Date: Sun, 27 Jul 2014 19:23:09 +0200 From: Szabolcs Nagy <nsz@...t70.net> To: musl@...ts.openwall.com Subject: Re: Non-stub gettext API functions committed, ready for testing * Rich Felker <dalias@...c.org> [2014-07-27 12:49:21 -0400]: > On Sun, Jul 27, 2014 at 04:14:18PM +0200, Szabolcs Nagy wrote: > > it shows that a c arithmetic expression parser is needed to handle plurals > > (and the expression has to be evaluated every time dcngettext is invoked) > > Not necessarily. You could cache results. Or (this is likely the more > reasonable implementation) just hard-code the expression strings that > are actually used for real languages and implement them in C when a > match is found. > hardcoding the strings will fail if .mo files are updated to use different expressions with caching the expr has to be evaluated for every uncached n > > Plural-Forms: nplurals=2; plural=n == 1 ? 0 : 1; > > > > The nplurals value must be a decimal number which specifies how many > > different plural forms exist for this language. The string following > > plural is an expression which is using the C language syntax. > > Exceptions are that no negative numbers are allowed, numbers must be > > decimal, and the only variable allowed is n. > > This is a very poor description. Does it allow casts? Compound > literals? Floating point? Function calls? ...? > the parser in gnu gettext: http://git.savannah.gnu.org/cgit/gettext.git/tree/gettext-runtime/intl/plural.y so they implement conditional (?:) logic (&&, ||, !) relational (==, !=, <, >, <=, >=) and arithmetic (+, -, *, /, %) operators with unsigned long args only but in practice the only arithmetic operator used is % and operators are not combined arbitrarily
Powered by blists - more mailing lists
Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.