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         }
  33         return 0;
  34 }
  35
  36 void diffcore_pathspec(const char **pathspec)
  37 {
  38         struct diff_queue_struct *q = &diff_queued_diff;
  39         int i, speccnt;
  40         struct diff_queue_struct outq;
  41         struct path_spec *spec;
  42
  43         outq.queue = NULL;
  44         outq.nr = outq.alloc = 0;
  45
  46         for (i = 0; pathspec[i]; i++)
  47                 ;
  48         speccnt = i;
  49         spec = xmalloc(sizeof(*spec) * speccnt);
  50         for (i = 0; pathspec[i]; i++) {
  51                 spec[i].spec = pathspec[i];
  52                 spec[i].len = strlen(pathspec[i]);
  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 }