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
|
// Special variable constants
package ast
import (
"fmt"
)
const (
V_ILLEGAL = iota
V_ARGC
V_CONVFMT
V_FILENAME
V_FNR
V_FS
V_INPUTMODE
V_NF
V_NR
V_OFMT
V_OFS
V_ORS
V_OUTPUTMODE
V_RLENGTH
V_RS
V_RSTART
V_RT
V_SUBSEP
V_LAST = V_SUBSEP
)
var specialVars = map[string]int{
"ARGC": V_ARGC,
"CONVFMT": V_CONVFMT,
"FILENAME": V_FILENAME,
"FNR": V_FNR,
"FS": V_FS,
"INPUTMODE": V_INPUTMODE,
"NF": V_NF,
"NR": V_NR,
"OFMT": V_OFMT,
"OFS": V_OFS,
"ORS": V_ORS,
"OUTPUTMODE": V_OUTPUTMODE,
"RLENGTH": V_RLENGTH,
"RS": V_RS,
"RSTART": V_RSTART,
"RT": V_RT,
"SUBSEP": V_SUBSEP,
}
// SpecialVarIndex returns the "index" of the special variable, or 0
// if it's not a special variable.
func SpecialVarIndex(name string) int {
return specialVars[name]
}
// SpecialVarName returns the name of the special variable by index.
func SpecialVarName(index int) string {
switch index {
case V_ILLEGAL:
return "ILLEGAL"
case V_ARGC:
return "ARGC"
case V_CONVFMT:
return "CONVFMT"
case V_FILENAME:
return "FILENAME"
case V_FNR:
return "FNR"
case V_FS:
return "FS"
case V_INPUTMODE:
return "INPUTMODE"
case V_NF:
return "NF"
case V_NR:
return "NR"
case V_OFMT:
return "OFMT"
case V_OFS:
return "OFS"
case V_ORS:
return "ORS"
case V_OUTPUTMODE:
return "OUTPUTMODE"
case V_RLENGTH:
return "RLENGTH"
case V_RS:
return "RS"
case V_RSTART:
return "RSTART"
case V_RT:
return "RT"
case V_SUBSEP:
return "SUBSEP"
default:
return fmt.Sprintf("<unknown special var %d>", index)
}
}
|
