sha1-array.c

   1 #include "cache.h"
   2 #include "sha1-array.h"
   3 #include "sha1-lookup.h"
   4
   5 void oid_array_append(struct oid_array *array, const struct object_id *oid)
   6 {
   7         ALLOC_GROW(array->oid, array->nr + 1, array->alloc);
   8         oidcpy(&array->oid[array->nr++], oid);
   9         array->sorted = 0;
  10 }
  11
  12 static int void_hashcmp(const void *a, const void *b)
  13 {
  14         return oidcmp(a, b);
  15 }
  16
  17 static void oid_array_sort(struct oid_array *array)
  18 {
  19         QSORT(array->oid, array->nr, void_hashcmp);
  20         array->sorted = 1;
  21 }
  22
  23 static const unsigned char *sha1_access(size_t index, void *table)
  24 {
  25         struct object_id *array = table;
  26         return array[index].hash;
  27 }
  28
  29 int oid_array_lookup(struct oid_array *array, const struct object_id *oid)
  30 {
  31         if (!array->sorted)
  32                 oid_array_sort(array);
  33         return sha1_pos(oid->hash, array->oid, array->nr, sha1_access);
  34 }
  35
  36 void oid_array_clear(struct oid_array *array)
  37 {
  38         free(array->oid);
  39         array->oid = NULL;
  40         array->nr = 0;
  41         array->alloc = 0;
  42         array->sorted = 0;
  43 }
  44
  45 int oid_array_for_each_unique(struct oid_array *array,
  46                                 for_each_oid_fn fn,
  47                                 void *data)
  48 {
  49         int i;
  50
  51         if (!array->sorted)
  52                 oid_array_sort(array);
  53
  54         for (i = 0; i < array->nr; i++) {
  55                 int ret;
  56                 if (i > 0 && !oidcmp(array->oid + i, array->oid + i - 1))
  57                         continue;
  58                 ret = fn(array->oid + i, data);
  59                 if (ret)
  60                         return ret;
  61         }
  62         return 0;
  63 }