Make networking commands to work from a subdirectory.
[git] / diffcore-pathspec.c
1 /*
2  * Copyright (C) 2005 Junio C Hamano
3  */
4 #include "cache.h"
5 #include "diff.h"
6 #include "diffcore.h"
7
8 struct path_spec {
9         const char *spec;
10         int len;
11 };
12
13 static int matches_pathspec(const char *name, struct path_spec *s, int cnt)
14 {
15         int i;
16         int namelen;
17
18         if (cnt == 0)
19                 return 1;
20
21         namelen = strlen(name);
22         for (i = 0; i < cnt; i++) {
23                 int len = s[i].len;
24                 if (namelen < len)
25                         continue;
26                 if (memcmp(s[i].spec, name, len))
27                         continue;
28                 if (s[i].spec[len-1] == '/' ||
29                     name[len] == 0 ||
30                     name[len] == '/')
31                         return 1;
32                 if (!len)
33                         return 1;
34         }
35         return 0;
36 }
37
38 void diffcore_pathspec(const char **pathspec)
39 {
40         struct diff_queue_struct *q = &diff_queued_diff;
41         int i, speccnt;
42         struct diff_queue_struct outq;
43         struct path_spec *spec;
44
45         outq.queue = NULL;
46         outq.nr = outq.alloc = 0;
47
48         for (i = 0; pathspec[i]; i++)
49                 ;
50         speccnt = i;
51         spec = xmalloc(sizeof(*spec) * speccnt);
52         for (i = 0; pathspec[i]; i++) {
53                 spec[i].spec = pathspec[i];
54                 spec[i].len = strlen(pathspec[i]);
55         }
56
57         for (i = 0; i < q->nr; i++) {
58                 struct diff_filepair *p = q->queue[i];
59                 if (matches_pathspec(p->two->path, spec, speccnt))
60                         diff_q(&outq, p);
61                 else
62                         diff_free_filepair(p);
63         }
64         free(q->queue);
65         *q = outq;
66         return;
67 }