wismna/modernkeepasslib
1
0
Fork 0
mirror of https://github.com/wismna/ModernKeePassLib.git synced 2025-10-03 23:50:20 -04:00
Code Issues Packages Projects Releases Wiki Activity

Setup solution

Browse Source
This commit is contained in:
Geoffroy BONNEVILLE
2019-07-25 16:39:43 +02:00
parent 81509be167
commit 1b2007e6dd
136 changed files with 35834 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

482
ModernKeePassLib/Utility/TimeUtil.cs Normal file
View File

@@ -0,0 +1,482 @@
/*
KeePass Password Safe - The Open-Source Password Manager
Copyright (C) 2003-2019 Dominik Reichl <dominik.reichl@t-online.de>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Globalization;
using System.Text;
using ModernKeePassLib.Interfaces;
namespace ModernKeePassLib.Utility
{
/// <summary>
/// Contains various static time structure manipulation and conversion
/// routines.
/// </summary>
public static class TimeUtil
{
/// <summary>
/// Length of a compressed <c>PW_TIME</c> structure in bytes.
/// </summary>
public const int PwTimeLength = 7;
public static readonly DateTime SafeMinValueUtc = new DateTime(
DateTime.MinValue.Ticks + TimeSpan.TicksPerDay, DateTimeKind.Utc);
public static readonly DateTime SafeMaxValueUtc = new DateTime(
DateTime.MaxValue.Ticks - TimeSpan.TicksPerDay, DateTimeKind.Utc);
#if !KeePassLibSD
private static string m_strDtfStd = null;
private static string m_strDtfDate = null;
#endif
// private static long m_lTicks2PowLess1s = 0;
private static DateTime? m_odtUnixRoot = null;
public static DateTime UnixRoot
{
get
{
if(m_odtUnixRoot.HasValue) return m_odtUnixRoot.Value;
DateTime dtRoot = new DateTime(1970, 1, 1, 0, 0, 0, 0,
DateTimeKind.Utc);
m_odtUnixRoot = dtRoot;
return dtRoot;
}
}
/// <summary>
/// Pack a <c>DateTime</c> object into 5 bytes. Layout: 2 zero bits,
/// year 12 bits, month 4 bits, day 5 bits, hour 5 bits, minute 6
/// bits, second 6 bits.
/// </summary>
[Obsolete]
public static byte[] PackTime(DateTime dt)
{
dt = ToLocal(dt, true);
byte[] pb = new byte[5];
// Pack time to 5 byte structure:
// Byte bits: 11111111 22222222 33333333 44444444 55555555
// Contents : 00YYYYYY YYYYYYMM MMDDDDDH HHHHMMMM MMSSSSSS
pb[0] = (byte)((dt.Year >> 6) & 0x3F);
pb[1] = (byte)(((dt.Year & 0x3F) << 2) | ((dt.Month >> 2) & 0x03));
pb[2] = (byte)(((dt.Month & 0x03) << 6) | ((dt.Day & 0x1F) << 1) |
((dt.Hour >> 4) & 0x01));
pb[3] = (byte)(((dt.Hour & 0x0F) << 4) | ((dt.Minute >> 2) & 0x0F));
pb[4] = (byte)(((dt.Minute & 0x03) << 6) | (dt.Second & 0x3F));
return pb;
}
/// <summary>
/// Unpack a packed time (5 bytes, packed by the <c>PackTime</c>
/// member function) to a <c>DateTime</c> object.
/// </summary>
/// <param name="pb">Packed time, 5 bytes.</param>
/// <returns>Unpacked <c>DateTime</c> object.</returns>
[Obsolete]
public static DateTime UnpackTime(byte[] pb)
{
Debug.Assert((pb != null) && (pb.Length == 5));
if(pb == null) throw new ArgumentNullException("pb");
if(pb.Length != 5) throw new ArgumentException();
int n1 = pb[0], n2 = pb[1], n3 = pb[2], n4 = pb[3], n5 = pb[4];
// Unpack 5 byte structure to date and time
int nYear = (n1 << 6) | (n2 >> 2);
int nMonth = ((n2 & 0x00000003) << 2) | (n3 >> 6);
int nDay = (n3 >> 1) & 0x0000001F;
int nHour = ((n3 & 0x00000001) << 4) | (n4 >> 4);
int nMinute = ((n4 & 0x0000000F) << 2) | (n5 >> 6);
int nSecond = n5 & 0x0000003F;
return (new DateTime(nYear, nMonth, nDay, nHour, nMinute,
nSecond, DateTimeKind.Local)).ToUniversalTime();
}
/// <summary>
/// Pack a <c>DateTime</c> object into 7 bytes (<c>PW_TIME</c>).
/// </summary>
/// <param name="dt">Object to be encoded.</param>
/// <returns>Packed time, 7 bytes (<c>PW_TIME</c>).</returns>
[Obsolete]
public static byte[] PackPwTime(DateTime dt)
{
Debug.Assert(PwTimeLength == 7);
dt = ToLocal(dt, true);
byte[] pb = new byte[7];
pb[0] = (byte)(dt.Year & 0xFF);
pb[1] = (byte)(dt.Year >> 8);
pb[2] = (byte)dt.Month;
pb[3] = (byte)dt.Day;
pb[4] = (byte)dt.Hour;
pb[5] = (byte)dt.Minute;
pb[6] = (byte)dt.Second;
return pb;
}
/// <summary>
/// Unpack a packed time (7 bytes, <c>PW_TIME</c>) to a <c>DateTime</c> object.
/// </summary>
/// <param name="pb">Packed time, 7 bytes.</param>
/// <returns>Unpacked <c>DateTime</c> object.</returns>
[Obsolete]
public static DateTime UnpackPwTime(byte[] pb)
{
Debug.Assert(PwTimeLength == 7);
Debug.Assert(pb != null); if(pb == null) throw new ArgumentNullException("pb");
Debug.Assert(pb.Length == 7); if(pb.Length != 7) throw new ArgumentException();
return (new DateTime(((int)pb[1] << 8) | (int)pb[0], (int)pb[2], (int)pb[3],
(int)pb[4], (int)pb[5], (int)pb[6], DateTimeKind.Local)).ToUniversalTime();
}
/// <summary>
/// Convert a <c>DateTime</c> object to a displayable string.
/// </summary>
/// <param name="dt"><c>DateTime</c> object to convert to a string.</param>
/// <returns>String representing the specified <c>DateTime</c> object.</returns>
public static string ToDisplayString(DateTime dt)
{
return ToLocal(dt, true).ToString();
}
public static string ToDisplayStringDateOnly(DateTime dt)
{
return ToLocal(dt, true).ToString("d");
}
public static DateTime FromDisplayString(string strDisplay)
{
DateTime dt;
if(FromDisplayStringEx(strDisplay, out dt)) return dt;
return DateTime.Now;
}
public static bool FromDisplayStringEx(string strDisplay, out DateTime dt)
{
#if KeePassLibSD
try { dt = ToLocal(DateTime.Parse(strDisplay), true); return true; }
catch(Exception) { }
#else
if(DateTime.TryParse(strDisplay, out dt))
{
dt = ToLocal(dt, true);
return true;
}
// For some custom formats specified using the Control Panel,
// DateTime.ToString returns the correct string, but
// DateTime.TryParse fails (e.g. for "//dd/MMM/yyyy");
// https://sourceforge.net/p/keepass/discussion/329221/thread/3a225b29/?limit=25&page=1#c6ae
if((m_strDtfStd == null) || (m_strDtfDate == null))
{
DateTime dtUni = new DateTime(2111, 3, 4, 5, 6, 7, DateTimeKind.Local);
m_strDtfStd = DeriveCustomFormat(ToDisplayString(dtUni), dtUni);
m_strDtfDate = DeriveCustomFormat(ToDisplayStringDateOnly(dtUni), dtUni);
}
const DateTimeStyles dts = DateTimeStyles.AllowWhiteSpaces;
if(DateTime.TryParseExact(strDisplay, m_strDtfStd, null, dts, out dt))
{
dt = ToLocal(dt, true);
return true;
}
if(DateTime.TryParseExact(strDisplay, m_strDtfDate, null, dts, out dt))
{
dt = ToLocal(dt, true);
return true;
}
#endif
Debug.Assert(false);
return false;
}
#if !KeePassLibSD
private static string DeriveCustomFormat(string strDT, DateTime dt)
{
string[] vPlh = new string[] {
// Names, sorted by length
"MMMM", "dddd",
"MMM", "ddd",
"gg", "g",
// Numbers, the ones with prefix '0' first
"yyyy", "yyy", "yy", "y",
"MM", "M",
"dd", "d",
"HH", "hh", "H", "h",
"mm", "m",
"ss", "s",
"tt", "t"
};
List<string> lValues = new List<string>();
foreach(string strPlh in vPlh)
{
string strEval = strPlh;
if(strEval.Length == 1) strEval = @"%" + strPlh; // Make custom
lValues.Add(dt.ToString(strEval));
}
StringBuilder sbAll = new StringBuilder();
sbAll.Append("dfFghHKmMstyz:/\"\'\\%");
sbAll.Append(strDT);
foreach(string strVEnum in lValues) { sbAll.Append(strVEnum); }
List<char> lCodes = new List<char>();
for(int i = 0; i < vPlh.Length; ++i)
{
char ch = StrUtil.GetUnusedChar(sbAll.ToString());
lCodes.Add(ch);
sbAll.Append(ch);
}
string str = strDT;
for(int i = 0; i < vPlh.Length; ++i)
{
string strValue = lValues[i];
if(string.IsNullOrEmpty(strValue)) continue;
str = str.Replace(strValue, new string(lCodes[i], 1));
}
StringBuilder sbFmt = new StringBuilder();
bool bInLiteral = false;
foreach(char ch in str)
{
int iCode = lCodes.IndexOf(ch);
// The escape character doesn't work correctly (e.g.
// "dd\\.MM\\.yyyy\\ HH\\:mm\\:ss" doesn't work, but
// "dd'.'MM'.'yyyy' 'HH':'mm':'ss" does); use '' instead
// if(iCode >= 0) sbFmt.Append(vPlh[iCode]);
// else // Literal
// {
// sbFmt.Append('\\');
// sbFmt.Append(ch);
// }
if(iCode >= 0)
{
if(bInLiteral) { sbFmt.Append('\''); bInLiteral = false; }
sbFmt.Append(vPlh[iCode]);
}
else // Literal
{
if(!bInLiteral) { sbFmt.Append('\''); bInLiteral = true; }
sbFmt.Append(ch);
}
}
if(bInLiteral) sbFmt.Append('\'');
return sbFmt.ToString();
}
#endif
public static string SerializeUtc(DateTime dt)
{
Debug.Assert(dt.Kind != DateTimeKind.Unspecified);
string str = ToUtc(dt, false).ToString("s");
if(!str.EndsWith("Z")) str += "Z";
return str;
}
public static bool TryDeserializeUtc(string str, out DateTime dt)
{
if(str == null) throw new ArgumentNullException("str");
if(str.EndsWith("Z")) str = str.Substring(0, str.Length - 1);
bool bResult = StrUtil.TryParseDateTime(str, out dt);
if(bResult) dt = ToUtc(dt, true);
return bResult;
}
public static double SerializeUnix(DateTime dt)
{
return (ToUtc(dt, false) - TimeUtil.UnixRoot).TotalSeconds;
}
public static DateTime ConvertUnixTime(double dtUnix)
{
try { return TimeUtil.UnixRoot.AddSeconds(dtUnix); }
catch(Exception) { Debug.Assert(false); }
return DateTime.UtcNow;
}
#if !KeePassLibSD
[Obsolete]
public static DateTime? ParseUSTextDate(string strDate)
{
return ParseUSTextDate(strDate, DateTimeKind.Unspecified);
}
private static string[] m_vUSMonths = null;
/// <summary>
/// Parse a US textual date string, like e.g. "January 02, 2012".
/// </summary>
public static DateTime? ParseUSTextDate(string strDate, DateTimeKind k)
{
if(strDate == null) { Debug.Assert(false); return null; }
if(m_vUSMonths == null)
m_vUSMonths = new string[] { "January", "February", "March",
"April", "May", "June", "July", "August", "September",
"October", "November", "December" };
string str = strDate.Trim();
for(int i = 0; i < m_vUSMonths.Length; ++i)
{
if(str.StartsWith(m_vUSMonths[i], StrUtil.CaseIgnoreCmp))
{
str = str.Substring(m_vUSMonths[i].Length);
string[] v = str.Split(new char[] { ',', ';' });
if((v == null) || (v.Length != 2)) return null;
string strDay = v[0].Trim().TrimStart('0');
int iDay, iYear;
if(int.TryParse(strDay, out iDay) &&
int.TryParse(v[1].Trim(), out iYear))
return new DateTime(iYear, i + 1, iDay, 0, 0, 0, k);
else { Debug.Assert(false); return null; }
}
}
return null;
}
#endif
private static readonly DateTime m_dtInvMin =
new DateTime(2999, 12, 27, 23, 59, 59, DateTimeKind.Utc);
private static readonly DateTime m_dtInvMax =
new DateTime(2999, 12, 29, 23, 59, 59, DateTimeKind.Utc);
public static int Compare(DateTime dtA, DateTime dtB, bool bUnkIsPast)
{
Debug.Assert(dtA.Kind == dtB.Kind);
if(bUnkIsPast)
{
// 2999-12-28 23:59:59 in KeePass 1.x means 'unknown';
// expect time zone corruption (twice)
// bool bInvA = ((dtA.Year == 2999) && (dtA.Month == 12) &&
// (dtA.Day >= 27) && (dtA.Day <= 29) && (dtA.Minute == 59) &&
// (dtA.Second == 59));
// bool bInvB = ((dtB.Year == 2999) && (dtB.Month == 12) &&
// (dtB.Day >= 27) && (dtB.Day <= 29) && (dtB.Minute == 59) &&
// (dtB.Second == 59));
// Faster due to internal implementation of DateTime:
bool bInvA = ((dtA >= m_dtInvMin) && (dtA <= m_dtInvMax) &&
(dtA.Minute == 59) && (dtA.Second == 59));
bool bInvB = ((dtB >= m_dtInvMin) && (dtB <= m_dtInvMax) &&
(dtB.Minute == 59) && (dtB.Second == 59));
if(bInvA) return (bInvB ? 0 : -1);
if(bInvB) return 1;
}
return dtA.CompareTo(dtB);
}
internal static int CompareLastMod(ITimeLogger tlA, ITimeLogger tlB,
bool bUnkIsPast)
{
if(tlA == null) { Debug.Assert(false); return ((tlB == null) ? 0 : -1); }
if(tlB == null) { Debug.Assert(false); return 1; }
return Compare(tlA.LastModificationTime, tlB.LastModificationTime,
bUnkIsPast);
}
public static DateTime ToUtc(DateTime dt, bool bUnspecifiedIsUtc)
{
DateTimeKind k = dt.Kind;
if(k == DateTimeKind.Utc) return dt;
if(k == DateTimeKind.Local) return dt.ToUniversalTime();
Debug.Assert(k == DateTimeKind.Unspecified);
if(bUnspecifiedIsUtc)
return new DateTime(dt.Ticks, DateTimeKind.Utc);
return dt.ToUniversalTime(); // Unspecified = local
}
public static DateTime ToLocal(DateTime dt, bool bUnspecifiedIsLocal)
{
DateTimeKind k = dt.Kind;
if(k == DateTimeKind.Local) return dt;
if(k == DateTimeKind.Utc) return dt.ToLocalTime();
Debug.Assert(k == DateTimeKind.Unspecified);
if(bUnspecifiedIsLocal)
return new DateTime(dt.Ticks, DateTimeKind.Local);
return dt.ToLocalTime(); // Unspecified = UTC
}
/* internal static DateTime RoundToMultOf2PowLess1s(DateTime dt)
{
long l2Pow = m_lTicks2PowLess1s;
if(l2Pow == 0)
{
l2Pow = 1;
while(true)
{
l2Pow <<= 1;
if(l2Pow >= TimeSpan.TicksPerSecond) break;
}
l2Pow >>= 1;
m_lTicks2PowLess1s = l2Pow;
Debug.Assert(TimeSpan.TicksPerSecond == 10000000L); // .NET
Debug.Assert(l2Pow == (1L << 23)); // .NET
}
long l = dt.Ticks;
if((l % l2Pow) == 0L) return dt;
// Round down to full second
l /= TimeSpan.TicksPerSecond;
l *= TimeSpan.TicksPerSecond;
// Round up to multiple of l2Pow
long l2PowM1 = l2Pow - 1L;
l = (l + l2PowM1) & ~l2PowM1;
DateTime dtRnd = new DateTime(l, dt.Kind);
Debug.Assert((dtRnd.Ticks % l2Pow) == 0L);
Debug.Assert(dtRnd.ToString("u") == dt.ToString("u"));
return dtRnd;
} */
}
}