150 lines
4.3 KiB
VB.net
150 lines
4.3 KiB
VB.net
#Region "Microsoft.VisualBasic::a4409e16508515c3307575044399df24, Microsoft.VisualBasic.Core\Text\Parser\CharBuffer.vb"
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' Author:
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'
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' asuka (amethyst.asuka@gcmodeller.org)
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' xie (genetics@smrucc.org)
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' xieguigang (xie.guigang@live.com)
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'
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' Copyright (c) 2018 GPL3 Licensed
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'
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'
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' GNU GENERAL PUBLIC LICENSE (GPL3)
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'
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'
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' This program is free software: you can redistribute it and/or modify
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' it under the terms of the GNU General Public License as published by
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' the Free Software Foundation, either version 3 of the License, or
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' (at your option) any later version.
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'
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' This program is distributed in the hope that it will be useful,
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' but WITHOUT ANY WARRANTY; without even the implied warranty of
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' MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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' GNU General Public License for more details.
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'
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' You should have received a copy of the GNU General Public License
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' along with this program. If not, see <http://www.gnu.org/licenses/>.
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' /********************************************************************************/
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' Summaries:
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' Class CharBuffer
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'
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' Properties: Last, Size
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'
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' Function: GetLastOrDefault, PopAllChars, ToString
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'
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' Sub: Clear
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'
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' Operators: *, (+3 Overloads) +, <, <>, =
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' >
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'
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'
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' /********************************************************************************/
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#End Region
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Imports Microsoft.VisualBasic.Language
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Namespace Text.Parser
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Public Class CharBuffer
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ReadOnly buffer As New List(Of Char)
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Default Public ReadOnly Property GetChar(i As Integer) As Char
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Get
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Return buffer(i)
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End Get
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End Property
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''' <summary>
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''' get current size of the data in this char buffer object
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''' </summary>
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''' <returns></returns>
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Public ReadOnly Property Size As Integer
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Get
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Return buffer.Count
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End Get
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End Property
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Public ReadOnly Property Last As Char
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Get
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Return buffer(buffer.Count - 1)
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End Get
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End Property
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Public Function GetLastOrDefault() As Char
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If buffer.Count = 0 Then
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Return Nothing
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Else
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Return buffer(buffer.Count - 1)
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End If
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End Function
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Public Sub Clear()
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Call buffer.Clear()
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End Sub
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Public Function PopAllChars() As Char()
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Return buffer.PopAll
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End Function
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Public Overrides Function ToString() As String
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Return buffer.CharString
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End Function
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Public Shared Widening Operator CType(c As Char) As CharBuffer
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Return New CharBuffer + c
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End Operator
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Public Shared Operator +(buf As CharBuffer, c As Char) As CharBuffer
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buf.buffer.Add(c)
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Return buf
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End Operator
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Public Shared Operator +(buf As CharBuffer, c As Char?) As CharBuffer
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buf.buffer.Add(c)
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Return buf
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End Operator
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Public Shared Operator +(buf As CharBuffer, c As Value(Of Char)) As CharBuffer
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buf.buffer.Add(c.Value)
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Return buf
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End Operator
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Public Shared Operator *(buf As CharBuffer, n As Integer) As CharBuffer
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If n = 0 Then
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buf.Clear()
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Else
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Dim template As Char() = buf.buffer.ToArray
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For i As Integer = 1 To n - 1
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buf.buffer.AddRange(template)
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Next
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End If
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Return buf
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End Operator
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Public Shared Operator =(buf As CharBuffer, size As Integer) As Boolean
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Return buf.buffer.Count = size
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End Operator
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Public Shared Operator <>(buf As CharBuffer, size As Integer) As Boolean
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Return buf.buffer.Count <> size
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End Operator
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Public Shared Operator >(buf As CharBuffer, size As Integer) As Boolean
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Return buf.buffer.Count > size
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End Operator
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Public Shared Operator <(buf As CharBuffer, size As Integer) As Boolean
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Return buf.buffer.Count < size
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End Operator
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End Class
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End Namespace
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