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Merge pull request #42 from quamotion/fixes/cache-encoding

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Use cached values for ASCII, UTF8 and UTF16 encoding
This commit is contained in:
Natalia Portillo
2018-06-22 19:07:53 +01:00
committed by GitHub
parent e8112c76b1 23c72a676a
commit 575a034516
2 changed files with 19 additions and 7 deletions
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8
plist-cil/BinaryPropertyListParser.cs
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@@ -44,6 +44,8 @@ namespace Claunia.PropertyList
/// @author Natalia Portillo /// @author Natalia Portillo
public class BinaryPropertyListParser public class BinaryPropertyListParser
{ {
private readonly static Encoding utf16BigEndian = Encoding.GetEncoding("UTF-16BE");
/// <summary> /// <summary>
/// Major version of the property list format /// Major version of the property list format
/// </summary> /// </summary>
@@ -290,7 +292,7 @@ namespace Claunia.PropertyList
{ {
//ASCII String, each character is 1 byte //ASCII String, each character is 1 byte
ReadLengthAndOffset(bytes, objInfo, offset, out int length, out int stroffset); ReadLengthAndOffset(bytes, objInfo, offset, out int length, out int stroffset);
return new NSString(bytes.Slice(offset + stroffset, length), "ASCII"); return new NSString(bytes.Slice(offset + stroffset, length), Encoding.ASCII);
} }
case 0x6: case 0x6:
{ {
@@ -300,7 +302,7 @@ namespace Claunia.PropertyList
//UTF-16 characters can have variable length, but the Core Foundation reference implementation //UTF-16 characters can have variable length, but the Core Foundation reference implementation
//assumes 2 byte characters, thus only covering the Basic Multilingual Plane //assumes 2 byte characters, thus only covering the Basic Multilingual Plane
length *= 2; length *= 2;
return new NSString(bytes.Slice(offset + stroffset, length), "UTF-16BE"); return new NSString(bytes.Slice(offset + stroffset, length), utf16BigEndian);
} }
case 0x7: case 0x7:
{ {
@@ -310,7 +312,7 @@ namespace Claunia.PropertyList
//UTF-8 characters can have variable length, so we need to calculate the byte length dynamically //UTF-8 characters can have variable length, so we need to calculate the byte length dynamically
//by reading the UTF-8 characters one by one //by reading the UTF-8 characters one by one
int length = CalculateUtf8StringLength(bytes, offset + strOffset, characters); int length = CalculateUtf8StringLength(bytes, offset + strOffset, characters);
return new NSString(bytes.Slice(offset + strOffset, length), "UTF-8"); return new NSString(bytes.Slice(offset + strOffset, length), Encoding.UTF8);
} }
case 0x8: case 0x8:
{ {

16
plist-cil/NSString.cs
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@@ -43,12 +43,22 @@ namespace Claunia.PropertyList
/// <param name="encoding">The encoding of the binary representation, the name of a supported charset.</param> /// <param name="encoding">The encoding of the binary representation, the name of a supported charset.</param>
/// <exception cref="ArgumentException">The encoding charset is invalid or not supported by the underlying platform.</exception> /// <exception cref="ArgumentException">The encoding charset is invalid or not supported by the underlying platform.</exception>
public NSString(ReadOnlySpan<byte> bytes, String encoding) public NSString(ReadOnlySpan<byte> bytes, String encoding)
: this(bytes, Encoding.GetEncoding(encoding))
{
}
/// <summary>
/// Creates a NSString from its binary representation.
/// </summary>
/// <param name="bytes">The binary representation.</param>
/// <param name="encoding">The encoding of the binary representation.</param>
/// <exception cref="ArgumentException">The encoding charset is invalid or not supported by the underlying platform.</exception>
public NSString(ReadOnlySpan<byte> bytes, Encoding encoding)
{ {
Encoding enc = Encoding.GetEncoding(encoding);
#if NATIVE_SPAN #if NATIVE_SPAN
content = enc.GetString(bytes); content = encoding.GetString(bytes);
#else #else
content = enc.GetString(bytes.ToArray()); content = encoding.GetString(bytes.ToArray());
#endif #endif
} }