/*

  Copyright (C) 1997-2013 Sam Lantinga <slouken@libsdl.org>

  This software is provided 'as-is', without any express or implied

  warranty.  In no event will the authors be held liable for any damages

  arising from the use of this software.

  Permission is granted to anyone to use this software for any purpose,

  including commercial applications, and to alter it and redistribute it

  freely.

*/

#include <stdio.h>

#include "SDL.h"

static size_t

widelen(char *data)

{

    size_t len = 0;

    Uint32 *p = (Uint32 *) data;

    while (*p++) {

        ++len;

    }

    return len;

}

int

main(int argc, char *argv[])

{

    const char *formats[] = {

        "UTF8",

        "UTF-8",

        "UTF16BE",

        "UTF-16BE",

        "UTF16LE",

        "UTF-16LE",

        "UTF32BE",

        "UTF-32BE",

        "UTF32LE",

        "UTF-32LE",

        "UCS4",

        "UCS-4",

    };

    char buffer[BUFSIZ];

    char *ucs4;

    char *test[2];

    int i;

    FILE *file;

    int errors = 0;

    /* Enable standard application logging */

    SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);

    if (!argv[1]) {

        argv[1] = "utf8.txt";

    }

    file = fopen(argv[1], "rb");

    if (!file) {

        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Unable to open %s\n", argv[1]);

        return (1);

    }

    while (fgets(buffer, sizeof(buffer), file)) {

        /* Convert to UCS-4 */

        size_t len;

        ucs4 =

            SDL_iconv_string("UCS-4", "UTF-8", buffer,

                             SDL_strlen(buffer) + 1);

        len = (widelen(ucs4) + 1) * 4;

        for (i = 0; i < SDL_arraysize(formats); ++i) {

            test[0] = SDL_iconv_string(formats[i], "UCS-4", ucs4, len);

            test[1] = SDL_iconv_string("UCS-4", formats[i], test[0], len);

            if (!test[1] || SDL_memcmp(test[1], ucs4, len) != 0) {

                SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "FAIL: %s\n", formats[i]);

                ++errors;

            }

        }

        test[0] = SDL_iconv_string("UTF-8", "UCS-4", ucs4, len);

        SDL_free(ucs4);

        fputs(test[0], stdout);

        SDL_free(test[0]);

    }

    fclose(file);

    return (errors ? errors + 1 : 0);

}