home *** CD-ROM | disk | FTP | other *** search
- /*
- * 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 "config.h"
- #include <stdio.h>
- #include <assert.h>
- #if defined(HAVE_UNISTD_H)
- #include <unistd.h>
- #endif
- #include "defs.h"
- #include "files.h"
- #include "java.io.stubs/RandomAccessFile.h"
- #include "java.io.stubs/FileDescriptor.h"
- #include "kthread.h"
-
- /*
- * Open a file for random access.
- */
- void
- java_io_RandomAccessFile_open(struct Hjava_io_RandomAccessFile* this, struct Hjava_lang_String* name, jint /* bool */ rw)
- {
- int fd;
- char str[MAXPATHLEN];
-
- javaString2CString(name, str, sizeof(str));
-
- fd = threadedOpen(str, (rw == 0 ? O_RDONLY : O_RDWR|O_CREAT)|O_BINARY, 0666);
- unhand(unhand(this)->fd)->fd = fd;
- if (fd < 0) {
- SignalError(0, "java.io.IOException", SYS_ERROR);
- }
- }
-
- /*
- * Return length of file.
- */
- jlong
- 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 (off_t2jlong(buf.st_size));
- }
-
- /*
- * Seek into file.
- */
- void
- java_io_RandomAccessFile_seek(struct Hjava_io_RandomAccessFile* this, jlong pos)
- {
- int r;
-
- r = lseek(unhand(unhand(this)->fd)->fd, jlong2off_t(pos), SEEK_SET);
- if (r < 0) {
- SignalError(0, "java.io.IOException", SYS_ERROR);
- }
- }
-
- /*
- * Read in bytes from file.
- */
- jint
- java_io_RandomAccessFile_readBytes(struct Hjava_io_RandomAccessFile* this, HArrayOfByte* bytes, jint off, jint len)
- {
- jint ret;
-
- ret = threadedRead(unhand(unhand(this)->fd)->fd, &unhand(bytes)->body[off], len);
- if (ret < 0) {
- SignalError(0, "java.io.IOException", SYS_ERROR);
- }
- return (ret > 0 ? ret : -1);
- }
-
- /*
- * Read a byte from file.
- */
- jint
- java_io_RandomAccessFile_read(struct Hjava_io_RandomAccessFile* this)
- {
- jint ret;
- unsigned char byte;
-
- ret = threadedRead(unhand(unhand(this)->fd)->fd, &byte, 1);
- if (ret < 0) {
- SignalError(0, "java.io.IOException", SYS_ERROR);
- }
-
- return (ret > 0 ? byte : -1);
- }
-
- /*
- * Write a byte to file.
- */
- void
- java_io_RandomAccessFile_write(struct Hjava_io_RandomAccessFile* this, jint data)
- {
- jint ret;
- unsigned char byte;
-
- byte = data;
-
- ret = threadedWrite(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, HArrayOfByte* bytes, jint off, jint len)
- {
- jint ret;
-
- ret = threadedWrite(unhand(unhand(this)->fd)->fd, &unhand(bytes)->body[off], len);
- if (ret < 0) {
- SignalError(0, "java.io.IOException", SYS_ERROR);
- }
- }
-
- /*
- * Get current file position.
- */
- jlong
- java_io_RandomAccessFile_getFilePointer(struct Hjava_io_RandomAccessFile* this)
- {
- off_t r;
-
- r = lseek(unhand(unhand(this)->fd)->fd, 0, SEEK_CUR);
- if (r < 0) {
- SignalError(0, "java.io.IOException", SYS_ERROR);
- }
- return (off_t2jlong(r));
- }
-
- /*
- * Close file.
- */
- void
- java_io_RandomAccessFile_close(struct Hjava_io_RandomAccessFile* this)
- {
- int r;
-
- if (unhand(unhand(this)->fd)->fd >= 0) {
- r = close(unhand(unhand(this)->fd)->fd);
- unhand(unhand(this)->fd)->fd = -1;
- if (r < 0) {
- SignalError(0, "java.io.IOException", SYS_ERROR);
- }
- }
- }
-