/*
 * This example source code introduces a c library buffered I/O
 * interface to URL reads it supports fopen(), fread(), fgets(), feof(),
 * fclose(), rewind(). Supported functions have identical prototypes to
 * their normal c lib namesakes and are preceaded by url_ .
 *
 * Using this code you can replace your program's fopen() with
 * url_fopen() and fread() with url_fread() and it become possible to
 * read remote streams instead of (only) local files. Local files (ie
 * those that can be directly fopened) will drop back to using the
 * underlying clib implementations
 *
 * See the main() function at the bottom that shows an app that retrives
 * from a specified url using fgets() and fread() and saves as two
 * output files.
 *
 * Copyright (c) 2003 Simtec Electronics
 *
 * Re-implemented by Vincent Sanders <vince@kyllikki.org> with extensive
 * reference to original curl example code
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 * the documentation and/or other materials provided with the
 * distribution.
 * 3. The name of the author may not be used to endorse or promote
 * products derived from this software without specific prior written
 * permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * This example requires libcurl 7.9.7 or later.
 */

#ifndef URL_FILE_H
#define URL_FILE_H

#include <stdio.h>
#include <string.h>
#ifndef WIN32
#	include <sys/time.h>
#endif
#include <curl/curl.h>
#include <errno.h>
#include <stdlib.h>

enum fcurl_type_e { CFTYPE_NONE = 0, CFTYPE_FILE = 1, CFTYPE_CURL = 2 };

struct fcurl_data {
	enum fcurl_type_e type; /* type of handle */
	union {
		CURL *curl;
		FILE *file;
	} handle; /* handle */

	char *buffer;	  /* buffer to store cached data*/
	size_t buffer_len; /* currently allocated buffers length */
	size_t buffer_pos; /* end of data in buffer*/
	int still_running; /* Is background url fetch still in progress */
};

typedef struct fcurl_data URL_FILE;

/* exported functions */
URL_FILE *url_fopen (const char *url, const char *operation);
int url_fclose (URL_FILE *file);
int url_feof (URL_FILE *file);
size_t url_fread (void *ptr, size_t size, size_t nmemb, URL_FILE *file);
char *url_fgets (char *ptr, size_t size, URL_FILE *file);
void url_rewind (URL_FILE *file);

#endif