add.c: move pathspec matchers into new pathspec.c for reuse
[git/git.git] / pathspec.c
CommitLineData
6f525e71
AS
1#include "cache.h"
2#include "dir.h"
3#include "pathspec.h"
4
5/*
6 * Finds which of the given pathspecs match items in the index.
7 *
8 * For each pathspec, sets the corresponding entry in the seen[] array
9 * (which should be specs items long, i.e. the same size as pathspec)
10 * to the nature of the "closest" (i.e. most specific) match found for
11 * that pathspec in the index, if it was a closer type of match than
12 * the existing entry. As an optimization, matching is skipped
13 * altogether if seen[] already only contains non-zero entries.
14 *
15 * If seen[] has not already been written to, it may make sense
16 * to use find_used_pathspec() instead.
17 */
18void fill_pathspec_matches(const char **pathspec, char *seen, int specs)
19{
20 int num_unmatched = 0, i;
21
22 /*
23 * Since we are walking the index as if we were walking the directory,
24 * we have to mark the matched pathspec as seen; otherwise we will
25 * mistakenly think that the user gave a pathspec that did not match
26 * anything.
27 */
28 for (i = 0; i < specs; i++)
29 if (!seen[i])
30 num_unmatched++;
31 if (!num_unmatched)
32 return;
33 for (i = 0; i < active_nr; i++) {
34 struct cache_entry *ce = active_cache[i];
35 match_pathspec(pathspec, ce->name, ce_namelen(ce), 0, seen);
36 }
37}
38
39/*
40 * Finds which of the given pathspecs match items in the index.
41 *
42 * This is a one-shot wrapper around fill_pathspec_matches() which
43 * allocates, populates, and returns a seen[] array indicating the
44 * nature of the "closest" (i.e. most specific) matches which each of
45 * the given pathspecs achieves against all items in the index.
46 */
47char *find_used_pathspec(const char **pathspec)
48{
49 char *seen;
50 int i;
51
52 for (i = 0; pathspec[i]; i++)
53 ; /* just counting */
54 seen = xcalloc(i, 1);
55 fill_pathspec_matches(pathspec, seen, i);
56 return seen;
57}