1 /* eval-plural.c - Plural expression evaluation. */
3 /* Copyright (C) 2000-2002, 2006-2009 Free Software Foundation, Inc.
5 This file is part of GNU Bash.
7 Bash is free software: you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation, either version 3 of the License, or
10 (at your option) any later version.
12 Bash is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with Bash. If not, see <http://www.gnu.org/licenses/>.
25 /* Evaluate the plural expression and return an index value. */
26 STATIC unsigned long int plural_eval PARAMS ((struct expression *pexp,
34 struct expression *pexp;
40 switch (pexp->operation)
53 /* pexp->operation must be lnot. */
54 unsigned long int arg = plural_eval (pexp->val.args[0], n);
59 unsigned long int leftarg = plural_eval (pexp->val.args[0], n);
60 if (pexp->operation == lor)
61 return leftarg || plural_eval (pexp->val.args[1], n);
62 else if (pexp->operation == land)
63 return leftarg && plural_eval (pexp->val.args[1], n);
66 unsigned long int rightarg = plural_eval (pexp->val.args[1], n);
68 switch (pexp->operation)
71 return leftarg * rightarg;
73 #if !INTDIV0_RAISES_SIGFPE
77 return leftarg / rightarg;
79 #if !INTDIV0_RAISES_SIGFPE
83 return leftarg % rightarg;
85 return leftarg + rightarg;
87 return leftarg - rightarg;
89 return leftarg < rightarg;
91 return leftarg > rightarg;
93 return leftarg <= rightarg;
94 case greater_or_equal:
95 return leftarg >= rightarg;
97 return leftarg == rightarg;
99 return leftarg != rightarg;
109 /* pexp->operation must be qmop. */
110 unsigned long int boolarg = plural_eval (pexp->val.args[0], n);
111 return plural_eval (pexp->val.args[boolarg ? 1 : 2], n);