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string_list: add function string_list_append_nodup()

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Add a new function that appends a string to a string_list without
copying it.  This can be used to pass ownership of an already-copied
string to a string_list that has strdup_strings set.

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 16:04:42 +02:00
committed by Junio C Hamano
parent 0ce9864461
commit e448fed8e6
3 changed files with 47 additions and 8 deletions
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20
string-list.c
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@ -148,13 +148,23 @@ void print_string_list(const struct string_list *p, const char *text)
printf("%s:%p\n", p->items[i].string, p->items[i].util);
}
struct string_list_item *string_list_append(struct string_list *list, const char *string)
struct string_list_item *string_list_append_nodup(struct string_list *list,
char *string)
{
struct string_list_item *retval;
ALLOC_GROW(list->items, list->nr + 1, list->alloc);
list->items[list->nr].string =
list->strdup_strings ? xstrdup(string) : (char *)string;
list->items[list->nr].util = NULL;
return list->items + list->nr++;
retval = &list->items[list->nr++];
retval->string = string;
retval->util = NULL;
return retval;
}
struct string_list_item *string_list_append(struct string_list *list,
const char *string)
{
return string_list_append_nodup(
list,
list->strdup_strings ? xstrdup(string) : (char *)string);
}
static int cmp_items(const void *a, const void *b)