iconvdata/ibm1364.c

   1 /* Conversion from and to IBM1364.
   2    Copyright (C) 2005, 2008 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Masahide Washizawa <washi@jp.ibm.com>, 2005.
   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 <wchar.h>
  24 #include <byteswap.h>
  25
  26 #ifndef CHARSET_NAME
  27 /* This is really the IBM1364 converter, not another module sharing
  28    the code.  */
  29 # define DATA_HEADER    "ibm1364.h"
  30 # define CHARSET_NAME   "IBM1364//"
  31 # define FROM_LOOP      from_ibm1364
  32 # define TO_LOOP        to_ibm1364
  33 # define SB_TO_UCS4     __ibm1364sb_to_ucs4
  34 # define DB_TO_UCS4_IDX __ibm1364db_to_ucs4_idx
  35 # define DB_TO_UCS4     __ibm1364db_to_ucs4
  36 # define UCS4_TO_SB_IDX __ucs4_to_ibm1364sb_idx
  37 # define UCS4_TO_SB     __ucs4_to_ibm1364sb
  38 # define UCS4_TO_DB_IDX __ucs4_to_ibm1364db_idx
  39 # define UCS4_TO_DB     __ucs4_to_ibm1364db
  40 # define UCS_LIMIT      0xffff
  41 #endif
  42
  43
  44 #include DATA_HEADER
  45
  46 /* The shift sequences for this charset (it does not use ESC).  */
  47 #define SI              0x0F  /* Shift In, host code to turn DBCS off.  */
  48 #define SO              0x0E  /* Shift Out, host code to turn DBCS on.  */
  49
  50 /* Definitions used in the body of the `gconv' function.  */
  51 #define MIN_NEEDED_FROM 1
  52 #define MAX_NEEDED_FROM 2
  53 #define MIN_NEEDED_TO   4
  54 #ifdef HAS_COMBINED
  55 # define MAX_NEEDED_TO  8
  56 #else
  57 # define MAX_NEEDED_TO  4
  58 #endif
  59 #define PREPARE_LOOP \
  60   int save_curcs;                                                             \
  61   int *curcsp = &data->__statep->__count;
  62 #define EXTRA_LOOP_ARGS         , curcsp
  63
  64 /* Definitions of initialization and destructor function.  */
  65 #define DEFINE_INIT     1
  66 #define DEFINE_FINI     1
  67
  68
  69 /* Since this is a stateful encoding we have to provide code which resets
  70    the output state to the initial state.  This has to be done during the
  71    flushing.  */
  72 #define EMIT_SHIFT_TO_INIT \
  73   if ((data->__statep->__count & ~7) != sb)                                   \
  74     {                                                                         \
  75       if (FROM_DIRECTION)                                                     \
  76         data->__statep->__count &= 7;                                         \
  77       else                                                                    \
  78         {                                                                     \
  79           /* We are not in the initial state.  To switch back we have         \
  80              to emit `SI'.  */                                                \
  81           if (__builtin_expect (outbuf >= outend, 0))                         \
  82             /* We don't have enough room in the output buffer.  */            \
  83             status = __GCONV_FULL_OUTPUT;                                     \
  84           else                                                                \
  85             {                                                                 \
  86               /* Write out the shift sequence.  */                            \
  87               *outbuf++ = SI;                                                 \
  88               data->__statep->__count &= 7;                                   \
  89             }                                                                 \
  90         }                                                                     \
  91     }
  92
  93
  94 /* Since we might have to reset input pointer we must be able to save
  95    and retore the state.  */
  96 #define SAVE_RESET_STATE(Save) \
  97   if (Save)                                                                   \
  98     save_curcs = *curcsp;                                                     \
  99   else                                                                        \
 100     *curcsp = save_curcs
 101
 102
 103 /* Current codeset type.  */
 104 enum
 105 {
 106   sb = 0,
 107   db = 64
 108 };
 109
 110
 111 /* Subroutine to write out converted UCS4 from IBM-13XX.  */
 112 #ifdef HAS_COMBINED
 113 # define SUB_COMBINED_UCS_FROM_IBM13XX \
 114   {                                                                           \
 115     if (res != UCS_LIMIT || ch < __TO_UCS4_COMBINED_MIN                       \
 116         || ch > __TO_UCS4_COMBINED_MAX)                                       \
 117       {                                                                       \
 118         put32 (outptr, res);                                                  \
 119         outptr += 4;                                                          \
 120       }                                                                       \
 121     else                                                                      \
 122       {                                                                       \
 123         /* This is a combined character.  Make sure we have room.  */         \
 124         if (__builtin_expect (outptr + 8 > outend, 0))                        \
 125           {                                                                   \
 126             result = __GCONV_FULL_OUTPUT;                                     \
 127             break;                                                            \
 128           }                                                                   \
 129                                                                               \
 130         const struct divide *cmbp                                             \
 131           = &DB_TO_UCS4_COMB[ch - __TO_UCS4_COMBINED_MIN];                    \
 132         assert (cmbp->res1 != 0 && cmbp->res2 != 0);                          \
 133                                                                               \
 134         put32 (outptr, cmbp->res1);                                           \
 135         outptr += 4;                                                          \
 136         put32 (outptr, cmbp->res2);                                           \
 137         outptr += 4;                                                          \
 138       }                                                                       \
 139   }
 140 #else
 141 # define SUB_COMBINED_UCS_FROM_IBM13XX \
 142   {                                                                           \
 143     put32 (outptr, res);                                                      \
 144     outptr += 4;                                                              \
 145   }
 146 #endif /* HAS_COMBINED */
 147
 148
 149 /* First, define the conversion function from IBM-13XX to UCS4.  */
 150 #define MIN_NEEDED_INPUT        MIN_NEEDED_FROM
 151 #define MAX_NEEDED_INPUT        MAX_NEEDED_FROM
 152 #define MIN_NEEDED_OUTPUT       MIN_NEEDED_TO
 153 #define LOOPFCT                 FROM_LOOP
 154 #define BODY \
 155   {                                                                           \
 156     uint32_t ch = *inptr;                                                     \
 157                                                                               \
 158     if (__builtin_expect (ch, 0) == SO)                                       \
 159       {                                                                       \
 160         /* Shift OUT, change to DBCS converter.  */                           \
 161         if (curcs == db)                                                      \
 162           {                                                                   \
 163             result = __GCONV_ILLEGAL_INPUT;                                   \
 164             break;                                                            \
 165           }                                                                   \
 166         curcs = db;                                                           \
 167         ++inptr;                                                              \
 168         continue;                                                             \
 169       }                                                                       \
 170     if (__builtin_expect (ch, 0) == SI)                                       \
 171       {                                                                       \
 172         /* Shift IN, change to SBCS converter.  */                            \
 173         if (curcs == sb)                                                      \
 174           {                                                                   \
 175             result = __GCONV_ILLEGAL_INPUT;                                   \
 176             break;                                                            \
 177           }                                                                   \
 178         curcs = sb;                                                           \
 179         ++inptr;                                                              \
 180         continue;                                                             \
 181       }                                                                       \
 182                                                                               \
 183     if (curcs == sb)                                                          \
 184       {                                                                       \
 185         /* Use the IBM13XX table for single byte.  */                         \
 186         uint32_t res = SB_TO_UCS4[ch];                                \
 187         if (__builtin_expect (res, L'\1') == L'\0' && ch != '\0')             \
 188           {                                                                   \
 189             /* This is an illegal character.  */                              \
 190             if (! ignore_errors_p ())                                         \
 191               {                                                               \
 192                 result = __GCONV_ILLEGAL_INPUT;                               \
 193                 break;                                                        \
 194               }                                                               \
 195             ++*irreversible;                                                  \
 196           }                                                                   \
 197         else                                                                  \
 198           {                                                                   \
 199             put32 (outptr, res);                                              \
 200             outptr += 4;                                                      \
 201           }                                                                   \
 202         ++inptr;                                                              \
 203       }                                                                       \
 204     else                                                                      \
 205       {                                                                       \
 206         assert (curcs == db);                                                 \
 207                                                                               \
 208         if (__builtin_expect (inptr + 1 >= inend, 0))                         \
 209           {                                                                   \
 210             /* The second character is not available.  Store the              \
 211                intermediate result.  */                                       \
 212             result = __GCONV_INCOMPLETE_INPUT;                                \
 213             break;                                                            \
 214           }                                                                   \
 215                                                                               \
 216         ch = (ch * 0x100) + inptr[1];                                         \
 217                                                                               \
 218         /* Use the IBM1364 table for double byte.  */                         \
 219         const struct gap *rp2 = DB_TO_UCS4_IDX;                               \
 220         while (ch > rp2->end)                                                 \
 221           ++rp2;                                                              \
 222                                                                               \
 223         uint32_t res;                                                         \
 224         if (__builtin_expect (ch < rp2->start, 0)                             \
 225             || (res = DB_TO_UCS4[ch + rp2->idx],                              \
 226                 __builtin_expect (res, L'\1') == L'\0' && ch != '\0'))        \
 227           {                                                                   \
 228             /* This is an illegal character.  */                              \
 229             if (! ignore_errors_p ())                                         \
 230               {                                                               \
 231                 result = __GCONV_ILLEGAL_INPUT;                               \
 232                 break;                                                        \
 233               }                                                               \
 234             ++*irreversible;                                                  \
 235           }                                                                   \
 236         else                                                                  \
 237           {                                                                   \
 238             SUB_COMBINED_UCS_FROM_IBM13XX;                                    \
 239           }                                                                   \
 240         inptr += 2;                                                           \
 241       }                                                                       \
 242   }
 243 #define LOOP_NEED_FLAGS
 244 #define EXTRA_LOOP_DECLS        , int *curcsp
 245 #define INIT_PARAMS             int curcs = *curcsp & ~7
 246 #define UPDATE_PARAMS           *curcsp = curcs
 247 #include <iconv/loop.c>
 248
 249
 250 /* Subroutine to convert two UCS4 codes to IBM-13XX.  */
 251 #ifdef HAS_COMBINED
 252 # define SUB_COMBINED_UCS_TO_IBM13XX \
 253   {                                                                           \
 254     const struct combine *cmbp = UCS4_COMB_TO_DB;                             \
 255     while (cmbp->res1 < ch)                                                   \
 256       ++cmbp;                                                                 \
 257     /* XXX if last char is beginning of combining store in state */           \
 258     if (cmbp->res1 == ch && inptr + 4 < inend)                                \
 259       {                                                                       \
 260         /* See if input is part of a combined character.  */                  \
 261         uint32_t ch_next = get32 (inptr + 4);                                 \
 262         while (cmbp->res2 != ch_next)                                         \
 263           {                                                                   \
 264             ++cmbp;                                                           \
 265             if (cmbp->res1 != ch)                                             \
 266               goto not_combined;                                              \
 267           }                                                                   \
 268                                                                               \
 269         /* It is a combined character.  First make sure we are in             \
 270            double byte mode.  */                                              \
 271         if (curcs == sb)                                                      \
 272           {                                                                   \
 273             /* We know there is room for at least one byte.  */               \
 274             *outptr++ = SO;                                                   \
 275             curcs = db;                                                       \
 276           }                                                                   \
 277                                                                               \
 278         if (__builtin_expect (outptr + 2 > outend, 0))                        \
 279           {                                                                   \
 280             result = __GCONV_FULL_OUTPUT;                                     \
 281             break;                                                            \
 282           }                                                                   \
 283         *outptr++ = cmbp->ch[0];                                              \
 284         *outptr++ = cmbp->ch[1];                                              \
 285         inptr += 8;                                                           \
 286         continue;                                                             \
 287                                                                               \
 288       not_combined:;                                                          \
 289       }                                                                       \
 290   }
 291 #else
 292 # define SUB_COMBINED_UCS_TO_IBM13XX
 293 #endif /* HAS_COMBINED */
 294
 295
 296 /* Next, define the other direction.  */
 297 #define MIN_NEEDED_INPUT        MIN_NEEDED_TO
 298 #define MIN_NEEDED_OUTPUT       MIN_NEEDED_FROM
 299 #define MAX_NEEDED_OUTPUT       MAX_NEEDED_FROM
 300 #define LOOPFCT                 TO_LOOP
 301 #define BODY \
 302   {                                                                           \
 303     uint32_t ch = get32 (inptr);                                              \
 304                                                                               \
 305     if (__builtin_expect (ch >= UCS_LIMIT, 0))                                \
 306       {                                                                       \
 307         UNICODE_TAG_HANDLER (ch, 4);                                          \
 308                                                                               \
 309         if (! ignore_errors_p ())                                             \
 310           {                                                                   \
 311             result = __GCONV_ILLEGAL_INPUT;                                   \
 312             break;                                                            \
 313           }                                                                   \
 314         ++*irreversible;                                                      \
 315         inptr += 4;                                                           \
 316         continue;                                                             \
 317       }                                                                       \
 318                                                                               \
 319     SUB_COMBINED_UCS_TO_IBM13XX;                                              \
 320                                                                               \
 321     const struct gap *rp1 = UCS4_TO_SB_IDX;                                   \
 322     while (ch > rp1->end)                                                     \
 323       ++rp1;                                                                  \
 324                                                                               \
 325     /* Use the UCS4 table for single byte.  */                                \
 326     const char *cp;                                                           \
 327     if (__builtin_expect (ch < rp1->start, 0)                                 \
 328         || (cp = UCS4_TO_SB[ch + rp1->idx],                                   \
 329             __builtin_expect (cp[0], L'\1') == L'\0' && ch != '\0'))          \
 330       {                                                                       \
 331         /* Use the UCS4 table for double byte.  */                            \
 332         const struct gap *rp2 = UCS4_TO_DB_IDX;                               \
 333         while (ch > rp2->end)                                                 \
 334           ++rp2;                                                              \
 335                                                                               \
 336         if (__builtin_expect (ch < rp2->start, 0)                             \
 337             || (cp = UCS4_TO_DB[ch + rp2->idx],                               \
 338                 __builtin_expect (cp[0], L'\1') == L'\0' && ch != '\0'))      \
 339           {                                                                   \
 340             /* This is an illegal character.  */                              \
 341             if (! ignore_errors_p ())                                         \
 342               {                                                               \
 343                 result = __GCONV_ILLEGAL_INPUT;                               \
 344                 break;                                                        \
 345               }                                                               \
 346             ++*irreversible;                                                  \
 347           }                                                                   \
 348         else                                                                  \
 349           {                                                                   \
 350             if (curcs == sb)                                                  \
 351               {                                                               \
 352                 /* We know there is room for at least one byte.  */           \
 353                 *outptr++ = SO;                                               \
 354                 curcs = db;                                                   \
 355               }                                                               \
 356                                                                               \
 357             if (__builtin_expect (outptr + 2 > outend, 0))                    \
 358               {                                                               \
 359                 result = __GCONV_FULL_OUTPUT;                                 \
 360                 break;                                                        \
 361               }                                                               \
 362             *outptr++ = cp[0];                                                \
 363             *outptr++ = cp[1];                                                \
 364           }                                                                   \
 365       }                                                                       \
 366     else                                                                      \
 367       {                                                                       \
 368         if (__builtin_expect (curcs == db, 0))                                \
 369           {                                                                   \
 370             /* We know there is room for at least one byte.  */               \
 371             *outptr++ = SI;                                                   \
 372             curcs = sb;                                                       \
 373                                                                               \
 374             if (__builtin_expect (outptr >= outend, 0))                       \
 375               {                                                               \
 376                 result = __GCONV_FULL_OUTPUT;                                 \
 377                 break;                                                        \
 378               }                                                               \
 379           }                                                                   \
 380                                                                               \
 381         *outptr++ = cp[0];                                                    \
 382       }                                                                       \
 383                                                                               \
 384     /* Now that we wrote the output increment the input pointer.  */          \
 385     inptr += 4;                                                               \
 386   }
 387 #define LOOP_NEED_FLAGS
 388 #define EXTRA_LOOP_DECLS        , int *curcsp
 389 #define INIT_PARAMS             int curcs = *curcsp & ~7
 390 #define REINIT_PARAMS           curcs = *curcsp & ~7
 391 #define UPDATE_PARAMS           *curcsp = curcs
 392 #include <iconv/loop.c>
 393
 394 /* Now define the toplevel functions.  */
 395 #include <iconv/skeleton.c>