OpenEuphoria

Re: Andrea Cini's euwingui

• Posted by jimcbrown (admin) Nov 11, 2010
• 4065 views

It might not have been as easy as I thought. I wrote the following shim code, but EuWinGUI no longer crashes but doesn't seem to work either.

// libconvert.dll 
// tested with 4.0.0RC1's euphoria.h but this code is designed to work 
// with 3.1.1's euphoria.h as well 
#include <include/euphoria.h> 
 
#ifdef _WIN32 
#define DLLEXTERN extern __declspec(dllexport) 
#define DLLEXPORT __declspec(dllexport) 
// Use Heap functions for everything. 
void * ddefault_heap = NULL; 
#include <windows.h> 
#define hmalloc(n) HeapAlloc((void *)ddefault_heap, 0, n) 
#define hfree(p) HeapFree((void *)ddefault_heap, 0, p) 
#define hrealloc(p, n) HeapReAlloc((void *)ddefault_heap, 0, p, n) 
#else 
#define DLLEXTERN extern 
#define DLLEXPORT 
#define hmalloc(n) malloc(n) 
#define hfree(p) free(p) 
#define hrealloc(p, n) realloc(p, n) 
#endif 
 
DLLEXTERN void * atom_to_v3(void * param); 
DLLEXTERN void * atom_to_v4(void * param); 
DLLEXTERN void * sequence_to_v3(void * param); 
DLLEXTERN void * sequence_to_v4(void * param); 
DLLEXTERN void * object_to_v3(void * param); 
DLLEXTERN void * object_to_v4(void * param); 
 
struct s1v4 { 
	object_ptr base; 
	long length; 
	long ref; 
	long postfill; 
	void * cleanup; 
}; 
 
struct dv4 { 
	double dbl; 
	long ref; 
	void * cleanup; 
}; 
 
typedef struct dv4  *dv4_ptr; 
typedef struct s1v4 *s1v4_ptr; 
 
#define DBL_PTR4(ob) ( (dv4_ptr)  (((unsigned)(ob)) << 3) ) 
#define SEQ_PTR4(ob) ( (s1v4_ptr) (((unsigned)(ob)) << 3) )  
 
struct s1v3 { 
	object_ptr base; 
	long length; 
	long ref; 
	long postfill; 
}; 
 
struct dv3 { 
	double dbl; 
	long ref; 
}; 
 
typedef struct dv3  *dv3_ptr; 
typedef struct s1v3 *s1v3_ptr; 
 
#define DBL_PTR3(ob) ( (dv3_ptr)  (((unsigned)(ob)) << 3) ) 
#define SEQ_PTR3(ob) ( (s1v3_ptr) (((unsigned)(ob)) << 3) )  
 
void init() 
{ 
#ifdef _WIN32 
	if (ddefault_heap == NULL) 
		ddefault_heap = GetProcessHeap(); 
		//ddefault_heap = HeapCreate(0,0,0); 
#endif 
} 
 
DLLEXPORT void * atom_to_v3(void * param) 
{ 
	dv4_ptr d4; 
	dv3_ptr d3; 
	object atom = (object)param; 
	if (IS_ATOM_INT(atom) || atom == NOVALUE) 
	{ 
		return param; 
	} 
	if (!(IS_ATOM(atom))) 
	{ 
		return NULL; 
	} 
	init(); 
	d4 = DBL_PTR4(atom); 
	d3 = (dv3_ptr)hmalloc(sizeof(struct dv3)); 
	d3->dbl = d4->dbl; 
	d3->ref = 2; // not safe to free, so keep forever 
	//d4->ref--; 
	return (void *)(MAKE_DBL(d3)); 
} 
 
DLLEXPORT void * atom_to_v4(void * param) 
{ 
	dv4_ptr d4; 
	dv3_ptr d3; 
	object atom = (object)param; 
	if (IS_ATOM_INT(atom) || atom == NOVALUE) 
	{ 
		return param; 
	} 
	if (!(IS_ATOM(atom))) 
	{ 
		return NULL; 
	} 
	init(); 
	d3 = DBL_PTR3(atom); 
	d4 = (dv4_ptr)hmalloc(sizeof(struct dv4)); 
	d4->dbl = d3->dbl; 
	d4->ref = 2; // not safe to free, so keep forever 
	d4->cleanup = NULL; 
	//d3->ref--; 
	return (void *)(MAKE_DBL(d4)); 
} 
 
DLLEXPORT void * sequence_to_v3(void * param) 
{ 
	int i; 
	s1v4_ptr s4; 
	s1v3_ptr s3; 
	object atom = (object)param; 
	if (!(IS_SEQUENCE(atom))) 
	{ 
		return NULL; 
	} 
	init(); 
	s4 = SEQ_PTR4(atom); 
	s3 = (s1v3_ptr)hmalloc(sizeof(struct s1v3) + (s4->length + 1) * sizeof(object)); 
	s3->ref = 2; // not safe to free, so keep forever 
	s3->base = (object_ptr)(s3 + 1); 
	s3->base[s4->length] = NOVALUE; 
	for (i = 0; i < s4->length; i++) 
	{ 
		s3->base[i] = (object)object_to_v3((void*)(s4->base[i])); 
	} 
	s3->length = s4->length; 
	s3->postfill = s4->postfill; // is this right? 
	s3->base--; // point to "0th" element 
	//s4->ref--; 
	return (void *)(MAKE_SEQ(s3)); 
} 
 
DLLEXPORT void * sequence_to_v4(void * param) 
{ 
	int i; 
	s1v4_ptr s4; 
	s1v3_ptr s3; 
	object atom = (object)param; 
	if (!(IS_SEQUENCE(atom))) 
	{ 
		return NULL; 
	} 
	init(); 
	s3 = SEQ_PTR3(atom); 
	s4 = (s1v4_ptr)hmalloc(sizeof(struct s1v4) + (s3->length + 1) * sizeof(object)); 
	s4->ref = 2; // not safe to free, so keep forever 
	s4->base = (object_ptr)(s4 + 1); 
	s4->base[s3->length] = NOVALUE; 
	for (i = 0; i < s3->length; i++) 
	{ 
		s4->base[i] = (object)object_to_v4((void*)(s3->base[i])); 
	} 
	s4->length = s3->length; 
	s4->postfill = s3->postfill; // is this right? 
	s4->cleanup = NULL; 
	s4->base--; // point to "0th" element 
	//s3->ref--; 
	return (void *)(MAKE_SEQ(s4)); 
} 
 
DLLEXPORT void * object_to_v3(void * param) 
{ 
	object atom = (object)param; 
	if (IS_ATOM_INT(atom) || atom == NOVALUE) 
	{ 
		return param; 
	} 
	if (IS_SEQUENCE(atom)) 
	{ 
		return sequence_to_v3(param); 
	} 
	return atom_to_v3(param); 
} 
 
DLLEXPORT void * object_to_v4(void * param) 
{ 
	object atom = (object)param; 
	if (IS_ATOM_INT(atom) || atom == NOVALUE) 
	{ 
		return param; 
	} 
	if (IS_SEQUENCE(atom)) 
	{ 
		return sequence_to_v4(param); 
	} 
	return atom_to_v4(param); 
} 

Here are the required changes to EuWinGUI.ew

AM = C_POINTER, 
SQ = C_POINTER 
--AM = E_ATOM, 
--SQ = E_SEQUENCE 
 
atom object_to_v3, object_to_v4, v3helper 
 
function v3_c_func(atom x, sequence p) 
	object ret, r, q 
	q = "" 
	for i = 1 to length(p) do 
		q &= 0 
		q[i] = c_func(object_to_v3, {p[i]}) 
	end for 
	ret = c_func(x, q) 
	r = c_func(object_to_v4, {ret}) 
	return r 
end function 
procedure v3_c_proc(atom x, sequence p) 
	object q 
	q = "" 
	for i = 1 to length(p) do 
		q &= 0 
		q[i] = c_func(object_to_v3, {p[i]}) 
	end for 
	c_proc(x, q) 
end procedure 
                   
procedure link() 
v3helper = indll("LIBCONVERT.DLL") 
object_to_v3 = infunc(v3helper,"object_to_v3",{E_OBJECT},C_POINTER) 
object_to_v4 = infunc(v3helper,"object_to_v4",{C_POINTER},E_OBJECT) 
EWG = indll("EuWinGUI.DLL")