Forth - Forth virtual machine

ANS forth virtual machine. More...

Collaboration diagram for Forth - Forth virtual machine:

Classes
class	ForthIo
	Abstract interfrace class for forth character i/o. More...
class	Forth
	Public interface to the forth virtual machine. More...
Modules
	Internal - Internal implementation of the forth virtual machine
	Test - Test code for forth virtual machine
Defines
#define	BITS_PER_CHAR   8
#define	CHARS_PER_CELL   4
Typedefs
typedef int32_t	CELL
typedef uint32_t	UCELL
typedef uint8_t	CHAR

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Detailed Description

ANS forth virtual machine.

This is a 'token threaded' implementation which contains the ANS Core words plus a few extra words from other word sets. It doesn't make use of any C library functions, and so should compile to stand-alone code suitable for embedding in other programs.

Version:

2005-12-27

• Fixed various bugs in Forth virtual machine which manifested when sizeof(CELL) was greater than sizeof(CELL*).

2006-05-20

• Changed code to use standard typedefs, e.g. replaced uint8 with uint8_t, and made use of size_t.

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Define Documentation

#define BITS_PER_CHAR   8

Number of bits in a CHAR

Definition at line 77 of file forth.h.

#define CHARS_PER_CELL   4

Number of CHARs in a CELL

Definition at line 82 of file forth.h.

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Typedef Documentation

typedef int32_t CELL

A type representing a forth cell type. If this typedef is changed then CHARS_PER_CELL must be updated.

Definition at line 58 of file forth.h.

typedef uint32_t UCELL

A type representing a forth unsigned cell type. This mus have the same size as CELL.

Definition at line 66 of file forth.h.

typedef uint8_t CHAR

A type representing a forth char type. If this typedef is changed then BITS_PER_CHAR and CHARS_PER_CELL must be updated.

Definition at line 72 of file forth.h.