#include <stdint.h>

#include <stdlib.h>

#include <gc.h>

#include "wc.h"

#include "wtf.h"

static void *die_oom(size_t bytes) {

    fprintf(stderr, "Out of memory: %lu bytes unavailable!\n", (unsigned long)bytes);

    exit(1);

}

int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size){

    static int init_done = 0;

    if (!init_done) {

  setenv("GC_LARGE_ALLOC_WARN_INTERVAL", "30000", 1);

  GC_INIT();

#if (GC_VERSION_MAJOR>7) || ((GC_VERSION_MAJOR==7) && (GC_VERSION_MINOR>=2))

  GC_set_oom_fn(die_oom);

#else

  GC_oom_fn = die_oom;

#endif

#ifdef USE_M17N

#ifdef USE_UNICODE

  wtf_init(WC_CES_UTF_8, WC_CES_UTF_8);

#else

  wtf_init(WC_CES_EUC_JP, WC_CES_EUC_JP);

#endif

#endif

  init_done = 1;

    }

    /* Assume the data format is:

     *   <str1> \0 <str2> \0 <str3>

     */

    const uint8_t *str1, *str2, *str3;

    const uint8_t *p;

    str1 = data;

    p = memchr(str1, '\0', size);

    if (p == NULL) return 0;

    str2 = p + 1;

    if (str2 >= data + size) return 0;

    p = memchr(str2, '\0', data + size - str2);

    if (p == NULL) return 0;

    str3 = p + 1;

    wc_ces old, from, to;

    from = wc_guess_charset_short((char*)str1, 0);

    to = wc_guess_charset_short((char*)str2, 0);

    Str s = Strnew_charp_n((char*)str3, data + size - str3);

    wc_Str_conv_with_detect(s, &from, from, to);

    Strfree(s);

    return 0;

}