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8bit-gap.c

/* Generic conversion to and from 8bit charsets,
   converting from UCS using gaps.
   Copyright (C) 1997-1999, 2000-2002 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#include <dlfcn.h>
#include <stdint.h>

00025 struct gap
{
  uint16_t start;
  uint16_t end;
  int32_t idx;
};

/* Now we can include the tables.  */
#include TABLES

#ifndef NONNUL
# define NONNUL(c)      ((c) != '\0')
#endif


#define FROM_LOOP       from_gap
#define TO_LOOP               to_gap
#define DEFINE_INIT           1
#define DEFINE_FINI           1
#define MIN_NEEDED_FROM       1
#define MIN_NEEDED_TO         4


/* First define the conversion function from the 8bit charset to UCS4.  */
#define MIN_NEEDED_INPUT      MIN_NEEDED_FROM
#define MIN_NEEDED_OUTPUT     MIN_NEEDED_TO
#define LOOPFCT               FROM_LOOP
#define BODY \
  {                                                         \
    uint32_t ch = to_ucs4[*inptr];                                \
                                                            \
    if (HAS_HOLES && __builtin_expect (ch == L'\0', 0) && NONNUL (*inptr))    \
      {                                                           \
      /* This is an illegal character.  */                              \
      STANDARD_FROM_LOOP_ERR_HANDLER (1);                         \
      }                                                           \
    else                                                    \
      {                                                           \
      put32 (outptr, ch);                                         \
      outptr += 4;                                                \
      }                                                           \
                                                            \
    ++inptr;                                                      \
  }
#define LOOP_NEED_FLAGS
#define ONEBYTE_BODY \
  {                                                         \
    uint32_t ch = to_ucs4[c];                                     \
                                                            \
    if (HAS_HOLES && __builtin_expect (ch == L'\0', 0) && NONNUL (c))         \
      return WEOF;                                                \
    else                                                    \
      return ch;                                            \
  }
#include <iconv/loop.c>


/* Next, define the other direction.  */
#define MIN_NEEDED_INPUT      MIN_NEEDED_TO
#define MIN_NEEDED_OUTPUT     MIN_NEEDED_FROM
#define LOOPFCT               TO_LOOP
#define BODY \
  {                                                         \
    const struct gap *rp = from_idx;                                    \
    uint32_t ch = get32 (inptr);                                  \
    unsigned char res;                                            \
                                                            \
    if (__builtin_expect (ch >= 0xffff, 0))                             \
      {                                                           \
      UNICODE_TAG_HANDLER (ch, 4);                                \
      rp = NULL;                                            \
      }                                                           \
    else                                                    \
      while (ch > rp->end)                                        \
      ++rp;                                                 \
    if (__builtin_expect (rp == NULL, 0)                          \
      || __builtin_expect (ch < rp->start, 0)                           \
      || (res = from_ucs4[ch + rp->idx],                          \
          __builtin_expect (res, '\1') == '\0' && ch != 0))             \
      {                                                           \
      /* This is an illegal character.  */                              \
      STANDARD_TO_LOOP_ERR_HANDLER (4);                           \
      }                                                           \
                                                            \
    *outptr++ = res;                                              \
    inptr += 4;                                                   \
  }
#define LOOP_NEED_FLAGS
#include <iconv/loop.c>


/* Now define the toplevel functions.  */
#include <iconv/skeleton.c>

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