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// -----------------------------------------------------------------------------
// Project : K7 - Standard Library for V8
// -----------------------------------------------------------------------------
// Author : Sebastien Pierre <sebastien@type-z.org>
// Victor Grishchenko <victor.grishchenko@gmail.com>
// ----------------------------------------------------------------------------
// Creation date : 27-Sep-2008
// Last modification : 19-May-2009
// ----------------------------------------------------------------------------

#ifndef __K7_MACROS__
#define __K7_MACROS__

#include <k7.h>
#include <stdarg.h>

using namespace v8;

// ----------------------------------------------------------------------------
//
// TYPE CONVERSION
//
// ----------------------------------------------------------------------------

/**
* These macros are just shorthand to creat V8/JavaScript values that can be
* passed to the V8 API or returned to the JavaScript environment */
#define JS_CONTEXT v8::Context::GetCurrent()
#define JS_GLOBAL JS_CONTEXT->Global()
#define JS_str(s) v8::String::New(s)
#define JS_str2(s,c) v8::String::New(s,c)
#define JS_int(s) v8::Integer::New(s)
#define JS_undefined v8::Undefined()
#define JS_null v8::Null()
#define JS_fn(f) v8::FunctionTemplate::New(f)->GetFunction()
#define JS_obj(o) v8::Object::New(o)
#define JS_bool(b) v8::Boolean::New(b)

#define JS_THROW(t, s) ThrowException(Exception::t(String::New(s)))
#define JS_ERROR(s) ThrowException(Exception::Error(String::New(s)))

// ----------------------------------------------------------------------------
//
// ARGUMENTS CONVERSION
//
// ----------------------------------------------------------------------------

/**
* This set of macro make it easy to declare a function that can be exported to
* the JavaScript environment.
* See the 'posix.cpp' module for examples. */
#define ARGC args.Length()
#define ARG_COUNT(c) if ( args.Length() != c ) { \
return ThrowException(String::New("Insufficient arguments")); }
#define ARG_BETWEEN(a,b) if ( a <= args.Length() <= b ) {}
#define ARG_int(n,c) int n=(int)(args[c]->Int32Value())
#define ARG_str(v,i) v8::String::AsciiValue v(args[i]);
#define ARG_utf8(v,i) v8::String::Utf8Value v(args[i])
#define ARG_obj(v,i) v8::Local<v8::Object> v=args[i]->ToObject();
#define ARG_obj(v,i) v8::Local<v8::Object> v=args[i]->ToObject();
#define ARG_array(name, c) \
if (!args[(c)]->IsArray()) { \
//std::ostringstream __k7_e; \
            //__k7_e << "Exception: argument error." << __func__ << " expects array for argument " << c << "."; \
//return ThrowException(String::New(__k7_e.str().c_str())); \
} \
Handle<Array> name = Handle<Array>::Cast(args[(c)])
#define ARG_fn(name, c) \
Handle<Function> name = Handle<Function>::Cast(args[(c)])

#define THROW(str) return ThrowException(String::New(str))
#define THROW_VERB(tmpl,...) { char msg[1024]; snprintf(msg,1000,tmpl,__VA_ARGS__); THROW(msg); }
// performance freaks use this THROW_VERB :)
//#define THROW_VERB(tmpl,...) THROW("Invocation error")

#define FUN_NAME (*String::AsciiValue(args.Callee()->GetName()->ToString()))

#define PINT(n) 0; if (args.Length()<++_argn || !args[_argn-1]->IsInt32()) {\
THROW_VERB("Argument %i of %s, must be an integer\n",_argn,FUN_NAME);} \
int n=(int)(args[_argn-1]->Int32Value()); 0
#define PSTR(n) 0; if (args.Length()<++_argn) {\
THROW_VERB("Argument %i of %s must be a string\n",_argn,FUN_NAME);} \
v8::String::AsciiValue n(args[_argn-1]); 0
#define POBJ(n) 0; if (args.Length()<++_argn || !args[_argn-1]->IsObject()) {\
THROW_VERB("Argument %i of %s, must be an object\n",_argn,FUN_NAME);} \
v8::Handle<v8::Object> n (args[_argn-1]->ToObject()); 0
#define PFUN(n) 0; if (args.Length()<++_argn || !args[_argn-1]->IsFunction()) {\
THROW_VERB("Argument %i of %s, must be a function\n",_argn,FUN_NAME);} \
v8::Handle<v8::Function> n (v8::Function::Cast(*args[_argn-1])); 0
#define PWRAP(type,var) 0; if (args.Length()<++_argn || !args[_argn-1]->IsExternal()) {\
THROW_VERB("Argument %i of %s, must be an external\n",_argn,FUN_NAME);} \
type* var = (type*) v8::External::Cast(*args[_argn-1])->Value(); 0

// ----------------------------------------------------------------------------
//
// FUNCTIONS MACROS
//
// ----------------------------------------------------------------------------

#define FUNCTION_DECL(f) static v8::Handle<v8::Value> f(const v8::Arguments&);
#define FUNCTION(f,...) static v8::Handle<v8::Value> f(const v8::Arguments& args) { \
v8::HandleScope handlescope; \
int _argn=0; \
__VA_ARGS__;
#define FUNCTION_C(f) static v8::Handle<v8::Value> f(const v8::Arguments& args) {
#define END }
#define THIS args.This()
#define STUB return ThrowException(Exception::Error(String::New("Stub - Function not implemented")));
#define SET_INTERNAL(ptr) args.This()->SetInternalField(0, External::New((void*)ptr));
#define GET_INTERNAL(type,var) Local<Value> _intfld = args.This()->GetInternalField(0); \
type var = reinterpret_cast<type>(Handle<External>::Cast(_intfld)->Value());
#define RETURN_SCOPED(x) return handlescope.Close(x)
#define RETURN_INT(i) return handlescope.Close(Integer::New(i))
#define RETURN_WRAPPED(ptr) return v8::External::New(ptr)
#define RETURN_UNDEF return JS_undefined
#define RETURN_WATCHED(ptr,f) Persistent<External> watcher = Persistent<External>::New(External::New(ptr)); \
watcher.MakeWeak(ptr, f); \
return watcher;

// ----------------------------------------------------------------------------
//
// OBJECT MACROS
//
// ----------------------------------------------------------------------------

/**
* This set of macros allow you to declare a new object type, usually because
* you want to set internal data in this object.
* See the 'posix.cpp' module for examples. */

#define OBJECT(name,fields,...) \
v8::Handle<Object> name(__VA_ARGS__) { \
v8::HandleScope handle_scope;\
v8::Handle<v8::FunctionTemplate> __class__ = v8::FunctionTemplate::New();\
v8::Handle<v8::ObjectTemplate> __object__ = __class__->InstanceTemplate();\
__object__->SetInternalFieldCount(fields);\
v8::Handle<v8::Object> self = __object__->NewInstance();

#define OBJECT_COPY_SLOTS(from,to) \
{ \
Handle<Array> keys = from->GetPropertyNames(); \
for (int i = 0; i < keys->Length(); i ++) { \
Handle<String> key = keys->Get(JS_int(i))->ToString(); \
Handle<Value> val = from->Get(key); \
to->Set(key, val); \
} \
}

#define OBJECT_SET(o,s,v) o->Set(JS_str(s), v)
#define OBJECT_GET(o,s) o->Get(JS_str(s))
#define OBJECT_UNSET(o,s) o->Set(JS_str(s), JS_undefined)
#define OBJECT_PROTOTYPE(o) o->GetPrototype();


#define INTERNAL(i,value) \
self->SetInternalField(i, v8::External::New((void*)value));

#define EXTERNAL(type,name,object,indice) \
type name = (type) (v8::Local<v8::External>::Cast(object->GetInternalField(indice))->Value());

// ----------------------------------------------------------------------------
//
// CLASS MACROS
//
// ----------------------------------------------------------------------------

#define CLASS(name)\
{ \
v8::Handle<v8::String> __class_name__ = v8::String::New(name); \
v8::Handle<v8::FunctionTemplate> __class__ = v8::FunctionTemplate::New(); \
v8::Handle<v8::ObjectTemplate> __object__ = __class__->InstanceTemplate(); \
v8::Handle<v8::ObjectTemplate> self = __object__; \
__class__->SetClassName(v8::String::New(name));
#define CONSTRUCTOR(c) __class__->SetCallHandler(c);
#define DESTRUCTOR(d) Persistent<Object> _weak_handle = Persistent<Object>::New(__object__); \
_weak_handle.MakeWeak(NULL, d);
#define INTERNAL_FIELDS(i) __object__->SetInternalFieldCount(i);
#define HAS_INTERNAL __object__->SetInternalFieldCount(1);
#define END_CLASS __module__->Set(__class_name__,__class__->GetFunction(),v8::PropertyAttribute(v8::ReadOnly|v8::DontDelete));}

// ----------------------------------------------------------------------------
//
// MODULE MACROS
//
// ----------------------------------------------------------------------------

#define K7_MODULE_CREATOR_T Handle<Object> (*moduleCreator)(Handle<Object> parent, const char* moduleName, const char* fullName)
#define MODULE \
extern "C" v8::Handle<v8::Object> MODULE_STATIC (v8::Handle<v8::Object> __module__) {\
v8::Handle<v8::Object> self = __module__;

#ifdef AS_PLUGIN
#define END_MODULE \
return __module__; } \
extern "C" Handle<Object> k7_module_init (Handle<Object> global, K7_MODULE_CREATOR_T) { \
return MODULE_STATIC(moduleCreator(global, MODULE_NAME, NULL)); \
}
#else
#define END_MODULE \
return __module__; }
#endif

// ----------------------------------------------------------------------------
//
// SCOPE AND BINDING MACROS
//
// ----------------------------------------------------------------------------

#define WITH_CLASS { v8::Handle<v8::Object> self = __class__;
#define WITH_MODULE { v8::Handle<v8::Object> self = __module__;
#define WITH_OBJECT { v8::Handle<v8::Object> self = __object__;

#define SET(s,v) self->Set(JS_str(s),v);
#define SET_int(s,v) self->Set(JS_str(s), JS_int(v));
#define SET_str(s,v) self->Set(JS_str(s), JS_str(v));

#define BIND(s,v) { Handle<Function> f = v8::FunctionTemplate::New(v)->GetFunction(); \
f->SetName(JS_str(s)); \
self->Set(JS_str(s),f); \
}
#define METHOD(s,v) __object__->Set(JS_str(s),v8::FunctionTemplate::New(v)->GetFunction());
#define BIND_CONST(s,v) self->Set(JS_str(s),v);
#define CLASS_METHOD(s,v) __class__->Set(JS_str(s),v8::FunctionTemplate::New(v)->GetFunction());

// ----------------------------------------------------------------------------
//
// API MACROS
//
// ----------------------------------------------------------------------------

/**
* These macros allow to declare a module initialization function and register
* FUNCTIONs in this module. */
#define LINK_TO(lib)
#define IMPORT(function) extern "C" v8::Handle<v8::Object> function(v8::Handle<v8::Object> module);
#define LOAD(moduleName,function) function(k7::module(global, moduleName, NULL));
#define EXEC(source) k7::execute(source);
#define EVAL(source) k7::eval(source);

#endif
// EOF - vim: ts=4 sw=4 et
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