Syntax file crush mc

["Andrew V. Samoilov" <kai cmail ru>]

Hi!

Some minutes ago I committed patch below.
This one fixes crush in built-in editor with syntax highlighting
if Syntax file contain lines like

\s+ \n lightgray/13 red

But this 4 line Syntax file and many others still crush mc.

# syntax rules version 62

file .\*ChangeLog$ GNU\sDistribution\sChangeLog\sFile
# context [\ \t]+ \n lightgray/13 
# end of Syntax.

(Hopeless attempt to highlight trailing whitespace(s)).

It seems something corrupts stack in syntax.c. 
Unfortunately I have no time to hint this bug.
I am going to Moscow for 2-3 weeks and will have limited access
to Internet.

Regards,
Andrew.

Index: mc/edit/ChangeLog
diff -u mc/edit/ChangeLog:1.29 mc/edit/ChangeLog:1.30
--- mc/edit/ChangeLog:1.29	Tue Nov 27 07:38:30 2001
+++ mc/edit/ChangeLog	Wed Nov 28 07:40:18 2001
@@ -1,3 +1,19 @@
+2001-11-28  Andrew V. Samoilov  <kai cmail ru>
+
+	* syntax.c (apply_rules_going_right): Fix crush for lines like
+	\s+ \n lightgray/13 red
+	in Syntax file.
+	(read_one_line): Use EOF instead of -1.
+	(get_args): Fix buffer overflow for l without trailing
+	whitespace(s).
+	(break_a): New macro.
+	(edit_read_syntax_rules): Use break_a to fix memory leaks.
+	(edit_load_syntax): Eliminate s and use message to prevent
+	buffer overflow.
+
+	* editdraw.c (edit_render): Eliminate f. It's only written
+	but never read.
+
 2001-11-27  Andrew V. Samoilov  <kai cmail ru>
 
 	* editmenu.c (edit_wrap_cmd): Use g_free() on the result
Index: mc/edit/syntax.c
diff -u mc/edit/syntax.c:1.17 mc/edit/syntax.c:1.18
--- mc/edit/syntax.c:1.17	Tue Sep 11 17:44:52 2001
+++ mc/edit/syntax.c	Wed Nov 28 07:40:18 2001
@@ -238,6 +238,7 @@
     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;
@@ -402,7 +403,7 @@
 #endif
     for (;;) {
 	c = fgetc (f);
-	if (c == -1) {
+	if (c == EOF) {
 	    if (errno == EINTR)
 		continue;
 	    r = 0;
@@ -493,14 +494,15 @@
 static void get_args (char *l, char **args, int *argc)
 {
     *argc = 0;
-    l--;
     for (;;) {
-	char *p;
-	for (p = l + 1; *p && whiteness (*p); p++);
+	char *p = l;
+	while (*p && whiteness (*p))
+	    p++;
 	if (!*p)
 	    break;
 	for (l = p + 1; *l && !whiteness (*l); l++);
-	*l = '\0';
+	if (*l)
+	    *l++ = '\0';
 	*args = strdup_convert (p);
 	(*argc)++;
 	args++;
@@ -512,11 +514,11 @@
 {
     while (*args) {
 	syntax_free (*args);
-	*args = 0;
 	args++;
     }
 }
 
+#define break_a	{result=line;break;}
 #define check_a {if(!*a){result=line;break;}}
 #define check_not_a {if(*a){result=line;break;}}
 
@@ -653,8 +655,7 @@
 	    check_a;
 	    if (num_contexts == -1) {
 		if (strcmp (*a, "default")) {	/* first context is the default */
-		    *a = 0;
-		    check_a;
+		    break_a;
 		}
 		a++;
 		c = r[0] = syntax_malloc (sizeof (struct context_rule));
@@ -724,7 +725,7 @@
 	} else if (!strcmp (args[0], "keyword")) {
 	    struct key_word *k;
 	    if (num_words == -1)
-		*a = 0;
+		break_a;
 	    check_a;
 	    k = r[num_contexts - 1]->keyword[num_words] = syntax_malloc (sizeof (struct key_word));
 	    if (!strcmp (*a, "whole")) {
@@ -745,8 +746,7 @@
 	    }
 	    check_a;
 	    if (!strcmp (*a, "whole")) {
-		*a = 0;
-		check_a;
+		break_a;
 	    }
 	    k->keyword = (char *) strdup (*a++);
 	    k->first = *k->keyword;
@@ -768,8 +768,7 @@
 	} else if (!strcmp (args[0], "file")) {
 	    break;
 	} else {		/* anything else is an error */
-	    *a = 0;
-	    check_a;
+	    break_a;
 	}
 	free_args (args);
 	syntax_free (l);
@@ -998,10 +997,10 @@
 	return;
     }
     if (r) {
-	char s[80];
 	edit_free_syntax_rules (edit);
-	sprintf (s, _ (" Error in file %s on line %d "), error_file_name ? error_file_name : f, r);
-	edit_error_dialog (_ (" Load syntax file "), s);
+	message (0, _(" Load syntax file "), 
+		    _(" Error in file %s on line %d "),
+		    error_file_name ? error_file_name : f, r);
 	syntax_free (error_file_name);
 	return;
     }