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// natFileDescriptor.cc - Native part of FileDescriptor class.
/* Copyright (C) 1998, 1999 Cygnus Solutions
This file is part of libgcj.
This software is copyrighted work licensed under the terms of the
Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
details. */
#include <config.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/param.h>
#include <gcj/cni.h>
#include <jvm.h>
#include <java/io/FileDescriptor.h>
#include <java/io/SyncFailedException.h>
#include <java/io/IOException.h>
#include <java/io/EOFException.h>
#include <java/lang/ArrayIndexOutOfBoundsException.h>
#include <java/lang/NullPointerException.h>
#include <java/lang/String.h>
#include <java/io/FileNotFoundException.h>
extern "C" void diag_write_char (char c);
static void
diag_write (char *data, int len)
{
while (len > 0)
{
diag_write_char (*data++);
len--;
}
}
#define NO_FSYNC_MESSAGE "sync unsupported"
jboolean
java::io::FileDescriptor::valid (void)
{
return true;
}
void
java::io::FileDescriptor::sync (void)
{
// Some files don't support fsync. We don't bother reporting these
// as errors.
#ifdef HAVE_FSYNC
#else
JvThrow (new SyncFailedException (JvNewStringLatin1 (NO_FSYNC_MESSAGE)));
#endif
}
jint
java::io::FileDescriptor::open (jstring path, jint jflags)
{
return fd;
}
void
java::io::FileDescriptor::write (jint b)
{
char d = (char) b;
::diag_write (&d, 1);
}
void
java::io::FileDescriptor::write (jbyteArray b, jint offset, jint len)
{
if (! b)
JvThrow (new java::lang::NullPointerException);
if (offset < 0 || len < 0 || offset + len > JvGetArrayLength (b))
JvThrow (new java::lang::ArrayIndexOutOfBoundsException);
char *bytes = (char *)elements (b) + offset;
::diag_write (bytes, len);
}
void
java::io::FileDescriptor::close (void)
{
}
jint
java::io::FileDescriptor::seek (jlong pos, jint whence)
{
JvAssert (whence == SET || whence == CUR);
jlong len = length ();
jlong here = getFilePointer ();
if ((whence == SET && pos > len) || (whence == CUR && here + pos > len))
JvThrow (new EOFException);
return 0;
}
jlong
java::io::FileDescriptor::length (void)
{
return 0;
}
jlong
java::io::FileDescriptor::getFilePointer (void)
{
return 0;
}
jint
java::io::FileDescriptor::read (void)
{
return 0;
}
jint
java::io::FileDescriptor::read (jbyteArray buffer, jint offset, jint count)
{
return 0;
}
jint
java::io::FileDescriptor::available (void)
{
return 0;
}
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