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gambas-source-code/main/gbx/gbx_exec.c
Benoît Minisini 54e8d1093e [INTERPRETER] 
* BUG: Fix an uninitialized flag in streams.
* BUG: Stack overflow raised when entering a function should not mix up 
  the interpreter anymore.

[GB.QTE]
* BUG: Fix compilation.


git-svn-id: svn://localhost/gambas/trunk@1664 867c0c6c-44f3-4631-809d-bfa615b0a4ec
2008-10-30 23:32:38 +00:00

1742 lines
31 KiB
C
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/***************************************************************************
gbx_exec.c
Subroutines for the interpreter : executing methods, native methods,
the NEW operator, the casting operator, etc.
(c) 2000-2007 Benoit Minisini <gambas@users.sourceforge.net>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 1, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
***************************************************************************/
#define __GBX_EXEC_C
#include "gb_common.h"
#include "gb_error.h"
#include "gbx_type.h"
#include <unistd.h>
#include <sys/time.h>
#include "gb_limit.h"
#include "gbx_subr.h"
#include "gbx_stack.h"
#include "gbx_debug.h"
#include "gbx_string.h"
#include "gbx_date.h"
#include "gbx_array.h"
#include "gbx_c_collection.h"
#include "gbx_api.h"
#include "gbx_exec.h"
//#define DEBUG_STACK 1
/* Current virtual machine state */
STACK_CONTEXT EXEC_current = { 0 };
/* Stack pointer */
VALUE *SP = NULL;
/* Current instruction opcode */
PCODE EXEC_code;
/* Temporary storage or return value of a native function */
VALUE TEMP;
/* Return value of a gambas function */
VALUE RET;
/* SUPER was used for this stack pointer */
VALUE *EXEC_super = NULL;
/* CPU endianness */
bool EXEC_big_endian;
/* Current iterator */
CENUM *EXEC_enum;
bool EXEC_debug = FALSE; // debugging mode
bool EXEC_arch = FALSE; // executing an archive
bool EXEC_fifo = FALSE; // debugging through a fifo
bool EXEC_keep_library = FALSE; // do not unload libraries
EXEC_HOOK EXEC_Hook = { NULL };
EXEC_FUNCTION EXEC;
bool EXEC_main_hook_done = FALSE;
int EXEC_return_value = 0;
bool EXEC_got_error = FALSE;
uint64_t EXEC_byref = 0;
void EXEC_init(void)
{
char test[4];
PC = NULL;
BP = NULL;
OP = NULL;
CP = NULL;
RP->type = T_VOID;
test[0] = 0xAA;
test[1] = 0xBB;
test[2] = 0xCC;
test[3] = 0xDD;
EXEC_big_endian = *((uint *)test) == 0xAABBCCDDL;
if (EXEC_big_endian)
fprintf(stderr, "** WARNING: CPU is big endian\n");
/*printf("%s endian\n", EXEC_big_endian ? "big" : "little");*/
DATE_init();
}
void EXEC_borrow(TYPE type, VALUE *value)
{
static const void *jump[16] = {
&&__NONE, &&__NONE, &&__NONE, &&__NONE, &&__NONE, &&__NONE, &&__NONE, &&__NONE, &&__NONE,
&&__STRING, &&__NONE, &&__VARIANT, &&__NONE, &&__FUNCTION, &&__NONE, &&__NONE
};
goto *jump[type];
__VARIANT:
if (value->_variant.vtype == T_STRING)
STRING_ref((*(char **)value->_variant.value));
else if (TYPE_is_object(value->_variant.vtype))
OBJECT_REF(*((void **)value->_variant.value), "BORROW");
return;
__FUNCTION:
OBJECT_REF(value->_function.object, "BORROW");
return;
__STRING:
STRING_ref(value->_string.addr);
__NONE:
return;
}
void UNBORROW(VALUE *value)
{
static const void *jump[16] = {
&&__NONE, &&__NONE, &&__NONE, &&__NONE, &&__NONE, &&__NONE, &&__NONE, &&__NONE, &&__NONE,
&&__STRING, &&__NONE, &&__VARIANT, &&__NONE, &&__FUNCTION, &&__NONE, &&__NONE
};
TYPE type = value->type;
if (TYPE_is_object(type))
{
OBJECT_UNREF_KEEP(value->_object.object, "UNBORROW");
return;
}
goto *jump[type];
__VARIANT:
if (value->_variant.vtype == T_STRING)
STRING_unref_keep((char **)value->_variant.value);
else if (TYPE_is_object(value->_variant.vtype))
OBJECT_UNREF_KEEP(*((void **)value->_variant.value), "UNBORROW");
return;
__FUNCTION:
OBJECT_UNREF_KEEP(value->_function.object, "UNBORROW");
return;
__STRING:
STRING_unref_keep(&value->_string.addr);
__NONE:
return;
}
void EXEC_release(TYPE type, VALUE *value)
{
static const void *jump[16] = {
&&__NONE, &&__NONE, &&__NONE, &&__NONE, &&__NONE, &&__NONE, &&__NONE, &&__NONE, &&__NONE,
&&__STRING, &&__NONE, &&__VARIANT, &&__ARRAY, &&__FUNCTION, &&__NONE, &&__NONE
};
goto *jump[type];
__VARIANT:
if (value->_variant.vtype == T_STRING)
STRING_unref((char **)value->_variant.value);
else if (TYPE_is_object(value->_variant.vtype))
OBJECT_UNREF(*((void **)value->_variant.value), "RELEASE");
return;
__FUNCTION:
OBJECT_UNREF(value->_function.object, "RELEASE");
return;
__ARRAY:
if (!value->_array.keep)
ARRAY_free(&value->_array.addr, (ARRAY_DESC *)value->_array.class->load->array[value->_array.index]);
return;
__STRING:
STRING_unref(&value->_string.addr);
__NONE:
return;
}
void RELEASE_many(VALUE *value, int n)
{
static const void *jump[16] = {
&&__NONE, &&__NONE, &&__NONE, &&__NONE, &&__NONE, &&__NONE, &&__NONE, &&__NONE, &&__NONE,
&&__STRING, &&__NONE, &&__VARIANT, &&__ARRAY, &&__FUNCTION, &&__NONE, &&__NONE
};
TYPE type;
while (n)
{
n--;
value--;
type = value->type;
if (TYPE_is_object(type))
{
OBJECT_UNREF(value->_object.object, "RELEASE");
continue;
}
goto *jump[type];
__VARIANT:
if (value->_variant.vtype == T_STRING)
STRING_unref((char **)value->_variant.value);
else if (TYPE_is_object(value->_variant.vtype))
OBJECT_UNREF(*((void **)value->_variant.value), "RELEASE");
continue;
__FUNCTION:
OBJECT_UNREF(value->_function.object, "RELEASE");
continue;
__ARRAY:
if (!value->_array.keep)
ARRAY_free(&value->_array.addr, (ARRAY_DESC *)value->_array.class->load->array[value->_array.index]);
continue;
__STRING:
STRING_unref(&value->_string.addr);
__NONE:
continue;
}
}
#if 0
void DUMP(VALUE *value)
{
static void *jump[16] = {
&&__NONE, &&__NONE, &&__NONE, &&__NONE, &&__NONE, &&__NONE, &&__NONE, &&__NONE,
&&__STRING, &&__NONE, &&__VARIANT, &&__ARRAY, &&__NONE, &&__FUNCTION, &&__NONE, &&__NONE
};
TYPE type = value->type;
printf("type = %p / ", (void *)type);
if (TYPE_is_object(type))
goto __OBJECT;
else
goto *jump[type];
__STRING:
printf("STRING %p\n", value->_string.addr);
return;
__OBJECT:
if (value->_object.object)
{
printf("OBJECT (%p)\n", value->_object.object);
printf("-> %s\n", OBJECT_class(value->_object.object)->name);
}
else
printf("OBJECT (NULL)\n");
return;
__VARIANT:
if (value->_variant.vtype == T_STRING)
printf("STRING %p\n", *((char **)value->_variant.value));
else if (TYPE_is_object(value->_variant.vtype))
printf("OBJECT (%s %p)\n", OBJECT_class(*((void **)value->_variant.value))->name, *((void **)value->_variant.value));
return;
__FUNCTION:
printf("FUNCTION %s (%s %p)\n", value->_function.class->name, OBJECT_class(value->_function.object)->name, value->_function.object);
return;
__ARRAY:
printf("ARRAY\n");
return;
__NONE:
printf("\n");
return;
}
#endif
void EXEC_release_return_value(void)
{
RELEASE(RP);
RP->type = T_VOID;
}
#define print_register() \
printf("| SP = %d BP = %d FP = %p PC = %p EC = %p\n", SP - (VALUE *)STACK_base, BP - (VALUE *)STACK_base, FP, PC, EC)
static bool exec_enter_can_quick(void)
{
int i;
FUNCTION *func;
int nparam = EXEC.nparam;
func = &EXEC.class->load->func[EXEC.index];
/* check number of arguments */
if (func->npmin < func->n_param || nparam != func->n_param || func->vararg)
return FALSE;
/* check arguments type */
for (i = 0; i < nparam; i++)
{
if (SP[i - nparam].type != func->param[i].type)
return FALSE;
}
return TRUE;
}
static void set_class_default(CLASS *class, VALUE *value, CTYPE ctype)
{
static const void *jump[] = {
&&__VOID, &&__BOOLEAN, &&__BYTE, &&__SHORT, &&__INTEGER, &&__LONG, &&__SINGLE, &&__FLOAT,
&&__DATE, &&__STRING, &&__STRING, &&__VARIANT, &&__ARRAY, &&__FUNCTION, &&__CLASS, &&__NULL,
&&__OBJECT
};
value->type = ctype.id;
goto *jump[ctype.id];
__BOOLEAN:
__BYTE:
__SHORT:
__INTEGER:
value->_integer.value = 0;
return;
__LONG:
value->_long.value = 0;
return;
__SINGLE:
__FLOAT:
value->_float.value = 0;
return;
__STRING:
value->_string.addr = NULL;
value->_string.start = 0;
value->_string.len = 0;
return;
__VARIANT:
value->_variant.vtype = T_NULL;
return;
__DATE:
value->_date.date = 0;
value->_date.time = 0;
return;
__VOID:
return;
__OBJECT:
if (ctype.value >= 0)
value->type = (TYPE)class->load->class_ref[ctype.value];
value->_object.object = NULL;
return;
__ARRAY:
value->_array.class = class;
value->_array.keep = FALSE;
value->_array.index = ctype.value;
ARRAY_new(&value->_array.addr, (ARRAY_DESC *)class->load->array[ctype.value]);
return;
__FUNCTION:
__CLASS:
__NULL:
ERROR_panic("VALUE_default: Unknown default type");
}
void EXEC_enter(void)
{
int i;
FUNCTION *func; // = EXEC.func;
int nparam = EXEC.nparam;
void *object = EXEC.object;
CLASS *class = EXEC.class;
#if DEBUG_STACK
printf("\n| >> EXEC_enter(%s, %ld, %d)\n", EXEC.class->name, EXEC.index, nparam);
print_register();
#endif
/*
func_id = value->index;
if (value->kind & FUNCTION_PUBLIC)
func_id = (int)(class->table[func_id].desc.method->exec;
*/
func = &class->load->func[EXEC.index];
#if DEBUG_STACK
if (func->debug)
printf(" | >> %s\n", func->debug->name);
#endif
/* check number of arguments */
if (nparam < func->npmin)
THROW(E_NEPARAM);
else if (nparam > func->n_param && !func->vararg)
THROW(E_TMPARAM);
/* mandatory arguments */
for (i = 0; i < func->npmin; i++)
{
VALUE_conv(SP - nparam + i, func->param[i].type);
/*BORROW(SP - nparam + i);*/
}
if (func->npmin < func->n_param)
{
/* optional arguments */
for (i = func->npmin; i < nparam; i++)
{
if (SP[- nparam + i].type == T_VOID)
SP[- nparam + i]._void.ptype = func->param[i].type;
else
{
VALUE_conv(SP - nparam + i, func->param[i].type);
/*BORROW(SP - nparam + i);*/
}
}
/* missing optional arguments */
if (nparam < func->n_param)
{
STACK_check(func->n_param - nparam);
for (i = nparam; i < func->n_param; i++)
{
SP->type = T_VOID;
SP->_void.ptype = func->param[i].type;
SP++;
}
}
}
/* save context & check stack*/
STACK_push_frame(&EXEC_current, func->stack_usage);
/* enter function */
BP = SP;
if (func->vararg)
PP = SP - (nparam - func->n_param);
else
PP = SP;
FP = func;
PC = func->code;
OP = object;
CP = class;
//AP = ARCH_from_class(CP);
EP = NULL;
if (func->error)
{
#if DEBUG_ERROR
printf("EXEC_enter: EC = PC + %d\n", func->error);
#endif
EC = PC + func->error;
}
else
EC = NULL;
/* reference the object so that it is not destroyed during the function call */
OBJECT_REF(OP, "EXEC_enter");
/*printf("PC = %p nparam = %d\n", PC, FP->n_param);*/
/* local variables initialization */
if (func->n_local)
{
for (i = 0; i < func->n_local; i++)
{
set_class_default(class, SP, func->local[i].type);
SP++;
}
}
/* control variables initialization */
if (func->n_ctrl)
{
for (i = 0; i < func->n_ctrl; i++)
{
SP->type = T_VOID;
SP++;
}
}
/*printf("EXEC_enter: nparam = %d nlocal = %d nctrl = %d\n", func->n_param, func->n_local, func->n_ctrl);*/
RP->type = T_VOID;
#if DEBUG_STACK
printf("| << EXEC_enter()\n");
print_register();
#endif
}
void EXEC_enter_check(bool defined)
{
if (defined && exec_enter_can_quick())
{
*PC = (*PC & 0xFF) | C_CALL_QUICK;
EXEC_enter_quick();
}
else
{
*PC = (*PC & 0xFF) | C_CALL_NORM;
EXEC_enter();
}
}
void EXEC_enter_quick(void)
{
int i;
FUNCTION *func;;
void *object = EXEC.object;
CLASS *class = EXEC.class;
#if DEBUG_STACK
printf("\n| >> EXEC_enter(%s, %ld, %d)\n", EXEC.class->name, EXEC.index, EXEC.nparam);
print_register();
#endif
func = &class->load->func[EXEC.index];
#if DEBUG_STACK
if (func->debug)
printf(" | >> %s\n", func->debug->name);
#endif
/* save context & check stack */
STACK_push_frame(&EXEC_current, func->stack_usage);
/* enter function */
BP = SP;
PP = SP;
FP = func;
PC = func->code;
OP = object;
CP = class;
EP = NULL;
if (func->error)
EC = PC + func->error;
else
EC = NULL;
/* reference the object so that it is not destroyed during the function call */
OBJECT_REF(OP, "EXEC_enter");
/* local variables initialization */
if (func->n_local)
{
for (i = 0; i < func->n_local; i++)
{
set_class_default(class, SP, func->local[i].type);
SP++;
}
}
/* control variables initialization */
if (func->n_ctrl)
{
for (i = 0; i < func->n_ctrl; i++)
{
SP->type = T_VOID;
SP++;
}
}
RP->type = T_VOID;
#if DEBUG_STACK
printf("| << EXEC_enter()\n");
print_register();
#endif
}
void EXEC_leave(bool drop)
{
int n, nb, i, nparam;
bool keep_ret_value = FALSE;
VALUE ret;
ushort *pc;
VALUE *xp, *pp;
int bit, nbyref;
ushort *pc_func;
int nbyref_func;
#if DEBUG_STACK
printf("| >> EXEC_leave\n");
print_register();
#endif
/* Save the return value. It can be erased by OBJECT_UNREF() */
//ret = *RP;
VALUE_copy(&ret, RP);
pc = STACK_get_previous_pc();
nb = 0;
nparam = FP->n_param;
/* ByRef arguments management */
if (!(pc && PCODE_is(pc[1], C_BYREF)))
goto __LEAVE_NORMAL;
pc++;
nbyref = 1 + (*pc & 0xF);
pc_func = FP->code;
if (!PCODE_is(*pc_func, C_BYREF))
goto __LEAVE_NORMAL;
nbyref_func = 1 + (*pc_func & 0xF);
if (nbyref_func < nbyref)
goto __LEAVE_NORMAL;
for (i = 1; i <= nbyref; i++)
{
if (pc[i] & ~pc_func[i])
goto __LEAVE_NORMAL;
}
xp = PP - nparam;
pp = xp;
for (i = 0, n = 0; i < nparam; i++)
{
bit = i & 15;
if (bit == 0)
n++;
if (n <= nbyref && (pc[n] & (1 << bit)))
{
//printf("pp[%d] -> pp[%d]\n", i, nb);
xp[nb] = *pp;
nb++;
}
else
{
//printf("pp[%d] release (%d)\n", i, pp->type);
RELEASE(pp);
}
pp++;
}
pc--;
n = SP - PP;
#if DEBUG_STACK
printf("release = %d, nparam = %d, byref = %d\n", n, FP->n_param, nb);
#endif
RELEASE_MANY(SP, n);
SP -= nparam;
SP += nb;
OBJECT_UNREF(OP, "EXEC_leave");
SP -= nb;
STACK_pop_frame(&EXEC_current);
PC += nbyref + 1;
goto __RETURN_VALUE;
__LEAVE_NORMAL:
n = nparam + (SP - PP);
RELEASE_MANY(SP, n);
OBJECT_UNREF(OP, "EXEC_leave");
STACK_pop_frame(&EXEC_current);
__RETURN_VALUE:
if (pc && !drop)
{
drop = PCODE_is_void(*pc);
if (SP[-1].type == T_FUNCTION)
{
SP--;
OBJECT_UNREF(SP->_function.object, "EXEC_leave");
}
}
else
{
drop = TRUE;
keep_ret_value = TRUE;
}
if (!drop)
{
//*SP = ret;
COPY_VALUE(SP, &ret);
RP->type = T_VOID;
if (PCODE_is_variant(*PC))
VALUE_conv(SP, T_VARIANT);
SP++;
}
else if (!keep_ret_value)
EXEC_release_return_value();
SP += nb;
#if DEBUG_STACK
printf("| << EXEC_leave()\n");
print_register();
printf("\n");
#endif
return;
}
void EXEC_function_real()
{
// We need to push a void frame, because EXEC_leave looks at *PC to know if a return value is expected
STACK_push_frame(&EXEC_current, 0);
PC = NULL;
TRY
{
EXEC_enter();
}
CATCH
{
STACK_pop_frame(&EXEC_current);
PROPAGATE();
}
END_TRY
EXEC_function_loop();
}
void EXEC_function_loop()
{
bool retry = FALSE;
if (PC != NULL)
{
do
{
TRY
{
EXEC_loop();
retry = FALSE;
}
CATCH
{
// QUIT was called
if (ERROR->info.code == E_ABORT)
{
#if DEBUG_ERROR
printf("#0 QUIT\n");
#endif
ERROR_lock();
while (PC != NULL)
EXEC_leave(TRUE);
ERROR_unlock();
//STACK_pop_frame(&EXEC_current);
PROPAGATE();
}
// We are in a TRY
else if (EP != NULL)
{
#if DEBUG_ERROR
printf("#1 EP = %d SP = %d\n", EP - (VALUE *)STACK_base, SP - (VALUE *)STACK_base);
#endif
ERROR_set_last();
while (SP > EP)
POP();
PC = EC;
EP = NULL;
retry = TRUE;
/* On va directement sur le END TRY */
}
// There is a CATCH in the function
else if (EC != NULL)
{
#if DEBUG_ERROR
printf("#2 EC = %p\n", EC);
#endif
ERROR_set_last();
PC = EC;
EC = NULL;
retry = TRUE;
}
// There is no event handler in the function
else
{
#if DEBUG_ERROR
printf("#3\n");
#endif
ERROR_set_last();
if (EXEC_debug && !STACK_has_error_handler())
{
if (TP && TC)
{
ERROR_lock();
while (BP > TP)
{
EXEC_leave(TRUE);
if (!PC)
STACK_pop_frame(&EXEC_current);
}
while (SP > TP)
POP();
PC = TC;
ERROR_unlock();
}
DEBUG.Main(TRUE);
retry = TRUE;
}
else
{
ERROR_lock();
while (PC != NULL && EC == NULL)
EXEC_leave(TRUE);
ERROR_unlock();
if (PC == NULL)
{
/*printf("try to propagate\n");*/
STACK_pop_frame(&EXEC_current);
PROPAGATE();
/*ERROR_print();
exit(1);*/
/*retry = FALSE;*/
}
if (EP != NULL)
{
#if DEBUG_ERROR
printf("#1 EP = %d SP = %d\n", EP - (VALUE *)STACK_base, SP - (VALUE *)STACK_base);
#endif
ERROR_lock();
while (SP > EP)
POP();
ERROR_unlock();
EP = NULL;
/* On va directement sur le END TRY */
}
PC = EC;
EC = NULL;
retry = TRUE;
}
}
while (SP < EXEC_super)
EXEC_super = ((VALUE *)EXEC_super)->_object.super;
}
END_TRY
#if DEBUG_ERROR
if (retry)
printf("retry %p\n", PC);
#endif
}
while (retry);
}
STACK_pop_frame(&EXEC_current);
}
static bool exec_native_can_quick(void)
{
CLASS_DESC_METHOD *desc = EXEC.desc;
int i;
int nparam = EXEC.nparam;
/* check number of arguments */
//fprintf(stderr, "exec_native_can_quick: %s.%s(%d) npmin:%d npmax:%d npvar:%d\n", desc->class->name, desc->name, nparam, desc->npmin, desc->npmax, desc->npvar);
if (desc->npmin < desc->npmax || nparam != desc->npmin || desc->npvar)
return FALSE;
/* check arguments type */
for (i = 0; i < nparam; i++)
{
if (SP[i - nparam].type != desc->signature[i])
return FALSE;
}
return TRUE;
}
void EXEC_native_check(bool defined)
{
if (defined && exec_native_can_quick())
{
*PC = (*PC & 0xFF) | C_CALL_QUICK;
EXEC_native_quick();
}
else
{
*PC = (*PC & 0xFF) | C_CALL_NORM;
EXEC_native();
}
}
bool EXEC_call_native(void (*exec)(), void *object, TYPE type, VALUE *param)
{
GAMBAS_Error = FALSE;
(*exec)(object, (void *)param);
if (TYPE_is_pure_object(type) && TEMP.type != T_NULL && TEMP.type != T_VOID)
{
if (TEMP.type == T_CLASS)
TEMP._class.class = (CLASS *)type;
else
TEMP.type = type;
}
if (GAMBAS_Error)
{
GAMBAS_Error = FALSE;
return TRUE;
}
else
return FALSE;
}
void EXEC_native_quick(void)
{
CLASS_DESC_METHOD *desc = EXEC.desc;
bool drop = EXEC.drop;
int nparam = EXEC.nparam;
//bool use_stack = EXEC.use_stack; // Always TRUE
void *object = EXEC.object;
bool error;
void *free_later;
VALUE ret;
error = EXEC_call_native(desc->exec, object, desc->type, &SP[-nparam]);
COPY_VALUE(&ret, &TEMP);
RELEASE_MANY(SP, nparam);
if (error)
{
POP();
PROPAGATE();
}
/* Si la description de la fonction se trouve sur la pile */
SP--;
free_later = SP->_function.object;
SP->type = T_NULL;
if (desc->type == T_VOID)
{
if (!drop)
{
SP->type = T_VOID;
SP->_void.ptype = T_NULL;
SP++;
}
}
else
{
BORROW(&ret);
if (drop)
{
RELEASE(&ret);
}
else
{
//*SP = ret;
COPY_VALUE(SP, &ret);
SP++;
}
}
OBJECT_UNREF(free_later, "EXEC_native (FUNCTION)");
#if DEBUG_STACK
printf("| << EXEC_native: %s (%p)\n", desc->name, &desc);
#endif
}
void EXEC_native(void)
{
CLASS_DESC_METHOD *desc = EXEC.desc;
bool drop = EXEC.drop;
int nparam = EXEC.nparam;
bool use_stack = EXEC.use_stack;
void *object = EXEC.object;
int i; /* ,j */
VALUE *value;
TYPE *sign;
bool error;
void * NO_WARNING(free_later);
int n;
VALUE ret;
#if DEBUG_STACK
printf("| >> EXEC_native: %s.%s (%p)\n", EXEC.class->name, desc->name, &desc);
#endif
//printf("EXEC_native: nparam = %d desc->npvar = %d\n", nparam, desc->npvar);
if (nparam < desc->npmin)
THROW(E_NEPARAM);
if (!desc->npvar)
{
if (nparam > desc->npmax)
THROW(E_TMPARAM);
value = &SP[-nparam];
sign = desc->signature;
for (i = 0; i < desc->npmin; i++, value++, sign++)
VALUE_conv(value, *sign);
if (desc->npmin < desc->npmax)
{
for (; i < nparam; i++, value++, sign++)
{
if (value->type != T_VOID)
VALUE_conv(value, *sign);
}
n = desc->npmax - nparam;
STACK_check(n);
SP += n;
nparam = desc->npmax;
for (; i < nparam; i++, value++)
value->type = T_VOID;
}
}
else
{
value = &SP[-nparam];
sign = desc->signature;
for (i = 0; i < desc->npmin; i++, value++, sign++)
VALUE_conv(value, *sign);
if (desc->npmin < desc->npmax)
{
if (nparam < desc->npmax)
{
for (; i < nparam; i++, value++, sign++)
{
if (value->type != T_VOID)
VALUE_conv(value, *sign);
}
n = desc->npmax - nparam;
STACK_check(n);
SP += n;
nparam = desc->npmax;
for (; i < nparam; i++, value++)
value->type = T_VOID;
}
else
{
for (; i < desc->npmax; i++, value++, sign++)
{
if (value->type != T_VOID)
VALUE_conv(value, *sign);
}
}
}
if (desc->npmax < nparam)
EXEC.nparvar = nparam - desc->npmax;
else
EXEC.nparvar = 0;
for (; i < nparam; i++, value++)
VARIANT_undo(value);
//printf("EXEC_native: nparvar = %d\n", EXEC.nparvar);
}
error = EXEC_call_native(desc->exec, object, desc->type, &SP[-nparam]);
COPY_VALUE(&ret, &TEMP);
/* Lib<69>ation des arguments */
/*while (nparam > 0)
{
nparam--;
POP();
}*/
RELEASE_MANY(SP, nparam);
/* Si la description de la fonction se trouve sur la pile */
if (use_stack)
{
SP--;
free_later = SP->_function.object;
SP->type = T_NULL;
}
/*
#if DEBUG_STACK
else
printf("** SP != func SP = %p func = %p **\n>", SP, func);
#endif
*/
if (!error)
{
if (desc->type == T_VOID)
{
if (!drop)
{
SP->type = T_VOID;
SP->_void.ptype = T_NULL;
SP++;
}
}
else
{
BORROW(&ret);
if (drop)
{
RELEASE(&ret);
}
else
{
//VALUE_conv(&ret, desc->type);
//*SP = ret;
COPY_VALUE(SP, &ret);
SP++;
}
}
}
if (use_stack)
OBJECT_UNREF(free_later, "EXEC_native (FUNCTION)");
if (error)
PROPAGATE();
#if DEBUG_STACK
printf("| << EXEC_native: %s (%p)\n", desc->name, &desc);
#endif
}
void EXEC_object(VALUE *val, CLASS **pclass, OBJECT **pobject, bool *pdefined)
{
static const void *jump[] = {
&&__ERROR, &&__ERROR, &&__ERROR, &&__ERROR, &&__ERROR, &&__ERROR, &&__ERROR, &&__ERROR, &&__ERROR,
&&__ERROR, &&__ERROR, &&__VARIANT, &&__ERROR, &&__FUNCTION, &&__CLASS, &&__NULL,
&&__OBJECT
};
CLASS *class;
OBJECT *object;
bool defined;
__RETRY:
if (TYPE_is_pure_object(val->type))
goto __PURE_OBJECT;
else
goto *jump[val->type];
__FUNCTION:
if (val->_function.kind == FUNCTION_UNKNOWN)
{
EXEC.property = TRUE;
EXEC.unknown = CP->load->unknown[val->_function.index];
EXEC_special(SPEC_UNKNOWN, val->_function.class, val->_function.object, 0, FALSE);
object = val->_function.object;
OBJECT_UNREF(object, "EXEC_object (FUNCTION)");
SP--;
//*val = *SP;
COPY_VALUE(val, SP);
goto __RETRY;
}
else
goto __ERROR;
__CLASS:
class = val->_class.class;
object = NULL;
defined = TRUE;
CLASS_load(class);
goto __RETURN;
__OBJECT:
object = val->_object.object;
class = OBJECT_class(object);
defined = FALSE;
goto __CHECK;
__PURE_OBJECT:
object = val->_object.object;
class = val->_object.class;
defined = TRUE;
if (val == EXEC_super)
{
EXEC_super = val->_object.super;
//*class = (*class)->parent;
if (!class)
THROW(E_PARENT);
}
else if (!class->is_virtual)
class = OBJECT_class(object);
else if (!object)
{
/* A null object and a virtual class means that we want to pass a static class */
CLASS_load(class);
goto __RETURN;
}
goto __CHECK;
__VARIANT:
if (val->_variant.vtype == T_OBJECT)
{
object = *((void **)val->_variant.value);
class = OBJECT_class(object);
defined = FALSE;
goto __CHECK;
}
else if (TYPE_is_object(val->_variant.vtype))
{
object = *((void **)val->_variant.value);
class = (CLASS *)val->_variant.vtype;
if (!class->is_virtual)
class = OBJECT_class(object); /* Virtual dispatching */
defined = FALSE;
goto __CHECK;
}
else
goto __ERROR;
__ERROR:
THROW(E_NOBJECT);
__NULL:
THROW(E_NULL);
__CHECK:
if (!object)
goto __NULL;
CLASS_load(class);
if (class->check && (*(class->check))(object))
THROW(E_IOBJECT);
__RETURN:
*pclass = class;
*pobject = object;
*pdefined = defined;
}
void EXEC_public(CLASS *class, void *object, const char *name, int nparam)
{
CLASS_DESC *desc;
desc = CLASS_get_symbol_desc_kind(class, name, (object != NULL) ? CD_METHOD : CD_STATIC_METHOD, 0);
if (desc == NULL)
return;
EXEC.class = desc->method.class;
EXEC.object = object;
EXEC.nparam = nparam;
EXEC.drop = TRUE;
if (FUNCTION_is_native(&desc->method))
{
EXEC.desc = &desc->method;
EXEC.use_stack = FALSE;
EXEC_native();
}
else
{
EXEC.index = (int)(intptr_t)desc->method.exec;
//EXEC.func = &class->load->func[(long)desc->method.exec]
EXEC_function();
}
}
bool EXEC_spec(int special, CLASS *class, void *object, int nparam, bool drop)
{
CLASS_DESC *desc;
short index = class->special[special];
if (index == NO_SYMBOL)
return TRUE;
desc = CLASS_get_desc(class, index);
if (CLASS_DESC_get_type(desc) == CD_STATIC_METHOD)
{
if (object != NULL)
return TRUE;
}
else
{
if (object == NULL)
{
if (class->auto_create)
object = EXEC_auto_create(class, FALSE);
if (object == NULL)
THROW(E_NOBJECT);
}
}
EXEC.class = desc->method.class;
EXEC.object = object;
EXEC.nparam = nparam;
EXEC.drop = drop;
/*printf("<< EXEC_spec: SP = %d\n", SP - (VALUE *)STACK_base);
save_SP = SP;*/
if (FUNCTION_is_native(&desc->method))
{
EXEC.desc = &desc->method;
EXEC.use_stack = FALSE;
EXEC.native = TRUE;
EXEC_native();
}
else
{
//EXEC.func = &class->load->func[(long)desc->method.exec]
EXEC.index = (int)(intptr_t)desc->method.exec;
EXEC.native = FALSE;
EXEC_function_real(!drop);
if (!drop)
{
//*SP++ = *RP;
COPY_VALUE(SP, RP);
SP++;
RP->type = T_VOID;
}
}
/*printf(">> EXEC_spec: SP = %d\n", SP - (VALUE *)STACK_base);
if (SP != save_SP)
printf("**** SP should be %d\n", save_SP - (VALUE *)STACK_base);*/
return FALSE;
}
/* static void dump(int np) */
/* { */
/* int i; */
/* */
/* for (i = 1; i <= np; i++) */
/* printf("SP[%d] = %d ", -i, SP[-i].type); */
/* */
/* printf("\n"); */
/* } */
/* */
/*
The highest parent method is called first, but get only the parameters
not consumed by the child methods.
*/
void EXEC_special_inheritance(int special, CLASS *class, OBJECT *object, int nparam, boolean drop)
{
CLASS *her[MAX_INHERITANCE];
int npher[MAX_INHERITANCE];
int nher;
int i, np;
CLASS_DESC *desc;
short index;
/*if (class->parent != NULL)
EXEC_special_inheritance(special, class->parent, object, 0, drop);*/
nher = CLASS_get_inheritance(class, her);
for(i = 0, np = 0; i < nher; i++)
{
class = her[i];
npher[i] = np;
index = class->special[special];
if (index == NO_SYMBOL)
continue;
desc = CLASS_get_desc(class, index); //class->special[special];
np += desc->method.npmax;
}
for(;;)
{
nher--;
if (nher < 0)
break;
class = her[nher];
if (special == SPEC_NEW)
{
if (!CLASS_is_native(class))
{
EXEC.class = class;
EXEC.object = object;
EXEC.index = FUNC_INIT_DYNAMIC;
//EXEC.func = &class->load->func[FUNC_INIT_DYNAMIC];
EXEC.native = FALSE;
EXEC.nparam = 0;
EXEC_function();
}
}
index = class->special[special];
if (index == NO_SYMBOL)
continue;
desc = CLASS_get_desc(class, index); // class->special[special];
/*np = Min(nparam, desc->method.npmax);*/
np = Max(0, nparam - npher[nher]);
EXEC_special(special, class, object, np, drop);
nparam -= np;
}
}
void *EXEC_create_object(CLASS *class, int np, char *event)
{
void *object;
CLASS_load(class);
if (class->no_create)
THROW(E_CSTATIC, class->name);
OBJECT_new(&object, class, event, ((OP == NULL) ? (OBJECT *)CP : (OBJECT *)OP));
TRY
{
OBJECT_lock(object, TRUE);
EXEC_special_inheritance(SPEC_NEW, class, object, np, TRUE);
OBJECT_lock(object, FALSE);
// SP--; /* class */
//
// SP->_object.class = class;
// SP->_object.object = object;
// SP++;
}
CATCH
{
// _free() methods should not be called, but we must
OBJECT_UNREF(object, "EXEC_new");
PROPAGATE();
// SP--; /* class */
// SP->type = T_NULL;
// SP++;
// PROPAGATE();
}
END_TRY
return object;
}
void EXEC_new(void)
{
CLASS *class;
int np;
boolean event;
void *object;
char *name = NULL;
char *cname = NULL;
np = *PC & 0xFF;
event = np & CODE_NEW_EVENT;
np &= 0x3F;
/* Instanciation */
SP -= np;
if (SP->type == T_CLASS)
{
class = SP->_class.class;
}
else if (TYPE_is_string(SP->type))
{
STRING_copy_from_value_temp(&cname, SP);
class = CLASS_find(cname);
RELEASE(SP);
SP->type = T_NULL;
}
else
THROW(E_TYPE, "String", TYPE_get_name(SP->type));
SP += np;
//printf("**** NEW %s\n", class->name);
CLASS_load(class);
if (class->no_create)
THROW(E_CSTATIC, class->name);
if (event)
{
SP--;
if (!TYPE_is_string(SP->type))
THROW(E_TYPE, "String", TYPE_get_name(SP->type));
STRING_copy_from_value_temp(&name, SP);
//printf("**** name %s\n", class->name);
STRING_ref(name);
OBJECT_new(&object, class, name, ((OP == NULL) ? (OBJECT *)CP : (OBJECT *)OP));
STRING_unref(&name);
RELEASE(SP);
np -= 2;
}
else
{
OBJECT_new(&object, class, name, ((OP == NULL) ? (OBJECT *)CP : (OBJECT *)OP));
np--;
}
/*OBJECT_REF(object, "EXEC_new");*/
/* On retourne l'objet cr<63> */
TRY
{
OBJECT_lock(object, TRUE);
EXEC_special_inheritance(SPEC_NEW, class, object, np, TRUE);
OBJECT_lock(object, FALSE);
SP--; /* class */
SP->_object.class = class;
SP->_object.object = object;
SP++;
}
CATCH
{
// _free() methods should not be called, but we must
OBJECT_UNREF(object, "EXEC_new");
//(*class->free)(class, object);
SP--; /* class */
SP->type = T_NULL;
SP++;
PROPAGATE();
}
END_TRY
/* PUSH(); */
/* L'objet a <20><>cr<63> avec un nombre de r<><72>ence <20>al <20>1.
On remet ce nombre <20>0 maintenant que l'objet est pr<70>.
Mais on ne le d<>ruit pas ! */
/* OBJECT_UNREF(&object, "EXEC_new"); */
}
#if 0
void EXEC_class(void)
{
//fprintf(stderr, ">> EXEC_class: SP = %d drop = %d\n", SP - (VALUE *)STACK_base, EXEC.drop);
if (EXEC_special(SPEC_CALL, EXEC.class, EXEC.object, EXEC.nparam, EXEC.drop))
{
if (EXEC.nparam < 1)
THROW(E_NEPARAM);
else if (EXEC.nparam > 1)
THROW(E_TMPARAM);
VALUE_conv(SP - 1, (TYPE)EXEC.class);
}
else
{
#if 0
if (RP->type != T_VOID) /* Ceci est fait pour un EXEC_native, mais pas pour un EXEC_function */
{
BORROW(RP);
SP[-1] = *RP; /* On <20>rase la classe */
EXEC_release_return_value();
}
else
POP(); /* On enl<6E>e la classe */
#endif
/* Class is replaced by return value */
if (!EXEC.drop)
{
VALUE swap;
swap = SP[-2];
SP[-2] = SP[-1];
SP[-1] = swap;
}
}
//fprintf(stderr, "<< EXEC_class: SP = %d\n\n", SP - (VALUE *)STACK_base);
}
#endif
void EXEC_ILLEGAL(void)
{
THROW(E_ILLEGAL);
}
void EXEC_quit(void)
{
GAMBAS_DoNotRaiseEvent = TRUE;
HOOK(quit)();
THROW(E_ABORT);
}
void *EXEC_auto_create(CLASS *class, bool ref)
{
void *object;
object = CLASS_auto_create(class, 0); /* object is checked by CLASS_auto_create */
if (ref)
OBJECT_REF(object, "EXEC_auto_create");
return object;
}
void EXEC_dup(int n)
{
VALUE *src;
STACK_check(n);
src = SP - n;
while (n > 0)
{
BORROW(src);
*SP++ = *src++;
n--;
}
}
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