iconvdata/euckr.c

   1 /* Mapping tables for EUC-KR handling.
   2    Copyright (C) 1998 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Jungshik Shin <jshin@pantheon.yale.edu>
   5    and Ulrich Drepper <drepper@cygnus.com>, 1998.
   6
   7    The GNU C Library is free software; you can redistribute it and/or
   8    modify it under the terms of the GNU Library General Public License as
   9    published by the Free Software Foundation; either version 2 of the
  10    License, or (at your option) any later version.
  11
  12    The GNU C Library is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15    Library General Public License for more details.
  16
  17    You should have received a copy of the GNU Library General Public
  18    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  19    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  20    Boston, MA 02111-1307, USA.  */
  21
  22 #include <stdint.h>
  23 #include <ksc5601.h>
  24
  25
  26 static inline void
  27 euckr_from_ucs4 (uint32_t ch, unsigned char *cp)
  28 {
  29   if (ch > 0x7f)
  30     {
  31       if (ucs4_to_ksc5601 (ch, cp, 2) != UNKNOWN_10646_CHAR)
  32         {
  33           cp[0] |= 0x80;
  34           cp[1] |= 0x80;
  35         }
  36     }
  37   /* XXX Think about 0x5c ; '\'.  */
  38   else
  39     {
  40       cp[0] = (unsigned char) ch;
  41       cp[1] = '\0';
  42     }
  43 }
  44
  45
  46 /* Definitions used in the body of the `gconv' function.  */
  47 #define CHARSET_NAME            "EUC-KR//"
  48 #define FROM_LOOP               from_euc_kr
  49 #define TO_LOOP                 to_euc_kr
  50 #define DEFINE_INIT             1
  51 #define DEFINE_FINI             1
  52 #define MIN_NEEDED_FROM         1
  53 #define MAX_NEEDED_FROM         2
  54 #define MIN_NEEDED_TO           4
  55
  56
  57 /* First define the conversion function from EUC-KR to UCS4.  */
  58 #define MIN_NEEDED_INPUT        MIN_NEEDED_FROM
  59 #define MAX_NEEDED_INPUT        MAX_NEEDED_FROM
  60 #define MIN_NEEDED_OUTPUT       MIN_NEEDED_TO
  61 #define LOOPFCT                 FROM_LOOP
  62 #define BODY \
  63   {                                                                           \
  64     uint32_t ch = *inptr;                                                     \
  65                                                                               \
  66     /* Half-width Korean Currency WON sign                                    \
  67                                                                               \
  68        if (inchar == 0x5c)                                                    \
  69          ch =  0x20a9;                                                        \
  70        else if (inchar <= 0x7f)                                               \
  71          ch = (uint32_t) inchar;                                              \
  72     */                                                                        \
  73                                                                               \
  74     if (ch <= 0x7f)                                                           \
  75       /* Plain ASCII.  */                                                     \
  76       ++inptr;                                                                \
  77     /* 0xfe(->0x7e : row 94) and 0xc9(->0x59 : row 41) are                    \
  78        user-defined areas.  */                                                \
  79     else if (ch <= 0xa0 || ch > 0xfe || ch == 0xc9)                           \
  80       {                                                                       \
  81         /* This is illegal.  */                                               \
  82         result = GCONV_ILLEGAL_INPUT;                                         \
  83         break;                                                                \
  84       }                                                                       \
  85     else                                                                      \
  86       {                                                                       \
  87         /* Two-byte character.  First test whether the next character         \
  88            is also available.  */                                             \
  89         ch = ksc5601_to_ucs4 (&inptr,                                         \
  90                               NEED_LENGTH_TEST ? inptr - inend : 2, 0x80);    \
  91         if (NEED_LENGTH_TEST && ch == 0)                                      \
  92           {                                                                   \
  93             /* The second character is not available.  */                     \
  94             result = GCONV_INCOMPLETE_INPUT;                                  \
  95             break;                                                            \
  96           }                                                                   \
  97         if (ch == UNKNOWN_10646_CHAR)                                         \
  98           {                                                                   \
  99             /* This is an illegal character.  */                              \
 100             result = GCONV_ILLEGAL_INPUT;                                     \
 101             break;                                                            \
 102           }                                                                   \
 103       }                                                                       \
 104                                                                               \
 105     *((uint32_t *) outptr)++ = ch;                                            \
 106   }
 107 #include <iconv/loop.c>
 108
 109
 110 /* Next, define the other direction.  */
 111 #define MIN_NEEDED_INPUT        MIN_NEEDED_TO
 112 #define MIN_NEEDED_OUTPUT       MIN_NEEDED_FROM
 113 #define MAX_NEEDED_OUTPUT       MAX_NEEDED_FROM
 114 #define LOOPFCT                 TO_LOOP
 115 #define BODY \
 116   {                                                                           \
 117     uint32_t ch = *((uint32_t *) inptr);                                      \
 118     unsigned char cp[2];                                                      \
 119                                                                               \
 120     /* Decomposing Hangul syllables not available in KS C 5601 into           \
 121        Jamos should be considered either here or in euckr_from_ucs4() */      \
 122     euckr_from_ucs4 (ch, cp) ;                                                \
 123                                                                               \
 124     if (cp[0] == '\0' && ch != 0)                                             \
 125       {                                                                       \
 126         /* Illegal character.  */                                             \
 127         result = GCONV_ILLEGAL_INPUT;                                         \
 128         break;                                                                \
 129       }                                                                       \
 130                                                                               \
 131     *outptr++ = cp[0];                                                        \
 132     /* Now test for a possible second byte and write this if possible.  */    \
 133     if (cp[1] != '\0')                                                        \
 134       {                                                                       \
 135         if (NEED_LENGTH_TEST && outptr >= outend)                             \
 136           {                                                                   \
 137             /* The result does not fit into the buffer.  */                   \
 138             --outptr;                                                         \
 139             result = GCONV_FULL_OUTPUT;                                       \
 140             break;                                                            \
 141           }                                                                   \
 142         *outptr++ = cp[1];                                                    \
 143       }                                                                       \
 144                                                                               \
 145     inptr += 4;                                                               \
 146   }
 147 #include <iconv/loop.c>
 148
 149
 150 /* Now define the toplevel functions.  */
 151 #include <iconv/skeleton.c>