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string_list: add a new function, filter_string_list()

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This function allows entries that don't match a specified criterion to
be discarded from a string_list while preserving the order of the
remaining entries.

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Michael Haggerty
2012-09-12 16:04:44 +02:00
committed by Junio C Hamano
parent ff919f965d
commit eb5f0c7a61
5 changed files with 96 additions and 0 deletions
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17
string-list.c
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@@ -102,6 +102,23 @@ int for_each_string_list(struct string_list *list,
return ret;
}
void filter_string_list(struct string_list *list, int free_util,
string_list_each_func_t want, void *cb_data)
{
int src, dst = 0;
for (src = 0; src < list->nr; src++) {
if (want(&list->items[src], cb_data)) {
list->items[dst++] = list->items[src];
} else {
if (list->strdup_strings)
free(list->items[src].string);
if (free_util)
free(list->items[src].util);
}
}
list->nr = dst;
}
void string_list_clear(struct string_list *list, int free_util)
{
if (list->items) {