iconvdata/euccn.c

   1 /* Mapping tables for EUC-CN handling.
   2    Copyright (C) 1998 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Library General Public License as
   8    published by the Free Software Foundation; either version 2 of the
   9    License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Library General Public License for more details.
  15
  16    You should have received a copy of the GNU Library General Public
  17    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  18    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19    Boston, MA 02111-1307, USA.  */
  20
  21 #include <gb2312.h>
  22 #include <stdint.h>
  23
  24 /* Definitions used in the body of the `gconv' function.  */
  25 #define CHARSET_NAME            "EUC-CN//"
  26 #define FROM_LOOP               from_euc_cn
  27 #define TO_LOOP                 to_euc_cn
  28 #define DEFINE_INIT             1
  29 #define DEFINE_FINI             1
  30 #define MIN_NEEDED_FROM         1
  31 #define MAX_NEEDED_FROM         2
  32 #define MIN_NEEDED_TO           4
  33
  34
  35 /* First define the conversion function from ISO 8859-1 to UCS4.  */
  36 #define MIN_NEEDED_INPUT        MIN_NEEDED_FROM
  37 #define MAX_NEEDED_INPUT        MAX_NEEDED_FROM
  38 #define MIN_NEEDED_OUTPUT       MIN_NEEDED_TO
  39 #define LOOPFCT                 FROM_LOOP
  40 #define BODY \
  41   {                                                                           \
  42     uint32_t ch = *inptr;                                                     \
  43                                                                               \
  44     if (ch <= 0x7f)                                                           \
  45       ++inptr;                                                                \
  46     else                                                                      \
  47       if ((ch <= 0xa0 || ch > 0xfe) && ch != 0x8e && ch != 0x8f)              \
  48         {                                                                     \
  49           /* This is illegal.  */                                             \
  50           result = GCONV_ILLEGAL_INPUT;                                       \
  51           break;                                                              \
  52         }                                                                     \
  53       else                                                                    \
  54         {                                                                     \
  55           /* Two or more byte character.  First test whether the              \
  56              next character is also available.  */                            \
  57           const unsigned char *endp;                                          \
  58                                                                               \
  59           if (NEED_LENGTH_TEST && inptr + 1 >= inend)                         \
  60             {                                                                 \
  61               /* The second character is not available.  Store                \
  62                  the intermediate result.  */                                 \
  63               result = GCONV_INCOMPLETE_INPUT;                                \
  64               break;                                                          \
  65             }                                                                 \
  66                                                                               \
  67           ch = inptr[1];                                                      \
  68                                                                               \
  69           /* All second bytes of a multibyte character must be >= 0xa1. */    \
  70           if (ch < 0xa1)                                                      \
  71             {                                                                 \
  72               /* This is an illegal character.  */                            \
  73               result = GCONV_ILLEGAL_INPUT;                                   \
  74               break;                                                          \
  75             }                                                                 \
  76                                                                               \
  77           /* This is code set 1: GB 2312-80.  */                              \
  78           endp = inptr;                                                       \
  79                                                                               \
  80           ch = gb2312_to_ucs4 (&endp, 2, 0x80);                               \
  81           if (ch == UNKNOWN_10646_CHAR)                                       \
  82             {                                                                 \
  83               /* This is an illegal character.  */                            \
  84               result = GCONV_ILLEGAL_INPUT;                                   \
  85               break;                                                          \
  86             }                                                                 \
  87                                                                               \
  88           inptr += 2;                                                         \
  89         }                                                                     \
  90                                                                               \
  91     *((uint32_t *) outptr)++ = ch;                                            \
  92   }
  93 #include <iconv/loop.c>
  94
  95
  96 /* Next, define the other direction.  */
  97 #define MIN_NEEDED_INPUT        MIN_NEEDED_TO
  98 #define MIN_NEEDED_OUTPUT       MIN_NEEDED_FROM
  99 #define MAX_NEEDED_OUTPUT       MAX_NEEDED_FROM
 100 #define LOOPFCT                 TO_LOOP
 101 #define BODY \
 102   {                                                                           \
 103     uint32_t ch = *((uint32_t *) inptr);                                      \
 104                                                                               \
 105     if (ch <= L'\x7f')                                                        \
 106       /* It's plain ASCII.  */                                                \
 107       *outptr++ = (unsigned char) ch;                                         \
 108     else                                                                      \
 109       {                                                                       \
 110         size_t found;                                                         \
 111                                                                               \
 112         found = ucs4_to_gb2312 (ch, outptr,                                   \
 113                                 (NEED_LENGTH_TEST                             \
 114                                  ? outend - outptr : MAX_NEEDED_OUTPUT));     \
 115         if (!NEED_LENGTH_TEST || found != 0)                                  \
 116           {                                                                   \
 117             if (found == UNKNOWN_10646_CHAR)                                  \
 118               {                                                               \
 119                 /* Illegal character.  */                                     \
 120                 result = GCONV_ILLEGAL_INPUT;                                 \
 121                 break;                                                        \
 122               }                                                               \
 123                                                                               \
 124             /* It's a GB 2312 character, adjust it for EUC-CN.  */            \
 125             *outptr++ += 0x80;                                                \
 126             *outptr++ += 0x80;                                                \
 127           }                                                                   \
 128         else                                                                  \
 129           {                                                                   \
 130             /* We ran out of space.  */                                       \
 131             result = GCONV_FULL_OUTPUT;                                       \
 132             break;                                                            \
 133           }                                                                   \
 134       }                                                                       \
 135     inptr += 4;                                                               \
 136   }
 137 #include <iconv/loop.c>
 138
 139
 140 /* Now define the toplevel functions.  */
 141 #include <iconv/skeleton.c>