1 /* $NetBSD: plural-exp.h,v 1.1.1.1 2016/01/10 21:36:18 christos Exp $ */ 2 3 /* Expression parsing and evaluation for plural form selection. 4 Copyright (C) 2000, 2001 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 PARAMS 26 # if __STDC__ || defined __GNUC__ || defined __SUNPRO_C || defined __cplusplus || __PROTOTYPES 27 # define PARAMS(args) args 28 # else 29 # define PARAMS(args) () 30 # endif 31 #endif 32 33 #ifndef internal_function 34 # define internal_function 35 #endif 36 37 38 /* This is the representation of the expressions to determine the 39 plural form. */ 40 struct expression 41 { 42 int nargs; /* Number of arguments. */ 43 enum operator 44 { 45 /* Without arguments: */ 46 var, /* The variable "n". */ 47 num, /* Decimal number. */ 48 /* Unary operators: */ 49 lnot, /* Logical NOT. */ 50 /* Binary operators: */ 51 mult, /* Multiplication. */ 52 divide, /* Division. */ 53 module, /* Modulo operation. */ 54 plus, /* Addition. */ 55 minus, /* Subtraction. */ 56 less_than, /* Comparison. */ 57 greater_than, /* Comparison. */ 58 less_or_equal, /* Comparison. */ 59 greater_or_equal, /* Comparison. */ 60 equal, /* Comparison for equality. */ 61 not_equal, /* Comparison for inequality. */ 62 land, /* Logical AND. */ 63 lor, /* Logical OR. */ 64 /* Ternary operators: */ 65 qmop /* Question mark operator. */ 66 } operation; 67 union 68 { 69 unsigned long int num; /* Number value for `num'. */ 70 struct expression *args[3]; /* Up to three arguments. */ 71 } val; 72 }; 73 74 /* This is the data structure to pass information to the parser and get 75 the result in a thread-safe way. */ 76 struct parse_args 77 { 78 const char *cp; 79 struct expression *res; 80 }; 81 82 83 /* Names for the libintl functions are a problem. This source code is used 84 1. in the GNU C Library library, 85 2. in the GNU libintl library, 86 3. in the GNU gettext tools. 87 The function names in each situation must be different, to allow for 88 binary incompatible changes in 'struct expression'. Furthermore, 89 1. in the GNU C Library library, the names have a __ prefix, 90 2.+3. in the GNU libintl library and in the GNU gettext tools, the names 91 must follow ANSI C and not start with __. 92 So we have to distinguish the three cases. */ 93 #ifdef _LIBC 94 # define FREE_EXPRESSION __gettext_free_exp 95 # define PLURAL_PARSE __gettextparse 96 # define GERMANIC_PLURAL __gettext_germanic_plural 97 # define EXTRACT_PLURAL_EXPRESSION __gettext_extract_plural 98 #elif defined (IN_LIBINTL) 99 # define FREE_EXPRESSION gettext_free_exp__ 100 # define PLURAL_PARSE gettextparse__ 101 # define GERMANIC_PLURAL gettext_germanic_plural__ 102 # define EXTRACT_PLURAL_EXPRESSION gettext_extract_plural__ 103 #else 104 # define FREE_EXPRESSION free_plural_expression 105 # define PLURAL_PARSE parse_plural_expression 106 # define GERMANIC_PLURAL germanic_plural 107 # define EXTRACT_PLURAL_EXPRESSION extract_plural_expression 108 #endif 109 110 extern void FREE_EXPRESSION PARAMS ((struct expression *exp)) 111 internal_function; 112 extern int PLURAL_PARSE PARAMS ((void *arg)); 113 extern struct expression GERMANIC_PLURAL; 114 extern void EXTRACT_PLURAL_EXPRESSION PARAMS ((const char *nullentry, 115 struct expression **pluralp, 116 unsigned long int *npluralsp)) 117 internal_function; 118 119 #if !defined (_LIBC) && !defined (IN_LIBINTL) 120 extern unsigned long int plural_eval PARAMS ((struct expression *pexp, 121 unsigned long int n)); 122 #endif 123 124 #endif /* _PLURAL_EXP_H */ 125