iconvdata/8bit-gap.c

   1 /* Generic conversion to and from 8bit charsets,
   2    converting from UCS using gaps.
   3    Copyright (C) 1997-1999, 2000-2002 Free Software Foundation, Inc.
   4    This file is part of the GNU C Library.
   5    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
   6
   7    The GNU C Library is free software; you can redistribute it and/or
   8    modify it under the terms of the GNU Lesser General Public
   9    License as published by the Free Software Foundation; either
  10    version 2.1 of the License, or (at your option) any later version.
  11
  12    The GNU C Library is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15    Lesser General Public License for more details.
  16
  17    You should have received a copy of the GNU Lesser General Public
  18    License along with the GNU C Library; if not, write to the Free
  19    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  20    02111-1307 USA.  */
  21
  22 #include <dlfcn.h>
  23 #include <stdint.h>
  24
  25 struct gap
  26 {
  27   uint16_t start;
  28   uint16_t end;
  29   int32_t idx;
  30 };
  31
  32 /* Now we can include the tables.  */
  33 #include TABLES
  34
  35
  36 #define FROM_LOOP               from_gap
  37 #define TO_LOOP                 to_gap
  38 #define DEFINE_INIT             1
  39 #define DEFINE_FINI             1
  40 #define MIN_NEEDED_FROM         1
  41 #define MIN_NEEDED_TO           4
  42
  43
  44 /* First define the conversion function from the 8bit charset to UCS4.  */
  45 #define MIN_NEEDED_INPUT        MIN_NEEDED_FROM
  46 #define MIN_NEEDED_OUTPUT       MIN_NEEDED_TO
  47 #define LOOPFCT                 FROM_LOOP
  48 #define BODY \
  49   {                                                                           \
  50     uint32_t ch = to_ucs4[*inptr];                                            \
  51                                                                               \
  52     if (HAS_HOLES && __builtin_expect (ch, L'\1') == L'\0' && *inptr != '\0') \
  53       {                                                                       \
  54         /* This is an illegal character.  */                                  \
  55         STANDARD_FROM_LOOP_ERR_HANDLER (1);                                   \
  56       }                                                                       \
  57     else                                                                      \
  58       {                                                                       \
  59         put32 (outptr, ch);                                                   \
  60         outptr += 4;                                                          \
  61       }                                                                       \
  62                                                                               \
  63     ++inptr;                                                                  \
  64   }
  65 #define LOOP_NEED_FLAGS
  66 #include <iconv/loop.c>
  67
  68
  69 /* Next, define the other direction.  */
  70 #define MIN_NEEDED_INPUT        MIN_NEEDED_TO
  71 #define MIN_NEEDED_OUTPUT       MIN_NEEDED_FROM
  72 #define LOOPFCT                 TO_LOOP
  73 #define BODY \
  74   {                                                                           \
  75     const struct gap *rp = from_idx;                                          \
  76     uint32_t ch = get32 (inptr);                                              \
  77     unsigned char res;                                                        \
  78                                                                               \
  79     if (__builtin_expect (ch >= 0xffff, 0))                                   \
  80       {                                                                       \
  81         UNICODE_TAG_HANDLER (ch, 4);                                          \
  82         rp = NULL;                                                            \
  83       }                                                                       \
  84     else                                                                      \
  85       while (ch > rp->end)                                                    \
  86         ++rp;                                                                 \
  87     if (__builtin_expect (rp == NULL, 0)                                      \
  88         || __builtin_expect (ch < rp->start, 0)                               \
  89         || (res = from_ucs4[ch + rp->idx],                                    \
  90             __builtin_expect (res, '\1') == '\0' && ch != 0))                 \
  91       {                                                                       \
  92         /* This is an illegal character.  */                                  \
  93         STANDARD_TO_LOOP_ERR_HANDLER (4);                                     \
  94       }                                                                       \
  95                                                                               \
  96     *outptr++ = res;                                                          \
  97     inptr += 4;                                                               \
  98   }
  99 #define LOOP_NEED_FLAGS
 100 #include <iconv/loop.c>
 101
 102
 103 /* Now define the toplevel functions.  */
 104 #include <iconv/skeleton.c>