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RandomAccessFile.java (seek): Let seek go past end of file.

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* java/io/RandomAccessFile.java (seek): Let seek go past end of
	file.
	(skipBytes): Don't fail if seeking past end of file.
	* java/io/FileInputStream.java (skip): Don't fail if seeking past
	end of file.
	* java/io/natFileDescriptorWin32.cc (seek): Handle `eof_trunc'
	argument.
	* java/io/natFileDescriptorEcos.cc (seek): Handle `eof_trunc'
	argument.
	* java/io/natFileDescriptorPosix.cc (seek): Handle `eof_trunc'
	argument.
	* java/io/FileDescriptor.java (seek): Added `eof_trunc' argument.

From-SVN: r44586
This commit is contained in:
Tom Tromey 2001-08-02 23:46:39 +00:00 committed by Tom Tromey
parent ead4cf347a
commit 8d6a437584
7 changed files with 43 additions and 23 deletions
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15
libjava/ChangeLog
View File

@ -1,3 +1,18 @@
2001-08-02 Tom Tromey <tromey@redhat.com>
* java/io/RandomAccessFile.java (seek): Let seek go past end of
file.
(skipBytes): Don't fail if seeking past end of file.
* java/io/FileInputStream.java (skip): Don't fail if seeking past
end of file.
* java/io/natFileDescriptorWin32.cc (seek): Handle `eof_trunc'
argument.
* java/io/natFileDescriptorEcos.cc (seek): Handle `eof_trunc'
argument.
* java/io/natFileDescriptorPosix.cc (seek): Handle `eof_trunc'
argument.
* java/io/FileDescriptor.java (seek): Added `eof_trunc' argument.
2001-08-02 Martin Kahlert <martin.kahlert@infineon.com>
* jni.cc (JNI_CreateJavaVM): Call _Jv_JNI_Init in order

8
libjava/java/io/FileDescriptor.java
View File

@ -1,6 +1,6 @@
// FileDescriptor.java - Open file or device
/* Copyright (C) 1998, 1999, 2000 Free Software Foundation
/* Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation
This file is part of libgcj.
@ -54,7 +54,11 @@ public final class FileDescriptor
native void write (byte[] b, int offset, int len)
throws IOException, NullPointerException, IndexOutOfBoundsException;
native void close () throws IOException;
native int seek (long pos, int whence) throws IOException;
// EOF_TRUNC is true if a request to seek past the end of file
// should actually stop at the end of file. If false, then a seek
// past the end is ok (and if a subsequent write occurs the file
// will grow).
native int seek (long pos, int whence, boolean eof_trunc) throws IOException;
native long length () throws IOException;
native long getFilePointer () throws IOException;
native int read () throws IOException;

4
libjava/java/io/FileInputStream.java
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@ -1,4 +1,4 @@
/* Copyright (C) 1998, 1999 Free Software Foundation
/* Copyright (C) 1998, 1999, 2001 Free Software Foundation
This file is part of libgcj.
@ -88,6 +88,6 @@ public class FileInputStream extends InputStream
public long skip(long n) throws IOException
{
return fd.seek(n, FileDescriptor.CUR);
return n <= 0 ? 0 : fd.seek(n, FileDescriptor.CUR, true);
}
}

6
libjava/java/io/RandomAccessFile.java
View File

@ -1,6 +1,6 @@
// RandomAccessFile.java
/* Copyright (C) 1998, 1999 Free Software Foundation
/* Copyright (C) 1998, 1999, 2001 Free Software Foundation
This file is part of libgcj.
@ -161,12 +161,12 @@ public class RandomAccessFile implements DataOutput, DataInput
public void seek (long pos) throws IOException
{
fd.seek(pos, FileDescriptor.SET);
fd.seek(pos, FileDescriptor.SET, false);
}
public int skipBytes (int count) throws IOException
{
return fd.seek(count, FileDescriptor.CUR);
return count <= 0 ? 0 : fd.seek(count, FileDescriptor.CUR, true);
}
public void write (int oneByte) throws IOException

11
libjava/java/io/natFileDescriptorEcos.cc
View File

@ -1,6 +1,6 @@
// natFileDescriptor.cc - Native part of FileDescriptor class.
/* Copyright (C) 1998, 1999 Free Software Foundation
/* Copyright (C) 1998, 1999, 2001 Free Software Foundation
This file is part of libgcj.
@ -88,16 +88,9 @@ java::io::FileDescriptor::close (void)
}
jint
java::io::FileDescriptor::seek (jlong pos, jint whence)
java::io::FileDescriptor::seek (jlong pos, jint whence, jboolean)
{
JvAssert (whence == SET || whence == CUR);
jlong len = length ();
jlong here = getFilePointer ();
if ((whence == SET && pos > len) || (whence == CUR && here + pos > len))
throw new EOFException;
return 0;
}

10
libjava/java/io/natFileDescriptorPosix.cc
View File

@ -177,15 +177,19 @@ java::io::FileDescriptor::close (void)
}
jint
java::io::FileDescriptor::seek (jlong pos, jint whence)
java::io::FileDescriptor::seek (jlong pos, jint whence, jboolean eof_trunc)
{
JvAssert (whence == SET || whence == CUR);
jlong len = length ();
jlong here = getFilePointer ();
if ((whence == SET && pos > len) || (whence == CUR && here + pos > len))
throw new EOFException;
if (eof_trunc
&& ((whence == SET && pos > len) || (whence == CUR && here + pos > len)))
{
whence = SET;
pos = len;
}
off_t r = ::lseek (fd, (off_t) pos, whence == SET ? SEEK_SET : SEEK_CUR);
if (r == -1)

12
libjava/java/io/natFileDescriptorWin32.cc
View File

@ -1,6 +1,6 @@
// natFileDescriptorWin32.cc - Native part of FileDescriptor class.
/* Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
/* Copyright (C) 1998, 1999, 2000, 2001 Red Hat, Inc.
This file is part of libgcj.
@ -171,15 +171,19 @@ java::io::FileDescriptor::close (void)
}
jint
java::io::FileDescriptor::seek (jlong pos, jint whence)
java::io::FileDescriptor::seek (jlong pos, jint whence, jboolean eof_trunc)
{
JvAssert (whence == SET || whence == CUR);
jlong len = length();
jlong here = getFilePointer();
if ((whence == SET && pos > len) || (whence == CUR && here + pos > len))
throw new EOFException;
if (eof_trunc
&& ((whence == SET && pos > len) || (whence == CUR && here + pos > len)))
{
whence = SET;
pos = len;
}
LONG high = pos >> 32;
DWORD low = SetFilePointer ((HANDLE)fd, (DWORD)(0xffffffff & pos), &high, whence == SET ? FILE_BEGIN : FILE_CURRENT);