iconvdata/iso8859-1.c

   1 /* Conversion to and from ISO 8859-1.
   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 /* Definitions used in the body of the `gconv' function.  */
  23 #define CHARSET_NAME            "ISO-8859-1//"
  24 #define FROM_LOOP               from_iso8859_1
  25 #define TO_LOOP                 to_iso8859_1
  26 #define DEFINE_INIT             1
  27 #define DEFINE_FINI             1
  28 #define MIN_NEEDED_FROM         1
  29 #define MIN_NEEDED_TO           4
  30 #define ONE_DIRECTION           0
  31
  32 /* First define the conversion function from ISO 8859-1 to UCS4.  */
  33 #define MIN_NEEDED_INPUT        MIN_NEEDED_FROM
  34 #define MIN_NEEDED_OUTPUT       MIN_NEEDED_TO
  35 #define LOOPFCT                 FROM_LOOP
  36 #define BODY \
  37   *((uint32_t *) outptr) = *inptr++;                                          \
  38   outptr += sizeof (uint32_t);
  39 #define ONEBYTE_BODY \
  40   {                                                                           \
  41     return c;                                                                 \
  42   }
  43 #include <iconv/loop.c>
  44
  45
  46 /* Next, define the other direction.  */
  47 #define MIN_NEEDED_INPUT        MIN_NEEDED_TO
  48 #define MIN_NEEDED_OUTPUT       MIN_NEEDED_FROM
  49 #define LOOPFCT                 TO_LOOP
  50 #define BODY \
  51   {                                                                           \
  52     uint32_t ch = *((const uint32_t *) inptr);                                \
  53     if (__glibc_unlikely (ch > 0xff))                                         \
  54       {                                                                       \
  55         UNICODE_TAG_HANDLER (ch, 4);                                          \
  56                                                                               \
  57         /* We have an illegal character.  */                                  \
  58         STANDARD_TO_LOOP_ERR_HANDLER (4);                                     \
  59       }                                                                       \
  60     else                                                                      \
  61       *outptr++ = (unsigned char) ch;                                         \
  62     inptr += 4;                                                               \
  63   }
  64 #define LOOP_NEED_FLAGS
  65 #include <iconv/loop.c>
  66
  67
  68 /* Now define the toplevel functions.  */
  69 #include <iconv/skeleton.c>