iconvdata/8bit-generic.c

   1 /* Generic conversion to and from 8bit charsets.
   2    Copyright (C) 1997-2021 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
   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    <https://www.gnu.org/licenses/>.  */
  19
  20 #include <dlfcn.h>
  21 #include <stdint.h>
  22
  23 #define FROM_LOOP               from_generic
  24 #define TO_LOOP                 to_generic
  25 #define DEFINE_INIT             1
  26 #define DEFINE_FINI             1
  27 #define MIN_NEEDED_FROM         1
  28 #define MIN_NEEDED_TO           4
  29 #define ONE_DIRECTION           0
  30
  31
  32 /* First define the conversion function from the 8bit charset 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   {                                                                           \
  38     uint32_t ch = to_ucs4[*inptr];                                            \
  39                                                                               \
  40     if (HAS_HOLES && __builtin_expect (ch == L'\0', 0) && *inptr != '\0')     \
  41       {                                                                       \
  42         /* This is an illegal character.  */                                  \
  43         STANDARD_FROM_LOOP_ERR_HANDLER (1);                                   \
  44       }                                                                       \
  45                                                                               \
  46     put32 (outptr, ch);                                                       \
  47     outptr += 4;                                                              \
  48     ++inptr;                                                                  \
  49   }
  50 #define LOOP_NEED_FLAGS
  51 #define ONEBYTE_BODY \
  52   {                                                                           \
  53     uint32_t ch = to_ucs4[c];                                                 \
  54                                                                               \
  55     if (HAS_HOLES && __builtin_expect (ch == L'\0', 0) && c != '\0')          \
  56       return WEOF;                                                            \
  57     else                                                                      \
  58       return ch;                                                              \
  59   }
  60 #include <iconv/loop.c>
  61
  62
  63 /* Next, define the other direction.  */
  64 #define MIN_NEEDED_INPUT        MIN_NEEDED_TO
  65 #define MIN_NEEDED_OUTPUT       MIN_NEEDED_FROM
  66 #define LOOPFCT                 TO_LOOP
  67 #define BODY \
  68   {                                                                           \
  69     uint32_t ch = get32 (inptr);                                              \
  70                                                                               \
  71     if (__builtin_expect (ch >= sizeof (from_ucs4) / sizeof (from_ucs4[0]), 0)\
  72         || (__builtin_expect (from_ucs4[ch], '\1') == '\0' && ch != 0))       \
  73       {                                                                       \
  74         UNICODE_TAG_HANDLER (ch, 4);                                          \
  75                                                                               \
  76         /* This is an illegal character.  */                                  \
  77         STANDARD_TO_LOOP_ERR_HANDLER (4);                                     \
  78       }                                                                       \
  79                                                                               \
  80     *outptr++ = from_ucs4[ch];                                                \
  81     inptr += 4;                                                               \
  82   }
  83 #define LOOP_NEED_FLAGS
  84 #include <iconv/loop.c>
  85
  86
  87 /* Now define the toplevel functions.  */
  88 #include <iconv/skeleton.c>