qse/ase/stx/context.c
2008-03-04 05:21:33 +00:00

76 lines
1.7 KiB
C

/*
* $Id: context.c 118 2008-03-03 11:21:33Z baconevi $
*/
#include <ase/stx/context.h>
#include <ase/stx/object.h>
#include <ase/stx/class.h>
#include <ase/stx/misc.h>
ase_word_t ase_stx_new_context (ase_stx_t* stx,
ase_word_t method, ase_word_t args, ase_word_t temp)
{
ase_word_t context;
ase_stx_context_t* obj;
context = ase_stx_alloc_word_object(
stx, ASE_NULL, ASE_STX_CONTEXT_SIZE, ASE_NULL, 0);
obj = (ase_stx_context_t*)ASE_STX_OBJECT(stx,context);
obj->header.class = ase_stx_lookup_class(stx,ASE_T("Context"));
obj->ip = ASE_STX_TO_SMALLINT(0);
obj->method = method;
obj->arguments = args;
obj->temporaries = temp;
return context;
}
static ase_byte_t __fetch_byte (
ase_stx_t* stx, ase_stx_context_t* context_obj)
{
ase_word_t ip, method;
ase_assert (ASE_STX_IS_SMALLINT(context_obj->ip));
ip = ASE_STX_FROM_SMALLINT(context_obj->ip);
method = context_obj->method;
/* increment instruction pointer */
context_obj->ip = ASE_STX_TO_SMALLINT(ip + 1);
ase_assert (ASE_STX_TYPE(stx,method) == ASE_STX_BYTE_INDEXED);
return ASE_STX_BYTE_AT(stx,method,ip);
}
int ase_stx_run_context (ase_stx_t* stx, ase_word_t context)
{
ase_byte_t byte, operand;
ase_stx_context_t* context_obj;
context_obj = (ase_stx_context_t*)ASE_STX_OBJECT(stx,context);
while (!stx->__wantabort) {
/* check_process_switch (); // hopefully */
byte = __fetch_byte (stx, context_obj);
#ifdef _DOS
printf (ASE_T("code: %x\n"), byte);
#else
ase_printf (ASE_T("code: %x\n"), byte);
#endif
switch (byte) {
case PUSH_OBJECT:
operand = __fetch_byte (stx, context_obj);
break;
case SEND_UNARY_MESSAGE:
operand = __fetch_byte (stx, context_obj);
break;
case HALT:
goto exit_run_context;
}
}
exit_run_context:
return 0;
}