Int64NumberHeaderParser.cs

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using System.Globalization;
 
namespace System.Net.Http.Headers;
 
internal sealed class Int64NumberHeaderParser : BaseHeaderParser
{
    internal static readonly Int64NumberHeaderParser Parser = new Int64NumberHeaderParser();
 
    private Int64NumberHeaderParser()
        : base(supportsMultipleValues: false)
    {
    }
 
    public override string ToString(object value)
    {
        return ((long)value).ToString(NumberFormatInfo.InvariantInfo);
    }
 
    protected override int GetParsedValueLength(string value, int startIndex, object storeValue, out object parsedValue)
    {
        parsedValue = null;
        int numberLength = HttpRuleParser.GetNumberLength(value, startIndex, allowDecimal: false);
        if (numberLength == 0 || numberLength > 19)
        {
            return 0;
        }
        long result = 0L;
        if (!HeaderUtilities.TryParseInt64(value, startIndex, numberLength, out result))
        {
            return 0;
        }
        parsedValue = result;
        return numberLength;
    }
}