Naive coding... Post: 302991950

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The Lounge What is on Your Mind? Naive coding... Post 302991950 by wisecracker on Sunday 19th of February 2017 07:42:51 AM

02-19-2017

Registered User

I have this insane distrust of compilers and interpreters.
So I do what could be called naive coding in most langauages that I know well enough because of this distrust.

This is one example of my naive code and IS actually inside AudioScope.sh.

Code:

read -r -p "Set timebase starting point. From 0 to $scan_end<CR> " -e tbinput
# Ensure the timebase values are set to default before changing.
scan_start=0
scan_jump=1
# Eliminate any keyboard error longhand...
# Ensure a NULL string does NOT exist.
if [ "$tbinput" == "" ]
then
	scan_start=0
	tbinput=0
fi
# Find the length of the inputted string and correct for subscript position.
str_len=$(( ${#tbinput} - 1 ))
# Now check for continuous numerical characters ONLY.
for count in $( seq 0 $str_len )
do
	# Reuse variable _number_ to obtain each character per loop.
	number=${tbinput:$count:1}
	# Now convert the character to a decimal number.
	number=$( printf "%d" \'$number )
	# IF ANY ASCII character exists that is not numerical then reset the scan start point.
	if [ $number -le 47 ]
	then
		scan_start=0
		tbinput=0
	fi
	if [ $number -ge 58 ]
	then
		scan_start=0
		tbinput=0
	fi
done

Derivatives of this have never failed under normal conditions on the langauges I have used so it seems idiot proof.
Would professionals like yourselvs consider this puerile coding?
I have no idea if it is possible to have buffer overrun in bash scripting from a 'read', (input), statement.

On searching a few months ago I found this and I do use this method below on small apps to do the same job but I still use longhand derivatives of the above for more serious stuff.
This seems bullet proof but due to my insane distrust of compilers and interpreters I am not sure...

Code:

read -r -p "Enter a number, between 1 and 10:- " -e LIMIT
# Error check!
case $LIMIT in
	''|*[!0-9]*)	LIMIT=10 ;;
esac
# If number is valid check boundaries here...
# More code...

Last edited by wisecracker; 02-19-2017 at 09:17 AM.. Reason: Change LIMIT to 10.

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