plural-exp.h
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- /* Expression parsing and evaluation for plural form selection.
- Copyright (C) 2000, 2001, 2002 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 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
- USA. */
- #ifndef _PLURAL_EXP_H
- #define _PLURAL_EXP_H
- #ifndef PARAMS
- # if __STDC__ || defined __GNUC__ || defined __SUNPRO_C || defined __cplusplus || __PROTOTYPES
- # define PARAMS(args) args
- # else
- # define PARAMS(args) ()
- # endif
- #endif
- #ifndef internal_function
- # define internal_function
- #endif
- #ifndef attribute_hidden
- # define attribute_hidden
- #endif
- /* This is the representation of the expressions to determine the
- plural form. */
- struct expression
- {
- int nargs; /* Number of arguments. */
- enum 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. */
- } 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 PARAMS ((struct expression *exp))
- internal_function;
- extern int PLURAL_PARSE PARAMS ((void *arg));
- extern struct expression GERMANIC_PLURAL attribute_hidden;
- extern void EXTRACT_PLURAL_EXPRESSION PARAMS ((const char *nullentry,
- struct expression **pluralp,
- unsigned long int *npluralsp))
- internal_function;
- #if !defined (_LIBC) && !defined (IN_LIBINTL)
- extern unsigned long int plural_eval PARAMS ((struct expression *pexp,
- unsigned long int n));
- #endif
- #endif /* _PLURAL_EXP_H */