382 lines
8.2 KiB
C++
382 lines
8.2 KiB
C++
/*
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** binding-util.h
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**
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** This file is part of mkxp.
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**
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** Copyright (C) 2013 Jonas Kulla <Nyocurio@gmail.com>
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**
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** mkxp is free software: you can redistribute it and/or modify
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** it under the terms of the GNU General Public License as published by
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** the Free Software Foundation, either version 2 of the License, or
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** (at your option) any later version.
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**
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** mkxp is distributed in the hope that it will be useful,
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** but WITHOUT ANY WARRANTY; without even the implied warranty of
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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** GNU General Public License for more details.
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**
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** You should have received a copy of the GNU General Public License
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** along with mkxp. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef BINDING_UTIL_H
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#define BINDING_UTIL_H
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#include <ruby.h>
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#include "exception.h"
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enum RbException
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{
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RGSS = 0,
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PHYSFS,
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SDL,
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MKXP,
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ErrnoENOENT,
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IOError,
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TypeError,
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ArgumentError,
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RbExceptionsMax
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};
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struct RbData
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{
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VALUE exc[RbExceptionsMax];
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/* Input module (RGSS3) */
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VALUE buttoncodeHash;
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RbData();
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~RbData();
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};
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RbData *getRbData();
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struct Exception;
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void
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raiseRbExc(const Exception &exc);
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#define DECL_TYPE(Klass) \
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extern rb_data_type_t Klass##Type
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/* 2.1 has added a new field (flags) to rb_data_type_t */
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#include <ruby/version.h>
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#if RUBY_API_VERSION_MINOR > 0
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/* TODO: can mkxp use RUBY_TYPED_FREE_IMMEDIATELY here? */
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#define DEF_TYPE_FLAGS 0
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#else
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#define DEF_TYPE_FLAGS
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#endif
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#define DEF_TYPE_CUSTOMNAME_AND_FREE(Klass, Name, Free) \
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rb_data_type_t Klass##Type = { \
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Name, { 0, Free, 0, { 0, 0 } }, 0, 0, DEF_TYPE_FLAGS \
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}
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#define DEF_TYPE_CUSTOMFREE(Klass, Free) \
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DEF_TYPE_CUSTOMNAME_AND_FREE(Klass, #Klass, Free)
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#define DEF_TYPE_CUSTOMNAME(Klass, Name) \
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DEF_TYPE_CUSTOMNAME_AND_FREE(Klass, Name, freeInstance<Klass>)
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#define DEF_TYPE(Klass) DEF_TYPE_CUSTOMNAME(Klass, #Klass)
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template<rb_data_type_t *rbType>
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static VALUE classAllocate(VALUE klass)
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{
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return rb_data_typed_object_alloc(klass, 0, rbType);
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}
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template<class C>
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static void freeInstance(void *inst)
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{
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delete static_cast<C*>(inst);
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}
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void
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raiseDisposedAccess(VALUE self);
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template<class C>
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inline C *
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getPrivateData(VALUE self)
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{
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C *c = static_cast<C*>(RTYPEDDATA_DATA(self));
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return c;
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}
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template<class C>
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static inline C *
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getPrivateDataCheck(VALUE self, const rb_data_type_t &type)
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{
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void *obj = Check_TypedStruct(self, &type);
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return static_cast<C*>(obj);
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}
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static inline void
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setPrivateData(VALUE self, void *p)
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{
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RTYPEDDATA_DATA(self) = p;
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}
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inline VALUE
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wrapObject(void *p, const rb_data_type_t &type,
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VALUE underKlass = rb_cObject)
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{
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VALUE klass = rb_const_get(underKlass, rb_intern(type.wrap_struct_name));
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VALUE obj = rb_obj_alloc(klass);
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setPrivateData(obj, p);
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return obj;
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}
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inline VALUE
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wrapProperty(VALUE self, void *prop, const char *iv,
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const rb_data_type_t &type,
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VALUE underKlass = rb_cObject)
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{
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VALUE propObj = wrapObject(prop, type, underKlass);
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rb_iv_set(self, iv, propObj);
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return propObj;
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}
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/* Implemented: oSszfibn| */
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int
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rb_get_args(int argc, VALUE *argv, const char *format, ...);
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/* Always terminate 'rb_get_args' with this */
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#ifndef NDEBUG
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# define RB_ARG_END_VAL ((void*) -1)
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# define RB_ARG_END ,RB_ARG_END_VAL
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#else
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# define RB_ARG_END
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#endif
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typedef VALUE (*RubyMethod)(int argc, VALUE *argv, VALUE self);
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static inline void
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_rb_define_method(VALUE klass, const char *name, RubyMethod func)
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{
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rb_define_method(klass, name, RUBY_METHOD_FUNC(func), -1);
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}
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static inline void
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rb_define_class_method(VALUE klass, const char *name, RubyMethod func)
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{
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rb_define_singleton_method(klass, name, RUBY_METHOD_FUNC(func), -1);
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}
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static inline void
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_rb_define_module_function(VALUE module, const char *name, RubyMethod func)
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{
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rb_define_module_function(module, name, RUBY_METHOD_FUNC(func), -1);
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}
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#define GUARD_EXC(exp) \
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{ try { exp } catch (const Exception &exc) { raiseRbExc(exc); } }
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template<class C>
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static inline VALUE
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objectLoad(int argc, VALUE *argv, VALUE self)
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{
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const char *data;
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int dataLen;
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rb_get_args(argc, argv, "s", &data, &dataLen RB_ARG_END);
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VALUE obj = rb_obj_alloc(self);
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C *c = 0;
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GUARD_EXC( c = C::deserialize(data, dataLen); );
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setPrivateData(obj, c);
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return obj;
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}
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static inline VALUE
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rb_bool_new(bool value)
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{
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return value ? Qtrue : Qfalse;
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}
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inline void
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rb_float_arg(VALUE arg, double *out, int argPos = 0)
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{
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switch (rb_type(arg))
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{
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case RUBY_T_FLOAT :
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*out = RFLOAT_VALUE(arg);
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break;
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case RUBY_T_FIXNUM :
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*out = FIX2INT(arg);
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break;
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default:
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rb_raise(rb_eTypeError, "Argument %d: Expected float", argPos);
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}
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}
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inline void
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rb_int_arg(VALUE arg, int *out, int argPos = 0)
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{
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switch (rb_type(arg))
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{
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case RUBY_T_FLOAT :
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// FIXME check int range?
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*out = NUM2LONG(arg);
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break;
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case RUBY_T_FIXNUM :
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*out = FIX2INT(arg);
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break;
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default:
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rb_raise(rb_eTypeError, "Argument %d: Expected fixnum", argPos);
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}
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}
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inline void
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rb_bool_arg(VALUE arg, bool *out, int argPos = 0)
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{
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switch (rb_type(arg))
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{
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case RUBY_T_TRUE :
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*out = true;
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break;
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case RUBY_T_FALSE :
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case RUBY_T_NIL :
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*out = false;
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break;
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default:
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rb_raise(rb_eTypeError, "Argument %d: Expected bool", argPos);
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}
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}
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inline void
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rb_check_argc(int actual, int expected)
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{
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if (actual != expected)
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rb_raise(rb_eArgError, "wrong number of arguments (%d for %d)",
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actual, expected);
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}
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#define RB_METHOD(name) \
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static VALUE name(int argc, VALUE *argv, VALUE self)
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#define RB_UNUSED_PARAM \
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{ (void) argc; (void) argv; (void) self; }
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#define MARSH_LOAD_FUN(Typ) \
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RB_METHOD(Typ##Load) \
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{ \
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return objectLoad<Typ>(argc, argv, self); \
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}
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#define INITCOPY_FUN(Klass) \
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RB_METHOD(Klass##InitializeCopy) \
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{ \
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VALUE origObj; \
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rb_get_args(argc, argv, "o", &origObj RB_ARG_END); \
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if (!OBJ_INIT_COPY(self, origObj)) /* When would this fail??*/\
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return self; \
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Klass *orig = getPrivateData<Klass>(origObj); \
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Klass *k = 0; \
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GUARD_EXC( k = new Klass(*orig); ) \
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setPrivateData(self, k); \
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return self; \
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}
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/* Object property which is copied by reference, with allowed NIL
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* FIXME: Getter assumes prop is disposable,
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* because self.disposed? is not checked in this case.
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* Should make this more clear */
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#define DEF_PROP_OBJ_REF(Klass, PropKlass, PropName, prop_iv) \
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RB_METHOD(Klass##Get##PropName) \
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{ \
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RB_UNUSED_PARAM; \
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return rb_iv_get(self, prop_iv); \
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} \
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RB_METHOD(Klass##Set##PropName) \
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{ \
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RB_UNUSED_PARAM; \
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rb_check_argc(argc, 1); \
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Klass *k = getPrivateData<Klass>(self); \
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VALUE propObj = *argv; \
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PropKlass *prop; \
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if (NIL_P(propObj)) \
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prop = 0; \
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else \
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prop = getPrivateDataCheck<PropKlass>(propObj, PropKlass##Type); \
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GUARD_EXC( k->set##PropName(prop); ) \
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rb_iv_set(self, prop_iv, propObj); \
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return propObj; \
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}
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/* Object property which is copied by value, not reference */
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#define DEF_PROP_OBJ_VAL(Klass, PropKlass, PropName, prop_iv) \
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RB_METHOD(Klass##Get##PropName) \
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{ \
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RB_UNUSED_PARAM; \
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checkDisposed<Klass>(self); \
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return rb_iv_get(self, prop_iv); \
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} \
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RB_METHOD(Klass##Set##PropName) \
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{ \
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rb_check_argc(argc, 1); \
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Klass *k = getPrivateData<Klass>(self); \
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VALUE propObj = *argv; \
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PropKlass *prop; \
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prop = getPrivateDataCheck<PropKlass>(propObj, PropKlass##Type); \
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GUARD_EXC( k->set##PropName(prop); ) \
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return propObj; \
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}
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#define DEF_PROP(Klass, type, PropName, arg_fun, value_fun) \
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RB_METHOD(Klass##Get##PropName) \
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{ \
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RB_UNUSED_PARAM; \
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Klass *k = getPrivateData<Klass>(self); \
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type value; \
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GUARD_EXC( value = k->get##PropName(); ) \
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return value_fun(value); \
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} \
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RB_METHOD(Klass##Set##PropName) \
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{ \
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rb_check_argc(argc, 1); \
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Klass *k = getPrivateData<Klass>(self); \
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type value; \
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rb_##arg_fun##_arg(*argv, &value); \
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GUARD_EXC( k->set##PropName(value); ) \
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return *argv; \
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}
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#define DEF_PROP_I(Klass, PropName) \
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DEF_PROP(Klass, int, PropName, int, rb_fix_new)
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#define DEF_PROP_F(Klass, PropName) \
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DEF_PROP(Klass, double, PropName, float, rb_float_new)
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#define DEF_PROP_B(Klass, PropName) \
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DEF_PROP(Klass, bool, PropName, bool, rb_bool_new)
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#define INIT_PROP_BIND(Klass, PropName, prop_name_s) \
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{ \
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_rb_define_method(klass, prop_name_s, Klass##Get##PropName); \
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_rb_define_method(klass, prop_name_s "=", Klass##Set##PropName); \
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}
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#endif // BINDING_UTIL_H
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