/* Test of character set conversion with error handling and autodetection.
   Copyright (C) 2007-2023 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 <https://www.gnu.org/licenses/>.  */

/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */

#include <config.h>

#include "striconveha.h"

#if HAVE_ICONV
# include <iconv.h>
#endif

#include <errno.h>
#include <stdlib.h>
#include <string.h>

#include "macros.h"
extern int iconv_supports_encoding (const char *encoding);

/* Magic number for detecting bounds violations.  */
#define MAGIC 0x1983EFF1

static size_t *
new_offsets (size_t n)
{
  size_t *offsets = (size_t *) malloc ((n + 1) * sizeof (size_t));
  offsets[n] = MAGIC;
  return offsets;
}

int
main ()
{
#if HAVE_ICONV
  static enum iconv_ilseq_handler handlers[] =
    { iconveh_error, iconveh_question_mark, iconveh_escape_sequence };
  size_t h;
  size_t o;
  size_t i;

  /* Assume that iconv() supports at least the encodings ASCII, ISO-8859-1,
     ISO-8859-2, and UTF-8.  */

  /* ------------------------- Test mem_iconveha() ------------------------- */

  /* Test conversion from ISO-8859-2 to ISO-8859-1 with no errors.  */
  for (h = 0; h < SIZEOF (handlers); h++)
    {
      enum iconv_ilseq_handler handler = handlers[h];
      static const char input[] = "\304rger mit b\366sen B\374bchen ohne Augenma\337";
      static const char expected[] = "\304rger mit b\366sen B\374bchen ohne Augenma\337";
      for (o = 0; o < 2; o++)
        {
          size_t *offsets = (o ? new_offsets (strlen (input)) : NULL);
          char *result = NULL;
          size_t length = 0;
          int retval = mem_iconveha (input, strlen (input),
                                     "ISO-8859-2", "ISO-8859-1",
                                     false, handler,
                                     offsets,
                                     &result, &length);
          ASSERT (retval == 0);
          ASSERT (length == strlen (expected));
          ASSERT (result != NULL && memcmp (result, expected, strlen (expected)) == 0);
          if (o)
            {
              for (i = 0; i < 37; i++)
                ASSERT (offsets[i] == i);
              ASSERT (offsets[37] == MAGIC);
              free (offsets);
            }
          free (result);
        }
    }

  /* Test conversion from ISO-8859-2 to ISO-8859-1 with EILSEQ.  */
  for (h = 0; h < SIZEOF (handlers); h++)
    {
      enum iconv_ilseq_handler handler = handlers[h];
      static const char input[] = "Rafa\263 Maszkowski"; /* Rafał Maszkowski */
      for (o = 0; o < 2; o++)
        {
          size_t *offsets = (o ? new_offsets (strlen (input)) : NULL);
          char *result = NULL;
          size_t length = 0;
          int retval = mem_iconveha (input, strlen (input),
                                     "ISO-8859-2", "ISO-8859-1",
                                     false, handler,
                                     offsets,
                                     &result, &length);
          switch (handler)
            {
            case iconveh_error:
              ASSERT (retval == -1 && errno == EILSEQ);
              ASSERT (result == NULL);
              if (o)
                free (offsets);
              break;
            case iconveh_question_mark:
              {
                static const char expected[] = "Rafa? Maszkowski";
                ASSERT (retval == 0);
                ASSERT (length == strlen (expected));
                ASSERT (result != NULL && memcmp (result, expected, strlen (expected)) == 0);
                if (o)
                  {
                    for (i = 0; i < 16; i++)
                      ASSERT (offsets[i] == i);
                    ASSERT (offsets[16] == MAGIC);
                    free (offsets);
                  }
                free (result);
              }
              break;
            case iconveh_escape_sequence:
              {
                static const char expected[] = "Rafa\\u0142 Maszkowski";
                ASSERT (retval == 0);
                ASSERT (length == strlen (expected));
                ASSERT (result != NULL && memcmp (result, expected, strlen (expected)) == 0);
                if (o)
                  {
                    for (i = 0; i < 16; i++)
                      ASSERT (offsets[i] == (i < 5 ? i :
                                             i + 5));
                    ASSERT (offsets[16] == MAGIC);
                    free (offsets);
                  }
                free (result);
              }
              break;
            }
        }
    }

  /* Test conversion from ISO-8859-1 to UTF-8 with no errors.  */
  for (h = 0; h < SIZEOF (handlers); h++)
    {
      enum iconv_ilseq_handler handler = handlers[h];
      static const char input[] = "\304rger mit b\366sen B\374bchen ohne Augenma\337";
      static const char expected[] = "\303\204rger mit b\303\266sen B\303\274bchen ohne Augenma\303\237";
      for (o = 0; o < 2; o++)
        {
          size_t *offsets = (o ? new_offsets (strlen (input)) : NULL);
          char *result = NULL;
          size_t length = 0;
          int retval = mem_iconveha (input, strlen (input),
                                     "ISO-8859-1", "UTF-8",
                                     false, handler,
                                     offsets,
                                     &result, &length);
          ASSERT (retval == 0);
          ASSERT (length == strlen (expected));
          ASSERT (result != NULL && memcmp (result, expected, strlen (expected)) == 0);
          if (o)
            {
              for (i = 0; i < 37; i++)
                ASSERT (offsets[i] == (i < 1 ? i :
                                       i < 12 ? i + 1 :
                                       i < 18 ? i + 2 :
                                       i + 3));
              ASSERT (offsets[37] == MAGIC);
              free (offsets);
            }
          free (result);
        }
    }

  /* Test conversion from UTF-8 to ISO-8859-1 with no errors.  */
  for (h = 0; h < SIZEOF (handlers); h++)
    {
      enum iconv_ilseq_handler handler = handlers[h];
      static const char input[] = "\303\204rger mit b\303\266sen B\303\274bchen ohne Augenma\303\237";
      static const char expected[] = "\304rger mit b\366sen B\374bchen ohne Augenma\337";
      for (o = 0; o < 2; o++)
        {
          size_t *offsets = (o ? new_offsets (strlen (input)) : NULL);
          char *result = NULL;
          size_t length = 0;
          int retval = mem_iconveha (input, strlen (input),
                                     "UTF-8", "ISO-8859-1",
                                     false, handler,
                                     offsets,
                                     &result, &length);
          ASSERT (retval == 0);
          ASSERT (length == strlen (expected));
          ASSERT (result != NULL && memcmp (result, expected, strlen (expected)) == 0);
          if (o)
            {
              for (i = 0; i < 41; i++)
                ASSERT (offsets[i] == (i < 1 ? i :
                                       i == 1 ? (size_t)(-1) :
                                       i < 13 ? i - 1 :
                                       i == 13 ? (size_t)(-1) :
                                       i < 20 ? i - 2 :
                                       i == 20 ? (size_t)(-1) :
                                       i < 40 ? i - 3 :
                                       (size_t)(-1)));
              ASSERT (offsets[41] == MAGIC);
              free (offsets);
            }
          free (result);
        }
    }

  /* Test conversion from UTF-8 to ISO-8859-1 with EILSEQ.  */
  for (h = 0; h < SIZEOF (handlers); h++)
    {
      enum iconv_ilseq_handler handler = handlers[h];
      static const char input[] = "Rafa\305\202 Maszkowski"; /* Rafał Maszkowski */
      for (o = 0; o < 2; o++)
        {
          size_t *offsets = (o ? new_offsets (strlen (input)) : NULL);
          char *result = NULL;
          size_t length = 0;
          int retval = mem_iconveha (input, strlen (input),
                                     "UTF-8", "ISO-8859-1",
                                     false, handler,
                                     offsets,
                                     &result, &length);
          switch (handler)
            {
            case iconveh_error:
              ASSERT (retval == -1 && errno == EILSEQ);
              ASSERT (result == NULL);
              if (o)
                free (offsets);
              break;
            case iconveh_question_mark:
              {
                static const char expected[] = "Rafa? Maszkowski";
                ASSERT (retval == 0);
                ASSERT (length == strlen (expected));
                ASSERT (result != NULL && memcmp (result, expected, strlen (expected)) == 0);
                if (o)
                  {
                    for (i = 0; i < 17; i++)
                      ASSERT (offsets[i] == (i < 5 ? i :
                                             i == 5 ? (size_t)(-1) :
                                             i - 1));
                    ASSERT (offsets[17] == MAGIC);
                    free (offsets);
                  }
                free (result);
              }
              break;
            case iconveh_escape_sequence:
              {
                static const char expected[] = "Rafa\\u0142 Maszkowski";
                ASSERT (retval == 0);
                ASSERT (length == strlen (expected));
                ASSERT (result != NULL && memcmp (result, expected, strlen (expected)) == 0);
                if (o)
                  {
                    for (i = 0; i < 17; i++)
                      ASSERT (offsets[i] == (i < 5 ? i :
                                             i == 5 ? (size_t)(-1) :
                                             i + 4));
                    ASSERT (offsets[17] == MAGIC);
                    free (offsets);
                  }
                free (result);
              }
              break;
            }
        }
    }

  /* Test conversion from UTF-8 to ISO-8859-1 with EINVAL.  */
  for (h = 0; h < SIZEOF (handlers); h++)
    {
      enum iconv_ilseq_handler handler = handlers[h];
      static const char input[] = "\342";
      for (o = 0; o < 2; o++)
        {
          size_t *offsets = (o ? new_offsets (strlen (input)) : NULL);
          char *result = NULL;
          size_t length = 0;
          int retval = mem_iconveha (input, strlen (input),
                                     "UTF-8", "ISO-8859-1",
                                     false, handler,
                                     offsets,
                                     &result, &length);
          ASSERT (retval == 0);
          ASSERT (length == 0);
          if (o)
            {
              ASSERT (offsets[0] == 0);
              ASSERT (offsets[1] == MAGIC);
              free (offsets);
            }
          free (result);
        }
    }

  /* autodetect_jp is only supported when iconv() support ISO-2022-JP-2.  */
# if defined _LIBICONV_VERSION || !(defined _AIX || defined __sgi || defined __hpux || defined __osf__ || defined __sun)
  if (iconv_supports_encoding ("ISO-2022-JP-2"))
    {
      /* Test conversions from autodetect_jp to UTF-8.  */
      for (h = 0; h < SIZEOF (handlers); h++)
        {
          enum iconv_ilseq_handler handler = handlers[h];
          static const char input[] = "\244\263\244\363\244\313\244\301\244\317"; /* こんにちは in EUC-JP */
          static const char expected[] = "\343\201\223\343\202\223\343\201\253\343\201\241\343\201\257"; /* こんにちは */
          for (o = 0; o < 2; o++)
            {
              size_t *offsets = (o ? new_offsets (strlen (input)) : NULL);
              char *result = NULL;
              size_t length = 0;
              int retval = mem_iconveha (input, strlen (input),
                                         "autodetect_jp", "UTF-8",
                                         false, handler,
                                         offsets,
                                         &result, &length);
              ASSERT (retval == 0);
              ASSERT (length == strlen (expected));
              ASSERT (result != NULL && memcmp (result, expected, strlen (expected)) == 0);
              if (o)
                {
                  for (i = 0; i < 10; i++)
                    ASSERT (offsets[i] == ((i % 2) == 0 ? (i / 2) * 3 : (size_t)(-1)));
                  ASSERT (offsets[10] == MAGIC);
                  free (offsets);
                }
              free (result);
            }
        }
      for (h = 0; h < SIZEOF (handlers); h++)
        {
          enum iconv_ilseq_handler handler = handlers[h];
          static const char input[] = "\202\261\202\361\202\311\202\277\202\315"; /* こんにちは in Shift_JIS */
          static const char expected[] = "\343\201\223\343\202\223\343\201\253\343\201\241\343\201\257"; /* こんにちは */
          for (o = 0; o < 2; o++)
            {
              size_t *offsets = (o ? new_offsets (strlen (input)) : NULL);
              char *result = NULL;
              size_t length = 0;
              int retval = mem_iconveha (input, strlen (input),
                                         "autodetect_jp", "UTF-8",
                                         false, handler,
                                         offsets,
                                         &result, &length);
              ASSERT (retval == 0);
              ASSERT (length == strlen (expected));
              ASSERT (result != NULL && memcmp (result, expected, strlen (expected)) == 0);
              if (o)
                {
                  for (i = 0; i < 10; i++)
                    ASSERT (offsets[i] == ((i % 2) == 0 ? (i / 2) * 3 : (size_t)(-1)));
                  ASSERT (offsets[10] == MAGIC);
                  free (offsets);
                }
              free (result);
            }
        }
      for (h = 0; h < SIZEOF (handlers); h++)
        {
          enum iconv_ilseq_handler handler = handlers[h];
          static const char input[] = "\033$B$3$s$K$A$O\033(B"; /* こんにちは in ISO-2022-JP-2 */
          static const char expected[] = "\343\201\223\343\202\223\343\201\253\343\201\241\343\201\257"; /* こんにちは */
          for (o = 0; o < 2; o++)
            {
              size_t *offsets = (o ? new_offsets (strlen (input)) : NULL);
              char *result = NULL;
              size_t length = 0;
              int retval = mem_iconveha (input, strlen (input),
                                         "autodetect_jp", "UTF-8",
                                         false, handler,
                                         offsets,
                                         &result, &length);
              ASSERT (retval == 0);
              ASSERT (length == strlen (expected));
              ASSERT (result != NULL && memcmp (result, expected, strlen (expected)) == 0);
              if (o)
                {
                  for (i = 0; i < 16; i++)
                    ASSERT (offsets[i] == (i == 0 ? 0 :
                                           i == 5 ? 3 :
                                           i == 7 ? 6 :
                                           i == 9 ? 9 :
                                           i == 11 ? 12 :
                                           i == 13 ? 15 :
                                           (size_t)(-1)));
                  ASSERT (offsets[16] == MAGIC);
                  free (offsets);
                }
              free (result);
            }
        }
    }
# endif

# if (((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2) || __GLIBC__ > 2) && !defined __UCLIBC__) || _LIBICONV_VERSION >= 0x0105
  /* Test conversion from UTF-8 to ISO-8859-1 with transliteration.  */
  for (h = 0; h < SIZEOF (handlers); h++)
    {
      enum iconv_ilseq_handler handler = handlers[h];
      static const char input[] = "Costs: 27 \342\202\254"; /* EURO SIGN */
      static const char expected[] = "Costs: 27 EUR";
      for (o = 0; o < 2; o++)
        {
          size_t *offsets = (o ? new_offsets (strlen (input)) : NULL);
          char *result = NULL;
          size_t length = 0;
          int retval = mem_iconveha (input, strlen (input),
                                     "UTF-8", "ISO-8859-1",
                                     true, handler,
                                     offsets,
                                     &result, &length);
          ASSERT (retval == 0);
          ASSERT (length == strlen (expected));
          ASSERT (result != NULL && memcmp (result, expected, strlen (expected)) == 0);
          if (o)
            {
              for (i = 0; i < 13; i++)
                ASSERT (offsets[i] == (i < 11 ? i : (size_t)(-1)));
              ASSERT (offsets[13] == MAGIC);
              free (offsets);
            }
          free (result);
        }
    }
# endif

  /* ------------------------- Test str_iconveha() ------------------------- */

  /* Test conversion from ISO-8859-2 to ISO-8859-1 with no errors.  */
  for (h = 0; h < SIZEOF (handlers); h++)
    {
      enum iconv_ilseq_handler handler = handlers[h];
      static const char input[] = "\304rger mit b\366sen B\374bchen ohne Augenma\337";
      static const char expected[] = "\304rger mit b\366sen B\374bchen ohne Augenma\337";
      char *result = str_iconveha (input, "ISO-8859-2", "ISO-8859-1", false, handler);
      ASSERT (result != NULL);
      ASSERT (strcmp (result, expected) == 0);
      free (result);
    }

  /* Test conversion from ISO-8859-2 to ISO-8859-1 with EILSEQ.  */
  for (h = 0; h < SIZEOF (handlers); h++)
    {
      enum iconv_ilseq_handler handler = handlers[h];
      static const char input[] = "Rafa\263 Maszkowski"; /* Rafał Maszkowski */
      char *result = str_iconveha (input, "ISO-8859-2", "ISO-8859-1", false, handler);
      switch (handler)
        {
        case iconveh_error:
          ASSERT (result == NULL && errno == EILSEQ);
          break;
        case iconveh_question_mark:
          {
            static const char expected[] = "Rafa? Maszkowski";
            ASSERT (result != NULL);
            ASSERT (strcmp (result, expected) == 0);
            free (result);
          }
          break;
        case iconveh_escape_sequence:
          {
            static const char expected[] = "Rafa\\u0142 Maszkowski";
            ASSERT (result != NULL);
            ASSERT (strcmp (result, expected) == 0);
            free (result);
          }
          break;
        }
    }

  /* Test conversion from ISO-8859-1 to UTF-8 with no errors.  */
  for (h = 0; h < SIZEOF (handlers); h++)
    {
      enum iconv_ilseq_handler handler = handlers[h];
      static const char input[] = "\304rger mit b\366sen B\374bchen ohne Augenma\337";
      static const char expected[] = "\303\204rger mit b\303\266sen B\303\274bchen ohne Augenma\303\237";
      char *result = str_iconveha (input, "ISO-8859-1", "UTF-8", false, handler);
      ASSERT (result != NULL);
      ASSERT (strcmp (result, expected) == 0);
      free (result);
    }

  /* Test conversion from UTF-8 to ISO-8859-1 with no errors.  */
  for (h = 0; h < SIZEOF (handlers); h++)
    {
      enum iconv_ilseq_handler handler = handlers[h];
      static const char input[] = "\303\204rger mit b\303\266sen B\303\274bchen ohne Augenma\303\237";
      static const char expected[] = "\304rger mit b\366sen B\374bchen ohne Augenma\337";
      char *result = str_iconveha (input, "UTF-8", "ISO-8859-1", false, handler);
      ASSERT (result != NULL);
      ASSERT (strcmp (result, expected) == 0);
      free (result);
    }

  /* Test conversion from UTF-8 to ISO-8859-1 with EILSEQ.  */
  for (h = 0; h < SIZEOF (handlers); h++)
    {
      enum iconv_ilseq_handler handler = handlers[h];
      static const char input[] = "Costs: 27 \342\202\254"; /* EURO SIGN */
      char *result = str_iconveha (input, "UTF-8", "ISO-8859-1", false, handler);
      switch (handler)
        {
        case iconveh_error:
          ASSERT (result == NULL && errno == EILSEQ);
          break;
        case iconveh_question_mark:
          {
            static const char expected[] = "Costs: 27 ?";
            ASSERT (result != NULL);
            ASSERT (strcmp (result, expected) == 0);
            free (result);
          }
          break;
        case iconveh_escape_sequence:
          {
            static const char expected[] = "Costs: 27 \\u20AC";
            ASSERT (result != NULL);
            ASSERT (strcmp (result, expected) == 0);
            free (result);
          }
          break;
        }
    }

  /* Test conversion from UTF-8 to ISO-8859-1 with EINVAL.  */
  for (h = 0; h < SIZEOF (handlers); h++)
    {
      enum iconv_ilseq_handler handler = handlers[h];
      static const char input[] = "\342";
      char *result = str_iconveha (input, "UTF-8", "ISO-8859-1", false, handler);
      ASSERT (result != NULL);
      ASSERT (strcmp (result, "") == 0);
      free (result);
    }

  /* autodetect_jp is only supported when iconv() support ISO-2022-JP-2.  */
# if defined _LIBICONV_VERSION || !(defined _AIX || defined __sgi || defined __hpux || defined __osf__ || defined __sun)
  if (iconv_supports_encoding ("ISO-2022-JP-2"))
    {
      /* Test conversions from autodetect_jp to UTF-8.  */
      for (h = 0; h < SIZEOF (handlers); h++)
        {
          enum iconv_ilseq_handler handler = handlers[h];
          static const char input[] = "\244\263\244\363\244\313\244\301\244\317"; /* こんにちは in EUC-JP */
          static const char expected[] = "\343\201\223\343\202\223\343\201\253\343\201\241\343\201\257"; /* こんにちは */
          char *result = str_iconveha (input, "autodetect_jp", "UTF-8", false, handler);
          ASSERT (result != NULL);
          ASSERT (strcmp (result, expected) == 0);
          free (result);
        }
      for (h = 0; h < SIZEOF (handlers); h++)
        {
          enum iconv_ilseq_handler handler = handlers[h];
          static const char input[] = "\202\261\202\361\202\311\202\277\202\315"; /* こんにちは in Shift_JIS */
          static const char expected[] = "\343\201\223\343\202\223\343\201\253\343\201\241\343\201\257"; /* こんにちは */
          char *result = str_iconveha (input, "autodetect_jp", "UTF-8", false, handler);
          ASSERT (result != NULL);
          ASSERT (strcmp (result, expected) == 0);
          free (result);
        }
      for (h = 0; h < SIZEOF (handlers); h++)
        {
          enum iconv_ilseq_handler handler = handlers[h];
          static const char input[] = "\033$B$3$s$K$A$O\033(B"; /* こんにちは in ISO-2022-JP-2 */
          static const char expected[] = "\343\201\223\343\202\223\343\201\253\343\201\241\343\201\257"; /* こんにちは */
          char *result = str_iconveha (input, "autodetect_jp", "UTF-8", false, handler);
          ASSERT (result != NULL);
          ASSERT (strcmp (result, expected) == 0);
          free (result);
        }
    }
# endif

# if (((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2) || __GLIBC__ > 2) && !defined __UCLIBC__) || _LIBICONV_VERSION >= 0x0105
  /* Test conversion from UTF-8 to ISO-8859-1 with transliteration.  */
  for (h = 0; h < SIZEOF (handlers); h++)
    {
      enum iconv_ilseq_handler handler = handlers[h];
      static const char input[] = "Costs: 27 \342\202\254"; /* EURO SIGN */
      static const char expected[] = "Costs: 27 EUR";
      char *result = str_iconveha (input, "UTF-8", "ISO-8859-1", true, handler);
      ASSERT (result != NULL);
      ASSERT (strcmp (result, expected) == 0);
      free (result);
    }
# endif

#endif

  return 0;
}