1 /* Mapping tables for EUC-KR handling.
2 Copyright (C) 1998-2023 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19 #include <dlfcn.h>
20 #include <stdint.h>
21 #include <ksc5601.h>
22
23
24 static inline void
25 __attribute ((always_inline))
26 euckr_from_ucs4 (uint32_t ch, unsigned char *cp)
27 {
28 if (ch > 0x9f)
29 {
30 if (__builtin_expect (ch, 0) == 0x20a9)
31 {
32 /* Half-width Korean Currency WON sign. There is no
33 equivalent in EUC-KR. Some mappings use \x5c because
34 this is what some old Korean ASCII variants used but this
35 is causing problems. We map it to the FULL WIDTH WON SIGN. */
36 cp[0] = '\xa3';
37 cp[1] = '\xdc';
38 }
39 else if (__builtin_expect (ucs4_to_ksc5601 (ch, cp, 2), 0)
40 != __UNKNOWN_10646_CHAR)
41 {
42 cp[0] |= 0x80;
43 cp[1] |= 0x80;
44 }
45 else
46 cp[0] = cp[1] = '\0';
47 }
48 else
49 {
50 /* There is no mapping for U005c but we nevertheless map it to
51 \x5c. */
52 cp[0] = (unsigned char) ch;
53 cp[1] = '\0';
54 }
55 }
56
57
58 /* Definitions used in the body of the `gconv' function. */
59 #define CHARSET_NAME "EUC-KR//"
60 #define FROM_LOOP from_euc_kr
61 #define TO_LOOP to_euc_kr
62 #define DEFINE_INIT 1
63 #define DEFINE_FINI 1
64 #define MIN_NEEDED_FROM 1
65 #define MAX_NEEDED_FROM 2
66 #define MIN_NEEDED_TO 4
67 #define ONE_DIRECTION 0
68
69
70 /* First define the conversion function from EUC-KR to UCS4. */
71 #define MIN_NEEDED_INPUT MIN_NEEDED_FROM
72 #define MAX_NEEDED_INPUT MAX_NEEDED_FROM
73 #define MIN_NEEDED_OUTPUT MIN_NEEDED_TO
74 #define LOOPFCT FROM_LOOP
75 #define BODY \
76 { \
77 uint32_t ch = *inptr; \
78 \
79 if (ch <= 0x9f) \
80 ++inptr; \
81 else if (__glibc_unlikely (ch == 0xa0)) \
82 { \
83 /* This is illegal. */ \
84 STANDARD_FROM_LOOP_ERR_HANDLER (1); \
85 } \
86 else \
87 { \
88 /* Two-byte character. First test whether the next byte \
89 is also available. */ \
90 ch = ksc5601_to_ucs4 (&inptr, inend - inptr, 0x80); \
91 if (__glibc_unlikely (ch == 0)) \
92 { \
93 /* The second byte is not available. */ \
94 result = __GCONV_INCOMPLETE_INPUT; \
95 break; \
96 } \
97 if (__glibc_unlikely (ch == __UNKNOWN_10646_CHAR)) \
98 /* This is an illegal character. */ \
99 STANDARD_FROM_LOOP_ERR_HANDLER (2); \
100 } \
101 \
102 put32 (outptr, ch); \
103 outptr += 4; \
104 }
105 #define LOOP_NEED_FLAGS
106 #define ONEBYTE_BODY \
107 { \
108 if (c <= 0x9f) \
109 return c; \
110 else \
111 return WEOF; \
112 }
113 #include <iconv/loop.c>
114
115
116 /* Next, define the other direction. */
117 #define MIN_NEEDED_INPUT MIN_NEEDED_TO
118 #define MIN_NEEDED_OUTPUT MIN_NEEDED_FROM
119 #define MAX_NEEDED_OUTPUT MAX_NEEDED_FROM
120 #define LOOPFCT TO_LOOP
121 #define BODY \
122 { \
123 uint32_t ch = get32 (inptr); \
124 unsigned char cp[2]; \
125 \
126 /* Decomposing Hangul syllables not available in KS C 5601 into \
127 Jamos should be considered either here or in euckr_from_ucs4() */ \
128 euckr_from_ucs4 (ch, cp); \
129 \
130 if (__builtin_expect (cp[0], '\1') == '\0' && ch != 0) \
131 { \
132 UNICODE_TAG_HANDLER (ch, 4); \
133 \
134 /* Illegal character. */ \
135 STANDARD_TO_LOOP_ERR_HANDLER (4); \
136 } \
137 \
138 *outptr++ = cp[0]; \
139 /* Now test for a possible second byte and write this if possible. */ \
140 if (cp[1] != '\0') \
141 { \
142 if (__glibc_unlikely (outptr >= outend)) \
143 { \
144 /* The result does not fit into the buffer. */ \
145 --outptr; \
146 result = __GCONV_FULL_OUTPUT; \
147 break; \
148 } \
149 *outptr++ = cp[1]; \
150 } \
151 \
152 inptr += 4; \
153 }
154 #define LOOP_NEED_FLAGS
155 #include <iconv/loop.c>
156
157
158 /* Now define the toplevel functions. */
159 #include <iconv/skeleton.c>