iconvdata/iso-2022-cn-ext.c

   1 /* Conversion module for ISO-2022-CN-EXT.
   2    Copyright (C) 2000-2014 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
  31 #include <assert.h>
  32
  33 /* This makes obvious what everybody knows: 0x1b is the Esc character.  */
  34 #define ESC     0x1b
  35
  36 /* We have single-byte shift-in and shift-out sequences, and the single
  37    shift sequences SS2 and SS3 which replaces the SS2/SS3 designation for
  38    the next two bytes.  */
  39 #define SI      0x0f
  40 #define SO      0x0e
  41 #define SS2_0   ESC
  42 #define SS2_1   0x4e
  43 #define SS3_0   ESC
  44 #define SS3_1   0x4f
  45
  46 /* Definitions used in the body of the `gconv' function.  */
  47 #define CHARSET_NAME            "ISO-2022-CN-EXT//"
  48 #define DEFINE_INIT             1
  49 #define DEFINE_FINI             1
  50 #define FROM_LOOP               from_iso2022cn_ext_loop
  51 #define TO_LOOP                 to_iso2022cn_ext_loop
  52 #define FROM_LOOP_MIN_NEEDED_FROM       1
  53 #define FROM_LOOP_MAX_NEEDED_FROM       4
  54 #define FROM_LOOP_MIN_NEEDED_TO         4
  55 #define FROM_LOOP_MAX_NEEDED_TO         4
  56 #define TO_LOOP_MIN_NEEDED_FROM         4
  57 #define TO_LOOP_MAX_NEEDED_FROM         4
  58 #define TO_LOOP_MIN_NEEDED_TO           1
  59 #define TO_LOOP_MAX_NEEDED_TO           6
  60 #define PREPARE_LOOP \
  61   int save_set;                                                               \
  62   int *setp = &data->__statep->__count;
  63 #define EXTRA_LOOP_ARGS         , setp
  64
  65
  66 /* The charsets GB/T 12345-90, GB 7589-87, GB/T 13131-9X, GB 7590-87,
  67    and GB/T 13132-9X are not registered to the best of my knowledge and
  68    therefore have no escape sequence assigned.  We cannot handle them
  69    for this reason.  Tell the implementation about this.  */
  70 #define X12345  '\0'
  71 #define X7589   '\0'
  72 #define X13131  '\0'
  73 #define X7590   '\0'
  74 #define X13132  '\0'
  75
  76
  77 /* The COUNT element of the state keeps track of the currently selected
  78    character set.  The possible values are:  */
  79 enum
  80 {
  81   ASCII_set = 0,
  82   GB2312_set,
  83   GB12345_set,
  84   CNS11643_1_set,
  85   ISO_IR_165_set,
  86   SO_mask = 7,
  87
  88   GB7589_set = 1 << 3,
  89   GB13131_set = 2 << 3,
  90   CNS11643_2_set = 3 << 3,
  91   SS2_mask = 3 << 3,
  92
  93   GB7590_set = 1 << 5,
  94   GB13132_set = 2 << 5,
  95   CNS11643_3_set = 3 << 5,
  96   CNS11643_4_set = 4 << 5,
  97   CNS11643_5_set = 5 << 5,
  98   CNS11643_6_set = 6 << 5,
  99   CNS11643_7_set = 7 << 5,
 100   SS3_mask = 7 << 5,
 101
 102 #define CURRENT_MASK (SO_mask | SS2_mask | SS3_mask)
 103
 104   GB2312_ann = 1 << 8,
 105   GB12345_ann = 2 << 8,
 106   CNS11643_1_ann = 3 << 8,
 107   ISO_IR_165_ann = 4 << 8,
 108   SO_ann = 7 << 8,
 109
 110   GB7589_ann = 1 << 11,
 111   GB13131_ann = 2 << 11,
 112   CNS11643_2_ann = 3 << 11,
 113   SS2_ann = 3 << 11,
 114
 115   GB7590_ann = 1 << 13,
 116   GB13132_ann = 2 << 13,
 117   CNS11643_3_ann = 3 << 13,
 118   CNS11643_4_ann = 4 << 13,
 119   CNS11643_5_ann = 5 << 13,
 120   CNS11643_6_ann = 6 << 13,
 121   CNS11643_7_ann = 7 << 13,
 122   SS3_ann = 7 << 13
 123 };
 124
 125
 126 /* Since this is a stateful encoding we have to provide code which resets
 127    the output state to the initial state.  This has to be done during the
 128    flushing.  */
 129 #define EMIT_SHIFT_TO_INIT \
 130   if (data->__statep->__count >> 3 != ASCII_set)                              \
 131     {                                                                         \
 132       if (FROM_DIRECTION)                                                     \
 133         /* It's easy, we don't have to emit anything, we just reset the       \
 134            state for the input.  */                                           \
 135         data->__statep->__count = ASCII_set << 3;                             \
 136       else                                                                    \
 137         {                                                                     \
 138           /* We are not in the initial state.  To switch back we have         \
 139              to emit `SI'.  */                                                \
 140           if (__builtin_expect (outbuf == outend, 0))                         \
 141             /* We don't have enough room in the output buffer.  */            \
 142             status = __GCONV_FULL_OUTPUT;                                     \
 143           else                                                                \
 144             {                                                                 \
 145               /* Write out the shift sequence.  */                            \
 146               *outbuf++ = SI;                                                 \
 147               if (data->__flags & __GCONV_IS_LAST)                            \
 148                 *irreversible += 1;                                           \
 149               data->__statep->__count = ASCII_set << 3;                       \
 150             }                                                                 \
 151         }                                                                     \
 152     }
 153
 154
 155 /* Since we might have to reset input pointer we must be able to save
 156    and retore the state.  */
 157 #define SAVE_RESET_STATE(Save) \
 158   if (Save)                                                                   \
 159     save_set = *setp;                                                         \
 160   else                                                                        \
 161     *setp = save_set
 162
 163
 164 /* First define the conversion function from ISO-2022-CN to UCS4.  */
 165 #define MIN_NEEDED_INPUT        FROM_LOOP_MIN_NEEDED_FROM
 166 #define MAX_NEEDED_INPUT        FROM_LOOP_MAX_NEEDED_FROM
 167 #define MIN_NEEDED_OUTPUT       FROM_LOOP_MIN_NEEDED_TO
 168 #define MAX_NEEDED_OUTPUT       FROM_LOOP_MAX_NEEDED_TO
 169 #define LOOPFCT                 FROM_LOOP
 170 #define BODY \
 171   {                                                                           \
 172     uint32_t ch = *inptr;                                                     \
 173                                                                               \
 174     /* This is a 7bit character set, disallow all 8bit characters.  */        \
 175     if (ch > 0x7f)                                                            \
 176       STANDARD_FROM_LOOP_ERR_HANDLER (1);                                     \
 177                                                                               \
 178     /* Recognize escape sequences.  */                                        \
 179     if (ch == ESC)                                                            \
 180       {                                                                       \
 181         /* There are three kinds of escape sequences we have to handle:       \
 182            - those announcing the use of GB and CNS characters on the         \
 183              line; we can simply ignore them                                  \
 184            - the initial byte of the SS2 sequence.                            \
 185            - the initial byte of the SS3 sequence.                            \
 186         */                                                                    \
 187         if (inptr + 2 > inend                                                 \
 188             || (inptr[1] == '$'                                               \
 189                 && (inptr + 3 > inend                                         \
 190                     || (inptr[2] == ')' && inptr + 4 > inend)                 \
 191                     || (inptr[2] == '*' && inptr + 4 > inend)                 \
 192                     || (inptr[2] == '+' && inptr + 4 > inend)))               \
 193             || (inptr[1] == SS2_1 && inptr + 4 > inend)                       \
 194             || (inptr[1] == SS3_1 && inptr + 4 > inend))                      \
 195           {                                                                   \
 196             result = __GCONV_INCOMPLETE_INPUT;                                \
 197             break;                                                            \
 198           }                                                                   \
 199         if (inptr[1] == '$'                                                   \
 200             && ((inptr[2] == ')'                                              \
 201                  && (inptr[3] == 'A'                                          \
 202                      || (X12345 != '\0' && inptr[3] == X12345)                \
 203                      || inptr[3] == 'E' || inptr[3] == 'G'))                  \
 204                 || (inptr[2] == '*'                                           \
 205                     && ((X7589 != '\0' && inptr[3] == X7589)                  \
 206                         || (X13131 != '\0' && inptr[3] == X13131)             \
 207                         || inptr[3] == 'H'))                                  \
 208                 || (inptr[2] == '+'                                           \
 209                     && ((X7590 != '\0' && inptr[3] == X7590)                  \
 210                         || (X13132 != '\0' && inptr[3] == X13132)             \
 211                         || inptr[3] == 'I' || inptr[3] == 'J'                 \
 212                         || inptr[3] == 'K' || inptr[3] == 'L'                 \
 213                         || inptr[3] == 'M'))))                                \
 214           {                                                                   \
 215             /* OK, we accept those character sets.  */                        \
 216             if (inptr[3] == 'A')                                              \
 217               ann = (ann & ~SO_ann) | GB2312_ann;                             \
 218             else if (inptr[3] == 'G')                                         \
 219               ann = (ann & ~SO_ann) | CNS11643_1_ann;                         \
 220             else if (inptr[3] == 'E')                                         \
 221               ann = (ann & ~SO_ann) | ISO_IR_165_ann;                         \
 222             else if (X12345 != '\0' && inptr[3] == X12345)                    \
 223               ann = (ann & ~SO_ann) | GB12345_ann;                            \
 224             else if (inptr[3] == 'H')                                         \
 225               ann = (ann & ~SS2_ann) | CNS11643_2_ann;                        \
 226             else if (X7589 != '\0' && inptr[3] == X7589)                      \
 227               ann = (ann & ~SS2_ann) | GB7589_ann;                            \
 228             else if (X13131 != '\0' && inptr[3] == X13131)                    \
 229               ann = (ann & ~SS2_ann) | GB13131_ann;                           \
 230             else if (inptr[3] == 'I')                                         \
 231               ann = (ann & ~SS3_ann) | CNS11643_3_ann;                        \
 232             else if (inptr[3] == 'J')                                         \
 233               ann = (ann & ~SS3_ann) | CNS11643_4_ann;                        \
 234             else if (inptr[3] == 'K')                                         \
 235               ann = (ann & ~SS3_ann) | CNS11643_5_ann;                        \
 236             else if (inptr[3] == 'L')                                         \
 237               ann = (ann & ~SS3_ann) | CNS11643_6_ann;                        \
 238             else if (inptr[3] == 'M')                                         \
 239               ann = (ann & ~SS3_ann) | CNS11643_7_ann;                        \
 240             else if (X7590 != '\0' && inptr[3] == X7590)                      \
 241               ann = (ann & ~SS3_ann) | GB7590_ann;                            \
 242             else if (X13132 != '\0' && inptr[3] == X13132)                    \
 243               ann = (ann & ~SS3_ann) | GB13132_ann;                           \
 244             inptr += 4;                                                       \
 245             continue;                                                         \
 246           }                                                                   \
 247       }                                                                       \
 248     else if (ch == SO)                                                        \
 249       {                                                                       \
 250         /* Switch to use GB2312, GB12345, CNS 11643 plane 1, or ISO-IR-165,   \
 251            depending on which S0 designation came last.  The only problem     \
 252            is what to do with faulty input files where no designator came.    \
 253            XXX For now I'll default to use GB2312.  If this is not the        \
 254            best behavior (e.g., we should flag an error) let me know.  */     \
 255         ++inptr;                                                              \
 256         if ((ann & SO_ann) != 0)                                              \
 257           switch (ann & SO_ann)                                               \
 258             {                                                                 \
 259             case GB2312_ann:                                                  \
 260               set = GB2312_set;                                               \
 261               break;                                                          \
 262             case GB12345_ann:                                                 \
 263               set = GB12345_set;                                              \
 264               break;                                                          \
 265             case CNS11643_1_ann:                                              \
 266               set = CNS11643_1_set;                                           \
 267               break;                                                          \
 268             case ISO_IR_165_ann:                                              \
 269               set = ISO_IR_165_set;                                           \
 270               break;                                                          \
 271             default:                                                          \
 272               abort ();                                                       \
 273             }                                                                 \
 274         else                                                                  \
 275           {                                                                   \
 276             STANDARD_FROM_LOOP_ERR_HANDLER (1);                               \
 277           }                                                                   \
 278         continue;                                                             \
 279       }                                                                       \
 280     else if (ch == SI)                                                        \
 281       {                                                                       \
 282         /* Switch to use ASCII.  */                                           \
 283         ++inptr;                                                              \
 284         set = ASCII_set;                                                      \
 285         continue;                                                             \
 286       }                                                                       \
 287                                                                               \
 288     if (ch == ESC && inptr[1] == SS2_1)                                       \
 289       {                                                                       \
 290         /* This is a character from CNS 11643 plane 2.                        \
 291            XXX We could test here whether the use of this character           \
 292            set was announced.                                                 \
 293            XXX Currently GB7589 and GB13131 are not supported.  */            \
 294         inptr += 2;                                                           \
 295         ch = cns11643l2_to_ucs4 (&inptr, 2, 0);                               \
 296         if (ch == __UNKNOWN_10646_CHAR)                                       \
 297           STANDARD_FROM_LOOP_ERR_HANDLER (2);                                 \
 298       }                                                                       \
 299     /* Note that we can assume here that at least 4 bytes are available if    \
 300        the first byte is ESC since otherwise the first if would have been     \
 301        true.  */                                                              \
 302     else if (ch == ESC && inptr[1] == SS3_1)                                  \
 303       {                                                                       \
 304         /* This is a character from CNS 11643 plane 3 or higher.              \
 305            XXX Currently GB7590 and GB13132 are not supported.  */            \
 306         unsigned char buf[3];                                                 \
 307         const unsigned char *tmp = buf;                                       \
 308                                                                               \
 309         buf[1] = inptr[2];                                                    \
 310         buf[2] = inptr[3];                                                    \
 311         switch (ann & SS3_ann)                                                \
 312           {                                                                   \
 313           case CNS11643_3_ann:                                                \
 314             buf[0] = 0x23;                                                    \
 315             ch = cns11643_to_ucs4 (&tmp, 3, 0);                               \
 316             break;                                                            \
 317           case CNS11643_4_ann:                                                \
 318             buf[0] = 0x24;                                                    \
 319             ch = cns11643_to_ucs4 (&tmp, 3, 0);                               \
 320             break;                                                            \
 321           case CNS11643_5_ann:                                                \
 322             buf[0] = 0x25;                                                    \
 323             ch = cns11643_to_ucs4 (&tmp, 3, 0);                               \
 324             break;                                                            \
 325           case CNS11643_6_ann:                                                \
 326             buf[0] = 0x26;                                                    \
 327             ch = cns11643_to_ucs4 (&tmp, 3, 0);                               \
 328             break;                                                            \
 329           case CNS11643_7_ann:                                                \
 330             buf[0] = 0x27;                                                    \
 331             ch = cns11643_to_ucs4 (&tmp, 3, 0);                               \
 332             break;                                                            \
 333           default:                                                            \
 334             /* XXX Currently GB7590 and GB13132 are not supported.  */        \
 335             ch = __UNKNOWN_10646_CHAR;                                        \
 336             break;                                                            \
 337           }                                                                   \
 338         if (ch == __UNKNOWN_10646_CHAR)                                       \
 339           {                                                                   \
 340             STANDARD_FROM_LOOP_ERR_HANDLER (4);                               \
 341           }                                                                   \
 342         assert (tmp == buf + 3);                                              \
 343         inptr += 4;                                                           \
 344       }                                                                       \
 345     else if (set == ASCII_set)                                                \
 346       {                                                                       \
 347         /* Almost done, just advance the input pointer.  */                   \
 348         ++inptr;                                                              \
 349       }                                                                       \
 350     else                                                                      \
 351       {                                                                       \
 352         /* That's pretty easy, we have a dedicated functions for this.  */    \
 353         if (inend - inptr < 2)                                                \
 354           {                                                                   \
 355             result = __GCONV_INCOMPLETE_INPUT;                                \
 356             break;                                                            \
 357           }                                                                   \
 358         if (set == GB2312_set)                                                \
 359           ch = gb2312_to_ucs4 (&inptr, inend - inptr, 0);                     \
 360         else if (set == ISO_IR_165_set)                                       \
 361           ch = isoir165_to_ucs4 (&inptr, inend - inptr);                      \
 362         else                                                                  \
 363           {                                                                   \
 364             assert (set == CNS11643_1_set);                                   \
 365             ch = cns11643l1_to_ucs4 (&inptr, inend - inptr, 0);               \
 366           }                                                                   \
 367                                                                               \
 368         if (ch == 0)                                                          \
 369           {                                                                   \
 370             result = __GCONV_INCOMPLETE_INPUT;                                \
 371             break;                                                            \
 372           }                                                                   \
 373         else if (ch == __UNKNOWN_10646_CHAR)                                  \
 374           {                                                                   \
 375             STANDARD_FROM_LOOP_ERR_HANDLER (2);                               \
 376           }                                                                   \
 377       }                                                                       \
 378                                                                               \
 379     *((uint32_t *) outptr) = ch;                                              \
 380     outptr += sizeof (uint32_t);                                              \
 381   }
 382 #define EXTRA_LOOP_DECLS        , int *setp
 383 #define INIT_PARAMS             int set = (*setp >> 3) & CURRENT_MASK; \
 384                                 int ann = (*setp >> 3) & ~CURRENT_MASK
 385 #define UPDATE_PARAMS           *setp = (set | ann) << 3
 386 #define LOOP_NEED_FLAGS
 387 #include <iconv/loop.c>
 388
 389
 390 /* Next, define the other direction.  */
 391 #define MIN_NEEDED_INPUT        TO_LOOP_MIN_NEEDED_FROM
 392 #define MAX_NEEDED_INPUT        TO_LOOP_MAX_NEEDED_FROM
 393 #define MIN_NEEDED_OUTPUT       TO_LOOP_MIN_NEEDED_TO
 394 #define MAX_NEEDED_OUTPUT       TO_LOOP_MAX_NEEDED_TO
 395 #define LOOPFCT                 TO_LOOP
 396 #define BODY \
 397   {                                                                           \
 398     uint32_t ch;                                                              \
 399     size_t written = 0;                                                       \
 400                                                                               \
 401     ch = *((const uint32_t *) inptr);                                         \
 402                                                                               \
 403     /* First see whether we can write the character using the currently       \
 404        selected character set.  */                                            \
 405     if (ch < 0x80)                                                            \
 406       {                                                                       \
 407         if (set != ASCII_set)                                                 \
 408           {                                                                   \
 409             *outptr++ = SI;                                                   \
 410             set = ASCII_set;                                                  \
 411             if (outptr == outend)                                             \
 412               {                                                               \
 413                 result = __GCONV_FULL_OUTPUT;                                 \
 414                 break;                                                        \
 415               }                                                               \
 416           }                                                                   \
 417                                                                               \
 418         *outptr++ = ch;                                                       \
 419         written = 1;                                                          \
 420                                                                               \
 421         /* At the end of the line we have to clear the `ann' flags since      \
 422            every line must contain this information again.  */                \
 423         if (ch == L'\n')                                                      \
 424           ann = 0;                                                            \
 425       }                                                                       \
 426     else                                                                      \
 427       {                                                                       \
 428         unsigned char buf[2];                                                 \
 429         int used;                                                             \
 430                                                                               \
 431         if (set == GB2312_set || ((ann & SO_ann) != CNS11643_1_ann            \
 432                                   && (ann & SO_ann) != ISO_IR_165_ann))       \
 433           {                                                                   \
 434             written = ucs4_to_gb2312 (ch, buf, 2);                            \
 435             used = GB2312_set;                                                \
 436           }                                                                   \
 437         else if (set == ISO_IR_165_set || (ann & SO_ann) == ISO_IR_165_set)   \
 438           {                                                                   \
 439             written = ucs4_to_isoir165 (ch, buf, 2);                          \
 440             used = ISO_IR_165_set;                                            \
 441           }                                                                   \
 442         else                                                                  \
 443           {                                                                   \
 444             written = ucs4_to_cns11643l1 (ch, buf, 2);                        \
 445             used = CNS11643_1_set;                                            \
 446           }                                                                   \
 447                                                                               \
 448         if (written == __UNKNOWN_10646_CHAR)                                  \
 449           {                                                                   \
 450             /* Cannot convert it using the currently selected SO set.         \
 451                Next try the SS2 set.  */                                      \
 452             written = ucs4_to_cns11643l2 (ch, buf, 2);                        \
 453             if (written != __UNKNOWN_10646_CHAR)                              \
 454               /* Yep, that worked.  */                                        \
 455               used = CNS11643_2_set;                                          \
 456             else                                                              \
 457               {                                                               \
 458                 unsigned char tmpbuf[3];                                      \
 459                                                                               \
 460                 switch (0)                                                    \
 461                   {                                                           \
 462                   default:                                                    \
 463                     /* Well, see whether we have to change the SO set.  */    \
 464                                                                               \
 465                     if (used != GB2312_set)                                   \
 466                       {                                                       \
 467                         written = ucs4_to_gb2312 (ch, buf, 2);                \
 468                         if (written != __UNKNOWN_10646_CHAR)                  \
 469                           {                                                   \
 470                             used = GB2312_set;                                \
 471                             break;                                            \
 472                           }                                                   \
 473                       }                                                       \
 474                                                                               \
 475                     if (used != ISO_IR_165_set)                               \
 476                       {                                                       \
 477                         written = ucs4_to_isoir165 (ch, buf, 2);              \
 478                         if (written != __UNKNOWN_10646_CHAR)                  \
 479                           {                                                   \
 480                             used = ISO_IR_165_set;                            \
 481                             break;                                            \
 482                           }                                                   \
 483                       }                                                       \
 484                                                                               \
 485                     if (used != CNS11643_1_set)                               \
 486                       {                                                       \
 487                         written = ucs4_to_cns11643l1 (ch, buf, 2);            \
 488                         if (written != __UNKNOWN_10646_CHAR)                  \
 489                           {                                                   \
 490                             used = CNS11643_1_set;                            \
 491                             break;                                            \
 492                           }                                                   \
 493                       }                                                       \
 494                                                                               \
 495                     written = ucs4_to_cns11643 (ch, tmpbuf, 3);               \
 496                     if (written == 3 && tmpbuf[0] >= 3 && tmpbuf[0] <= 7)     \
 497                       {                                                       \
 498                         buf[0] = tmpbuf[1];                                   \
 499                         buf[1] = tmpbuf[2];                                   \
 500                         switch (tmpbuf[0])                                    \
 501                           {                                                   \
 502                           case 3:                                             \
 503                             used = CNS11643_3_set;                            \
 504                             break;                                            \
 505                           case 4:                                             \
 506                             used = CNS11643_4_set;                            \
 507                             break;                                            \
 508                           case 5:                                             \
 509                             used = CNS11643_5_set;                            \
 510                             break;                                            \
 511                           case 6:                                             \
 512                             used = CNS11643_6_set;                            \
 513                             break;                                            \
 514                           case 7:                                             \
 515                             used = CNS11643_7_set;                            \
 516                             break;                                            \
 517                           default:                                            \
 518                             abort ();                                         \
 519                           }                                                   \
 520                         written = 2;                                          \
 521                         break;                                                \
 522                       }                                                       \
 523                                                                               \
 524                     /* XXX Currently GB7590 and GB13132 are not supported.  */\
 525                                                                               \
 526                     /* Even this does not work.  Error.  */                   \
 527                     used = ASCII_set;                                         \
 528                   }                                                           \
 529                 if (used == ASCII_set)                                        \
 530                   {                                                           \
 531                     UNICODE_TAG_HANDLER (ch, 4);                              \
 532                     STANDARD_TO_LOOP_ERR_HANDLER (4);                         \
 533                   }                                                           \
 534               }                                                               \
 535           }                                                                   \
 536         assert (written == 2);                                                \
 537                                                                               \
 538         /* See whether we have to emit an escape sequence.  */                \
 539         if (set != used)                                                      \
 540           {                                                                   \
 541             /* First see whether we announced that we use this                \
 542                character set.  */                                             \
 543             if ((used & SO_mask) != 0 && (ann & SO_ann) != (used << 8))       \
 544               {                                                               \
 545                 const char *escseq;                                           \
 546                                                                               \
 547                 if (outptr + 4 > outend)                                      \
 548                   {                                                           \
 549                     result = __GCONV_FULL_OUTPUT;                             \
 550                     break;                                                    \
 551                   }                                                           \
 552                                                                               \
 553                 assert (used >= 1 && used <= 4);                              \
 554                 escseq = ")A\0\0)G)E" + (used - 1) * 2;                       \
 555                 *outptr++ = ESC;                                              \
 556                 *outptr++ = '$';                                              \
 557                 *outptr++ = *escseq++;                                        \
 558                 *outptr++ = *escseq++;                                        \
 559                                                                               \
 560                 ann = (ann & ~SO_ann) | (used << 8);                          \
 561               }                                                               \
 562             else if ((used & SS2_mask) != 0 && (ann & SS2_ann) != (used << 8))\
 563               {                                                               \
 564                 const char *escseq;                                           \
 565                                                                               \
 566                 assert (used == CNS11643_2_set); /* XXX */                    \
 567                 escseq = "*H";                                                \
 568                 *outptr++ = ESC;                                              \
 569                 *outptr++ = '$';                                              \
 570                 *outptr++ = *escseq++;                                        \
 571                 *outptr++ = *escseq++;                                        \
 572                                                                               \
 573                 ann = (ann & ~SS2_ann) | (used << 8);                         \
 574               }                                                               \
 575             else if ((used & SS3_mask) != 0 && (ann & SS3_ann) != (used << 8))\
 576               {                                                               \
 577                 const char *escseq;                                           \
 578                                                                               \
 579                 assert ((used >> 5) >= 3 && (used >> 5) <= 7);                \
 580                 escseq = "+I+J+K+L+M" + ((used >> 5) - 3) * 2;                \
 581                 *outptr++ = ESC;                                              \
 582                 *outptr++ = '$';                                              \
 583                 *outptr++ = *escseq++;                                        \
 584                 *outptr++ = *escseq++;                                        \
 585                                                                               \
 586                 ann = (ann & ~SS3_ann) | (used << 8);                         \
 587               }                                                               \
 588                                                                               \
 589             if (used == CNS11643_2_set)                                       \
 590               {                                                               \
 591                 if (outptr + 2 > outend)                                      \
 592                   {                                                           \
 593                     result = __GCONV_FULL_OUTPUT;                             \
 594                     break;                                                    \
 595                   }                                                           \
 596                 *outptr++ = SS2_0;                                            \
 597                 *outptr++ = SS2_1;                                            \
 598               }                                                               \
 599             else if (used >= CNS11643_3_set && used <= CNS11643_7_set)        \
 600               {                                                               \
 601                 if (outptr + 2 > outend)                                      \
 602                   {                                                           \
 603                     result = __GCONV_FULL_OUTPUT;                             \
 604                     break;                                                    \
 605                   }                                                           \
 606                 *outptr++ = SS3_0;                                            \
 607                 *outptr++ = SS3_1;                                            \
 608               }                                                               \
 609             else                                                              \
 610               {                                                               \
 611                 /* We only have to emit something if currently ASCII is       \
 612                    selected.  Otherwise we are switching within the           \
 613                    SO charset.  */                                            \
 614                 if (set == ASCII_set)                                         \
 615                   {                                                           \
 616                     if (outptr + 1 > outend)                                  \
 617                       {                                                       \
 618                         result = __GCONV_FULL_OUTPUT;                         \
 619                         break;                                                \
 620                       }                                                       \
 621                     *outptr++ = SO;                                           \
 622                   }                                                           \
 623               }                                                               \
 624                                                                               \
 625             /* Always test the length here since we have used up all the      \
 626                guaranteed output buffer slots.  */                            \
 627             if (outptr + 2 > outend)                                          \
 628               {                                                               \
 629                 result = __GCONV_FULL_OUTPUT;                                 \
 630                 break;                                                        \
 631               }                                                               \
 632           }                                                                   \
 633         else if (outptr + 2 > outend)                                         \
 634           {                                                                   \
 635             result = __GCONV_FULL_OUTPUT;                                     \
 636             break;                                                            \
 637           }                                                                   \
 638                                                                               \
 639         *outptr++ = buf[0];                                                   \
 640         *outptr++ = buf[1];                                                   \
 641         set = used;                                                           \
 642       }                                                                       \
 643                                                                               \
 644     /* Now that we wrote the output increment the input pointer.  */          \
 645     inptr += 4;                                                               \
 646   }
 647 #define EXTRA_LOOP_DECLS        , int *setp
 648 #define INIT_PARAMS             int set = (*setp >> 3) & CURRENT_MASK; \
 649                                 int ann = (*setp >> 3) & ~CURRENT_MASK
 650 #define REINIT_PARAMS           do                                            \
 651                                   {                                           \
 652                                     set = (*setp >> 3) & CURRENT_MASK;        \
 653                                     ann = (*setp >> 3) & ~CURRENT_MASK;       \
 654                                   }                                           \
 655                                 while (0)
 656 #define UPDATE_PARAMS           *setp = (set | ann) << 3
 657 #define LOOP_NEED_FLAGS
 658 #include <iconv/loop.c>
 659
 660
 661 /* Now define the toplevel functions.  */
 662 #include <iconv/skeleton.c>