iconvdata/8bit-generic.c

   1 /* Generic conversion to and from 8bit charsets.
   2    Copyright (C) 1997-2024 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <dlfcn.h>
  20 #include <stdint.h>
  21
  22 #define FROM_LOOP               from_generic
  23 #define TO_LOOP                 to_generic
  24 #define DEFINE_INIT             1
  25 #define DEFINE_FINI             1
  26 #define MIN_NEEDED_FROM         1
  27 #define MIN_NEEDED_TO           4
  28 #define ONE_DIRECTION           0
  29
  30
  31 /* First define the conversion function from the 8bit charset to UCS4.  */
  32 #define MIN_NEEDED_INPUT        MIN_NEEDED_FROM
  33 #define MIN_NEEDED_OUTPUT       MIN_NEEDED_TO
  34 #define LOOPFCT                 FROM_LOOP
  35 #define BODY \
  36   {                                                                           \
  37     uint32_t ch = to_ucs4[*inptr];                                            \
  38                                                                               \
  39     if (HAS_HOLES && __builtin_expect (ch == L'\0', 0) && *inptr != '\0')     \
  40       {                                                                       \
  41         /* This is an illegal character.  */                                  \
  42         STANDARD_FROM_LOOP_ERR_HANDLER (1);                                   \
  43       }                                                                       \
  44                                                                               \
  45     put32 (outptr, ch);                                                       \
  46     outptr += 4;                                                              \
  47     ++inptr;                                                                  \
  48   }
  49 #define LOOP_NEED_FLAGS
  50 #define ONEBYTE_BODY \
  51   {                                                                           \
  52     uint32_t ch = to_ucs4[c];                                                 \
  53                                                                               \
  54     if (HAS_HOLES && __builtin_expect (ch == L'\0', 0) && c != '\0')          \
  55       return WEOF;                                                            \
  56     else                                                                      \
  57       return ch;                                                              \
  58   }
  59 #include <iconv/loop.c>
  60
  61
  62 /* Next, define the other direction.  */
  63 #define MIN_NEEDED_INPUT        MIN_NEEDED_TO
  64 #define MIN_NEEDED_OUTPUT       MIN_NEEDED_FROM
  65 #define LOOPFCT                 TO_LOOP
  66 #define BODY \
  67   {                                                                           \
  68     uint32_t ch = get32 (inptr);                                              \
  69                                                                               \
  70     if (__builtin_expect (ch >= sizeof (from_ucs4) / sizeof (from_ucs4[0]), 0)\
  71         || (__builtin_expect (from_ucs4[ch], '\1') == '\0' && ch != 0))       \
  72       {                                                                       \
  73         UNICODE_TAG_HANDLER (ch, 4);                                          \
  74                                                                               \
  75         /* This is an illegal character.  */                                  \
  76         STANDARD_TO_LOOP_ERR_HANDLER (4);                                     \
  77       }                                                                       \
  78                                                                               \
  79     *outptr++ = from_ucs4[ch];                                                \
  80     inptr += 4;                                                               \
  81   }
  82 #define LOOP_NEED_FLAGS
  83 #include <iconv/loop.c>
  84
  85
  86 /* Now define the toplevel functions.  */
  87 #include <iconv/skeleton.c>