summaryrefslogtreecommitdiffstatshomepage
path: root/src/frontend/mame/luaengine.ipp
blob: 16065ae52163f90c30d8341b19cec0214a8e87f2 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
// license:BSD-3-Clause
// copyright-holders:Miodrag Milanovic
/***************************************************************************

    luaengine.ipp

    Controls execution of the core MAME system.

***************************************************************************/
#ifndef MAME_FRONTEND_MAME_LUAENGINE_IPP
#define MAME_FRONTEND_MAME_LUAENGINE_IPP

#include "luaengine.h"

#include "options.h"

#include <lua.hpp>



template <typename T>
struct lua_engine::tag_object_ptr_map
{
	tag_object_ptr_map(T const &m) : map(m) { }

	T const &map;
};


namespace sol {

class buffer
{
public:
	// sol does lua_settop(0), save userdata buffer in registry if necessary
	buffer(int size, lua_State *L)
	{
		ptr = luaL_buffinitsize(L, &buff, size);
		len = size;
		if(buff.b != buff.initb)
		{
			lua_pushvalue(L, -1);
			lua_setfield(L, LUA_REGISTRYINDEX, "sol::buffer_temp");
		}
	}
	~buffer()
	{
		lua_State *L = buff.L;
		if(lua_getfield(L, LUA_REGISTRYINDEX, "sol::buffer_temp") != LUA_TNIL)
		{
			lua_pushnil(L);
			lua_setfield(L, LUA_REGISTRYINDEX, "sol::buffer_temp");
		}
		else
			lua_pop(L, -1);

		luaL_pushresultsize(&buff, len);
	}

	void set_len(int size) { len = size; }
	int get_len() { return len; }
	char *get_ptr() { return ptr; }

private:
	luaL_Buffer buff;
	int len;
	char *ptr;
};


// don't convert core_optons to a table directly
template <> struct is_container<core_options> : std::false_type { };

// buffer customisation
sol::buffer *sol_lua_get(sol::types<buffer *>, lua_State *L, int index, sol::stack::record &tracking);
int sol_lua_push(sol::types<buffer *>, lua_State *L, buffer *value);

// lua_engine::devenum  customisation
template <typename T> struct is_container<lua_engine::devenum<T> > : std::true_type { };
template <typename T> struct usertype_container<lua_engine::devenum<T> >;


// tag_object_ptr_map is_container
template <typename T> struct is_container<lua_engine::tag_object_ptr_map<T> > : std::true_type { };

// tag_object_ptr_map usertype_container
template <typename T>
struct usertype_container<lua_engine::tag_object_ptr_map<T> > : lua_engine::immutable_container_helper<lua_engine::tag_object_ptr_map<T>, T const, typename T::const_iterator>
{
private:
	template <bool Indexed>
	static int next_pairs(lua_State *L)
	{
		typename usertype_container::indexed_iterator &i(stack::unqualified_get<user<typename usertype_container::indexed_iterator> >(L, 1));
		if (i.src.end() == i.it)
			return stack::push(L, lua_nil);
		int result;
		if constexpr (Indexed)
			result = stack::push(L, i.ix + 1);
		else
			result = stack::push(L, i.it->first);
		result += stack::push_reference(L, *i.it->second);
		++i;
		return result;
	}

	template <bool Indexed>
	static int start_pairs(lua_State *L)
	{
		lua_engine::tag_object_ptr_map<T> &self(usertype_container::get_self(L));
		stack::push(L, next_pairs<Indexed>);
		stack::push<user<typename usertype_container::indexed_iterator> >(L, self.map, self.map.begin());
		stack::push(L, lua_nil);
		return 3;
	}

public:
	static int at(lua_State *L)
	{
		lua_engine::tag_object_ptr_map<T> &self(usertype_container::get_self(L));
		std::ptrdiff_t const index(stack::unqualified_get<std::ptrdiff_t>(L, 2));
		if ((0 >= index) || (self.map.size() < index))
			return stack::push(L, lua_nil);
		auto const found(std::next(self.map.begin(), index - 1));
		if (!found->second)
			return stack::push(L, lua_nil);
		else
			return stack::push_reference(L, *found->second);
	}

	static int get(lua_State *L)
	{
		lua_engine::tag_object_ptr_map<T> &self(usertype_container::get_self(L));
		char const *const tag(stack::unqualified_get<char const *>(L));
		auto const found(self.map.find(tag));
		if ((self.map.end() == found) || !found->second)
			return stack::push(L, lua_nil);
		else
			return stack::push_reference(L, *found->second);
	}

	static int index_get(lua_State *L)
	{
		return get(L);
	}

	static int index_of(lua_State *L)
	{
		lua_engine::tag_object_ptr_map<T> &self(usertype_container::get_self(L));
		auto &obj(stack::unqualified_get<decltype(*self.map.begin()->second)>(L, 2));
		auto it(self.map.begin());
		std::ptrdiff_t ix(0);
		while ((self.map.end() != it) && (it->second.get() != &obj))
		{
			++it;
			++ix;
		}
		if (self.map.end() == it)
			return stack::push(L, lua_nil);
		else
			return stack::push(L, ix + 1);
	}

	static int size(lua_State *L)
	{
		lua_engine::tag_object_ptr_map<T> &self(usertype_container::get_self(L));
		return stack::push(L, self.map.size());
	}

	static int empty(lua_State *L)
	{
		lua_engine::tag_object_ptr_map<T> &self(usertype_container::get_self(L));
		return stack::push(L, self.map.empty());
	}

	static int next(lua_State *L) { return stack::push(L, next_pairs<false>); }
	static int pairs(lua_State *L) { return start_pairs<false>(L); }
	static int ipairs(lua_State *L) { return start_pairs<true>(L); }
};


} // namespace sol


// osd_file::error customisation
int sol_lua_push(sol::types<osd_file::error>, lua_State *L, osd_file::error &&value);
template <typename Handler>
bool sol_lua_check(sol::types<osd_file::error>, lua_State *L, int index, Handler &&handler, sol::stack::record &tracking);

// map_handler_type customisation
int sol_lua_push(sol::types<map_handler_type>, lua_State *L, map_handler_type &&value);


template <typename T, typename C, typename I>
struct lua_engine::immutable_container_helper
{
protected:
	using iterator = I;

	static T &get_self(lua_State *L)
	{
		auto p(sol::stack::unqualified_check_get<T *>(L, 1));
		if (!p)
			luaL_error(L, "sol: 'self' is not of type '%s' (pass 'self' as first argument with ':' or call on proper type)", sol::detail::demangle<T>().c_str());
		if (!*p)
			luaL_error(L, "sol: 'self' argument is nil (pass 'self' as first argument with ':' or call on a '%s' type", sol::detail::demangle<T>().c_str());
		return **p;
	}

	struct indexed_iterator
	{
		indexed_iterator(C &s, iterator i) : src(s), it(i), ix(0U) { }

		C &src;
		iterator it;
		std::size_t ix;

		indexed_iterator &operator++()
		{
			++it;
			++ix;
			return *this;
		}
	};

public:
	static int set(lua_State *L)
	{
		return luaL_error(L, "sol: cannot call 'set(key, value)' on type '%s': container is not modifiable", sol::detail::demangle<T>().c_str());
	}

	static int index_set(lua_State *L)
	{
		return luaL_error(L, "sol: cannot call 'container[key] = value' on type '%s': container is not modifiable", sol::detail::demangle<T>().c_str());
	}

	static int add(lua_State *L)
	{
		return luaL_error(L, "sol: cannot call 'add' on type '%s': container is not modifiable", sol::detail::demangle<T>().c_str());
	}

	static int insert(lua_State *L)
	{
		return luaL_error(L, "sol: cannot call 'insert' on type '%s': container is not modifiable", sol::detail::demangle<T>().c_str());
	}

	static int find(lua_State *L)
	{
		return luaL_error(L, "sol: cannot call 'find' on type '%s': no supported comparison operator for the value type", sol::detail::demangle<T>().c_str());
	}

	static int clear(lua_State *L)
	{
		return luaL_error(L, "sol: cannot call 'clear' on type '%s': container is not modifiable", sol::detail::demangle<T>().c_str());
	}

	static int erase(lua_State *L)
	{
		return luaL_error(L, "sol: cannot call 'erase' on type '%s': container is not modifiable", sol::detail::demangle<T>().c_str());
	}
};


struct lua_engine::addr_space
{
	addr_space(address_space &s, device_memory_interface &d) : space(s), dev(d) { }

	template <typename T> T mem_read(offs_t address);
	template <typename T> void mem_write(offs_t address, T val);
	template <typename T> T log_mem_read(offs_t address);
	template <typename T> void log_mem_write(offs_t address, T val);
	template <typename T> T direct_mem_read(offs_t address);
	template <typename T> void direct_mem_write(offs_t address, T val);

	address_space &space;
	device_memory_interface &dev;
};


template <typename T, size_t SIZE>
class lua_engine::enum_parser
{
public:
	constexpr enum_parser(std::initializer_list<std::pair<const char *, T>> values)
	{
		if (values.size() != SIZE)
			throw false && "size template argument incorrectly specified";
		std::copy(values.begin(), values.end(), m_map.begin());
	}

	T operator()(const char *text) const
	{
		auto iter = std::find_if(
			m_map.begin() + 1,
			m_map.end(),
			[text](const auto &x) { return !strcmp(text, x.first); });
		if (iter == m_map.end())
			iter = m_map.begin();
		return iter->second;
	}

	T operator()(const std::string &text) const
	{
		return (*this)(text.c_str());
	}

private:
	std::array<std::pair<const char *, T>, SIZE> m_map;
};


//-------------------------------------------------
//  invoke - invokes a function, wrapping profiler
//-------------------------------------------------

template <typename TFunc, typename... TArgs>
inline sol::protected_function_result lua_engine::invoke(TFunc &&func, TArgs &&... args)
{
	g_profiler.start(PROFILER_LUA);
	sol::protected_function_result result = func(std::forward<TArgs>(args)...);
	g_profiler.stop();
	return result;
}

#endif // MAME_FRONTEND_MAME_LUAENGINE_IPP