (edit);
message (0, _(" Load syntax file "),
_(" Error in file %s on line %d "),
error_file_name ? error_file_name : f, r);
syntax_g_free (error_file_name);
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;
}
int edit_check_spelling (WEdit * edit)
{
return 0;
}
#endif /* HAVE_SYNTAXH */
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