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synautil.pas
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synautil.pas
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{==============================================================================|
| Project : Ararat Synapse | 004.015.007 |
|==============================================================================|
| Content: support procedures and functions |
|==============================================================================|
| Copyright (c)1999-2017, Lukas Gebauer |
| All rights reserved. |
| |
| Redistribution and use in source and binary forms, with or without |
| modification, are permitted provided that the following conditions are met: |
| |
| Redistributions of source code must retain the above copyright notice, this |
| list of conditions and the following disclaimer. |
| |
| Redistributions in binary form must reproduce the above copyright notice, |
| this list of conditions and the following disclaimer in the documentation |
| and/or other materials provided with the distribution. |
| |
| Neither the name of Lukas Gebauer nor the names of its contributors may |
| be used to endorse or promote products derived from this software without |
| specific prior written permission. |
| |
| THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR |
| ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH |
| DAMAGE. |
|==============================================================================|
| The Initial Developer of the Original Code is Lukas Gebauer (Czech Republic).|
| Portions created by Lukas Gebauer are Copyright (c) 1999-2017. |
| Portions created by Hernan Sanchez are Copyright (c) 2000. |
| Portions created by Petr Fejfar are Copyright (c)2011-2012. |
| All Rights Reserved. |
|==============================================================================|
| Contributor(s): |
| Hernan Sanchez ([email protected]) |
| Tomas Hajny (OS2 support) |
| Radek Cervinka (POSIX support) |
|==============================================================================|
| History: see HISTORY.HTM from distribution package |
| (Found at URL: http://www.ararat.cz/synapse/) |
|==============================================================================}
{:@abstract(Support procedures and functions)}
{$I jedi.inc} // load common compiler defines
{$Q-}
{$R-}
{$H+}
{$IFDEF UNICODE}
{$WARN IMPLICIT_STRING_CAST OFF}
{$WARN IMPLICIT_STRING_CAST_LOSS OFF}
{$WARN SUSPICIOUS_TYPECAST OFF}
{$ENDIF}
unit synautil;
interface
uses
{$IFDEF MSWINDOWS}
Windows,
{$ELSE MSWINDOWS}
{$IFDEF FPC}
{$IFDEF OS2}
Dos, TZUtil,
{$ELSE OS2}
UnixUtil, Unix, BaseUnix,
{$ENDIF OS2}
{$ELSE FPC}
{$IFDEF POSIX}
Posix.Base, Posix.Time, Posix.SysTypes, Posix.SysTime, Posix.Stdio,
{$ELSE}
Libc,
{$ENDIF}
{$ENDIF}
{$ENDIF}
{$IFDEF CIL}
System.IO,
{$ENDIF}
SysUtils, Classes, SynaFpc;
{$IFDEF VER100}
type
int64 = integer;
{$ENDIF}
{$IFDEF POSIX}
type
TTimeVal = Posix.SysTime.timeval;
Ttimezone = record
tz_minuteswest: Integer ; // minutes west of Greenwich
tz_dsttime: integer ; // type of DST correction
end;
PTimeZone = ^Ttimezone;
{$ENDIF}
{:Return your timezone bias from UTC time in minutes.}
function TimeZoneBias: integer;
{:Return your timezone bias from UTC time in string representation like "+0200".}
function TimeZone: string;
{:Returns current time in format defined in RFC-822. Useful for SMTP messages,
but other protocols use this time format as well. Results contains the timezone
specification. Four digit year is used to break any Y2K concerns. (Example
'Fri, 15 Oct 1999 21:14:56 +0200')}
function Rfc822DateTime(t: TDateTime): string;
{:Returns date and time in format defined in C compilers in format "mmm dd hh:nn:ss"}
function CDateTime(t: TDateTime): string;
{:Returns date and time in format defined in format 'yymmdd hhnnss'}
function SimpleDateTime(t: TDateTime): string;
{:Returns date and time in format defined in ANSI C compilers in format
"ddd mmm d hh:nn:ss yyyy" }
function AnsiCDateTime(t: TDateTime): string;
{:Decode three-letter string with name of month to their month number. If string
not match any month name, then is returned 0. For parsing are used predefined
names for English, French and German and names from system locale too.}
function GetMonthNumber(Value: String): integer;
{:Return decoded time from given string. Time must be witch separator ':'. You
can use "hh:mm" or "hh:mm:ss".}
function GetTimeFromStr(Value: string): TDateTime;
{:Decode string representation of TimeZone (CEST, GMT, +0200, -0800, etc.)
to timezone offset.}
function DecodeTimeZone(Value: string; var Zone: integer): Boolean;
{:Decode string in format "m-d-y" to TDateTime type.}
function GetDateMDYFromStr(Value: string): TDateTime;
{:Decode various string representations of date and time to Tdatetime type.
This function do all timezone corrections too! This function can decode lot of
formats like:
@longcode(#
ddd, d mmm yyyy hh:mm:ss
ddd, d mmm yy hh:mm:ss
ddd, mmm d yyyy hh:mm:ss
ddd mmm dd hh:mm:ss yyyy #)
and more with lot of modifications, include:
@longcode(#
Sun, 06 Nov 1994 08:49:37 GMT ; RFC 822, updated by RFC 1123
Sunday, 06-Nov-94 08:49:37 GMT ; RFC 850, obsoleted by RFC 1036
Sun Nov 6 08:49:37 1994 ; ANSI C's asctime() Format
#)
Timezone corrections known lot of symbolic timezone names (like CEST, EDT, etc.)
or numeric representation (like +0200). By convention defined in RFC timezone
+0000 is GMT and -0000 is current your system timezone.}
function DecodeRfcDateTime(Value: string): TDateTime;
{:Return current system date and time in UTC timezone.}
function GetUTTime: TDateTime;
{:Set Newdt as current system date and time in UTC timezone. This function work
only if you have administrator rights!}
function SetUTTime(Newdt: TDateTime): Boolean;
{:Return current value of system timer with precizion 1 millisecond. Good for
measure time difference.}
function GetTick: LongWord;
{:Return difference between two timestamps. It working fine only for differences
smaller then maxint. (difference must be smaller then 24 days.)}
function TickDelta(TickOld, TickNew: LongWord): LongWord;
{:Return two characters, which ordinal values represents the value in byte
format. (High-endian)}
function CodeInt(Value: Word): Ansistring;
{:Decodes two characters located at "Index" offset position of the "Value"
string to Word values.}
function DecodeInt(const Value: Ansistring; Index: Integer): Word;
{:Return four characters, which ordinal values represents the value in byte
format. (High-endian)}
function CodeLongInt(Value: LongInt): Ansistring;
{:Decodes four characters located at "Index" offset position of the "Value"
string to LongInt values.}
function DecodeLongInt(const Value: Ansistring; Index: Integer): LongInt;
{:Dump binary buffer stored in a string to a result string.}
function DumpStr(const Buffer: Ansistring): string;
{:Dump binary buffer stored in a string to a result string. All bytes with code
of character is written as character, not as hexadecimal value.}
function DumpExStr(const Buffer: Ansistring): string;
{:Dump binary buffer stored in a string to a file with DumpFile filename.}
procedure Dump(const Buffer: AnsiString; DumpFile: string);
{:Dump binary buffer stored in a string to a file with DumpFile filename. All
bytes with code of character is written as character, not as hexadecimal value.}
procedure DumpEx(const Buffer: AnsiString; DumpFile: string);
{:Like TrimLeft, but remove only spaces, not control characters!}
function TrimSPLeft(const S: string): string;
{:Like TrimRight, but remove only spaces, not control characters!}
function TrimSPRight(const S: string): string;
{:Like Trim, but remove only spaces, not control characters!}
function TrimSP(const S: string): string;
{:Returns a portion of the "Value" string located to the left of the "Delimiter"
string. If a delimiter is not found, results is original string.}
function SeparateLeft(const Value, Delimiter: string): string;
{:Returns the portion of the "Value" string located to the right of the
"Delimiter" string. If a delimiter is not found, results is original string.}
function SeparateRight(const Value, Delimiter: string): string;
{:Returns parameter value from string in format:
parameter1="value1"; parameter2=value2}
function GetParameter(const Value, Parameter: string): string;
{:parse value string with elements differed by Delimiter into stringlist.}
procedure ParseParametersEx(Value, Delimiter: string; const Parameters: TStrings);
{:parse value string with elements differed by ';' into stringlist.}
procedure ParseParameters(Value: string; const Parameters: TStrings);
{:Index of string in stringlist with same beginning as Value is returned.}
function IndexByBegin(Value: string; const List: TStrings): integer;
{:Returns only the e-mail portion of an address from the full address format.
i.e. returns 'nobody@@somewhere.com' from '"someone" <nobody@@somewhere.com>'}
function GetEmailAddr(const Value: string): string;
{:Returns only the description part from a full address format. i.e. returns
'someone' from '"someone" <nobody@@somewhere.com>'}
function GetEmailDesc(Value: string): string;
{:Returns a string with hexadecimal digits representing the corresponding values
of the bytes found in "Value" string.}
function StrToHex(const Value: Ansistring): string;
{:Returns a string of binary "Digits" representing "Value".}
function IntToBin(Value: Integer; Digits: Byte): string;
{:Returns an integer equivalent of the binary string in "Value".
(i.e. ('10001010') returns 138)}
function BinToInt(const Value: string): Integer;
{:Parses a URL to its various components.}
function ParseURL(URL: string; var Prot, User, Pass, Host, Port, Path,
Para: string): string;
{:Replaces all "Search" string values found within "Value" string, with the
"Replace" string value.}
function ReplaceString(Value, Search, Replace: AnsiString): AnsiString;
{:It is like RPos, but search is from specified possition.}
function RPosEx(const Sub, Value: string; From: integer): Integer;
{:It is like POS function, but from right side of Value string.}
function RPos(const Sub, Value: String): Integer;
{:Like @link(fetch), but working with binary strings, not with text.}
function FetchBin(var Value: string; const Delimiter: string): string;
{:Fetch string from left of Value string.}
function Fetch(var Value: string; const Delimiter: string): string;
{:Fetch string from left of Value string. This function ignore delimitesr inside
quotations.}
function FetchEx(var Value: string; const Delimiter, Quotation: string): string;
{:If string is binary string (contains non-printable characters), then is
returned true.}
function IsBinaryString(const Value: AnsiString): Boolean;
{:return position of string terminator in string. If terminator found, then is
returned in terminator parameter.
Possible line terminators are: CRLF, LFCR, CR, LF}
function PosCRLF(const Value: AnsiString; var Terminator: AnsiString): integer;
{:Delete empty strings from end of stringlist.}
Procedure StringsTrim(const value: TStrings);
{:Like Pos function, buf from given string possition.}
function PosFrom(const SubStr, Value: String; From: integer): integer;
{$IFNDEF CIL}
{:Increase pointer by value.}
function IncPoint(const p: pointer; Value: integer): pointer;
{$ENDIF}
{:Get string between PairBegin and PairEnd. This function respect nesting.
For example:
@longcode(#
Value is: 'Hi! (hello(yes!))'
pairbegin is: '('
pairend is: ')'
In this case result is: 'hello(yes!)'#)}
function GetBetween(const PairBegin, PairEnd, Value: string): string;
{:Return count of Chr in Value string.}
function CountOfChar(const Value: string; Chr: char): integer;
{:Remove quotation from Value string. If Value is not quoted, then return same
string without any modification. }
function UnquoteStr(const Value: string; Quote: Char): string;
{:Quote Value string. If Value contains some Quote chars, then it is doubled.}
function QuoteStr(const Value: string; Quote: Char): string;
{:Convert lines in stringlist from 'name: value' form to 'name=value' form.}
procedure HeadersToList(const Value: TStrings);
{:Convert lines in stringlist from 'name=value' form to 'name: value' form.}
procedure ListToHeaders(const Value: TStrings);
{:swap bytes in integer.}
function SwapBytes(Value: integer): integer;
{:read string with requested length form stream.}
function ReadStrFromStream(const Stream: TStream; len: integer): AnsiString;
{:write string to stream.}
procedure WriteStrToStream(const Stream: TStream; Value: AnsiString);
{:Return filename of new temporary file in Dir (if empty, then default temporary
directory is used) and with optional filename prefix.}
function GetTempFile(const Dir, prefix: String): String;
{:Return padded string. If length is greater, string is truncated. If length is
smaller, string is padded by Pad character.}
function PadString(const Value: AnsiString; len: integer; Pad: AnsiChar): AnsiString;
{:XOR each byte in the strings}
function XorString(Indata1, Indata2: AnsiString): AnsiString;
{:Read header from "Value" stringlist beginning at "Index" position. If header
is Splitted into multiple lines, then this procedure de-split it into one line.}
function NormalizeHeader(Value: TStrings; var Index: Integer): string;
{pf}
{:Search for one of line terminators CR, LF or NUL. Return position of the
line beginning and length of text.}
procedure SearchForLineBreak(var APtr:PANSIChar; AEtx:PANSIChar; out ABol:PANSIChar; out ALength:integer);
{:Skip both line terminators CR LF (if any). Move APtr position forward.}
procedure SkipLineBreak(var APtr:PANSIChar; AEtx:PANSIChar);
{:Skip all blank lines in a buffer starting at APtr and move APtr position forward.}
procedure SkipNullLines (var APtr:PANSIChar; AEtx:PANSIChar);
{:Copy all lines from a buffer starting at APtr to ALines until empty line
or end of the buffer is reached. Move APtr position forward).}
procedure CopyLinesFromStreamUntilNullLine(var APtr:PANSIChar; AEtx:PANSIChar; ALines:TStrings);
{:Copy all lines from a buffer starting at APtr to ALines until ABoundary
or end of the buffer is reached. Move APtr position forward).}
procedure CopyLinesFromStreamUntilBoundary(var APtr:PANSIChar; AEtx:PANSIChar; ALines:TStrings; const ABoundary:ANSIString);
{:Search ABoundary in a buffer starting at APtr.
Return beginning of the ABoundary. Move APtr forward behind a trailing CRLF if any).}
function SearchForBoundary (var APtr:PANSIChar; AEtx:PANSIChar; const ABoundary:ANSIString): PANSIChar;
{:Compare a text at position ABOL with ABoundary and return position behind the
match (including a trailing CRLF if any).}
function MatchBoundary (ABOL,AETX:PANSIChar; const ABoundary:ANSIString): PANSIChar;
{:Compare a text at position ABOL with ABoundary + the last boundary suffix
and return position behind the match (including a trailing CRLF if any).}
function MatchLastBoundary (ABOL,AETX:PANSIChar; const ABoundary:ANSIString): PANSIChar;
{:Copy data from a buffer starting at position APtr and delimited by AEtx
position into ANSIString.}
function BuildStringFromBuffer (AStx,AEtx:PANSIChar): ANSIString;
{/pf}
var
{:can be used for your own months strings for @link(getmonthnumber)}
CustomMonthNames: array[1..12] of string;
implementation
uses
AnsiStrings;
{==============================================================================}
const
MyDayNames: array[1..7] of AnsiString =
('Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat');
var
MyMonthNames: array[0..6, 1..12] of String =
(
('Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', //rewrited by system locales
'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'),
('Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', //English
'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'),
('jan', 'fév', 'mar', 'avr', 'mai', 'jun', //French
'jul', 'aoû', 'sep', 'oct', 'nov', 'déc'),
('jan', 'fev', 'mar', 'avr', 'mai', 'jun', //French#2
'jul', 'aou', 'sep', 'oct', 'nov', 'dec'),
('Jan', 'Feb', 'Mar', 'Apr', 'Mai', 'Jun', //German
'Jul', 'Aug', 'Sep', 'Okt', 'Nov', 'Dez'),
('Jan', 'Feb', 'Mär', 'Apr', 'Mai', 'Jun', //German#2
'Jul', 'Aug', 'Sep', 'Okt', 'Nov', 'Dez'),
('Led', 'Úno', 'Bøe', 'Dub', 'Kvì', 'Èen', //Czech
'Èec', 'Srp', 'Záø', 'Øíj', 'Lis', 'Pro')
);
{==============================================================================}
function TimeZoneBias: integer;
{$IFNDEF MSWINDOWS}
{$IFNDEF FPC}
var
{$IFDEF POSIX}
t: Posix.SysTypes.time_t;
UT: Posix.time.tm;
{$ELSE}
t: TTime_T;
UT: TUnixTime;
{$ENDIF}
begin
{$IFDEF POSIX}
__time(T);
localtime_r(T, UT);
Result := UT.tm_gmtoff div 60;
{$ELSE}
__time(@T);
localtime_r(@T, UT);
Result := ut.__tm_gmtoff div 60;
{$ENDIF}
{$ELSE}
begin
Result := TZSeconds div 60;
{$ENDIF}
{$ELSE}
var
zoneinfo: TTimeZoneInformation;
bias: Integer;
begin
case GetTimeZoneInformation(Zoneinfo) of
2:
bias := zoneinfo.Bias + zoneinfo.DaylightBias;
1:
bias := zoneinfo.Bias + zoneinfo.StandardBias;
else
bias := zoneinfo.Bias;
end;
Result := bias * (-1);
{$ENDIF}
end;
{==============================================================================}
function TimeZone: string;
var
bias: Integer;
h, m: Integer;
begin
bias := TimeZoneBias;
if bias >= 0 then
Result := '+'
else
Result := '-';
bias := Abs(bias);
h := bias div 60;
m := bias mod 60;
Result := Result + Format('%.2d%.2d', [h, m]);
end;
{==============================================================================}
function Rfc822DateTime(t: TDateTime): string;
var
wYear, wMonth, wDay: word;
begin
DecodeDate(t, wYear, wMonth, wDay);
Result := Format('%s, %d %s %s %s', [MyDayNames[DayOfWeek(t)], wDay,
MyMonthNames[1, wMonth], FormatDateTime('yyyy hh":"nn":"ss', t), TimeZone]);
end;
{==============================================================================}
function CDateTime(t: TDateTime): string;
var
wYear, wMonth, wDay: word;
begin
DecodeDate(t, wYear, wMonth, wDay);
Result:= Format('%s %2d %s', [MyMonthNames[1, wMonth], wDay,
FormatDateTime('hh":"nn":"ss', t)]);
end;
{==============================================================================}
function SimpleDateTime(t: TDateTime): string;
begin
Result := FormatDateTime('yymmdd hhnnss', t);
end;
{==============================================================================}
function AnsiCDateTime(t: TDateTime): string;
var
wYear, wMonth, wDay: word;
begin
DecodeDate(t, wYear, wMonth, wDay);
Result := Format('%s %s %d %s', [MyDayNames[DayOfWeek(t)], MyMonthNames[1, wMonth],
wDay, FormatDateTime('hh":"nn":"ss yyyy ', t)]);
end;
{==============================================================================}
function DecodeTimeZone(Value: string; var Zone: integer): Boolean;
var
x: integer;
zh, zm: integer;
s: string;
begin
Result := false;
s := Value;
if (Pos('+', s) = 1) or (Pos('-',s) = 1) then
begin
if s = '-0000' then
Zone := TimeZoneBias
else
if Length(s) > 4 then
begin
zh := StrToIntdef(s[2] + s[3], 0);
zm := StrToIntdef(s[4] + s[5], 0);
zone := zh * 60 + zm;
if s[1] = '-' then
zone := zone * (-1);
end;
Result := True;
end
else
begin
x := 32767;
if s = 'NZDT' then x := 13;
if s = 'IDLE' then x := 12;
if s = 'NZST' then x := 12;
if s = 'NZT' then x := 12;
if s = 'EADT' then x := 11;
if s = 'GST' then x := 10;
if s = 'JST' then x := 9;
if s = 'CCT' then x := 8;
if s = 'WADT' then x := 8;
if s = 'WAST' then x := 7;
if s = 'ZP6' then x := 6;
if s = 'ZP5' then x := 5;
if s = 'ZP4' then x := 4;
if s = 'BT' then x := 3;
if s = 'EET' then x := 2;
if s = 'MEST' then x := 2;
if s = 'MESZ' then x := 2;
if s = 'SST' then x := 2;
if s = 'FST' then x := 2;
if s = 'CEST' then x := 2;
if s = 'CET' then x := 1;
if s = 'FWT' then x := 1;
if s = 'MET' then x := 1;
if s = 'MEWT' then x := 1;
if s = 'SWT' then x := 1;
if s = 'UT' then x := 0;
if s = 'UTC' then x := 0;
if s = 'GMT' then x := 0;
if s = 'WET' then x := 0;
if s = 'WAT' then x := -1;
if s = 'BST' then x := -1;
if s = 'AT' then x := -2;
if s = 'ADT' then x := -3;
if s = 'AST' then x := -4;
if s = 'EDT' then x := -4;
if s = 'EST' then x := -5;
if s = 'CDT' then x := -5;
if s = 'CST' then x := -6;
if s = 'MDT' then x := -6;
if s = 'MST' then x := -7;
if s = 'PDT' then x := -7;
if s = 'PST' then x := -8;
if s = 'YDT' then x := -8;
if s = 'YST' then x := -9;
if s = 'HDT' then x := -9;
if s = 'AHST' then x := -10;
if s = 'CAT' then x := -10;
if s = 'HST' then x := -10;
if s = 'EAST' then x := -10;
if s = 'NT' then x := -11;
if s = 'IDLW' then x := -12;
if x <> 32767 then
begin
zone := x * 60;
Result := True;
end;
end;
end;
{==============================================================================}
function GetMonthNumber(Value: String): integer;
var
n: integer;
function TestMonth(Value: String; Index: Integer): Boolean;
var
n: integer;
begin
Result := False;
for n := 0 to 6 do
if Value = AnsiUppercase(MyMonthNames[n, Index]) then
begin
Result := True;
Break;
end;
end;
begin
Result := 0;
Value := AnsiUppercase(Value);
for n := 1 to 12 do
if TestMonth(Value, n) or (Value = AnsiUppercase(CustomMonthNames[n])) then
begin
Result := n;
Break;
end;
end;
{==============================================================================}
function GetTimeFromStr(Value: string): TDateTime;
var
x: integer;
begin
x := rpos(':', Value);
if (x > 0) and ((Length(Value) - x) > 2) then
Value := Copy(Value, 1, x + 2);
Value := ReplaceString(Value, ':', {$IFDEF COMPILER15_UP}FormatSettings.{$ENDIF}TimeSeparator);
Result := -1;
try
Result := StrToTime(Value);
except
on Exception do ;
end;
end;
{==============================================================================}
function GetDateMDYFromStr(Value: string): TDateTime;
var
wYear, wMonth, wDay: word;
s: string;
begin
Result := 0;
s := Fetch(Value, '-');
wMonth := StrToIntDef(s, 12);
s := Fetch(Value, '-');
wDay := StrToIntDef(s, 30);
wYear := StrToIntDef(Value, 1899);
if wYear < 1000 then
if (wYear > 99) then
wYear := wYear + 1900
else
if wYear > 50 then
wYear := wYear + 1900
else
wYear := wYear + 2000;
try
Result := EncodeDate(wYear, wMonth, wDay);
except
on Exception do ;
end;
end;
{==============================================================================}
function DecodeRfcDateTime(Value: string): TDateTime;
var
day, month, year: Word;
zone: integer;
x, y: integer;
s: string;
t: TDateTime;
begin
// ddd, d mmm yyyy hh:mm:ss
// ddd, d mmm yy hh:mm:ss
// ddd, mmm d yyyy hh:mm:ss
// ddd mmm dd hh:mm:ss yyyy
// Sun, 06 Nov 1994 08:49:37 GMT ; RFC 822, updated by RFC 1123
// Sunday, 06-Nov-94 08:49:37 GMT ; RFC 850, obsoleted by RFC 1036
// Sun Nov 6 08:49:37 1994 ; ANSI C's asctime() Format
Result := 0;
if Value = '' then
Exit;
day := 0;
month := 0;
year := 0;
zone := 0;
Value := ReplaceString(Value, ' -', ' #');
Value := ReplaceString(Value, '-', ' ');
Value := ReplaceString(Value, ' #', ' -');
while Value <> '' do
begin
s := Fetch(Value, ' ');
s := uppercase(s);
// timezone
if DecodetimeZone(s, x) then
begin
zone := x;
continue;
end;
x := StrToIntDef(s, 0);
// day or year
if x > 0 then
if (x < 32) and (day = 0) then
begin
day := x;
continue;
end
else
begin
if (year = 0) and ((month > 0) or (x > 12)) then
begin
year := x;
if year < 32 then
year := year + 2000;
if year < 1000 then
year := year + 1900;
continue;
end;
end;
// time
if rpos(':', s) > Pos(':', s) then
begin
t := GetTimeFromStr(s);
if t <> -1 then
Result := t;
continue;
end;
//timezone daylight saving time
if s = 'DST' then
begin
zone := zone + 60;
continue;
end;
// month
y := GetMonthNumber(s);
if (y > 0) and (month = 0) then
month := y;
end;
if year = 0 then
year := 1980;
if month < 1 then
month := 1;
if month > 12 then
month := 12;
if day < 1 then
day := 1;
x := MonthDays[IsLeapYear(year), month];
if day > x then
day := x;
Result := Result + Encodedate(year, month, day);
zone := zone - TimeZoneBias;
x := zone div 1440;
Result := Result - x;
zone := zone mod 1440;
t := EncodeTime(Abs(zone) div 60, Abs(zone) mod 60, 0, 0);
if zone < 0 then
t := 0 - t;
Result := Result - t;
end;
{==============================================================================}
function GetUTTime: TDateTime;
{$IFDEF MSWINDOWS}
{$IFNDEF FPC}
var
st: TSystemTime;
begin
GetSystemTime(st);
result := SystemTimeToDateTime(st);
{$ELSE}
var
st: SysUtils.TSystemTime;
stw: Windows.TSystemTime;
begin
GetSystemTime(stw);
st.Year := stw.wYear;
st.Month := stw.wMonth;
st.Day := stw.wDay;
st.Hour := stw.wHour;
st.Minute := stw.wMinute;
st.Second := stw.wSecond;
st.Millisecond := stw.wMilliseconds;
result := SystemTimeToDateTime(st);
{$ENDIF}
{$ELSE MSWINDOWS}
{$IFNDEF FPC}
var
TV: TTimeVal;
begin
gettimeofday(TV, nil);
Result := UnixDateDelta + (TV.tv_sec + TV.tv_usec / 1000000) / 86400;
{$ELSE FPC}
{$IFDEF UNIX}
var
TV: TimeVal;
begin
fpgettimeofday(@TV, nil);
Result := UnixDateDelta + (TV.tv_sec + TV.tv_usec / 1000000) / 86400;
{$ELSE UNIX}
{$IFDEF OS2}
var
ST: TSystemTime;
begin
GetLocalTime (ST);
Result := SystemTimeToDateTime (ST);
{$ENDIF OS2}
{$ENDIF UNIX}
{$ENDIF FPC}
{$ENDIF MSWINDOWS}
end;
{==============================================================================}
function SetUTTime(Newdt: TDateTime): Boolean;
{$IFDEF MSWINDOWS}
{$IFNDEF FPC}
var
st: TSystemTime;
begin
DateTimeToSystemTime(newdt,st);
Result := SetSystemTime(st);
{$ELSE}
var
st: SysUtils.TSystemTime;
stw: Windows.TSystemTime;
begin
DateTimeToSystemTime(newdt,st);
stw.wYear := st.Year;
stw.wMonth := st.Month;
stw.wDay := st.Day;
stw.wHour := st.Hour;
stw.wMinute := st.Minute;
stw.wSecond := st.Second;
stw.wMilliseconds := st.Millisecond;
Result := SetSystemTime(stw);
{$ENDIF}
{$ELSE MSWINDOWS}
{$IFNDEF FPC}
var
TV: TTimeVal;
d: double;
TZ: Ttimezone;
PZ: PTimeZone;
begin
TZ.tz_minuteswest := 0;
TZ.tz_dsttime := 0;
PZ := @TZ;
gettimeofday(TV, PZ);
d := (newdt - UnixDateDelta) * 86400;
TV.tv_sec := trunc(d);
TV.tv_usec := trunc(frac(d) * 1000000);
{$IFNDEF POSIX}
Result := settimeofday(TV, TZ) <> -1;
{$ELSE}
Result := False; // in POSIX settimeofday is not defined? http://www.kernel.org/doc/man-pages/online/pages/man2/gettimeofday.2.html
{$ENDIF}
{$ELSE FPC}
{$IFDEF UNIX}
var
TV: TimeVal;
d: double;
begin
d := (newdt - UnixDateDelta) * 86400;
TV.tv_sec := trunc(d);
TV.tv_usec := trunc(frac(d) * 1000000);
Result := fpsettimeofday(@TV, nil) <> -1;
{$ELSE UNIX}
{$IFDEF OS2}
var
ST: TSystemTime;
begin
DateTimeToSystemTime (NewDT, ST);
SetTime (ST.Hour, ST.Minute, ST.Second, ST.Millisecond div 10);
Result := true;
{$ENDIF OS2}
{$ENDIF UNIX}
{$ENDIF FPC}
{$ENDIF MSWINDOWS}
end;
{==============================================================================}
{$IFNDEF MSWINDOWS}
function GetTick: LongWord;
var
Stamp: TTimeStamp;
begin
Stamp := DateTimeToTimeStamp(Now);
Result := Stamp.Time;
end;
{$ELSE}
function GetTick: LongWord;
var
tick, freq: TLargeInteger;
{$IFDEF VER100}
x: TLargeInteger;
{$ENDIF}
begin
if Windows.QueryPerformanceFrequency(freq) then
begin
Windows.QueryPerformanceCounter(tick);
{$IFDEF VER100}
x.QuadPart := (tick.QuadPart / freq.QuadPart) * 1000;
Result := x.LowPart;
{$ELSE}
Result := Trunc((tick / freq) * 1000) and High(LongWord)
{$ENDIF}
end
else
Result := Windows.GetTickCount;
end;
{$ENDIF}
{==============================================================================}
function TickDelta(TickOld, TickNew: LongWord): LongWord;
begin
//if DWord is signed type (older Deplhi),
// then it not work properly on differencies larger then maxint!
Result := 0;
if TickOld <> TickNew then
begin
if TickNew < TickOld then
begin
TickNew := TickNew + LongWord(MaxInt) + 1;
TickOld := TickOld + LongWord(MaxInt) + 1;
end;
Result := TickNew - TickOld;
if TickNew < TickOld then
if Result > 0 then
Result := 0 - Result;
end;
end;
{==============================================================================}
function CodeInt(Value: Word): Ansistring;
begin
setlength(result, 2);
result[1] := AnsiChar(Value div 256);
result[2] := AnsiChar(Value mod 256);
// Result := AnsiChar(Value div 256) + AnsiChar(Value mod 256)
end;
{==============================================================================}
function DecodeInt(const Value: Ansistring; Index: Integer): Word;
var
x, y: Byte;
begin
if Length(Value) > Index then
x := Ord(Value[Index])
else
x := 0;
if Length(Value) >= (Index + 1) then
y := Ord(Value[Index + 1])
else
y := 0;
Result := x * 256 + y;
end;
{==============================================================================}
function CodeLongInt(Value: Longint): Ansistring;
var
x, y: word;
begin
// this is fix for negative numbers on systems where longint = integer
x := (Value shr 16) and integer($ffff);
y := Value and integer($ffff);
setlength(result, 4);
result[1] := AnsiChar(x div 256);
result[2] := AnsiChar(x mod 256);
result[3] := AnsiChar(y div 256);
result[4] := AnsiChar(y mod 256);
end;
{==============================================================================}
function DecodeLongInt(const Value: Ansistring; Index: Integer): LongInt;
var
x, y: Byte;
xl, yl: Byte;
begin