com.sun.squawk.os
Class CSystem

java.lang.Object
  com.sun.squawk.os.CSystem

public class CSystem
extends Object

Static class that represents the 'C' programming environment.

Constructor Summary

CSystem()

Method Summary

static int	copy(int addr, byte[] bytes, int lth) Copy data from a byte array into a malloc buffer.
static double	dcall(Parm x) Call a 'C' function.
static float	fcall(Parm x) Call a 'C' function.
static void	free(int address) Free a buffer allocated with malloc.
static int	getByte(int address) Get a byte in memory.
static int	getInt(int address) Get a word in memory.
static int	icall(Parm x) Call a 'C' function.
static long	lcall(Parm x) Call a 'C' function.
static int	lookup(String s) Lookup a C link symbol.
static int	malloc(int size) Malloc some memory.
static int	mallocBytes(byte[] bytes) Malloc some memory and copy a byte array into it.
static int	mallocString(String str) Malloc some memory and copy a string into it.
static Object	ocall(Parm x) Call a 'C' function.
static void	setByte(int address, int bite) Set a byte in memory.
static void	setInt(int address, int value) Set a word in memory.
static void	vcall(Parm x) Call a 'C' function.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

CSystem

public CSystem()

Method Detail

lookup

public static int lookup(String s)

Lookup a C link symbol.

Parameters:

s - the symbole

Returns:

the address

malloc

public static int malloc(int size)

Malloc some memory.

Parameters:

size - the size in bytes

Returns:

the address

mallocBytes

public static int mallocBytes(byte[] bytes)

Malloc some memory and copy a byte array into it.

Parameters:

bytes - the byte array

Returns:

the address

mallocString

public static int mallocString(String str)

Malloc some memory and copy a string into it.

Parameters:

str - the string

Returns:

the address

setByte

public static void setByte(int address,
                           int bite)

Set a byte in memory.

Parameters:

address - the address

bite - the value

getByte

public static int getByte(int address)

Get a byte in memory.

Parameters:

address - the address

Returns:

the value

setInt

public static void setInt(int address,
                          int value)

Set a word in memory.

Parameters:

address - the address

value - the value

getInt

public static int getInt(int address)

Get a word in memory.

Parameters:

address - the address

Returns:

the value

copy

public static int copy(int addr,
                       byte[] bytes,
                       int lth)

Copy data from a byte array into a malloc buffer.

Parameters:

addr - the address of the malloc buffer

bytes - the byte array to copy

lth - the length of the buffer to copy

Returns:

the address the data was copied to

free

public static void free(int address)

Free a buffer allocated with malloc.

Parameters:

address - the address of the buffer

vcall

public static void vcall(Parm x)

Call a 'C' function.

Parameters:

x - the parameter list

icall

public static int icall(Parm x)

Call a 'C' function.

Parameters:

x - the parameter list

Returns:

the result

lcall

public static long lcall(Parm x)

Call a 'C' function.

Parameters:

x - the parameter list

Returns:

the result

fcall

public static float fcall(Parm x)

Call a 'C' function.

Parameters:

x - the parameter list

Returns:

the result

dcall

public static double dcall(Parm x)

Call a 'C' function.

Parameters:

x - the parameter list

Returns:

the result

ocall

public static Object ocall(Parm x)

Call a 'C' function.

Parameters:

x - the parameter list

Returns:

the result