diff options
Diffstat (limited to 'pfxtree.h')
| -rw-r--r-- | pfxtree.h | 40 |
1 files changed, 33 insertions, 7 deletions
@@ -1,6 +1,6 @@ /* * libpfxtree - Delwink prefix tree library - * Copyright (C) 2015, 2017 Delwink, LLC + * Copyright (C) 2015, 2017, 2020 Delwink, LLC * * Redistributions, modified or unmodified, in whole or in part, must retain * applicable copyright or other legal privilege notices, these conditions, and @@ -38,8 +38,8 @@ /** * @file pfxtree.h - * @version 0.3 - * @date 5/12/2017 + * @version 0.4 + * @date 2/25/2020 * @author David McMackins II * @brief Delwink prefix tree (trie) library */ @@ -59,6 +59,12 @@ __BEGIN_DECLS +enum pt_data_type +{ + PT_TYPE_INT, + PT_TYPE_PTR +}; + /** * @brief Error codes possibly returned by functions in this library. */ @@ -68,7 +74,7 @@ enum pt_error PT_ENOWORD = -2 }; -union _pt_data +union pt_data { int i; void *p; @@ -79,13 +85,14 @@ union _pt_data */ typedef struct _pt_trie { - int ch; - int type; - union _pt_data data; + union pt_data data; struct _pt_trie *parent; struct _pt_trie *children; struct _pt_trie *next; + + int ch; + enum pt_data_type type; } PrefixTree; /** @@ -173,6 +180,25 @@ pt_data_type(const PrefixTree *self); const PrefixTree * pt_search(const PrefixTree *root, const char *word); +struct pt_entry +{ + const char *word; + union pt_data data; + enum pt_data_type type; +}; + +/** + * @brief Run an operation for each word in a prefix tree. + * @param root The node from which to begin the search. + * @param f The operation to be run, accepting the word, its data, and + * and arbitrary data; returns nonzero to break the loop. + * @param data Data to be passed to f. + * @return Nonzero on error, or nonzero return from f. + */ +int +pt_foreach(const PrefixTree *root, int (*f)(const struct pt_entry *,void *), + void *data); + /** * @brief Checks the current version of the library. * @return A version string for this libpfxtree installation. |