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
|
#include "datetime.h"
#include <ctime>
namespace ledger {
static std::time_t now = std::time(NULL);
struct std::tm * now_tm = std::localtime(&now);
static std::time_t base = -1;
static int base_year = -1;
static const int month_days[12] = {
31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
};
static const char * formats[] = {
"%Y/%m/%d",
"%m/%d",
"%Y.%m.%d",
"%m.%d",
"%Y-%m-%d",
"%m-%d",
"%a",
"%A",
"%b",
"%B",
"%Y",
NULL
};
std::time_t interval_t::increment(const std::time_t moment)
{
// jww (2004-08-11): NYI
return moment + seconds;
}
bool parse_date_mask(const char * date_str, struct std::tm * result)
{
for (const char ** f = formats; *f; f++) {
memset(result, INT_MAX, sizeof(struct std::tm));
if (strptime(date_str, *f, result))
return true;
}
return false;
}
bool parse_date(const char * date_str, std::time_t * result, const int year)
{
struct std::tm when;
if (! parse_date_mask(date_str, &when))
return false;
when.tm_hour = 0;
when.tm_min = 0;
when.tm_sec = 0;
if (when.tm_year == -1)
when.tm_year = ((year == -1) ? now_tm->tm_year : (year - 1900));
if (when.tm_mon == -1)
when.tm_mon = 0;
if (when.tm_mday == -1)
when.tm_mday = 1;
*result = std::mktime(&when);
return true;
}
bool quick_parse_date(char * date_str, std::time_t * result)
{
int year = -1, month = -1, day, num = 0;
for (char * p = date_str; *p; p++) {
if (*p == '/' || *p == '-' || *p == '.') {
if (year == -1)
year = num;
else
month = num;
num = 0;
}
else if (*p < '0' || *p > '9') {
return false;
}
else {
num *= 10;
num += *p - '0';
}
}
day = num;
if (month == -1) {
month = year;
year = -1;
}
if (base == -1 || year != base_year) {
struct std::tm when;
when.tm_hour = 0;
when.tm_min = 0;
when.tm_sec = 0;
base_year = year == -1 ? now_tm->tm_year + 1900 : year;
when.tm_year = year == -1 ? now_tm->tm_year : year - 1900;
when.tm_mon = 0;
when.tm_mday = 1;
base = std::mktime(&when);
}
*result = base;
--month;
while (--month >= 0) {
*result += month_days[month] * 24 * 60 * 60;
if (month == 1 && year % 4 == 0 && year != 2000) // february in leap years
*result += 24 * 60 * 60;
}
if (--day)
*result += day * 24 * 60 * 60;
return true;
}
} // namespace ledger
|
