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
|
#
# Proc UNIQUE
#
# Usage: unique NAME
#
# returns a name which is guaranteed to be unique (when compared to other
# names unique returns) with $name as its prefix. Basically
# it appends 1-N to the end of the string. This is good up to
# the max int value at which point it will wrap around and potentially
# fail.
#
#
# EXTENSIONS:
#
# None
#
#
# RETURNS:
# Normal return value
# Result is a unique string
#
#
# GLOBALS:
# unique_a()
#
# PROCS:
# unique
#
set unique_a(start) 1
proc unique {name} {
global unique_a
switch [catch {set num [set unique_a($name)]}] {
0 { ; # Found a match
incr num
set unique_a($name) $num
return $name$num
}
1 { ; # no match new name
set num 1
set unique_a($name) $num
return $name$num
}
}
return -code error "unknown error in unique"
}
|
