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euc-cn.c

/* Mapping tables for EUC-CN handling.
   Copyright (C) 1998, 1999, 2000-2002 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 <gb2312.h>
#include <stdint.h>

/* Definitions used in the body of the `gconv' function.  */
#define CHARSET_NAME          "EUC-CN//"
#define FROM_LOOP       from_euc_cn
#define TO_LOOP               to_euc_cn
#define DEFINE_INIT           1
#define DEFINE_FINI           1
#define MIN_NEEDED_FROM       1
#define MAX_NEEDED_FROM       2
#define MIN_NEEDED_TO         4


/* First define the conversion function from EUC-CN 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)                                               \
      ++inptr;                                                    \
    else                                                    \
      if ((__builtin_expect (ch <= 0xa0, 0) && ch != 0x8e && ch != 0x8f)      \
        || __builtin_expect (ch > 0xfe, 0))                             \
      {                                                     \
        /* This is illegal.  */                                   \
        STANDARD_FROM_LOOP_ERR_HANDLER (1);                             \
      }                                                     \
      else                                                  \
      {                                                     \
        /* Two or more byte character.  First test whether the          \
           next byte is also available.  */                             \
        const unsigned char *endp;                                \
                                                            \
        if (__builtin_expect (inptr + 1 >= inend, 0))                   \
          {                                                 \
            /* The second character is not available.  Store                  \
             the intermediate result.  */                         \
            result = __GCONV_INCOMPLETE_INPUT;                    \
            break;                                                \
          }                                                 \
                                                            \
        ch = inptr[1];                                      \
                                                            \
        /* All second bytes of a multibyte character must be >= 0xa1. */    \
        if (__builtin_expect (ch < 0xa1, 0))                            \
          STANDARD_FROM_LOOP_ERR_HANDLER (1);                           \
                                                            \
        /* This is code set 1: GB 2312-80.  */                    \
        endp = inptr;                                             \
                                                            \
        ch = gb2312_to_ucs4 (&endp, 2, 0x80);                           \
        if (__builtin_expect (ch == __UNKNOWN_10646_CHAR, 0))                 \
          {                                                 \
            /* This is an illegal character.  */                        \
            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 <= L'\x7f')                                            \
      /* It's plain ASCII.  */                                          \
      *outptr++ = (unsigned char) ch;                                   \
    else                                                    \
      {                                                           \
      size_t found;                                               \
                                                            \
      found = ucs4_to_gb2312 (ch, outptr, outend - outptr);             \
      if (__builtin_expect (found, 1) != 0)                             \
        {                                                   \
          if (__builtin_expect (found, 0) == __UNKNOWN_10646_CHAR)            \
            {                                                     \
            UNICODE_TAG_HANDLER (ch, 4);                          \
                                                            \
            /* Illegal character.  */                             \
            STANDARD_TO_LOOP_ERR_HANDLER (4);                     \
            }                                                     \
                                                            \
          /* It's a GB 2312 character, adjust it for EUC-CN.  */        \
          *outptr++ += 0x80;                                      \
          *outptr++ += 0x80;                                      \
        }                                                   \
      else                                                  \
        {                                                   \
          /* We ran out of space.  */                                   \
          result = __GCONV_FULL_OUTPUT;                           \
          break;                                            \
        }                                                   \
      }                                                           \
    inptr += 4;                                                   \
  }
#define LOOP_NEED_FLAGS
#include <iconv/loop.c>


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

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