/* Test of conversion of multibyte character to wide character.
   Copyright (C) 2008 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program 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 General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

/* Written by Bruno Haible <bruno@clisp.org>, 2008.  */

#include <config.h>

#include <wchar.h>

#include <locale.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define ASSERT(expr) \
  do									     \
    {									     \
      if (!(expr))							     \
        {								     \
          fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
          fflush (stderr);						     \
          abort ();							     \
        }								     \
    }									     \
  while (0)

int
main (int argc, char *argv[])
{
  mbstate_t state;
  wchar_t wc;
  size_t ret;

  /* configure should already have checked that the locale is supported.  */
  if (setlocale (LC_ALL, "") == NULL)
    return 1;

  /* Test zero-length input.  */
  {
    memset (&state, '\0', sizeof (mbstate_t));
    wc = (wchar_t) 0xBADFACE;
    ret = mbrtowc (&wc, "x", 0, &state);
    /* gnulib's implementation returns (size_t)(-2).
       The AIX 5.1 implementation returns (size_t)(-1).
       glibc's implementation returns 0.  */
    ASSERT (ret == (size_t)(-2) || ret == (size_t)(-1) || ret == 0);
    ASSERT (mbsinit (&state));
  }

  /* Test NUL byte input.  */
  {
    memset (&state, '\0', sizeof (mbstate_t));
    wc = (wchar_t) 0xBADFACE;
    ret = mbrtowc (&wc, "", 1, &state);
    ASSERT (ret == 0);
    ASSERT (wc == 0);
    ASSERT (mbsinit (&state));
    ret = mbrtowc (NULL, "", 1, &state);
    ASSERT (ret == 0);
    ASSERT (mbsinit (&state));
  }

  /* Test single-byte input.  */
  {
    int c;
    char buf[1];

    memset (&state, '\0', sizeof (mbstate_t));
    for (c = 0; c < 0x100; c++)
      switch (c)
	{
	case '\t': case '\v': case '\f':
	case ' ': case '!': case '"': case '#': case '%':
	case '&': case '\'': case '(': case ')': case '*':
	case '+': case ',': case '-': case '.': case '/':
	case '0': case '1': case '2': case '3': case '4':
	case '5': case '6': case '7': case '8': case '9':
	case ':': case ';': case '<': case '=': case '>':
	case '?':
	case 'A': case 'B': case 'C': case 'D': case 'E':
	case 'F': case 'G': case 'H': case 'I': case 'J':
	case 'K': case 'L': case 'M': case 'N': case 'O':
	case 'P': case 'Q': case 'R': case 'S': case 'T':
	case 'U': case 'V': case 'W': case 'X': case 'Y':
	case 'Z':
	case '[': case '\\': case ']': case '^': case '_':
	case 'a': case 'b': case 'c': case 'd': case 'e':
	case 'f': case 'g': case 'h': case 'i': case 'j':
	case 'k': case 'l': case 'm': case 'n': case 'o':
	case 'p': case 'q': case 'r': case 's': case 't':
	case 'u': case 'v': case 'w': case 'x': case 'y':
	case 'z': case '{': case '|': case '}': case '~':
	  /* c is in the ISO C "basic character set".  */
	  buf[0] = c;
	  wc = (wchar_t) 0xBADFACE;
	  ret = mbrtowc (&wc, buf, 1, &state);
	  ASSERT (ret == 1);
	  ASSERT (wc == c);
	  ASSERT (mbsinit (&state));
	  ret = mbrtowc (NULL, buf, 1, &state);
	  ASSERT (ret == 1);
	  ASSERT (mbsinit (&state));
	  break;
	}
  }

  /* Test special calling convention, passing a NULL pointer.  */
  {
    memset (&state, '\0', sizeof (mbstate_t));
    wc = (wchar_t) 0xBADFACE;
    ret = mbrtowc (&wc, NULL, 5, &state);
    ASSERT (ret == 0);
    ASSERT (wc == (wchar_t) 0xBADFACE);
    ASSERT (mbsinit (&state));
  }

  if (argc > 1)
    switch (argv[1][0])
      {
      case '1':
	/* Locale encoding is ISO-8859-1 or ISO-8859-15.  */
	{
	  char input[] = "B\374\337er"; /* "Büßer" */
	  memset (&state, '\0', sizeof (mbstate_t));

	  wc = (wchar_t) 0xBADFACE;
	  ret = mbrtowc (&wc, input, 1, &state);
	  ASSERT (ret == 1);
	  ASSERT (wc == 'B');
	  ASSERT (mbsinit (&state));
	  input[0] = '\0';

	  wc = (wchar_t) 0xBADFACE;
	  ret = mbrtowc (&wc, input + 1, 1, &state);
	  ASSERT (ret == 1);
	  ASSERT (wctob (wc) == (unsigned char) '\374');
	  ASSERT (mbsinit (&state));
	  input[1] = '\0';

	  wc = (wchar_t) 0xBADFACE;
	  ret = mbrtowc (&wc, input + 2, 3, &state);
	  ASSERT (ret == 1);
	  ASSERT (wctob (wc) == (unsigned char) '\337');
	  ASSERT (mbsinit (&state));
	  input[2] = '\0';

	  wc = (wchar_t) 0xBADFACE;
	  ret = mbrtowc (&wc, input + 3, 2, &state);
	  ASSERT (ret == 1);
	  ASSERT (wc == 'e');
	  ASSERT (mbsinit (&state));
	  input[3] = '\0';

	  wc = (wchar_t) 0xBADFACE;
	  ret = mbrtowc (&wc, input + 4, 1, &state);
	  ASSERT (ret == 1);
	  ASSERT (wc == 'r');
	  ASSERT (mbsinit (&state));
	}
	return 0;

      case '2':
	/* Locale encoding is UTF-8.  */
	{
	  char input[] = "B\303\274\303\237er"; /* "Büßer" */
	  memset (&state, '\0', sizeof (mbstate_t));

	  wc = (wchar_t) 0xBADFACE;
	  ret = mbrtowc (&wc, input, 1, &state);
	  ASSERT (ret == 1);
	  ASSERT (wc == 'B');
	  ASSERT (mbsinit (&state));
	  input[0] = '\0';

	  wc = (wchar_t) 0xBADFACE;
	  ret = mbrtowc (&wc, input + 1, 1, &state);
	  ASSERT (ret == (size_t)(-2));
	  ASSERT (wc == (wchar_t) 0xBADFACE);
	  ASSERT (!mbsinit (&state));
	  input[1] = '\0';

	  wc = (wchar_t) 0xBADFACE;
	  ret = mbrtowc (&wc, input + 2, 5, &state);
	  ASSERT (ret == 1);
	  ASSERT (wctob (wc) == EOF);
	  ASSERT (mbsinit (&state));
	  input[2] = '\0';

	  wc = (wchar_t) 0xBADFACE;
	  ret = mbrtowc (&wc, input + 3, 4, &state);
	  ASSERT (ret == 2);
	  ASSERT (wctob (wc) == EOF);
	  ASSERT (mbsinit (&state));
	  input[3] = '\0';
	  input[4] = '\0';

	  wc = (wchar_t) 0xBADFACE;
	  ret = mbrtowc (&wc, input + 5, 2, &state);
	  ASSERT (ret == 1);
	  ASSERT (wc == 'e');
	  ASSERT (mbsinit (&state));
	  input[5] = '\0';

	  wc = (wchar_t) 0xBADFACE;
	  ret = mbrtowc (&wc, input + 6, 1, &state);
	  ASSERT (ret == 1);
	  ASSERT (wc == 'r');
	  ASSERT (mbsinit (&state));
	}
	return 0;

      case '3':
	/* Locale encoding is EUC-JP.  */
	{
	  char input[] = "<\306\374\313\334\270\354>"; /* "<日本語>" */
	  memset (&state, '\0', sizeof (mbstate_t));

	  wc = (wchar_t) 0xBADFACE;
	  ret = mbrtowc (&wc, input, 1, &state);
	  ASSERT (ret == 1);
	  ASSERT (wc == '<');
	  ASSERT (mbsinit (&state));
	  input[0] = '\0';

	  wc = (wchar_t) 0xBADFACE;
	  ret = mbrtowc (&wc, input + 1, 2, &state);
	  ASSERT (ret == 2);
	  ASSERT (wctob (wc) == EOF);
	  ASSERT (mbsinit (&state));
	  input[1] = '\0';
	  input[2] = '\0';

	  wc = (wchar_t) 0xBADFACE;
	  ret = mbrtowc (&wc, input + 3, 1, &state);
	  ASSERT (ret == (size_t)(-2));
	  ASSERT (wc == (wchar_t) 0xBADFACE);
	  ASSERT (!mbsinit (&state));
	  input[3] = '\0';

	  wc = (wchar_t) 0xBADFACE;
	  ret = mbrtowc (&wc, input + 4, 4, &state);
	  ASSERT (ret == 1);
	  ASSERT (wctob (wc) == EOF);
	  ASSERT (mbsinit (&state));
	  input[4] = '\0';

	  wc = (wchar_t) 0xBADFACE;
	  ret = mbrtowc (&wc, input + 5, 3, &state);
	  ASSERT (ret == 2);
	  ASSERT (wctob (wc) == EOF);
	  ASSERT (mbsinit (&state));
	  input[5] = '\0';
	  input[6] = '\0';

	  wc = (wchar_t) 0xBADFACE;
	  ret = mbrtowc (&wc, input + 7, 1, &state);
	  ASSERT (ret == 1);
	  ASSERT (wc == '>');
	  ASSERT (mbsinit (&state));
	}
	return 0;

      case '4':
	/* Locale encoding is GB18030.  */
	{
	  char input[] = "B\250\271\201\060\211\070er"; /* "Büßer" */
	  memset (&state, '\0', sizeof (mbstate_t));

	  wc = (wchar_t) 0xBADFACE;
	  ret = mbrtowc (&wc, input, 1, &state);
	  ASSERT (ret == 1);
	  ASSERT (wc == 'B');
	  ASSERT (mbsinit (&state));
	  input[0] = '\0';

	  wc = (wchar_t) 0xBADFACE;
	  ret = mbrtowc (&wc, input + 1, 1, &state);
	  ASSERT (ret == (size_t)(-2));
	  ASSERT (wc == (wchar_t) 0xBADFACE);
	  ASSERT (!mbsinit (&state));
	  input[1] = '\0';

	  wc = (wchar_t) 0xBADFACE;
	  ret = mbrtowc (&wc, input + 2, 7, &state);
	  ASSERT (ret == 1);
	  ASSERT (wctob (wc) == EOF);
	  ASSERT (mbsinit (&state));
	  input[2] = '\0';

	  wc = (wchar_t) 0xBADFACE;
	  ret = mbrtowc (&wc, input + 3, 6, &state);
	  ASSERT (ret == 4);
	  ASSERT (wctob (wc) == EOF);
	  ASSERT (mbsinit (&state));
	  input[3] = '\0';
	  input[4] = '\0';
	  input[5] = '\0';
	  input[6] = '\0';

	  wc = (wchar_t) 0xBADFACE;
	  ret = mbrtowc (&wc, input + 7, 2, &state);
	  ASSERT (ret == 1);
	  ASSERT (wc == 'e');
	  ASSERT (mbsinit (&state));
	  input[5] = '\0';

	  wc = (wchar_t) 0xBADFACE;
	  ret = mbrtowc (&wc, input + 8, 1, &state);
	  ASSERT (ret == 1);
	  ASSERT (wc == 'r');
	  ASSERT (mbsinit (&state));
	}
	return 0;
      }

  return 1;
}
