forked from jasder/antlr
129 lines
4.0 KiB
C#
129 lines
4.0 KiB
C#
/*
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* [The "BSD license"]
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* Copyright (c) 2013 Terence Parr
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* Copyright (c) 2013 Sam Harwell
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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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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using Antlr4.Runtime.Misc;
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using Sharpen;
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namespace Antlr4.Runtime.Misc
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{
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public class Utils
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{
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public static int NumNonnull(object[] data)
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{
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int n = 0;
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if (data == null)
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{
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return n;
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}
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foreach (object o in data)
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{
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if (o != null)
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{
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n++;
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}
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}
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return n;
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}
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public static void RemoveAllElements<T>(ICollection<T> data, T value)
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{
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if (data == null)
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{
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return;
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}
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while (data.Contains(value))
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{
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data.Remove(value);
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}
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}
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public static string EscapeWhitespace(string s, bool escapeSpaces)
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{
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StringBuilder buf = new StringBuilder();
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foreach (char c in s.ToCharArray())
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{
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if (c == ' ' && escapeSpaces)
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{
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buf.Append('\u00B7');
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}
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else
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{
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if (c == '\t')
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{
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buf.Append("\\t");
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}
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else
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{
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if (c == '\n')
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{
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buf.Append("\\n");
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}
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else
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{
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if (c == '\r')
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{
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buf.Append("\\r");
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}
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else
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{
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buf.Append(c);
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}
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}
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}
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}
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}
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return buf.ToString();
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}
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public static void RemoveAll<T, _T1>(IList<T> list, Predicate<_T1> predicate)
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{
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int j = 0;
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for (int i = 0; i < list.Count; i++)
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{
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T item = list[i];
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if (!predicate.Eval(item))
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{
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if (j != i)
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{
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list.Set(j, item);
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}
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j++;
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}
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}
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if (j < list.Count)
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{
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list.SubList(j, list.Count).Clear();
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}
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}
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}
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}
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