Andrew's git - gitweb.git/blob

   1#include "cache.h"
   2#include "sha1-array.h"
   3#include "sha1-lookup.h"
   4
   5void sha1_array_append(struct sha1_array *array, const unsigned char *sha1)
   6{
   7        ALLOC_GROW(array->sha1, array->nr + 1, array->alloc);
   8        hashcpy(array->sha1[array->nr++], sha1);
   9        array->sorted = 0;
  10}
  11
  12static int void_hashcmp(const void *a, const void *b)
  13{
  14        return hashcmp(a, b);
  15}
  16
  17static void sha1_array_sort(struct sha1_array *array)
  18{
  19        qsort(array->sha1, array->nr, sizeof(*array->sha1), void_hashcmp);
  20        array->sorted = 1;
  21}
  22
  23static const unsigned char *sha1_access(size_t index, void *table)
  24{
  25        unsigned char (*array)[20] = table;
  26        return array[index];
  27}
  28
  29int sha1_array_lookup(struct sha1_array *array, const unsigned char *sha1)
  30{
  31        if (!array->sorted)
  32                sha1_array_sort(array);
  33        return sha1_pos(sha1, array->sha1, array->nr, sha1_access);
  34}
  35
  36void sha1_array_clear(struct sha1_array *array)
  37{
  38        free(array->sha1);
  39        array->sha1 = NULL;
  40        array->nr = 0;
  41        array->alloc = 0;
  42        array->sorted = 0;
  43}
  44
  45void sha1_array_for_each_unique(struct sha1_array *array,
  46                                for_each_sha1_fn fn,
  47                                void *data)
  48{
  49        int i;
  50
  51        if (!array->sorted)
  52                sha1_array_sort(array);
  53
  54        for (i = 0; i < array->nr; i++) {
  55                if (i > 0 && !hashcmp(array->sha1[i], array->sha1[i-1]))
  56                        continue;
  57                fn(array->sha1[i], data);
  58        }
  59}