mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-23 03:10:05 +00:00
c1db8b0ddf
* iconv/skeleton.c: Define access macros with u suffix. Adjust #if expression for use of unaligned function to the one used in the definition of these functions. * iconv/gconv_simple.c (internal_ucs4_loop_unaligned): New function. (internal_ucs4le_loop_unaligned): New function. Ralf Baechle <ralf@uni-koblenz.de>
570 lines
17 KiB
C
570 lines
17 KiB
C
/* Simple transformations functions.
|
|
Copyright (C) 1997, 1998, 1999, 2000 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 Library General Public License as
|
|
published by the Free Software Foundation; either version 2 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
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If not,
|
|
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
#include <byteswap.h>
|
|
#include <endian.h>
|
|
#include <errno.h>
|
|
#include <gconv.h>
|
|
#include <stdint.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <wchar.h>
|
|
#include <sys/param.h>
|
|
|
|
#ifndef EILSEQ
|
|
# define EILSEQ EINVAL
|
|
#endif
|
|
|
|
|
|
/* These are definitions used by some of the functions for handling
|
|
UTF-8 encoding below. */
|
|
static const uint32_t encoding_mask[] =
|
|
{
|
|
~0x7ff, ~0xffff, ~0x1fffff, ~0x3ffffff
|
|
};
|
|
|
|
static const unsigned char encoding_byte[] =
|
|
{
|
|
0xc0, 0xe0, 0xf0, 0xf8, 0xfc
|
|
};
|
|
|
|
|
|
/* Transform from the internal, UCS4-like format, to UCS4. The
|
|
difference between the internal ucs4 format and the real UCS4
|
|
format is, if any, the endianess. The Unicode/ISO 10646 says that
|
|
unless some higher protocol specifies it differently, the byte
|
|
order is big endian.*/
|
|
#define DEFINE_INIT 0
|
|
#define DEFINE_FINI 0
|
|
#define MIN_NEEDED_FROM 4
|
|
#define MIN_NEEDED_TO 4
|
|
#define FROM_DIRECTION 1
|
|
#define FROM_LOOP internal_ucs4_loop
|
|
#define TO_LOOP internal_ucs4_loop /* This is not used. */
|
|
#define FUNCTION_NAME __gconv_transform_internal_ucs4
|
|
|
|
|
|
static inline int
|
|
internal_ucs4_loop (const unsigned char **inptrp, const unsigned char *inend,
|
|
unsigned char **outptrp, unsigned char *outend,
|
|
mbstate_t *state, void *data, size_t *converted)
|
|
{
|
|
const unsigned char *inptr = *inptrp;
|
|
unsigned char *outptr = *outptrp;
|
|
size_t n_convert = MIN (inend - inptr, outend - outptr) / 4;
|
|
int result;
|
|
|
|
#if __BYTE_ORDER == __LITTLE_ENDIAN
|
|
/* Sigh, we have to do some real work. */
|
|
size_t cnt;
|
|
|
|
for (cnt = 0; cnt < n_convert; ++cnt, inptr += 4)
|
|
*((uint32_t *) outptr)++ = bswap_32 (*(uint32_t *) inptr);
|
|
|
|
*inptrp = inptr;
|
|
*outptrp = outptr;
|
|
#elif __BYTE_ORDER == __BIG_ENDIAN
|
|
/* Simply copy the data. */
|
|
*inptrp = inptr + n_convert * 4;
|
|
*outptrp = __mempcpy (outptr, inptr, n_convert * 4);
|
|
#else
|
|
# error "This endianess is not supported."
|
|
#endif
|
|
|
|
/* Determine the status. */
|
|
if (*outptrp == outend)
|
|
result = __GCONV_FULL_OUTPUT;
|
|
else if (*inptrp == inend)
|
|
result = __GCONV_EMPTY_INPUT;
|
|
else
|
|
result = __GCONV_INCOMPLETE_INPUT;
|
|
|
|
return result;
|
|
}
|
|
|
|
#ifndef _STRING_ARCH_unaligned
|
|
static inline int
|
|
internal_ucs4_loop_unaligned (const unsigned char **inptrp,
|
|
const unsigned char *inend,
|
|
unsigned char **outptrp, unsigned char *outend,
|
|
mbstate_t *state, void *data, size_t *converted)
|
|
{
|
|
const unsigned char *inptr = *inptrp;
|
|
unsigned char *outptr = *outptrp;
|
|
size_t n_convert = MIN (inend - inptr, outend - outptr) / 4;
|
|
int result;
|
|
|
|
# if __BYTE_ORDER == __LITTLE_ENDIAN
|
|
/* Sigh, we have to do some real work. */
|
|
size_t cnt;
|
|
|
|
for (cnt = 0; cnt < n_convert; ++cnt, inptr += 4, outptr += 4)
|
|
{
|
|
outptr[0] = inptr[3];
|
|
outptr[1] = inptr[2];
|
|
outptr[2] = inptr[1];
|
|
outptr[3] = inptr[0];
|
|
}
|
|
|
|
*inptrp = inptr;
|
|
*outptrp = outptr;
|
|
# elif __BYTE_ORDER == __BIG_ENDIAN
|
|
/* Simply copy the data. */
|
|
*inptrp = inptr + n_convert * 4;
|
|
*outptrp = __mempcpy (outptr, inptr, n_convert * 4);
|
|
# else
|
|
# error "This endianess is not supported."
|
|
# endif
|
|
|
|
/* Determine the status. */
|
|
if (*outptrp == outend)
|
|
result = __GCONV_FULL_OUTPUT;
|
|
else if (*inptrp == inend)
|
|
result = __GCONV_EMPTY_INPUT;
|
|
else
|
|
result = __GCONV_INCOMPLETE_INPUT;
|
|
|
|
return result;
|
|
}
|
|
#endif
|
|
|
|
#include <iconv/skeleton.c>
|
|
|
|
|
|
/* Similarly for the other byte order. */
|
|
#define DEFINE_INIT 0
|
|
#define DEFINE_FINI 0
|
|
#define MIN_NEEDED_FROM 4
|
|
#define MIN_NEEDED_TO 4
|
|
#define FROM_DIRECTION 1
|
|
#define FROM_LOOP internal_ucs4le_loop
|
|
#define TO_LOOP internal_ucs4le_loop /* This is not used. */
|
|
#define FUNCTION_NAME __gconv_transform_internal_ucs4le
|
|
|
|
|
|
static inline int
|
|
internal_ucs4le_loop (const unsigned char **inptrp, const unsigned char *inend,
|
|
unsigned char **outptrp, unsigned char *outend,
|
|
mbstate_t *state, void *data, size_t *converted)
|
|
{
|
|
const unsigned char *inptr = *inptrp;
|
|
unsigned char *outptr = *outptrp;
|
|
size_t n_convert = MIN (inend - inptr, outend - outptr) / 4;
|
|
int result;
|
|
|
|
#if __BYTE_ORDER == __BIG_ENDIAN
|
|
/* Sigh, we have to do some real work. */
|
|
size_t cnt;
|
|
|
|
for (cnt = 0; cnt < n_convert; ++cnt, inptr += 4)
|
|
*((uint32_t *) outptr)++ = bswap_32 (*(uint32_t *) inptr);
|
|
|
|
*inptrp = inptr;
|
|
*outptrp = outptr;
|
|
#elif __BYTE_ORDER == __LITTLE_ENDIAN
|
|
/* Simply copy the data. */
|
|
*inptrp = inptr + n_convert * 4;
|
|
*outptrp = __mempcpy (outptr, inptr, n_convert * 4);
|
|
#else
|
|
# error "This endianess is not supported."
|
|
#endif
|
|
|
|
/* Determine the status. */
|
|
if (*outptrp == outend)
|
|
result = __GCONV_FULL_OUTPUT;
|
|
else if (*inptrp == inend)
|
|
result = __GCONV_EMPTY_INPUT;
|
|
else
|
|
result = __GCONV_INCOMPLETE_INPUT;
|
|
|
|
return result;
|
|
}
|
|
|
|
#ifndef _STRING_ARCH_unaligned
|
|
static inline int
|
|
internal_ucs4le_loop_unaligned (const unsigned char **inptrp,
|
|
const unsigned char *inend,
|
|
unsigned char **outptrp, unsigned char *outend,
|
|
mbstate_t *state, void *data,
|
|
size_t *converted)
|
|
{
|
|
const unsigned char *inptr = *inptrp;
|
|
unsigned char *outptr = *outptrp;
|
|
size_t n_convert = MIN (inend - inptr, outend - outptr) / 4;
|
|
int result;
|
|
|
|
# if __BYTE_ORDER == __BIG_ENDIAN
|
|
/* Sigh, we have to do some real work. */
|
|
size_t cnt;
|
|
|
|
for (cnt = 0; cnt < n_convert; ++cnt, inptr += 4)
|
|
{
|
|
outptr[0] = inptr[3];
|
|
outptr[1] = inptr[2];
|
|
outptr[2] = inptr[1];
|
|
outptr[3] = inptr[0];
|
|
}
|
|
|
|
*inptrp = inptr;
|
|
*outptrp = outptr;
|
|
# elif __BYTE_ORDER == __LITTLE_ENDIAN
|
|
/* Simply copy the data. */
|
|
*inptrp = inptr + n_convert * 4;
|
|
*outptrp = __mempcpy (outptr, inptr, n_convert * 4);
|
|
# else
|
|
# error "This endianess is not supported."
|
|
# endif
|
|
|
|
/* Determine the status. */
|
|
if (*outptrp == outend)
|
|
result = __GCONV_FULL_OUTPUT;
|
|
else if (*inptrp == inend)
|
|
result = __GCONV_EMPTY_INPUT;
|
|
else
|
|
result = __GCONV_INCOMPLETE_INPUT;
|
|
|
|
return result;
|
|
}
|
|
#endif
|
|
|
|
#include <iconv/skeleton.c>
|
|
|
|
|
|
/* Convert from ISO 646-IRV to the internal (UCS4-like) format. */
|
|
#define DEFINE_INIT 0
|
|
#define DEFINE_FINI 0
|
|
#define MIN_NEEDED_FROM 1
|
|
#define MIN_NEEDED_TO 4
|
|
#define FROM_DIRECTION 1
|
|
#define FROM_LOOP ascii_internal_loop
|
|
#define TO_LOOP ascii_internal_loop /* This is not used. */
|
|
#define FUNCTION_NAME __gconv_transform_ascii_internal
|
|
|
|
#define MIN_NEEDED_INPUT MIN_NEEDED_FROM
|
|
#define MIN_NEEDED_OUTPUT MIN_NEEDED_TO
|
|
#define LOOPFCT FROM_LOOP
|
|
#define BODY \
|
|
{ \
|
|
if (*inptr > '\x7f') \
|
|
{ \
|
|
/* This is no correct ANSI_X3.4-1968 character. */ \
|
|
result = __GCONV_ILLEGAL_INPUT; \
|
|
break; \
|
|
} \
|
|
\
|
|
/* It's an one byte sequence. */ \
|
|
*((uint32_t *) outptr)++ = *inptr++; \
|
|
}
|
|
#include <iconv/loop.c>
|
|
#include <iconv/skeleton.c>
|
|
|
|
|
|
/* Convert from the internal (UCS4-like) format to ISO 646-IRV. */
|
|
#define DEFINE_INIT 0
|
|
#define DEFINE_FINI 0
|
|
#define MIN_NEEDED_FROM 4
|
|
#define MIN_NEEDED_TO 1
|
|
#define FROM_DIRECTION 1
|
|
#define FROM_LOOP internal_ascii_loop
|
|
#define TO_LOOP internal_ascii_loop /* This is not used. */
|
|
#define FUNCTION_NAME __gconv_transform_internal_ascii
|
|
|
|
#define MIN_NEEDED_INPUT MIN_NEEDED_FROM
|
|
#define MIN_NEEDED_OUTPUT MIN_NEEDED_TO
|
|
#define LOOPFCT FROM_LOOP
|
|
#define BODY \
|
|
{ \
|
|
if (*((uint32_t *) inptr) > 0x7f) \
|
|
{ \
|
|
/* This is no correct ANSI_X3.4-1968 character. */ \
|
|
result = __GCONV_ILLEGAL_INPUT; \
|
|
break; \
|
|
} \
|
|
\
|
|
/* It's an one byte sequence. */ \
|
|
*outptr++ = *((uint32_t *) inptr)++; \
|
|
}
|
|
#include <iconv/loop.c>
|
|
#include <iconv/skeleton.c>
|
|
|
|
|
|
/* Convert from the internal (UCS4-like) format to UTF-8. */
|
|
#define DEFINE_INIT 0
|
|
#define DEFINE_FINI 0
|
|
#define MIN_NEEDED_FROM 4
|
|
#define MIN_NEEDED_TO 1
|
|
#define MAX_NEEDED_TO 6
|
|
#define FROM_DIRECTION 1
|
|
#define FROM_LOOP internal_utf8_loop
|
|
#define TO_LOOP internal_utf8_loop /* This is not used. */
|
|
#define FUNCTION_NAME __gconv_transform_internal_utf8
|
|
|
|
#define MIN_NEEDED_INPUT MIN_NEEDED_FROM
|
|
#define MIN_NEEDED_OUTPUT MIN_NEEDED_TO
|
|
#define MAX_NEEDED_OUTPUT MAX_NEEDED_TO
|
|
#define LOOPFCT FROM_LOOP
|
|
#define BODY \
|
|
{ \
|
|
uint32_t wc = *((uint32_t *) inptr); \
|
|
\
|
|
/* Since we control every character we read this cannot happen. */ \
|
|
assert (wc <= 0x7fffffff); \
|
|
\
|
|
if (wc < 0x80) \
|
|
/* It's an one byte sequence. */ \
|
|
*outptr++ = (unsigned char) wc; \
|
|
else \
|
|
{ \
|
|
size_t step; \
|
|
char *start; \
|
|
\
|
|
for (step = 2; step < 6; ++step) \
|
|
if ((wc & encoding_mask[step - 2]) == 0) \
|
|
break; \
|
|
\
|
|
if (outptr + step >= outend) \
|
|
{ \
|
|
/* Too long. */ \
|
|
result = __GCONV_FULL_OUTPUT; \
|
|
break; \
|
|
} \
|
|
\
|
|
start = outptr; \
|
|
*outptr = encoding_byte[step - 2]; \
|
|
outptr += step; \
|
|
--step; \
|
|
do \
|
|
{ \
|
|
start[step] = 0x80 | (wc & 0x3f); \
|
|
wc >>= 6; \
|
|
} \
|
|
while (--step > 0); \
|
|
start[0] |= wc; \
|
|
} \
|
|
\
|
|
inptr += 4; \
|
|
}
|
|
#include <iconv/loop.c>
|
|
#include <iconv/skeleton.c>
|
|
|
|
|
|
/* Convert from UTF-8 to the internal (UCS4-like) format. */
|
|
#define DEFINE_INIT 0
|
|
#define DEFINE_FINI 0
|
|
#define MIN_NEEDED_FROM 1
|
|
#define MAX_NEEDED_FROM 6
|
|
#define MIN_NEEDED_TO 4
|
|
#define FROM_DIRECTION 1
|
|
#define FROM_LOOP utf8_internal_loop
|
|
#define TO_LOOP utf8_internal_loop /* This is not used. */
|
|
#define FUNCTION_NAME __gconv_transform_utf8_internal
|
|
|
|
#define MIN_NEEDED_INPUT MIN_NEEDED_FROM
|
|
#define MAX_NEEDED_INPUT MAX_NEEDED_FROM
|
|
#define MIN_NEEDED_OUTPUT MIN_NEEDED_TO
|
|
#define LOOPFCT FROM_LOOP
|
|
#define BODY \
|
|
{ \
|
|
uint32_t ch; \
|
|
uint_fast32_t cnt; \
|
|
uint_fast32_t i; \
|
|
\
|
|
/* Next input byte. */ \
|
|
ch = *inptr; \
|
|
\
|
|
if (ch < 0x80) \
|
|
{ \
|
|
/* One byte sequence. */ \
|
|
cnt = 1; \
|
|
++inptr; \
|
|
} \
|
|
else \
|
|
{ \
|
|
if (ch >= 0xc2 && ch < 0xe0) \
|
|
{ \
|
|
/* We expect two bytes. The first byte cannot be 0xc0 or 0xc1, \
|
|
otherwise the wide character could have been represented \
|
|
using a single byte. */ \
|
|
cnt = 2; \
|
|
ch &= 0x1f; \
|
|
} \
|
|
else if ((ch & 0xf0) == 0xe0) \
|
|
{ \
|
|
/* We expect three bytes. */ \
|
|
cnt = 3; \
|
|
ch &= 0x0f; \
|
|
} \
|
|
else if ((ch & 0xf8) == 0xf0) \
|
|
{ \
|
|
/* We expect four bytes. */ \
|
|
cnt = 4; \
|
|
ch &= 0x07; \
|
|
} \
|
|
else if ((ch & 0xfc) == 0xf8) \
|
|
{ \
|
|
/* We expect five bytes. */ \
|
|
cnt = 5; \
|
|
ch &= 0x03; \
|
|
} \
|
|
else if ((ch & 0xfe) == 0xfc) \
|
|
{ \
|
|
/* We expect six bytes. */ \
|
|
cnt = 6; \
|
|
ch &= 0x01; \
|
|
} \
|
|
else \
|
|
{ \
|
|
/* This is an illegal encoding. */ \
|
|
result = __GCONV_ILLEGAL_INPUT; \
|
|
break; \
|
|
} \
|
|
\
|
|
if (NEED_LENGTH_TEST && inptr + cnt > inend) \
|
|
{ \
|
|
/* We don't have enough input. */ \
|
|
result = __GCONV_INCOMPLETE_INPUT; \
|
|
break; \
|
|
} \
|
|
\
|
|
/* Read the possible remaining bytes. */ \
|
|
for (i = 1; i < cnt; ++i) \
|
|
{ \
|
|
uint32_t byte = inptr[i]; \
|
|
\
|
|
if ((byte & 0xc0) != 0x80) \
|
|
/* This is an illegal encoding. */ \
|
|
break; \
|
|
\
|
|
ch <<= 6; \
|
|
ch |= byte & 0x3f; \
|
|
} \
|
|
\
|
|
/* If i < cnt, some trail byte was not >= 0x80, < 0xc0. \
|
|
If cnt > 2 and ch < 2^(5*cnt-4), the wide character ch could \
|
|
have been represented with fewer than cnt bytes. */ \
|
|
if (i < cnt || (cnt > 2 && (ch >> (5 * cnt - 4)) == 0)) \
|
|
{ \
|
|
/* This is an illegal encoding. */ \
|
|
result = __GCONV_ILLEGAL_INPUT; \
|
|
break; \
|
|
} \
|
|
\
|
|
inptr += cnt; \
|
|
} \
|
|
\
|
|
/* Now adjust the pointers and store the result. */ \
|
|
*((uint32_t *) outptr)++ = ch; \
|
|
}
|
|
#include <iconv/loop.c>
|
|
#include <iconv/skeleton.c>
|
|
|
|
|
|
/* Convert from UCS2 to the internal (UCS4-like) format. */
|
|
#define DEFINE_INIT 0
|
|
#define DEFINE_FINI 0
|
|
#define MIN_NEEDED_FROM 2
|
|
#define MIN_NEEDED_TO 4
|
|
#define FROM_DIRECTION 1
|
|
#define FROM_LOOP ucs2_internal_loop
|
|
#define TO_LOOP ucs2_internal_loop /* This is not used. */
|
|
#define FUNCTION_NAME __gconv_transform_ucs2_internal
|
|
|
|
#define MIN_NEEDED_INPUT MIN_NEEDED_FROM
|
|
#define MIN_NEEDED_OUTPUT MIN_NEEDED_TO
|
|
#define LOOPFCT FROM_LOOP
|
|
#define BODY \
|
|
*((uint32_t *) outptr)++ = *((uint16_t *) inptr)++;
|
|
#include <iconv/loop.c>
|
|
#include <iconv/skeleton.c>
|
|
|
|
|
|
/* Convert from the internal (UCS4-like) format to UCS2. */
|
|
#define DEFINE_INIT 0
|
|
#define DEFINE_FINI 0
|
|
#define MIN_NEEDED_FROM 4
|
|
#define MIN_NEEDED_TO 2
|
|
#define FROM_DIRECTION 1
|
|
#define FROM_LOOP internal_ucs2_loop
|
|
#define TO_LOOP internal_ucs2_loop /* This is not used. */
|
|
#define FUNCTION_NAME __gconv_transform_internal_ucs2
|
|
|
|
#define MIN_NEEDED_INPUT MIN_NEEDED_FROM
|
|
#define MIN_NEEDED_OUTPUT MIN_NEEDED_TO
|
|
#define LOOPFCT FROM_LOOP
|
|
#define BODY \
|
|
{ \
|
|
if (*((uint32_t *) inptr) >= 0x10000) \
|
|
{ \
|
|
result = __GCONV_ILLEGAL_INPUT; \
|
|
break; \
|
|
} \
|
|
*((uint16_t *) outptr)++ = *((uint32_t *) inptr)++; \
|
|
}
|
|
#include <iconv/loop.c>
|
|
#include <iconv/skeleton.c>
|
|
|
|
|
|
/* Convert from UCS2 in other endianness to the internal (UCS4-like) format. */
|
|
#define DEFINE_INIT 0
|
|
#define DEFINE_FINI 0
|
|
#define MIN_NEEDED_FROM 2
|
|
#define MIN_NEEDED_TO 4
|
|
#define FROM_DIRECTION 1
|
|
#define FROM_LOOP ucs2reverse_internal_loop
|
|
#define TO_LOOP ucs2reverse_internal_loop/* This is not used.*/
|
|
#define FUNCTION_NAME __gconv_transform_ucs2reverse_internal
|
|
|
|
#define MIN_NEEDED_INPUT MIN_NEEDED_FROM
|
|
#define MIN_NEEDED_OUTPUT MIN_NEEDED_TO
|
|
#define LOOPFCT FROM_LOOP
|
|
#define BODY \
|
|
*((uint32_t *) outptr)++ = bswap_16 (*(uint16_t *) inptr); \
|
|
inptr += 2;
|
|
#include <iconv/loop.c>
|
|
#include <iconv/skeleton.c>
|
|
|
|
|
|
/* Convert from the internal (UCS4-like) format to UCS2 in other endianness. */
|
|
#define DEFINE_INIT 0
|
|
#define DEFINE_FINI 0
|
|
#define MIN_NEEDED_FROM 4
|
|
#define MIN_NEEDED_TO 2
|
|
#define FROM_DIRECTION 1
|
|
#define FROM_LOOP internal_ucs2reverse_loop
|
|
#define TO_LOOP internal_ucs2reverse_loop/* This is not used.*/
|
|
#define FUNCTION_NAME __gconv_transform_internal_ucs2reverse
|
|
|
|
#define MIN_NEEDED_INPUT MIN_NEEDED_FROM
|
|
#define MIN_NEEDED_OUTPUT MIN_NEEDED_TO
|
|
#define LOOPFCT FROM_LOOP
|
|
#define BODY \
|
|
{ \
|
|
uint32_t val = *((uint32_t *) inptr); \
|
|
if (val >= 0x10000) \
|
|
{ \
|
|
result = __GCONV_ILLEGAL_INPUT; \
|
|
break; \
|
|
} \
|
|
*((uint16_t *) outptr)++ = bswap_16 (val); \
|
|
inptr += 4; \
|
|
}
|
|
#include <iconv/loop.c>
|
|
#include <iconv/skeleton.c>
|