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Commit 16bb081

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mythzmythz
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Move internal classes to DefaultMemory
1 parent d4cd74d commit 16bb081

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‎src/ServiceStack.Text/DefaultMemory.cs‎

Lines changed: 321 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -669,4 +669,325 @@ private static byte ParseHexByte(char c1, char c2)
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}
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}
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}
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enum ParseState
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{
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LeadingWhite,
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Sign,
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Number,
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DecimalPoint,
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FractionNumber,
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Exponent,
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ExponentSign,
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ExponentValue,
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TrailingWhite
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}
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internal static class SignedInteger<T> where T : struct, IComparable<T>, IEquatable<T>, IConvertible
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{
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private static readonly TypeCode typeCode;
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private static readonly long minValue;
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private static readonly long maxValue;
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static SignedInteger()
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{
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typeCode = Type.GetTypeCode(typeof(T));
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switch (typeCode)
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{
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case TypeCode.SByte:
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minValue = sbyte.MinValue;
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maxValue = sbyte.MaxValue;
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break;
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case TypeCode.Int16:
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minValue = short.MinValue;
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maxValue = short.MaxValue;
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break;
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case TypeCode.Int32:
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minValue = int.MinValue;
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maxValue = int.MaxValue;
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break;
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case TypeCode.Int64:
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minValue = long.MinValue;
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maxValue = long.MaxValue;
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break;
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default:
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throw new NotSupportedException($"{typeof(T).Name} is not a signed integer");
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}
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}
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internal static object ParseNullableObject(ReadOnlySpan<char> value)
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{
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if (value.IsNullOrEmpty())
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return null;
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return ParseObject(value);
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}
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internal static object ParseObject(ReadOnlySpan<char> value)
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{
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var result = ParseInt64(value);
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switch (typeCode)
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{
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case TypeCode.SByte:
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return (sbyte) result;
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case TypeCode.Int16:
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return (short) result;
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case TypeCode.Int32:
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return (int) result;
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default:
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return result;
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}
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}
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public static sbyte ParseSByte(ReadOnlySpan<char> value) => (sbyte) ParseInt64(value);
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public static short ParseInt16(ReadOnlySpan<char> value) => (short) ParseInt64(value);
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public static int ParseInt32(ReadOnlySpan<char> value) => (int) ParseInt64(value);
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public static long ParseInt64(ReadOnlySpan<char> value)
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{
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if (value.IsEmpty)
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throw new FormatException(MemoryProvider.BadFormat);
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long result = 0;
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int i = 0;
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int end = value.Length;
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var state = ParseState.LeadingWhite;
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bool negative = false;
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//skip leading whitespaces
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while (i < end && JsonUtils.IsWhiteSpace(value[i])) i++;
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if (i == end)
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throw new FormatException(MemoryProvider.BadFormat);
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//skip leading zeros
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while (i < end && value[i] == '0')
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{
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state = ParseState.Number;
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i++;
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}
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while (i < end)
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{
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var c = value[i++];
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switch (state)
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{
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case ParseState.LeadingWhite:
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if (c == '-')
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{
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negative = true;
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state = ParseState.Sign;
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}
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else if (c == '0')
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{
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state = ParseState.TrailingWhite;
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}
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else if (c > '0' && c <= '9')
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{
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result = -(c - '0');
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state = ParseState.Number;
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}
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else throw new FormatException(MemoryProvider.BadFormat);
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break;
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case ParseState.Sign:
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if (c == '0')
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{
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state = ParseState.TrailingWhite;
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}
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else if (c > '0' && c <= '9')
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{
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result = -(c - '0');
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state = ParseState.Number;
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}
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else throw new FormatException(MemoryProvider.BadFormat);
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break;
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case ParseState.Number:
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if (c >= '0' && c <= '9')
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{
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checked
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{
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result = 10 * result - (c - '0');
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}
815+
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if (result < minValue
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) //check only minvalue, because in absolute value it's greater than maxvalue
818+
throw DefaultMemory.CreateOverflowException(maxValue);
819+
}
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else if (JsonUtils.IsWhiteSpace(c))
821+
{
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state = ParseState.TrailingWhite;
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}
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else throw new FormatException(MemoryProvider.BadFormat);
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break;
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case ParseState.TrailingWhite:
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if (JsonUtils.IsWhiteSpace(c))
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{
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state = ParseState.TrailingWhite;
831+
}
832+
else throw new FormatException(MemoryProvider.BadFormat);
833+
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break;
835+
}
836+
}
837+
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if (state != ParseState.Number && state != ParseState.TrailingWhite)
839+
throw new FormatException(MemoryProvider.BadFormat);
840+
841+
if (negative)
842+
return result;
843+
844+
checked
845+
{
846+
result = -result;
847+
}
848+
849+
if (result > maxValue)
850+
throw DefaultMemory.CreateOverflowException(maxValue);
851+
852+
return result;
853+
}
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}
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internal static class UnsignedInteger<T> where T : struct, IComparable<T>, IEquatable<T>, IConvertible
857+
{
858+
private static readonly TypeCode typeCode;
859+
private static readonly ulong maxValue;
860+
861+
static UnsignedInteger()
862+
{
863+
typeCode = Type.GetTypeCode(typeof(T));
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865+
switch (typeCode)
866+
{
867+
case TypeCode.Byte:
868+
maxValue = byte.MaxValue;
869+
break;
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case TypeCode.UInt16:
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maxValue = ushort.MaxValue;
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break;
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case TypeCode.UInt32:
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maxValue = uint.MaxValue;
875+
break;
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case TypeCode.UInt64:
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maxValue = ulong.MaxValue;
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break;
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default:
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throw new NotSupportedException($"{typeof(T).Name} is not a signed integer");
881+
}
882+
}
883+
884+
internal static object ParseNullableObject(ReadOnlySpan<char> value)
885+
{
886+
if (value.IsNullOrEmpty())
887+
return null;
888+
889+
return ParseObject(value);
890+
}
891+
892+
internal static object ParseObject(ReadOnlySpan<char> value)
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{
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var result = ParseUInt64(value);
895+
switch (typeCode)
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{
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case TypeCode.Byte:
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return (byte) result;
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case TypeCode.UInt16:
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return (ushort) result;
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case TypeCode.UInt32:
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return (uint) result;
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default:
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return result;
905+
}
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}
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public static byte ParseByte(ReadOnlySpan<char> value) => (byte) ParseUInt64(value);
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public static ushort ParseUInt16(ReadOnlySpan<char> value) => (ushort) ParseUInt64(value);
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public static uint ParseUInt32(ReadOnlySpan<char> value) => (uint) ParseUInt64(value);
911+
912+
internal static ulong ParseUInt64(ReadOnlySpan<char> value)
913+
{
914+
if (value.IsEmpty)
915+
throw new FormatException(MemoryProvider.BadFormat);
916+
917+
ulong result = 0;
918+
int i = 0;
919+
int end = value.Length;
920+
var state = ParseState.LeadingWhite;
921+
922+
//skip leading whitespaces
923+
while (i < end && JsonUtils.IsWhiteSpace(value[i])) i++;
924+
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if (i == end)
926+
throw new FormatException(MemoryProvider.BadFormat);
927+
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//skip leading zeros
929+
while (i < end && value[i] == '0')
930+
{
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state = ParseState.Number;
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i++;
933+
}
934+
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while (i < end)
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{
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var c = value[i++];
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switch (state)
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{
941+
case ParseState.LeadingWhite:
942+
if (JsonUtils.IsWhiteSpace(c))
943+
break;
944+
if (c == '0')
945+
{
946+
state = ParseState.TrailingWhite;
947+
}
948+
else if (c > '0' && c <= '9')
949+
{
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result = (ulong) (c - '0');
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state = ParseState.Number;
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}
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else throw new FormatException(MemoryProvider.BadFormat);
954+
955+
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break;
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case ParseState.Number:
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if (c >= '0' && c <= '9')
959+
{
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checked
961+
{
962+
result = 10 * result + (ulong) (c - '0');
963+
}
964+
965+
if (result > maxValue
966+
) //check only minvalue, because in absolute value it's greater than maxvalue
967+
throw DefaultMemory.CreateOverflowException(maxValue);
968+
}
969+
else if (JsonUtils.IsWhiteSpace(c))
970+
{
971+
state = ParseState.TrailingWhite;
972+
}
973+
else throw new FormatException(MemoryProvider.BadFormat);
974+
975+
break;
976+
case ParseState.TrailingWhite:
977+
if (JsonUtils.IsWhiteSpace(c))
978+
{
979+
state = ParseState.TrailingWhite;
980+
}
981+
else throw new FormatException(MemoryProvider.BadFormat);
982+
983+
break;
984+
}
985+
}
986+
987+
if (state != ParseState.Number && state != ParseState.TrailingWhite)
988+
throw new FormatException(MemoryProvider.BadFormat);
989+
990+
return result;
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}
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}
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}

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