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
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
|
/* Multibyte character data type.
Copyright (C) 2001, 2005 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/* Written by Bruno Haible <bruno@clisp.org>. */
/* A multibyte character is a short subsequence of a char* string,
representing a single wide character.
We use multibyte characters instead of wide characters because of
the following goals:
1) correct multibyte handling, i.e. operate according to the LC_CTYPE
locale,
2) ease of maintenance, i.e. the maintainer needs not know all details
of the ISO C 99 standard,
3) don't fail grossly if the input is not in the encoding set by the
locale, because often different encodings are in use in the same
countries (ISO-8859-1/UTF-8, EUC-JP/Shift_JIS, ...),
4) fast in the case of ASCII characters,
5) portability, i.e. don't make unportable assumptions about wchar_t.
Multibyte characters are only accessed through the mb* macros.
mb_ptr (mbc)
return a pointer to the beginning of the multibyte sequence.
mb_len (mbc)
returns the number of bytes occupied by the multibyte sequence.
Always > 0.
mb_iseq (mbc, sc)
returns true if mbc is the standard ASCII character sc.
mb_isnul (mbc)
returns true if mbc is the nul character.
mb_cmp (mbc1, mbc2)
returns a positive, zero, or negative value depending on whether mbc1
sorts after, same or before mbc2.
mb_casecmp (mbc1, mbc2)
returns a positive, zero, or negative value depending on whether mbc1
sorts after, same or before mbc2, modulo upper/lowercase conversion.
mb_equal (mbc1, mbc2)
returns true if mbc1 and mbc2 are equal.
mb_caseequal (mbc1, mbc2)
returns true if mbc1 and mbc2 are equal modulo upper/lowercase conversion.
mb_isalnum (mbc)
returns true if mbc is alphanumeric.
mb_isalpha (mbc)
returns true if mbc is alphabetic.
mb_isascii(mbc)
returns true if mbc is plain ASCII.
mb_isblank (mbc)
returns true if mbc is a blank.
mb_iscntrl (mbc)
returns true if mbc is a control character.
mb_isdigit (mbc)
returns true if mbc is a decimal digit.
mb_isgraph (mbc)
returns true if mbc is a graphic character.
mb_islower (mbc)
returns true if mbc is lowercase.
mb_isprint (mbc)
returns true if mbc is a printable character.
mb_ispunct (mbc)
returns true if mbc is a punctuation character.
mb_isspace (mbc)
returns true if mbc is a space character.
mb_isupper (mbc)
returns true if mbc is uppercase.
mb_isxdigit (mbc)
returns true if mbc is a hexadecimal digit.
mb_width (mbc)
returns the number of columns on the output device occupied by mbc.
Always >= 0.
mb_putc (mbc, stream)
outputs mbc on stream, a byte oriented FILE stream opened for output.
mb_setascii (&mbc, sc)
assigns the standard ASCII character sc to mbc.
mb_copy (&destmbc, &srcmbc)
copies srcmbc to destmbc.
Here are the function prototypes of the macros.
extern const char * mb_ptr (const mbchar_t mbc);
extern size_t mb_len (const mbchar_t mbc);
extern bool mb_iseq (const mbchar_t mbc, char sc);
extern bool mb_isnul (const mbchar_t mbc);
extern int mb_cmp (const mbchar_t mbc1, const mbchar_t mbc2);
extern int mb_casecmp (const mbchar_t mbc1, const mbchar_t mbc2);
extern bool mb_equal (const mbchar_t mbc1, const mbchar_t mbc2);
extern bool mb_caseequal (const mbchar_t mbc1, const mbchar_t mbc2);
extern bool mb_isalnum (const mbchar_t mbc);
extern bool mb_isalpha (const mbchar_t mbc);
extern bool mb_isascii (const mbchar_t mbc);
extern bool mb_isblank (const mbchar_t mbc);
extern bool mb_iscntrl (const mbchar_t mbc);
extern bool mb_isdigit (const mbchar_t mbc);
extern bool mb_isgraph (const mbchar_t mbc);
extern bool mb_islower (const mbchar_t mbc);
extern bool mb_isprint (const mbchar_t mbc);
extern bool mb_ispunct (const mbchar_t mbc);
extern bool mb_isspace (const mbchar_t mbc);
extern bool mb_isupper (const mbchar_t mbc);
extern bool mb_isxdigit (const mbchar_t mbc);
extern int mb_width (const mbchar_t mbc);
extern void mb_putc (const mbchar_t mbc, FILE *stream);
extern void mb_setascii (mbchar_t *new, char sc);
extern void mb_copy (mbchar_t *new, const mbchar_t *old);
*/
#ifndef _MBCHAR_H
#define _MBCHAR_H 1
#include <stdbool.h>
#include <string.h>
/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
<wchar.h>.
BSD/OS 4.1 has a bug: <stdio.h> and <time.h> must be included before
<wchar.h>. */
#include <stdio.h>
#include <time.h>
#include <wchar.h>
#include <wctype.h>
#define MBCHAR_BUF_SIZE 24
struct mbchar
{
const char *ptr; /* pointer to current character */
size_t bytes; /* number of bytes of current character, > 0 */
bool wc_valid; /* true if wc is a valid wide character */
wchar_t wc; /* if wc_valid: the current character */
char buf[MBCHAR_BUF_SIZE]; /* room for the bytes, used for file input only */
};
/* EOF (not a real character) is represented with bytes = 0 and
wc_valid = false. */
typedef struct mbchar mbchar_t;
/* Access the current character. */
#define mb_ptr(mbc) ((mbc).ptr)
#define mb_len(mbc) ((mbc).bytes)
/* Comparison of characters. */
#define mb_iseq(mbc, sc) ((mbc).wc_valid && (mbc).wc == (sc))
#define mb_isnul(mbc) ((mbc).wc_valid && (mbc).wc == 0)
#define mb_cmp(mbc1, mbc2) \
((mbc1).wc_valid \
? ((mbc2).wc_valid \
? (int) (mbc1).wc - (int) (mbc2).wc \
: -1) \
: ((mbc2).wc_valid \
? 1 \
: (mbc1).bytes == (mbc2).bytes \
? memcmp ((mbc1).ptr, (mbc2).ptr, (mbc1).bytes) \
: (mbc1).bytes < (mbc2).bytes \
? (memcmp ((mbc1).ptr, (mbc2).ptr, (mbc1).bytes) > 0 ? 1 : -1) \
: (memcmp ((mbc1).ptr, (mbc2).ptr, (mbc2).bytes) >= 0 ? 1 : -1)))
#define mb_casecmp(mbc1, mbc2) \
((mbc1).wc_valid \
? ((mbc2).wc_valid \
? (int) towlower ((mbc1).wc) - (int) towlower ((mbc2).wc) \
: -1) \
: ((mbc2).wc_valid \
? 1 \
: (mbc1).bytes == (mbc2).bytes \
? memcmp ((mbc1).ptr, (mbc2).ptr, (mbc1).bytes) \
: (mbc1).bytes < (mbc2).bytes \
? (memcmp ((mbc1).ptr, (mbc2).ptr, (mbc1).bytes) > 0 ? 1 : -1) \
: (memcmp ((mbc1).ptr, (mbc2).ptr, (mbc2).bytes) >= 0 ? 1 : -1)))
#define mb_equal(mbc1, mbc2) \
((mbc1).wc_valid && (mbc2).wc_valid \
? (mbc1).wc == (mbc2).wc \
: (mbc1).bytes == (mbc2).bytes \
&& memcmp ((mbc1).ptr, (mbc2).ptr, (mbc1).bytes) == 0)
#define mb_caseequal(mbc1, mbc2) \
((mbc1).wc_valid && (mbc2).wc_valid \
? towlower ((mbc1).wc) == towlower ((mbc2).wc) \
: (mbc1).bytes == (mbc2).bytes \
&& memcmp ((mbc1).ptr, (mbc2).ptr, (mbc1).bytes) == 0)
/* <ctype.h>, <wctype.h> classification. */
#define mb_isascii(mbc) \
((mbc).wc_valid && (mbc).wc >= 0 && (mbc).wc <= 127)
#define mb_isalnum(mbc) ((mbc).wc_valid && iswalnum ((mbc).wc))
#define mb_isalpha(mbc) ((mbc).wc_valid && iswalpha ((mbc).wc))
#define mb_isblank(mbc) ((mbc).wc_valid && iswblank ((mbc).wc))
#define mb_iscntrl(mbc) ((mbc).wc_valid && iswcntrl ((mbc).wc))
#define mb_isdigit(mbc) ((mbc).wc_valid && iswdigit ((mbc).wc))
#define mb_isgraph(mbc) ((mbc).wc_valid && iswgraph ((mbc).wc))
#define mb_islower(mbc) ((mbc).wc_valid && iswlower ((mbc).wc))
#define mb_isprint(mbc) ((mbc).wc_valid && iswprint ((mbc).wc))
#define mb_ispunct(mbc) ((mbc).wc_valid && iswpunct ((mbc).wc))
#define mb_isspace(mbc) ((mbc).wc_valid && iswspace ((mbc).wc))
#define mb_isupper(mbc) ((mbc).wc_valid && iswupper ((mbc).wc))
#define mb_isxdigit(mbc) ((mbc).wc_valid && iswxdigit ((mbc).wc))
/* Extra <wchar.h> function. */
/* Unprintable characters appear as a small box of width 1. */
#define MB_UNPRINTABLE_WIDTH 1
static inline int
mb_width_aux (wint_t wc)
{
int w = wcwidth (wc);
/* For unprintable characters, arbitrarily return 0 for control characters
and MB_UNPRINTABLE_WIDTH otherwise. */
return (w >= 0 ? w : iswcntrl (wc) ? 0 : MB_UNPRINTABLE_WIDTH);
}
#define mb_width(mbc) \
((mbc).wc_valid ? mb_width_aux ((mbc).wc) : MB_UNPRINTABLE_WIDTH)
/* Output. */
#define mb_putc(mbc, stream) fwrite ((mbc).ptr, 1, (mbc).bytes, (stream))
/* Assignment. */
#define mb_setascii(mbc, sc) \
((mbc)->ptr = (mbc)->buf, (mbc)->bytes = 1, (mbc)->wc_valid = 1, \
(mbc)->wc = (mbc)->buf[0] = (sc))
/* Copying a character. */
static inline void
mb_copy (mbchar_t *new, const mbchar_t *old)
{
if (old->ptr == &old->buf[0])
{
memcpy (&new->buf[0], &old->buf[0], old->bytes);
new->ptr = &new->buf[0];
}
else
new->ptr = old->ptr;
new->bytes = old->bytes;
if ((new->wc_valid = old->wc_valid))
new->wc = old->wc;
}
/* is_basic(c) tests whether the single-byte character c is in the
ISO C "basic character set".
This is a convenience function, and is in this file only to share code
between mbiter_multi.h and mbfile_multi.h. */
#if (' ' == 32) && ('!' == 33) && ('"' == 34) && ('#' == 35) \
&& ('%' == 37) && ('&' == 38) && ('\'' == 39) && ('(' == 40) \
&& (')' == 41) && ('*' == 42) && ('+' == 43) && (',' == 44) \
&& ('-' == 45) && ('.' == 46) && ('/' == 47) && ('0' == 48) \
&& ('1' == 49) && ('2' == 50) && ('3' == 51) && ('4' == 52) \
&& ('5' == 53) && ('6' == 54) && ('7' == 55) && ('8' == 56) \
&& ('9' == 57) && (':' == 58) && (';' == 59) && ('<' == 60) \
&& ('=' == 61) && ('>' == 62) && ('?' == 63) && ('A' == 65) \
&& ('B' == 66) && ('C' == 67) && ('D' == 68) && ('E' == 69) \
&& ('F' == 70) && ('G' == 71) && ('H' == 72) && ('I' == 73) \
&& ('J' == 74) && ('K' == 75) && ('L' == 76) && ('M' == 77) \
&& ('N' == 78) && ('O' == 79) && ('P' == 80) && ('Q' == 81) \
&& ('R' == 82) && ('S' == 83) && ('T' == 84) && ('U' == 85) \
&& ('V' == 86) && ('W' == 87) && ('X' == 88) && ('Y' == 89) \
&& ('Z' == 90) && ('[' == 91) && ('\\' == 92) && (']' == 93) \
&& ('^' == 94) && ('_' == 95) && ('a' == 97) && ('b' == 98) \
&& ('c' == 99) && ('d' == 100) && ('e' == 101) && ('f' == 102) \
&& ('g' == 103) && ('h' == 104) && ('i' == 105) && ('j' == 106) \
&& ('k' == 107) && ('l' == 108) && ('m' == 109) && ('n' == 110) \
&& ('o' == 111) && ('p' == 112) && ('q' == 113) && ('r' == 114) \
&& ('s' == 115) && ('t' == 116) && ('u' == 117) && ('v' == 118) \
&& ('w' == 119) && ('x' == 120) && ('y' == 121) && ('z' == 122) \
&& ('{' == 123) && ('|' == 124) && ('}' == 125) && ('~' == 126)
/* The character set is ISO-646, not EBCDIC. */
# define IS_BASIC_ASCII 1
extern unsigned int is_basic_table[];
static inline bool
is_basic (char c)
{
return (is_basic_table [(unsigned char) c >> 5] >> ((unsigned char) c & 31))
& 1;
}
#else
static inline bool
is_basic (char c)
{
switch (c)
{
case '\t': case '\v': case '\f':
case ' ': case '!': case '"': case '#': case '%':
case '&': case '\'': case '(': case ')': case '*':
case '+': case ',': case '-': case '.': case '/':
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
case ':': case ';': case '<': case '=': case '>':
case '?':
case 'A': case 'B': case 'C': case 'D': case 'E':
case 'F': case 'G': case 'H': case 'I': case 'J':
case 'K': case 'L': case 'M': case 'N': case 'O':
case 'P': case 'Q': case 'R': case 'S': case 'T':
case 'U': case 'V': case 'W': case 'X': case 'Y':
case 'Z':
case '[': case '\\': case ']': case '^': case '_':
case 'a': case 'b': case 'c': case 'd': case 'e':
case 'f': case 'g': case 'h': case 'i': case 'j':
case 'k': case 'l': case 'm': case 'n': case 'o':
case 'p': case 'q': case 'r': case 's': case 't':
case 'u': case 'v': case 'w': case 'x': case 'y':
case 'z': case '{': case '|': case '}': case '~':
return 1;
default:
return 0;
}
}
#endif
#endif /* _MBCHAR_H */
|
