166 lines
9.0 KiB
C++
166 lines
9.0 KiB
C++
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//
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// This generator creates a header file that implements automatic
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// wrapper functions for the generic calling convention.
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//
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// Originally implemented by George Yohng from 4Front Technologies in 2009-03-11
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// Modifications by Pierre Fortin in order to add constructor wrapper generation
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//
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// A completely new implementation of automatic wrapper functions was
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// implemented by SiCrane at GameDev.net in 2011-12-18. The generator was
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// adapted from Python to C++ by Andreas.
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//
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// ref: http://www.gamedev.net/topic/617111-more-angelscript-binding-wrappers/
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//
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#include <stdio.h>
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#include <string>
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// Generate templates for up to this number of function parameters
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const int max_args = 4;
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using namespace std;
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void PrintTemplate(const char *base, const char *typeNameList, const char *retType, const char *objType, const char *isConst, const char *newExpr, const char *objExpr, const char *argList1, const char *argList2, const char *wrapName);
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void PrintConstructor(const char *comma, const char *typeNameList, const char *typeList, const char *argList);
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int main()
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{
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printf("#ifndef AS_GEN_WRAPPER_H\n"
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"#define AS_GEN_WRAPPER_H\n"
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"\n"
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"#ifndef ANGELSCRIPT_H\n"
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"// Avoid having to inform include path if header is already include before\n"
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"#include <angelscript.h>\n"
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"#endif\n"
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"#include <new>\n"
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"\n"
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"namespace gw {\n"
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"\n"
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"template <typename T> class Proxy {\n"
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" public:\n"
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" T value;\n"
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" Proxy(T value) : value(value) {}\n"
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" static T cast(void * ptr) {\n"
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" return reinterpret_cast<Proxy<T> *>(&ptr)->value;\n"
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" }\n"
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" private:\n"
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" Proxy(const Proxy &);\n"
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" Proxy & operator=(const Proxy &);\n"
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"};\n"
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"\n"
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"template <typename T> struct Wrapper {};\n"
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"template <typename T> struct ObjFirst {};\n"
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"template <typename T> struct ObjLast {};\n"
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"template <typename T> struct Constructor {};\n"
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"\n"
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"template <typename T>\n"
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"void destroy(AS_NAMESPACE_QUALIFIER asIScriptGeneric * gen) {\n"
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" static_cast<T *>(gen->GetObject())->~T();\n"
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"}\n");
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string typename_list = "typename A0";
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string type_list = "A0";
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string arg_list = "\n static_cast<Proxy <A0> *>(gen->GetAddressOfArg(0))->value";
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string new_exp = "new (gen->GetAddressOfReturnLocation()) Proxy<R>";
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string obj_exp = "static_cast<T *>(gen->GetObject())->*";
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string obj_arg_exp = "\n Proxy<T>::cast(gen->GetObject())";
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PrintTemplate("", "", "void", "", "", "", "", "void", "", "Wrapper");
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PrintTemplate("typename R", "", "R", "", "", new_exp.c_str(), "", "void", "", "Wrapper");
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PrintTemplate("typename T", "", "void", "T::", "", "", obj_exp.c_str(), "void", "", "Wrapper");
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PrintTemplate("typename T, typename R", "", "R", "T::", "", new_exp.c_str(), obj_exp.c_str(), "void", "", "Wrapper");
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PrintTemplate("typename T", "", "void", "T::", " const", "", obj_exp.c_str(), "void", "", "Wrapper");
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PrintTemplate("typename T, typename R", "", "R", "T::", " const", new_exp.c_str(), obj_exp.c_str(), "void", "", "Wrapper");
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PrintTemplate("typename T", "", "void", "", "", "", "", "T", obj_arg_exp.c_str(), "ObjFirst");
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PrintTemplate("typename T, typename R", "", "R", "", "", new_exp.c_str(), "", "T", obj_arg_exp.c_str(), "ObjFirst");
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PrintTemplate("typename T", "", "void", "", "", "", "", "T", obj_arg_exp.c_str(), "ObjLast");
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PrintTemplate("typename T, typename R", "", "R", "", "", new_exp.c_str(), "", "T", obj_arg_exp.c_str(), "ObjLast");
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PrintConstructor("", "", "", "");
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for( int i = 0; i < max_args; i++ )
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{
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PrintTemplate("", typename_list.c_str(), "void", "", "", "", "", type_list.c_str(), arg_list.c_str(), "Wrapper");
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PrintTemplate("typename R, ", typename_list.c_str(), "R", "", "", new_exp.c_str(), "", type_list.c_str(), arg_list.c_str(), "Wrapper");
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PrintTemplate("typename T, ", typename_list.c_str(), "void", "T::", "", "", obj_exp.c_str(), type_list.c_str(), arg_list.c_str(), "Wrapper");
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PrintTemplate("typename T, typename R, ", typename_list.c_str(), "R", "T::", "", new_exp.c_str(), obj_exp.c_str(), type_list.c_str(), arg_list.c_str(), "Wrapper");
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PrintTemplate("typename T, ", typename_list.c_str(), "void", "T::", " const", "", obj_exp.c_str(), type_list.c_str(), arg_list.c_str(), "Wrapper");
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PrintTemplate("typename T, typename R, ", typename_list.c_str(), "R", "T::", " const", new_exp.c_str(), obj_exp.c_str(), type_list.c_str(), arg_list.c_str(), "Wrapper");
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PrintTemplate("typename T, ", typename_list.c_str(), "void", "", "", "", "", ("T, " + type_list).c_str(), (obj_arg_exp + "," + arg_list).c_str(), "ObjFirst");
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PrintTemplate("typename T, typename R, ", typename_list.c_str(), "R", "", "", new_exp.c_str(), "", ("T, " + type_list).c_str(), (obj_arg_exp + "," + arg_list).c_str(), "ObjFirst");
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PrintTemplate("typename T, ", typename_list.c_str(), "void", "", "", "", "", (type_list + ", T").c_str(), (arg_list + "," + obj_arg_exp).c_str(), "ObjLast");
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PrintTemplate("typename T, typename R, ", typename_list.c_str(), "R", "", "", new_exp.c_str(), "", (type_list + ", T").c_str(), (arg_list + "," + obj_arg_exp).c_str(), "ObjLast");
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PrintConstructor(", ", typename_list.c_str(), type_list.c_str(), arg_list.c_str());
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char buf[5];
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sprintf(buf, "%d", i + 1);
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typename_list += ", typename A" + string(buf);
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type_list += ", A" + string(buf);
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arg_list += ",\n static_cast<Proxy <A" + string(buf) + "> *>(gen->GetAddressOfArg(" + string(buf) + "))->value";
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}
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printf("template <typename T>\n"
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"struct Id {\n"
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" template <T fn_ptr> AS_NAMESPACE_QUALIFIER asSFuncPtr f(void) { return asFUNCTION(&Wrapper<T>::template f<fn_ptr>); }\n"
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" template <T fn_ptr> AS_NAMESPACE_QUALIFIER asSFuncPtr of(void) { return asFUNCTION(&ObjFirst<T>::template f<fn_ptr>); }\n"
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" template <T fn_ptr> AS_NAMESPACE_QUALIFIER asSFuncPtr ol(void) { return asFUNCTION(&ObjLast<T>::template f<fn_ptr>); }\n"
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"};\n"
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"\n"
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"template <typename T>\n"
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"Id<T> id(T fn_ptr) { return Id<T>(); }\n"
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"\n"
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"// On some versions of GNUC it is necessary to use the template keyword as disambiguator,\n"
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"// on others the template keyword gives an error, hence the need for the following define.\n"
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"// MSVC on the other hand seems to accept both with or without the template keyword.\n"
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"#if defined(__GNUC__) && (__GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 4))\n"
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" // GNUC 4.4.3 doesn't need the template keyword, and\n"
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" // hopefully upcoming versions won't need it either\n"
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" #define TMPL template\n"
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"#else\n"
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" #define TMPL\n"
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"#endif\n"
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"\n"
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"#define WRAP_FN(name) (::gw::id(name).TMPL f< name >())\n"
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"#define WRAP_MFN(ClassType, name) (::gw::id(&ClassType::name).TMPL f< &ClassType::name >())\n"
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"#define WRAP_OBJ_FIRST(name) (::gw::id(name).TMPL of< name >())\n"
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"#define WRAP_OBJ_LAST(name) (::gw::id(name).TMPL ol< name >())\n"
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"\n"
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"#define WRAP_FN_PR(name, Parameters, ReturnType) asFUNCTION((::gw::Wrapper<ReturnType (*)Parameters>::TMPL f< name >))\n"
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"#define WRAP_MFN_PR(ClassType, name, Parameters, ReturnType) asFUNCTION((::gw::Wrapper<ReturnType (ClassType::*)Parameters>::TMPL f< &ClassType::name >))\n"
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"#define WRAP_OBJ_FIRST_PR(name, Parameters, ReturnType) asFUNCTION((::gw::ObjFirst<ReturnType (*)Parameters>::TMPL f< name >))\n"
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"#define WRAP_OBJ_LAST_PR(name, Parameters, ReturnType) asFUNCTION((::gw::ObjLast<ReturnType (*)Parameters>::TMPL f< name >))\n"
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"\n"
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"#define WRAP_CON(ClassType, Parameters) asFUNCTION((::gw::Constructor<ClassType Parameters>::f))\n"
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"#define WRAP_DES(ClassType) asFUNCTION((::gw::destroy<ClassType>))\n"
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"\n"
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"} // end namespace gw\n"
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"\n"
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"#endif\n");
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return 0;
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}
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void PrintTemplate(const char *base, const char *typeNameList, const char *retType, const char *objType, const char *isConst, const char *newExpr, const char *objExpr, const char *argList1, const char *argList2, const char *wrapName)
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{
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printf("template <%s%s>\n", base, typeNameList);
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printf("struct %s<%s (%s*)(%s)%s> {\n", wrapName, retType, objType, argList1, isConst);
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printf(" template <%s (%s*fp)(%s)%s>\n", retType, objType, argList1, isConst);
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printf(" static void f(AS_NAMESPACE_QUALIFIER asIScriptGeneric * gen) {\n");
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printf(" %s((%sfp)(%s));\n", newExpr, objExpr, argList2);
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printf(" }\n");
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printf("};\n");
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}
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void PrintConstructor(const char *comma, const char *typeNameList, const char *typeList, const char *argList)
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{
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printf("template <typename T%s%s>\n", comma, typeNameList);
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printf("struct Constructor <T (%s)> {\n", typeList);
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printf(" static void f(AS_NAMESPACE_QUALIFIER asIScriptGeneric * gen) {\n");
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printf(" new (gen->GetObject()) T(%s);\n", argList);
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printf(" }\n");
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printf("};\n");
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}
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