actube/src/cw/cw_filename.c

/*
    This file is part of actube.

    actube 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 3 of the License, or
    (at your option) any later version.

    actube 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 actube.  If not, see <http://www.gnu.org/licenses/>.
*/
/**
 * @file 
 * @brief implents cw_filename
 **/

#include <string.h>
#include <stdio.h>
#include "file.h"

/**
 * @brief Build full pathname from path, filename and extension
 * @param path Path
 * @param name Filename
 * @param ext Extension
 * @return a pointer to the create filename which has to be 
 * released using free.
 */
char *cw_filename(const char *path, const char *name, const char *ext)
{
	int name_len;
	int ext_len;
	int size = 0;

	int path_len;
	char c;
	char *result;
	char *slash = "";

	path_len = strlen(path);
	if (path_len > 0) {
		c = path[path_len - 1];
		if (!strchr(CW_FILE_PATH_DELIMITERS, c)) {
			path_len++;
			slash = "/";
		}
	}

	name_len = strlen(name);

	if (ext != NULL) {
		if (ext[0] == '.') {
			ext++;
		}
		ext_len = strlen(ext);
	} else
		ext_len = -1;

	size = (path_len) + name_len + (ext_len + 1) + 1;
	result = malloc(size);
	if (!result)
		return NULL;

	strncpy(result, path, path_len);
	result[path_len] = 0;
	strcat(result, slash);
	strcat(result, name);
	if (ext) {
		strcat(result, ".");
		strcat(result, ext);
	}

	return result;
}