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euc-kr.c

/* Mapping tables for EUC-KR handling.
   Copyright (C) 1998, 1999, 2000-2002 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Jungshik Shin <jshin@pantheon.yale.edu>
   and 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 <ksc5601.h>


static inline void
euckr_from_ucs4 (uint32_t ch, unsigned char *cp)
{
  if (ch > 0x9f)
    {
      if (__builtin_expect (ch, 0) == 0x20a9)
      {
        /* Half-width Korean Currency WON sign.  There is no
             equivalent in EUC-KR.  Some mappings use \x5c because
             this is what some old Korean ASCII variants used but this
             is causing problems.  We map it to the FULL WIDTH WON SIGN.  */
        cp[0] = '\xa3';
        cp[1] = '\xdc';
      }
      else if (__builtin_expect (ucs4_to_ksc5601 (ch, cp, 2), 0)
        != __UNKNOWN_10646_CHAR)
      {
        cp[0] |= 0x80;
        cp[1] |= 0x80;
      }
      else
      cp[0] = '\0';
    }
  else
    {
      /* There is no mapping for U005c but we nevertheless map it to
       \x5c.  */
      cp[0] = (unsigned char) ch;
      cp[1] = '\0';
    }
}


/* Definitions used in the body of the `gconv' function.  */
#define CHARSET_NAME          "EUC-KR//"
#define FROM_LOOP       from_euc_kr
#define TO_LOOP               to_euc_kr
#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-KR 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 <= 0x9f)                                               \
      ++inptr;                                                    \
    /* 0xfe(->0x7e : row 94) and 0xc9(->0x59 : row 41) are              \
       user-defined areas.  */                                          \
    else if (__builtin_expect (ch == 0xa0, 0)                           \
           || __builtin_expect (ch > 0xfe, 0)                           \
           || __builtin_expect (ch == 0xc9, 0))                   \
      {                                                           \
      /* This is illegal.  */                                     \
      STANDARD_FROM_LOOP_ERR_HANDLER (1);                         \
      }                                                           \
    else                                                    \
      {                                                           \
      /* Two-byte character.  First test whether the next byte          \
         is also available.  */                                   \
      ch = ksc5601_to_ucs4 (&inptr, inend - inptr, 0x80);               \
      if (__builtin_expect (ch == 0, 0))                          \
        {                                                   \
          /* The second byte is not available.  */                      \
          result = __GCONV_INCOMPLETE_INPUT;                            \
          break;                                            \
        }                                                   \
      if (__builtin_expect (ch == __UNKNOWN_10646_CHAR, 0))             \
        /* This is an illegal character.  */                            \
        STANDARD_FROM_LOOP_ERR_HANDLER (2);                             \
      }                                                           \
                                                            \
    put32 (outptr, ch);                                           \
    outptr += 4;                                            \
  }
#define LOOP_NEED_FLAGS
#define ONEBYTE_BODY \
  {                                                         \
    if (c <= 0x9f)                                                \
      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);                                  \
    unsigned char cp[2];                                          \
                                                            \
    /* Decomposing Hangul syllables not available in KS C 5601 into           \
       Jamos should be considered either here or in euckr_from_ucs4() */      \
    euckr_from_ucs4 (ch, cp);                                     \
                                                            \
    if (__builtin_expect (cp[0], '\1') == '\0' && ch != 0)              \
      {                                                           \
      UNICODE_TAG_HANDLER (ch, 4);                                \
                                                            \
      /* Illegal character.  */                                   \
      STANDARD_TO_LOOP_ERR_HANDLER (4);                           \
      }                                                           \
                                                            \
    *outptr++ = cp[0];                                            \
    /* Now test for a possible second byte and write this if possible.  */    \
    if (cp[1] != '\0')                                            \
      {                                                           \
      if (__builtin_expect (outptr >= outend, 0))                       \
        {                                                   \
          /* The result does not fit into the buffer.  */               \
          --outptr;                                               \
          result = __GCONV_FULL_OUTPUT;                           \
          break;                                            \
        }                                                   \
      *outptr++ = cp[1];                                          \
      }                                                           \
                                                            \
    inptr += 4;                                                   \
  }
#define LOOP_NEED_FLAGS
#include <iconv/loop.c>


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

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