string_list: add a new function, filter_string_list()

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

View File

@ -29,6 +29,15 @@ int for_each_string_list(struct string_list *list,
#define for_each_string_list_item(item,list) \
for (item = (list)->items; item < (list)->items + (list)->nr; ++item)
/*
* Apply want to each item in list, retaining only the ones for which
* the function returns true. If free_util is true, call free() on
* the util members of any items that have to be deleted. Preserve
* the order of the items that are retained.
*/
void filter_string_list(struct string_list *list, int free_util,
string_list_each_func_t want, void *cb_data);
/* Use these functions only on sorted lists: */
int string_list_has_string(const struct string_list *list, const char *string);