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76 lines
1.6 KiB
C
76 lines
1.6 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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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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if (map->len>=map->reallen) {
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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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elog(ERROR, "No 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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elog(ERROR, "No memory");
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map->list[ map->len ].value=value;
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map->len++;
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if ( map->len>1 ) 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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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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SNMapEntry *ptr;
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SNMapEntry ks = {key, 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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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 freeSNMap( SNMap *map ) {
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SNMapEntry *entry=map->list;
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if ( map->list ) {
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while( map->len ) {
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if ( entry->key ) free(entry->key);
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entry++; 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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