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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
#nullable enable
namespace System.Buffers.Text
{
public static partial class Utf8Parser
{
/// <summary>
/// Parses a Byte at the start of a Utf8 string.
/// </summary>
/// <param name="source">The Utf8 string to parse</param>
/// <param name="value">Receives the parsed value</param>
/// <param name="bytesConsumed">On a successful parse, receives the length in bytes of the substring that was parsed </param>
/// <param name="standardFormat">Expected format of the Utf8 string</param>
/// <returns>
/// true for success. "bytesConsumed" contains the length in bytes of the substring that was parsed.
/// false if the string was not syntactically valid or an overflow or underflow occurred. "bytesConsumed" is set to 0.
/// </returns>
/// <remarks>
/// Formats supported:
/// G/g (default)
/// D/d 32767
/// N/n 32,767
/// X/x 7fff
/// </remarks>
/// <exceptions>
/// <cref>System.FormatException</cref> if the format is not valid for this data type.
/// </exceptions>
public static bool TryParse(ReadOnlySpan<byte> source, out byte value, out int bytesConsumed, char standardFormat = default)
{
switch (standardFormat)
{
case default(char):
case 'g':
case 'G':
case 'd':
case 'D':
return TryParseByteD(source, out value, out bytesConsumed);
case 'n':
case 'N':
return TryParseByteN(source, out value, out bytesConsumed);
case 'x':
case 'X':
return TryParseByteX(source, out value, out bytesConsumed);
default:
return ParserHelpers.TryParseThrowFormatException(out value, out bytesConsumed);
}
}
/// <summary>
/// Parses a UInt16 at the start of a Utf8 string.
/// </summary>
/// <param name="source">The Utf8 string to parse</param>
/// <param name="value">Receives the parsed value</param>
/// <param name="bytesConsumed">On a successful parse, receives the length in bytes of the substring that was parsed </param>
/// <param name="standardFormat">Expected format of the Utf8 string</param>
/// <returns>
/// true for success. "bytesConsumed" contains the length in bytes of the substring that was parsed.
/// false if the string was not syntactically valid or an overflow or underflow occurred. "bytesConsumed" is set to 0.
/// </returns>
/// <remarks>
/// Formats supported:
/// G/g (default)
/// D/d 32767
/// N/n 32,767
/// X/x 7fff
/// </remarks>
/// <exceptions>
/// <cref>System.FormatException</cref> if the format is not valid for this data type.
/// </exceptions>
[CLSCompliant(false)]
public static bool TryParse(ReadOnlySpan<byte> source, out ushort value, out int bytesConsumed, char standardFormat = default)
{
switch (standardFormat)
{
case default(char):
case 'g':
case 'G':
case 'd':
case 'D':
return TryParseUInt16D(source, out value, out bytesConsumed);
case 'n':
case 'N':
return TryParseUInt16N(source, out value, out bytesConsumed);
case 'x':
case 'X':
return TryParseUInt16X(source, out value, out bytesConsumed);
default:
return ParserHelpers.TryParseThrowFormatException(out value, out bytesConsumed);
}
}
/// <summary>
/// Parses a UInt32 at the start of a Utf8 string.
/// </summary>
/// <param name="source">The Utf8 string to parse</param>
/// <param name="value">Receives the parsed value</param>
/// <param name="bytesConsumed">On a successful parse, receives the length in bytes of the substring that was parsed </param>
/// <param name="standardFormat">Expected format of the Utf8 string</param>
/// <returns>
/// true for success. "bytesConsumed" contains the length in bytes of the substring that was parsed.
/// false if the string was not syntactically valid or an overflow or underflow occurred. "bytesConsumed" is set to 0.
/// </returns>
/// <remarks>
/// Formats supported:
/// G/g (default)
/// D/d 32767
/// N/n 32,767
/// X/x 7fff
/// </remarks>
/// <exceptions>
/// <cref>System.FormatException</cref> if the format is not valid for this data type.
/// </exceptions>
[CLSCompliant(false)]
public static bool TryParse(ReadOnlySpan<byte> source, out uint value, out int bytesConsumed, char standardFormat = default)
{
switch (standardFormat)
{
case default(char):
case 'g':
case 'G':
case 'd':
case 'D':
return TryParseUInt32D(source, out value, out bytesConsumed);
case 'n':
case 'N':
return TryParseUInt32N(source, out value, out bytesConsumed);
case 'x':
case 'X':
return TryParseUInt32X(source, out value, out bytesConsumed);
default:
return ParserHelpers.TryParseThrowFormatException(out value, out bytesConsumed);
}
}
/// <summary>
/// Parses a UInt64 at the start of a Utf8 string.
/// </summary>
/// <param name="source">The Utf8 string to parse</param>
/// <param name="value">Receives the parsed value</param>
/// <param name="bytesConsumed">On a successful parse, receives the length in bytes of the substring that was parsed </param>
/// <param name="standardFormat">Expected format of the Utf8 string</param>
/// <returns>
/// true for success. "bytesConsumed" contains the length in bytes of the substring that was parsed.
/// false if the string was not syntactically valid or an overflow or underflow occurred. "bytesConsumed" is set to 0.
/// </returns>
/// <remarks>
/// Formats supported:
/// G/g (default)
/// D/d 32767
/// N/n 32,767
/// X/x 7fff
/// </remarks>
/// <exceptions>
/// <cref>System.FormatException</cref> if the format is not valid for this data type.
/// </exceptions>
[CLSCompliant(false)]
public static bool TryParse(ReadOnlySpan<byte> source, out ulong value, out int bytesConsumed, char standardFormat = default)
{
switch (standardFormat)
{
case default(char):
case 'g':
case 'G':
case 'd':
case 'D':
return TryParseUInt64D(source, out value, out bytesConsumed);
case 'n':
case 'N':
return TryParseUInt64N(source, out value, out bytesConsumed);
case 'x':
case 'X':
return TryParseUInt64X(source, out value, out bytesConsumed);
default:
return ParserHelpers.TryParseThrowFormatException(out value, out bytesConsumed);
}
}
}
}
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