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8317837: Leftover FFM implementation-only changes

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Co-authored-by: Maurizio Cimadamore <mcimadamore@openjdk.org>
Co-authored-by: Per Minborg <pminborg@openjdk.org>
Reviewed-by: mcimadamore
This commit is contained in:
Jorn Vernee 2023-10-13 19:05:47 +00:00
parent 605c976729
commit b12c471a99
22 changed files with 1432 additions and 115 deletions
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17
src/java.base/share/classes/java/lang/String.java
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@ -28,6 +28,8 @@ package java.lang;
import java.io.ObjectStreamField;
import java.io.UnsupportedEncodingException;
import java.lang.annotation.Native;
import java.lang.foreign.MemorySegment;
import java.lang.foreign.ValueLayout;
import java.lang.invoke.MethodHandles;
import java.lang.constant.Constable;
import java.lang.constant.ConstantDesc;
@ -1836,6 +1838,21 @@ public final class String
return encode(Charset.defaultCharset(), coder(), value);
}
boolean bytesCompatible(Charset charset) {
if (isLatin1()) {
if (charset == ISO_8859_1.INSTANCE) {
return true; // ok, same encoding
} else if (charset == UTF_8.INSTANCE || charset == US_ASCII.INSTANCE) {
return !StringCoding.hasNegatives(value, 0, value.length); // ok, if ASCII-compatible
}
}
return false;
}
void copyToSegmentRaw(MemorySegment segment, long offset) {
MemorySegment.copy(value, 0, segment, ValueLayout.JAVA_BYTE, offset, value.length);
}
/**
* Compares this string to the specified object. The result is {@code
* true} if and only if the argument is not {@code null} and is a {@code