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, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #include <dlfcn.h>
  21 #include <stdint.h>
  22 #include <wchar.h>
  23 #include <byteswap.h>
  24
  25 #ifndef CHARSET_NAME
  26 /* This is really the IBM1364 converter, not another module sharing
  27    the code.  */
  28 # define DATA_HEADER    "ibm1364.h"
  29 # define CHARSET_NAME   "IBM1364//"
  30 # define FROM_LOOP      from_ibm1364
  31 # define TO_LOOP        to_ibm1364
  32 # define SB_TO_UCS4     __ibm1364sb_to_ucs4
  33 # define DB_TO_UCS4_IDX __ibm1364db_to_ucs4_idx
  34 # define DB_TO_UCS4     __ibm1364db_to_ucs4
  35 # define UCS4_TO_SB_IDX __ucs4_to_ibm1364sb_idx
  36 # define UCS4_TO_SB     __ucs4_to_ibm1364sb
  37 # define UCS4_TO_DB_IDX __ucs4_to_ibm1364db_idx
  38 # define UCS4_TO_DB     __ucs4_to_ibm1364db
  39 # define UCS_LIMIT      0xffff
  40 #endif
  41
  42
  43 #include DATA_HEADER
  44
  45 /* The shift sequences for this charset (it does not use ESC).  */
  46 #define SI              0x0F  /* Shift In, host code to turn DBCS off.  */
  47 #define SO              0x0E  /* Shift Out, host code to turn DBCS on.  */
  48
  49 /* Definitions used in the body of the `gconv' function.  */
  50 #define MIN_NEEDED_FROM 1
  51 #define MAX_NEEDED_FROM 2
  52 #define MIN_NEEDED_TO   4
  53 #ifdef HAS_COMBINED
  54 # define MAX_NEEDED_TO  8
  55 #else
  56 # define MAX_NEEDED_TO  4
  57 #endif
  58 #define PREPARE_LOOP \
  59   int save_curcs;                                                             \
  60   int *curcsp = &data->__statep->__count;
  61 #define EXTRA_LOOP_ARGS         , curcsp
  62
  63 /* Definitions of initialization and destructor function.  */
  64 #define DEFINE_INIT     1
  65 #define DEFINE_FINI     1
  66
  67
  68 /* Since this is a stateful encoding we have to provide code which resets
  69    the output state to the initial state.  This has to be done during the
  70    flushing.  */
  71 #define EMIT_SHIFT_TO_INIT \
  72   if ((data->__statep->__count & ~7) != sb)                                   \
  73     {                                                                         \
  74       if (FROM_DIRECTION)                                                     \
  75         data->__statep->__count &= 7;                                         \
  76       else                                                                    \
  77         {                                                                     \
  78           /* We are not in the initial state.  To switch back we have         \
  79              to emit `SI'.  */                                                \
  80           if (__builtin_expect (outbuf >= outend, 0))                         \
  81             /* We don't have enough room in the output buffer.  */            \
  82             status = __GCONV_FULL_OUTPUT;                                     \
  83           else                                                                \
  84             {                                                                 \
  85               /* Write out the shift sequence.  */                            \
  86               *outbuf++ = SI;                                                 \
  87               data->__statep->__count &= 7;                                   \
  88             }                                                                 \
  89         }                                                                     \
  90     }
  91
  92
  93 /* Since we might have to reset input pointer we must be able to save
  94    and retore the state.  */
  95 #define SAVE_RESET_STATE(Save) \
  96   if (Save)                                                                   \
  97     save_curcs = *curcsp;                                                     \
  98   else                                                                        \
  99     *curcsp = save_curcs
 100
 101
 102 /* Current codeset type.  */
 103 enum
 104 {
 105   sb = 0,
 106   db = 64
 107 };
 108
 109
 110 /* Subroutine to write out converted UCS4 from IBM-13XX.  */
 111 #ifdef HAS_COMBINED
 112 # define SUB_COMBINED_UCS_FROM_IBM13XX \
 113   {                                                                           \
 114     if (res != UCS_LIMIT || ch < __TO_UCS4_COMBINED_MIN                       \
 115         || ch > __TO_UCS4_COMBINED_MAX)                                       \
 116       {                                                                       \
 117         put32 (outptr, res);                                                  \
 118         outptr += 4;                                                          \
 119       }                                                                       \
 120     else                                                                      \
 121       {                                                                       \
 122         /* This is a combined character.  Make sure we have room.  */         \
 123         if (__builtin_expect (outptr + 8 > outend, 0))                        \
 124           {                                                                   \
 125             result = __GCONV_FULL_OUTPUT;                                     \
 126             break;                                                            \
 127           }                                                                   \
 128                                                                               \
 129         const struct divide *cmbp                                             \
 130           = &DB_TO_UCS4_COMB[ch - __TO_UCS4_COMBINED_MIN];                    \
 131         assert (cmbp->res1 != 0 && cmbp->res2 != 0);                          \
 132                                                                               \
 133         put32 (outptr, cmbp->res1);                                           \
 134         outptr += 4;                                                          \
 135         put32 (outptr, cmbp->res2);                                           \
 136         outptr += 4;                                                          \
 137       }                                                                       \
 138   }
 139 #else
 140 # define SUB_COMBINED_UCS_FROM_IBM13XX \
 141   {                                                                           \
 142     put32 (outptr, res);                                                      \
 143     outptr += 4;                                                              \
 144   }
 145 #endif /* HAS_COMBINED */
 146
 147
 148 /* First, define the conversion function from IBM-13XX to UCS4.  */
 149 #define MIN_NEEDED_INPUT        MIN_NEEDED_FROM
 150 #define MAX_NEEDED_INPUT        MAX_NEEDED_FROM
 151 #define MIN_NEEDED_OUTPUT       MIN_NEEDED_TO
 152 #define LOOPFCT                 FROM_LOOP
 153 #define BODY \
 154   {                                                                           \
 155     uint32_t ch = *inptr;                                                     \
 156                                                                               \
 157     if (__builtin_expect (ch, 0) == SO)                                       \
 158       {                                                                       \
 159         /* Shift OUT, change to DBCS converter.  */                           \
 160         if (curcs == db)                                                      \
 161           {                                                                   \
 162             result = __GCONV_ILLEGAL_INPUT;                                   \
 163             break;                                                            \
 164           }                                                                   \
 165         curcs = db;                                                           \
 166         ++inptr;                                                              \
 167         continue;                                                             \
 168       }                                                                       \
 169     if (__builtin_expect (ch, 0) == SI)                                       \
 170       {                                                                       \
 171         /* Shift IN, change to SBCS converter.  */                            \
 172         if (curcs == sb)                                                      \
 173           {                                                                   \
 174             result = __GCONV_ILLEGAL_INPUT;                                   \
 175             break;                                                            \
 176           }                                                                   \
 177         curcs = sb;                                                           \
 178         ++inptr;                                                              \
 179         continue;                                                             \
 180       }                                                                       \
 181                                                                               \
 182     if (curcs == sb)                                                          \
 183       {                                                                       \
 184         /* Use the IBM13XX table for single byte.  */                         \
 185         uint32_t res = SB_TO_UCS4[ch];                                \
 186         if (__builtin_expect (res, L'\1') == L'\0' && ch != '\0')             \
 187           {                                                                   \
 188             /* This is an illegal character.  */                              \
 189             if (! ignore_errors_p ())                                         \
 190               {                                                               \
 191                 result = __GCONV_ILLEGAL_INPUT;                               \
 192                 break;                                                        \
 193               }                                                               \
 194             ++*irreversible;                                                  \
 195           }                                                                   \
 196         else                                                                  \
 197           {                                                                   \
 198             put32 (outptr, res);                                              \
 199             outptr += 4;                                                      \
 200           }                                                                   \
 201         ++inptr;                                                              \
 202       }                                                                       \
 203     else                                                                      \
 204       {                                                                       \
 205         assert (curcs == db);                                                 \
 206                                                                               \
 207         if (__builtin_expect (inptr + 1 >= inend, 0))                         \
 208           {                                                                   \
 209             /* The second character is not available.  Store the              \
 210                intermediate result.  */                                       \
 211             result = __GCONV_INCOMPLETE_INPUT;                                \
 212             break;                                                            \
 213           }                                                                   \
 214                                                                               \
 215         ch = (ch * 0x100) + inptr[1];                                         \
 216                                                                               \
 217         /* Use the IBM1364 table for double byte.  */                         \
 218         const struct gap *rp2 = DB_TO_UCS4_IDX;                               \
 219         while (ch > rp2->end)                                                 \
 220           ++rp2;                                                              \
 221                                                                               \
 222         uint32_t res;                                                         \
 223         if (__builtin_expect (ch < rp2->start, 0)                             \
 224             || (res = DB_TO_UCS4[ch + rp2->idx],                              \
 225                 __builtin_expect (res, L'\1') == L'\0' && ch != '\0'))        \
 226           {                                                                   \
 227             /* This is an illegal character.  */                              \
 228             if (! ignore_errors_p ())                                         \
 229               {                                                               \
 230                 result = __GCONV_ILLEGAL_INPUT;                               \
 231                 break;                                                        \
 232               }                                                               \
 233             ++*irreversible;                                                  \
 234           }                                                                   \
 235         else                                                                  \
 236           {                                                                   \
 237             SUB_COMBINED_UCS_FROM_IBM13XX;                                    \
 238           }                                                                   \
 239         inptr += 2;                                                           \
 240       }                                                                       \
 241   }
 242 #define LOOP_NEED_FLAGS
 243 #define EXTRA_LOOP_DECLS        , int *curcsp
 244 #define INIT_PARAMS             int curcs = *curcsp & ~7
 245 #define UPDATE_PARAMS           *curcsp = curcs
 246 #include <iconv/loop.c>
 247
 248
 249 /* Subroutine to convert two UCS4 codes to IBM-13XX.  */
 250 #ifdef HAS_COMBINED
 251 # define SUB_COMBINED_UCS_TO_IBM13XX \
 252   {                                                                           \
 253     const struct combine *cmbp = UCS4_COMB_TO_DB;                             \
 254     while (cmbp->res1 < ch)                                                   \
 255       ++cmbp;                                                                 \
 256     /* XXX if last char is beginning of combining store in state */           \
 257     if (cmbp->res1 == ch && inptr + 4 < inend)                                \
 258       {                                                                       \
 259         /* See if input is part of a combined character.  */                  \
 260         uint32_t ch_next = get32 (inptr + 4);                                 \
 261         while (cmbp->res2 != ch_next)                                         \
 262           {                                                                   \
 263             ++cmbp;                                                           \
 264             if (cmbp->res1 != ch)                                             \
 265               goto not_combined;                                              \
 266           }                                                                   \
 267                                                                               \
 268         /* It is a combined character.  First make sure we are in             \
 269            double byte mode.  */                                              \
 270         if (curcs == sb)                                                      \
 271           {                                                                   \
 272             /* We know there is room for at least one byte.  */               \
 273             *outptr++ = SO;                                                   \
 274             curcs = db;                                                       \
 275           }                                                                   \
 276                                                                               \
 277         if (__builtin_expect (outptr + 2 > outend, 0))                        \
 278           {                                                                   \
 279             result = __GCONV_FULL_OUTPUT;                                     \
 280             break;                                                            \
 281           }                                                                   \
 282         *outptr++ = cmbp->ch[0];                                              \
 283         *outptr++ = cmbp->ch[1];                                              \
 284         inptr += 8;                                                           \
 285         continue;                                                             \
 286                                                                               \
 287       not_combined:;                                                          \
 288       }                                                                       \
 289   }
 290 #else
 291 # define SUB_COMBINED_UCS_TO_IBM13XX
 292 #endif /* HAS_COMBINED */
 293
 294
 295 /* Next, define the other direction.  */
 296 #define MIN_NEEDED_INPUT        MIN_NEEDED_TO
 297 #define MIN_NEEDED_OUTPUT       MIN_NEEDED_FROM
 298 #define MAX_NEEDED_OUTPUT       MAX_NEEDED_FROM
 299 #define LOOPFCT                 TO_LOOP
 300 #define BODY \
 301   {                                                                           \
 302     uint32_t ch = get32 (inptr);                                              \
 303                                                                               \
 304     if (__builtin_expect (ch >= UCS_LIMIT, 0))                                \
 305       {                                                                       \
 306         UNICODE_TAG_HANDLER (ch, 4);                                          \
 307                                                                               \
 308         if (! ignore_errors_p ())                                             \
 309           {                                                                   \
 310             result = __GCONV_ILLEGAL_INPUT;                                   \
 311             break;                                                            \
 312           }                                                                   \
 313         ++*irreversible;                                                      \
 314         inptr += 4;                                                           \
 315         continue;                                                             \
 316       }                                                                       \
 317                                                                               \
 318     SUB_COMBINED_UCS_TO_IBM13XX;                                              \
 319                                                                               \
 320     const struct gap *rp1 = UCS4_TO_SB_IDX;                                   \
 321     while (ch > rp1->end)                                                     \
 322       ++rp1;                                                                  \
 323                                                                               \
 324     /* Use the UCS4 table for single byte.  */                                \
 325     const char *cp;                                                           \
 326     if (__builtin_expect (ch < rp1->start, 0)                                 \
 327         || (cp = UCS4_TO_SB[ch + rp1->idx],                                   \
 328             __builtin_expect (cp[0], L'\1') == L'\0' && ch != '\0'))          \
 329       {                                                                       \
 330         /* Use the UCS4 table for double byte.  */                            \
 331         const struct gap *rp2 = UCS4_TO_DB_IDX;                               \
 332         while (ch > rp2->end)                                                 \
 333           ++rp2;                                                              \
 334                                                                               \
 335         if (__builtin_expect (ch < rp2->start, 0)                             \
 336             || (cp = UCS4_TO_DB[ch + rp2->idx],                               \
 337                 __builtin_expect (cp[0], L'\1') == L'\0' && ch != '\0'))      \
 338           {                                                                   \
 339             /* This is an illegal character.  */                              \
 340             if (! ignore_errors_p ())                                         \
 341               {                                                               \
 342                 result = __GCONV_ILLEGAL_INPUT;                               \
 343                 break;                                                        \
 344               }                                                               \
 345             ++*irreversible;                                                  \
 346           }                                                                   \
 347         else                                                                  \
 348           {                                                                   \
 349             if (curcs == sb)                                                  \
 350               {                                                               \
 351                 /* We know there is room for at least one byte.  */           \
 352                 *outptr++ = SO;                                               \
 353                 curcs = db;                                                   \
 354               }                                                               \
 355                                                                               \
 356             if (__builtin_expect (outptr + 2 > outend, 0))                    \
 357               {                                                               \
 358                 result = __GCONV_FULL_OUTPUT;                                 \
 359                 break;                                                        \
 360               }                                                               \
 361             *outptr++ = cp[0];                                                \
 362             *outptr++ = cp[1];                                                \
 363           }                                                                   \
 364       }                                                                       \
 365     else                                                                      \
 366       {                                                                       \
 367         if (__builtin_expect (curcs == db, 0))                                \
 368           {                                                                   \
 369             /* We know there is room for at least one byte.  */               \
 370             *outptr++ = SI;                                                   \
 371             curcs = sb;                                                       \
 372                                                                               \
 373             if (__builtin_expect (outptr >= outend, 0))                       \
 374               {                                                               \
 375                 result = __GCONV_FULL_OUTPUT;                                 \
 376                 break;                                                        \
 377               }                                                               \
 378           }                                                                   \
 379                                                                               \
 380         *outptr++ = cp[0];                                                    \
 381       }                                                                       \
 382                                                                               \
 383     /* Now that we wrote the output increment the input pointer.  */          \
 384     inptr += 4;                                                               \
 385   }
 386 #define LOOP_NEED_FLAGS
 387 #define EXTRA_LOOP_DECLS        , int *curcsp
 388 #define INIT_PARAMS             int curcs = *curcsp & ~7
 389 #define REINIT_PARAMS           curcs = *curcsp & ~7
 390 #define UPDATE_PARAMS           *curcsp = curcs
 391 #include <iconv/loop.c>
 392
 393 /* Now define the toplevel functions.  */
 394 #include <iconv/skeleton.c>