1 /* Conversion from and to IBM943.
2 Copyright (C) 2000-2023 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 <stdbool.h>
22 #include "ibm943.h"
23
24 #define FROM 0
25 #define TO 1
26
27 /* Definitions used in the body of the `gconv' function. */
28 #define CHARSET_NAME "IBM943//"
29 #define FROM_LOOP from_ibm943
30 #define TO_LOOP to_ibm943
31 #define ONE_DIRECTION 0
32
33 /* Definitions of initialization and destructor function. */
34 #define DEFINE_INIT 1
35 #define DEFINE_FINI 1
36
37 #define MIN_NEEDED_FROM 1
38 #define MAX_NEEDED_FROM 2
39 #define MIN_NEEDED_TO 4
40
41 /* First, define the conversion function from IBM-943 to UCS4. */
42 #define MIN_NEEDED_INPUT MIN_NEEDED_FROM
43 #define MAX_NEEDED_INPUT MAX_NEEDED_FROM
44 #define MIN_NEEDED_OUTPUT MIN_NEEDED_TO
45 #define LOOPFCT FROM_LOOP
46 #define BODY \
47 { \
48 const struct gap *rp2 = __ibm943db_to_ucs4_idx; \
49 uint32_t ch = *inptr; \
50 uint32_t res; \
51 \
52 if (__builtin_expect (ch == 0x80, 0) \
53 || __builtin_expect (ch == 0xa0, 0) \
54 || __builtin_expect (ch == 0xfd, 0) \
55 || __builtin_expect (ch == 0xfe, 0) \
56 || __builtin_expect (ch == 0xff, 0)) \
57 { \
58 /* This is an illegal character. */ \
59 STANDARD_FROM_LOOP_ERR_HANDLER (1); \
60 } \
61 \
62 /* Use the IBM943 table for single byte. */ \
63 if (__builtin_expect (ch > 0xdf, 0) \
64 || (res = __ibm943sb_to_ucs4[ch], \
65 __builtin_expect (res == 0, 0) && ch != 0)) \
66 { \
67 /* Use the IBM943 table for double byte. */ \
68 if (__glibc_unlikely (inptr + 1 >= inend)) \
69 { \
70 /* The second character is not available. \
71 Store the intermediate result. */ \
72 result = __GCONV_INCOMPLETE_INPUT; \
73 break; \
74 } \
75 \
76 ch = (ch * 0x100) + inptr[1]; \
77 /* ch was less than 0xfd. */ \
78 assert (ch < 0xfd00); \
79 while (ch > rp2->end) \
80 ++rp2; \
81 \
82 if (__builtin_expect (ch < rp2->start, 0) \
83 || (res = __ibm943db_to_ucs4[ch + rp2->idx], \
84 __builtin_expect (res, '\1') == 0 && ch !=0)) \
85 { \
86 /* This is an illegal character. */ \
87 STANDARD_FROM_LOOP_ERR_HANDLER (2); \
88 } \
89 else \
90 { \
91 put32 (outptr, res); \
92 outptr += 4; \
93 inptr += 2; \
94 } \
95 } \
96 else \
97 { \
98 if (res == 0xa5) \
99 res = 0x5c; \
100 else if (res == 0x203e) \
101 res = 0x7e; \
102 put32 (outptr, res); \
103 outptr += 4; \
104 inptr++; \
105 } \
106 }
107 #define LOOP_NEED_FLAGS
108 #define ONEBYTE_BODY \
109 { \
110 if (c == 0x80 || c == 0xa0 || c >= 0xe0) \
111 return WEOF; \
112 uint32_t res = __ibm943sb_to_ucs4[c]; \
113 if (res == 0 && c != 0) \
114 return WEOF; \
115 if (res == 0xa5) \
116 res = 0x5c; \
117 else if (res == 0x203e) \
118 res = 0x7e; \
119 return res; \
120 }
121 #include <iconv/loop.c>
122
123 /* Next, define the other direction. */
124 #define MIN_NEEDED_INPUT MIN_NEEDED_TO
125 #define MIN_NEEDED_OUTPUT MIN_NEEDED_FROM
126 #define MAX_NEEDED_OUTPUT MAX_NEEDED_FROM
127 #define LOOPFCT TO_LOOP
128 #define BODY \
129 { \
130 const struct gap *rp = __ucs4_to_ibm943sb_idx; \
131 unsigned char sc; \
132 uint32_t ch = get32(inptr); \
133 bool found = true; \
134 uint32_t i; \
135 uint32_t low; \
136 uint32_t high; \
137 uint16_t pccode; \
138 \
139 if (__glibc_unlikely (ch >= 0xffff)) \
140 { \
141 UNICODE_TAG_HANDLER (ch, 4); \
142 rp = NULL; \
143 } \
144 else \
145 while (ch > rp->end) \
146 ++rp; \
147 \
148 /* Use the UCS4 table for single byte. */ \
149 if (__builtin_expect (rp == NULL, 0) \
150 || __builtin_expect (ch < rp->start, 0) \
151 || (sc = __ucs4_to_ibm943sb[ch + rp->idx], \
152 __builtin_expect (sc, '\1') == '\0' && ch != L'\0')) \
153 { \
154 \
155 /* Use the UCS4 table for double byte. */ \
156 found = false; \
157 low = 0; \
158 high = (sizeof (__ucs4_to_ibm943db) >> 1) \
159 / sizeof (__ucs4_to_ibm943db[0][FROM]); \
160 pccode = ch; \
161 if (__glibc_likely (rp != NULL)) \
162 while (low < high) \
163 { \
164 i = (low + high) >> 1; \
165 if (pccode < __ucs4_to_ibm943db[i][FROM]) \
166 high = i; \
167 else if (pccode > __ucs4_to_ibm943db[i][FROM]) \
168 low = i + 1; \
169 else \
170 { \
171 pccode = __ucs4_to_ibm943db[i][TO]; \
172 found = true; \
173 break; \
174 } \
175 } \
176 if (found) \
177 { \
178 if (__glibc_unlikely (outptr + 2 > outend)) \
179 { \
180 result = __GCONV_FULL_OUTPUT; \
181 break; \
182 } \
183 *outptr++ = pccode >> 8 & 0xff; \
184 *outptr++ = pccode & 0xff; \
185 } \
186 else \
187 { \
188 /* This is an illegal character. */ \
189 STANDARD_TO_LOOP_ERR_HANDLER (4); \
190 } \
191 } \
192 else \
193 { \
194 if (__glibc_unlikely (outptr + 1 > outend)) \
195 { \
196 result = __GCONV_FULL_OUTPUT; \
197 break; \
198 } \
199 if (ch == 0x5c) \
200 *outptr++ = 0x5c; \
201 else if (ch == 0x7e) \
202 *outptr++ = 0x7e; \
203 else \
204 *outptr++ = sc; \
205 } \
206 \
207 /* Now that we wrote the output increment the input pointer. */ \
208 inptr += 4; \
209 }
210 #define LOOP_NEED_FLAGS
211 #include <iconv/loop.c>
212
213 /* Now define the toplevel functions. */
214 #include <iconv/skeleton.c>