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
|
/* $Id: graph.c,v 1.4 2005/05/04 20:58:38 tom Exp $ */
#include "defs.h"
static void graph_state(int stateno);
static void graph_LA(int ruleno);
static unsigned int larno;
void graph(void)
{
register int i;
register int j;
register shifts *sp;
register int sn;
register int as;
if (!gflag)
return;
for (i = 0; i < nstates; ++i)
{
closure(state_table[i]->items, state_table[i]->nitems);
graph_state(i);
}
fprintf(graph_file, "\n\n");
for (i = 0; i < nstates; ++i)
{
sp = shift_table[i];
if (sp)
for (j = 0; j < sp->nshifts; ++j)
{
sn = sp->shift[j];
as = accessing_symbol[sn];
fprintf(graph_file,
"\tq%d -> q%d [label=\"%s\"];\n",
i, sn, symbol_pname[as]);
}
}
fprintf(graph_file, "}\n");
for (i = 0; i < nsyms; ++i)
FREE(symbol_pname[i]);
FREE(symbol_pname);
}
static void graph_state(int stateno)
{
register short *isp;
register int rule;
register short *sp;
register short *sp1;
larno = lookaheads[stateno];
fprintf(graph_file, "\n\tq%d [label=\"%d:\\l", stateno, stateno);
for (isp = itemset; isp < itemsetend; isp++)
{
sp1 = sp = ritem + *isp;
while (*sp >= 0)
++sp;
rule = -(*sp);
fprintf(graph_file, " %s -> ", symbol_pname[rlhs[rule]]);
for (sp = ritem + rrhs[rule]; sp < sp1; sp++)
fprintf(graph_file, "%s ", symbol_pname[*sp]);
putc('.', graph_file);
while (*sp >= 0)
{
fprintf(graph_file, " %s", symbol_pname[*sp]);
sp++;
}
if (*sp1 < 0)
graph_LA(-*sp1);
fprintf(graph_file, "\\l");
}
fprintf(graph_file, "\"];");
}
static void graph_LA(int ruleno)
{
register int i;
register int tokensetsize;
register unsigned *rowp;
tokensetsize = WORDSIZE(ntokens);
if (ruleno == LAruleno[larno])
{
rowp = LA + larno * tokensetsize;
fprintf(graph_file, " { ");
for (i = ntokens - 1; i >= 0; i--)
{
if (BIT(rowp, i))
fprintf(graph_file, "%s ", symbol_pname[i]);
}
fprintf(graph_file, "}");
++larno;
}
}
|
