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Optimize parseCentralDirectory

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Avoid creating redundant IntRange
This commit is contained in:
Denis.Zharkov
2021-08-03 17:58:38 +03:00
committed by teamcityserver
parent f81f28569f
commit 6cd3d84e74
1 changed files with 4 additions and 2 deletions
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compiler/cli/src/org/jetbrains/kotlin/cli/jvm/compiler/jarfs/ZipImplementation.kt
+4 -2
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@@ -62,9 +62,11 @@ fun MappedByteBuffer.contentsToByteArray(
fun MappedByteBuffer.parseCentralDirectory(): List<ZipEntryDescription> { fun MappedByteBuffer.parseCentralDirectory(): List<ZipEntryDescription> {
order(ByteOrder.LITTLE_ENDIAN) order(ByteOrder.LITTLE_ENDIAN)
val endOfCentralDirectoryOffset = (capacity() - END_OF_CENTRAL_DIR_SIZE downTo 0).first { offset -> var endOfCentralDirectoryOffset = capacity() - END_OF_CENTRAL_DIR_SIZE
while (endOfCentralDirectoryOffset >= 0) {
// header of "End of central directory" // header of "End of central directory"
getInt(offset) == 0x06054b50 if (getInt(endOfCentralDirectoryOffset) == 0x06054b50) break
endOfCentralDirectoryOffset--
} }
val entriesNumber = getUnsignedShort(endOfCentralDirectoryOffset + 10) val entriesNumber = getUnsignedShort(endOfCentralDirectoryOffset + 10)