]>
Commit | Line | Data |
---|---|---|
0555fcce | 1 | /* Expression parsing and evaluation for plural form selection. |
701666b7 | 2 | Copyright (C) 2000, 2001, 2002, 2005, 2007 Free Software Foundation, Inc. |
0555fcce UD |
3 | Written by Ulrich Drepper <drepper@cygnus.com>, 2000. |
4 | This file is part of the GNU C Library. | |
5 | ||
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. | |
10 | ||
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. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public | |
59ba27a6 PE |
17 | License along with the GNU C Library; if not, see |
18 | <http://www.gnu.org/licenses/>. */ | |
0555fcce UD |
19 | |
20 | #ifndef _PLURAL_EXP_H | |
21 | #define _PLURAL_EXP_H | |
22 | ||
23 | #ifndef PARAMS | |
0f131646 | 24 | # if __STDC__ || defined __GNUC__ || defined __SUNPRO_C || defined __cplusplus || __PROTOTYPES |
0555fcce UD |
25 | # define PARAMS(args) args |
26 | # else | |
27 | # define PARAMS(args) () | |
28 | # endif | |
29 | #endif | |
30 | ||
31 | #ifndef internal_function | |
32 | # define internal_function | |
33 | #endif | |
34 | ||
0f131646 RM |
35 | #ifndef attribute_hidden |
36 | # define attribute_hidden | |
37 | #endif | |
38 | ||
0555fcce UD |
39 | |
40 | /* This is the representation of the expressions to determine the | |
41 | plural form. */ | |
42 | struct expression | |
43 | { | |
44 | int nargs; /* Number of arguments. */ | |
45 | enum operator | |
46 | { | |
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 | |
70 | { | |
71 | unsigned long int num; /* Number value for `num'. */ | |
72 | struct expression *args[3]; /* Up to three arguments. */ | |
73 | } val; | |
74 | }; | |
75 | ||
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 | |
79 | { | |
80 | const char *cp; | |
81 | struct expression *res; | |
82 | }; | |
83 | ||
84 | ||
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) | |
0f131646 RM |
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 | |
0555fcce UD |
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 | |
111 | ||
112 | extern void FREE_EXPRESSION PARAMS ((struct expression *exp)) | |
113 | internal_function; | |
114 | extern int PLURAL_PARSE PARAMS ((void *arg)); | |
72005a5d | 115 | extern const struct expression GERMANIC_PLURAL attribute_hidden; |
701666b7 UD |
116 | extern void EXTRACT_PLURAL_EXPRESSION PARAMS |
117 | ((const char *nullentry, const struct expression **pluralp, | |
118 | unsigned long int *npluralsp)) internal_function; | |
0555fcce | 119 | |
0f131646 | 120 | #if !defined (_LIBC) && !defined (IN_LIBINTL) |
701666b7 | 121 | extern unsigned long int plural_eval PARAMS ((const struct expression *pexp, |
0f131646 RM |
122 | unsigned long int n)); |
123 | #endif | |
124 | ||
0555fcce | 125 | #endif /* _PLURAL_EXP_H */ |