Ejemplo n.º 1
0
func NewFunctionBuilder(fi *gi.FunctionInfo) *FunctionBuilder {
	fb := new(FunctionBuilder)
	fb.Function = fi

	// prepare an array of ArgInfos
	for i, n := 0, fi.NumArg(); i < n; i++ {
		arg := fi.Arg(i)
		fb.OrigArgs = append(fb.OrigArgs, arg)
	}

	// build skip list
	var skiplist []int
	for _, arg := range fb.OrigArgs {
		ti := arg.Type()

		len := ti.ArrayLength()
		if len != -1 {
			skiplist = append(skiplist, len)
		}

		clo := arg.Closure()
		if clo != -1 {
			skiplist = append(skiplist, clo)
		}

		des := arg.Destroy()
		if des != -1 {
			skiplist = append(skiplist, des)
		}
	}

	// then walk over arguments
	for i, ai := range fb.OrigArgs {
		if IntSliceContains(skiplist, i) {
			continue
		}

		ti := ai.Type()

		switch ai.Direction() {
		case gi.DIRECTION_IN:
			fb.Args = append(fb.Args, FunctionBuilderArg{i, ai, ti})
		case gi.DIRECTION_INOUT:
			fb.Args = append(fb.Args, FunctionBuilderArg{i, ai, ti})
			fb.Rets = append(fb.Rets, FunctionBuilderArg{i, ai, ti})
		case gi.DIRECTION_OUT:
			fb.Rets = append(fb.Rets, FunctionBuilderArg{i, ai, ti})
		}
	}

	// add return value if it exists to 'rets'
	if ret := fi.ReturnType(); ret != nil && ret.Tag() != gi.TYPE_TAG_VOID {
		fb.Rets = append(fb.Rets, FunctionBuilderArg{-1, nil, ret})
	}

	// add GError special argument (if any)
	if fi.Flags()&gi.FUNCTION_THROWS != 0 {
		fb.Rets = append(fb.Rets, FunctionBuilderArg{-2, nil, nil})
	}

	return fb
}
Ejemplo n.º 2
0
func CFuncForwardDeclaration(fi *gi.FunctionInfo, container *gi.BaseInfo) {
	symbol := fi.Symbol()
	if _, declared := declared_c_funcs[symbol]; declared {
		return
	}

	declared_c_funcs[symbol] = true

	flags := fi.Flags()
	narg := fi.NumArg()
	if flags&gi.FUNCTION_THROWS != 0 {
		narg++
	}

	printf("extern %s %s(", CType(fi.ReturnType(), TypeNone), symbol)
	if flags&gi.FUNCTION_IS_METHOD != 0 {
		printf("%s", CTypeForInterface(container, TypePointer))
		if narg > 0 {
			printf(", ")
		}
	}

	var closure_scope gi.ScopeType = gi.SCOPE_TYPE_INVALID
	var closure_userdata int = -1
	var closure_destroy int = -1
	var closure_callback int = -1

	for i, n := 0, narg; i < n; i++ {
		if i != 0 {
			printf(", ")
		}

		if i == n-1 && flags&gi.FUNCTION_THROWS != 0 {
			printf("GError**")
			continue
		}

		arg := fi.Arg(i)
		t := arg.Type()

		if uarg := arg.Closure(); uarg != -1 {
			if t.Tag() == gi.TYPE_TAG_INTERFACE {
				if t.Interface().Type() == gi.INFO_TYPE_CALLBACK {
					if darg := arg.Destroy(); darg != -1 {
						closure_destroy = darg
					}
					closure_userdata = uarg
					closure_callback = i
					closure_scope = arg.Scope()
				}
			}
		}

		printf("%s", CType(t, TypeNone))

		switch arg.Direction() {
		case gi.DIRECTION_INOUT, gi.DIRECTION_OUT:
			printf("*")
		}
	}
	printf(");\n")

	if closure_scope == gi.SCOPE_TYPE_INVALID {
		return
	}
	// in case if the function takes callback, generate appropriate wrappers
	// for Go (gc compiler mainly)
	printf("#pragma GCC diagnostic ignored \"-Wunused-function\"\n")
	printf("static %s _%s(", CType(fi.ReturnType(), TypeNone), symbol)
	if flags&gi.FUNCTION_IS_METHOD != 0 {
		printf("%s this", CTypeForInterface(container, TypePointer))
		if narg > 0 {
			printf(", ")
		}
	}

	for i, n := 0, narg; i < n; i++ {
		if i == closure_userdata || i == closure_destroy {
			// skip userdata and destroy func in the wrapper
			continue
		}

		if i != 0 {
			printf(", ")
		}

		if i == closure_callback {
			// replace callback argument with Go function pointer
			// and optional unique id (if scope is not CALL)
			printf("void* gofunc")
			continue
		}

		if i == n-1 && flags&gi.FUNCTION_THROWS != 0 {
			printf("GError** arg%d", i)
			continue
		}

		arg := fi.Arg(i)
		printf("%s", CType(arg.Type(), TypeNone))

		switch arg.Direction() {
		case gi.DIRECTION_INOUT, gi.DIRECTION_OUT:
			printf("*")
		}
		printf(" arg%d", i)
	}
	printf(") {\n")

	// body
	defcall := func(argprint func(i int, t *gi.TypeInfo)) {
		printf("\t\t")
		if ret := fi.ReturnType(); !(ret.Tag() == gi.TYPE_TAG_VOID && !ret.IsPointer()) {
			printf("return ")
		}
		printf("%s(", symbol)
		if flags&gi.FUNCTION_IS_METHOD != 0 {
			printf("this")
			if narg > 0 {
				printf(", ")
			}
		}
		for i, n := 0, narg; i < n; i++ {
			arg := fi.Arg(i)
			t := arg.Type()

			if i != 0 {
				printf(", ")
			}

			argprint(i, t)
		}
		printf(");\n")
	}
	printf("\tif (gofunc) {\n")
	defcall(func(i int, t *gi.TypeInfo) {
		switch i {
		case closure_userdata:
			printf("gofunc")
		case closure_destroy:
			printf("_c_callback_cleanup")
		case closure_callback:
			printf("_%s_c_wrapper", CType(t, TypeNone))
			if closure_scope == gi.SCOPE_TYPE_ASYNC {
				printf("_once")
			}
		default:
			printf("arg%d", i)
		}
	})
	printf("\t} else {\n")
	defcall(func(i int, t *gi.TypeInfo) {
		switch i {
		case closure_userdata, closure_destroy, closure_callback:
			printf("0")
		default:
			printf("arg%d", i)
		}
	})
	printf("\t}\n")
	printf("}\n")
}
Ejemplo n.º 3
0
func (this *binding_generator) c_func_forward_declaration(fi *gi.FunctionInfo) {
	symbol := fi.Symbol()
	if _, declared := this.declared_c_funcs[symbol]; declared {
		return
	}

	this.declared_c_funcs[symbol] = true
	container := fi.Container()
	ph := printer_to(this.out_h)
	pc := printer_to(this.out_c)

	flags := fi.Flags()
	narg := fi.NumArg()
	if flags&gi.FUNCTION_THROWS != 0 {
		narg++
	}

	ph("extern %s %s(", c_type(fi.ReturnType(), type_none), symbol)
	if flags&gi.FUNCTION_IS_METHOD != 0 {
		ph("%s", c_type_for_interface(container, type_pointer))
		if narg > 0 {
			ph(", ")
		}
	}

	var closure_scope gi.ScopeType = gi.SCOPE_TYPE_INVALID
	var closure_userdata int = -1
	var closure_destroy int = -1
	var closure_callback int = -1

	for i, n := 0, narg; i < n; i++ {
		if i != 0 {
			ph(", ")
		}

		if i == n-1 && flags&gi.FUNCTION_THROWS != 0 {
			ph("GError**")
			continue
		}

		arg := fi.Arg(i)
		t := arg.Type()

		if uarg := arg.Closure(); uarg != -1 {
			if t.Tag() == gi.TYPE_TAG_INTERFACE {
				if t.Interface().Type() == gi.INFO_TYPE_CALLBACK {
					if darg := arg.Destroy(); darg != -1 {
						closure_destroy = darg
					}
					closure_userdata = uarg
					closure_callback = i
					closure_scope = arg.Scope()
				}
			}
		}

		ph("%s", c_type(t, type_none))

		switch arg.Direction() {
		case gi.DIRECTION_INOUT, gi.DIRECTION_OUT:
			ph("*")
		}
	}
	ph(");\n")

	if closure_scope == gi.SCOPE_TYPE_INVALID {
		return
	}

	// Also if this function is actually blacklisted, we don't want to
	// generate wrappers
	if config.is_object_blacklisted(gi.ToBaseInfo(fi)) {
		return
	}

	// Or maybe this is a method and method's owner is blacklisted
	if container != nil && config.is_object_blacklisted(container) {
		return
	}

	// in case if the function takes callback, generate appropriate wrappers
	// for Go (gc compiler mainly)
	var tmp bytes.Buffer
	p := printer_to(&tmp)
	p("%s _%s(", c_type(fi.ReturnType(), type_none), symbol)
	if flags&gi.FUNCTION_IS_METHOD != 0 {
		p("%s this", c_type_for_interface(container, type_pointer))
		if narg > 0 {
			p(", ")
		}
	}

	for i, n := 0, narg; i < n; i++ {
		if i == closure_userdata || i == closure_destroy {
			// skip userdata and destroy func in the wrapper
			continue
		}

		if i != 0 {
			p(", ")
		}

		if i == closure_callback {
			// replace callback argument with Go function pointer
			// and optional unique id (if scope is not CALL)
			p("void* gofunc")
			continue
		}

		if i == n-1 && flags&gi.FUNCTION_THROWS != 0 {
			p("GError** arg%d", i)
			continue
		}

		arg := fi.Arg(i)
		p("%s", c_type(arg.Type(), type_none))

		switch arg.Direction() {
		case gi.DIRECTION_INOUT, gi.DIRECTION_OUT:
			p("*")
		}
		p(" arg%d", i)
	}
	p(")")
	ph("extern %s;\n", tmp.String())
	pc("%s {\n", tmp.String())

	// body
	defcall := func(argprint func(i int, t *gi.TypeInfo)) {
		pc("\t\t")
		if ret := fi.ReturnType(); !(ret.Tag() == gi.TYPE_TAG_VOID && !ret.IsPointer()) {
			pc("return ")
		}
		pc("%s(", symbol)
		if flags&gi.FUNCTION_IS_METHOD != 0 {
			pc("this")
			if narg > 0 {
				pc(", ")
			}
		}
		for i, n := 0, narg; i < n; i++ {
			arg := fi.Arg(i)
			t := arg.Type()

			if i != 0 {
				pc(", ")
			}

			argprint(i, t)
		}
		pc(");\n")
	}
	pc("\tif (gofunc) {\n")
	defcall(func(i int, t *gi.TypeInfo) {
		switch i {
		case closure_userdata:
			pc("gofunc")
		case closure_destroy:
			pc("_c_callback_cleanup")
		case closure_callback:
			pc("_%s_c_wrapper", c_type(t, type_none))
			if closure_scope == gi.SCOPE_TYPE_ASYNC {
				pc("_once")
			}
		default:
			pc("arg%d", i)
		}
	})
	pc("\t} else {\n")
	defcall(func(i int, t *gi.TypeInfo) {
		switch i {
		case closure_userdata, closure_destroy, closure_callback:
			pc("0")
		default:
			pc("arg%d", i)
		}
	})
	pc("\t}\n")
	pc("}\n")
}