iconvdata/ibm932.c

   1 /* Conversion from and to IBM932.
   2    Copyright (C) 2000-2002, 2004 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Masahide Washizawa <washi@jp.ibm.com>, 2000.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the 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    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #include <dlfcn.h>
  21 #include <stdint.h>
  22 #include <stdbool.h>
  23 #include "ibm932.h"
  24
  25 #define FROM    0
  26 #define TO      1
  27
  28 /* Definitions used in the body of the `gconv' function.  */
  29 #define CHARSET_NAME    "IBM932//"
  30 #define FROM_LOOP       from_ibm932
  31 #define TO_LOOP         to_ibm932
  32
  33 /* Definitions of initialization and destructor function.  */
  34 #define DEFINE_INIT     1
  35 #define DEFINE_FINI     1
  36
  37 #define MIN_NEEDED_FROM 1
  38 #define MAX_NEEDED_FROM 2
  39 #define MIN_NEEDED_TO   4
  40
  41 /* First, define the conversion function from IBM-932 to UCS4.  */
  42 #define MIN_NEEDED_INPUT        MIN_NEEDED_FROM
  43 #define MAX_NEEDED_INPUT        MAX_NEEDED_FROM
  44 #define MIN_NEEDED_OUTPUT       MIN_NEEDED_TO
  45 #define LOOPFCT                 FROM_LOOP
  46 #define BODY \
  47   {                                                                           \
  48     const struct gap *rp2 = __ibm932db_to_ucs4_idx;                           \
  49     uint32_t ch = *inptr;                                                     \
  50     uint32_t res;                                                             \
  51                                                                               \
  52     if (__builtin_expect (ch == 0x80, 0)                                      \
  53         || __builtin_expect (ch == 0xa0, 0)                                   \
  54         || __builtin_expect (ch == 0xfd, 0)                                   \
  55         || __builtin_expect (ch == 0xfe, 0)                                   \
  56         || __builtin_expect (ch == 0xff, 0))                                  \
  57       {                                                                       \
  58         /* This is an illegal character.  */                                  \
  59         STANDARD_FROM_LOOP_ERR_HANDLER (1);                                   \
  60       }                                                                       \
  61                                                                               \
  62     /* Use the IBM932 table for single byte.  */                              \
  63     res = __ibm932sb_to_ucs4[ch];                                             \
  64     if (__builtin_expect (res == 0, 0) && ch != 0)                            \
  65       {                                                                       \
  66         /* Use the IBM932 table for double byte.  */                          \
  67         if (__builtin_expect (inptr + 1 >= inend, 0))                         \
  68           {                                                                   \
  69             /* The second character is not available.                         \
  70                Store the intermediate result.  */                             \
  71             result = __GCONV_INCOMPLETE_INPUT;                                \
  72             break;                                                            \
  73           }                                                                   \
  74                                                                               \
  75         ch = (ch * 0x100) + inptr[1];                                         \
  76         while (ch > rp2->end)                                                 \
  77           ++rp2;                                                              \
  78                                                                               \
  79         if (__builtin_expect (rp2 == NULL, 0)                                 \
  80             || __builtin_expect (ch < rp2->start, 0)                          \
  81             || (res = __ibm932db_to_ucs4[ch + rp2->idx],                      \
  82             __builtin_expect (res, '\1') == 0 && ch !=0))                     \
  83           {                                                                   \
  84             /* This is an illegal character.  */                              \
  85             STANDARD_FROM_LOOP_ERR_HANDLER (2);                               \
  86           }                                                                   \
  87         else                                                                  \
  88           {                                                                   \
  89             put32 (outptr, res);                                              \
  90             outptr += 4;                                                      \
  91             inptr += 2;                                                       \
  92           }                                                                   \
  93       }                                                                       \
  94     else                                                                      \
  95       {                                                                       \
  96         if (res == 0xa5)                                                      \
  97           res = 0x5c;                                                         \
  98         else if (res == 0x203e)                                               \
  99           res = 0x7e;                                                         \
 100         put32 (outptr, res);                                                  \
 101         outptr += 4;                                                          \
 102         inptr++;                                                              \
 103       }                                                                       \
 104   }
 105 #define LOOP_NEED_FLAGS
 106 #define ONEBYTE_BODY \
 107   {                                                                           \
 108     if (c == 0x80 || c == 0xa0 || c >= 0xfd)                                  \
 109       return WEOF;                                                            \
 110     uint32_t res = __ibm932sb_to_ucs4[c];                                     \
 111     if (res == 0 && c != 0)                                                   \
 112       return WEOF;                                                            \
 113     if (res == 0xa5)                                                          \
 114       res = 0x5c;                                                             \
 115     else if (res == 0x203e)                                                   \
 116       res = 0x7e;                                                             \
 117     return res;                                                               \
 118   }
 119 #include <iconv/loop.c>
 120
 121 /* Next, define the other direction.  */
 122 #define MIN_NEEDED_INPUT        MIN_NEEDED_TO
 123 #define MIN_NEEDED_OUTPUT       MIN_NEEDED_FROM
 124 #define MAX_NEEDED_OUTPUT       MAX_NEEDED_FROM
 125 #define LOOPFCT                 TO_LOOP
 126 #define BODY \
 127   {                                                                           \
 128     const struct gap *rp = __ucs4_to_ibm932sb_idx;                            \
 129     unsigned char sc;                                                         \
 130     uint32_t ch = get32 (inptr);                                              \
 131     bool found = true;                                                        \
 132     uint32_t i;                                                               \
 133     uint32_t low;                                                             \
 134     uint32_t high;                                                            \
 135     uint16_t pccode;                                                          \
 136                                                                               \
 137     if (__builtin_expect (ch >= 0xffff, 0))                                   \
 138       {                                                                       \
 139         UNICODE_TAG_HANDLER (ch, 4);                                          \
 140         rp = NULL;                                                            \
 141       }                                                                       \
 142     else                                                                      \
 143       while (ch > rp->end)                                                    \
 144         ++rp;                                                                 \
 145                                                                               \
 146     /* Use the UCS4 table for single byte.  */                                \
 147     if (__builtin_expect (rp == NULL, 0)                                      \
 148         || __builtin_expect (ch < rp->start, 0)                               \
 149         || (sc = __ucs4_to_ibm932sb[ch + rp->idx],                            \
 150         __builtin_expect (sc, '\1') == '\0' && ch != L'\0'))                  \
 151       {                                                                       \
 152                                                                               \
 153         /* Use the UCS4 table for double byte.  */                            \
 154         found = false;                                                        \
 155         low = 0;                                                              \
 156         high = (sizeof (__ucs4_to_ibm932db) >> 1)                             \
 157                 / sizeof (__ucs4_to_ibm932db[0][FROM]);                       \
 158         pccode = ch;                                                          \
 159         if (__builtin_expect (rp != NULL, 1))                                 \
 160           while (low < high)                                                  \
 161             {                                                                 \
 162               i = (low + high) >> 1;                                          \
 163               if (pccode < __ucs4_to_ibm932db[i][FROM])                       \
 164                 high = i;                                                     \
 165               else if (pccode > __ucs4_to_ibm932db[i][FROM])                  \
 166                 low = i + 1;                                                  \
 167               else                                                            \
 168                 {                                                             \
 169                   pccode = __ucs4_to_ibm932db[i][TO];                         \
 170                   found = true;                                               \
 171                   break;                                                      \
 172                 }                                                             \
 173             }                                                                 \
 174         if (found)                                                            \
 175           {                                                                   \
 176             if (__builtin_expect (outptr + 2 > outend, 0))                    \
 177               {                                                               \
 178                 result = __GCONV_FULL_OUTPUT;                                 \
 179                 break;                                                        \
 180               }                                                               \
 181             *outptr++ = pccode >> 8 & 0xff;                                   \
 182             *outptr++ = pccode & 0xff;                                        \
 183           }                                                                   \
 184         else                                                                  \
 185           {                                                                   \
 186             /* This is an illegal character.  */                              \
 187             STANDARD_TO_LOOP_ERR_HANDLER (4);                                 \
 188           }                                                                   \
 189       }                                                                       \
 190     else                                                                      \
 191       {                                                                       \
 192         if (__builtin_expect (outptr + 1 > outend, 0))                        \
 193           {                                                                   \
 194             result = __GCONV_FULL_OUTPUT;                                     \
 195             break;                                                            \
 196           }                                                                   \
 197         if (ch == 0x5c)                                                       \
 198           *outptr++ = 0x5c;                                                   \
 199         else if (ch == 0x7e)                                                  \
 200           *outptr++ = 0x7e;                                                   \
 201         else                                                                  \
 202           *outptr++ = sc;                                                     \
 203       }                                                                       \
 204                                                                               \
 205     /* Now that we wrote the output increment the input pointer.  */          \
 206     inptr += 4;                                                               \
 207   }
 208 #define LOOP_NEED_FLAGS
 209 #include <iconv/loop.c>
 210
 211 /* Now define the toplevel functions.  */
 212 #include <iconv/skeleton.c>