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/* eurephia_nullsafe.h
*
* standard C string functions, which is made NULL safe by checking
* if input value is NULL before performing the action.
*
* GPLv2 only - Copyright (C) 2008 - 2012
* David Sommerseth <dazo@users.sourceforge.net>
*
* This program 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; version 2
* of the License.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
/**
* @file eurephia_nullsafe.h
* @author David Sommerseth <dazo@users.sourceforge.net>
* @date 2008-08-06
*
* @brief standard C string functions, which is made NULL safe by checking
* if input value is NULL before performing the action.
*
*/
#include <eurephia_context.h>
#ifndef EUREPHIA_NULLSAFE_H_
#define EUREPHIA_NULLSAFE_H_
/**
* atoi() wrapper. Converts any string into a integer
*
* @param str Input string
*
* @return Returns integer
*/
#define atoi_nullsafe(str) (str != NULL ? atoi(str) : 0)
/**
* strdup() wrapper. Duplicates the input string.
*
* @param str Input string to be duplicated
*
* @return Returns a pointer to the duplicate (char *) on success, NULL otherwise.
* If input was NULL, NULL is returned.
*/
#define strdup_nullsafe(str) (str != NULL ? strdup(str) : NULL)
/**
* Wrapper macro, which appends a string to a destination string without exceeding the size
* of the destination buffer.
*
* @param dest Pointer to the destination buffer
* @param src Pointer to the value being concatenated to the destination string.
* @param size Size of the destination buffer
*/
#define append_str(dest, src, size) strncat(dest, src, (size - strlen_nullsafe(dest)))
/**
* strlen() wrapper. Returns the length of a string
*
* @param str Input string
*
* @return Returns int with length of string. If input is NULL, it returns 0.
*/
#define strlen_nullsafe(str) (str != NULL ? strlen(str) : 0)
void *_malloc_nullsafe(eurephiaCTX *, size_t, const char *, int);
/**
* Front-end macro for the _malloc_nullsafe() function.
*
* @param ctx eurephiaCTX (used for debugg logging)
* @param sz Size of the memory region wanted
*
* @return Returns a pointer to the memory region on success, otherwise NULL.
*
*/
#define malloc_nullsafe(ctx, sz) _malloc_nullsafe(ctx, sz, __FILE__, __LINE__)
void inline _free_nullsafe(eurephiaCTX *ctx, void *ptr, const char *file, int line);
/**
* Front-end macro for the __ree_nullsafe() function.
*
* @param ctx eurephiaCTX (used for debugg logging)
* @param ptr Pointer to the memory region being freed.
*
*/
#define free_nullsafe(ctx, ptr) { _free_nullsafe(ctx, ptr, __FILE__, __LINE__); ptr = NULL; }
/**
* Function which will return a default string value if no input data was provided.
*
* @param str Input string
* @param defstr Default string
*
* @return Returns the pointer to the input string if the string length > 0. Otherwise it
* will return a pointer to the default string.
*/
#define defaultValue(str, defstr) (strlen_nullsafe(str) == 0 ? defstr : str)
/**
* Function which will return a default integer value if no input data was provided.
*
* @param ival input integer value
* @param defval default integer value
*
* @return Returns the ival value if it is > 0, otherwise defval value is returned.
*/
#define defaultIntValue(ival, defval) (ival == 0 ? defval : ival)
#endif /* !EUREPHIA_NULLSAFE_H_ */
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