diffcore-delta.c

   1 #include "cache.h"
   2 #include "diff.h"
   3 #include "diffcore.h"
   4 #include "delta.h"
   5 #include "count-delta.h"
   6
   7 static int diffcore_count_changes_1(void *src, unsigned long src_size,
   8                                     void *dst, unsigned long dst_size,
   9                                     unsigned long delta_limit,
  10                                     unsigned long *src_copied,
  11                                     unsigned long *literal_added)
  12 {
  13         void *delta;
  14         unsigned long delta_size;
  15
  16         delta = diff_delta(src, src_size,
  17                            dst, dst_size,
  18                            &delta_size, delta_limit);
  19         if (!delta)
  20                 /* If delta_limit is exceeded, we have too much differences */
  21                 return -1;
  22
  23         /* Estimate the edit size by interpreting delta. */
  24         if (count_delta(delta, delta_size, src_copied, literal_added)) {
  25                 free(delta);
  26                 return -1;
  27         }
  28         free(delta);
  29         return 0;
  30 }
  31
  32 int diffcore_count_changes(void *src, unsigned long src_size,
  33                            void *dst, unsigned long dst_size,
  34                            unsigned long delta_limit,
  35                            unsigned long *src_copied,
  36                            unsigned long *literal_added)
  37 {
  38         return diffcore_count_changes_1(src, src_size,
  39                                         dst, dst_size,
  40                                         delta_limit,
  41                                         src_copied,
  42                                         literal_added);
  43 }