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Alternate is_int() and is_float() as one-liners

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Test that argument is not-null and has no leading spaces (which is
otherwise acceptable to printf).  Check for int or float conversion via printf.
Invalid numbers or numbers with trailing spaces cause printf to fail.
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Tom Poindexter 2019-09-23 20:59:54 -06:00 committed by GitHub
parent 460ccfdfd7
commit c3a28101e4
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1 changed files with 2 additions and 10 deletions
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@ -820,12 +820,7 @@ var=$((var2 > var ? var2 : var))
```sh
is_float() {
# Usage: is_float "number"
case $1 in
*.*.*|*[!-.0-9]*) ;;
*[0-9].[0-9]*) return 0
esac
return 1
[ -n "$1" -a "$1" = "${1## }" ] && printf %f "$1" >/dev/null 2>&1
}
```
@ -837,10 +832,7 @@ is_float() {
```sh
is_int() {
# usage: is_int "number"
case $1 in
*[!-0-9]*|'') return 1 ;;
*[0-9]*)
esac
[ -n "$1" -a "$1" = "${1## }" ] && printf %d "$1" >/dev/null 2>&
}
```