Commit | Line | Data |
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b947b1f1 SBS |
1 | #!/bin/bash |
2 | # Desc: Checks if arg is an integer | |
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 | |
34facc2d | 8 | must() { "$@" || die "cannot $*"; } # runs args as command, reports args if command fails |
b947b1f1 SBS |
9 | checkInt() { |
10 | # Desc: Checks if arg is integer | |
11 | # Usage: checkInt arg | |
12 | # Input: arg: integer | |
13 | # Output: - return code 0 (if arg is integer) | |
14 | # - return code 1 (if arg is not integer) | |
15 | # Example: if ! checkInt $arg; then echo "not int"; fi; | |
34facc2d | 16 | # Version: 0.0.2 |
b947b1f1 SBS |
17 | local returnState |
18 | ||
19 | #===Process Arg=== | |
20 | if [[ $# -ne 1 ]]; then | |
21 | die "ERROR:Invalid number of arguments:$#"; | |
22 | fi; | |
23 | ||
24 | RETEST1='^[0-9]+$'; # Regular Expression to test | |
34facc2d | 25 | if [[ ! "$1" =~ $RETEST1 ]] ; then |
b947b1f1 SBS |
26 | returnState="false"; |
27 | else | |
28 | returnState="true"; | |
29 | fi; | |
30 | ||
31 | #===Determine function return code=== | |
32 | if [ "$returnState" = "true" ]; then | |
33 | return 0; | |
34 | else | |
35 | return 1; | |
36 | fi; | |
37 | } # Checks if arg is integer | |
38 | ||
39 | #===END Declare local script functions=== | |
40 | #==END Define script parameters== | |
41 | ||
42 | #==BEGIN test code== | |
43 | if checkInt 4; then yell "success"; fi; | |
44 | sleep 1; | |
45 | if checkInt "foo"; then yell "success"; else yell "fail"; fi; | |
46 | sleep 1; | |
47 | if checkInt "foo" "bar" "baz" 1; then yell "success"; else yell "fail"; fi; | |
48 | sleep 1; | |
49 | if checkInt; then yell "success"; else yell "fail"; fi; | |
50 | #==END test code== | |
51 | ||
52 | # Author: Steven Baltakatei Sandoval | |
53 | # License: GPLv3+ |