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author | Lorry Tar Creator <lorry-tar-importer@baserock.org> | 2014-12-24 07:38:37 +0000 |
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committer | <> | 2015-02-02 12:02:29 +0000 |
commit | 482840e61f86ca321838a91e902c41d40c098bbb (patch) | |
tree | 01ea2e242fd2792d19fe192476601587901db794 /gettext-runtime/intl/eval-plural.h | |
download | gettext-tarball-482840e61f86ca321838a91e902c41d40c098bbb.tar.gz |
Imported from /home/lorry/working-area/delta_gettext-tarball/gettext-0.19.4.tar.xz.gettext-0.19.4
Diffstat (limited to 'gettext-runtime/intl/eval-plural.h')
-rw-r--r-- | gettext-runtime/intl/eval-plural.h | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/gettext-runtime/intl/eval-plural.h b/gettext-runtime/intl/eval-plural.h new file mode 100644 index 0000000..924c8c3 --- /dev/null +++ b/gettext-runtime/intl/eval-plural.h @@ -0,0 +1,106 @@ +/* Plural expression evaluation. + Copyright (C) 2000-2003, 2007 Free Software Foundation, Inc. + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. */ + +#ifndef STATIC +#define STATIC static +#endif + +/* Evaluate the plural expression and return an index value. */ +STATIC +unsigned long int +internal_function +plural_eval (const struct expression *pexp, unsigned long int n) +{ + switch (pexp->nargs) + { + case 0: + switch (pexp->operation) + { + case var: + return n; + case num: + return pexp->val.num; + default: + break; + } + /* NOTREACHED */ + break; + case 1: + { + /* pexp->operation must be lnot. */ + unsigned long int arg = plural_eval (pexp->val.args[0], n); + return ! arg; + } + case 2: + { + unsigned long int leftarg = plural_eval (pexp->val.args[0], n); + if (pexp->operation == lor) + return leftarg || plural_eval (pexp->val.args[1], n); + else if (pexp->operation == land) + return leftarg && plural_eval (pexp->val.args[1], n); + else + { + unsigned long int rightarg = plural_eval (pexp->val.args[1], n); + + switch (pexp->operation) + { + case mult: + return leftarg * rightarg; + case divide: +#if !INTDIV0_RAISES_SIGFPE + if (rightarg == 0) + raise (SIGFPE); +#endif + return leftarg / rightarg; + case module: +#if !INTDIV0_RAISES_SIGFPE + if (rightarg == 0) + raise (SIGFPE); +#endif + return leftarg % rightarg; + case plus: + return leftarg + rightarg; + case minus: + return leftarg - rightarg; + case less_than: + return leftarg < rightarg; + case greater_than: + return leftarg > rightarg; + case less_or_equal: + return leftarg <= rightarg; + case greater_or_equal: + return leftarg >= rightarg; + case equal: + return leftarg == rightarg; + case not_equal: + return leftarg != rightarg; + default: + break; + } + } + /* NOTREACHED */ + break; + } + case 3: + { + /* pexp->operation must be qmop. */ + unsigned long int boolarg = plural_eval (pexp->val.args[0], n); + return plural_eval (pexp->val.args[boolarg ? 1 : 2], n); + } + } + /* NOTREACHED */ + return 0; +} |