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 && ch == L'\0' && *inptr != '\0')                           \
  52       {                                                                       \
  53         /* This is an illegal character.  */                                  \
  54         result = __GCONV_ILLEGAL_INPUT;                                       \
  55         break;                                                                \
  56       }                                                                       \
  57                                                                               \
  58     put32 (outptr, ch);                                                       \
  59     outptr += 4;                                                              \
  60     ++inptr;                                                                  \
  61   }
  62 #include <iconv/loop.c>
  63
  64
  65 /* Next, define the other direction.  */
  66 #define MIN_NEEDED_INPUT        MIN_NEEDED_TO
  67 #define MIN_NEEDED_OUTPUT       MIN_NEEDED_FROM
  68 #define LOOPFCT                 TO_LOOP
  69 #define BODY \
  70   {                                                                           \
  71     const struct gap *rp = from_idx;                                          \
  72     uint32_t ch = get32 (inptr);                                              \
  73     unsigned char res;                                                        \
  74                                                                               \
  75     if (ch >= 0xffff)                                                         \
  76       {                                                                       \
  77         /* This is an illegal character.  */                                  \
  78         result = __GCONV_ILLEGAL_INPUT;                                       \
  79         break;                                                                \
  80       }                                                                       \
  81     while (ch > rp->end)                                                      \
  82       ++rp;                                                                   \
  83     if (ch < rp->start)                                                       \
  84       {                                                                       \
  85         /* This is an illegal character.  */                                  \
  86         result = __GCONV_ILLEGAL_INPUT;                                       \
  87         break;                                                                \
  88       }                                                                       \
  89                                                                               \
  90     res = from_ucs4[ch + rp->idx];                                            \
  91     if (ch != 0 && res == '\0')                                               \
  92       {                                                                       \
  93         /* This is an illegal character.  */                                  \
  94         result = __GCONV_ILLEGAL_INPUT;                                       \
  95         break;                                                                \
  96       }                                                                       \
  97                                                                               \
  98     *outptr++ = res;                                                          \
  99     inptr += 4;                                                               \
 100   }
 101 #include <iconv/loop.c>
 102
 103
 104 /* Now define the toplevel functions.  */
 105 #include <iconv/skeleton.c>