1/* $NetBSD: plural-exp.h,v 1.1.1.1 2016/01/14 00:11:28 christos Exp $ */ 2 3/* Expression parsing and evaluation for plural form selection. 4 Copyright (C) 2000-2003 Free Software Foundation, Inc. 5 Written by Ulrich Drepper <drepper@cygnus.com>, 2000. 6 7 This program is free software; you can redistribute it and/or modify it 8 under the terms of the GNU Library General Public License as published 9 by the Free Software Foundation; either version 2, or (at your option) 10 any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 Library General Public License for more details. 16 17 You should have received a copy of the GNU Library General Public 18 License along with this program; if not, write to the Free Software 19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 20 USA. */ 21 22#ifndef _PLURAL_EXP_H 23#define _PLURAL_EXP_H 24 25#ifndef internal_function 26# define internal_function 27#endif 28 29#ifndef attribute_hidden 30# define attribute_hidden 31#endif 32 33 34/* This is the representation of the expressions to determine the 35 plural form. */ 36struct expression 37{ 38 int nargs; /* Number of arguments. */ 39 enum operator 40 { 41 /* Without arguments: */ 42 var, /* The variable "n". */ 43 num, /* Decimal number. */ 44 /* Unary operators: */ 45 lnot, /* Logical NOT. */ 46 /* Binary operators: */ 47 mult, /* Multiplication. */ 48 divide, /* Division. */ 49 module, /* Modulo operation. */ 50 plus, /* Addition. */ 51 minus, /* Subtraction. */ 52 less_than, /* Comparison. */ 53 greater_than, /* Comparison. */ 54 less_or_equal, /* Comparison. */ 55 greater_or_equal, /* Comparison. */ 56 equal, /* Comparison for equality. */ 57 not_equal, /* Comparison for inequality. */ 58 land, /* Logical AND. */ 59 lor, /* Logical OR. */ 60 /* Ternary operators: */ 61 qmop /* Question mark operator. */ 62 } operation; 63 union 64 { 65 unsigned long int num; /* Number value for `num'. */ 66 struct expression *args[3]; /* Up to three arguments. */ 67 } val; 68}; 69 70/* This is the data structure to pass information to the parser and get 71 the result in a thread-safe way. */ 72struct parse_args 73{ 74 const char *cp; 75 struct expression *res; 76}; 77 78 79/* Names for the libintl functions are a problem. This source code is used 80 1. in the GNU C Library library, 81 2. in the GNU libintl library, 82 3. in the GNU gettext tools. 83 The function names in each situation must be different, to allow for 84 binary incompatible changes in 'struct expression'. Furthermore, 85 1. in the GNU C Library library, the names have a __ prefix, 86 2.+3. in the GNU libintl library and in the GNU gettext tools, the names 87 must follow ANSI C and not start with __. 88 So we have to distinguish the three cases. */ 89#ifdef _LIBC 90# define FREE_EXPRESSION __gettext_free_exp 91# define PLURAL_PARSE __gettextparse 92# define GERMANIC_PLURAL __gettext_germanic_plural 93# define EXTRACT_PLURAL_EXPRESSION __gettext_extract_plural 94#elif defined (IN_LIBINTL) 95# define FREE_EXPRESSION libintl_gettext_free_exp 96# define PLURAL_PARSE libintl_gettextparse 97# define GERMANIC_PLURAL libintl_gettext_germanic_plural 98# define EXTRACT_PLURAL_EXPRESSION libintl_gettext_extract_plural 99#else 100# define FREE_EXPRESSION free_plural_expression 101# define PLURAL_PARSE parse_plural_expression 102# define GERMANIC_PLURAL germanic_plural 103# define EXTRACT_PLURAL_EXPRESSION extract_plural_expression 104#endif 105 106extern void FREE_EXPRESSION (struct expression *exp) 107 internal_function; 108extern int PLURAL_PARSE (void *arg); 109extern struct expression GERMANIC_PLURAL attribute_hidden; 110extern void EXTRACT_PLURAL_EXPRESSION (const char *nullentry, 111 struct expression **pluralp, 112 unsigned long int *npluralsp) 113 internal_function; 114 115#if !defined (_LIBC) && !defined (IN_LIBINTL) 116extern unsigned long int plural_eval (struct expression *pexp, 117 unsigned long int n); 118#endif 119 120#endif /* _PLURAL_EXP_H */ 121