summaryrefslogtreecommitdiffstatshomepage
path: root/src/emu/mconfig.cpp
blob: e201558f2c977c348bd7ac8bab29e189da287779 (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
// license:BSD-3-Clause
// copyright-holders:Aaron Giles
/***************************************************************************

    mconfig.c

    Machine configuration macros and functions.

***************************************************************************/

#include "emu.h"
#include "emuopts.h"
#include <ctype.h>


//**************************************************************************
//  MACHINE CONFIGURATIONS
//**************************************************************************

//-------------------------------------------------
//  machine_config - constructor
//-------------------------------------------------

machine_config::machine_config(const game_driver &gamedrv, emu_options &options)
	: m_minimum_quantum(attotime::zero),
		m_default_layout(nullptr),
		m_gamedrv(gamedrv),
		m_options(options)
{
	// construct the config
	(*gamedrv.machine_config)(*this, nullptr, nullptr);

	bool is_selected_driver = core_stricmp(gamedrv.name,options.system_name())==0;
	// intialize slot devices - make sure that any required devices have been allocated

	for (device_slot_interface &slot : slot_interface_iterator(root_device()))
	{
		device_t &owner = slot.device();
		std::string selval;
		bool isdefault = (options.priority(owner.tag()+1)==OPTION_PRIORITY_DEFAULT);
		if (is_selected_driver && options.exists(owner.tag()+1))
			selval = options.main_value(owner.tag()+1);
		else if (slot.default_option() != nullptr)
			selval.assign(slot.default_option());

		if (!selval.empty())
		{
			const device_slot_option *option = slot.option(selval.c_str());

			if (option && (isdefault || option->selectable()))
			{
				device_t *new_dev = device_add(&owner, option->name(), option->devtype(), option->clock());

				const char *default_bios = option->default_bios();
				if (default_bios != nullptr)
					device_t::static_set_default_bios_tag(*new_dev, default_bios);

				machine_config_constructor additions = option->machine_config();
				if (additions != nullptr)
					(*additions)(const_cast<machine_config &>(*this), new_dev, new_dev);

				const input_device_default *input_device_defaults = option->input_device_defaults();
				if (input_device_defaults)
					device_t::static_set_input_default(*new_dev, input_device_defaults);
			}
			else
				throw emu_fatalerror("Unknown slot option '%s' in slot '%s'", selval.c_str(), owner.tag()+1);
		}
	}

	// when finished, set the game driver
	driver_device::static_set_game(*m_root_device, gamedrv);

	// then notify all devices that their configuration is complete
	for (device_t &device : device_iterator(root_device()))
		if (!device.configured())
			device.config_complete();
}


//-------------------------------------------------
//  ~machine_config - destructor
//-------------------------------------------------

machine_config::~machine_config()
{
}


//-------------------------------------------------
//  first_screen - return a pointer to the first
//  screen device
//-------------------------------------------------

screen_device *machine_config::first_screen() const
{
	return screen_device_iterator(root_device()).first();
}


//-------------------------------------------------
//  device_add - configuration helper to add a
//  new device
//-------------------------------------------------

device_t *machine_config::device_add(device_t *owner, const char *tag, device_type type, UINT32 clock)
{
	const char *orig_tag = tag;

	// if the device path is absolute, start from the root
	if (tag[0] == ':')
	{
		tag++;
		owner = m_root_device.get();
	}

	// go down the path until we're done with it
	while (strchr(tag, ':'))
	{
		const char *next = strchr(tag, ':');
		assert(next != tag);
		std::string part(tag, next-tag);
		owner = owner->subdevices().find(part);
		if (owner == nullptr)
			throw emu_fatalerror("Could not find %s when looking up path for device %s\n",
									part.c_str(), orig_tag);
		tag = next+1;
	}
	assert(tag[0] != '\0');

	if (owner != nullptr)
	{
		// allocate the new device
		device_t *device = (*type)(*this, tag, owner, clock);

		// append it to the owner's list
		return &config_new_device(owner->subdevices().m_list.append(*device));
	}

	// allocate the root device directly
	assert(m_root_device == nullptr);
	m_root_device.reset((*type)(*this, tag, nullptr, clock));
	return &config_new_device(*m_root_device);
}


//-------------------------------------------------
//  device_replace - configuration helper to
//  replace one device with a new device
//-------------------------------------------------

device_t *machine_config::device_replace(device_t *owner, const char *tag, device_type type, UINT32 clock)
{
	// find the original device by relative tag (must exist)
	assert(owner != nullptr);
	device_t *old_device = owner->subdevice(tag);
	if (old_device == nullptr)
	{
		osd_printf_warning("Warning: attempting to replace non-existent device '%s'\n", tag);
		return device_add(owner, tag, type, clock);
	}

	// make sure we have the old device's actual owner
	owner = old_device->owner();
	assert(owner != nullptr);

	// remove references to the old device
	remove_references(*old_device);

	// allocate the new device
	device_t *new_device = (*type)(*this, tag, owner, clock);

	// substitute it for the old one in the owner's list
	return &config_new_device(owner->subdevices().m_list.replace_and_remove(*new_device, *old_device));
}


//-------------------------------------------------
//  device_remove - configuration helper to
//  remove a device
//-------------------------------------------------

device_t *machine_config::device_remove(device_t *owner, const char *tag)
{
	// find the original device by relative tag (must exist)
	assert(owner != nullptr);
	device_t *device = owner->subdevice(tag);
	if (device == nullptr)
	{
		osd_printf_warning("Warning: attempting to remove non-existent device '%s'\n", tag);
		return nullptr;
	}

	// make sure we have the old device's actual owner
	owner = device->owner();
	assert(owner != nullptr);

	// remove references to the old device
	remove_references(*device);

	// let the device's owner do the work
	owner->subdevices().m_list.remove(*device);
	return nullptr;
}


//-------------------------------------------------
//  device_find - configuration helper to
//  locate a device
//-------------------------------------------------

device_t *machine_config::device_find(device_t *owner, const char *tag)
{
	// find the original device by relative tag (must exist)
	assert(owner != nullptr);
	device_t *device = owner->subdevice(tag);
	assert(device != nullptr);
	if (device == nullptr)
		throw emu_fatalerror("Unable to find device '%s'\n", tag);

	// return the device
	return device;
}


//-------------------------------------------------
//  remove_references - globally remove references
//  to a device about to be removed from the tree
//-------------------------------------------------

void machine_config::remove_references(ATTR_UNUSED device_t &device)
{
	// iterate over all devices and remove any references
	for (device_t &scan : device_iterator(root_device()))
		scan.subdevices().m_tagmap.clear(); //remove(&device);
}


//-------------------------------------------------
//  config_new_device - helper for recursive
//  configuration of newly added devices
//-------------------------------------------------

device_t &machine_config::config_new_device(device_t &device)
{
	// apply any machine configuration owned by the device now
	machine_config_constructor additions = device.machine_config_additions();
	if (additions != nullptr)
		(*additions)(*this, &device, nullptr);

	// return the new device
	return device;
}