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1eb63ec2 SBS |
1 | #!/bin/bash |
2 | # Desc: Checks if arg is a float | |
3 | ||
4 | #==BEGIN Define script parameters== | |
5 | #===BEGIN Declare local script functions=== | |
6 | yell() { echo "$0: $*" >&2; } # print script path and all args to stderr | |
7 | die() { yell "$*"; exit 111; } # same as yell() but non-zero exit status | |
8 | try() { "$@" || die "cannot $*"; } # runs args as command, reports args if command fails | |
9 | checkFlt() { | |
10 | # Desc: Checks if arg is a float | |
0201a83d | 11 | # Usage: checkFlt arg |
1eb63ec2 SBS |
12 | # Input: arg: float |
13 | # Output: - return code 0 (if arg is float) | |
14 | # - return code 1 (if arg is not float) | |
0201a83d SBS |
15 | # Example: if ! checkFlt $arg; then echo "not flt"; fi; |
16 | # Version: 0.0.2 | |
1eb63ec2 SBS |
17 | # Depends: yell(), die(), bash 5.0.3 |
18 | # Ref/Attrib: JDB https://stackoverflow.com/a/12643073 float regex | |
19 | local returnState | |
20 | ||
21 | #===Process Arg=== | |
22 | if [[ $# -ne 1 ]]; then | |
23 | die "ERROR:Invalid number of arguments:$#"; | |
24 | fi; | |
25 | ||
26 | RETEST1='^[+-]?([0-9]+([.][0-9]*)?|[.][0-9]+)$'; # Regular Expression to test | |
27 | if [[ ! $1 =~ $RETEST1 ]] ; then | |
28 | returnState="false"; | |
29 | else | |
30 | returnState="true"; | |
31 | fi; | |
32 | ||
33 | #===Determine function return code=== | |
34 | if [ "$returnState" = "true" ]; then | |
35 | return 0; | |
36 | else | |
37 | return 1; | |
38 | fi; | |
0201a83d | 39 | } # Checks if arg is float |
1eb63ec2 SBS |
40 | |
41 | #===END Declare local script functions=== | |
42 | #==END Define script parameters== | |
43 | ||
44 | #==BEGIN test code== | |
45 | myVar1="4" ; echo "Test 1:Should succeed because int is float without decimal places or decimal."; | |
46 | (if checkFlt "$myVar1"; then yell "success"; else yell "fail"; fi;) & sleep 1; | |
47 | ||
48 | myVar1="4.0" ; echo "Test 2:Should succeed because \"4.0\" is a float."; | |
49 | (if checkFlt "$myVar1"; then yell "success"; else yell "fail"; fi;) & sleep 1; | |
50 | ||
51 | myVar1=".0" ; echo "Test 3:Should succeed even if float lack whole numbers left of decimal."; | |
52 | (if checkFlt "$myVar1"; then yell "success"; else yell "fail"; fi;) & sleep 1; | |
53 | ||
54 | myVar1="4." ; echo "Test 4:Should succeed even if float lacks decimal places right of decimal."; | |
55 | (if checkFlt "$myVar1"; then yell "success"; else yell "fail"; fi;) & sleep 1; | |
56 | ||
57 | myVar1="14.0" ; echo "Test 5:Should succeed with multiple whole numbers to left of decimal." | |
58 | (if checkFlt "$myVar1"; then yell "success"; else yell "fail"; fi;) & sleep 1; | |
59 | ||
60 | myVar1="." ; echo "Test 6:Should fail because neither whole numbers nor decimal places are present."; | |
61 | (if checkFlt "$myVar1"; then yell "success"; else yell "fail"; fi;) & sleep 1; | |
62 | ||
63 | myVar1="4"; myVar2="5"; echo "Test 7:Should fail because multiple numbers are provided."; | |
64 | (if checkFlt "$myVar1" "$myVar2"; then yell "success"; else yell "fail"; fi;) & sleep 1; | |
65 | ||
66 | myVar1="4 5"; echo "Test 8:Should fail because multiple numbers are provided."; | |
67 | (if checkFlt "$myVar1"; then yell "success"; else yell "fail"; fi;) & sleep 1; | |
68 | ||
69 | myVar1="4.4.4"; echo "Test 9:Should fail because a float should contain only one decimal."; | |
70 | (if checkFlt "$myVar1"; then yell "success"; else yell "fail"; fi;) & sleep 1; | |
71 | ||
72 | myVar1="foo"; echo "Test 10:Should fail because floats should only contain numbers and decimal characters." | |
73 | (if checkFlt "$myVar1"; then yell "success"; else yell "fail"; fi;) & sleep 1; | |
74 | ||
75 | myVar1="foo"; myVar2="bar"; myVar3="baz"; echo "Test 11: Should fail because multiple arguments provided."; | |
76 | (if checkFlt "$myVar1" "$myVar2" "$myVar3"; then yell "success"; else yell "fail"; fi;) & sleep 1; | |
b2cb5f6a SBS |
77 | |
78 | myVar1=""; echo "Test 12: Should fil because empty string."; | |
79 | (if checkFlt "$myVar1"; then yell "success"; else yell "fail"; fi;) & sleep 1; | |
1eb63ec2 SBS |
80 | #==END test code== |
81 | ||
82 | # Author: Steven Baltakatei Sandoval | |
83 | # License: GPLv3+ |