iconvdata/iso-2022-cn-ext.c

   1 /* Conversion module for ISO-2022-CN-EXT.
   2    Copyright (C) 2000-2017 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Ulrich Drepper <drepper@cygnus.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 <gconv.h>
  22 #include <stdint.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25 #include "gb2312.h"
  26 #include "iso-ir-165.h"
  27 #include "cns11643.h"
  28 #include "cns11643l1.h"
  29 #include "cns11643l2.h"
  30 #include <libc-diag.h>
  31
  32 #include <assert.h>
  33
  34 /* This makes obvious what everybody knows: 0x1b is the Esc character.  */
  35 #define ESC     0x1b
  36
  37 /* We have single-byte shift-in and shift-out sequences, and the single
  38    shift sequences SS2 and SS3 which replaces the SS2/SS3 designation for
  39    the next two bytes.  */
  40 #define SI      0x0f
  41 #define SO      0x0e
  42 #define SS2_0   ESC
  43 #define SS2_1   0x4e
  44 #define SS3_0   ESC
  45 #define SS3_1   0x4f
  46
  47 /* Definitions used in the body of the `gconv' function.  */
  48 #define CHARSET_NAME            "ISO-2022-CN-EXT//"
  49 #define DEFINE_INIT             1
  50 #define DEFINE_FINI             1
  51 #define ONE_DIRECTION           0
  52 #define FROM_LOOP               from_iso2022cn_ext_loop
  53 #define TO_LOOP                 to_iso2022cn_ext_loop
  54 #define FROM_LOOP_MIN_NEEDED_FROM       1
  55 #define FROM_LOOP_MAX_NEEDED_FROM       4
  56 #define FROM_LOOP_MIN_NEEDED_TO         4
  57 #define FROM_LOOP_MAX_NEEDED_TO         4
  58 #define TO_LOOP_MIN_NEEDED_FROM         4
  59 #define TO_LOOP_MAX_NEEDED_FROM         4
  60 #define TO_LOOP_MIN_NEEDED_TO           1
  61 #define TO_LOOP_MAX_NEEDED_TO           6
  62 #define PREPARE_LOOP \
  63   int save_set;                                                               \
  64   int *setp = &data->__statep->__count;
  65 #define EXTRA_LOOP_ARGS         , setp
  66
  67
  68 /* The charsets GB/T 12345-90, GB 7589-87, GB/T 13131-9X, GB 7590-87,
  69    and GB/T 13132-9X are not registered to the best of my knowledge and
  70    therefore have no escape sequence assigned.  We cannot handle them
  71    for this reason.  Tell the implementation about this.  */
  72 #define X12345  '\0'
  73 #define X7589   '\0'
  74 #define X13131  '\0'
  75 #define X7590   '\0'
  76 #define X13132  '\0'
  77
  78
  79 /* The COUNT element of the state keeps track of the currently selected
  80    character set.  The possible values are:  */
  81 enum
  82 {
  83   ASCII_set = 0,
  84   GB2312_set,
  85   GB12345_set,
  86   CNS11643_1_set,
  87   ISO_IR_165_set,
  88   SO_mask = 7,
  89
  90   GB7589_set = 1 << 3,
  91   GB13131_set = 2 << 3,
  92   CNS11643_2_set = 3 << 3,
  93   SS2_mask = 3 << 3,
  94
  95   GB7590_set = 1 << 5,
  96   GB13132_set = 2 << 5,
  97   CNS11643_3_set = 3 << 5,
  98   CNS11643_4_set = 4 << 5,
  99   CNS11643_5_set = 5 << 5,
 100   CNS11643_6_set = 6 << 5,
 101   CNS11643_7_set = 7 << 5,
 102   SS3_mask = 7 << 5,
 103
 104 #define CURRENT_MASK (SO_mask | SS2_mask | SS3_mask)
 105
 106   GB2312_ann = 1 << 8,
 107   GB12345_ann = 2 << 8,
 108   CNS11643_1_ann = 3 << 8,
 109   ISO_IR_165_ann = 4 << 8,
 110   SO_ann = 7 << 8,
 111
 112   GB7589_ann = 1 << 11,
 113   GB13131_ann = 2 << 11,
 114   CNS11643_2_ann = 3 << 11,
 115   SS2_ann = 3 << 11,
 116
 117   GB7590_ann = 1 << 13,
 118   GB13132_ann = 2 << 13,
 119   CNS11643_3_ann = 3 << 13,
 120   CNS11643_4_ann = 4 << 13,
 121   CNS11643_5_ann = 5 << 13,
 122   CNS11643_6_ann = 6 << 13,
 123   CNS11643_7_ann = 7 << 13,
 124   SS3_ann = 7 << 13
 125 };
 126
 127
 128 /* Since this is a stateful encoding we have to provide code which resets
 129    the output state to the initial state.  This has to be done during the
 130    flushing.  */
 131 #define EMIT_SHIFT_TO_INIT \
 132   if (data->__statep->__count >> 3 != ASCII_set)                              \
 133     {                                                                         \
 134       if (FROM_DIRECTION)                                                     \
 135         /* It's easy, we don't have to emit anything, we just reset the       \
 136            state for the input.  */                                           \
 137         data->__statep->__count = ASCII_set << 3;                             \
 138       else                                                                    \
 139         {                                                                     \
 140           /* We are not in the initial state.  To switch back we have         \
 141              to emit `SI'.  */                                                \
 142           if (__glibc_unlikely (outbuf == outend))                            \
 143             /* We don't have enough room in the output buffer.  */            \
 144             status = __GCONV_FULL_OUTPUT;                                     \
 145           else                                                                \
 146             {                                                                 \
 147               /* Write out the shift sequence.  */                            \
 148               *outbuf++ = SI;                                                 \
 149               if (data->__flags & __GCONV_IS_LAST)                            \
 150                 *irreversible += 1;                                           \
 151               data->__statep->__count = ASCII_set << 3;                       \
 152             }                                                                 \
 153         }                                                                     \
 154     }
 155
 156
 157 /* Since we might have to reset input pointer we must be able to save
 158    and retore the state.  */
 159 #define SAVE_RESET_STATE(Save) \
 160   if (Save)                                                                   \
 161     save_set = *setp;                                                         \
 162   else                                                                        \
 163     *setp = save_set
 164
 165
 166 /* First define the conversion function from ISO-2022-CN to UCS4.  */
 167 #define MIN_NEEDED_INPUT        FROM_LOOP_MIN_NEEDED_FROM
 168 #define MAX_NEEDED_INPUT        FROM_LOOP_MAX_NEEDED_FROM
 169 #define MIN_NEEDED_OUTPUT       FROM_LOOP_MIN_NEEDED_TO
 170 #define MAX_NEEDED_OUTPUT       FROM_LOOP_MAX_NEEDED_TO
 171 #define LOOPFCT                 FROM_LOOP
 172 #define BODY \
 173   {                                                                           \
 174     uint32_t ch = *inptr;                                                     \
 175                                                                               \
 176     /* This is a 7bit character set, disallow all 8bit characters.  */        \
 177     if (ch > 0x7f)                                                            \
 178       STANDARD_FROM_LOOP_ERR_HANDLER (1);                                     \
 179                                                                               \
 180     /* Recognize escape sequences.  */                                        \
 181     if (ch == ESC)                                                            \
 182       {                                                                       \
 183         /* There are three kinds of escape sequences we have to handle:       \
 184            - those announcing the use of GB and CNS characters on the         \
 185              line; we can simply ignore them                                  \
 186            - the initial byte of the SS2 sequence.                            \
 187            - the initial byte of the SS3 sequence.                            \
 188         */                                                                    \
 189         if (inptr + 2 > inend                                                 \
 190             || (inptr[1] == '$'                                               \
 191                 && (inptr + 3 > inend                                         \
 192                     || (inptr[2] == ')' && inptr + 4 > inend)                 \
 193                     || (inptr[2] == '*' && inptr + 4 > inend)                 \
 194                     || (inptr[2] == '+' && inptr + 4 > inend)))               \
 195             || (inptr[1] == SS2_1 && inptr + 4 > inend)                       \
 196             || (inptr[1] == SS3_1 && inptr + 4 > inend))                      \
 197           {                                                                   \
 198             result = __GCONV_INCOMPLETE_INPUT;                                \
 199             break;                                                            \
 200           }                                                                   \
 201         if (inptr[1] == '$'                                                   \
 202             && ((inptr[2] == ')'                                              \
 203                  && (inptr[3] == 'A'                                          \
 204                      || (X12345 != '\0' && inptr[3] == X12345)                \
 205                      || inptr[3] == 'E' || inptr[3] == 'G'))                  \
 206                 || (inptr[2] == '*'                                           \
 207                     && ((X7589 != '\0' && inptr[3] == X7589)                  \
 208                         || (X13131 != '\0' && inptr[3] == X13131)             \
 209                         || inptr[3] == 'H'))                                  \
 210                 || (inptr[2] == '+'                                           \
 211                     && ((X7590 != '\0' && inptr[3] == X7590)                  \
 212                         || (X13132 != '\0' && inptr[3] == X13132)             \
 213                         || inptr[3] == 'I' || inptr[3] == 'J'                 \
 214                         || inptr[3] == 'K' || inptr[3] == 'L'                 \
 215                         || inptr[3] == 'M'))))                                \
 216           {                                                                   \
 217             /* OK, we accept those character sets.  */                        \
 218             if (inptr[3] == 'A')                                              \
 219               ann = (ann & ~SO_ann) | GB2312_ann;                             \
 220             else if (inptr[3] == 'G')                                         \
 221               ann = (ann & ~SO_ann) | CNS11643_1_ann;                         \
 222             else if (inptr[3] == 'E')                                         \
 223               ann = (ann & ~SO_ann) | ISO_IR_165_ann;                         \
 224             else if (X12345 != '\0' && inptr[3] == X12345)                    \
 225               ann = (ann & ~SO_ann) | GB12345_ann;                            \
 226             else if (inptr[3] == 'H')                                         \
 227               ann = (ann & ~SS2_ann) | CNS11643_2_ann;                        \
 228             else if (X7589 != '\0' && inptr[3] == X7589)                      \
 229               ann = (ann & ~SS2_ann) | GB7589_ann;                            \
 230             else if (X13131 != '\0' && inptr[3] == X13131)                    \
 231               ann = (ann & ~SS2_ann) | GB13131_ann;                           \
 232             else if (inptr[3] == 'I')                                         \
 233               ann = (ann & ~SS3_ann) | CNS11643_3_ann;                        \
 234             else if (inptr[3] == 'J')                                         \
 235               ann = (ann & ~SS3_ann) | CNS11643_4_ann;                        \
 236             else if (inptr[3] == 'K')                                         \
 237               ann = (ann & ~SS3_ann) | CNS11643_5_ann;                        \
 238             else if (inptr[3] == 'L')                                         \
 239               ann = (ann & ~SS3_ann) | CNS11643_6_ann;                        \
 240             else if (inptr[3] == 'M')                                         \
 241               ann = (ann & ~SS3_ann) | CNS11643_7_ann;                        \
 242             else if (X7590 != '\0' && inptr[3] == X7590)                      \
 243               ann = (ann & ~SS3_ann) | GB7590_ann;                            \
 244             else if (X13132 != '\0' && inptr[3] == X13132)                    \
 245               ann = (ann & ~SS3_ann) | GB13132_ann;                           \
 246             inptr += 4;                                                       \
 247             continue;                                                         \
 248           }                                                                   \
 249       }                                                                       \
 250     else if (ch == SO)                                                        \
 251       {                                                                       \
 252         /* Switch to use GB2312, GB12345, CNS 11643 plane 1, or ISO-IR-165,   \
 253            depending on which S0 designation came last.  The only problem     \
 254            is what to do with faulty input files where no designator came.    \
 255            XXX For now I'll default to use GB2312.  If this is not the        \
 256            best behavior (e.g., we should flag an error) let me know.  */     \
 257         ++inptr;                                                              \
 258         if ((ann & SO_ann) != 0)                                              \
 259           switch (ann & SO_ann)                                               \
 260             {                                                                 \
 261             case GB2312_ann:                                                  \
 262               set = GB2312_set;                                               \
 263               break;                                                          \
 264             case GB12345_ann:                                                 \
 265               set = GB12345_set;                                              \
 266               break;                                                          \
 267             case CNS11643_1_ann:                                              \
 268               set = CNS11643_1_set;                                           \
 269               break;                                                          \
 270             case ISO_IR_165_ann:                                              \
 271               set = ISO_IR_165_set;                                           \
 272               break;                                                          \
 273             default:                                                          \
 274               abort ();                                                       \
 275             }                                                                 \
 276         else                                                                  \
 277           {                                                                   \
 278             STANDARD_FROM_LOOP_ERR_HANDLER (1);                               \
 279           }                                                                   \
 280         continue;                                                             \
 281       }                                                                       \
 282     else if (ch == SI)                                                        \
 283       {                                                                       \
 284         /* Switch to use ASCII.  */                                           \
 285         ++inptr;                                                              \
 286         set = ASCII_set;                                                      \
 287         continue;                                                             \
 288       }                                                                       \
 289                                                                               \
 290     if (ch == ESC && inptr[1] == SS2_1)                                       \
 291       {                                                                       \
 292         /* This is a character from CNS 11643 plane 2.                        \
 293            XXX We could test here whether the use of this character           \
 294            set was announced.                                                 \
 295            XXX Currently GB7589 and GB13131 are not supported.  */            \
 296         inptr += 2;                                                           \
 297         ch = cns11643l2_to_ucs4 (&inptr, 2, 0);                               \
 298         if (ch == __UNKNOWN_10646_CHAR)                                       \
 299           STANDARD_FROM_LOOP_ERR_HANDLER (2);                                 \
 300       }                                                                       \
 301     /* Note that we can assume here that at least 4 bytes are available if    \
 302        the first byte is ESC since otherwise the first if would have been     \
 303        true.  */                                                              \
 304     else if (ch == ESC && inptr[1] == SS3_1)                                  \
 305       {                                                                       \
 306         /* This is a character from CNS 11643 plane 3 or higher.              \
 307            XXX Currently GB7590 and GB13132 are not supported.  */            \
 308         unsigned char buf[3];                                                 \
 309         const unsigned char *tmp = buf;                                       \
 310                                                                               \
 311         buf[1] = inptr[2];                                                    \
 312         buf[2] = inptr[3];                                                    \
 313         switch (ann & SS3_ann)                                                \
 314           {                                                                   \
 315           case CNS11643_3_ann:                                                \
 316             buf[0] = 0x23;                                                    \
 317             ch = cns11643_to_ucs4 (&tmp, 3, 0);                               \
 318             break;                                                            \
 319           case CNS11643_4_ann:                                                \
 320             buf[0] = 0x24;                                                    \
 321             ch = cns11643_to_ucs4 (&tmp, 3, 0);                               \
 322             break;                                                            \
 323           case CNS11643_5_ann:                                                \
 324             buf[0] = 0x25;                                                    \
 325             ch = cns11643_to_ucs4 (&tmp, 3, 0);                               \
 326             break;                                                            \
 327           case CNS11643_6_ann:                                                \
 328             buf[0] = 0x26;                                                    \
 329             ch = cns11643_to_ucs4 (&tmp, 3, 0);                               \
 330             break;                                                            \
 331           case CNS11643_7_ann:                                                \
 332             buf[0] = 0x27;                                                    \
 333             ch = cns11643_to_ucs4 (&tmp, 3, 0);                               \
 334             break;                                                            \
 335           default:                                                            \
 336             /* XXX Currently GB7590 and GB13132 are not supported.  */        \
 337             ch = __UNKNOWN_10646_CHAR;                                        \
 338             break;                                                            \
 339           }                                                                   \
 340         if (ch == __UNKNOWN_10646_CHAR)                                       \
 341           {                                                                   \
 342             STANDARD_FROM_LOOP_ERR_HANDLER (4);                               \
 343           }                                                                   \
 344         assert (tmp == buf + 3);                                              \
 345         inptr += 4;                                                           \
 346       }                                                                       \
 347     else if (set == ASCII_set)                                                \
 348       {                                                                       \
 349         /* Almost done, just advance the input pointer.  */                   \
 350         ++inptr;                                                              \
 351       }                                                                       \
 352     else                                                                      \
 353       {                                                                       \
 354         /* That's pretty easy, we have a dedicated functions for this.  */    \
 355         if (inend - inptr < 2)                                                \
 356           {                                                                   \
 357             result = __GCONV_INCOMPLETE_INPUT;                                \
 358             break;                                                            \
 359           }                                                                   \
 360         if (set == GB2312_set)                                                \
 361           ch = gb2312_to_ucs4 (&inptr, inend - inptr, 0);                     \
 362         else if (set == ISO_IR_165_set)                                       \
 363           ch = isoir165_to_ucs4 (&inptr, inend - inptr);                      \
 364         else                                                                  \
 365           {                                                                   \
 366             assert (set == CNS11643_1_set);                                   \
 367             ch = cns11643l1_to_ucs4 (&inptr, inend - inptr, 0);               \
 368           }                                                                   \
 369                                                                               \
 370         if (ch == 0)                                                          \
 371           {                                                                   \
 372             result = __GCONV_INCOMPLETE_INPUT;                                \
 373             break;                                                            \
 374           }                                                                   \
 375         else if (ch == __UNKNOWN_10646_CHAR)                                  \
 376           {                                                                   \
 377             STANDARD_FROM_LOOP_ERR_HANDLER (2);                               \
 378           }                                                                   \
 379       }                                                                       \
 380                                                                               \
 381     *((uint32_t *) outptr) = ch;                                              \
 382     outptr += sizeof (uint32_t);                                              \
 383   }
 384 #define EXTRA_LOOP_DECLS        , int *setp
 385 #define INIT_PARAMS             int set = (*setp >> 3) & CURRENT_MASK; \
 386                                 int ann = (*setp >> 3) & ~CURRENT_MASK
 387 #define UPDATE_PARAMS           *setp = (set | ann) << 3
 388 #define LOOP_NEED_FLAGS
 389 #include <iconv/loop.c>
 390
 391
 392 /* Next, define the other direction.  */
 393 #define MIN_NEEDED_INPUT        TO_LOOP_MIN_NEEDED_FROM
 394 #define MAX_NEEDED_INPUT        TO_LOOP_MAX_NEEDED_FROM
 395 #define MIN_NEEDED_OUTPUT       TO_LOOP_MIN_NEEDED_TO
 396 #define MAX_NEEDED_OUTPUT       TO_LOOP_MAX_NEEDED_TO
 397 #define LOOPFCT                 TO_LOOP
 398 /* With GCC 5.3 when compiling with -Os the compiler emits a warning
 399    that buf[0] and buf[1] may be used uninitialized.  This can only
 400    happen in the case where tmpbuf[3] is used, and in that case the
 401    write to the tmpbuf[1] and tmpbuf[2] was assured because
 402    ucs4_to_cns11643 would have filled in those entries.  The difficulty
 403    is in getting the compiler to see this logic because tmpbuf[0] is
 404    involved in determining the code page and is the indicator that
 405    tmpbuf[2] is initialized.  */
 406 DIAG_PUSH_NEEDS_COMMENT;
 407 DIAG_IGNORE_Os_NEEDS_COMMENT (5, "-Wmaybe-uninitialized");
 408 #define BODY \
 409   {                                                                           \
 410     uint32_t ch;                                                              \
 411     size_t written = 0;                                                       \
 412                                                                               \
 413     ch = *((const uint32_t *) inptr);                                         \
 414                                                                               \
 415     /* First see whether we can write the character using the currently       \
 416        selected character set.  */                                            \
 417     if (ch < 0x80)                                                            \
 418       {                                                                       \
 419         if (set != ASCII_set)                                                 \
 420           {                                                                   \
 421             *outptr++ = SI;                                                   \
 422             set = ASCII_set;                                                  \
 423             if (outptr == outend)                                             \
 424               {                                                               \
 425                 result = __GCONV_FULL_OUTPUT;                                 \
 426                 break;                                                        \
 427               }                                                               \
 428           }                                                                   \
 429                                                                               \
 430         *outptr++ = ch;                                                       \
 431         written = 1;                                                          \
 432                                                                               \
 433         /* At the end of the line we have to clear the `ann' flags since      \
 434            every line must contain this information again.  */                \
 435         if (ch == L'\n')                                                      \
 436           ann = 0;                                                            \
 437       }                                                                       \
 438     else                                                                      \
 439       {                                                                       \
 440         unsigned char buf[2] = { 0, 0 };                                      \
 441         int used;                                                             \
 442                                                                               \
 443         if (set == GB2312_set || ((ann & SO_ann) != CNS11643_1_ann            \
 444                                   && (ann & SO_ann) != ISO_IR_165_ann))       \
 445           {                                                                   \
 446             written = ucs4_to_gb2312 (ch, buf, 2);                            \
 447             used = GB2312_set;                                                \
 448           }                                                                   \
 449         else if (set == ISO_IR_165_set || (ann & SO_ann) == ISO_IR_165_set)   \
 450           {                                                                   \
 451             written = ucs4_to_isoir165 (ch, buf, 2);                          \
 452             used = ISO_IR_165_set;                                            \
 453           }                                                                   \
 454         else                                                                  \
 455           {                                                                   \
 456             written = ucs4_to_cns11643l1 (ch, buf, 2);                        \
 457             used = CNS11643_1_set;                                            \
 458           }                                                                   \
 459                                                                               \
 460         if (written == __UNKNOWN_10646_CHAR)                                  \
 461           {                                                                   \
 462             /* Cannot convert it using the currently selected SO set.         \
 463                Next try the SS2 set.  */                                      \
 464             written = ucs4_to_cns11643l2 (ch, buf, 2);                        \
 465             if (written != __UNKNOWN_10646_CHAR)                              \
 466               /* Yep, that worked.  */                                        \
 467               used = CNS11643_2_set;                                          \
 468             else                                                              \
 469               {                                                               \
 470                 unsigned char tmpbuf[3];                                      \
 471                                                                               \
 472                 switch (0)                                                    \
 473                   {                                                           \
 474                   default:                                                    \
 475                     /* Well, see whether we have to change the SO set.  */    \
 476                                                                               \
 477                     if (used != GB2312_set)                                   \
 478                       {                                                       \
 479                         written = ucs4_to_gb2312 (ch, buf, 2);                \
 480                         if (written != __UNKNOWN_10646_CHAR)                  \
 481                           {                                                   \
 482                             used = GB2312_set;                                \
 483                             break;                                            \
 484                           }                                                   \
 485                       }                                                       \
 486                                                                               \
 487                     if (used != ISO_IR_165_set)                               \
 488                       {                                                       \
 489                         written = ucs4_to_isoir165 (ch, buf, 2);              \
 490                         if (written != __UNKNOWN_10646_CHAR)                  \
 491                           {                                                   \
 492                             used = ISO_IR_165_set;                            \
 493                             break;                                            \
 494                           }                                                   \
 495                       }                                                       \
 496                                                                               \
 497                     if (used != CNS11643_1_set)                               \
 498                       {                                                       \
 499                         written = ucs4_to_cns11643l1 (ch, buf, 2);            \
 500                         if (written != __UNKNOWN_10646_CHAR)                  \
 501                           {                                                   \
 502                             used = CNS11643_1_set;                            \
 503                             break;                                            \
 504                           }                                                   \
 505                       }                                                       \
 506                                                                               \
 507                     written = ucs4_to_cns11643 (ch, tmpbuf, 3);               \
 508                     if (written == 3 && tmpbuf[0] >= 3 && tmpbuf[0] <= 7)     \
 509                       {                                                       \
 510                         buf[0] = tmpbuf[1];                                   \
 511                         buf[1] = tmpbuf[2];                                   \
 512                         switch (tmpbuf[0])                                    \
 513                           {                                                   \
 514                           case 3:                                             \
 515                             used = CNS11643_3_set;                            \
 516                             break;                                            \
 517                           case 4:                                             \
 518                             used = CNS11643_4_set;                            \
 519                             break;                                            \
 520                           case 5:                                             \
 521                             used = CNS11643_5_set;                            \
 522                             break;                                            \
 523                           case 6:                                             \
 524                             used = CNS11643_6_set;                            \
 525                             break;                                            \
 526                           case 7:                                             \
 527                             used = CNS11643_7_set;                            \
 528                             break;                                            \
 529                           default:                                            \
 530                             abort ();                                         \
 531                           }                                                   \
 532                         written = 2;                                          \
 533                         break;                                                \
 534                       }                                                       \
 535                                                                               \
 536                     /* XXX Currently GB7590 and GB13132 are not supported.  */\
 537                                                                               \
 538                     /* Even this does not work.  Error.  */                   \
 539                     used = ASCII_set;                                         \
 540                   }                                                           \
 541                 if (used == ASCII_set)                                        \
 542                   {                                                           \
 543                     UNICODE_TAG_HANDLER (ch, 4);                              \
 544                     STANDARD_TO_LOOP_ERR_HANDLER (4);                         \
 545                   }                                                           \
 546               }                                                               \
 547           }                                                                   \
 548         assert (written == 2);                                                \
 549                                                                               \
 550         /* See whether we have to emit an escape sequence.  */                \
 551         if (set != used)                                                      \
 552           {                                                                   \
 553             /* First see whether we announced that we use this                \
 554                character set.  */                                             \
 555             if ((used & SO_mask) != 0 && (ann & SO_ann) != (used << 8))       \
 556               {                                                               \
 557                 const char *escseq;                                           \
 558                                                                               \
 559                 if (outptr + 4 > outend)                                      \
 560                   {                                                           \
 561                     result = __GCONV_FULL_OUTPUT;                             \
 562                     break;                                                    \
 563                   }                                                           \
 564                                                                               \
 565                 assert (used >= 1 && used <= 4);                              \
 566                 escseq = ")A\0\0)G)E" + (used - 1) * 2;                       \
 567                 *outptr++ = ESC;                                              \
 568                 *outptr++ = '$';                                              \
 569                 *outptr++ = *escseq++;                                        \
 570                 *outptr++ = *escseq++;                                        \
 571                                                                               \
 572                 ann = (ann & ~SO_ann) | (used << 8);                          \
 573               }                                                               \
 574             else if ((used & SS2_mask) != 0 && (ann & SS2_ann) != (used << 8))\
 575               {                                                               \
 576                 const char *escseq;                                           \
 577                                                                               \
 578                 assert (used == CNS11643_2_set); /* XXX */                    \
 579                 escseq = "*H";                                                \
 580                 *outptr++ = ESC;                                              \
 581                 *outptr++ = '$';                                              \
 582                 *outptr++ = *escseq++;                                        \
 583                 *outptr++ = *escseq++;                                        \
 584                                                                               \
 585                 ann = (ann & ~SS2_ann) | (used << 8);                         \
 586               }                                                               \
 587             else if ((used & SS3_mask) != 0 && (ann & SS3_ann) != (used << 8))\
 588               {                                                               \
 589                 const char *escseq;                                           \
 590                                                                               \
 591                 assert ((used >> 5) >= 3 && (used >> 5) <= 7);                \
 592                 escseq = "+I+J+K+L+M" + ((used >> 5) - 3) * 2;                \
 593                 *outptr++ = ESC;                                              \
 594                 *outptr++ = '$';                                              \
 595                 *outptr++ = *escseq++;                                        \
 596                 *outptr++ = *escseq++;                                        \
 597                                                                               \
 598                 ann = (ann & ~SS3_ann) | (used << 8);                         \
 599               }                                                               \
 600                                                                               \
 601             if (used == CNS11643_2_set)                                       \
 602               {                                                               \
 603                 if (outptr + 2 > outend)                                      \
 604                   {                                                           \
 605                     result = __GCONV_FULL_OUTPUT;                             \
 606                     break;                                                    \
 607                   }                                                           \
 608                 *outptr++ = SS2_0;                                            \
 609                 *outptr++ = SS2_1;                                            \
 610               }                                                               \
 611             else if (used >= CNS11643_3_set && used <= CNS11643_7_set)        \
 612               {                                                               \
 613                 if (outptr + 2 > outend)                                      \
 614                   {                                                           \
 615                     result = __GCONV_FULL_OUTPUT;                             \
 616                     break;                                                    \
 617                   }                                                           \
 618                 *outptr++ = SS3_0;                                            \
 619                 *outptr++ = SS3_1;                                            \
 620               }                                                               \
 621             else                                                              \
 622               {                                                               \
 623                 /* We only have to emit something if currently ASCII is       \
 624                    selected.  Otherwise we are switching within the           \
 625                    SO charset.  */                                            \
 626                 if (set == ASCII_set)                                         \
 627                   {                                                           \
 628                     if (outptr + 1 > outend)                                  \
 629                       {                                                       \
 630                         result = __GCONV_FULL_OUTPUT;                         \
 631                         break;                                                \
 632                       }                                                       \
 633                     *outptr++ = SO;                                           \
 634                   }                                                           \
 635               }                                                               \
 636                                                                               \
 637             /* Always test the length here since we have used up all the      \
 638                guaranteed output buffer slots.  */                            \
 639             if (outptr + 2 > outend)                                          \
 640               {                                                               \
 641                 result = __GCONV_FULL_OUTPUT;                                 \
 642                 break;                                                        \
 643               }                                                               \
 644           }                                                                   \
 645         else if (outptr + 2 > outend)                                         \
 646           {                                                                   \
 647             result = __GCONV_FULL_OUTPUT;                                     \
 648             break;                                                            \
 649           }                                                                   \
 650                                                                               \
 651         *outptr++ = buf[0];                                                   \
 652         *outptr++ = buf[1];                                                   \
 653         set = used;                                                           \
 654       }                                                                       \
 655                                                                               \
 656     /* Now that we wrote the output increment the input pointer.  */          \
 657     inptr += 4;                                                               \
 658   }
 659 DIAG_POP_NEEDS_COMMENT;
 660 #define EXTRA_LOOP_DECLS        , int *setp
 661 #define INIT_PARAMS             int set = (*setp >> 3) & CURRENT_MASK; \
 662                                 int ann = (*setp >> 3) & ~CURRENT_MASK
 663 #define REINIT_PARAMS           do                                            \
 664                                   {                                           \
 665                                     set = (*setp >> 3) & CURRENT_MASK;        \
 666                                     ann = (*setp >> 3) & ~CURRENT_MASK;       \
 667                                   }                                           \
 668                                 while (0)
 669 #define UPDATE_PARAMS           *setp = (set | ann) << 3
 670 #define LOOP_NEED_FLAGS
 671 #include <iconv/loop.c>
 672
 673
 674 /* Now define the toplevel functions.  */
 675 #include <iconv/skeleton.c>