Update powerpc libm ULPs
[glibc.git] / intl / plural-exp.h
blob900daa14519524bd872ec2cf0fdb485766a74ba6
1 /* Expression parsing and evaluation for plural form selection.
2 Copyright (C) 2000, 2001, 2002, 2005, 2007 Free Software Foundation, Inc.
3 Written by Ulrich Drepper <drepper@cygnus.com>, 2000.
4 This file is part of the GNU C Library.
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <http://www.gnu.org/licenses/>. */
20 #ifndef _PLURAL_EXP_H
21 #define _PLURAL_EXP_H
23 #ifndef PARAMS
24 # if __STDC__ || defined __GNUC__ || defined __SUNPRO_C || defined __cplusplus || __PROTOTYPES
25 # define PARAMS(args) args
26 # else
27 # define PARAMS(args) ()
28 # endif
29 #endif
31 #ifndef internal_function
32 # define internal_function
33 #endif
35 #ifndef attribute_hidden
36 # define attribute_hidden
37 #endif
40 /* This is the representation of the expressions to determine the
41 plural form. */
42 struct expression
44 int nargs; /* Number of arguments. */
45 enum operator
47 /* Without arguments: */
48 var, /* The variable "n". */
49 num, /* Decimal number. */
50 /* Unary operators: */
51 lnot, /* Logical NOT. */
52 /* Binary operators: */
53 mult, /* Multiplication. */
54 divide, /* Division. */
55 module, /* Modulo operation. */
56 plus, /* Addition. */
57 minus, /* Subtraction. */
58 less_than, /* Comparison. */
59 greater_than, /* Comparison. */
60 less_or_equal, /* Comparison. */
61 greater_or_equal, /* Comparison. */
62 equal, /* Comparison for equality. */
63 not_equal, /* Comparison for inequality. */
64 land, /* Logical AND. */
65 lor, /* Logical OR. */
66 /* Ternary operators: */
67 qmop /* Question mark operator. */
68 } operation;
69 union
71 unsigned long int num; /* Number value for `num'. */
72 struct expression *args[3]; /* Up to three arguments. */
73 } val;
76 /* This is the data structure to pass information to the parser and get
77 the result in a thread-safe way. */
78 struct parse_args
80 const char *cp;
81 struct expression *res;
85 /* Names for the libintl functions are a problem. This source code is used
86 1. in the GNU C Library library,
87 2. in the GNU libintl library,
88 3. in the GNU gettext tools.
89 The function names in each situation must be different, to allow for
90 binary incompatible changes in 'struct expression'. Furthermore,
91 1. in the GNU C Library library, the names have a __ prefix,
92 2.+3. in the GNU libintl library and in the GNU gettext tools, the names
93 must follow ANSI C and not start with __.
94 So we have to distinguish the three cases. */
95 #ifdef _LIBC
96 # define FREE_EXPRESSION __gettext_free_exp
97 # define PLURAL_PARSE __gettextparse
98 # define GERMANIC_PLURAL __gettext_germanic_plural
99 # define EXTRACT_PLURAL_EXPRESSION __gettext_extract_plural
100 #elif defined (IN_LIBINTL)
101 # define FREE_EXPRESSION libintl_gettext_free_exp
102 # define PLURAL_PARSE libintl_gettextparse
103 # define GERMANIC_PLURAL libintl_gettext_germanic_plural
104 # define EXTRACT_PLURAL_EXPRESSION libintl_gettext_extract_plural
105 #else
106 # define FREE_EXPRESSION free_plural_expression
107 # define PLURAL_PARSE parse_plural_expression
108 # define GERMANIC_PLURAL germanic_plural
109 # define EXTRACT_PLURAL_EXPRESSION extract_plural_expression
110 #endif
112 extern void FREE_EXPRESSION PARAMS ((struct expression *exp))
113 internal_function;
114 extern int PLURAL_PARSE PARAMS ((void *arg));
115 extern const struct expression GERMANIC_PLURAL attribute_hidden;
116 extern void EXTRACT_PLURAL_EXPRESSION PARAMS
117 ((const char *nullentry, const struct expression **pluralp,
118 unsigned long int *npluralsp)) internal_function;
120 #if !defined (_LIBC) && !defined (IN_LIBINTL)
121 extern unsigned long int plural_eval PARAMS ((const struct expression *pexp,
122 unsigned long int n));
123 #endif
125 #endif /* _PLURAL_EXP_H */