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
|
#include "date.h"
#include "janet.h"
// wrappers around struct tm
static JanetMethod jd_tm_methods[] = {
{"mktime", jd_mktime},
{"mktime!", jd_mktime_inplace},
{"normalize", jd_mktime_inplace},
{"strftime", jd_strftime},
{"todict", jd_tm_dict},
{NULL, NULL},
};
static int jd_tm_compare(void *lhs, void *rhs) {
struct tm lhp = (*(struct tm*)lhs);
struct tm rhp = (*(struct tm*)rhs);
time_t lhv = mktime(&lhp);
time_t rhv = mktime(&rhp);
return difftime(lhv, rhv);
}
static int jd_tm_get(void *p, Janet key, Janet *out) {
if (!janet_checktype(key, JANET_KEYWORD)) {
return 0;
}
// is it a method?
if(janet_getmethod(janet_unwrap_keyword(key), jd_tm_methods, out)) {
return 1;
}
// piggyback off jd_tm_to_table
JanetTable *tb = jd_tm_to_table(p);
*out = janet_table_rawget(tb, key);
return janet_checktype(*out, JANET_NIL);
}
static const char* jd_tm_keys[] = {
"sec", "min", "hour", "mday", "mon", "year", "wday", "yday", NULL,
};
static Janet jd_tm_next(void *p, Janet key) {
(void) p;
const char **ptr = jd_tm_keys;
while (*ptr) {
if (janet_keyeq(key, *ptr)) {
return *(++ptr) ? janet_ckeywordv(*ptr) : janet_wrap_nil();
}
ptr++;
}
return janet_ckeywordv(jd_tm_keys[0]);
}
// struct tm can represent non-UTC
// it does not keep TZ information so we can't display it without potentially lying
static void jd_tm_tostring(void *p, JanetBuffer *buffer) {
strftime_buffer("%F %T.000", p, buffer);
}
static const JanetAbstractType jd_tm_t = {
"tm",
NULL,
NULL,
jd_tm_get,
NULL,
NULL,
NULL,
jd_tm_tostring,
jd_tm_compare,
NULL,
jd_tm_next,
JANET_ATEND_NEXT
};
struct tm *jd_gettm(Janet *argv, int32_t n) {
return (struct tm*)janet_getabstract(argv, n, &jd_tm_t);
}
struct tm *jd_maketm(void) {
return janet_abstract(&jd_tm_t, sizeof(struct tm));
}
JANET_FN(jd_dict_tm,
"",
"") {
janet_fixarity(argc, 1);
JanetDictView dict = janet_getdictionary(argv, 0);
return janet_wrap_abstract(jd_tm_from_dict(dict));
}
JANET_FN(jd_mktime,
"",
"") {
janet_fixarity(argc, 1);
struct tm *tm = jd_gettm(argv, 0);
struct tm *nw = jd_maketm();
*nw = *tm;
time_t *time = jd_maketime();
*time = mktime(nw);
return janet_wrap_abstract(time);
}
JANET_FN(jd_mktime_inplace,
"",
"") {
janet_fixarity(argc, 1);
struct tm *tm = jd_gettm(argv, 0);
time_t *time = jd_maketime();
*time = mktime(tm);
return janet_wrap_abstract(time);
}
JANET_FN(jd_tm_dict,
"",
"") {
janet_fixarity(argc, 1);
struct tm *tm = jd_gettm(argv, 0);
return janet_wrap_table(jd_tm_to_table(tm));
}
// strftime
struct strftime_format {
const char *keyword;
const char *format;
};
const static struct strftime_format strftime_formats[] = {
{NULL, NULL},
};
JANET_FN(jd_strftime,
"",
"") {
janet_fixarity(argc, 2);
// tm is first for pseudo-OO
struct tm *tm = jd_gettm(argv, 0);
// determine format
const char *format = NULL;
// is it a preset?
if (janet_checktype(argv[1], JANET_KEYWORD)) {
const struct strftime_format *ptr = strftime_formats;
while (ptr->keyword) {
if (janet_keyeq(argv[1], ptr->keyword)) {
format = ptr->format;
break;
}
ptr++;
}
}
// preset not found
if (!format) format = janet_getcbytes(argv, 1);
return janet_wrap_buffer(strftime_buffer(format, tm, NULL));
}
const JanetRegExt jd_tm_cfuns[] = {
JANET_REG("dict->tm", jd_dict_tm),
JANET_REG("mktime", jd_mktime),
JANET_REG("mktime!", jd_mktime_inplace),
JANET_REG("strftime", jd_strftime),
JANET_REG("tm->dict", jd_tm_dict),
JANET_REG_END
};
|
