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Java 1996 August
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kaffe-0.2
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java.io
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java.io.RandomAccessFile.c
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1996-02-11
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/*
* java.io.RandomAccessFile.c
*
* Copyright (c) 1996 Systems Architecture Research Centre,
* City University, London, UK.
*
* See the file "license.terms" for information on usage and redistribution
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
* Written by Tim Wilkinson <tim@sarc.city.ac.uk>, February 1996.
*/
#include <stdio.h>
#include <assert.h>
#include "files.h"
#include "java.io.RandomAccessFile.h"
#include "java.io.FileDescriptor.h"
/*
* Open a file for random access.
*/
void
java_io_RandomAccessFile_open(struct Hjava_io_RandomAccessFile* this, struct Hjava_lang_String* name, long /* bool */ rw)
{
int fd;
char str[MAXPATHLEN];
javaString2CString(name, str, sizeof(str));
fd = open(str, (rw == 0 ? O_RDONLY : O_RDWR));
unhand(unhand(this)->fd)->fd = fd;
if (fd < 0) {
SignalError(0, "java.io.IOException", SYS_ERROR);
}
}
/*
* Return length of file.
*/
long long
java_io_RandomAccessFile_length(struct Hjava_io_RandomAccessFile* this)
{
struct stat buf;
int r;
r = fstat(unhand(unhand(this)->fd)->fd, &buf);
if (r < 0) {
SignalError(0, "java.io.IOException", SYS_ERROR);
}
return (buf.st_size);
}
/*
* Seek into file.
*/
void
java_io_RandomAccessFile_seek(struct Hjava_io_RandomAccessFile* this, long long pos)
{
int r;
r = lseek(unhand(unhand(this)->fd)->fd, pos, SEEK_SET);
if (r < 0) {
SignalError(0, "java.io.IOException", SYS_ERROR);
}
}
/*
* Read in bytes from file.
*/
long
java_io_RandomAccessFile_readBytes(struct Hjava_io_RandomAccessFile* this, HArray* bytes, long off, long len)
{
long ret;
ret = read(unhand(unhand(this)->fd)->fd, &bytes->data[off], len);
if (ret < 0) {
SignalError(0, "java.io.IOException", SYS_ERROR);
}
return (ret);
}
/*
* Read a byte from file.
*/
long
java_io_RandomAccessFile_read(struct Hjava_io_RandomAccessFile* this)
{
long ret;
unsigned char byte;
ret = read(unhand(unhand(this)->fd)->fd, &byte, 1);
if (ret < 0) {
SignalError(0, "java.io.IOException", SYS_ERROR);
}
return (byte);
}
/*
* Write a byte to file.
*/
void
java_io_RandomAccessFile_write(struct Hjava_io_RandomAccessFile* this, long data)
{
long ret;
unsigned char byte;
byte = data;
ret = write(unhand(unhand(this)->fd)->fd, &byte, 1);
if (ret < 0) {
SignalError(0, "java.io.IOException", SYS_ERROR);
}
}
/*
* Write a number of bytes to file.
*/
void
java_io_RandomAccessFile_writeBytes(struct Hjava_io_RandomAccessFile* this, HArray* bytes, long off, long len)
{
long ret;
ret = write(unhand(unhand(this)->fd)->fd, &bytes->data[off], len);
if (ret < 0) {
SignalError(0, "java.io.IOException", SYS_ERROR);
}
}
/*
* Get current file position.
*/
long long
java_io_RandomAccessFile_getFilePointer(struct Hjava_io_RandomAccessFile* this)
{
long long r;
r = lseek(unhand(unhand(this)->fd)->fd, 0, SEEK_CUR);
if (r < 0) {
SignalError(0, "java.io.IOException", SYS_ERROR);
}
return (r);
}
/*
* Close file.
*/
void
java_io_RandomAccessFile_close(struct Hjava_io_RandomAccessFile* this)
{
int r;
r = close(unhand(unhand(this)->fd)->fd);
if (r < 0) {
SignalError(0, "java.io.IOException", SYS_ERROR);
}
}