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[/] [open8_urisc/] [trunk/] [gnu/] [binutils/] [intl/] [eval-plural.h] - Blame information for rev 36

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/* Plural expression evaluation.
   Copyright (C) 2000-2002 Free Software Foundation, Inc.
 
   This program is free software; you can redistribute it and/or modify it
   under the terms of the GNU Library General Public License as published
   by the Free Software Foundation; either version 2, 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
   Library General Public License for more details.
 
   You should have received a copy of the GNU Library General Public
   License along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301,
   USA.  */
 
#ifndef STATIC
#define STATIC static
#endif
 
/* Evaluate the plural expression and return an index value.  */
STATIC unsigned long int plural_eval PARAMS ((struct expression *pexp,
                                              unsigned long int n))
     internal_function;
 
STATIC
unsigned long int
internal_function
plural_eval (pexp, n)
     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;
}

Line No.	Rev	Author	Line
1	22	khays	`/* Plural expression evaluation.`
2			`Copyright (C) 2000-2002 Free Software Foundation, Inc.`
3
4			`This program is free software; you can redistribute it and/or modify it`
5			`under the terms of the GNU Library General Public License as published`
6			`by the Free Software Foundation; either version 2, or (at your option)`
7			`any later version.`
8
9			`This program is distributed in the hope that it will be useful,`
10			`but WITHOUT ANY WARRANTY; without even the implied warranty of`
11			`MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU`
12			`Library General Public License for more details.`
13
14			`You should have received a copy of the GNU Library General Public`
15			`License along with this program; if not, write to the Free Software`
16			`Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301,`
17			`USA. */`
18
19			`#ifndef STATIC`
20			`#define STATIC static`
21			`#endif`
22
23			`/* Evaluate the plural expression and return an index value. */`
24			`STATIC unsigned long int plural_eval PARAMS ((struct expression *pexp,`
25			`unsigned long int n))`
26			`internal_function;`
27
28			`STATIC`
29			`unsigned long int`
30			`internal_function`
31			`plural_eval (pexp, n)`
32			`struct expression *pexp;`
33			`unsigned long int n;`
34			`{`
35			`switch (pexp->nargs)`
36			`{`
37			`case 0:`
38			`switch (pexp->operation)`
39			`{`
40			`case var:`
41			`return n;`
42			`case num:`
43			`return pexp->val.num;`
44			`default:`
45			`break;`
46			`}`
47			`/* NOTREACHED */`
48			`break;`
49			`case 1:`
50			`{`
51			`/* pexp->operation must be lnot. */`
52			`unsigned long int arg = plural_eval (pexp->val.args[0], n);`
53			`return ! arg;`
54			`}`
55			`case 2:`
56			`{`
57			`unsigned long int leftarg = plural_eval (pexp->val.args[0], n);`
58			`if (pexp->operation == lor)`
59			`return leftarg \|\| plural_eval (pexp->val.args[1], n);`
60			`else if (pexp->operation == land)`
61			`return leftarg && plural_eval (pexp->val.args[1], n);`
62			`else`
63			`{`
64			`unsigned long int rightarg = plural_eval (pexp->val.args[1], n);`
65
66			`switch (pexp->operation)`
67			`{`
68			`case mult:`
69			`return leftarg * rightarg;`
70			`case divide:`
71			`#if !INTDIV0_RAISES_SIGFPE`
72			`if (rightarg == 0)`
73			`raise (SIGFPE);`
74			`#endif`
75			`return leftarg / rightarg;`
76			`case module:`
77			`#if !INTDIV0_RAISES_SIGFPE`
78			`if (rightarg == 0)`
79			`raise (SIGFPE);`
80			`#endif`
81			`return leftarg % rightarg;`
82			`case plus:`
83			`return leftarg + rightarg;`
84			`case minus:`
85			`return leftarg - rightarg;`
86			`case less_than:`
87			`return leftarg < rightarg;`
88			`case greater_than:`
89			`return leftarg > rightarg;`
90			`case less_or_equal:`
91			`return leftarg <= rightarg;`
92			`case greater_or_equal:`
93			`return leftarg >= rightarg;`
94			`case equal:`
95			`return leftarg == rightarg;`
96			`case not_equal:`
97			`return leftarg != rightarg;`
98			`default:`
99			`break;`
100			`}`
101			`}`
102			`/* NOTREACHED */`
103			`break;`
104			`}`
105			`case 3:`
106			`{`
107			`/* pexp->operation must be qmop. */`
108			`unsigned long int boolarg = plural_eval (pexp->val.args[0], n);`
109			`return plural_eval (pexp->val.args[boolarg ? 1 : 2], n);`
110			`}`
111			`}`
112			`/* NOTREACHED */`
113			`return 0;`
114			`}`

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[/] [open8_urisc/] [trunk/] [gnu/] [binutils/] [intl/] [eval-plural.h] - Blame information for rev 36