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/* eval-plural.c - Plural expression evaluation. */
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/* Copyright (C) 2000-2002, 2006-2009 Free Software Foundation, Inc.
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This file is part of GNU Bash.
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Bash is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Bash is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Bash. If not, see <http://www.gnu.org/licenses/>.
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/* Evaluate the plural expression and return an index value. */
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STATIC unsigned long int plural_eval PARAMS ((struct expression *pexp,
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struct expression *pexp;
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switch (pexp->operation)
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/* pexp->operation must be lnot. */
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unsigned long int arg = plural_eval (pexp->val.args[0], n);
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unsigned long int leftarg = plural_eval (pexp->val.args[0], n);
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if (pexp->operation == lor)
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return leftarg || plural_eval (pexp->val.args[1], n);
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else if (pexp->operation == land)
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return leftarg && plural_eval (pexp->val.args[1], n);
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unsigned long int rightarg = plural_eval (pexp->val.args[1], n);
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switch (pexp->operation)
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return leftarg * rightarg;
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#if !INTDIV0_RAISES_SIGFPE
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return leftarg / rightarg;
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#if !INTDIV0_RAISES_SIGFPE
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return leftarg % rightarg;
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return leftarg + rightarg;
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return leftarg - rightarg;
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return leftarg < rightarg;
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return leftarg > rightarg;
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return leftarg <= rightarg;
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case greater_or_equal:
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return leftarg >= rightarg;
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return leftarg == rightarg;
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return leftarg != rightarg;
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/* pexp->operation must be qmop. */
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unsigned long int boolarg = plural_eval (pexp->val.args[0], n);
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return plural_eval (pexp->val.args[boolarg ? 1 : 2], n);