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
|
/*
* $Id$
*
* Copyright (C) 2003 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Original Author: Adrian Havill <havill@redhat.com>
*
* Contributors:
*/
#include <time.h> // struct tm
#include "wlite_config.h" // wchar_t, NULL, size_t
#include "wlite_wchar.h" // prototypes
#include "wlite_wctype.h"
#include "wlite_stdlib.h"
static wchar_t *
itowide(wchar_t *s, int i, size_t n) {
for (s += n, *s = L'\0'; n-- != 0; i /= 10) {
*--s = i % 10 + L'0';
}
return s;
}
static int
get_wkyr(int wday_start, int tm_wday, int tm_yday) {
tm_wday = (tm_wday + 7 - wday_start) % 7;
return (tm_yday - tm_wday + 12) / 7 - 1;
}
size_t
wlite_wcsftime(wchar_t *s, size_t n, const wchar_t *fmt, const struct tm *t) {
size_t size = 0;
int percent = 0;
while (n != 0) {
size_t length = 0;
if (percent) {
switch (*fmt) {
case L'a': // abbr weekday name (LC_TIME)
break;
case L'A': // full weekday name (LC_TIME)
break;
case L'b': // abbr month name (LC_TIME)
break;
case L'B': // full month name (LC_TIME)
break;
case L'c': // date & time (LC_TIME)
break;
case L'd': // 2-digit day of the month
if (n >= 2) {
itowide(s, t->tm_mday, length += 2);
}
else return 0;
break;
case L'H': // 2-digit hour of the 24-hour day
if (n >= 2) {
itowide(s, t->tm_hour, length += 2);
}
else return 0;
break;
case L'I': // 2-digit hour of the 12-hour day
if (n >= 2) {
itowide(s, t->tm_hour % 12, length += 2);
}
else return 0;
break;
case L'j': // 3-digit day of the year, from 001
if (n >= 3) {
itowide(s, t->tm_yday + 1, length += 3);
}
else return 0;
break;
case L'm': // 2-digit month of the year, from 01
if (n >= 2) {
itowide(s, t->tm_mon + 1, length += 2);
}
else return 0;
break;
case L'M': // 2-digit minutes after the hour
if (n >= 2) {
itowide(s, t->tm_min, length += 2);
}
else return 0;
break;
case L'p': // AM/PM indicator (LC_TIME)
break;
case L'S': // 2-digit seconds after the minute
if (n >= 2) {
itowide(s, t->tm_sec, length += 2);
}
else return 0;
break;
case L'U': // 2-digit Sunday week of the year
if (n >= 2) {
int tm_wkyr = get_wkyr(0, t->tm_wday, t->tm_yday);
itowide(s, tm_wkyr, length += 2);
}
else return 0;
break;
case L'w': // 1-digit day of the week, from 0 for Sunday
if (n >= 1) {
itowide(s, t->tm_wday, length += 1);
}
else return 0;
break;
case L'W': // 2-digit Monday week of the year
if (n >= 2) {
int tm_wkyr = get_wkyr(1, t->tm_wday, t->tm_yday);
itowide(s, tm_wkyr, length += 2);
}
else return 0;
break;
case L'x': // date (LC_TIME)
break;
case L'X': // time (LC_TIME)
break;
case L'y': // 2-digit year of the century, from 00
if (n >= 2) {
itowide(s, t->tm_year % 100, length += 2);
}
else return 0;
break;
case L'Y': // 4-digit year, from 0001
if (n >= 4) {
itowide(s, t->tm_year + 1900, length += 4);
}
else return 0;
break;
case L'Z': // time zone name
break;
case L'%': // percent sign
if (n >= 1) {
s[length++] = L'%';
}
else return 0;
break;
}
percent = 0;
}
else if (*fmt == L'%') {
percent = !0;
}
else if (n >= 1) {
s[length++] = *fmt;
}
else return 0;
n -= length;
if (*fmt++ == L'\0') break;
}
return size;
}
|
