mirror of
git://sourceware.org/git/glibc.git
synced 2024-11-21 01:12:26 +08:00
531950cebd
2001-01-06 Ulrich Drepper <drepper@redhat.com> * iconvdata/ibm937.c (BODY to IBM937): Correct several mistakes in buffer and table handling.
251 lines
8.1 KiB
C
251 lines
8.1 KiB
C
/* Conversion to and from IBM937.
|
|
Copyright (C) 2000, 2001 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Masahide Washizawa <washi@yamato.ibm.co.jp>, 2000.
|
|
|
|
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 <dlfcn.h>
|
|
#include <stdint.h>
|
|
#include <wchar.h>
|
|
#include <byteswap.h>
|
|
#include "ibm937.h"
|
|
|
|
/* The shift sequences for this charset (it does not use ESC). */
|
|
#define SI 0x0F /* Shift In, host code to turn DBCS off. */
|
|
#define SO 0x0E /* Shift Out, host code to turn DBCS on. */
|
|
|
|
/* Definitions used in the body of the `gconv' function. */
|
|
#define CHARSET_NAME "IBM937//"
|
|
#define FROM_LOOP from_ibm937
|
|
#define TO_LOOP to_ibm937
|
|
#define MIN_NEEDED_FROM 1
|
|
#define MAX_NEEDED_FROM 2
|
|
#define MIN_NEEDED_TO 4
|
|
#define MAX_NEEDED_TO 4
|
|
#define PREPARE_LOOP \
|
|
int save_curcs; \
|
|
int *curcsp = &data->__statep->__count;
|
|
#define EXTRA_LOOP_ARGS , curcsp
|
|
|
|
/* Definitions of initialization and destructor function. */
|
|
#define DEFINE_INIT 1
|
|
#define DEFINE_FINI 1
|
|
|
|
|
|
/* Since this is a stateful encoding we have to provide code which resets
|
|
the output state to the initial state. This has to be done during the
|
|
flushing. */
|
|
#define EMIT_SHIFT_TO_INIT \
|
|
if ((data->__statep->__count & ~7) != sb) \
|
|
{ \
|
|
if (FROM_DIRECTION) \
|
|
data->__statep->__count &= 7; \
|
|
else \
|
|
{ \
|
|
unsigned char *outbuf = data->__outbuf; \
|
|
\
|
|
/* We are not in the initial state. To switch back we have \
|
|
to emit `SI'. */ \
|
|
if (__builtin_expect (outbuf >= data->__outbufend, 0)) \
|
|
/* We don't have enough room in the output buffer. */ \
|
|
status = __GCONV_FULL_OUTPUT; \
|
|
else \
|
|
{ \
|
|
/* Write out the shift sequence. */ \
|
|
*outbuf++ = SI; \
|
|
data->__outbuf = outbuf; \
|
|
data->__statep->__count &= 7; \
|
|
} \
|
|
} \
|
|
}
|
|
|
|
|
|
/* Since we might have to reset input pointer we must be able to save
|
|
and retore the state. */
|
|
#define SAVE_RESET_STATE(Save) \
|
|
if (Save) \
|
|
save_curcs = *curcsp; \
|
|
else \
|
|
*curcsp = save_curcs
|
|
|
|
|
|
/* Current codeset type. */
|
|
enum
|
|
{
|
|
sb = 0,
|
|
db = 64
|
|
};
|
|
|
|
/* First, define the conversion function from IBM-937 to UCS4. */
|
|
#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 = *inptr; \
|
|
\
|
|
if (__builtin_expect (ch, 0) == SO) \
|
|
{ \
|
|
/* Shift OUT, change to DBCS converter. */ \
|
|
if (curcs == db) \
|
|
{ \
|
|
result = __GCONV_ILLEGAL_INPUT; \
|
|
break; \
|
|
} \
|
|
curcs = db; \
|
|
++inptr; \
|
|
continue; \
|
|
} \
|
|
else if (__builtin_expect (ch, 0) == SI) \
|
|
{ \
|
|
/* Shift IN, change to SBCS converter. */ \
|
|
if (curcs == sb) \
|
|
{ \
|
|
result = __GCONV_ILLEGAL_INPUT; \
|
|
break; \
|
|
} \
|
|
curcs = sb; \
|
|
++inptr; \
|
|
continue; \
|
|
} \
|
|
\
|
|
if (curcs == sb) \
|
|
{ \
|
|
/* Use the UCS4 table for single byte. */ \
|
|
ch = __ibm937sb_to_ucs4[ch]; \
|
|
if (__builtin_expect (ch, L'\1') == L'\0' && *inptr != '\0') \
|
|
{ \
|
|
/* This is an illegal character. */ \
|
|
if (! ignore_errors_p ()) \
|
|
{ \
|
|
result = __GCONV_ILLEGAL_INPUT; \
|
|
break; \
|
|
} \
|
|
++*irreversible; \
|
|
} \
|
|
else \
|
|
{ \
|
|
put32 (outptr, ch); \
|
|
outptr += 4; \
|
|
} \
|
|
++inptr; \
|
|
} \
|
|
else \
|
|
{ \
|
|
/* Use the IBM937 table for double byte. */ \
|
|
\
|
|
assert (curcs == db); \
|
|
\
|
|
ch = ibm937db_to_ucs4(inptr[0], inptr[1]); \
|
|
if (__builtin_expect (ch, L'\1') == L'\0' && *inptr != '\0') \
|
|
{ \
|
|
/* This is an illegal character. */ \
|
|
if (! ignore_errors_p ()) \
|
|
{ \
|
|
result = __GCONV_ILLEGAL_INPUT; \
|
|
break; \
|
|
} \
|
|
++*irreversible; \
|
|
} \
|
|
else \
|
|
{ \
|
|
put32 (outptr, ch); \
|
|
outptr += 4; \
|
|
} \
|
|
inptr += 2; \
|
|
} \
|
|
}
|
|
#define LOOP_NEED_FLAGS
|
|
#define EXTRA_LOOP_DECLS , int *curcsp
|
|
#define INIT_PARAMS int curcs = *curcsp & ~7
|
|
#define UPDATE_PARAMS *curcsp = curcs
|
|
#include <iconv/loop.c>
|
|
|
|
/* Next, define the other direction. */
|
|
#define MIN_NEEDED_INPUT MIN_NEEDED_TO
|
|
#define MIN_NEEDED_OUTPUT MIN_NEEDED_FROM
|
|
#define MAX_NEEDED_OUTPUT MAX_NEEDED_FROM
|
|
#define LOOPFCT TO_LOOP
|
|
#define BODY \
|
|
{ \
|
|
uint32_t ch = get32 (inptr); \
|
|
const char *cp; \
|
|
\
|
|
/* Use the UCS4 table for single byte. */ \
|
|
cp = __ucs4_to_ibm937sb[ch]; \
|
|
if (__builtin_expect (ch >= (sizeof (__ucs4_to_ibm937sb) \
|
|
/ sizeof (__ucs4_to_ibm937sb[0])), 0) \
|
|
|| (__builtin_expect (cp[0], '\1') == '\0' && ch != 0)) \
|
|
{ \
|
|
/* Use the UCS4 table for double byte. */ \
|
|
cp = __ucs4_to_ibm937db[ch]; \
|
|
if (__builtin_expect (ch >= (sizeof (__ucs4_to_ibm937db) \
|
|
/ sizeof (__ucs4_to_ibm937db[0])), 0) \
|
|
|| __builtin_expect (cp[0], '\1') == '\0') \
|
|
{ \
|
|
/* This is an illegal character. */ \
|
|
if (! ignore_errors_p ()) \
|
|
{ \
|
|
result = __GCONV_ILLEGAL_INPUT; \
|
|
break; \
|
|
} \
|
|
++*irreversible; \
|
|
} \
|
|
else \
|
|
{ \
|
|
if (curcs == sb) \
|
|
{ \
|
|
*outptr++ = SO; \
|
|
curcs = db; \
|
|
} \
|
|
if (__builtin_expect (outptr + 1 >= outend, 0)) \
|
|
{ \
|
|
result = __GCONV_FULL_OUTPUT; \
|
|
break; \
|
|
} \
|
|
*outptr++ = cp[0]; \
|
|
*outptr++ = cp[1]; \
|
|
} \
|
|
} \
|
|
else \
|
|
{ \
|
|
if (curcs == db) \
|
|
{ \
|
|
*outptr++ = SI; \
|
|
curcs = sb; \
|
|
if (__builtin_expect (outptr == outend, 0)) \
|
|
{ \
|
|
result = __GCONV_FULL_OUTPUT; \
|
|
break; \
|
|
} \
|
|
} \
|
|
*outptr++ = cp[0]; \
|
|
} \
|
|
\
|
|
/* Now that we wrote the output increment the input pointer. */ \
|
|
inptr += 4; \
|
|
}
|
|
#define LOOP_NEED_FLAGS
|
|
#define EXTRA_LOOP_DECLS , int *curcsp
|
|
#define INIT_PARAMS int curcs = *curcsp & ~7
|
|
#define UPDATE_PARAMS *curcsp = curcs
|
|
#include <iconv/loop.c>
|
|
|
|
/* Now define the toplevel functions. */
|
|
#include <iconv/skeleton.c>
|