| /* Expression parsing and evaluation for plural form selection. |
| Copyright (C) 2000-2018 Free Software Foundation, Inc. |
| Written by Ulrich Drepper <drepper@cygnus.com>, 2000. |
| |
| This program is free software: you can redistribute it and/or modify |
| it under the terms of the GNU Lesser General Public License as published by |
| the Free Software Foundation; either version 2.1 of the License, 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 Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public License |
| along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| |
| #ifndef _PLURAL_EXP_H |
| #define _PLURAL_EXP_H |
| |
| #ifndef attribute_hidden |
| # define attribute_hidden |
| #endif |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| |
| enum expression_operator |
| { |
| /* Without arguments: */ |
| var, /* The variable "n". */ |
| num, /* Decimal number. */ |
| /* Unary operators: */ |
| lnot, /* Logical NOT. */ |
| /* Binary operators: */ |
| mult, /* Multiplication. */ |
| divide, /* Division. */ |
| module, /* Modulo operation. */ |
| plus, /* Addition. */ |
| minus, /* Subtraction. */ |
| less_than, /* Comparison. */ |
| greater_than, /* Comparison. */ |
| less_or_equal, /* Comparison. */ |
| greater_or_equal, /* Comparison. */ |
| equal, /* Comparison for equality. */ |
| not_equal, /* Comparison for inequality. */ |
| land, /* Logical AND. */ |
| lor, /* Logical OR. */ |
| /* Ternary operators: */ |
| qmop /* Question mark operator. */ |
| }; |
| |
| /* This is the representation of the expressions to determine the |
| plural form. */ |
| struct expression |
| { |
| int nargs; /* Number of arguments. */ |
| enum expression_operator operation; |
| union |
| { |
| unsigned long int num; /* Number value for `num'. */ |
| struct expression *args[3]; /* Up to three arguments. */ |
| } val; |
| }; |
| |
| /* This is the data structure to pass information to the parser and get |
| the result in a thread-safe way. */ |
| struct parse_args |
| { |
| const char *cp; |
| struct expression *res; |
| }; |
| |
| |
| /* Names for the libintl functions are a problem. This source code is used |
| 1. in the GNU C Library library, |
| 2. in the GNU libintl library, |
| 3. in the GNU gettext tools. |
| The function names in each situation must be different, to allow for |
| binary incompatible changes in 'struct expression'. Furthermore, |
| 1. in the GNU C Library library, the names have a __ prefix, |
| 2.+3. in the GNU libintl library and in the GNU gettext tools, the names |
| must follow ANSI C and not start with __. |
| So we have to distinguish the three cases. */ |
| #ifdef _LIBC |
| # define FREE_EXPRESSION __gettext_free_exp |
| # define PLURAL_PARSE __gettextparse |
| # define GERMANIC_PLURAL __gettext_germanic_plural |
| # define EXTRACT_PLURAL_EXPRESSION __gettext_extract_plural |
| #elif defined (IN_LIBINTL) |
| # define FREE_EXPRESSION libintl_gettext_free_exp |
| # define PLURAL_PARSE libintl_gettextparse |
| # define GERMANIC_PLURAL libintl_gettext_germanic_plural |
| # define EXTRACT_PLURAL_EXPRESSION libintl_gettext_extract_plural |
| #else |
| # define FREE_EXPRESSION free_plural_expression |
| # define PLURAL_PARSE parse_plural_expression |
| # define GERMANIC_PLURAL germanic_plural |
| # define EXTRACT_PLURAL_EXPRESSION extract_plural_expression |
| #endif |
| |
| extern void FREE_EXPRESSION (struct expression *exp) attribute_hidden; |
| extern int PLURAL_PARSE (struct parse_args *arg); |
| extern const struct expression GERMANIC_PLURAL attribute_hidden; |
| extern void EXTRACT_PLURAL_EXPRESSION (const char *nullentry, |
| const struct expression **pluralp, |
| unsigned long int *npluralsp) |
| attribute_hidden; |
| |
| #if !defined (_LIBC) && !defined (IN_LIBINTL) && !defined (IN_LIBGLOCALE) |
| extern unsigned long int plural_eval (const struct expression *pexp, |
| unsigned long int n); |
| #endif |
| |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif /* _PLURAL_EXP_H */ |