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/**********************************************************************
*
* PostGIS - Spatial Types for PostgreSQL
* http://postgis.net
*
* PostGIS is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* PostGIS 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with PostGIS. If not, see <http://www.gnu.org/licenses/>.
*
**********************************************************************
*
* Copyright 2021 Paul Ramsey <pramsey@cleverelephant.ca>
*
**********************************************************************/
#ifndef _OPTIONLIST_H
#define _OPTIONLIST_H 1
#include "liblwgeom_internal.h"
#define OPTION_LIST_SIZE 128
/**
* option_list is a null-terminated list of strings, where every odd
* string is a key and every even string is a value. To avoid lots of
* memory allocations, we use the input string as the backing store
* and fill in the olist with pointers to the start of the key and
* value strings, with keys in the even slots and values in the
* odd slots. The input needs to be writeable because we write a
* '\0' into the string at the break between token separators.
*
* // array of char*
* char *olist[OPTION_LIST_SIZE];
* // zero out all the pointers so our list ends up null-terminated
* memset(olist, 0, sizeof(olist));
* char input[OPTION_LIST_SIZE];
* strcpy(input, "key1=value1 key2=value2"); // writeable
* option_list_parse(input, olist);
* char* key = "key2";
* const char* value = option_list_search(olist, key);
* printf("value of '%s' is '%s'\n", key, value);
*
*/
extern void option_list_parse(char* input, char **olist);
/**
* Returns null if the key cannot be found. Only
* use fully lowercase keys, because we lowercase
* keys when we parse the olist
*/
extern const char* option_list_search(char** olist, const char* key);
/**
* Returns the total number of keys and values in the list
*/
extern size_t option_list_length(char **olist);
extern void option_list_gdal_parse(char* input, char** olist);
#endif
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