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#Region "Microsoft.VisualBasic::208fbfa9b3a38cd9b3df433f5066f6db, Microsoft.VisualBasic.Core\Scripting\Runtime\CType\Casting.vb"
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#End Region
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Imports System.Drawing
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Imports System.IO
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Imports System.Runtime.CompilerServices
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Imports System.Text
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Imports System.Text.RegularExpressions
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Imports Microsoft.VisualBasic.ApplicationServices.Debugging.Logging
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Imports Microsoft.VisualBasic.CommandLine.Reflection
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Imports Microsoft.VisualBasic.ComponentModel
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Imports Microsoft.VisualBasic.ComponentModel.Ranges.Model
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Imports Microsoft.VisualBasic.Imaging
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Imports Microsoft.VisualBasic.Text
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Imports Microsoft.VisualBasic.ValueTypes
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Namespace Scripting.Runtime
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Public Module Casting
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<Extension>
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Public Function TryParse(Of T As Structure)(expression As Match, Optional [default] As T = Nothing) As T
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Dim result As T = Nothing
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If [Enum].TryParse(Of T)(expression.Value, result) Then
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Return result
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Else
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Return [default]
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End If
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End Function
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<MethodImpl(MethodImplOptions.AggressiveInlining)>
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<Extension>
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Public Function ScriptValue(size As Size) As String
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Return $"{size.Width},{size.Height}"
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End Function
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<Extension>
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Public Iterator Function [As](Of T)(source As IEnumerable) As IEnumerable(Of T)
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Dim l As New List(Of Object)
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For Each x In source
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l.Add(x)
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If l.Count > 1 Then
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Exit For
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End If
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Next
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If l.Count = 1 AndAlso Not l.First.GetType Is GetType(T) Then
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Dim x = l.First
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With DirectCast(x, IEnumerator)
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Do While .MoveNext
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Yield DirectCast(.Current, T)
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Loop
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End With
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Else
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For Each o As Object In source
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Yield DirectCast(o, T)
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Next
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End If
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End Function
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<MethodImpl(MethodImplOptions.AggressiveInlining)>
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<Extension>
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Public Function NumericRangeParser(exp As String) As DoubleRange
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Return CType(exp, DoubleRange)
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End Function
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<MethodImpl(MethodImplOptions.AggressiveInlining)>
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<Extension>
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Public Function [As](Of T As {IComparable(Of T), Structure})(x As Double) As T
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Return CType(CObj(x), T)
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End Function
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<MethodImpl(MethodImplOptions.AggressiveInlining)>
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<Extension>
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Public Function Expression(size As Size) As String
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With size
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Return $"{ .Width},{ .Height}"
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End With
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End Function
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<MethodImpl(MethodImplOptions.AggressiveInlining)>
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<Extension>
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Public Function Expression(size As SizeF) As String
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With size
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Return $"{ .Width},{ .Height}"
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End With
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End Function
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Public Function PointParser(pt$) As Point
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Dim x, y As Double
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Call Ranges.Parser(pt, x, y)
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Return New Point(x, y)
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End Function
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Public Function FloatPointParser(pt$) As PointF
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Dim x, y As Double
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Call Ranges.Parser(pt, x, y)
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Return New PointF(x, y)
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End Function
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<MethodImpl(MethodImplOptions.AggressiveInlining)>
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<Extension> Public Function SizeParser(pt$) As Size
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Return pt.FloatSizeParser.ToSize
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End Function
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<Extension>
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Public Function FloatSizeParser(pt$) As SizeF
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If pt.StringEmpty Then
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Return Nothing
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Else
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Dim x, y As Double
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Call Ranges.Parser(pt, x, y)
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Return New SizeF(x, y)
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End If
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End Function
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<MethodImpl(MethodImplOptions.AggressiveInlining)>
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<Extension>
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Public Function AsBaseType(Of TIn As Class, T)(obj As TIn) As T
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If obj Is Nothing Then
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Return Nothing
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Else
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Return DirectCast(CObj(obj), T)
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End If
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End Function
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<Extension> Public Function [As](Of T, TOut)(list As IEnumerable(Of T)) As TOut()
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If list Is Nothing Then
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Return {}
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Else
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Return list _
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.Select(Function(x) CType(CObj(x), TOut)) _
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.ToArray
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End If
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End Function
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Public Const RegexpDouble$ = "-?\d+(\.\d+)?"
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Public Const ScientificNotation$ = RegexpDouble & "[Ee][+-]\d+"
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Public Const RegexpFloat$ = RegexpDouble & "([Ee][+-]\d+)?"
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Public Const RegexInteger$ = "[-]?\d+"
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<MethodImpl(MethodImplOptions.AggressiveInlining)>
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<ExportAPI("Double.Match")>
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<Extension> Public Function RegexParseDouble(s As String) As Double
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Return Val(s.Match(RegexpFloat))
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End Function
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<Extension>
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Public Function ParseNumeric(s As String) As Double
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s = Strings.Trim(s)
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If String.IsNullOrEmpty(s) Then
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Return 0R
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ElseIf String.Equals(s, "NaN", StringComparison.Ordinal) OrElse
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String.Equals(s, "NA", StringComparison.Ordinal) Then
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Return Double.NaN
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Else
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s = s.Replace(",", "")
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End If
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If s.Last = "%"c Then
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Return Conversion.Val(Mid(s, 1, s.Length - 1)) / 100
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ElseIf InStr(s, "/") > 0 Then
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Dim t$() = s.Split("/"c)
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Return Val(t(0)) / Val(t(1))
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ElseIf InStr(s, "e", CompareMethod.Text) > 0 Then
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Dim t = s.ToLower.Split("e"c)
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Return Val(t(0)) * (10 ^ Val(t(1)))
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Else
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Return Conversion.Val(s)
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End If
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End Function
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<MethodImpl(MethodImplOptions.AggressiveInlining)>
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Public Function CastChar(obj As String) As Char
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Return If(String.IsNullOrEmpty(obj), ASCII.NUL, obj.First)
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End Function
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<MethodImpl(MethodImplOptions.AggressiveInlining)>
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Public Function CastInteger(obj As String) As Integer
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Return CInt(ParseNumeric(obj))
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End Function
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<MethodImpl(MethodImplOptions.AggressiveInlining)>
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Public Function CastLong(obj As String) As Long
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Return CLng(ParseNumeric(obj))
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End Function
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<MethodImpl(MethodImplOptions.AggressiveInlining)>
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Public Function CastCharArray(obj As String) As Char()
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Return obj.ToArray
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End Function
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<MethodImpl(MethodImplOptions.AggressiveInlining)>
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Public Function CastDate(obj As String) As DateTime
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If obj.StringEmpty OrElse obj = "0000-00-00 00:00:00" OrElse obj.ToUpper = "NULL" OrElse obj.ToUpper = "NA" Then
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Return New Date
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ElseIf obj.IsPattern("\d+") Then
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Return CLng(Val(obj)).FromUnixTimeStamp
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Else
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Return DateTime.Parse(obj)
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End If
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End Function
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<MethodImpl(MethodImplOptions.AggressiveInlining)>
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Public Function CastStringBuilder(obj As String) As StringBuilder
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Return New StringBuilder(obj)
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End Function
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<MethodImpl(MethodImplOptions.AggressiveInlining)>
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Public Function CastCommandLine(obj As String) As CommandLine.CommandLine
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Return CommandLine.TryParse(obj)
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End Function
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<MethodImpl(MethodImplOptions.AggressiveInlining)>
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Public Function CastImage(path As String) As Image
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Return LoadImage(path)
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End Function
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<MethodImpl(MethodImplOptions.AggressiveInlining)>
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Public Function CastFileInfo(path As String) As FileInfo
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Return FileIO.FileSystem.GetFileInfo(path)
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End Function
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<MethodImpl(MethodImplOptions.AggressiveInlining)>
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Public Function CastGDIPlusDeviceHandle(path As String) As Graphics2D
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Return CanvasCreateFromImageFile(path)
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End Function
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<MethodImpl(MethodImplOptions.AggressiveInlining)>
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Public Function CastFont(face As String) As Font
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Return New Font(face, 10)
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End Function
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<MethodImpl(MethodImplOptions.AggressiveInlining)>
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Public Function CastIPEndPoint(addr As String) As System.Net.IPEndPoint
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Return New Net.IPEndPoint(addr).GetIPEndPoint
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End Function
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<MethodImpl(MethodImplOptions.AggressiveInlining)>
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Public Function CastLogFile(path As String) As LogFile
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Return New LogFile(path)
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End Function
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<MethodImpl(MethodImplOptions.AggressiveInlining)>
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Public Function CastProcess(exe As String) As Process
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Return Process.Start(exe)
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End Function
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<MethodImpl(MethodImplOptions.AggressiveInlining)>
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Public Function CastSingle(n As String) As Single
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Return CSng(ParseNumeric(n))
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End Function
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Public Function CastRegexOptions(name As String) As RegexOptions
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If String.Equals(name, RegexExtensions.NameOf.Compiled, StringComparison.OrdinalIgnoreCase) Then
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Return RegexOptions.Compiled
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ElseIf String.Equals(name, RegexExtensions.NameOf.CultureInvariant, StringComparison.OrdinalIgnoreCase) Then
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Return RegexOptions.CultureInvariant
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ElseIf String.Equals(name, RegexExtensions.NameOf.ECMAScript, StringComparison.OrdinalIgnoreCase) Then
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Return RegexOptions.ECMAScript
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ElseIf String.Equals(name, RegexExtensions.NameOf.ExplicitCapture, StringComparison.OrdinalIgnoreCase) Then
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Return RegexOptions.ExplicitCapture
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ElseIf String.Equals(name, RegexExtensions.NameOf.IgnoreCase, StringComparison.OrdinalIgnoreCase) Then
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Return RegexOptions.IgnoreCase
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ElseIf String.Equals(name, RegexExtensions.NameOf.IgnorePatternWhitespace, StringComparison.OrdinalIgnoreCase) Then
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Return RegexOptions.IgnorePatternWhitespace
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ElseIf String.Equals(name, RegexExtensions.NameOf.Multiline, StringComparison.OrdinalIgnoreCase) Then
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Return RegexOptions.Multiline
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ElseIf String.Equals(name, RegexExtensions.NameOf.RightToLeft, StringComparison.OrdinalIgnoreCase) Then
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Return RegexOptions.RightToLeft
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ElseIf String.Equals(name, RegexExtensions.NameOf.Singleline, StringComparison.OrdinalIgnoreCase) Then
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Return RegexOptions.Singleline
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Else
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Return RegexOptions.None
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End If
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End Function
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End Module
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End Namespace
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