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// Copyright 2009-2022 Josh Close
// This file is a part of CsvHelper and is dual licensed under MS-PL and Apache 2.0.
// See LICENSE.txt for details or visit http://www.opensource.org/licenses/ms-pl.html for MS-PL and http://opensource.org/licenses/Apache-2.0 for Apache 2.0.
// https://github.com/JoshClose/CsvHelper
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Text;
using System.Threading.Tasks;
namespace CsvHelper
{
/// <summary>
/// Methods to help with arrays.
/// </summary>
public static class ArrayHelper
{
/// <summary>
/// Trims the characters off the start and end of the buffer
/// by updating the start and length arguments.
/// </summary>
/// <param name="buffer">The buffer.</param>
/// <param name="start">The start.</param>
/// <param name="length">The length.</param>
/// <param name="trimChars">The characters to trim.</param>
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static void Trim(char[] buffer, ref int start, ref int length, char[] trimChars)
{
// Trim start.
for (var i = start; i < start + length; i++)
{
var c = buffer[i];
if (!Contains(trimChars, c))
{
break;
}
start++;
length--;
}
// Trim end.
for (var i = start + length - 1; i > start; i--)
{
var c = buffer[i];
if (!Contains(trimChars, c))
{
break;
}
length--;
}
}
/// <summary>
/// Determines whether this given array contains the given character.
/// </summary>
/// <param name="array">The array to search.</param>
/// <param name="c">The character to look for.</param>
/// <returns>
/// <c>true</c> if the array contains the characters, otherwise <c>false</c>.
/// </returns>
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static bool Contains(char[] array, in char c)
{
for (var i = 0; i < array.Length; i++)
{
if (array[i] == c)
{
return true;
}
}
return false;
}
}
}
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