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dir.c: provide clear_directory() for reclaiming dir_struct memory 

By the end of a directory traversal, a dir_struct instance will
typically contains pointers to various data structures on the heap.
clear_directory() provides a convenient way to reclaim that memory.

Signed-off-by: Adam Spiers <git@adamspiers.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Adam Spiers 2013-01-06 16:58:05 +00:00 committed by Junio C Hamano
parent c04318e46a
commit 270be81604
3 changed files with 33 additions and 0 deletions
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2
Documentation/technical/api-directory-listing.txt
View File

@ -81,4 +81,6 @@ marked. If you to exclude files, make sure you have loaded index first.
* Use `dir.entries[]`.
* Call `free_directory()` when none of the contained elements are no longer in use.
(JC)

30
dir.c
View File

@ -1557,3 +1557,33 @@ void free_pathspec(struct pathspec *pathspec)
free(pathspec->items);
pathspec->items = NULL;
}
/*
* Frees memory within dir which was allocated for exclude lists and
* the exclude_stack. Does not free dir itself.
*/
void clear_directory(struct dir_struct *dir)
{
int i, j;
struct exclude_list_group *group;
struct exclude_list *el;
struct exclude_stack *stk;
for (i = EXC_CMDL; i <= EXC_FILE; i++) {
group = &dir->exclude_list_group[i];
for (j = 0; j < group->nr; j++) {
el = &group->el[j];
if (i == EXC_DIRS)
free((char *)el->src);
clear_exclude_list(el);
}
free(group->el);
}
stk = dir->exclude_stack;
while (stk) {
struct exclude_stack *prev = stk->prev;
free(stk);
stk = prev;
}
}

1
dir.h
View File

@ -169,6 +169,7 @@ extern void parse_exclude_pattern(const char **string, int *patternlen, int *fla
extern void add_exclude(const char *string, const char *base,
int baselen, struct exclude_list *el, int srcpos);
extern void clear_exclude_list(struct exclude_list *el);
extern void clear_directory(struct dir_struct *dir);
extern int file_exists(const char *);
extern int is_inside_dir(const char *dir);