statcodes.cpp

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/*******************************************************************************
 *
 * Copyright (c) 2000-2003 Intel Corporation
 * All rights reserved.
 * Copyright (c) 2012 France Telecom All rights reserved.
 * Copyright (C) 2021+ GPL 3 and higher by Ingo Höft, <Ingo@Hoeft-online.de>
 * Redistribution only with this Copyright remark. Last modified: 2025-05-29
 *
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 * 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.
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 * may be used to endorse or promote products derived from this software
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#include <statcodes.hpp>
#include <upnp.hpp>
 
#include <string.h>
 
namespace {
 
constexpr int NUM_1XX_CODES{2};
const char* Http1xxCodes[NUM_1XX_CODES];
const char* Http1xxStr = "Continue\0"
                         "Switching Protocols\0";
 
constexpr int NUM_2XX_CODES{7};
const char* Http2xxCodes[NUM_2XX_CODES];
const char* Http2xxStr = "OK\0"
                         "Created\0"
                         "Accepted\0"
                         "Non-Authoratative Information\0"
                         "No Content\0"
                         "Reset Content\0"
                         "Partial Content\0";
 
constexpr int NUM_3XX_CODES{8};
const char* Http3xxCodes[NUM_3XX_CODES];
const char* Http3xxStr = "Multiple Choices\0"
                         "Moved Permanently\0"
                         "Found\0"
                         "See Other\0"
                         "Not Modified\0"
                         "Use Proxy\0"
                         "\0"
                         "Temporary Redirect\0";
 
constexpr int NUM_4XX_CODES{18};
const char* Http4xxCodes[NUM_4XX_CODES];
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";
 
constexpr int NUM_5XX_CODES{11};
const char* Http5xxCodes[NUM_5XX_CODES];
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";
 
bool gInitialized{false};
 
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 */
    }
}
 
inline void init_tables() {
    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 = true; /* mark only after complete */
}
 
} // anonymous namespace
 
 
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;
}