1 #include <u.h>
2 #include <libc.h>
3 #include <bio.h>
4 #include <regexp.h>
5 #include "/sys/src/libregexp/regcomp.h"
6 #include "dfa.h"
7
8 #define DUMP
9
10 void
dump(Dreprog * pp)11 dump(Dreprog *pp)
12 {
13 int i, j;
14 Dreinst *l;
15
16 print("start %ld %ld %ld %ld\n",
17 pp->start[0]-pp->inst,
18 pp->start[1]-pp->inst,
19 pp->start[2]-pp->inst,
20 pp->start[3]-pp->inst);
21
22 for(i=0; i<pp->ninst; i++){
23 l = &pp->inst[i];
24 print("%d:", i);
25 for(j=0; j<l->nc; j++){
26 print(" [");
27 if(j == 0)
28 if(l->c[j].start > 1)
29 print("<bad start %d>\n", l->c[j].start);
30 if(j != 0)
31 print("%C%s", l->c[j].start&0xFFFF, (l->c[j].start&0x10000) ? "$" : "");
32 print("-");
33 if(j != l->nc-1)
34 print("%C%s", (l->c[j+1].start&0xFFFF)-1, (l->c[j+1].start&0x10000) ? "$" : "");
35 print("] %ld", l->c[j].next - pp->inst);
36 }
37 if(l->isfinal)
38 print(" final");
39 if(l->isloop)
40 print(" loop");
41 print("\n");
42 }
43 }
44
45
46 void
main(int argc,char ** argv)47 main(int argc, char **argv)
48 {
49 int i;
50 Reprog *p;
51 Dreprog *dp;
52
53 i = 1;
54 p = regcomp(argv[i]);
55 if(p == 0){
56 print("=== %s: bad regexp\n", argv[i]);
57 }
58 // print("=== %s\n", argv[i]);
59 // rdump(p);
60 dp = dregcvt(p);
61 print("=== dfa\n");
62 dump(dp);
63
64 for(i=2; i<argc; i++)
65 print("match %d\n", dregexec(dp, argv[i], 1));
66 exits(0);
67 }
68