iconvdata/ibm943.c

   1 /* Conversion from and to IBM943.
   2    Copyright (C) 2000-2002 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, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 #include <dlfcn.h>
  22 #include <stdint.h>
  23 #include "ibm943.h"
  24
  25 #ifndef TRUE
  26 #define TRUE  1
  27 #define FALSE 0
  28 #endif
  29
  30 #define FROM    0
  31 #define TO      1
  32
  33 /* Definitions used in the body of the `gconv' function.  */
  34 #define CHARSET_NAME    "IBM943//"
  35 #define FROM_LOOP       from_ibm943
  36 #define TO_LOOP         to_ibm943
  37
  38 /* Definitions of initialization and destructor function.  */
  39 #define DEFINE_INIT     1
  40 #define DEFINE_FINI     1
  41
  42 #define MIN_NEEDED_FROM 1
  43 #define MAX_NEEDED_FROM 2
  44 #define MIN_NEEDED_TO   4
  45
  46 /* First, define the conversion function from IBM-943 to UCS4.  */
  47 #define MIN_NEEDED_INPUT        MIN_NEEDED_FROM
  48 #define MAX_NEEDED_INPUT        MAX_NEEDED_FROM
  49 #define MIN_NEEDED_OUTPUT       MIN_NEEDED_TO
  50 #define LOOPFCT                 FROM_LOOP
  51 #define BODY \
  52   {                                                                           \
  53     const struct gap *rp1 = __ibm943sb_to_ucs4_idx;                           \
  54     const struct gap *rp2 = __ibm943db_to_ucs4_idx;                           \
  55     uint32_t ch = *inptr;                                                     \
  56     uint32_t res;                                                             \
  57                                                                               \
  58     if (__builtin_expect (ch >= 0xffff, 0))                                   \
  59       {                                                                       \
  60         rp1 = NULL;                                                           \
  61         rp2 = NULL;                                                           \
  62       }                                                                       \
  63     else if (__builtin_expect (ch, 0) == 0x80                                 \
  64              || __builtin_expect (ch, 0) == 0xa0                              \
  65              || __builtin_expect (ch, 0) == 0xfd                              \
  66              || __builtin_expect (ch, 0) == 0xfe                              \
  67              || __builtin_expect (ch, 0) == 0xff)                             \
  68       {                                                                       \
  69         /* This is an illegal character.  */                                  \
  70         STANDARD_FROM_LOOP_ERR_HANDLER (1);                                   \
  71       }                                                                       \
  72     else                                                                      \
  73       {                                                                       \
  74         while (ch > rp1->end)                                                 \
  75           ++rp1;                                                              \
  76       }                                                                       \
  77                                                                               \
  78     /* Use the IBM943 table for single byte.  */                              \
  79     if (__builtin_expect (rp1 == NULL, 0)                                     \
  80         || __builtin_expect (ch < rp1->start, 0)                              \
  81         || (res = __ibm943sb_to_ucs4[ch + rp1->idx],                          \
  82         __builtin_expect (res, '\1') == 0 && ch != 0))                        \
  83       {                                                                       \
  84                                                                               \
  85         /* Use the IBM943 table for double byte.  */                          \
  86         if (__builtin_expect (inptr + 1 >= inend, 0))                         \
  87           {                                                                   \
  88             /* The second character is not available.                         \
  89                Store the intermediate result.  */                             \
  90             result = __GCONV_INCOMPLETE_INPUT;                                \
  91             break;                                                            \
  92           }                                                                   \
  93                                                                               \
  94         ch = (ch * 0x100) + inptr[1];                                         \
  95         while (ch > rp2->end)                                                 \
  96           ++rp2;                                                              \
  97                                                                               \
  98         if (__builtin_expect (rp2 == NULL, 0)                                 \
  99             || __builtin_expect (ch < rp2->start, 0)                          \
 100             || (res = __ibm943db_to_ucs4[ch + rp2->idx],                      \
 101             __builtin_expect (res, '\1') == 0 && ch !=0))                     \
 102           {                                                                   \
 103             /* This is an illegal character.  */                              \
 104             STANDARD_FROM_LOOP_ERR_HANDLER (2);                               \
 105           }                                                                   \
 106         else                                                                  \
 107           {                                                                   \
 108             put32 (outptr, res);                                              \
 109             outptr += 4;                                                      \
 110             inptr += 2;                                                       \
 111           }                                                                   \
 112       }                                                                       \
 113     else                                                                      \
 114       {                                                                       \
 115         if (res == 0x1c)                                                      \
 116           res = 0x1a;                                                         \
 117         else if (res == 0x7f)                                                 \
 118           res = 0x1c;                                                         \
 119         else if (res == 0xa5)                                                 \
 120           res = 0x5c;                                                         \
 121         else if (res == 0x203e)                                               \
 122           res = 0x7e;                                                         \
 123         else if (res == 0x1a)                                                 \
 124           res = 0x7f;                                                         \
 125         put32 (outptr, res);                                                  \
 126         outptr += 4;                                                          \
 127         inptr++;                                                              \
 128       }                                                                       \
 129   }
 130 #define LOOP_NEED_FLAGS
 131 #include <iconv/loop.c>
 132
 133 /* Next, define the other direction.  */
 134 #define MIN_NEEDED_INPUT        MIN_NEEDED_TO
 135 #define MIN_NEEDED_OUTPUT       MIN_NEEDED_FROM
 136 #define MAX_NEEDED_OUTPUT       MAX_NEEDED_FROM
 137 #define LOOPFCT                 TO_LOOP
 138 #define BODY \
 139   {                                                                           \
 140     const struct gap *rp = __ucs4_to_ibm943sb_idx;                            \
 141     unsigned char sc;                                                         \
 142     uint32_t ch = get32(inptr);                                               \
 143     uint16_t found = TRUE;                                                    \
 144     uint32_t i;                                                               \
 145     uint32_t low;                                                             \
 146     uint32_t high;                                                            \
 147     uint16_t pccode;                                                          \
 148                                                                               \
 149     if (__builtin_expect (ch >= 0xffff, 0))                                   \
 150       {                                                                       \
 151         UNICODE_TAG_HANDLER (ch, 4);                                          \
 152         rp = NULL;                                                            \
 153       }                                                                       \
 154     else                                                                      \
 155       while (ch > rp->end)                                                    \
 156         ++rp;                                                                 \
 157                                                                               \
 158     /* Use the UCS4 table for single byte.  */                                \
 159     if (__builtin_expect (rp == NULL, 0)                                      \
 160         || __builtin_expect (ch < rp->start, 0)                               \
 161         || (sc = __ucs4_to_ibm943sb[ch + rp->idx],                            \
 162         __builtin_expect (sc, '\1') == '\0' && ch != L'\0'))                  \
 163       {                                                                       \
 164                                                                               \
 165         /* Use the UCS4 table for double byte.  */                            \
 166         found = FALSE;                                                        \
 167         low = 0;                                                              \
 168         high = (sizeof (__ucs4_to_ibm943db) >> 1)                             \
 169                 / sizeof (__ucs4_to_ibm943db[0][FROM]);                       \
 170         pccode = ch;                                                          \
 171         while (low <= high)                                                   \
 172           {                                                                   \
 173             i = (low + high) >> 1;                                            \
 174             if (pccode < __ucs4_to_ibm943db[i][FROM])                         \
 175               high = i - 1;                                                   \
 176             else if (pccode > __ucs4_to_ibm943db[i][FROM])                    \
 177               low = i + 1;                                                    \
 178             else                                                              \
 179               {                                                               \
 180                 pccode = __ucs4_to_ibm943db[i][TO];                           \
 181                 found = TRUE;                                                 \
 182                 break;                                                        \
 183               }                                                               \
 184           }                                                                   \
 185         if (found)                                                            \
 186           {                                                                   \
 187             if (__builtin_expect (outptr + 2 > outend, 0))                    \
 188               {                                                               \
 189                 result = __GCONV_FULL_OUTPUT;                                 \
 190                 break;                                                        \
 191               }                                                               \
 192             *outptr++ = pccode >> 8 & 0xff;                                   \
 193             *outptr++ = pccode & 0xff;                                        \
 194           }                                                                   \
 195         else                                                                  \
 196           {                                                                   \
 197             /* This is an illegal character.  */                              \
 198             STANDARD_TO_LOOP_ERR_HANDLER (4);                                 \
 199           }                                                                   \
 200       }                                                                       \
 201     else                                                                      \
 202       {                                                                       \
 203         if (__builtin_expect (outptr + 1 > outend, 0))                        \
 204           {                                                                   \
 205             result = __GCONV_FULL_OUTPUT;                                     \
 206             break;                                                            \
 207           }                                                                   \
 208         if (ch == 0x5c)                                                       \
 209           *outptr++ = 0x5c;                                                   \
 210         else if (ch == 0x7e)                                                  \
 211           *outptr++ = 0x7e;                                                   \
 212         else                                                                  \
 213           *outptr++ = sc;                                                     \
 214       }                                                                       \
 215                                                                               \
 216     /* Now that we wrote the output increment the input pointer.  */          \
 217     inptr += 4;                                                               \
 218   }
 219 #define LOOP_NEED_FLAGS
 220 #include <iconv/loop.c>
 221
 222 /* Now define the toplevel functions.  */
 223 #include <iconv/skeleton.c>