Andrew's git - gitweb.git/blob

   1#include "cache.h"
   2#include "sha1-array.h"
   3#include "sha1-lookup.h"
   4
   5void 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
  12static int void_hashcmp(const void *a, const void *b)
  13{
  14        return oidcmp(a, b);
  15}
  16
  17static void oid_array_sort(struct oid_array *array)
  18{
  19        QSORT(array->oid, array->nr, void_hashcmp);
  20        array->sorted = 1;
  21}
  22
  23static const unsigned char *sha1_access(size_t index, void *table)
  24{
  25        struct object_id *array = table;
  26        return array[index].hash;
  27}
  28
  29int 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
  36void 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
  45int 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}