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 (! strncmp(s[i].spec, name, len) &&
  25                     len <= namelen &&
  26                     (name[len] == 0 || name[len] == '/'))
  27                         return 1;
  28         }
  29         return 0;
  30 }
  31
  32 void diffcore_pathspec(const char **pathspec)
  33 {
  34         struct diff_queue_struct *q = &diff_queued_diff;
  35         int i, speccnt;
  36         struct diff_queue_struct outq;
  37         struct path_spec *spec;
  38
  39         outq.queue = NULL;
  40         outq.nr = outq.alloc = 0;
  41
  42         for (i = 0; pathspec[i]; i++)
  43                 ;
  44         speccnt = i;
  45         spec = xmalloc(sizeof(*spec) * speccnt);
  46         for (i = 0; pathspec[i]; i++) {
  47                 int l;
  48                 spec[i].spec = pathspec[i];
  49                 l = strlen(pathspec[i]);
  50                 while (l > 0 && pathspec[i][l-1] == '/')
  51                         l--;
  52                 spec[i].len = l;
  53         }
  54
  55         for (i = 0; i < q->nr; i++) {
  56                 struct diff_filepair *p = q->queue[i];
  57                 if (matches_pathspec(p->two->path, spec, speccnt))
  58                         diff_q(&outq, p);
  59                 else
  60                         diff_free_filepair(p);
  61         }
  62         free(q->queue);
  63         *q = outq;
  64         return;
  65 }