/*
 * Copyright (C) 2023 The C++ Plus Project.
 * This file is part of the cppp-reiconv Library.
 *
 * The cppp-reiconv Library is free software; you can redistribute it
 * and/or modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either version 3
 * of the License, or (at your option) any later version.
 *
 * The cppp-reiconv Library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with the cppp-reiconv Library; see the file COPYING.
 * If not, see <https://www.gnu.org/licenses/>.
 */

/* Creates the flags.h include file. */

#include <climits>
#include <cstring>
#include <iostream>

/* Consider all encodings, including the system dependent ones. */
#define USE_AIX
#define USE_OSF1
#define USE_DOS
#define USE_ZOS
#define USE_EXTRA

struct loop_funcs
{
};
struct iconv_hooks
{
};
struct iconv_fallbacks
{
};
#define ICONV_SURFACE_EBCDIC_ZOS_UNIX 1
#include "converters.h"

static void emit_encoding(struct wctomb_funcs* ofuncs, const char* c_name)
{
    /* Prepare a converter struct. */
    struct conv_struct conv;
    memset(&conv, '\0', sizeof(conv));
    conv.ofuncs = *ofuncs;

    {
        /* See whether the encoding can encode the accents and quotation marks. */
        ucs4_t probe[6] = {
            0x0060, 0x00b4, 0x2018, 0x2019, 0x3131, 0x3163,
        };
        int res[6];
        int i;
        for (i = 0; i < 6; i++)
        {
            unsigned char buf[10];
            memset(&conv.ostate, '\0', sizeof(state_t));
            res[i] = (conv.ofuncs.xxx_wctomb(&conv, buf, probe[i], sizeof(buf)) != RET_ILUNI);
        }
        printf("#define ei_%s_oflags (", c_name);
        {
            int first = 1;
            if (res[0] && res[1])
            {
                printf("HAVE_ACCENTS");
                first = 0;
            }
            if (res[2] && res[3])
            {
                if (!first)
                    printf(" | ");
                printf("HAVE_QUOTATION_MARKS");
                first = 0;
            }
            if (res[4] && res[5])
            {
                if (!first)
                    printf(" | ");
                printf("HAVE_HANGUL_JAMO");
                first = 0;
            }
            if (first)
                printf("0");
        }
        printf(")\n");
    }
}

int main()
{
    int bitmask = 1;
    printf("/* Generated automatically by genflags. */\n");
    printf("\n");
    printf("/* Set if the encoding can encode\n");
    printf("   the acute and grave accents U+00B4 and U+0060. */\n");
    printf("#define HAVE_ACCENTS %d\n", bitmask);
    printf("\n");
    bitmask = bitmask << 1;
    printf("/* Set if the encoding can encode\n");
    printf("   the single quotation marks U+2018 and U+2019. */\n");
    printf("#define HAVE_QUOTATION_MARKS %d\n", bitmask);
    printf("\n");
    bitmask = bitmask << 1;
    printf("/* Set if the encoding can encode\n");
    printf("   the double-width Hangul letters (Jamo) U+3131 to U+3163. */\n");
    printf("#define HAVE_HANGUL_JAMO %d\n", bitmask);
    printf("\n");

#define DEFENCODING(xxx_names, codepage, xxx, xxx_ifuncs1, xxx_ifuncs2, xxx_ofuncs1, xxx_ofuncs2)                      \
    {                                                                                                                  \
        struct wctomb_funcs ofuncs = xxx_ofuncs1, xxx_ofuncs2;                                                         \
        emit_encoding(&ofuncs, #xxx);                                                                                  \
    }
#define DEFALIAS(xxx_alias, xxx) /* nothing */
/* Consider all encodings, including the system dependent ones. */
#include "encodings.def"
#include "encodings_aix.def"
#include "encodings_dos.def"
#include "encodings_extra.def"
#include "encodings_osf1.def"
#include "encodings_zos.def"
#undef DEFALIAS
#undef DEFENCODING

    if (ferror(stdout) || fclose(stdout))
        return 1;
    return 0;
}