mirror of
git://sourceware.org/git/glibc.git
synced 2024-11-27 03:41:23 +08:00
41bdb6e20c
2001-07-06 Paul Eggert <eggert@twinsun.com> * manual/argp.texi: Remove ignored LGPL copyright notice; it's not appropriate for documentation anyway. * manual/libc-texinfo.sh: "Library General Public License" -> "Lesser General Public License". 2001-07-06 Andreas Jaeger <aj@suse.de> * All files under GPL/LGPL version 2: Place under LGPL version 2.1.
452 lines
14 KiB
C
452 lines
14 KiB
C
/* Conversion loop frame work.
|
|
Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
|
|
|
|
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. */
|
|
|
|
/* This file provides a frame for the reader loop in all conversion modules.
|
|
The actual code must (of course) be provided in the actual module source
|
|
code but certain actions can be written down generically, with some
|
|
customization options which are these:
|
|
|
|
MIN_NEEDED_INPUT minimal number of input bytes needed for the next
|
|
conversion.
|
|
MIN_NEEDED_OUTPUT minimal number of bytes produced by the next round
|
|
of conversion.
|
|
|
|
MAX_NEEDED_INPUT you guess it, this is the maximal number of input
|
|
bytes needed. It defaults to MIN_NEEDED_INPUT
|
|
MAX_NEEDED_OUTPUT likewise for output bytes.
|
|
|
|
LOOPFCT name of the function created. If not specified
|
|
the name is `loop' but this prevents the use
|
|
of multiple functions in the same file.
|
|
|
|
BODY this is supposed to expand to the body of the loop.
|
|
The user must provide this.
|
|
|
|
EXTRA_LOOP_DECLS extra arguments passed from converion loop call.
|
|
|
|
INIT_PARAMS code to define and initialize variables from params.
|
|
UPDATE_PARAMS code to store result in params.
|
|
*/
|
|
|
|
#include <assert.h>
|
|
#include <endian.h>
|
|
#include <gconv.h>
|
|
#include <stdint.h>
|
|
#include <string.h>
|
|
#include <wchar.h>
|
|
#include <sys/param.h> /* For MIN. */
|
|
#define __need_size_t
|
|
#include <stddef.h>
|
|
|
|
|
|
/* We have to provide support for machines which are not able to handled
|
|
unaligned memory accesses. Some of the character encodings have
|
|
representations with a fixed width of 2 or 4 bytes. But if we cannot
|
|
access unaligned memory we still have to read byte-wise. */
|
|
#undef FCTNAME2
|
|
#if defined _STRING_ARCH_unaligned || !defined DEFINE_UNALIGNED
|
|
/* We can handle unaligned memory access. */
|
|
# define get16(addr) *((__const uint16_t *) (addr))
|
|
# define get32(addr) *((__const uint32_t *) (addr))
|
|
|
|
/* We need no special support for writing values either. */
|
|
# define put16(addr, val) *((uint16_t *) (addr)) = (val)
|
|
# define put32(addr, val) *((uint32_t *) (addr)) = (val)
|
|
|
|
# define FCTNAME2(name) name
|
|
#else
|
|
/* Distinguish between big endian and little endian. */
|
|
# if __BYTE_ORDER == __LITTLE_ENDIAN
|
|
# define get16(addr) \
|
|
(((__const unsigned char *) (addr))[1] << 8 \
|
|
| ((__const unsigned char *) (addr))[0])
|
|
# define get32(addr) \
|
|
(((((__const unsigned char *) (addr))[3] << 8 \
|
|
| ((__const unsigned char *) (addr))[2]) << 8 \
|
|
| ((__const unsigned char *) (addr))[1]) << 8 \
|
|
| ((__const unsigned char *) (addr))[0])
|
|
|
|
# define put16(addr, val) \
|
|
({ uint16_t __val = (val); \
|
|
((unsigned char *) (addr))[0] = __val; \
|
|
((unsigned char *) (addr))[1] = __val >> 8; \
|
|
(void) 0; })
|
|
# define put32(addr, val) \
|
|
({ uint32_t __val = (val); \
|
|
((unsigned char *) (addr))[0] = __val; \
|
|
__val >>= 8; \
|
|
((unsigned char *) (addr))[1] = __val; \
|
|
__val >>= 8; \
|
|
((unsigned char *) (addr))[2] = __val; \
|
|
__val >>= 8; \
|
|
((unsigned char *) (addr))[3] = __val; \
|
|
(void) 0; })
|
|
# else
|
|
# define get16(addr) \
|
|
(((__const unsigned char *) (addr))[0] << 8 \
|
|
| ((__const unsigned char *) (addr))[1])
|
|
# define get32(addr) \
|
|
(((((__const unsigned char *) (addr))[0] << 8 \
|
|
| ((__const unsigned char *) (addr))[1]) << 8 \
|
|
| ((__const unsigned char *) (addr))[2]) << 8 \
|
|
| ((__const unsigned char *) (addr))[3])
|
|
|
|
# define put16(addr, val) \
|
|
({ uint16_t __val = (val); \
|
|
((unsigned char *) (addr))[1] = __val; \
|
|
((unsigned char *) (addr))[2] = __val >> 8; \
|
|
(void) 0; })
|
|
# define put32(addr, val) \
|
|
({ uint32_t __val = (val); \
|
|
((unsigned char *) (addr))[3] = __val; \
|
|
__val >>= 8; \
|
|
((unsigned char *) (addr))[2] = __val; \
|
|
__val >>= 8; \
|
|
((unsigned char *) (addr))[1] = __val; \
|
|
__val >>= 8; \
|
|
((unsigned char *) (addr))[0] = __val; \
|
|
(void) 0; })
|
|
# endif
|
|
|
|
# define FCTNAME2(name) name##_unaligned
|
|
#endif
|
|
#define FCTNAME(name) FCTNAME2(name)
|
|
|
|
|
|
/* We need at least one byte for the next round. */
|
|
#ifndef MIN_NEEDED_INPUT
|
|
# error "MIN_NEEDED_INPUT definition missing"
|
|
#endif
|
|
|
|
/* Let's see how many bytes we produce. */
|
|
#ifndef MAX_NEEDED_INPUT
|
|
# define MAX_NEEDED_INPUT MIN_NEEDED_INPUT
|
|
#endif
|
|
|
|
/* We produce at least one byte in the next round. */
|
|
#ifndef MIN_NEEDED_OUTPUT
|
|
# error "MIN_NEEDED_OUTPUT definition missing"
|
|
#endif
|
|
|
|
/* Let's see how many bytes we produce. */
|
|
#ifndef MAX_NEEDED_OUTPUT
|
|
# define MAX_NEEDED_OUTPUT MIN_NEEDED_OUTPUT
|
|
#endif
|
|
|
|
/* Default name for the function. */
|
|
#ifndef LOOPFCT
|
|
# define LOOPFCT loop
|
|
#endif
|
|
|
|
/* Make sure we have a loop body. */
|
|
#ifndef BODY
|
|
# error "Definition of BODY missing for function" LOOPFCT
|
|
#endif
|
|
|
|
|
|
/* If no arguments have to passed to the loop function define the macro
|
|
as empty. */
|
|
#ifndef EXTRA_LOOP_DECLS
|
|
# define EXTRA_LOOP_DECLS
|
|
#endif
|
|
|
|
|
|
/* To make it easier for the writers of the modules, we define a macro
|
|
to test whether we have to ignore errors. */
|
|
#define ignore_errors_p() \
|
|
(irreversible != NULL && (flags & __GCONV_IGNORE_ERRORS))
|
|
|
|
|
|
/* Error handling with transliteration/transcription function use and
|
|
ignoring of errors. Note that we cannot use the do while (0) trick
|
|
since `break' and `continue' must reach certain points. */
|
|
#define STANDARD_ERR_HANDLER(Incr) \
|
|
{ \
|
|
struct __gconv_trans_data *trans; \
|
|
\
|
|
result = __GCONV_ILLEGAL_INPUT; \
|
|
\
|
|
if (irreversible == NULL) \
|
|
/* This means we are in call from __gconv_transliterate. In this \
|
|
case we are not doing any error recovery outself. */ \
|
|
break; \
|
|
\
|
|
/* First try the transliteration methods. */ \
|
|
for (trans = step_data->__trans; trans != NULL; trans = trans->__next) \
|
|
{ \
|
|
result = DL_CALL_FCT (trans->__trans_fct, \
|
|
(step, step_data, trans->__data, *inptrp, \
|
|
&inptr, inend, &outptr, irreversible)); \
|
|
if (result != __GCONV_ILLEGAL_INPUT) \
|
|
break; \
|
|
} \
|
|
/* If any of them recognized the input continue with the loop. */ \
|
|
if (result != __GCONV_ILLEGAL_INPUT) \
|
|
continue; \
|
|
\
|
|
/* Next see whether we have to ignore the error. If not, stop. */ \
|
|
if (! ignore_errors_p ()) \
|
|
break; \
|
|
\
|
|
/* When we come here it means we ignore the character. */ \
|
|
++*irreversible; \
|
|
inptr += Incr; \
|
|
continue; \
|
|
}
|
|
|
|
|
|
/* Handling of Unicode 3.1 TAG characters. Unicode recommends
|
|
"If language codes are not relevant to the particular processing
|
|
operation, then they should be ignored."
|
|
This macro is usually called right before STANDARD_ERR_HANDLER (Incr). */
|
|
#define UNICODE_TAG_HANDLER(Character, Incr) \
|
|
{ \
|
|
/* TAG characters are those in the range U+E0000..U+E007F. */ \
|
|
if (((Character) >> 7) == (0xe0000 >> 7)) \
|
|
{ \
|
|
inptr += Incr; \
|
|
continue; \
|
|
} \
|
|
}
|
|
|
|
|
|
/* The function returns the status, as defined in gconv.h. */
|
|
static inline int
|
|
FCTNAME (LOOPFCT) (struct __gconv_step *step,
|
|
struct __gconv_step_data *step_data,
|
|
const unsigned char **inptrp, const unsigned char *inend,
|
|
unsigned char **outptrp, const unsigned char *outend,
|
|
size_t *irreversible EXTRA_LOOP_DECLS)
|
|
{
|
|
#ifdef LOOP_NEED_STATE
|
|
mbstate_t *state = step_data->__statep;
|
|
#endif
|
|
#ifdef LOOP_NEED_FLAGS
|
|
int flags = step_data->__flags;
|
|
#endif
|
|
#ifdef LOOP_NEED_DATA
|
|
void *data = step->__data;
|
|
#endif
|
|
int result = __GCONV_EMPTY_INPUT;
|
|
const unsigned char *inptr = *inptrp;
|
|
unsigned char *outptr = *outptrp;
|
|
|
|
#ifdef INIT_PARAMS
|
|
INIT_PARAMS;
|
|
#endif
|
|
|
|
while (inptr != inend)
|
|
{
|
|
/* `if' cases for MIN_NEEDED_OUTPUT ==/!= 1 is made to help the
|
|
compiler generating better code. They will be optimized away
|
|
since MIN_NEEDED_OUTPUT is always a constant. */
|
|
if ((MIN_NEEDED_OUTPUT != 1
|
|
&& __builtin_expect (outptr + MIN_NEEDED_OUTPUT > outend, 0))
|
|
|| (MIN_NEEDED_OUTPUT == 1
|
|
&& __builtin_expect (outptr >= outend, 0)))
|
|
{
|
|
/* Overflow in the output buffer. */
|
|
result = __GCONV_FULL_OUTPUT;
|
|
break;
|
|
}
|
|
if (MIN_NEEDED_INPUT > 1
|
|
&& __builtin_expect (inptr + MIN_NEEDED_INPUT > inend, 0))
|
|
{
|
|
/* We don't have enough input for another complete input
|
|
character. */
|
|
result = __GCONV_INCOMPLETE_INPUT;
|
|
break;
|
|
}
|
|
|
|
/* Here comes the body the user provides. It can stop with
|
|
RESULT set to GCONV_INCOMPLETE_INPUT (if the size of the
|
|
input characters vary in size), GCONV_ILLEGAL_INPUT, or
|
|
GCONV_FULL_OUTPUT (if the output characters vary in size). */
|
|
BODY
|
|
}
|
|
|
|
/* Update the pointers pointed to by the parameters. */
|
|
*inptrp = inptr;
|
|
*outptrp = outptr;
|
|
#ifdef UPDATE_PARAMS
|
|
UPDATE_PARAMS;
|
|
#endif
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
/* Include the file a second time to define the function to handle
|
|
unaligned access. */
|
|
#if !defined DEFINE_UNALIGNED && !defined _STRING_ARCH_unaligned \
|
|
&& MIN_NEEDED_FROM != 1 && MAX_NEEDED_FROM % MIN_NEEDED_FROM == 0 \
|
|
&& MIN_NEEDED_TO != 1 && MAX_NEEDED_TO % MIN_NEEDED_TO == 0
|
|
# undef get16
|
|
# undef get32
|
|
# undef put16
|
|
# undef put32
|
|
# undef unaligned
|
|
|
|
# define DEFINE_UNALIGNED
|
|
# include "loop.c"
|
|
# undef DEFINE_UNALIGNED
|
|
#endif
|
|
|
|
|
|
#if MAX_NEEDED_INPUT > 1
|
|
# define SINGLE(fct) SINGLE2 (fct)
|
|
# define SINGLE2(fct) fct##_single
|
|
static inline int
|
|
SINGLE(LOOPFCT) (struct __gconv_step *step,
|
|
struct __gconv_step_data *step_data,
|
|
const unsigned char **inptrp, const unsigned char *inend,
|
|
unsigned char **outptrp, unsigned char *outend,
|
|
size_t *irreversible EXTRA_LOOP_DECLS)
|
|
{
|
|
mbstate_t *state = step_data->__statep;
|
|
#ifdef LOOP_NEED_FLAGS
|
|
int flags = step_data->__flags;
|
|
#endif
|
|
#ifdef LOOP_NEED_DATA
|
|
void *data = step->__data;
|
|
#endif
|
|
int result = __GCONV_OK;
|
|
unsigned char bytebuf[MAX_NEEDED_INPUT];
|
|
const unsigned char *inptr = *inptrp;
|
|
unsigned char *outptr = *outptrp;
|
|
size_t inlen;
|
|
|
|
#ifdef INIT_PARAMS
|
|
INIT_PARAMS;
|
|
#endif
|
|
|
|
#ifdef UNPACK_BYTES
|
|
UNPACK_BYTES
|
|
#else
|
|
/* Add the bytes from the state to the input buffer. */
|
|
for (inlen = 0; inlen < (size_t) (state->__count & 7); ++inlen)
|
|
bytebuf[inlen] = state->__value.__wchb[inlen];
|
|
#endif
|
|
|
|
/* Are there enough bytes in the input buffer? */
|
|
if (__builtin_expect (inptr + (MIN_NEEDED_INPUT - inlen) > inend, 0))
|
|
{
|
|
*inptrp = inend;
|
|
#ifdef STORE_REST
|
|
inptr = bytebuf;
|
|
inptrp = &inptr;
|
|
inend = &bytebuf[inlen];
|
|
|
|
STORE_REST
|
|
#else
|
|
/* We don't have enough input for another complete input
|
|
character. */
|
|
while (inptr < inend)
|
|
state->__value.__wchb[inlen++] = *inptr++;
|
|
#endif
|
|
|
|
return __GCONV_INCOMPLETE_INPUT;
|
|
}
|
|
|
|
/* Enough space in output buffer. */
|
|
if ((MIN_NEEDED_OUTPUT != 1 && outptr + MIN_NEEDED_OUTPUT > outend)
|
|
|| (MIN_NEEDED_OUTPUT == 1 && outptr >= outend))
|
|
/* Overflow in the output buffer. */
|
|
return __GCONV_FULL_OUTPUT;
|
|
|
|
/* Now add characters from the normal input buffer. */
|
|
do
|
|
bytebuf[inlen++] = *inptr++;
|
|
while (inlen < MAX_NEEDED_INPUT && inptr < inend);
|
|
|
|
inptr = bytebuf;
|
|
inend = &bytebuf[inlen];
|
|
|
|
do
|
|
{
|
|
BODY
|
|
}
|
|
while (0);
|
|
|
|
/* Now we either have produced an output character and consumed all the
|
|
bytes from the state and at least one more, or the character is still
|
|
incomplete, or we have some other error (like illegal input character,
|
|
no space in output buffer). */
|
|
if (__builtin_expect (inptr != bytebuf, 1))
|
|
{
|
|
/* We found a new character. */
|
|
assert (inptr - bytebuf > (state->__count & 7));
|
|
|
|
*inptrp += inptr - bytebuf - (state->__count & 7);
|
|
*outptrp = outptr;
|
|
|
|
result = __GCONV_OK;
|
|
|
|
/* Clear the state buffer. */
|
|
state->__count &= ~7;
|
|
}
|
|
else if (result == __GCONV_INCOMPLETE_INPUT)
|
|
{
|
|
/* This can only happen if we have less than MAX_NEEDED_INPUT bytes
|
|
available. */
|
|
assert (inend != &bytebuf[MAX_NEEDED_INPUT]);
|
|
|
|
*inptrp += inend - bytebuf - (state->__count & 7);
|
|
#ifdef STORE_REST
|
|
inptrp = &inptr;
|
|
|
|
STORE_REST
|
|
#else
|
|
/* We don't have enough input for another complete input
|
|
character. */
|
|
while (inptr < inend)
|
|
state->__value.__wchb[inlen++] = *inptr++;
|
|
#endif
|
|
}
|
|
|
|
return result;
|
|
}
|
|
# undef SINGLE
|
|
# undef SINGLE2
|
|
#endif
|
|
|
|
|
|
/* We remove the macro definitions so that we can include this file again
|
|
for the definition of another function. */
|
|
#undef MIN_NEEDED_INPUT
|
|
#undef MAX_NEEDED_INPUT
|
|
#undef MIN_NEEDED_OUTPUT
|
|
#undef MAX_NEEDED_OUTPUT
|
|
#undef LOOPFCT
|
|
#undef BODY
|
|
#undef LOOPFCT
|
|
#undef EXTRA_LOOP_DECLS
|
|
#undef INIT_PARAMS
|
|
#undef UPDATE_PARAMS
|
|
#undef UNPACK_BYTES
|
|
#undef LOOP_NEED_STATE
|
|
#undef LOOP_NEED_FLAGS
|
|
#undef LOOP_NEED_DATA
|
|
#undef get16
|
|
#undef get32
|
|
#undef put16
|
|
#undef put32
|
|
#undef unaligned
|