blob: 4d65031051b0967f917f5faf82284a0166784054 (
plain)
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
|
use std
pkg regex =
type status = union
`Noimpl
`Incomplete
`Unbalanced char
`Emptyparen
`Badrep char
`Badrange byte[:]
`Badescape char
;;
type regex = struct
/* compile state */
debug : bool
trace : bool
pat : byte[:]
idx : std.size
nmatch : std.size
/* VM state */
runq : rethread#
expired : rethread#
expiredtail : rethread#
free : rethread#
nfree : std.size
proglen : std.size
prog : reinst[:]
code : recode[:]
nthr : std.size
str : byte[:]
strp : std.size
nexttid : std.size
/* debug state */
astloc : std.htab(ast#, std.size)#
traces : std.bitset#[:]
pcidx : std.size[:]
lastip : std.size
lastthr : std.size
;;
type ast = union
/* basic string building */
`Alt (ast#, ast#)
`Cat (ast#, ast#)
/* repetition */
`Star (ast#, bool)
`Plus (ast#, bool)
`Quest ast#
/* end matches */
`Chr char
`Ranges char[2][:]
/* meta */
`Cap (std.size, ast#) /* id, ast */
`Bol /* beginning of line */
`Eol /* end of line */
`Bow /* beginning of word */
`Eow /* end of word */
;;
pkglocal type rethread = struct
next : rethread# /* run queue link */
tid : std.size /* just for debugging */
ip : std.size /* the instruction pointer */
dead : bool /* thread died */
matched : bool /* thread matched */
mgroup : std.size[2][16] /* match starts */
;;
pkglocal type recode = uint64
/* can have at most up to 0xf ops */
const OpByte : recode = 0x0
const OpRange : recode = 0x1
const OpLbra : recode = 0x2
const OpRbra : recode = 0x3
const OpBol : recode = 0x4
const OpEol : recode = 0x5
const OpBow : recode = 0x6
const OpEow : recode = 0x7
const OpFork : recode = 0x8
const OpJmp : recode = 0x9
const OpMatch : recode = 0xa
pkglocal type reinst = union
/* direct consumers */
`Ibyte byte
`Irange (byte, byte)
/* groups */
`Ilbra std.size
`Irbra std.size
/* anchors */
`Ibol
`Ieol
`Ibow
`Ieow
/* control flow */
`Ifork (std.size, std.size)
`Ijmp std.size
`Imatch std.size
;;
;;
|
