1 /* Mapping tables for EUC-JP 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 <gconv.h>
22 #include <jis0201.h>
23 #include <jis0208.h>
24 #include <jis0212.h>
25
26 /* Definitions used in the body of the `gconv' function. */
27 #define CHARSET_NAME "EUC-JP//"
28 #define FROM_LOOP from_euc_jp
29 #define TO_LOOP to_euc_jp
30 #define DEFINE_INIT 1
31 #define DEFINE_FINI 1
32 #define MIN_NEEDED_FROM 1
33 #define MAX_NEEDED_FROM 3
34 #define MIN_NEEDED_TO 4
35 #define ONE_DIRECTION 0
36
37
38 /* First define the conversion function from EUC-JP to UCS4. */
39 #define MIN_NEEDED_INPUT MIN_NEEDED_FROM
40 #define MAX_NEEDED_INPUT MAX_NEEDED_FROM
41 #define MIN_NEEDED_OUTPUT MIN_NEEDED_TO
42 #define LOOPFCT FROM_LOOP
43 #define BODY \
44 { \
45 uint32_t ch = *inptr; \
46 \
47 if (ch < 0x8e || (ch >= 0x90 && ch <= 0x9f)) \
48 ++inptr; \
49 else if (ch == 0xff) \
50 { \
51 /* This is illegal. */ \
52 STANDARD_FROM_LOOP_ERR_HANDLER (1); \
53 } \
54 else \
55 { \
56 /* Two or more byte character. First test whether the next \
57 byte is also available. */ \
58 int ch2; \
59 \
60 if (__glibc_unlikely (inptr + 1 >= inend)) \
61 { \
62 /* The second byte is not available. Store the \
63 intermediate result. */ \
64 result = __GCONV_INCOMPLETE_INPUT; \
65 break; \
66 } \
67 \
68 ch2 = inptr[1]; \
69 \
70 /* All second bytes of a multibyte character must be >= 0xa1. */ \
71 if (__glibc_unlikely (ch2 < 0xa1)) \
72 STANDARD_FROM_LOOP_ERR_HANDLER (1); \
73 \
74 if (ch == 0x8e) \
75 { \
76 /* This is code set 2: half-width katakana. */ \
77 ch = jisx0201_to_ucs4 (ch2); \
78 if (__builtin_expect (ch, 0) == __UNKNOWN_10646_CHAR) \
79 STANDARD_FROM_LOOP_ERR_HANDLER (1); \
80 \
81 inptr += 2; \
82 } \
83 else \
84 { \
85 const unsigned char *endp; \
86 \
87 if (ch == 0x8f) \
88 { \
89 /* This is code set 3: JIS X 0212-1990. */ \
90 endp = inptr + 1; \
91 \
92 ch = jisx0212_to_ucs4 (&endp, inend - endp, 0x80); \
93 } \
94 else \
95 { \
96 /* This is code set 1: JIS X 0208. */ \
97 endp = inptr; \
98 \
99 ch = jisx0208_to_ucs4 (&endp, inend - inptr, 0x80); \
100 } \
101 \
102 if (__builtin_expect (ch, 1) == 0) \
103 { \
104 /* Not enough input available. */ \
105 result = __GCONV_INCOMPLETE_INPUT; \
106 break; \
107 } \
108 if (__glibc_unlikely (ch == __UNKNOWN_10646_CHAR)) \
109 /* Illegal character. */ \
110 STANDARD_FROM_LOOP_ERR_HANDLER (1); \
111 \
112 inptr = endp; \
113 } \
114 } \
115 \
116 put32 (outptr, ch); \
117 outptr += 4; \
118 }
119 #define ONEBYTE_BODY \
120 { \
121 if (c < 0x8e || (c >= 0x90 && c <= 0x9f)) \
122 return c; \
123 else \
124 return WEOF; \
125 }
126 #define LOOP_NEED_FLAGS
127 #include <iconv/loop.c>
128
129
130 /* Next, define the other direction. */
131 #define MIN_NEEDED_INPUT MIN_NEEDED_TO
132 #define MIN_NEEDED_OUTPUT MIN_NEEDED_FROM
133 #define MAX_NEEDED_OUTPUT MAX_NEEDED_FROM
134 #define LOOPFCT TO_LOOP
135 #define BODY \
136 { \
137 uint32_t ch = get32 (inptr); \
138 \
139 if (ch < 0x8e || (ch >= 0x90 && ch <= 0x9f)) \
140 /* It's plain ASCII or C1. */ \
141 *outptr++ = ch; \
142 else if (ch == 0xa5) \
143 /* YEN sign => backslash */ \
144 *outptr++ = 0x5c; \
145 else if (ch == 0x203e) \
146 /* overscore => asciitilde */ \
147 *outptr++ = 0x7e; \
148 else \
149 { \
150 /* Try the JIS character sets. */ \
151 size_t found; \
152 \
153 /* See whether we have room for at least two characters. */ \
154 if (__glibc_unlikely (outptr + 1 >= outend)) \
155 { \
156 result = __GCONV_FULL_OUTPUT; \
157 break; \
158 } \
159 \
160 found = ucs4_to_jisx0201 (ch, outptr + 1); \
161 if (found != __UNKNOWN_10646_CHAR) \
162 { \
163 /* Yes, it's a JIS 0201 character. Store the shift byte. */ \
164 *outptr = 0x8e; \
165 outptr += 2; \
166 } \
167 else \
168 { \
169 /* No JIS 0201 character. */ \
170 found = ucs4_to_jisx0208 (ch, outptr, 2); \
171 /* Please note that we always have enough room for the output. */ \
172 if (found != __UNKNOWN_10646_CHAR) \
173 { \
174 /* It's a JIS 0208 character, adjust it for EUC-JP. */ \
175 *outptr++ += 0x80; \
176 *outptr++ += 0x80; \
177 } \
178 else \
179 { \
180 /* No JIS 0208 character. */ \
181 found = ucs4_to_jisx0212 (ch, outptr + 1, \
182 outend - outptr - 1); \
183 \
184 if (__builtin_expect (found, 1) == 0) \
185 { \
186 /* We ran out of space. */ \
187 result = __GCONV_FULL_OUTPUT; \
188 break; \
189 } \
190 else if (__builtin_expect (found, 0) != __UNKNOWN_10646_CHAR) \
191 { \
192 /* It's a JIS 0212 character, adjust it for EUC-JP. */ \
193 *outptr++ = 0x8f; \
194 *outptr++ += 0x80; \
195 *outptr++ += 0x80; \
196 } \
197 else \
198 { \
199 UNICODE_TAG_HANDLER (ch, 4); \
200 \
201 /* Illegal character. */ \
202 STANDARD_TO_LOOP_ERR_HANDLER (4); \
203 } \
204 } \
205 } \
206 } \
207 \
208 inptr += 4; \
209 }
210 #define LOOP_NEED_FLAGS
211 #include <iconv/loop.c>
212
213
214 /* Now define the toplevel functions. */
215 #include <iconv/skeleton.c>