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8264777: Overload optimized FileInputStream::readAllBytes

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Reviewed-by: dfuchs, alanb
This commit is contained in:
Brian Burkhalter 2021-05-17 19:58:41 +00:00
parent 3b11d811a2
commit da4dfde71a
4 changed files with 243 additions and 6 deletions
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35
src/java.base/share/native/libjava/FileInputStream.c
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@ -1,5 +1,5 @@
/*
* Copyright (c) 1997, 2020, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 1997, 2021, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@ -72,6 +72,39 @@ Java_java_io_FileInputStream_readBytes(JNIEnv *env, jobject this,
return readBytes(env, this, bytes, off, len, fis_fd);
}
JNIEXPORT jlong JNICALL
Java_java_io_FileInputStream_length0(JNIEnv *env, jobject this) {
FD fd;
jlong length = jlong_zero;
fd = getFD(env, this, fis_fd);
if (fd == -1) {
JNU_ThrowIOException(env, "Stream Closed");
return -1;
}
if ((length = IO_GetLength(fd)) == -1) {
JNU_ThrowIOExceptionWithLastError(env, "GetLength failed");
}
return length;
}
JNIEXPORT jlong JNICALL
Java_java_io_FileInputStream_position0(JNIEnv *env, jobject this) {
FD fd;
jlong ret;
fd = getFD(env, this, fis_fd);
if (fd == -1) {
JNU_ThrowIOException(env, "Stream Closed");
return -1;
}
if ((ret = IO_Lseek(fd, 0L, SEEK_CUR)) == -1) {
JNU_ThrowIOExceptionWithLastError(env, "Seek failed");
}
return ret;
}
JNIEXPORT jlong JNICALL
Java_java_io_FileInputStream_skip0(JNIEnv *env, jobject this, jlong toSkip) {
jlong cur = jlong_zero;