Logo Search packages:      
Sourcecode: glibc version File versions

euc-tw.c

/* Mapping tables for EUC-TW handling.
   Copyright (C) 1998, 1999, 2000-2002, 2003, 2007
   Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.

   The GNU C 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 2.1 of the License, or (at your option) any later version.

   The GNU C 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 GNU C Library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#include <dlfcn.h>
#include <stdint.h>
#include <cns11643l1.h>
#include <cns11643.h>

/* Definitions used in the body of the `gconv' function.  */
#define CHARSET_NAME          "EUC-TW//"
#define FROM_LOOP       from_euc_tw
#define TO_LOOP               to_euc_tw
#define DEFINE_INIT           1
#define DEFINE_FINI           1
#define MIN_NEEDED_FROM       1
#define MAX_NEEDED_FROM       4
#define MIN_NEEDED_TO         4


/* First define the conversion function from EUC-TW to UCS4.  */
#define MIN_NEEDED_INPUT      MIN_NEEDED_FROM
#define MAX_NEEDED_INPUT      MAX_NEEDED_FROM
#define MIN_NEEDED_OUTPUT     MIN_NEEDED_TO
#define LOOPFCT               FROM_LOOP
#define BODY \
  {                                                         \
    uint32_t ch = *inptr;                                         \
                                                            \
    if (ch <= 0x7f)                                               \
      /* Plain ASCII.  */                                         \
      ++inptr;                                                    \
    else if ((ch <= 0xa0 || ch > 0xfe) && ch != 0x8e)                   \
      {                                                           \
      /* This is illegal.  */                                     \
      STANDARD_FROM_LOOP_ERR_HANDLER (1);                         \
      }                                                           \
    else                                                    \
      {                                                           \
      /* Two or more byte character.  First test whether the next byte      \
         is also available.  */                                   \
      uint32_t ch2;                                               \
                                                            \
      if (inptr + 1 >= inend)                                     \
        {                                                   \
          /* The second byte is not available.  Store the intermediate      \
             result.  */                                          \
          result = __GCONV_INCOMPLETE_INPUT;                            \
          break;                                            \
        }                                                   \
                                                            \
      ch2 = *(inptr + 1);                                         \
                                                            \
      /* All second bytes of a multibyte character must be >= 0xa1. */      \
      if (ch2 < 0xa1 || ch2 == 0xff)                                    \
        STANDARD_FROM_LOOP_ERR_HANDLER (1);                             \
                                                            \
      if (ch == 0x8e)                                             \
        {                                                   \
          /* This is code set 2: CNS 11643, planes 1 to 16.  */         \
          const unsigned char *endp = inptr + 1;                        \
                                                            \
          ch = cns11643_to_ucs4 (&endp, inend - inptr - 1, 0x80);       \
                                                            \
          if (ch == 0)                                      \
            {                                                     \
            /* The third or fourth byte is not available.  Store        \
               the intermediate result.  */                             \
            result = __GCONV_INCOMPLETE_INPUT;                    \
            break;                                                \
            }                                                     \
                                                            \
          if (ch == __UNKNOWN_10646_CHAR)                         \
            /* Illegal input.  */                                 \
            STANDARD_FROM_LOOP_ERR_HANDLER (1);                   \
                                                            \
          inptr += 4;                                             \
        }                                                   \
      else                                                  \
        {                                                   \
          /* This is code set 1: CNS 11643, plane 1.  */                \
          const unsigned char *endp = inptr;                            \
                                                            \
          ch = cns11643l1_to_ucs4 (&endp, inend - inptr, 0x80);         \
          /* Please note that we need not test for the missing input          \
             characters here anymore.  */                         \
          if (ch == __UNKNOWN_10646_CHAR)                         \
            /* Illegal input.  */                                 \
            STANDARD_FROM_LOOP_ERR_HANDLER (2);                   \
                                                            \
          inptr += 2;                                             \
        }                                                   \
      }                                                           \
                                                            \
    put32 (outptr, ch);                                           \
    outptr += 4;                                            \
  }
#define LOOP_NEED_FLAGS
#define ONEBYTE_BODY \
  {                                                         \
    if (c < 0x80)                                           \
      return c;                                                   \
    else                                                    \
      return WEOF;                                                \
  }
#include <iconv/loop.c>


/* Next, define the other direction.  */
#define MIN_NEEDED_INPUT      MIN_NEEDED_TO
#define MIN_NEEDED_OUTPUT     MIN_NEEDED_FROM
#define MAX_NEEDED_OUTPUT     MAX_NEEDED_FROM
#define LOOPFCT               TO_LOOP
#define BODY \
  {                                                         \
    uint32_t ch = get32 (inptr);                                  \
                                                            \
    if (ch <= 0x7f)                                               \
      /* It's plain ASCII.  */                                          \
      *outptr++ = ch;                                             \
    else                                                    \
      {                                                           \
      /* Try the CNS 11643 planes.  */                            \
      size_t found;                                               \
                                                            \
      found = ucs4_to_cns11643l1 (ch, outptr, outend - outptr);         \
      if (__builtin_expect (found, 1) == 0)                             \
        {                                                   \
          /* We ran out of space.  */                                   \
          result = __GCONV_FULL_OUTPUT;                           \
          break;                                            \
        }                                                   \
      if (__builtin_expect (found, 1) != __UNKNOWN_10646_CHAR)          \
        {                                                   \
          /* It's a CNS 11643, plane 1 character, adjust it for EUC-TW.  */ \
          *outptr++ += 0x80;                                      \
          *outptr++ += 0x80;                                      \
        }                                                   \
      else                                                  \
        {                                                   \
          /* No CNS 11643, plane 1 character.  */                       \
                                                            \
          found = ucs4_to_cns11643 (ch, outptr + 1, outend - outptr - 1);   \
          if (__builtin_expect (found, 1) == 0)                   \
            {                                                     \
            /* We ran out of space.  */                           \
            result = __GCONV_FULL_OUTPUT;                         \
            break;                                                \
            }                                                     \
          if (__builtin_expect (found, 0) == __UNKNOWN_10646_CHAR)            \
            {                                                     \
            UNICODE_TAG_HANDLER (ch, 4);                          \
                                                            \
            /* Illegal character.  */                             \
            STANDARD_TO_LOOP_ERR_HANDLER (4);                     \
            }                                                     \
                                                            \
          /* It's a CNS 11643 character, adjust it for EUC-TW.  */            \
          *outptr++ = '\x8e';                                     \
          *outptr++ += 0xa0;                                      \
          *outptr++ += 0x80;                                      \
          *outptr++ += 0x80;                                      \
        }                                                   \
      }                                                           \
                                                            \
    inptr += 4;                                                   \
  }
#define LOOP_NEED_FLAGS
#include <iconv/loop.c>


/* Now define the toplevel functions.  */
#include <iconv/skeleton.c>

Generated by  Doxygen 1.6.0   Back to index