1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
|
/* Conversion module for ISO-2022-KR.
Copyright (C) 1998 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 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 <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 3
#define MIN_NEEDED_TO 4
#define MAX_NEEDED_TO 4
#define PREPARE_LOOP \
int save_set; \
int set = 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 , set
/* The COUNT element of the state keeps track of the currently selected
character set. The possible values are: */
enum
{
ASCII_set = 0,
KSC5601_set
};
/* 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 != 0) \
{ \
if (step->data == &from_object) \
/* It's easy, we don't have to emit anything, we just reset the \
state for the input. */ \
data->statep->count = 0; \
else \
{ \
char *outbuf = data->outbuf; \
\
/* We are not in the initial state. To switch back we have \
to emit `SO'. */ \
if (outbuf == data->outbufend) \
/* We don't have enough room in the output buffer. */ \
status = GCONV_FULL_OUTPUT; \
else \
{ \
/* Write out the shift sequence. */ \
*outbuf++ = SO; \
data->outbuf = outbuf; \
data->statep->count = 0; \
} \
} \
}
/* 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 = set; \
else \
set = save_set
/* First define the conversion function from ISO-2022-JP 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 (ch > 0x7f) \
{ \
result = GCONV_ILLEGAL_INPUT; \
break; \
} \
\
/* Recognize escape sequences. */ \
if (ch == ESC) \
{ \
/* We don't really have to handle escape sequences since all the \
switching is done using the SI and SO bytes. Butwe have to \
recognize `Esc $ ) C' since this is a kind of flag for this \
encoding. We simply ignore it. */ \
if (inptr + 1 > inend \
|| (inptr[1] == '$' \
&& (inptr + 2 > inend \
|| (inptr[2] == ')' && inptr + 3 > inend)))) \
\
{ \
result = GCONV_EMPTY_INPUT; \
break; \
} \
if (inptr[1] == '$' && inptr[2] == ')' && inptr[3] == 'C') \
{ \
/* Yeah, yeah, we know this is ISO 2022-KR. */ \
inptr += 4; \
continue; \
} \
} \
else if (ch == SI) \
{ \
/* Switch to use KSC. */ \
++inptr; \
set = KSC5601_set; \
continue; \
} \
else if (ch == SO) \
{ \
/* Switch to use ASCII. */ \
++inptr; \
set = ASCII_set; \
continue; \
} \
\
if (set == ASCII_set || ch < 0x21 || ch == 0x7f) \
/* Almost done, just advance the input pointer. */ \
++inptr; \
else \
{ \
assert (set == KSC5601_set); \
\
/* Use the KSC 5601 table. */ \
ch = ksc5601_to_ucs4 (&inptr, \
NEED_LENGTH_TEST ? inend - inptr : 2, 0); \
\
if (NEED_LENGTH_TEST && ch == 0) \
{ \
result = GCONV_EMPTY_INPUT; \
break; \
} \
else if (ch == UNKNOWN_10646_CHAR) \
{ \
result = GCONV_ILLEGAL_INPUT; \
break; \
} \
} \
\
*((uint32_t *) outptr)++ = ch; \
}
#define EXTRA_LOOP_DECLS , int 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 \
{ \
unsigned char ch; \
size_t written = 0; \
\
ch = *((uint32_t *) inptr); \
\
/* First see whether we can write the character using the currently \
selected character set. */ \
if (set == ASCII_set || (ch >= 0x01 && (ch < 0x21 || ch == 0x7f))) \
{ \
/* Please note that the NUL byte is *not* matched if we are not \
currently using the ASCII charset. This is because we must \
switch to the initial state whenever a NUL byte is written. */ \
if (ch <= 0x7f) \
{ \
*outptr++ = ch; \
written = 1; \
} \
} \
else \
{ \
assert (set == KSC5601_set); \
\
written = ucs4_to_ksc5601 (ch, outptr, \
(NEED_LENGTH_TEST ? outend - outptr : 2)); \
\
if (NEED_LENGTH_TEST && written == 0) \
{ \
result = GCONV_FULL_OUTPUT; \
break; \
} \
if (written == UNKNOWN_10646_CHAR) \
{ \
/* Either this is an unknown character or we have to switch \
the currently selected character set. The character sets \
do not code entirely separate parts of ISO 10646 and \
therefore there is no single correct result. If we choose \
the character set to use wrong we might be end up with \
using yet another character set for the next character \
though the current and the next could be encoded with one \
character set. We leave this kind of optimization for \
later and now simply use a fixed order in which we test for \
availability */ \
\
if (ch <= 0x7f) \
{ \
/* We must encode using ASCII. First write out the \
escape sequence. */ \
*outptr++ = SO; \
set = ASCII_set; \
\
if (NEED_LENGTH_TEST && outptr == outend) \
{ \
result = GCONV_FULL_OUTPUT; \
break; \
} \
\
*outptr++ = ch; \
} \
else \
{ \
char buf[2]; \
\
written = ucs4_to_ksc5601 (ch, buf, 2); \
if (written != UNKNOWN_10646_CHAR) \
{ \
/* We use KSC 5601. */ \
*outptr++ = SI; \
set = KSC5601_set; \
\
if (NEED_LENGTH_TEST && outptr + 2 > outend) \
{ \
result = GCONV_FULL_OUTPUT; \
break; \
} \
\
*outptr++ = buf[0]; \
*outptr++ = buf[1]; \
} \
else \
{ \
result = GCONV_ILLEGAL_INPUT; \
break; \
} \
} \
} \
} \
\
/* Now that we wrote the output increment the input pointer. */ \
inptr += 4; \
}
#define EXTRA_LOOP_DECLS , int set
#include <iconv/loop.c>
/* Now define the toplevel functions. */
#include <iconv/skeleton.c>
|
