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Date: Sat, 3 Aug 2013 17:54:42 +0200
To: gentoo-dev@lists.gentoo.org
Cc: python@gentoo.org
Subject: Re: [gentoo-dev] [New eclass] twisted-r1.eclass
In-Reply-To: <20130803171303.18911eba@gentoo.org>
References: <20130803171303.18911eba@gentoo.org>
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From: Ulrich Mueller <ulm@gentoo.org>
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>>>>> On Sat, 3 Aug 2013, Michał Górny wrote:

> 2. The eclass comes with a pure bash-3.2 CamelCase converter for
> changing PNs like 'twisted-foo' into 'TwistedFoo'. The relevant code
> can be moved to eutils as portable replacements for bash-4 ${foo^}
> and friends.

>		# obtain octal ASCII code for the first letter.
>		local ord=$(printf '%o' "'${fl}")
>
>		# check if it's [a-z]. ASCII codes are locale-safe.
>		if [[ ${ord} -ge 141 && ${ord} -le 172 ]]; then
>			# now substract 040 to make it upper-case.
>			# fun fact: in range 0141..0172, decimal '- 40' is fine.
>			local ord=$(( ${ord} - 40))
>			# and convert it back to the character.
>			fl=$(printf '\'${ord})
>		fi

This looks just horrible. You do decimal arithmetic on octal numbers?

Ulrich