109 lines
4.0 KiB
C#
109 lines
4.0 KiB
C#
//-----------------------------------------------------------------------
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//-----------------------------------------------------------------------
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// file="CodeLineHelper.cs"
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// Project: StgSharp
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// AuthorGroup: Nitload Space
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// Copyright (c) Nitload Space. All rights reserved.
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//
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// Permission is hereby granted, free of charge, to any person
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// obtaining a copy of this software and associated documentation
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// files (the “Software”), to deal in the Software without restriction,
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// including without limitation the rights to use, copy, modify, merge,
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// publish, distribute, sublicense, and/or sell copies of the Software,
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// and to permit persons to whom the Software is furnished to do so,
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// subject to the following conditions:
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//
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// The above copyright notice and
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// this permission notice shall be included in all copies
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// or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED “AS IS”,
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// WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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// ARISING FROM, OUT OF OR IN CONNECTION WITH
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// THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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//-----------------------------------------------------------------------
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//-----------------------------------------------------------------------
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using System;
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using System.Collections.Generic;
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using System.Text;
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namespace StgSharp.Script
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{
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public static class CodeLineHelper
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{
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public static string SliceAndTrim( this string line, int startIndex )
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{
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if( line == null ) {
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throw new ArgumentNullException( nameof( line ) );
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}
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if( startIndex < 0 || startIndex >= line.Length ) {
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throw new ArgumentOutOfRangeException( nameof( startIndex ) );
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}
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ReadOnlySpan<char> sourceSpan = line.AsSpan();
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ReadOnlySpan<char> subSpan = sourceSpan.Slice( startIndex );
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int start = 0;
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while( start < subSpan.Length && char.IsWhiteSpace(
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subSpan[ start ] ) ) {
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start++;
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}
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int end = subSpan.Length - 1;
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while( end >= start && char.IsWhiteSpace( subSpan[ end ] ) ) {
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end--;
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}
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if( start > end ) {
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return string.Empty;
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}
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int finalLength = end - start + 1;
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return new string( subSpan.Slice( start, finalLength ) );
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}
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public static string SliceAndTrim(
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this string line,
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int startIndex,
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int length )
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{
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if( line == null ) {
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throw new ArgumentNullException( nameof( line ) );
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}
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if( startIndex < 0 || startIndex >= line.Length ) {
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throw new ArgumentOutOfRangeException( nameof( startIndex ) );
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}
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if( length < 0 || startIndex + length > line.Length ) {
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throw new ArgumentOutOfRangeException( nameof( length ) );
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}
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ReadOnlySpan<char> sourceSpan = line.AsSpan();
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ReadOnlySpan<char> subSpan = sourceSpan.Slice( startIndex, length );
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int start = 0;
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while( start < subSpan.Length && char.IsWhiteSpace(
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subSpan[ start ] ) ) {
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start++;
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}
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int end = subSpan.Length - 1;
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while( end >= start && char.IsWhiteSpace( subSpan[ end ] ) ) {
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end--;
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}
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if( start > end ) {
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return string.Empty;
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}
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int finalLength = end - start + 1;
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return new string( subSpan.Slice( start, finalLength ) );
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}
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}
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}
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