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 <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         if (! ignore_errors_p ())                                             \
  56           {                                                                   \
  57             result = __GCONV_ILLEGAL_INPUT;                                   \
  58             break;                                                            \
  59           }                                                                   \
  60                                                                               \
  61         ++*irreversible;                                                      \
  62       }                                                                       \
  63     else                                                                      \
  64       {                                                                       \
  65         put32 (outptr, ch);                                                   \
  66         outptr += 4;                                                          \
  67       }                                                                       \
  68                                                                               \
  69     ++inptr;                                                                  \
  70   }
  71 #define LOOP_NEED_FLAGS
  72 #include <iconv/loop.c>
  73
  74
  75 /* Next, define the other direction.  */
  76 #define MIN_NEEDED_INPUT        MIN_NEEDED_TO
  77 #define MIN_NEEDED_OUTPUT       MIN_NEEDED_FROM
  78 #define LOOPFCT                 TO_LOOP
  79 #define BODY \
  80   {                                                                           \
  81     const struct gap *rp = from_idx;                                          \
  82     uint32_t ch = get32 (inptr);                                              \
  83     unsigned char res;                                                        \
  84                                                                               \
  85     if (__builtin_expect (ch, 0) >= 0xffff)                                   \
  86       {                                                                       \
  87         /* This is an illegal character.  */                                  \
  88         if (step_data->__trans.__trans_fct != NULL)                           \
  89           {                                                                   \
  90             result = DL_CALL_FCT (step_data->__trans.__trans_fct,             \
  91                                   (step, step_data, *inptrp, &inptr, inend,   \
  92                                    &outptr, irreversible));                   \
  93             if (result != __GCONV_OK)                                         \
  94               break;                                                          \
  95           }                                                                   \
  96         else if (! ignore_errors_p ())                                        \
  97           {                                                                   \
  98             result = __GCONV_ILLEGAL_INPUT;                                   \
  99             break;                                                            \
 100           }                                                                   \
 101                                                                               \
 102         ++*irreversible;                                                      \
 103         inptr += 4;                                                           \
 104         continue;                                                             \
 105       }                                                                       \
 106     while (ch > rp->end)                                                      \
 107       ++rp;                                                                   \
 108     if (__builtin_expect (ch < rp->start, 0))                                 \
 109       {                                                                       \
 110         /* This is an illegal character.  */                                  \
 111         if (step_data->__trans.__trans_fct != NULL)                           \
 112           {                                                                   \
 113             result = DL_CALL_FCT (step_data->__trans.__trans_fct,             \
 114                                   (step, step_data, *inptrp, &inptr, inend,   \
 115                                    &outptr, irreversible));                   \
 116             if (result != __GCONV_OK)                                         \
 117               break;                                                          \
 118           }                                                                   \
 119         else if (! ignore_errors_p ())                                        \
 120           {                                                                   \
 121             result = __GCONV_ILLEGAL_INPUT;                                   \
 122             break;                                                            \
 123           }                                                                   \
 124         else                                                                  \
 125           {                                                                   \
 126             ++*irreversible;                                                  \
 127             inptr += 4;                                                       \
 128           }                                                                   \
 129         continue;                                                             \
 130       }                                                                       \
 131                                                                               \
 132     res = from_ucs4[ch + rp->idx];                                            \
 133     if (__builtin_expect (res, '\1') == '\0' && ch != 0)                      \
 134       {                                                                       \
 135         /* This is an illegal character.  */                                  \
 136         if (step_data->__trans.__trans_fct != NULL)                           \
 137           {                                                                   \
 138             result = DL_CALL_FCT (step_data->__trans.__trans_fct,             \
 139                                   (step, step_data, *inptrp, &inptr, inend,   \
 140                                    &outptr, irreversible));                   \
 141             if (result != __GCONV_OK)                                         \
 142               break;                                                          \
 143           }                                                                   \
 144         else if (! ignore_errors_p ())                                        \
 145           {                                                                   \
 146             result = __GCONV_ILLEGAL_INPUT;                                   \
 147             break;                                                            \
 148           }                                                                   \
 149         else                                                                  \
 150           {                                                                   \
 151             ++*irreversible;                                                  \
 152             inptr += 4;                                                       \
 153           }                                                                   \
 154         continue;                                                             \
 155       }                                                                       \
 156                                                                               \
 157     *outptr++ = res;                                                          \
 158     inptr += 4;                                                               \
 159   }
 160 #define LOOP_NEED_FLAGS
 161 #include <iconv/loop.c>
 162
 163
 164 /* Now define the toplevel functions.  */
 165 #include <iconv/skeleton.c>