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         if (!speccnt)
  52                 return;
  53
  54         spec = xmalloc(sizeof(*spec) * speccnt);
  55         for (i = 0; pathspec[i]; i++) {
  56                 spec[i].spec = pathspec[i];
  57                 spec[i].len = strlen(pathspec[i]);
  58         }
  59
  60         for (i = 0; i < q->nr; i++) {
  61                 struct diff_filepair *p = q->queue[i];
  62                 if (matches_pathspec(p->two->path, spec, speccnt))
  63                         diff_q(&outq, p);
  64                 else
  65                         diff_free_filepair(p);
  66         }
  67         free(q->queue);
  68         *q = outq;
  69         return;
  70 }