Andrew's git / gitweb.git / sha1-array.c
?
sha1-array.con commit conditional markdown preprocessing (c8b1cd9)
   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_AND_NULL(array->oid);
  39        array->nr = 0;
  40        array->alloc = 0;
  41        array->sorted = 0;
  42}
  43
  44
  45int oid_array_for_each(struct oid_array *array,
  46                       for_each_oid_fn fn,
  47                       void *data)
  48{
  49        int i;
  50
  51        /* No oid_array_sort() here! See the api-oid-array.txt docs! */
  52
  53        for (i = 0; i < array->nr; i++) {
  54                int ret = fn(array->oid + i, data);
  55                if (ret)
  56                        return ret;
  57        }
  58        return 0;
  59}
  60
  61int oid_array_for_each_unique(struct oid_array *array,
  62                              for_each_oid_fn fn,
  63                              void *data)
  64{
  65        int i;
  66
  67        if (!array->sorted)
  68                oid_array_sort(array);
  69
  70        for (i = 0; i < array->nr; i++) {
  71                int ret;
  72                if (i > 0 && oideq(array->oid + i, array->oid + i - 1))
  73                        continue;
  74                ret = fn(array->oid + i, data);
  75                if (ret)
  76                        return ret;
  77        }
  78        return 0;
  79}
  80
  81void oid_array_filter(struct oid_array *array,
  82                      for_each_oid_fn want,
  83                      void *cb_data)
  84{
  85        unsigned nr = array->nr, src, dst;
  86        struct object_id *oids = array->oid;
  87
  88        for (src = dst = 0; src < nr; src++) {
  89                if (want(&oids[src], cb_data)) {
  90                        if (src != dst)
  91                                oidcpy(&oids[dst], &oids[src]);
  92                        dst++;
  93                }
  94        }
  95        array->nr = dst;
  96}