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 #include "delta.h"
   8
   9 struct path_spec {
  10         const char *spec;
  11         int len;
  12 };
  13
  14 static int matches_pathspec(const char *name, struct path_spec *s, int cnt)
  15 {
  16         int i;
  17         int namelen;
  18
  19         if (cnt == 0)
  20                 return 1;
  21
  22         namelen = strlen(name);
  23         for (i = 0; i < cnt; i++) {
  24                 int len = s->len;
  25                 if (! strncmp(s->spec, name, len) &&
  26                     len <= namelen &&
  27                     (name[len] == 0 || name[len] == '/'))
  28                         return 1;
  29         }
  30         return 0;
  31 }
  32
  33 void diffcore_pathspec(const char **pathspec)
  34 {
  35         struct diff_queue_struct *q = &diff_queued_diff;
  36         int i, speccnt;
  37         struct diff_queue_struct outq;
  38         struct path_spec *spec;
  39
  40         outq.queue = NULL;
  41         outq.nr = outq.alloc = 0;
  42
  43         for (i = 0; pathspec[i]; i++)
  44                 ;
  45         speccnt = i;
  46         spec = xmalloc(sizeof(*spec) * speccnt);
  47         for (i = 0; pathspec[i]; i++) {
  48                 spec[i].spec = pathspec[i];
  49                 spec[i].len = strlen(pathspec[i]);
  50         }
  51
  52         for (i = 0; i < q->nr; i++) {
  53                 struct diff_filepair *p = q->queue[i];
  54                 if (matches_pathspec(p->one->path, spec, speccnt) ||
  55                     matches_pathspec(p->two->path, spec, speccnt))
  56                         diff_q(&outq, p);
  57                 else
  58                         free(p);
  59         }
  60         free(q->queue);
  61         *q = outq;
  62         return;
  63 }