/* GLIB - Library of useful routines for C programming
 * Copyright (C) 1995-1997  Peter Mattis, Spencer Kimball and Josh MacDonald
 *
 * This 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 2 of the License, or (at your option) any later version.
 *
 * This 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 this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

/*
 * Modified by the GLib Team and others 1997-2000.  See the AUTHORS
 * file for a list of people on the GLib Team.  See the ChangeLog
 * files for a list of changes.  These files are distributed with
 * GLib at ftp://ftp.gtk.org/pub/gtk/. 
 */

#undef G_DISABLE_ASSERT
#undef G_LOG_DOMAIN

#include <string.h>

#include <glib.h>

/* Bug 311337 */
static void
test_iconv_state (void)
{
  gchar *in = "\xf4\xe5\xf8\xe5\xed";
  gchar *expected = "\xd7\xa4\xd7\x95\xd7\xa8\xd7\x95\xd7\x9d";
  gchar *out;
  gsize bytes_read = 0;
  gsize bytes_written = 0;
  GError *error = NULL;

  out = g_convert (in, -1, "UTF-8", "CP1255", 
		   &bytes_read, &bytes_written, &error);

  if (error && error->code == G_CONVERT_ERROR_NO_CONVERSION)
    return; /* silently skip if CP1255 is not supported, see bug 467707 */ 

  g_assert (error == NULL);
  g_assert (bytes_read == 5);
  g_assert (bytes_written == 10);
  g_assert (strcmp (out, expected) == 0);
  g_free (out);
}

/* some tests involving "vulgar fraction one half" */
static void 
test_one_half (void)
{
  gchar *in = "\xc2\xbd";
  gchar *out;
  gsize bytes_read = 0;
  gsize bytes_written = 0;
  GError *error = NULL;  

  out = g_convert (in, -1, 
		   "ISO-8859-1", "UTF-8",
		   &bytes_read, &bytes_written,
		   &error);

  g_assert (error == NULL);
  g_assert (bytes_read == 2);
  g_assert (bytes_written == 1);
  g_assert (strcmp (out, "\xbd") == 0);
  g_free (out);

  out = g_convert (in, -1, 
		   "ISO-8859-15", "UTF-8",
		   &bytes_read, &bytes_written,
		   &error);

  g_assert (error && error->code == G_CONVERT_ERROR_ILLEGAL_SEQUENCE);
  g_assert (bytes_read == 0);
  g_assert (bytes_written == 0);
  g_assert (out == NULL);
  g_clear_error (&error);
  g_free (out);

  out = g_convert_with_fallback (in, -1, 
				 "ISO8859-15", "UTF-8",
				 "a",
				 &bytes_read, &bytes_written,
				 &error);

  g_assert (error == NULL);
  g_assert (bytes_read == 2);
  g_assert (bytes_written == 1);
  g_assert (strcmp (out, "a") == 0);
  g_free (out);
}

static void
test_byte_order (void)
{
  gchar in_be[4] = { 0xfe, 0xff, 0x03, 0x93}; /* capital gamma */
  gchar in_le[4] = { 0xff, 0xfe, 0x93, 0x03};
  gchar *expected = "\xce\x93";
  gchar *out;
  gsize bytes_read = 0;
  gsize bytes_written = 0;
  GError *error = NULL;  

  out = g_convert (in_be, sizeof (in_be), 
		   "UTF-8", "UTF-16",
		   &bytes_read, &bytes_written,
		   &error);

  g_assert (error == NULL);
  g_assert (bytes_read == 4);
  g_assert (bytes_written == 2);
  g_assert (strcmp (out, expected) == 0);
  g_free (out);

  out = g_convert (in_le, sizeof (in_le), 
		   "UTF-8", "UTF-16",
		   &bytes_read, &bytes_written,
		   &error);

  g_assert (error == NULL);
  g_assert (bytes_read == 4);
  g_assert (bytes_written == 2);
  g_assert (strcmp (out, expected) == 0);
  g_free (out);
}

static void
check_utf8_to_ucs4 (const char     *utf8,
		    glong           utf8_len,
		    const gunichar *ucs4,
		    glong           ucs4_len,
		    glong           error_pos)
{
  gunichar *result, *result2, *result3;
  glong items_read, items_read2;
  glong items_written, items_written2;
  GError *error, *error2, *error3;
  gint i;

  if (!error_pos)
    {
      /* check the fast conversion */
      result = g_utf8_to_ucs4_fast (utf8, utf8_len, &items_written);

      g_assert (items_written == ucs4_len);
      g_assert (result);
      for (i = 0; i <= items_written; i++)
	g_assert (result[i] == ucs4[i]);      

      g_free (result);
    }

  error = NULL;
  result = g_utf8_to_ucs4 (utf8, utf8_len, &items_read, &items_written, &error);
  
  if (utf8_len == strlen (utf8))
    {
      /* check that len == -1 yields identical results */
      error2 = NULL;
      result2 = g_utf8_to_ucs4 (utf8, -1, &items_read2, &items_written2, &error2);
      g_assert (error || items_read2 == items_read);
      g_assert (error || items_written2 == items_written2);
      g_assert (!!result == !!result2);
      g_assert (!!error == !!error2);
      if (result)
	for (i = 0; i <= items_written; i++)
	  g_assert (result[i] == result2[i]);

      g_free (result2);
      if (error2)
	g_error_free (error2);
    }

  error3 = NULL;
  result3 = g_utf8_to_ucs4 (utf8, utf8_len, NULL, NULL, &error3);
      
  if (error3 && error3->code == G_CONVERT_ERROR_PARTIAL_INPUT)
    {
      g_assert (error == NULL);
      g_assert (items_read == error_pos);
      g_assert (items_written == ucs4_len);
      g_assert (result);
      for (i = 0; i <= items_written; i++)
	g_assert (result[i] == ucs4[i]);
    }
  else if (error_pos)
    {
      g_assert (error != NULL);
      g_assert (result == NULL);
      g_assert (items_read == error_pos);
      g_error_free (error);

      g_assert (error3 != NULL);
      g_assert (result3 == NULL);
      g_error_free (error3);
    }
  else
    {
      g_assert (error == NULL);
      g_assert (items_read == utf8_len);
      g_assert (items_written == ucs4_len);
      g_assert (result);
      for (i = 0; i <= items_written; i++)
	g_assert (result[i] == ucs4[i]);

      g_assert (error3 == NULL);
      g_assert (result3);
      for (i = 0; i <= ucs4_len; i++)
	g_assert (result3[i] == ucs4[i]);
    }

  g_free (result);
  g_free (result3);
}

static void
check_ucs4_to_utf8 (const gunichar *ucs4,
		    glong           ucs4_len,
		    const char     *utf8,
		    glong           utf8_len,
		    glong           error_pos)
{
  gchar *result, *result2, *result3;
  glong items_read, items_read2;
  glong items_written, items_written2;
  GError *error, *error2, *error3;

  error = NULL;
  result = g_ucs4_to_utf8 (ucs4, ucs4_len, &items_read, &items_written, &error);

  if (ucs4[ucs4_len] == 0)
    {
      /* check that len == -1 yields identical results */
      error2 = NULL;
      result2 = g_ucs4_to_utf8 (ucs4, -1, &items_read2, &items_written2, &error2);
      
      g_assert (error || items_read2 == items_read);
      g_assert (error || items_written2 == items_written);
      g_assert (!!result == !!result2);
      g_assert (!!error == !!error2);
      if (result)
	g_assert (strcmp (result, result2) == 0);

      g_free (result2);
      if (error2)
	g_error_free (error2);
    }

  error3 = NULL;
  result3 = g_ucs4_to_utf8 (ucs4, ucs4_len, NULL, NULL, &error3);
      
  if (error_pos)
    {
      g_assert (error != NULL);
      g_assert (result == NULL);
      g_assert (items_read == error_pos);
      g_error_free (error);

      g_assert (error3 != NULL);
      g_assert (result3 == NULL);
      g_error_free (error3);
    }
  else
    {
      g_assert (error == NULL);
      g_assert (items_read == ucs4_len);
      g_assert (items_written == utf8_len);
      g_assert (result);
      g_assert (strcmp (result, utf8) == 0);

      g_assert (error3 == NULL);
      g_assert (result3);
      g_assert (strcmp (result3, utf8) == 0);
    }

  g_free (result);
  g_free (result3);
}

static void
check_utf8_to_utf16 (const char      *utf8,
		     glong            utf8_len,
		     const gunichar2 *utf16,
		     glong            utf16_len,
		     glong            error_pos)
{
  gunichar2 *result, *result2, *result3;
  glong items_read, items_read2;
  glong items_written, items_written2;
  GError *error, *error2, *error3;
  gint i;

  error = NULL;
  result = g_utf8_to_utf16 (utf8, utf8_len, &items_read, &items_written, &error);

  if (utf8_len == strlen (utf8))
    {
      /* check that len == -1 yields identical results */
      error2 = NULL;
      result2 = g_utf8_to_utf16 (utf8, -1, &items_read2, &items_written2, &error2);
      g_assert (error || items_read2 == items_read);
      g_assert (error || items_written2 == items_written2);
      g_assert (!!result == !!result2);
      g_assert (!!error == !!error2);
      if (result)
	for (i = 0; i <= items_written; i++)
	  g_assert (result[i] == result2[i]);
      
      g_free (result2);
      if (error2)
	g_error_free (error2);
    }

  error3 = NULL;
  result3 = g_utf8_to_utf16 (utf8, utf8_len, NULL, NULL, &error3);
      
  if (error3 && error3->code == G_CONVERT_ERROR_PARTIAL_INPUT)
    {
      g_assert (error == NULL);
      g_assert (items_read == error_pos);
      g_assert (items_written == utf16_len);
      g_assert (result);
      for (i = 0; i <= items_written; i++)
	g_assert (result[i] == utf16[i]);
    }
  else if (error_pos)
    {
      g_assert (error != NULL);
      g_assert (result == NULL);
      g_assert (items_read == error_pos);
      g_error_free (error);

      g_assert (error3 != NULL);
      g_assert (result3 == NULL);
      g_error_free (error3);
    }
  else
    {
      g_assert (error == NULL);
      g_assert (items_read == utf8_len);
      g_assert (items_written == utf16_len);
      g_assert (result);
      for (i = 0; i <= items_written; i++)
	g_assert (result[i] == utf16[i]);

      g_assert (error3 == NULL);
      g_assert (result3);
      for (i = 0; i <= utf16_len; i++)
	g_assert (result3[i] == utf16[i]);
    }

  g_free (result);
  g_free (result3);
}

static void
check_utf16_to_utf8 (const gunichar2 *utf16,
		     glong            utf16_len,
		     const char      *utf8,
		     glong            utf8_len,
		     glong            error_pos)
{
  gchar *result, *result2, *result3;
  glong items_read, items_read2;
  glong items_written, items_written2;
  GError *error, *error2, *error3;

  error = NULL;
  result = g_utf16_to_utf8 (utf16, utf16_len, &items_read, &items_written, &error);
  if (utf16[utf16_len] == 0)
    {
      /* check that len == -1 yields identical results */
      error2 = NULL;
      result2 = g_utf16_to_utf8 (utf16, -1, &items_read2, &items_written2, &error2);
      
      g_assert (error || items_read2 == items_read);
      g_assert (error || items_written2 == items_written);
      g_assert (!!result == !!result2);
      g_assert (!!error == !!error2);
      if (result)
	g_assert (strcmp (result, result2) == 0);

      g_free (result2);
      if (error2)
	g_error_free (error2);
    }

  error3 = NULL;
  result3 = g_utf16_to_utf8 (utf16, utf16_len, NULL, NULL, &error3);
  
  if (error3 && error3->code == G_CONVERT_ERROR_PARTIAL_INPUT)
    {
      g_assert (error == NULL);
      g_assert (items_read == error_pos);
      g_assert (items_read + 1 == utf16_len);
      g_assert (items_written == utf8_len);
      g_assert (result);
      g_assert (strcmp (result, utf8) == 0);
    }
  else if (error_pos)
    {
      g_assert (error != NULL);
      g_assert (result == NULL);
      g_assert (items_read == error_pos);
      g_error_free (error);

      g_assert (error3 != NULL);
      g_assert (result3 == NULL);
      g_error_free (error3);
    }
  else
    {
      g_assert (error == NULL);
      g_assert (items_read == utf16_len);
      g_assert (items_written == utf8_len);
      g_assert (result);
      g_assert (strcmp (result, utf8) == 0);

      g_assert (error3 == NULL);
      g_assert (result3);
      g_assert (strcmp (result3, utf8) == 0);
    }

  g_free (result);
  g_free (result3);
}

static void
check_ucs4_to_utf16 (const gunichar  *ucs4,
		     glong            ucs4_len,
		     const gunichar2 *utf16,
		     glong            utf16_len,
		     glong            error_pos)
{
  gunichar2 *result, *result2, *result3;
  glong items_read, items_read2;
  glong items_written, items_written2;
  GError *error, *error2, *error3;
  gint i;

  error = NULL;
  result = g_ucs4_to_utf16 (ucs4, ucs4_len, &items_read, &items_written, &error);

  if (ucs4[ucs4_len] == 0)
    {
      /* check that len == -1 yields identical results */
      error2 = NULL;
      result2 = g_ucs4_to_utf16 (ucs4, -1, &items_read2, &items_written2, &error2);
      
      g_assert (error || items_read2 == items_read);
      g_assert (error || items_written2 == items_written);
      g_assert (!!result == !!result2);
      g_assert (!!error == !!error2);
      if (result)
      for (i = 0; i <= utf16_len; i++)
	g_assert (result[i] == result2[i]);

      g_free (result2);
      if (error2)
	g_error_free (error2);
    }

  error3 = NULL;
  result3 = g_ucs4_to_utf16 (ucs4, -1, NULL, NULL, &error3);
      
  if (error_pos)
    {
      g_assert (error != NULL);
      g_assert (result == NULL);
      g_assert (items_read == error_pos);
      g_error_free (error);

      g_assert (error3 != NULL);
      g_assert (result3 == NULL);
      g_error_free (error3);
    }
  else
    {
      g_assert (error == NULL);
      g_assert (items_read == ucs4_len);
      g_assert (items_written == utf16_len);
      g_assert (result);
      for (i = 0; i <= utf16_len; i++)
	g_assert (result[i] == utf16[i]);

      g_assert (error3 == NULL);
      g_assert (result3);
      for (i = 0; i <= utf16_len; i++)
	g_assert (result3[i] == utf16[i]);
    }

  g_free (result);
  g_free (result3);
}

static void
check_utf16_to_ucs4 (const gunichar2 *utf16,
		     glong            utf16_len,
		     const gunichar  *ucs4,
		     glong            ucs4_len,
		     glong            error_pos)
{
  gunichar *result, *result2, *result3;
  glong items_read, items_read2;
  glong items_written, items_written2;
  GError *error, *error2, *error3;
  gint i;

  error = NULL;
  result = g_utf16_to_ucs4 (utf16, utf16_len, &items_read, &items_written, &error);
  if (utf16[utf16_len] == 0)
    {
      /* check that len == -1 yields identical results */
      error2 = NULL;
      result2 = g_utf16_to_ucs4 (utf16, -1, &items_read2, &items_written2, &error2);
      g_assert (error || items_read2 == items_read);
      g_assert (error || items_written2 == items_written2);
      g_assert (!!result == !!result2);
      g_assert (!!error == !!error2);
      if (result)
	for (i = 0; i <= items_written; i++)
	  g_assert (result[i] == result2[i]);

      g_free (result2);
      if (error2)
	g_error_free (error2);
    }

  error3 = NULL;
  result3 = g_utf16_to_ucs4 (utf16, utf16_len, NULL, NULL, &error3);
      
  if (error3 && error3->code == G_CONVERT_ERROR_PARTIAL_INPUT)
    {
      g_assert (error == NULL);
      g_assert (items_read == error_pos);
      g_assert (items_read + 1 == utf16_len);
      g_assert (items_written == ucs4_len);
      g_assert (result);
      for (i = 0; i <= items_written; i++)
	g_assert (result[i] == ucs4[i]);
    }
  else if (error_pos)
    {
      g_assert (error != NULL);
      g_assert (result == NULL);
      g_assert (items_read == error_pos);
      g_error_free (error);

      g_assert (error3 != NULL);
      g_assert (result3 == NULL);
      g_error_free (error3);
    }
  else
    {
      g_assert (error == NULL);
      g_assert (items_read == utf16_len);
      g_assert (items_written == ucs4_len);
      g_assert (result);
      for (i = 0; i <= ucs4_len; i++)
	g_assert (result[i] == ucs4[i]);

      g_assert (error3 == NULL);
      g_assert (result3);
      for (i = 0; i <= ucs4_len; i++)
	g_assert (result3[i] == ucs4[i]);
    }

  g_free (result);
  g_free (result3);
}

static void
test_unicode_conversions (void)
{
  char *utf8;
  gunichar ucs4[100];
  gunichar2 utf16[100];

  utf8 = "abc";
  ucs4[0] = 0x61; ucs4[1] = 0x62; ucs4[2] = 0x63; ucs4[3] = 0;
  utf16[0] = 0x61; utf16[1] = 0x62; utf16[2] = 0x63; utf16[3] = 0;

  check_utf8_to_ucs4 (utf8, 3, ucs4, 3, 0);
  check_ucs4_to_utf8 (ucs4, 3, utf8, 3, 0);
  check_utf8_to_utf16 (utf8, 3, utf16, 3, 0);
  check_utf16_to_utf8 (utf16, 3, utf8, 3, 0);
  check_ucs4_to_utf16 (ucs4, 3, utf16, 3, 0);
  check_utf16_to_ucs4 (utf16, 3, ucs4, 3, 0);

  utf8 = "\316\261\316\262\316\263";
  ucs4[0] = 0x03b1; ucs4[1] = 0x03b2; ucs4[2] = 0x03b3; ucs4[3] = 0;
  utf16[0] = 0x03b1; utf16[1] = 0x03b2; utf16[2] = 0x03b3; utf16[3] = 0;

  check_utf8_to_ucs4 (utf8, 6, ucs4, 3, 0);
  check_ucs4_to_utf8 (ucs4, 3, utf8, 6, 0);
  check_utf8_to_utf16 (utf8, 6, utf16, 3, 0);
  check_utf16_to_utf8 (utf16, 3, utf8, 6, 0);
  check_ucs4_to_utf16 (ucs4, 3, utf16, 3, 0);
  check_utf16_to_ucs4 (utf16, 3, ucs4, 3, 0);

  /* partial utf8 character */
  utf8 = "abc\316";
  ucs4[0] = 0x61; ucs4[1] = 0x62; ucs4[2] = 0x63; ucs4[3] = 0;
  utf16[0] = 0x61; utf16[1] = 0x62; utf16[2] = 0x63; utf16[3] = 0;

  check_utf8_to_ucs4 (utf8, 4, ucs4, 3, 3);
  check_utf8_to_utf16 (utf8, 4, utf16, 3, 3);

  /* invalid utf8 */
  utf8 = "abc\316\316";
  ucs4[0] = 0; 
  utf16[0] = 0; 

  check_utf8_to_ucs4 (utf8, 5, ucs4, 0, 3);
  check_utf8_to_utf16 (utf8, 5, utf16, 0, 3);

  /* partial utf16 character */
  utf8 = "ab";
  ucs4[0] = 0x61; ucs4[1] = 0x62; ucs4[2] = 0;
  utf16[0] = 0x61; utf16[1] = 0x62; utf16[2] = 0xd801; utf16[3] = 0;
  
  check_utf16_to_utf8 (utf16, 3, utf8, 2, 2);
  check_utf16_to_ucs4 (utf16, 3, ucs4, 2, 2);

  /* invalid utf16 */
  utf8 = NULL;
  ucs4[0] = 0;
  utf16[0] = 0x61; utf16[1] = 0x62; utf16[2] = 0xdc01; utf16[3] = 0;

  check_utf16_to_utf8 (utf16, 3, utf8, 0, 2);
  check_utf16_to_ucs4 (utf16, 3, ucs4, 0, 2);

  /* invalid ucs4 */
  utf8 = NULL;
  ucs4[0] = 0x61; ucs4[1] = 0x62; ucs4[2] = 0x80000000; ucs4[3] = 0;
  utf16[0] = 0;

  check_ucs4_to_utf8 (ucs4, 3, utf8, 0, 2);
  check_ucs4_to_utf16 (ucs4, 3, utf16, 0, 2);
}

int
main (int argc, char *argv[])
{
  test_iconv_state ();
  test_one_half ();
  test_byte_order ();
  test_unicode_conversions ();

  return 0;
}