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Member "sitecopy-0.16.6/intl/plural-exp.h" (13 Oct 2007, 4185 Bytes) of archive /linux/www/sitecopy-0.16.6.tar.gz:


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    1 /* Expression parsing and evaluation for plural form selection.
    2    Copyright (C) 2000-2003, 2005-2007 Free Software Foundation, Inc.
    3    Written by Ulrich Drepper <drepper@cygnus.com>, 2000.
    4 
    5    This program is free software; you can redistribute it and/or modify it
    6    under the terms of the GNU Library General Public License as published
    7    by the Free Software Foundation; either version 2, or (at your option)
    8    any later version.
    9 
   10    This program is distributed in the hope that it will be useful,
   11    but WITHOUT ANY WARRANTY; without even the implied warranty of
   12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   13    Library General Public License for more details.
   14 
   15    You should have received a copy of the GNU Library General Public
   16    License along with this program; if not, write to the Free Software
   17    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
   18    USA.  */
   19 
   20 #ifndef _PLURAL_EXP_H
   21 #define _PLURAL_EXP_H
   22 
   23 #ifndef internal_function
   24 # define internal_function
   25 #endif
   26 
   27 #ifndef attribute_hidden
   28 # define attribute_hidden
   29 #endif
   30 
   31 #ifdef __cplusplus
   32 extern "C" {
   33 #endif
   34 
   35 
   36 enum expression_operator
   37 {
   38   /* Without arguments:  */
   39   var,              /* The variable "n".  */
   40   num,              /* Decimal number.  */
   41   /* Unary operators:  */
   42   lnot,             /* Logical NOT.  */
   43   /* Binary operators:  */
   44   mult,             /* Multiplication.  */
   45   divide,           /* Division.  */
   46   module,           /* Modulo operation.  */
   47   plus,             /* Addition.  */
   48   minus,            /* Subtraction.  */
   49   less_than,            /* Comparison.  */
   50   greater_than,         /* Comparison.  */
   51   less_or_equal,        /* Comparison.  */
   52   greater_or_equal,     /* Comparison.  */
   53   equal,            /* Comparison for equality.  */
   54   not_equal,            /* Comparison for inequality.  */
   55   land,             /* Logical AND.  */
   56   lor,              /* Logical OR.  */
   57   /* Ternary operators:  */
   58   qmop              /* Question mark operator.  */
   59 };
   60 
   61 /* This is the representation of the expressions to determine the
   62    plural form.  */
   63 struct expression
   64 {
   65   int nargs;            /* Number of arguments.  */
   66   enum expression_operator 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 libintl_gettext_free_exp
  100 # define PLURAL_PARSE libintl_gettextparse
  101 # define GERMANIC_PLURAL libintl_gettext_germanic_plural
  102 # define EXTRACT_PLURAL_EXPRESSION libintl_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 (struct expression *exp)
  111      internal_function;
  112 extern int PLURAL_PARSE (void *arg);
  113 extern struct expression GERMANIC_PLURAL attribute_hidden;
  114 extern void EXTRACT_PLURAL_EXPRESSION (const char *nullentry,
  115                        const struct expression **pluralp,
  116                        unsigned long int *npluralsp)
  117      internal_function;
  118 
  119 #if !defined (_LIBC) && !defined (IN_LIBINTL) && !defined (IN_LIBGLOCALE)
  120 extern unsigned long int plural_eval (const struct expression *pexp,
  121                       unsigned long int n);
  122 #endif
  123 
  124 
  125 #ifdef __cplusplus
  126 }
  127 #endif
  128 
  129 #endif /* _PLURAL_EXP_H */