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
|
unit DateTime;
interface
uses
Windows;
const
SecondsPerDay = 24*60*60;
// Days between 1/1/0001 and 12/31/1899
DateDelta = 693594;
// Days between TDateTime basis (12/31/1899) and Unix time_t basis (1/1/1970)
UnixDateDelta = 25569;
// Days between Unix time_t basis (1/1/1970) and Windows timestamp (1/1/1601)
WinDateDelta = 134774; //
function IsLeapYear(Year:word):Boolean;
function EncodeTime(Hour, Minute, Sec: cardinal):TDateTime;
function EncodeDate(Year, Month , Day: cardinal):TDateTime;
function Timestamp(Year,Month,Day:cardinal;Hour:cardinal=0;Minute:cardinal=0;Sec:cardinal=0):dword; overload;
function Timestamp(const st:TSystemTime):dword; overload;
function GetCurrentTimestamp:DWord;
procedure UnixTimeToFileTime(ts:int_ptr; var pft:TFILETIME);
function FileTimeToUnixTime(const pft: TFILETIME):int_ptr;
function TimeStampToLocalTimeStamp(ts:int_ptr):int_ptr;
function TimestampToDateTime(ts:int_ptr):TDateTime;
function TimestampToSystemTime(Time:DWord; var ST:TSystemTime):PSystemTime;
function DateTimeToStr(Time:Dword; Format:pWideChar=nil):pWideChar;
function DateToStr (Time:Dword; Format:pWideChar=nil):pWideChar;
function TimeToStr (Time:Dword; Format:pWideChar=nil):pWideChar;
function CompareDate(const one,two:TSystemTime):integer;
function CompareTime(const one,two:TSystemTime):integer;
function TimeToMidnight(const t:TSystemTime):integer;
implementation
uses
common;
type
PDayTable = ^TDayTable;
TDayTable = array [0..11] of byte;
const
MonthDays: array [Boolean] of TDayTable =
((31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31),
(31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31));
function IsLeapYear(Year:word):Boolean;
begin
Result:=(Year mod 4=0) and ((Year mod 100<>0) or (Year mod 400=0));
end;
function EncodeTime(Hour, Minute, Sec: cardinal): TDateTime;
begin
result := (Hour*3600 + Minute*60 + Sec) / SecondsPerDay;
end;
function EncodeDate(Year, Month, Day: cardinal):TDateTime;
var
DayTable: PDayTable;
begin
DayTable := @MonthDays[IsLeapYear(Year)];
dec(Month);
while Month>0 do
begin
dec(Month);
inc(Day,DayTable^[Month]);
end;
dec(Year);
result := Year * 365 + Year div 4 - Year div 100 + Year div 400 + Day - DateDelta;
end;
function Timestamp(Year,Month,Day:cardinal;Hour:cardinal=0;Minute:cardinal=0;Sec:cardinal=0):dword;
var
t:tDateTime;
begin
t := EncodeDate(Year, Month, Day);
if t >= 0 then
t := t + EncodeTime(Hour, Minute, Sec)
else
t := t - EncodeTime(Hour, Minute, Sec);
result:=Round((t - UnixDateDelta) * SecondsPerDay);
end;
function Timestamp(const st:TSystemTime):dword;
{$IFDEF AllowInline}inline;{$ENDIF}
begin
result:=Timestamp(st.wYear,st.wMonth,st.wDay,st.wHour,st.wMinute,st.wSecond);
end;
function GetCurrentTimestamp:dword;
var
st:tSystemTime;
begin
GetSystemTime(st);
result:=Timestamp(st.wYear,st.wMonth,st.wDay,st.wHour,st.wMinute,st.wSecond);
end;
procedure UnixTimeToFileTime(ts:int_ptr; var pft:TFILETIME);
var
ll:uint64;
begin
ll := (int64(WinDateDelta)*SecondsPerDay + ts) * 10000000;
pft.dwLowDateTime := dword(ll);
pft.dwHighDateTime := ll shr 32;
end;
function FileTimeToUnixTime(const pft: TFILETIME):int_ptr;
var
ll:uint64;
begin
ll := (uint64(pft.dwHighDateTime) shl 32) or pft.dwLowDateTime;
ll := (ll div 10000000) - int64(WinDateDelta)*SecondsPerDay;
result := int_ptr(ll);
end;
function TimeStampToLocalTimeStamp(ts:int_ptr):int_ptr;
var
ft,lft:TFileTime;
begin
UnixTimeToFileTime(ts,ft);
FileTimeToLocalFileTime(ft, lft);
result:=FileTimeToUnixTime(lft);
end;
function TimestampToDateTime(ts:int_ptr):TDateTime;
begin
Result := UnixDateDelta + TimeStampToLocalTimeStamp(ts) / SecondsPerDay;
end;
function TimestampToSystemTime(Time:DWord; var ST:TSystemTime):PSystemTime;
var
aft,lft:TFILETIME;
begin
UnixTimeToFileTime(Time,aft);
FileTimeToLocalFileTime(aft, lft);
FileTimeToSystemTime(lft,ST);
result:=@ST;
end;
function DateTimeToStr(Time:Dword; Format:pWideChar=nil):pWideChar;
var
buf:array [0..300] of WideChar;
ST: TSystemTime;
pc:pWideChar;
begin
TimestampToSystemTime(Time,ST);
GetDateFormatW(LOCALE_USER_DEFAULT,0,@ST,Format,@buf,300);
if Format<>nil then
GetTimeFormatW(LOCALE_USER_DEFAULT,0,@ST,@buf,@buf,300)
else
begin
pc:=StrEndW(@buf); pc^:=' '; inc(pc);
GetTimeFormatW(LOCALE_USER_DEFAULT,0,@ST,nil,pc,300-(pc-pWideChar(@buf)))
end;
StrDupW(result,buf);
end;
function DateToStr(Time:Dword; Format:pWideChar=nil):pWideChar;
var
buf:array [0..300] of WideChar;
ST: TSystemTime;
begin
TimestampToSystemTime(Time,ST);
GetDateFormatW(LOCALE_USER_DEFAULT,0,@ST,Format,@buf,300);
StrDupW(result,buf);
end;
function TimeToStr(Time:Dword; Format:pWideChar=nil):pWideChar;
var
buf:array [0..300] of WideChar;
ST: TSystemTime;
begin
TimestampToSystemTime(Time,ST);
GetTimeFormatW(LOCALE_USER_DEFAULT,0,@ST,Format,@buf,300);
StrDupW(result,buf);
end;
function CompareDate(const one,two:TSystemTime):integer;
var
t1,t2:integer;
begin
t1:=((one.wYear*12)+one.wMonth)*32+one.wDay;
t2:=((two.wYear*12)+two.wMonth)*32+two.wDay;
result:=t1-t2;
{
result:=one.wYear-two.wYear;
if result=0 then
begin
result:=one.wMonth-two.wMonth;
if result=0 then
begin
result:=one.wDay-two.wDay;
end;
end;
}
end;
function CompareTime(const one,two:TSystemTime):integer;
var
t1,t2:integer;
begin
t1:=one.wHour*3600+one.wMinute*60+one.wSecond;
t2:=two.wHour*3600+two.wMinute*60+two.wSecond;
result:=t1-t2;
{
result:=one.wHour-two.wHour;
if result=0 then
begin
result:=one.wMinute-two.wMinute;
if result=0 then
begin
result:=one.wSecond-two.wSecond;
end;
end;
}
end;
function TimeToMidnight(const t:TSystemTime):integer;
begin
result:=SecondsPerDay-(t.wHour*3600+t.wMinute*60+t.wSecond);
end;
end.
|
