qse/ase/stx/stx.h

126 lines
2.8 KiB
C

/*
* $Id: stx.h,v 1.28 2005-06-30 12:07:02 bacon Exp $
*/
#ifndef _XP_STX_STX_H_
#define _XP_STX_STX_H_
#include <xp/types.h>
#include <xp/macros.h>
typedef struct xp_stx_objhdr_t xp_stx_objhdr_t;
typedef struct xp_stx_object_t xp_stx_object_t;
typedef struct xp_stx_word_object_t xp_stx_word_object_t;
typedef struct xp_stx_byte_object_t xp_stx_byte_object_t;
typedef struct xp_stx_char_object_t xp_stx_char_object_t;
typedef struct xp_stx_memory_t xp_stx_memory_t;
typedef struct xp_stx_t xp_stx_t;
/* common object structure */
struct xp_stx_objhdr_t
{
/* access - type: 2; size: rest;
* type - word indexed: 00 byte indexed: 01 char indexed: 10
*/
xp_word_t access;
xp_word_t class;
};
struct xp_stx_object_t
{
xp_stx_objhdr_t header;
};
struct xp_stx_word_object_t
{
xp_stx_objhdr_t header;
xp_word_t data[1];
};
struct xp_stx_byte_object_t
{
xp_stx_objhdr_t header;
xp_byte_t data[1];
};
struct xp_stx_char_object_t
{
xp_stx_objhdr_t header;
xp_char_t data[1];
};
struct xp_stx_memory_t
{
xp_word_t capacity;
xp_stx_object_t** slots;
xp_stx_object_t** free;
xp_bool_t __malloced;
};
struct xp_stx_t
{
xp_stx_memory_t memory;
xp_word_t nil;
xp_word_t true;
xp_word_t false;
xp_word_t symbol_table;
xp_word_t smalltalk;
xp_word_t class_symlink;
xp_word_t class_symbol;
xp_word_t class_metaclass;
xp_word_t class_pairlink;
xp_word_t class_object;
xp_word_t class_class;
xp_word_t class_array;
xp_word_t class_string;
xp_bool_t __malloced;
xp_bool_t __wantabort; /* TODO: make it a function pointer */
};
#define XP_STX_NIL 0
#define XP_STX_TRUE 1
#define XP_STX_FALSE 2
#define XP_STX_OBJECT(stx,idx) (((stx)->memory).slots[idx])
#define XP_STX_CLASS(stx,idx) (XP_STX_OBJECT(stx,(idx))->header.class)
#define XP_STX_ACCESS(stx,idx) (XP_STX_OBJECT(stx,(idx))->header.access)
#define XP_STX_DATA(stx,idx) ((void*)(XP_STX_OBJECT(stx,idx) + 1))
#define XP_STX_TYPE(stx,idx) (XP_STX_ACCESS(stx,idx) & 0x03)
#define XP_STX_SIZE(stx,idx) (XP_STX_ACCESS(stx,idx) >> 0x02)
#define XP_STX_WORD_INDEXED (0x00)
#define XP_STX_BYTE_INDEXED (0x01)
#define XP_STX_CHAR_INDEXED (0x02)
#define XP_STX_WORD_OBJECT(stx,idx) \
((xp_stx_word_object_t*)XP_STX_OBJECT(stx,idx))
#define XP_STX_BYTE_OBJECT(stx,idx) \
((xp_stx_byte_object_t*)XP_STX_OBJECT(stx,idx))
#define XP_STX_CHAR_OBJECT(stx,idx) \
((xp_stx_char_object_t*)XP_STX_OBJECT(stx,idx))
#define XP_STX_WORDAT(stx,idx,n) \
(((xp_word_t*)(XP_STX_OBJECT(stx,idx) + 1))[n])
#define XP_STX_BYTEAT(stx,idx,n) \
(((xp_byte_t*)(XP_STX_OBJECT(stx,idx) + 1))[n])
#define XP_STX_CHARAT(stx,idx,n) \
(((xp_char_t*)(XP_STX_OBJECT(stx,idx) + 1))[n])
#ifdef __cplusplus
extern "C" {
#endif
xp_stx_t* xp_stx_open (xp_stx_t* stx, xp_word_t capacity);
void xp_stx_close (xp_stx_t* stx);
#ifdef __cplusplus
}
#endif
#endif