public Boolean EndsWith(String value, StringComparison comparisonType)
{
if ((Object)value == null)
{
throw new ArgumentNullException(nameof(value));
}
if (comparisonType < StringComparison.CurrentCulture || comparisonType > StringComparison.OrdinalIgnoreCase)
{
throw new ArgumentException(Environment.GetResourceString("NotSupported_StringComparison"), nameof(comparisonType));
}
Contract.EndContractBlock();
if ((Object)this == (Object)value)
{
return(true);
}
if (value.Length == 0)
{
return(true);
}
switch (comparisonType)
{
case StringComparison.CurrentCulture:
return(CultureInfo.CurrentCulture.CompareInfo.IsSuffix(this, value, CompareOptions.None));
case StringComparison.CurrentCultureIgnoreCase:
return(CultureInfo.CurrentCulture.CompareInfo.IsSuffix(this, value, CompareOptions.IgnoreCase));
case StringComparison.InvariantCulture:
return(CultureInfo.InvariantCulture.CompareInfo.IsSuffix(this, value, CompareOptions.None));
case StringComparison.InvariantCultureIgnoreCase:
return(CultureInfo.InvariantCulture.CompareInfo.IsSuffix(this, value, CompareOptions.IgnoreCase));
case StringComparison.Ordinal:
return(this.Length < value.Length ? false : (CompareOrdinalHelper(this, this.Length - value.Length, value.Length, value, 0, value.Length) == 0));
case StringComparison.OrdinalIgnoreCase:
#if FEATURE_COREFX_GLOBALIZATION
return(this.Length < value.Length ? false : (CompareInfo.CompareOrdinalIgnoreCase(this, this.Length - value.Length, value.Length, value, 0, value.Length) == 0));
#else
return(this.Length < value.Length ? false : (TextInfo.CompareOrdinalIgnoreCaseEx(this, this.Length - value.Length, value, 0, value.Length, value.Length) == 0));
#endif
default:
throw new ArgumentException(Environment.GetResourceString("NotSupported_StringComparison"), nameof(comparisonType));
}
}
public static int Compare(String strA, int indexA, String strB, int indexB, int length, StringComparison comparisonType)
{
if (comparisonType < StringComparison.CurrentCulture || comparisonType > StringComparison.OrdinalIgnoreCase)
{
throw new ArgumentException(Environment.GetResourceString("NotSupported_StringComparison"), nameof(comparisonType));
}
Contract.EndContractBlock();
if (strA == null || strB == null)
{
if (object.ReferenceEquals(strA, strB))
{
// They're both null
return(0);
}
return(strA == null ? -1 : 1);
}
if (length < 0)
{
throw new ArgumentOutOfRangeException(nameof(length), Environment.GetResourceString("ArgumentOutOfRange_NegativeLength"));
}
if (indexA < 0 || indexB < 0)
{
string paramName = indexA < 0 ? nameof(indexA) : nameof(indexB);
throw new ArgumentOutOfRangeException(paramName, Environment.GetResourceString("ArgumentOutOfRange_Index"));
}
if (strA.Length - indexA < 0 || strB.Length - indexB < 0)
{
string paramName = strA.Length - indexA < 0 ? nameof(indexA) : nameof(indexB);
throw new ArgumentOutOfRangeException(paramName, Environment.GetResourceString("ArgumentOutOfRange_Index"));
}
if (length == 0 || (object.ReferenceEquals(strA, strB) && indexA == indexB))
{
return(0);
}
int lengthA = Math.Min(length, strA.Length - indexA);
int lengthB = Math.Min(length, strB.Length - indexB);
switch (comparisonType)
{
case StringComparison.CurrentCulture:
return(CultureInfo.CurrentCulture.CompareInfo.Compare(strA, indexA, lengthA, strB, indexB, lengthB, CompareOptions.None));
case StringComparison.CurrentCultureIgnoreCase:
return(CultureInfo.CurrentCulture.CompareInfo.Compare(strA, indexA, lengthA, strB, indexB, lengthB, CompareOptions.IgnoreCase));
case StringComparison.InvariantCulture:
return(CultureInfo.InvariantCulture.CompareInfo.Compare(strA, indexA, lengthA, strB, indexB, lengthB, CompareOptions.None));
case StringComparison.InvariantCultureIgnoreCase:
return(CultureInfo.InvariantCulture.CompareInfo.Compare(strA, indexA, lengthA, strB, indexB, lengthB, CompareOptions.IgnoreCase));
case StringComparison.Ordinal:
return(CompareOrdinalHelper(strA, indexA, lengthA, strB, indexB, lengthB));
case StringComparison.OrdinalIgnoreCase:
#if FEATURE_COREFX_GLOBALIZATION
return(CompareInfo.CompareOrdinalIgnoreCase(strA, indexA, lengthA, strB, indexB, lengthB));
#else
return(TextInfo.CompareOrdinalIgnoreCaseEx(strA, indexA, strB, indexB, lengthA, lengthB));
#endif
default:
throw new ArgumentException(Environment.GetResourceString("NotSupported_StringComparison"));
}
}
public Boolean StartsWith(String value, StringComparison comparisonType)
{
if ((Object)value == null)
{
throw new ArgumentNullException(nameof(value));
}
if (comparisonType < StringComparison.CurrentCulture || comparisonType > StringComparison.OrdinalIgnoreCase)
{
throw new ArgumentException(Environment.GetResourceString("NotSupported_StringComparison"), nameof(comparisonType));
}
Contract.EndContractBlock();
if ((Object)this == (Object)value)
{
return(true);
}
if (value.Length == 0)
{
return(true);
}
switch (comparisonType)
{
case StringComparison.CurrentCulture:
return(CultureInfo.CurrentCulture.CompareInfo.IsPrefix(this, value, CompareOptions.None));
case StringComparison.CurrentCultureIgnoreCase:
return(CultureInfo.CurrentCulture.CompareInfo.IsPrefix(this, value, CompareOptions.IgnoreCase));
case StringComparison.InvariantCulture:
return(CultureInfo.InvariantCulture.CompareInfo.IsPrefix(this, value, CompareOptions.None));
case StringComparison.InvariantCultureIgnoreCase:
return(CultureInfo.InvariantCulture.CompareInfo.IsPrefix(this, value, CompareOptions.IgnoreCase));
case StringComparison.Ordinal:
if (this.Length < value.Length || m_firstChar != value.m_firstChar)
{
return(false);
}
return((value.Length == 1) ?
true : // First char is the same and thats all there is to compare
StartsWithOrdinalHelper(this, value));
case StringComparison.OrdinalIgnoreCase:
if (this.Length < value.Length)
{
return(false);
}
#if FEATURE_COREFX_GLOBALIZATION
return(CompareInfo.CompareOrdinalIgnoreCase(this, 0, value.Length, value, 0, value.Length) == 0);
#else
return(TextInfo.CompareOrdinalIgnoreCaseEx(this, 0, value, 0, value.Length, value.Length) == 0);
#endif
default:
throw new ArgumentException(Environment.GetResourceString("NotSupported_StringComparison"), nameof(comparisonType));
}
}