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config: arbitrary number of matches for --unset and --replace-all

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git-config used a static match array to hold the matches we want to
unset/replace when using --unset or --replace-all.  Use a
variable-sized array instead.

This in particular fixes the symptoms git-svn had when storing large
numbers of svn-remote.*.added-placeholder entries in the config file.

While the tests are rather more paranoid than just --unset and
--replace-all, the other operations already worked.  Indeed git-svn's
usage only breaks the first time *after* creating so many entries,
when it wants to unset and re-add them all.

Reported-by: Jess Hottenstein <jess.hottenstein@gmail.com>
Signed-off-by: Thomas Rast <tr@thomasrast.ch>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Thomas Rast
2013-11-13 11:19:00 +01:00
committed by Junio C Hamano
parent d7d2c87955
commit 83786fa412
2 changed files with 77 additions and 6 deletions
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19
config.c
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@ -1160,15 +1160,14 @@ int git_config(config_fn_t fn, void *data)
* Find all the stuff for git_config_set() below.
*/
#define MAX_MATCHES 512
static struct {
int baselen;
char *key;
int do_not_match;
regex_t *value_regex;
int multi_replace;
size_t offset[MAX_MATCHES];
size_t *offset;
unsigned int offset_alloc;
enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
int seen;
} store;
@ -1191,11 +1190,11 @@ static int store_aux(const char *key, const char *value, void *cb)
if (matches(key, value)) {
if (store.seen == 1 && store.multi_replace == 0) {
warning("%s has multiple values", key);
} else if (store.seen >= MAX_MATCHES) {
error("too many matches for %s", key);
return 1;
}
ALLOC_GROW(store.offset, store.seen + 1,
store.offset_alloc);
store.offset[store.seen] = cf->do_ftell(cf);
store.seen++;
}
@ -1223,11 +1222,15 @@ static int store_aux(const char *key, const char *value, void *cb)
* Do not increment matches: this is no match, but we
* just made sure we are in the desired section.
*/
ALLOC_GROW(store.offset, store.seen + 1,
store.offset_alloc);
store.offset[store.seen] = cf->do_ftell(cf);
/* fallthru */
case SECTION_END_SEEN:
case START:
if (matches(key, value)) {
ALLOC_GROW(store.offset, store.seen + 1,
store.offset_alloc);
store.offset[store.seen] = cf->do_ftell(cf);
store.state = KEY_SEEN;
store.seen++;
@ -1235,6 +1238,9 @@ static int store_aux(const char *key, const char *value, void *cb)
if (strrchr(key, '.') - key == store.baselen &&
!strncmp(key, store.key, store.baselen)) {
store.state = SECTION_SEEN;
ALLOC_GROW(store.offset,
store.seen + 1,
store.offset_alloc);
store.offset[store.seen] = cf->do_ftell(cf);
}
}
@ -1533,6 +1539,7 @@ int git_config_set_multivar_in_file(const char *config_filename,
}
}
ALLOC_GROW(store.offset, 1, store.offset_alloc);
store.offset[0] = 0;
store.state = START;
store.seen = 0;