iconvdata/8bit-gap.c

   1 /* Generic conversion to and from 8bit charsets,
   2    converting from UCS using gaps.
   3    Copyright (C) 1997, 1998, 1999, 2000 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 Library General Public License as
   9    published by the Free Software Foundation; either version 2 of the
  10    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    Library General Public License for more details.
  16
  17    You should have received a copy of the GNU Library General Public
  18    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  19    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  20    Boston, MA 02111-1307, USA.  */
  21
  22 #include <stdint.h>
  23
  24 struct gap
  25 {
  26   uint16_t start;
  27   uint16_t end;
  28   int32_t idx;
  29 };
  30
  31 /* Now we can include the tables.  */
  32 #include TABLES
  33
  34
  35 #define FROM_LOOP               from_gap
  36 #define TO_LOOP                 to_gap
  37 #define DEFINE_INIT             1
  38 #define DEFINE_FINI             1
  39 #define MIN_NEEDED_FROM         1
  40 #define MIN_NEEDED_TO           4
  41
  42
  43 /* First define the conversion function from the 8bit charset to UCS4.  */
  44 #define MIN_NEEDED_INPUT        MIN_NEEDED_FROM
  45 #define MIN_NEEDED_OUTPUT       MIN_NEEDED_TO
  46 #define LOOPFCT                 FROM_LOOP
  47 #define BODY \
  48   {                                                                           \
  49     uint32_t ch = to_ucs4[*inptr];                                            \
  50                                                                               \
  51     if (HAS_HOLES && __builtin_expect (ch, L'\1') == L'\0' && *inptr != '\0') \
  52       {                                                                       \
  53         /* This is an illegal character.  */                                  \
  54         if (! ignore_errors_p ())                                             \
  55           {                                                                   \
  56             result = __GCONV_ILLEGAL_INPUT;                                   \
  57             break;                                                            \
  58           }                                                                   \
  59                                                                               \
  60         ++*irreversible;                                                      \
  61       }                                                                       \
  62     else                                                                      \
  63       {                                                                       \
  64         put32 (outptr, ch);                                                   \
  65         outptr += 4;                                                          \
  66       }                                                                       \
  67                                                                               \
  68     ++inptr;                                                                  \
  69   }
  70 #include <iconv/loop.c>
  71
  72
  73 /* Next, define the other direction.  */
  74 #define MIN_NEEDED_INPUT        MIN_NEEDED_TO
  75 #define MIN_NEEDED_OUTPUT       MIN_NEEDED_FROM
  76 #define LOOPFCT                 TO_LOOP
  77 #define BODY \
  78   {                                                                           \
  79     const struct gap *rp = from_idx;                                          \
  80     uint32_t ch = get32 (inptr);                                              \
  81     unsigned char res;                                                        \
  82                                                                               \
  83     if (__builtin_expect (ch, 0) >= 0xffff)                                   \
  84       {                                                                       \
  85         /* This is an illegal character.  */                                  \
  86         if (! ignore_errors_p ())                                             \
  87           {                                                                   \
  88             result = __GCONV_ILLEGAL_INPUT;                                   \
  89             break;                                                            \
  90           }                                                                   \
  91                                                                               \
  92         ++*irreversible;                                                      \
  93         inptr += 4;                                                           \
  94         continue;                                                             \
  95       }                                                                       \
  96     while (ch > rp->end)                                                      \
  97       ++rp;                                                                   \
  98     if (__builtin_expect (ch < rp->start, 0))                                 \
  99       {                                                                       \
 100         /* This is an illegal character.  */                                  \
 101         if (! ignore_errors_p ())                                             \
 102           {                                                                   \
 103             result = __GCONV_ILLEGAL_INPUT;                                   \
 104             break;                                                            \
 105           }                                                                   \
 106                                                                               \
 107         ++*irreversible;                                                      \
 108         inptr += 4;                                                           \
 109         continue;                                                             \
 110       }                                                                       \
 111                                                                               \
 112     res = from_ucs4[ch + rp->idx];                                            \
 113     if (__builtin_expect (res, '\1') == '\0' && ch != 0)                      \
 114       {                                                                       \
 115         /* This is an illegal character.  */                                  \
 116         if (! ignore_errors_p ())                                             \
 117           {                                                                   \
 118             result = __GCONV_ILLEGAL_INPUT;                                   \
 119             break;                                                            \
 120           }                                                                   \
 121                                                                               \
 122         ++*irreversible;                                                      \
 123         inptr += 4;                                                           \
 124         continue;                                                             \
 125       }                                                                       \
 126                                                                               \
 127     *outptr++ = res;                                                          \
 128     inptr += 4;                                                               \
 129   }
 130 #include <iconv/loop.c>
 131
 132
 133 /* Now define the toplevel functions.  */
 134 #include <iconv/skeleton.c>