1/* Mapping tables for EUC-TW handling.
2 Copyright (C) 1998-2021 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
5
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
10
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <https://www.gnu.org/licenses/>. */
19
20#include <dlfcn.h>
21#include <stdint.h>
22#include <cns11643l1.h>
23#include <cns11643.h>
24
25/* Definitions used in the body of the `gconv' function. */
26#define CHARSET_NAME "EUC-TW//"
27#define FROM_LOOP from_euc_tw
28#define TO_LOOP to_euc_tw
29#define DEFINE_INIT 1
30#define DEFINE_FINI 1
31#define MIN_NEEDED_FROM 1
32#define MAX_NEEDED_FROM 4
33#define MIN_NEEDED_TO 4
34#define ONE_DIRECTION 0
35
36
37/* First define the conversion function from EUC-TW to UCS4. */
38#define MIN_NEEDED_INPUT MIN_NEEDED_FROM
39#define MAX_NEEDED_INPUT MAX_NEEDED_FROM
40#define MIN_NEEDED_OUTPUT MIN_NEEDED_TO
41#define LOOPFCT FROM_LOOP
42#define BODY \
43 { \
44 uint32_t ch = *inptr; \
45 \
46 if (ch <= 0x7f) \
47 /* Plain ASCII. */ \
48 ++inptr; \
49 else if ((ch <= 0xa0 || ch > 0xfe) && ch != 0x8e) \
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 byte \
57 is also available. */ \
58 uint32_t ch2; \
59 \
60 if (inptr + 1 >= inend) \
61 { \
62 /* The second byte is not available. Store the intermediate \
63 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 (ch2 < 0xa1 || ch2 == 0xff) \
72 STANDARD_FROM_LOOP_ERR_HANDLER (1); \
73 \
74 if (ch == 0x8e) \
75 { \
76 /* This is code set 2: CNS 11643, planes 1 to 16. */ \
77 const unsigned char *endp = inptr + 1; \
78 \
79 ch = cns11643_to_ucs4 (&endp, inend - inptr - 1, 0x80); \
80 \
81 if (ch == 0) \
82 { \
83 /* The third or fourth byte is not available. Store \
84 the intermediate result. */ \
85 result = __GCONV_INCOMPLETE_INPUT; \
86 break; \
87 } \
88 \
89 if (ch == __UNKNOWN_10646_CHAR) \
90 /* Illegal input. */ \
91 STANDARD_FROM_LOOP_ERR_HANDLER (1); \
92 \
93 inptr += 4; \
94 } \
95 else \
96 { \
97 /* This is code set 1: CNS 11643, plane 1. */ \
98 const unsigned char *endp = inptr; \
99 \
100 ch = cns11643l1_to_ucs4 (&endp, inend - inptr, 0x80); \
101 /* Please note that we need not test for the missing input \
102 characters here anymore. */ \
103 if (ch == __UNKNOWN_10646_CHAR) \
104 /* Illegal input. */ \
105 STANDARD_FROM_LOOP_ERR_HANDLER (2); \
106 \
107 inptr += 2; \
108 } \
109 } \
110 \
111 put32 (outptr, ch); \
112 outptr += 4; \
113 }
114#define LOOP_NEED_FLAGS
115#define ONEBYTE_BODY \
116 { \
117 if (c < 0x80) \
118 return c; \
119 else \
120 return WEOF; \
121 }
122#include <iconv/loop.c>
123
124
125/* Next, define the other direction. */
126#define MIN_NEEDED_INPUT MIN_NEEDED_TO
127#define MIN_NEEDED_OUTPUT MIN_NEEDED_FROM
128#define MAX_NEEDED_OUTPUT MAX_NEEDED_FROM
129#define LOOPFCT TO_LOOP
130#define BODY \
131 { \
132 uint32_t ch = get32 (inptr); \
133 \
134 if (ch <= 0x7f) \
135 /* It's plain ASCII. */ \
136 *outptr++ = ch; \
137 else \
138 { \
139 /* Try the CNS 11643 planes. */ \
140 size_t found; \
141 \
142 found = ucs4_to_cns11643l1 (ch, outptr, outend - outptr); \
143 if (__builtin_expect (found, 1) == 0) \
144 { \
145 /* We ran out of space. */ \
146 result = __GCONV_FULL_OUTPUT; \
147 break; \
148 } \
149 if (__builtin_expect (found, 1) != __UNKNOWN_10646_CHAR) \
150 { \
151 /* It's a CNS 11643, plane 1 character, adjust it for EUC-TW. */ \
152 *outptr++ += 0x80; \
153 *outptr++ += 0x80; \
154 } \
155 else \
156 { \
157 /* No CNS 11643, plane 1 character. */ \
158 \
159 found = ucs4_to_cns11643 (ch, outptr + 1, outend - outptr - 1); \
160 if (__builtin_expect (found, 1) == 0) \
161 { \
162 /* We ran out of space. */ \
163 result = __GCONV_FULL_OUTPUT; \
164 break; \
165 } \
166 if (__builtin_expect (found, 0) == __UNKNOWN_10646_CHAR) \
167 { \
168 UNICODE_TAG_HANDLER (ch, 4); \
169 \
170 /* Illegal character. */ \
171 STANDARD_TO_LOOP_ERR_HANDLER (4); \
172 } \
173 \
174 /* It's a CNS 11643 character, adjust it for EUC-TW. */ \
175 *outptr++ = '\x8e'; \
176 *outptr++ += 0xa0; \
177 *outptr++ += 0x80; \
178 *outptr++ += 0x80; \
179 } \
180 } \
181 \
182 inptr += 4; \
183 }
184#define LOOP_NEED_FLAGS
185#include <iconv/loop.c>
186
187
188/* Now define the toplevel functions. */
189#include <iconv/skeleton.c>
190