/*******************************************************************************
 *
 * Copyright (c) 2000-2003 Intel Corporation
 * All rights reserved.
 * Copyright (c) 2012 France Telecom All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 * - 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.
 * - Neither name of Intel Corporation nor the names of its contributors
 * may be used to endorse or promote products derived from this software
 * without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "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 INTEL OR
 * CONTRIBUTORS 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.
 *
 ******************************************************************************/

/************************************************************************
 * Purpose: This file defines status codes, buffers to store the status	*
 * messages and functions to manipulate those buffers
 **
 ************************************************************************/

#include "statcodes.h"
#include "config.h"
#include "upnputil.h"
#include <stdio.h>
#include <string.h>

#ifdef _WIN32
	#include "unixutil.h"
#endif

#define NUM_1XX_CODES 2
static const char *Http1xxCodes[NUM_1XX_CODES];
static const char *Http1xxStr = "Continue\0"
				"Switching Protocols\0";

#define NUM_2XX_CODES 7
static const char *Http2xxCodes[NUM_2XX_CODES];
static const char *Http2xxStr = "OK\0"
				"Created\0"
				"Accepted\0"
				"Non-Authoratative Information\0"
				"No Content\0"
				"Reset Content\0"
				"Partial Content\0";

#define NUM_3XX_CODES 8
static const char *Http3xxCodes[NUM_3XX_CODES];
static const char *Http3xxStr = "Multiple Choices\0"
				"Moved Permanently\0"
				"Found\0"
				"See Other\0"
				"Not Modified\0"
				"Use Proxy\0"
				"\0"
				"Temporary Redirect\0";

#define NUM_4XX_CODES 18
static const char *Http4xxCodes[NUM_4XX_CODES];
static const char *Http4xxStr = "Bad Request\0"
				"Unauthorized\0"
				"Payment Required\0"
				"Forbidden\0"
				"Not Found\0"
				"Method Not Allowed\0"
				"Not Acceptable\0"
				"Proxy Authentication Required\0"
				"Request Timeout\0"
				"Conflict\0"
				"Gone\0"
				"Length Required\0"
				"Precondition Failed\0"
				"Request Entity Too Large\0"
				"Request-URI Too Long\0"
				"Unsupported Media Type\0"
				"Requested Range Not Satisfiable\0"
				"Expectation Failed\0";

#define NUM_5XX_CODES 11
static const char *Http5xxCodes[NUM_5XX_CODES];
static const char *Http5xxStr = "Internal Server Error\0"
				"Not Implemented\0"
				"Bad Gateway\0"
				"Service Unavailable\0"
				"Gateway Timeout\0"
				"HTTP Version Not Supported\0"
				"Variant Also Negotiates\0"
				"Insufficient Storage\0"
				"Loop Detected\0"
				"\0"
				"Not Extended\0";

static int gInitialized = 0;

/************************************************************************
************************* Functions *************************************
************************************************************************/

/************************************************************************
 * Function: init_table
 *
 * Parameters:
 *	IN const char* encoded_str ; status code encoded string
 *	OUT const char *table[] ; table to store the encoded status code
 *							  strings
 *	IN int tbl_size ;	size of the table
 *
 * Description: Initializing table representing an array of string
 *	pointers with the individual strings that are comprised in the
 *	input const char* encoded_str parameter.
 *
 * Returns:
 *	 void
 ************************************************************************/
static UPNP_INLINE void init_table(
	const char *encoded_str, const char *table[], int tbl_size)
{
	int i;
	const char *s = encoded_str;

	for (i = 0; i < tbl_size; i++) {
		table[i] = s;
		s += strlen(s) + (size_t)1; /* next entry */
	}
}

/************************************************************************
 * Function: init_tables
 *
 * Parameters:
 *	none
 *
 * Description: Initializing tables with HTTP strings and different HTTP
 * codes.
 *
 * Returns:
 *	 void
 ************************************************************************/
static UPNP_INLINE void init_tables(void)
{
	init_table(Http1xxStr, Http1xxCodes, NUM_1XX_CODES);
	init_table(Http2xxStr, Http2xxCodes, NUM_2XX_CODES);
	init_table(Http3xxStr, Http3xxCodes, NUM_3XX_CODES);
	init_table(Http4xxStr, Http4xxCodes, NUM_4XX_CODES);
	init_table(Http5xxStr, Http5xxCodes, NUM_5XX_CODES);

	gInitialized = 1; /* mark only after complete */
}

/************************************************************************
 * Function: http_get_code_text
 *
 * Parameters:
 *	int statusCode ; Status code based on which the status table and
 *					status message is returned
 *
 * Description: Return the right status message based on the passed in
 *	int statusCode input parameter
 *
 * Returns:
 *	 const char* ptr - pointer to the status message string
 ************************************************************************/
const char *http_get_code_text(int statusCode)
{
	int index;
	int table_num;

	if (!gInitialized) {
		init_tables();
	}

	if (statusCode < 100 || statusCode >= 600) {
		return NULL;
	}

	index = statusCode % 100;
	table_num = statusCode / 100;

	if (table_num == 1 && index < NUM_1XX_CODES) {
		return Http1xxCodes[index];
	}

	if (table_num == 2 && index < NUM_2XX_CODES) {
		return Http2xxCodes[index];
	}

	if (table_num == 3 && index < NUM_3XX_CODES) {
		return Http3xxCodes[index];
	}

	if (table_num == 4 && index < NUM_4XX_CODES) {
		return Http4xxCodes[index];
	}

	if (table_num == 5 && index < NUM_5XX_CODES) {
		return Http5xxCodes[index];
	}

	return NULL;
}
