project_files/frontlib/util/inihelper.c
author Medo <smaxein@googlemail.com>
Tue, 12 Jun 2012 21:10:11 +0200
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frontlib: Rewrote the ini helper code, finished ini reading/writing support for all relevant file types
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#include "inihelper.h"
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#include "../iniparser/dictionary.h"
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#include "../iniparser/iniparser.h"
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#include "logging.h"
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#include "util.h"
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#include <string.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include <limits.h>
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#include <errno.h>
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#include <stdarg.h>
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struct _flib_ini {
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	dictionary *inidict;
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	char *currentSection;
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};
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static char *createDictKey(const char *sectionName, const char *keyName) {
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	return flib_asprintf("%s:%s", sectionName, keyName);
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}
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/**
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 * Turns a string into a lowercase string, in-place.
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 */
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static void strToLower(char *str) {
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	if(str) {
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		while(*str) {
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			*str = tolower(*str);
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			str++;
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		}
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	}
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}
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flib_ini *flib_ini_create(const char *filename) {
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	flib_ini *result = NULL;
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	flib_ini *tmpIni = flib_calloc(1, sizeof(flib_ini));
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	if(tmpIni) {
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		if(filename) {
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			tmpIni->inidict = iniparser_load(filename);
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		}
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		if(!tmpIni->inidict) {
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			tmpIni->inidict = dictionary_new(0);
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		}
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		if(tmpIni->inidict) {
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			result = tmpIni;
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			tmpIni = NULL;
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		}
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	}
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	flib_ini_destroy(tmpIni);
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	return result;
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}
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flib_ini *flib_ini_load(const char *filename) {
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	flib_ini *result = NULL;
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	if(!filename) {
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		flib_log_e("null parameter in flib_ini_load");
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	} else {
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		flib_ini *tmpIni = flib_calloc(1, sizeof(flib_ini));
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		if(tmpIni) {
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			tmpIni->inidict = iniparser_load(filename);
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			if(tmpIni->inidict) {
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				result = tmpIni;
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				tmpIni = NULL;
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			}
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		}
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		flib_ini_destroy(tmpIni);
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	}
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	return result;
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}
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int flib_ini_save(flib_ini *ini, const char *filename) {
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	int result = INI_ERROR_OTHER;
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	if(!ini || !filename) {
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		flib_log_e("null parameter in flib_ini_save");
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	} else {
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		FILE *file = fopen(filename, "wb");
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		if(!file) {
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			flib_log_e("Error opening file \"%s\" for writing.", filename);
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		} else {
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			iniparser_dump_ini(ini->inidict, file);
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			if(fclose(file)) {
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				flib_log_e("Write error on ini file \"%s\"", filename);
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			} else {
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				result = 0;
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			}
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		}
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	}
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	return result;
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}
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void flib_ini_destroy(flib_ini *ini) {
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	if(ini) {
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		if(ini->inidict) {
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			iniparser_freedict(ini->inidict);
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		}
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		free(ini->currentSection);
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		free(ini);
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	}
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}
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int flib_ini_enter_section(flib_ini *ini, const char *section) {
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	int result = INI_ERROR_OTHER;
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	if(ini) {
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		free(ini->currentSection);
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		ini->currentSection = NULL;
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	}
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	if(!ini || !section) {
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		flib_log_e("null parameter in flib_ini_enter_section");
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	} else {
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		if(!iniparser_find_entry(ini->inidict, section)) {
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			result = INI_ERROR_NOTFOUND;
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		} else {
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			ini->currentSection = flib_strdupnull(section);
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			if(ini->currentSection) {
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				// Usually iniparser ignores case, but some section-handling functions don't,
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				// so we set it to lowercase manually
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				strToLower(ini->currentSection);
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				result = 0;
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			}
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		}
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	}
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	return result;
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}
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int flib_ini_create_section(flib_ini *ini, const char *section) {
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	int result = INI_ERROR_OTHER;
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	if(!ini || !section) {
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		flib_log_e("null parameter in flib_ini_create_section");
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	} else {
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		result = flib_ini_enter_section(ini, section);
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		if(result == INI_ERROR_NOTFOUND) {
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			if(iniparser_set(ini->inidict, section, NULL)) {
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				result = INI_ERROR_OTHER;
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			} else {
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				result = flib_ini_enter_section(ini, section);
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			}
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		}
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	}
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	return result;
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}
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/**
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 * The result is an internal string of the iniparser, don't free it.
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 */
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static char *findValue(dictionary *dict, const char *section, const char *key) {
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	char *result = NULL;
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	char *dictKey = createDictKey(section, key);
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	if(dictKey) {
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		result = iniparser_getstring(dict, dictKey, NULL);
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	}
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	free(dictKey);
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	return result;
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}
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int flib_ini_get_str(flib_ini *ini, char **outVar, const char *key) {
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	char *tmpValue = NULL;
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	int result = flib_ini_get_str_opt(ini, &tmpValue, key, NULL);
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	if(result==0) {
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		if(tmpValue == NULL) {
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			result = INI_ERROR_NOTFOUND;
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		} else {
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			*outVar = tmpValue;
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			tmpValue = NULL;
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		}
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	}
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	free(tmpValue);
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	return result;
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}
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int flib_ini_get_str_opt(flib_ini *ini, char **outVar, const char *key, const char *def) {
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	int result = INI_ERROR_OTHER;
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	if(!ini || !outVar || !key || !ini->currentSection) {
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		flib_log_e("null parameter or no current section in flib_ini_get_str_opt");
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	} else {
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		const char *value = findValue(ini->inidict, ini->currentSection, key);
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		if(!value) {
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			value = def;
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		}
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		char *valueDup = flib_strdupnull(value);
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		if(valueDup) {
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			*outVar = valueDup;
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			result = 0;
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		}
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	}
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	return result;
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}
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int flib_ini_get_int(flib_ini *ini, int *outVar, const char *key) {
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	char *tmpValue = NULL;
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	int result = flib_ini_get_str(ini, &tmpValue, key);
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	if(result==0) {
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		errno = 0;
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		long val = strtol(tmpValue, NULL, 10);
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		if(errno!=0 || val<INT_MIN || val>INT_MAX) {
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			flib_log_w("Cannot parse ini setting %s/%s = \"%s\" as integer.", ini->currentSection, key, tmpValue);
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			result = INI_ERROR_FORMAT;
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		} else {
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			*outVar = val;
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		}
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   202
	}
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	free(tmpValue);
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	return result;
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   205
}
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   206
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int flib_ini_get_int_opt(flib_ini *ini, int *outVar, const char *key, int def) {
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	int tmpValue;
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	int result = flib_ini_get_int(ini, &tmpValue, key);
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	if(result == 0) {
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		*outVar = tmpValue;
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	} else if(result == INI_ERROR_NOTFOUND) {
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		*outVar = def;
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		result = 0;
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	}
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	return result;
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}
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int flib_ini_get_bool(flib_ini *ini, bool *outVar, const char *key) {
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	char *tmpValue = NULL;
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	int result = flib_ini_get_str(ini, &tmpValue, key);
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	if(result==0) {
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		bool trueval = strchr("1tTyY", tmpValue[0]);
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		bool falseval = strchr("0fFnN", tmpValue[0]);
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		if(!trueval && !falseval) {
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			flib_log_w("ini setting %s/%s = \"%s\" is not a recognized truth value.", ini->currentSection, key, tmpValue);
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			result = INI_ERROR_FORMAT;
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   228
		} else {
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			*outVar = trueval;
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   230
		}
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   231
	}
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   232
	free(tmpValue);
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	return result;
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}
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int flib_ini_get_bool_opt(flib_ini *ini, bool *outVar, const char *key, bool def) {
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	bool tmpValue;
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	int result = flib_ini_get_bool(ini, &tmpValue, key);
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	if(result == 0) {
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		*outVar = tmpValue;
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	} else if(result == INI_ERROR_NOTFOUND) {
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		*outVar = def;
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		result = 0;
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	}
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	return result;
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}
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int flib_ini_set_str(flib_ini *ini, const char *key, const char *value) {
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	int result = INI_ERROR_OTHER;
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	if(!ini || !key || !value || !ini->currentSection) {
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		flib_log_e("null parameter or no current section in flib_ini_set_str");
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	} else {
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		char *dictKey = createDictKey(ini->currentSection, key);
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		if(dictKey) {
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			result = iniparser_set(ini->inidict, dictKey, value);
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		}
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		free(dictKey);
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	}
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	return result;
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}
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int flib_ini_set_int(flib_ini *ini, const char *key, int value) {
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	int result = INI_ERROR_OTHER;
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	char *strvalue = flib_asprintf("%i", value);
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	if(strvalue) {
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		result = flib_ini_set_str(ini, key, strvalue);
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	}
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	free(strvalue);
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	return result;
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}
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int flib_ini_set_bool(flib_ini *ini, const char *key, bool value) {
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	return flib_ini_set_str(ini, key, value ? "true" : "false");
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}
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int flib_ini_get_sectioncount(flib_ini *ini) {
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	int result = INI_ERROR_OTHER;
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	if(!ini) {
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		flib_log_e("null parameter in flib_ini_get_sectioncount");
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	} else {
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		result = iniparser_getnsec(ini->inidict);
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	}
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	return result;
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}
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char *flib_ini_get_sectionname(flib_ini *ini, int number) {
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	char *result = NULL;
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	if(!ini || number<0) {
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		flib_log_e("bad parameter in flib_ini_get_sectionname");
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	} else {
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		result = flib_strdupnull(iniparser_getsecname(ini->inidict, number));
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	}
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	return result;
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   294
}
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int flib_ini_get_keycount(flib_ini *ini) {
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	int result = INI_ERROR_OTHER;
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	if(!ini || !ini->currentSection) {
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		flib_log_e("null parameter or no current section in flib_ini_get_keycount");
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	} else {
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		result = iniparser_getsecnkeys(ini->inidict, ini->currentSection);
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	}
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	return result;
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}
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char *flib_ini_get_keyname(flib_ini *ini, int number) {
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	char *result = NULL;
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	if(!ini || number<0 || !ini->currentSection) {
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		flib_log_e("bad parameter or no current section in flib_ini_get_keyname");
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	} else {
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		int keyCount = iniparser_getsecnkeys(ini->inidict, ini->currentSection);
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		char **keys = iniparser_getseckeys(ini->inidict, ini->currentSection);
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		if(keys && keyCount>number) {
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			// The keys are in the format section:key, so we have to skip the section and colon.
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			result = flib_strdupnull(keys[number]+strlen(ini->currentSection)+1);
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		}
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		free(keys);
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   318
	}
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	return result;
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}