quickjs-tart

ares_htable_strvp.c (5001B)

---

 /* MIT License
  *
  * Copyright (c) 2023 Brad House
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
  * in the Software without restriction, including without limitation the rights
  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  * copies of the Software, and to permit persons to whom the Software is
  * furnished to do so, subject to the following conditions:
  *
  * The above copyright notice and this permission notice (including the next
  * paragraph) shall be included in all copies or substantial portions of the
  * Software.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  * SOFTWARE.
  *
  * SPDX-License-Identifier: MIT
  */
 #include "ares_private.h"
 #include "ares_htable.h"
 #include "ares_htable_strvp.h"
 
 struct ares_htable_strvp {
   ares_htable_strvp_val_free_t free_val;
   ares_htable_t               *hash;
 };
 
 typedef struct {
   char                *key;
   void                *val;
   ares_htable_strvp_t *parent;
 } ares_htable_strvp_bucket_t;
 
 void ares_htable_strvp_destroy(ares_htable_strvp_t *htable)
 {
   if (htable == NULL) {
     return;
   }
 
   ares_htable_destroy(htable->hash);
   ares_free(htable);
 }
 
 static unsigned int hash_func(const void *key, unsigned int seed)
 {
   const char *arg = key;
   return ares_htable_hash_FNV1a_casecmp((const unsigned char *)arg,
                                         ares_strlen(arg), seed);
 }
 
 static const void *bucket_key(const void *bucket)
 {
   const ares_htable_strvp_bucket_t *arg = bucket;
   return arg->key;
 }
 
 static void bucket_free(void *bucket)
 {
   ares_htable_strvp_bucket_t *arg = bucket;
 
   if (arg->parent->free_val) {
     arg->parent->free_val(arg->val);
   }
   ares_free(arg->key);
   ares_free(arg);
 }
 
 static ares_bool_t key_eq(const void *key1, const void *key2)
 {
   return ares_strcaseeq(key1, key2);
 }
 
 ares_htable_strvp_t *
   ares_htable_strvp_create(ares_htable_strvp_val_free_t val_free)
 {
   ares_htable_strvp_t *htable = ares_malloc(sizeof(*htable));
   if (htable == NULL) {
     goto fail;
   }
 
   htable->hash = ares_htable_create(hash_func, bucket_key, bucket_free, key_eq);
   if (htable->hash == NULL) {
     goto fail;
   }
 
   htable->free_val = val_free;
 
   return htable;
 
 fail:
   if (htable) {
     ares_htable_destroy(htable->hash);
     ares_free(htable);
   }
   return NULL;
 }
 
 ares_bool_t ares_htable_strvp_insert(ares_htable_strvp_t *htable,
                                      const char *key, void *val)
 {
   ares_htable_strvp_bucket_t *bucket = NULL;
 
   if (htable == NULL || key == NULL) {
     goto fail;
   }
 
   bucket = ares_malloc(sizeof(*bucket));
   if (bucket == NULL) {
     goto fail;
   }
 
   bucket->parent = htable;
   bucket->key    = ares_strdup(key);
   if (bucket->key == NULL) {
     goto fail;
   }
   bucket->val = val;
 
   if (!ares_htable_insert(htable->hash, bucket)) {
     goto fail;
   }
 
   return ARES_TRUE;
 
 fail:
   if (bucket) {
     ares_free(bucket->key);
     ares_free(bucket);
   }
   return ARES_FALSE;
 }
 
 ares_bool_t ares_htable_strvp_get(const ares_htable_strvp_t *htable,
                                   const char *key, void **val)
 {
   ares_htable_strvp_bucket_t *bucket = NULL;
 
   if (val) {
     *val = NULL;
   }
 
   if (htable == NULL || key == NULL) {
     return ARES_FALSE;
   }
 
   bucket = ares_htable_get(htable->hash, key);
   if (bucket == NULL) {
     return ARES_FALSE;
   }
 
   if (val) {
     *val = bucket->val;
   }
   return ARES_TRUE;
 }
 
 void *ares_htable_strvp_get_direct(const ares_htable_strvp_t *htable,
                                    const char                *key)
 {
   void *val = NULL;
   ares_htable_strvp_get(htable, key, &val);
   return val;
 }
 
 ares_bool_t ares_htable_strvp_remove(ares_htable_strvp_t *htable,
                                      const char          *key)
 {
   if (htable == NULL) {
     return ARES_FALSE;
   }
 
   return ares_htable_remove(htable->hash, key);
 }
 
 void *ares_htable_strvp_claim(ares_htable_strvp_t *htable, const char *key)
 {
   ares_htable_strvp_bucket_t *bucket = NULL;
   void                       *val;
 
   if (htable == NULL || key == NULL) {
     return NULL;
   }
 
   bucket = ares_htable_get(htable->hash, key);
   if (bucket == NULL) {
     return NULL;
   }
 
   /* Unassociate value from bucket */
   val         = bucket->val;
   bucket->val = NULL;
 
   ares_htable_strvp_remove(htable, key);
   return val;
 }
 
 size_t ares_htable_strvp_num_keys(const ares_htable_strvp_t *htable)
 {
   if (htable == NULL) {
     return 0;
   }
   return ares_htable_num_keys(htable->hash);
 }