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rcfile: don't store a coloring rule before it is complete 

This really fixes https://savannah.gnu.org/bugs/?57950.
This commit is contained in:
Benno Schulenberg 2020-03-04 16:08:34 +01:00
parent 6bab8d19c6
commit d675a549de
1 changed files with 27 additions and 24 deletions
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51
src/rcfile.c
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@ -1062,6 +1062,8 @@ void parse_rule(char *ptr, int rex_flags)
}
while (*ptr != '\0') {
regex_t *start_rgx = NULL, *end_rgx = NULL;
/* Intermediate storage for compiled regular expressions. */
colortype *newcolor = NULL;
/* Container for a regex (or regex pair) and the color it paints. */
bool expectend = FALSE;
@ -1078,18 +1080,37 @@ void parse_rule(char *ptr, int rex_flags)
if (ptr == NULL)
return;
/* When the regex is invalid, abandon the rule. */
if (!compile(regexstring, rex_flags, &start_rgx))
return;
if (expectend) {
if (strncmp(ptr, "end=", 4) != 0) {
jot_error(N_("\"start=\" requires a corresponding \"end=\""));
regfree(start_rgx);
free(start_rgx);
return;
}
regexstring = ptr + 5;
ptr = parse_next_regex(ptr + 5);
/* When there is no valid end= regex, abandon the rule. */
if (ptr == NULL || !compile(regexstring, rex_flags, &end_rgx)) {
regfree(start_rgx);
free(start_rgx);
return;
}
}
newcolor = (colortype *)nmalloc(sizeof(colortype));
/* When the regex is invalid, abandon the rule. */
if (!compile(regexstring, rex_flags, &newcolor->start)) {
free(newcolor);
return;
}
newcolor->start = start_rgx;
newcolor->end = end_rgx;
newcolor->fg = fg;
newcolor->bg = bg;
newcolor->attributes = attributes;
newcolor->end = NULL;
if (lastcolor == NULL)
live_syntax->color = newcolor;
@ -1102,24 +1123,6 @@ void parse_rule(char *ptr, int rex_flags)
if (!expectend)
continue;
if (strncmp(ptr, "end=", 4) != 0) {
jot_error(N_("\"start=\" requires a corresponding \"end=\""));
return;
}
regexstring = ptr + 5;
ptr = parse_next_regex(ptr + 5);
if (ptr == NULL)
return;
/* When the end= regex is invalid, abandon the whole rule. */
if (!compile(regexstring, rex_flags, &newcolor->end)) {
regfree(newcolor->start);
free(newcolor);
return;
}
/* Lame way to skip another static counter. */
newcolor->id = live_syntax->nmultis;
live_syntax->nmultis++;