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0555fcce | 1 | /* Expression parsing and evaluation for plural form selection. |
bfff8b1b | 2 | Copyright (C) 2000-2017 Free Software Foundation, Inc. |
0555fcce | 3 | Written by Ulrich Drepper <drepper@cygnus.com>, 2000. |
0555fcce | 4 | |
6d248857 WN |
5 | This program is free software: you can redistribute it and/or modify |
6 | it under the terms of the GNU Lesser General Public License as published by | |
7 | the Free Software Foundation; either version 2.1 of the License, or | |
8 | (at your option) any later version. | |
0555fcce | 9 | |
6d248857 | 10 | This program is distributed in the hope that it will be useful, |
0555fcce | 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
6d248857 WN |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
13 | GNU Lesser General Public License for more details. | |
0555fcce | 14 | |
6d248857 WN |
15 | You should have received a copy of the GNU Lesser General Public License |
16 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
0555fcce UD |
17 | |
18 | #ifndef _PLURAL_EXP_H | |
19 | #define _PLURAL_EXP_H | |
20 | ||
0555fcce UD |
21 | #ifndef internal_function |
22 | # define internal_function | |
23 | #endif | |
24 | ||
0f131646 RM |
25 | #ifndef attribute_hidden |
26 | # define attribute_hidden | |
27 | #endif | |
28 | ||
6d248857 WN |
29 | #ifdef __cplusplus |
30 | extern "C" { | |
31 | #endif | |
32 | ||
33 | ||
34 | enum expression_operator | |
35 | { | |
36 | /* Without arguments: */ | |
37 | var, /* The variable "n". */ | |
38 | num, /* Decimal number. */ | |
39 | /* Unary operators: */ | |
40 | lnot, /* Logical NOT. */ | |
41 | /* Binary operators: */ | |
42 | mult, /* Multiplication. */ | |
43 | divide, /* Division. */ | |
44 | module, /* Modulo operation. */ | |
45 | plus, /* Addition. */ | |
46 | minus, /* Subtraction. */ | |
47 | less_than, /* Comparison. */ | |
48 | greater_than, /* Comparison. */ | |
49 | less_or_equal, /* Comparison. */ | |
50 | greater_or_equal, /* Comparison. */ | |
51 | equal, /* Comparison for equality. */ | |
52 | not_equal, /* Comparison for inequality. */ | |
53 | land, /* Logical AND. */ | |
54 | lor, /* Logical OR. */ | |
55 | /* Ternary operators: */ | |
56 | qmop /* Question mark operator. */ | |
57 | }; | |
0555fcce UD |
58 | |
59 | /* This is the representation of the expressions to determine the | |
60 | plural form. */ | |
61 | struct expression | |
62 | { | |
63 | int nargs; /* Number of arguments. */ | |
6d248857 | 64 | enum expression_operator operation; |
0555fcce UD |
65 | union |
66 | { | |
67 | unsigned long int num; /* Number value for `num'. */ | |
68 | struct expression *args[3]; /* Up to three arguments. */ | |
69 | } val; | |
70 | }; | |
71 | ||
72 | /* This is the data structure to pass information to the parser and get | |
73 | the result in a thread-safe way. */ | |
74 | struct parse_args | |
75 | { | |
76 | const char *cp; | |
77 | struct expression *res; | |
78 | }; | |
79 | ||
80 | ||
81 | /* Names for the libintl functions are a problem. This source code is used | |
82 | 1. in the GNU C Library library, | |
83 | 2. in the GNU libintl library, | |
84 | 3. in the GNU gettext tools. | |
85 | The function names in each situation must be different, to allow for | |
86 | binary incompatible changes in 'struct expression'. Furthermore, | |
87 | 1. in the GNU C Library library, the names have a __ prefix, | |
88 | 2.+3. in the GNU libintl library and in the GNU gettext tools, the names | |
89 | must follow ANSI C and not start with __. | |
90 | So we have to distinguish the three cases. */ | |
91 | #ifdef _LIBC | |
92 | # define FREE_EXPRESSION __gettext_free_exp | |
93 | # define PLURAL_PARSE __gettextparse | |
94 | # define GERMANIC_PLURAL __gettext_germanic_plural | |
95 | # define EXTRACT_PLURAL_EXPRESSION __gettext_extract_plural | |
96 | #elif defined (IN_LIBINTL) | |
0f131646 RM |
97 | # define FREE_EXPRESSION libintl_gettext_free_exp |
98 | # define PLURAL_PARSE libintl_gettextparse | |
99 | # define GERMANIC_PLURAL libintl_gettext_germanic_plural | |
100 | # define EXTRACT_PLURAL_EXPRESSION libintl_gettext_extract_plural | |
0555fcce UD |
101 | #else |
102 | # define FREE_EXPRESSION free_plural_expression | |
103 | # define PLURAL_PARSE parse_plural_expression | |
104 | # define GERMANIC_PLURAL germanic_plural | |
105 | # define EXTRACT_PLURAL_EXPRESSION extract_plural_expression | |
106 | #endif | |
107 | ||
6d248857 | 108 | extern void FREE_EXPRESSION (struct expression *exp) |
0555fcce | 109 | internal_function; |
6d248857 | 110 | extern int PLURAL_PARSE (struct parse_args *arg); |
72005a5d | 111 | extern const struct expression GERMANIC_PLURAL attribute_hidden; |
6d248857 WN |
112 | extern void EXTRACT_PLURAL_EXPRESSION (const char *nullentry, |
113 | const struct expression **pluralp, | |
114 | unsigned long int *npluralsp) | |
115 | internal_function; | |
116 | ||
117 | #if !defined (_LIBC) && !defined (IN_LIBINTL) && !defined (IN_LIBGLOCALE) | |
118 | extern unsigned long int plural_eval (const struct expression *pexp, | |
119 | unsigned long int n); | |
120 | #endif | |
121 | ||
0555fcce | 122 | |
6d248857 WN |
123 | #ifdef __cplusplus |
124 | } | |
0f131646 RM |
125 | #endif |
126 | ||
0555fcce | 127 | #endif /* _PLURAL_EXP_H */ |