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
|
use std
use bio
use regex
const main = {args
var cmd, comp
var verbose
var fd
verbose = false
cmd = std.optparse(args, &[
.argdesc = "regex [inputs...]",
.minargs = 1,
.maxargs = 1,
.opts = [
[.opt='v', .desc="dump verbose regex output"]
][:],
])
for opt : cmd.opts
match opt
| ('v', _): verbose = true
| _: std.fatal("Unknown argument")
;;
;;
if verbose
comp = regex.dbgcompile(cmd.args[0], true)
else
comp = regex.dbgcompile(cmd.args[0], false)
;;
match comp
| `std.Err m:
std.fatal("unable to compile regex: {}\n", m)
| `std.Ok re:
if cmd.args.len > 1
runall(re, cmd.args)
else
fd = bio.mkfile(0, bio.Rd)
dump(re, fd)
bio.close(fd)
;;
;;
}
const runall = {re, files
for f : files
match bio.open(f, bio.Rd)
| `std.Ok fd:
dump(re, fd)
bio.close(fd)
| `std.Err m:
std.fatal("failed to open {}: {}\n", f, m)
;;
;;
}
const dump = {re, fd
while true
match bio.readln(fd)
| `bio.Ok ln:
show(re, ln, regex.exec(re, ln))
std.slfree(ln)
| `bio.Eof:
break
| `bio.Err e:
std.put("error reading from input: {}", e)
break
;;
;;
}
const show = {re, ln, mg
match mg
| `std.Some rl:
std.put("Matched: {}\n", rl[0])
for var i = 1; i < rl.len; i++
std.put("\tgroup {}: {}\n", i, rl[i])
;;
std.put("coverage:\n")
std.put("\t{}\n", re.pat)
showcoverage(re)
| `std.None:
std.put("Match failed at {}:\n", re.lastip)
std.put("\t{}\n", re.pat)
caret(re, re.pcidx[re.lastip])
std.put("\t{}\n", ln)
caret(re, re.strp - 1)
;;
}
const caret = {re, idx
std.put("\t")
for var i = 0; i < idx; i++
std.put("~")
;;
std.put("^\n")
}
const showcoverage = {re
var hit
var idx
hit = std.slzalloc(re.pat.len)
for var ip = 0; ip < re.proglen; ip++
if !std.bshas(re.traces[re.lastthr], ip)
continue
;;
idx = re.pcidx[ip]
if idx >= 0 && idx < hit.len
hit[idx] = true
;;
;;
std.put("\t")
for h : hit
if h
std.put("^")
else
std.put(" ")
;;
;;
std.put("\n")
}
|
