/*

 * Hedgewars, a free turn based strategy game

 * Copyright (C) 2012 Simeon Maxein <smaxein@googlemail.com>

 *

 * 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; either version 2

 * of the License, or (at your option) any later version.

 *

 * 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.

 */

#ifndef FLIB_UTIL_H_

#define FLIB_UTIL_H_

#include <stddef.h>

#include <stdarg.h>

#include <stdbool.h>

/**

 * Prints a format string to a newly allocated buffer of the required size.

 * Parameters are like those for printf. Returns NULL on error.

 *

 * Returned buffer must be free()d

 */

char *flib_asprintf(const char *fmt, ...);

/**

 * Exactly as flib_asprintf, but accepts a va_list.

 */

char *flib_vasprintf(const char *fmt, va_list args);

/**

 * Creates a new string (that must be freed) containing all parts

 * joined together, with the specified delimiter between each.

 */

char *flib_join(char **parts, int partCount, const char *delimiter);

/**

 * Return a duplicate of the provided string, or NULL if an error

 * occurs or if str is already NULL.

 *

 * Returned buffer must be free()d

 */

char *flib_strdupnull(const char *str);

/**

 * Return a duplicate of the provided buffer, or NULL if an error

 * occurs or if buf is already NULL or if size is 0.

 *

 * Returned buffer must be free()d

 */

void *flib_bufdupnull(const void *buf, size_t size);

/**

 * Simple malloc wrapper that automatically logs an error if no memory

 * is available. Otherwise behaves exactly like malloc.

 */

void *flib_malloc(size_t size);

/**

 * Simple calloc wrapper that automatically logs an error if no memory

 * is available. Otherwise behaves exactly like calloc.

 */

void *flib_calloc(size_t count, size_t elementsize);

/**

 * Simple realloc wrapper that automatically logs an error if no memory

 * is available. Otherwise behaves exactly like realloc.

 */

void *flib_realloc(void *ptr, size_t size);

/**

 * Replace all non-alphanumeric and non-ascii bytes with escape

 * sequences in the form %XX. Does not modify the original string,

 * but returns a newly allocated one that must be free()d. Returns

 * null on failure or if null was passed as argument.

 *

 * This should work fine with all ASCII-based charsets including UTF-8.

 */

char *flib_urlencode(const char *str);

/**

 * Replace some bytes with escape sequences in the form %XX.

 * Does not modify the original string, but returns a newly allocated

 * one that must be free()d.

 *

 * All bytes for which the predicate function returns true are escaped.

 *

 * Returns null on failure or if null was passed as argument.

 */

char *flib_urlencode_pred(const char *str, bool (*needsEscaping)(char c));

/**

 * Replace escape sequences of the form %XX with their byte values.

 * Does not modify the original string, but returns a newly allocated

 * one that must be free()d. Returns null on failure or if null was

 * passed as argument.

 */

char *flib_urldecode(const char *str);

/**

 * Figure out if the string contains / or \. Useful in routines that

 * construct filenames.

 */

bool flib_contains_dir_separator(const char *str);

/**

 * Returns true if str is either NULL or points to a 0-length string

 */

bool flib_strempty(const char *str);

int flib_gets(char *str, size_t strlen);

#endif