summaryrefslogtreecommitdiffstatshomepage
path: root/src/emu/netlist/nl_parser.c
blob: 42ccbda80b26f519a1d9ae0d2f10751740d592b5 (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
// license:GPL-2.0+
// copyright-holders:Couriersud
/*
 * nl_parser.c
 *
 */

#include "nl_parser.h"

//#undef NL_VERBOSE_OUT
//#define NL_VERBOSE_OUT(x) printf x

// ----------------------------------------------------------------------------------------
// A netlist parser
// ----------------------------------------------------------------------------------------

void netlist_parser::parse(const char *buf)
{
	m_px = buf;

	while (!eof())
	{
		pstring n;
		skipws();
		if (eof()) break;
		n = getname('(');
		NL_VERBOSE_OUT(("Parser: Device: %s\n", n.cstr()));
		if (n == "NET_ALIAS")
			net_alias();
        else if (n == "NET_C")
            net_c();
		else if (n == "NETDEV_PARAM")
			netdev_param();
        else if (n == "NETDEV_R")
            netdev_device(n, "R");
        else if (n == "NETDEV_C")
            netdev_device(n, "C");
        else if (n == "NETDEV_POT")
            netdev_device(n, "R");
        else if (n == "NETDEV_D")
            netdev_device(n, "model", true);
		else if ((n == "NETDEV_TTL_CONST") || (n == "NETDEV_ANALOG_CONST"))
			netdev_const(n);
		else
			netdev_device(n);
	}
}

void netlist_parser::net_alias()
{
	pstring alias;
	pstring out;
	skipws();
	alias = getname(',');
	skipws();
	out = getname(')');
	NL_VERBOSE_OUT(("Parser: Alias: %s %s\n", alias.cstr(), out.cstr()));
	m_setup.register_alias(alias, out);
}

void netlist_parser::net_c()
{
    pstring t1;
    pstring t2;
    skipws();
    t1 = getname(',');
    skipws();
    t2 = getname(')');
    NL_VERBOSE_OUT(("Parser: Connect: %s %s\n", t1.cstr(), t2.cstr()));
    m_setup.register_link(t1 , t2);
}

void netlist_parser::netdev_param()
{
	pstring param;
	double val;
	skipws();
	param = getname(',');
	skipws();
	val = eval_param();
	NL_VERBOSE_OUT(("Parser: Param: %s %f\n", param.cstr(), val));
	m_setup.register_param(param, val);
	check_char(')');
}

void netlist_parser::netdev_const(const pstring &dev_name)
{
	pstring name;
	netlist_device_t *dev;
	pstring paramfq;
	double val;

	skipws();
	name = getname(',');
	dev = m_setup.factory().new_device_by_name(dev_name, m_setup);
	m_setup.register_dev(dev, name);
	skipws();
	val = eval_param();
	paramfq = name + ".CONST";
	NL_VERBOSE_OUT(("Parser: Const: %s %f\n", name.cstr(), val));
    check_char(')');
	m_setup.register_param(paramfq, val);
}

void netlist_parser::netdev_device(const pstring &dev_type)
{
	pstring devname;
	netlist_device_t *dev;
	int cnt;

	skipws();
	devname = getname2(',', ')');
	dev = m_setup.factory().new_device_by_name(dev_type, m_setup);
	m_setup.register_dev(dev, devname);
	NL_VERBOSE_OUT(("Parser: IC: %s\n", devname.cstr()));
	cnt = 0;
	while (getc() != ')')
	{
		skipws();
		pstring output_name = getname2(',', ')');
		pstring alias = pstring::sprintf("%s.[%d]", devname.cstr(), cnt);
		NL_VERBOSE_OUT(("Parser: ID: %s %s\n", output_name.cstr(), alias.cstr()));
		m_setup.register_link(alias, output_name);
		skipws();
		cnt++;
	}
/*
    if (cnt != dev->m_terminals.count() && !dev->variable_input_count())
		fatalerror("netlist: input count mismatch for %s - expected %d found %d\n", devname.cstr(), dev->m_terminals.count(), cnt);
	if (dev->variable_input_count())
	{
		NL_VERBOSE_OUT(("variable inputs %s: %d\n", dev->name().cstr(), cnt));
	}
	*/
}

void netlist_parser::netdev_device(const pstring &dev_type, const pstring &default_param, bool isString)
{
    netlist_device_t *dev;

    skipws();
    pstring devname = getname2(',', ')');
    pstring defparam = devname + "." + default_param;
    dev = m_setup.factory().new_device_by_name(dev_type, m_setup);
    m_setup.register_dev(dev, devname);
    NL_VERBOSE_OUT(("Parser: IC: %s\n", devname.cstr()));
    if (getc() != ')')
    {
        // have a default param
        skipws();
        if (isString)
        {
            pstring val = getname(')');
            ungetc();
            NL_VERBOSE_OUT(("Parser: Default param: %s %s\n", defparam.cstr(), val.cstr()));
            m_setup.register_param(defparam, val);
        }
        else
        {
            double val = eval_param();
            NL_VERBOSE_OUT(("Parser: Default param: %s %f\n", defparam.cstr(), val));
            m_setup.register_param(defparam, val);
        }
    }
    check_char(')');
}

// ----------------------------------------------------------------------------------------
// private
// ----------------------------------------------------------------------------------------

void netlist_parser::skipeol()
{
    char c = getc();
	while (c)
	{
		if (c == 10)
		{
			c = getc();
			if (c != 13)
				ungetc();
			return;
		}
		c = getc();
	}
}

void netlist_parser::skipws()
{
	while (unsigned char c = getc())
	{
		switch (c)
		{
		case ' ':
		case 9:
		case 10:
		case 13:
			break;
		case '/':
		    c = getc();
			if (c == '/')
			{
                skipeol();
			}
			else if (c == '*')
			{
			    int f=0;
			    while ((c = getc()) != 0 )
			    {
			        if (f == 0 && c == '*')
			            f=1;
			        else if (f == 1 && c== '/' )
			            break;
			        else
			            f=0;
			    }
			}
			break;
		default:
		    ungetc();
			return;
		}
	}
}

pstring netlist_parser::getname(char sep)
{
	char buf[300];
	char *p1 = buf;
	char c;

	while ((c=getc()) != sep)
		*p1++ = c;
	*p1 = 0;
	return pstring(buf);
}

pstring netlist_parser::getname2(char sep1, char sep2)
{
	char buf[300];
	char *p1 = buf;
	char c=getc();

	while ((c != sep1) && (c != sep2))
	{
        *p1++ = c;
        c = getc();
	}
	*p1 = 0;
	ungetc();
	return pstring(buf);
}

void netlist_parser::check_char(char ctocheck)
{
	skipws();
	char c = getc();
	if ( c == ctocheck)
	{
		return;
	}
	m_setup.netlist().xfatalerror("Parser: expected '%c' found '%c'\n", ctocheck, c);
}

double netlist_parser::eval_param()
{
	static const char *macs[6] = {"", "RES_K(", "RES_M(", "CAP_U(", "CAP_N(", "CAP_P("};
	static double facs[6] = {1, 1e3, 1e6, 1e-6, 1e-9, 1e-12};
	int i;
	int f=0;
	bool e;
	double ret;

	pstring s = getname2(')',',');

	for (i=1; i<6;i++)
		if (strncmp(s.cstr(), macs[i], strlen(macs[i])) == 0)
			f = i;
	ret = s.substr(strlen(macs[f])).as_double(&e);
	if ((f>0) && e)
	    m_setup.netlist().xfatalerror("Parser: Error with parameter ...\n");
    if (f>0)
        check_char(')');
	return ret * facs[f];
}

unsigned char netlist_parser::getc()
{
    if (*m_px)
        return *(m_px++);
    else
        return *m_px;
}

void netlist_parser::ungetc()
{
    m_px--;
}