SwigType *SwigType_pop_function(SwigType *t) {
SwigType *f = 0;
SwigType *g = 0;
char *c = Char(t);
if (strncmp(c, "q(", 2) == 0) {
f = SwigType_pop(t);
c = Char(t);
}
if (strncmp(c, "f(", 2)) {
printf("Fatal error. SwigType_pop_function applied to non-function.\n");
abort();
}
g = SwigType_pop(t);
if (f)
SwigType_push(g, f);
Delete(f);
return g;
}
int Swig_MethodToFunction(Node *n, String *classname, int flags, SwigType *director_type, int is_director) {
String *name, *qualifier;
ParmList *parms;
SwigType *type;
Parm *p;
String *self = 0;
/* If smart pointer, change self dereferencing */
if (flags & CWRAP_SMART_POINTER) {
self = NewString("(*this)->");
}
/* If node is a member template expansion, we don't allow added code */
if (Getattr(n, k_templatetype))
flags &= ~(CWRAP_EXTEND);
name = Getattr(n, k_name);
qualifier = Getattr(n, k_qualifier);
parms = CopyParmList(nonvoid_parms(Getattr(n, k_parms)));
type = NewString(classname);
if (qualifier) {
SwigType_push(type, qualifier);
}
SwigType_add_pointer(type);
p = NewParm(type, k_self);
Setattr(p, k_self, "1");
Setattr(p, k_hidden, "1");
/*
Disable the 'this' ownership in 'self' to manage inplace
operations like:
A& A::operator+=(int i) { ...; return *this;}
Here the 'self' parameter ownership needs to be disabled since
there could be two objects sharing the same 'this' pointer: the
input and the result one. And worse, the pointer could be deleted
in one of the objects (input), leaving the other (output) with
just a seg. fault to happen.
To avoid the previous problem, use
%feature("self:disown") *::operator+=;
%feature("new") *::operator+=;
These two lines just transfer the ownership of the 'this' pointer
from the input to the output wrapping object.
This happens in python, but may also happens in other target
languages.
*/
if (GetFlag(n, "feature:self:disown")) {
Setattr(p, k_wrapdisown, "1");
}
set_nextSibling(p, parms);
Delete(type);
/* Generate action code for the access */
if (!(flags & CWRAP_EXTEND)) {
String *explicit_qualifier = 0;
String *call = 0;
String *cres = 0;
String *explicitcall_name = 0;
int pure_virtual = !(Cmp(Getattr(n, k_storage), "virtual")) && !(Cmp(Getattr(n, k_value), "0"));
/* Call the explicit method rather than allow for a polymorphic call */
if ((flags & CWRAP_DIRECTOR_TWO_CALLS) || (flags & CWRAP_DIRECTOR_ONE_CALL)) {
String *access = Getattr(n, "access");
if (access && (Cmp(access, "protected") == 0)) {
/* If protected access (can only be if a director method) then call the extra public accessor method (language module must provide this) */
String *explicit_qualifier_tmp = SwigType_namestr(Getattr(Getattr(parentNode(n), "typescope"), k_qname));
explicitcall_name = NewStringf("%sSwigPublic", name);
explicit_qualifier = NewStringf("SwigDirector_%s", explicit_qualifier_tmp);
Delete(explicit_qualifier_tmp);
} else {
explicit_qualifier = SwigType_namestr(Getattr(Getattr(parentNode(n), "typescope"), k_qname));
}
}
call = Swig_cmethod_call(explicitcall_name ? explicitcall_name : name, p, self, explicit_qualifier, director_type);
cres = Swig_cresult(Getattr(n, k_type), k_result, call);
if (pure_virtual && is_director && (flags & CWRAP_DIRECTOR_TWO_CALLS)) {
String *qualifier = SwigType_namestr(Getattr(Getattr(parentNode(n), "typescope"), k_qname));
Delete(cres);
cres = NewStringf("Swig::DirectorPureVirtualException::raise(\"%s::%s\");", qualifier, name);
Delete(qualifier);
}
if (flags & CWRAP_DIRECTOR_TWO_CALLS) {
/* Create two method calls, one to call the explicit method, the other a normal polymorphic function call */
String *cres_both_calls = NewStringf("");
String *call_extra = Swig_cmethod_call(name, p, self, 0, director_type);
String *cres_extra = Swig_cresult(Getattr(n, k_type), k_result, call_extra);
Printv(cres_both_calls, "if (upcall) {\n", cres, "\n", "} else {", cres_extra, "\n}", NIL);
Setattr(n, k_wrapaction, cres_both_calls);
Delete(cres_extra);
Delete(call_extra);
Delete(cres_both_calls);
} else {
Setattr(n, k_wrapaction, cres);
}
Delete(explicitcall_name);
Delete(call);
Delete(cres);
Delete(explicit_qualifier);
} else {
/* Methods with default arguments are wrapped with additional methods for each default argument,
* however, only one extra %extend method is generated. */
String *defaultargs = Getattr(n, k_defaultargs);
String *code = Getattr(n, k_code);
String *cname = Getattr(n, k_classname) ? Getattr(n, k_classname) : classname;
String *membername = Swig_name_member(cname, name);
String *mangled = Swig_name_mangle(membername);
int is_smart_pointer = flags & CWRAP_SMART_POINTER;
type = Getattr(n, k_type);
/* Check if the method is overloaded. If so, and it has code attached, we append an extra suffix
to avoid a name-clash in the generated wrappers. This allows overloaded methods to be defined
in C. */
if (Getattr(n, k_symoverloaded) && code) {
Append(mangled, Getattr(defaultargs ? defaultargs : n, k_symovername));
}
/* See if there is any code that we need to emit */
if (!defaultargs && code && !is_smart_pointer) {
Swig_add_extension_code(n, mangled, p, type, code, cparse_cplusplus, k_self);
}
if (is_smart_pointer) {
int i = 0;
Parm *pp = p;
String *func = NewStringf("%s(", mangled);
String *cres;
if (Cmp(Getattr(n, k_storage), k_static) != 0) {
String *pname = Swig_cparm_name(pp, i);
String *ctname = SwigType_namestr(cname);
String *fadd = NewStringf("(%s*)(%s)->operator ->()", ctname, pname);
Append(func, fadd);
Delete(ctname);
Delete(fadd);
Delete(pname);
pp = nextSibling(pp);
if (pp)
Append(func, ",");
} else {
pp = nextSibling(pp);
}
++i;
while (pp) {
SwigType *pt = Getattr(pp, k_type);
if ((SwigType_type(pt) != T_VOID)) {
String *pname = Swig_cparm_name(pp, i++);
String *rcaststr = SwigType_rcaststr(pt, pname);
Append(func, rcaststr);
Delete(rcaststr);
Delete(pname);
pp = nextSibling(pp);
if (pp)
Append(func, ",");
}
}
Append(func, ")");
cres = Swig_cresult(Getattr(n, k_type), k_result, func);
Setattr(n, k_wrapaction, cres);
Delete(cres);
} else {
String *call = Swig_cfunction_call(mangled, p);
String *cres = Swig_cresult(Getattr(n, k_type), k_result, call);
Setattr(n, k_wrapaction, cres);
Delete(call);
Delete(cres);
}
Delete(membername);
Delete(mangled);
}
Setattr(n, k_parms, p);
Delete(p);
Delete(self);
Delete(parms);
return SWIG_OK;
}
int
Swig_MethodToFunction(Node *n, String *classname, int flags) {
String *name, *qualifier;
ParmList *parms;
SwigType *type;
Parm *p;
String *self = 0;
/* If smart pointer, change self derefencing */
if (flags & CWRAP_SMART_POINTER) {
self = NewString("(*this)->");
}
/* If node is a member template expansion, we don't allow added code */
if (Getattr(n,"templatetype")) flags &= ~(CWRAP_EXTEND);
name = Getattr(n,"name");
qualifier = Getattr(n,"qualifier");
parms = CopyParmList(nonvoid_parms(Getattr(n,"parms")));
type = NewString(classname);
if (qualifier) {
SwigType_push(type,qualifier);
}
SwigType_add_pointer(type);
p = NewParm(type,"self");
Setattr(p,"hidden","1");
set_nextSibling(p,parms);
Delete(type);
/* Generate action code for the access */
if (!(flags & CWRAP_EXTEND)) {
Setattr(n,"wrap:action", Swig_cresult(Getattr(n,"type"),"result", Swig_cmethod_call(name,p,self)));
} else {
String *code;
String *mangled;
String *membername = Swig_name_member(classname, name);
mangled = Swig_name_mangle(membername);
code = Getattr(n,"code");
type = Getattr(n,"type");
/* Check if the method is overloaded. If so, and it has code attached, we append an extra suffix
to avoid a name-clash in the generated wrappers. This allows overloaded methods to be defined
in C. */
if (Getattr(n,"sym:overloaded") && code) {
Append(mangled,Getattr(n,"sym:overname"));
}
Setattr(n,"wrap:action", Swig_cresult(Getattr(n,"type"),"result", Swig_cfunction_call(mangled,p)));
/* See if there is any code that we need to emit */
if (code) {
String *body;
String *tmp = NewStringf("%s(%s)", mangled, ParmList_str(p));
body = SwigType_str(type,tmp);
Delete(tmp);
Printv(body,code,"\n",NIL);
Setattr(n,"wrap:code",body);
}
Delete(membername);
Delete(mangled);
}
Setattr(n,"parms",p);
Delete(p);
Delete(self);
return SWIG_OK;
}
