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/* Conversion to and from IBM937.
Copyright (C) 2000 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
/* Definitions of initialization and destructor function. */
#define DEFINE_INIT 1
#define DEFINE_FINI 1
#define MIN_NEEDED_FROM 1
#define MIN_NEEDED_TO 4
/* Current codeset type. */
enum
{
init = 0,
sb,
db
};
/* First, define the conversion function from IBM-937 to UCS4. */
#define MIN_NEEDED_INPUT MIN_NEEDED_FROM
#define MIN_NEEDED_OUTPUT MIN_NEEDED_TO
#define INIT_PARAMS int curcs = init;
#define LOOPFCT FROM_LOOP
#define BODY \
{ \
uint32_t ch = *inptr; \
\
if (__builtin_expect (ch, 0) == SO) \
{ \
if (__builtin_expect (inptr + 1 >= inend, 0)) \
{ \
result = __GCONV_INCOMPLETE_INPUT; \
break; \
} \
\
/* Shift OUT, change to DBCS converter. */ \
if (curcs == db) \
{ \
result = __GCONV_ILLEGAL_INPUT; \
break; \
} \
curcs = db; \
++inptr; \
ch = *inptr; \
} \
else if (__builtin_expect (ch, 0) == SI) \
{ \
if (__builtin_expect (inptr + 1 >= inend, 0)) \
{ \
result = __GCONV_INCOMPLETE_INPUT; \
break; \
} \
\
/* Shift IN, change to SBCS converter. */ \
if (curcs == sb) \
{ \
result = __GCONV_ILLEGAL_INPUT; \
break; \
} \
curcs = sb; \
++inptr; \
ch = *inptr; \
} \
\
if (curcs == sb || curcs == init) \
{ \
/* 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; \
++inptr; \
continue; \
} \
else \
{ \
put32 (outptr, ch); \
outptr += 4; \
inptr++; \
} \
} \
else if (curcs == db) \
{ \
/* Use the IBM937 table for double byte. */ \
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; \
inptr += 2; \
continue; \
} \
else \
{ \
put32 (outptr, ch); \
outptr += 4; \
inptr += 2; \
} \
} \
}
#define LOOP_NEED_FLAGS
#include <iconv/loop.c>
/* Next, define the other direction. */
#define MIN_NEEDED_INPUT MIN_NEEDED_TO
#define MIN_NEEDED_OUTPUT MIN_NEEDED_FROM
#define INIT_PARAMS int curcs = init;
#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 (cp[0], '\1') == '\0' && ch != 0) \
{ \
/* This is an illegal character. */ \
if (! ignore_errors_p ()) \
{ \
result = __GCONV_ILLEGAL_INPUT; \
break; \
} \
++*irreversible; \
} \
else \
{ \
if (curcs == init || curcs == sb) \
{ \
*outptr++ = SO; \
if (__builtin_expect (outptr == outend, 0)) \
{ \
result = __GCONV_FULL_OUTPUT; \
break; \
} \
curcs = db; \
} \
*outptr++ = cp[0]; \
*outptr++ = cp[1]; \
} \
} \
else \
{ \
if (curcs == db) \
{ \
*outptr++ = SI; \
if (__builtin_expect (outptr == outend, 0)) \
{ \
result = __GCONV_FULL_OUTPUT; \
break; \
} \
} \
curcs = sb; \
*outptr++ = cp[0]; \
} \
\
/* Now that we wrote the output increment the input pointer. */ \
inptr += 4; \
}
#define LOOP_NEED_FLAGS
#include <iconv/loop.c>
/* Now define the toplevel functions. */
#include <iconv/skeleton.c>
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