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106 lines
2.0 KiB
C
106 lines
2.0 KiB
C
/*
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* simple but fast map from str to Oid
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* Teodor Sigaev <teodor@sigaev.ru>
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*/
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#include <errno.h>
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#include <stdlib.h>
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#include <string.h>
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#include "postgres.h"
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#include "snmap.h"
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#include "common.h"
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static int
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compareSNMapEntry(const void *a, const void *b)
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{
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if ( ((SNMapEntry *) a)->nsp < ((SNMapEntry *) b)->nsp )
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return -1;
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else if ( ((SNMapEntry *) a)->nsp > ((SNMapEntry *) b)->nsp )
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return 1;
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else
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return strcmp(((SNMapEntry *) a)->key, ((SNMapEntry *) b)->key);
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}
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void
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addSNMap(SNMap * map, char *key, Oid value)
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{
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if (map->len >= map->reallen)
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{
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SNMapEntry *tmp;
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int len = (map->reallen) ? 2 * map->reallen : 16;
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tmp = (SNMapEntry *) realloc(map->list, sizeof(SNMapEntry) * len);
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if (!tmp)
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ereport(ERROR,
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(errcode(ERRCODE_OUT_OF_MEMORY),
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errmsg("out of memory")));
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map->reallen = len;
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map->list = tmp;
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}
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map->list[map->len].key = strdup(key);
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if (!map->list[map->len].key)
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ereport(ERROR,
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(errcode(ERRCODE_OUT_OF_MEMORY),
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errmsg("out of memory")));
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map->list[map->len].nsp = get_oidnamespace(TSNSP_FunctionOid);
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map->list[map->len].value = value;
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map->len++;
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if (map->len > 1)
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qsort(map->list, map->len, sizeof(SNMapEntry), compareSNMapEntry);
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}
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void
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addSNMap_t(SNMap * map, text *key, Oid value)
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{
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char *k = text2char(key);
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addSNMap(map, k, value);
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pfree(k);
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}
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Oid
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findSNMap(SNMap * map, char *key)
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{
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SNMapEntry *ptr;
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SNMapEntry ks;
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ks.key = key;
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ks.nsp = get_oidnamespace(TSNSP_FunctionOid);
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ks.value = 0;
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if (map->len == 0 || !map->list)
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return 0;
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ptr = (SNMapEntry *) bsearch(&ks, map->list, map->len, sizeof(SNMapEntry), compareSNMapEntry);
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return (ptr) ? ptr->value : 0;
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}
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Oid
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findSNMap_t(SNMap * map, text *key)
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{
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char *k = text2char(key);
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int res;
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res = findSNMap(map, k);
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pfree(k);
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return res;
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}
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void
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freeSNMap(SNMap * map)
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{
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SNMapEntry *entry = map->list;
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if (map->list)
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{
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while (map->len)
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{
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if (entry->key)
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free(entry->key);
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entry++;
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map->len--;
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}
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free(map->list);
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}
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memset(map, 0, sizeof(SNMap));
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}
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