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a537d80372
mod_prefix is an in-memory data store optimized for fast lookups according to the longest prefix match (LPM) rule. Tables of key-value string pairs in JSON format can be loaded at startup via configuration and at runtime via the API. The implementation uses a bitwise trie (aka binary prefix tree), so arbitrary string keys are supported.
41 lines
1.8 KiB
C
41 lines
1.8 KiB
C
/*
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* Copyright (c) 2014 Travis Cross <tc@traviscross.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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struct bit_trie_node {
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struct bit_trie_node *next[2];
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void *value;
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uint32_t value_len;
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};
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struct bit_trie_node* bit_trie_create();
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uint32_t bit_trie_get(struct bit_trie_node **node_out,
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struct bit_trie_node *node,
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unsigned char *key,
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uint32_t key_len);
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struct bit_trie_node* bit_trie_set(struct bit_trie_node *node,
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unsigned char *key,
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uint32_t key_len,
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void *value,
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uint32_t value_len);
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uint32_t bit_trie_free(struct bit_trie_node *node);
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uint32_t bit_trie_byte_size(struct bit_trie_node *node);
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