73 lines
1.7 KiB
C
73 lines
1.7 KiB
C
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#ifndef AD3_TERNARYTRIE
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#define AD3_TERNARYTRIE
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/**
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* The implementation of a Ternary Trie.
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*
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* Each node should be represented by a binary tree in order to reduce the memory usage.
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*/
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#include <stdbool.h>
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#include <stddef.h>
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/**
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* Type definition for the struct representing the current Trie.
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*
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* You can (and should) redefine this in your c-file with the concrete fields.
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*/
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typedef struct ttrie TernaryTrie;
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/**
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* Allocate and initialize an empty Trie.
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*
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* @return a pointer to an empty Trie struct
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*/
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TernaryTrie* ternarytrie_init();
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/**
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* De-allocate a trie by freeing the memory occupied by this trie.
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*
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* @param trie which should be freed
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*/
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void ternarytrie_free(TernaryTrie* trie);
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/**
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* Search whether a string is contained in this trie.
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*
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* @param trie
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* @param string
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* @return true if the string is contained within this trie, false otherwise
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*/
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bool ternarytrie_search(TernaryTrie* trie, const char* string);
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/**
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* Add a string to this trie.
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*
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* @param trie
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* @param string
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* @return true if the trie was changed by this operation, false if it was already present
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*/
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bool ternarytrie_add(TernaryTrie* trie, const char* string);
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/**
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* Remove a string from this trie.
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*
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* Note: strings added to this trie are considered to be "owned" by the caller.
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* Removing the string from the trie should not free the string's memory.
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*
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* @param trie
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* @param string
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* @return true if the string was present and has been removed, false if it was not present
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*/
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bool ternarytrie_remove(TernaryTrie* trie, const char* string);
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/**
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* Returns the number of strings in this trie.
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*
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* @param trie
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* @return the number of strings in this trie
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*/
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size_t ternarytrie_size(TernaryTrie* trie);
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#endif //AD3_TERNARYTRIE
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