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Diffstat (limited to 'intl/plural-exp.h')
| -rw-r--r-- | intl/plural-exp.h | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/intl/plural-exp.h b/intl/plural-exp.h new file mode 100644 index 0000000..9e5d165 --- /dev/null +++ b/intl/plural-exp.h @@ -0,0 +1,126 @@ +/* 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 */ |