mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-29 16:21:07 +00:00
270 lines
8.8 KiB
C
270 lines
8.8 KiB
C
/* Conversion module for ISO-2022-KR.
|
|
Copyright (C) 1998-2014 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, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <dlfcn.h>
|
|
#include <gconv.h>
|
|
#include <stdint.h>
|
|
#include <string.h>
|
|
#include "ksc5601.h"
|
|
|
|
#include <assert.h>
|
|
|
|
/* This makes obvious what everybody knows: 0x1b is the Esc character. */
|
|
#define ESC 0x1b
|
|
|
|
/* The shift sequences for this charset (it does not use ESC). */
|
|
#define SI 0x0f
|
|
#define SO 0x0e
|
|
|
|
/* Definitions used in the body of the `gconv' function. */
|
|
#define CHARSET_NAME "ISO-2022-KR//"
|
|
#define DEFINE_INIT 1
|
|
#define DEFINE_FINI 1
|
|
#define FROM_LOOP from_iso2022kr_loop
|
|
#define TO_LOOP to_iso2022kr_loop
|
|
#define MIN_NEEDED_FROM 1
|
|
#define MAX_NEEDED_FROM 4
|
|
#define MIN_NEEDED_TO 4
|
|
#define MAX_NEEDED_TO 4
|
|
#define PREPARE_LOOP \
|
|
int save_set; \
|
|
int *setp = &data->__statep->__count; \
|
|
if (!FROM_DIRECTION && !data->__internal_use \
|
|
&& data->__invocation_counter == 0) \
|
|
{ \
|
|
/* Emit the designator sequence. */ \
|
|
if (outbuf + 4 > outend) \
|
|
return __GCONV_FULL_OUTPUT; \
|
|
\
|
|
*outbuf++ = ESC; \
|
|
*outbuf++ = '$'; \
|
|
*outbuf++ = ')'; \
|
|
*outbuf++ = 'C'; \
|
|
}
|
|
#define EXTRA_LOOP_ARGS , setp
|
|
|
|
|
|
/* The COUNT element of the state keeps track of the currently selected
|
|
character set. The possible values are: */
|
|
enum
|
|
{
|
|
ASCII_set = 0,
|
|
KSC5601_set = 8
|
|
};
|
|
|
|
|
|
/* 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 != ASCII_set) \
|
|
{ \
|
|
if (FROM_DIRECTION) \
|
|
{ \
|
|
/* It's easy, we don't have to emit anything, we just reset the \
|
|
state for the input. */ \
|
|
data->__statep->__count &= 7; \
|
|
data->__statep->__count |= ASCII_set; \
|
|
} \
|
|
else \
|
|
{ \
|
|
/* We are not in the initial state. To switch back we have \
|
|
to emit `SI'. */ \
|
|
if (__builtin_expect (outbuf == outend, 0)) \
|
|
/* We don't have enough room in the output buffer. */ \
|
|
status = __GCONV_FULL_OUTPUT; \
|
|
else \
|
|
{ \
|
|
/* Write out the shift sequence. */ \
|
|
*outbuf++ = SI; \
|
|
data->__statep->__count = ASCII_set; \
|
|
} \
|
|
} \
|
|
}
|
|
|
|
|
|
/* 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_set = *setp; \
|
|
else \
|
|
*setp = save_set
|
|
|
|
|
|
/* First define the conversion function from ISO-2022-KR 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; \
|
|
\
|
|
/* This is a 7bit character set, disallow all 8bit characters. */ \
|
|
if (__builtin_expect (ch > 0x7f, 0)) \
|
|
STANDARD_FROM_LOOP_ERR_HANDLER (1); \
|
|
\
|
|
/* Recognize escape sequences. */ \
|
|
if (__builtin_expect (ch, 0) == ESC) \
|
|
{ \
|
|
/* We don't really have to handle escape sequences since all the \
|
|
switching is done using the SI and SO bytes. But we have to \
|
|
recognize `Esc $ ) C' since this is a kind of flag for this \
|
|
encoding. We simply ignore it. */ \
|
|
if (__builtin_expect (inptr + 2 > inend, 0) \
|
|
|| (inptr[1] == '$' \
|
|
&& (__builtin_expect (inptr + 3 > inend, 0) \
|
|
|| (inptr[2] == ')' \
|
|
&& __builtin_expect (inptr + 4 > inend, 0))))) \
|
|
{ \
|
|
result = __GCONV_INCOMPLETE_INPUT; \
|
|
break; \
|
|
} \
|
|
if (inptr[1] == '$' && inptr[2] == ')' && inptr[3] == 'C') \
|
|
{ \
|
|
/* Yeah, yeah, we know this is ISO 2022-KR. */ \
|
|
inptr += 4; \
|
|
continue; \
|
|
} \
|
|
} \
|
|
else if (__builtin_expect (ch, 0) == SO) \
|
|
{ \
|
|
/* Switch to use KSC. */ \
|
|
++inptr; \
|
|
set = KSC5601_set; \
|
|
continue; \
|
|
} \
|
|
else if (__builtin_expect (ch, 0) == SI) \
|
|
{ \
|
|
/* Switch to use ASCII. */ \
|
|
++inptr; \
|
|
set = ASCII_set; \
|
|
continue; \
|
|
} \
|
|
\
|
|
if (set == ASCII_set) \
|
|
{ \
|
|
/* Almost done, just advance the input pointer. */ \
|
|
++inptr; \
|
|
} \
|
|
else \
|
|
{ \
|
|
assert (set == KSC5601_set); \
|
|
\
|
|
/* Use the KSC 5601 table. */ \
|
|
ch = ksc5601_to_ucs4 (&inptr, inend - inptr, 0); \
|
|
\
|
|
if (__builtin_expect (ch == 0, 0)) \
|
|
{ \
|
|
result = __GCONV_INCOMPLETE_INPUT; \
|
|
break; \
|
|
} \
|
|
else if (__builtin_expect (ch == __UNKNOWN_10646_CHAR, 0)) \
|
|
{ \
|
|
STANDARD_FROM_LOOP_ERR_HANDLER (1); \
|
|
} \
|
|
} \
|
|
\
|
|
put32 (outptr, ch); \
|
|
outptr += 4; \
|
|
}
|
|
#define LOOP_NEED_FLAGS
|
|
#define EXTRA_LOOP_DECLS , int *setp
|
|
#define INIT_PARAMS int set = *setp
|
|
#define UPDATE_PARAMS *setp = set
|
|
#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); \
|
|
\
|
|
/* First see whether we can write the character using the currently \
|
|
selected character set. */ \
|
|
if (ch < 0x80) \
|
|
{ \
|
|
if (set != ASCII_set) \
|
|
{ \
|
|
*outptr++ = SI; \
|
|
set = ASCII_set; \
|
|
if (__builtin_expect (outptr == outend, 0)) \
|
|
{ \
|
|
result = __GCONV_FULL_OUTPUT; \
|
|
break; \
|
|
} \
|
|
} \
|
|
\
|
|
*outptr++ = ch; \
|
|
} \
|
|
else \
|
|
{ \
|
|
unsigned char buf[2]; \
|
|
/* Fake initialization to keep gcc quiet. */ \
|
|
asm ("" : "=m" (buf)); \
|
|
\
|
|
size_t written = ucs4_to_ksc5601 (ch, buf, 2); \
|
|
if (__builtin_expect (written, 0) == __UNKNOWN_10646_CHAR) \
|
|
{ \
|
|
UNICODE_TAG_HANDLER (ch, 4); \
|
|
\
|
|
/* Illegal character. */ \
|
|
STANDARD_TO_LOOP_ERR_HANDLER (4); \
|
|
} \
|
|
else \
|
|
{ \
|
|
assert (written == 2); \
|
|
\
|
|
/* We use KSC 5601. */ \
|
|
if (set != KSC5601_set) \
|
|
{ \
|
|
*outptr++ = SO; \
|
|
set = KSC5601_set; \
|
|
} \
|
|
\
|
|
if (__builtin_expect (outptr + 2 > outend, 0)) \
|
|
{ \
|
|
result = __GCONV_FULL_OUTPUT; \
|
|
break; \
|
|
} \
|
|
\
|
|
*outptr++ = buf[0]; \
|
|
*outptr++ = buf[1]; \
|
|
} \
|
|
} \
|
|
\
|
|
/* Now that we wrote the output increment the input pointer. */ \
|
|
inptr += 4; \
|
|
}
|
|
#define LOOP_NEED_FLAGS
|
|
#define EXTRA_LOOP_DECLS , int *setp
|
|
#define INIT_PARAMS int set = *setp
|
|
#define REINIT_PARAMS set = *setp
|
|
#define UPDATE_PARAMS *setp = set
|
|
#include <iconv/loop.c>
|
|
|
|
|
|
/* Now define the toplevel functions. */
|
|
#include <iconv/skeleton.c>
|