/* * strmap version 1.0.0 * * ANSI C hash table for strings. * * strmap.h * * Copyright (c) 2009 Per Ola Kristensson. * * Per Ola Kristensson <pok21@cam.ac.uk> * Inference Group, Department of Physics * University of Cambridge * Cavendish Laboratory * JJ Thomson Avenue * CB3 0HE Cambridge * United Kingdom * * strmap is free software: you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * strmap is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with strmap. If not, see <http://www.gnu.org/licenses/>. */ #ifndef _STRMAP_H_ #define _STRMAP_H_ #ifdef __cplusplus extern "C" { #endif #include <stdlib.h> #include <string.h> typedef struct StrMap StrMap; /* * This callback function is called once per key-value when enumerating * all keys associated to values. * * Parameters: * * key: A pointer to a null-terminated C string. The string must not * be modified by the client. * * value: A pointer to a null-terminated C string. The string must * not be modified by the client. * * obj: A pointer to a client-specific object. This parameter may be * null. * * Return value: None. */ typedef void(*strmap_enum_func)(const char *key, const char *value, const void *obj); /* * Creates a string map. * * Parameters: * * capacity: The number of top-level slots this string map * should allocate. This parameter must be > 0. * * Return value: A pointer to a string map object, * or null if a new string map could not be allocated. */ StrMap * strmap_new(unsigned int capacity); /* * Releases all memory held by a string map object. * * Parameters: * * map: A pointer to a string map. This parameter cannot be null. * If the supplied string map has been previously released, the * behaviour of this function is undefined. * * Return value: None. */ void strmap_delete(StrMap *map); /* * Returns the value associated with the supplied key. * * Parameters: * * map: A pointer to a string map. This parameter cannot be null. * * key: A pointer to a null-terminated C string. This parameter cannot * be null. * * out_buf: A pointer to an output buffer which will contain the value, * if it exists and fits into the buffer. * * n_out_buf: The size of the output buffer in bytes. * * Return value: If out_buf is set to null and n_out_buf is set to 0 the return * value will be the number of bytes required to store the value (if it exists) * and its null-terminator. For all other parameter configurations the return value * is 1 if an associated value was found and completely copied into the output buffer, * 0 otherwise. */ int strmap_get(const StrMap *map, const char *key, char *out_buf, unsigned int n_out_buf); /* * Queries the existence of a key. * * Parameters: * * map: A pointer to a string map. This parameter cannot be null. * * key: A pointer to a null-terminated C string. This parameter cannot * be null. * * Return value: 1 if the key exists, 0 otherwise. */ int strmap_exists(const StrMap *map, const char *key); /* * Associates a value with the supplied key. If the key is already * associated with a value, the previous value is replaced. * * Parameters: * * map: A pointer to a string map. This parameter cannot be null. * * key: A pointer to a null-terminated C string. This parameter * cannot be null. The string must have a string length > 0. The * string will be copied. * * value: A pointer to a null-terminated C string. This parameter * cannot be null. The string must have a string length > 0. The * string will be copied. * * Return value: 1 if the association succeeded, 0 otherwise. */ int strmap_put(StrMap *map, const char *key, const char *value); /* * Returns the number of associations between keys and values. * * Parameters: * * map: A pointer to a string map. This parameter cannot be null. * * Return value: The number of associations between keys and values. */ int strmap_get_count(const StrMap *map); /* * Enumerates all associations between keys and values. * * Parameters: * * map: A pointer to a string map. This parameter cannot be null. * * enum_func: A pointer to a callback function that will be * called by this procedure once for every key associated * with a value. This parameter cannot be null. * * obj: A pointer to a client-specific object. This parameter will be * passed back to the client's callback function. This parameter can * be null. * * Return value: 1 if enumeration completed, 0 otherwise. */ int strmap_enum(const StrMap *map, strmap_enum_func enum_func, const void *obj); #ifdef __cplusplus } #endif #endif /* GNU LESSER GENERAL PUBLIC LICENSE Version 3, 29 June 2007 Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/> Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. This version of the GNU Lesser General Public License incorporates the terms and conditions of version 3 of the GNU General Public License, supplemented by the additional permissions listed below. 0. Additional Definitions. 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