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From: Noel Grandin <noelgrandin@gmail.com>
Subject: Re: [PATCH 02/12] Add =?utf-8?b?cGFyc2VfaW50ZWdlcigp?= (replacement for =?utf-8?b?c2ltcGxlX3N0cnRvKigpKQ==?=
Date: Sun, 10 May 2015 15:52:54 +0000 (UTC)
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> 	int parse_integer(const char *s, unsigned int base, T *val);
> 

I suspect splitting this into 
     parse_signed_int
and
    parse_unsigned_int
(or some other equivalent names)
will make the call-sites a lot easier to read.