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Member "plptools-1.0.15/intl/plural-exp.c" (31 Oct 2019, 4058 Bytes) of package /linux/privat/plptools-1.0.15.tar.gz:


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    1 /* Expression parsing for plural form selection.
    2    Copyright (C) 2000-2015 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
    6    it under the terms of the GNU Lesser General Public License as published by
    7    the Free Software Foundation; either version 2.1 of the License, or
    8    (at your option) 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
   13    GNU Lesser General Public License for more details.
   14 
   15    You should have received a copy of the GNU Lesser General Public License
   16    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
   17 
   18 #ifdef HAVE_CONFIG_H
   19 # include <config.h>
   20 #endif
   21 
   22 #include <ctype.h>
   23 #include <stdlib.h>
   24 #include <string.h>
   25 
   26 #include "plural-exp.h"
   27 
   28 #if (defined __GNUC__ && !(defined __APPLE_CC_ && __APPLE_CC__ > 1) \
   29      && !defined __cplusplus)                                       \
   30     || (defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L)
   31 
   32 /* These structs are the constant expression for the germanic plural
   33    form determination.  It represents the expression  "n != 1".  */
   34 static const struct expression plvar =
   35 {
   36   .nargs = 0,
   37   .operation = var,
   38 };
   39 static const struct expression plone =
   40 {
   41   .nargs = 0,
   42   .operation = num,
   43   .val =
   44   {
   45     .num = 1
   46   }
   47 };
   48 const struct expression GERMANIC_PLURAL =
   49 {
   50   .nargs = 2,
   51   .operation = not_equal,
   52   .val =
   53   {
   54     .args =
   55     {
   56       [0] = (struct expression *) &plvar,
   57       [1] = (struct expression *) &plone
   58     }
   59   }
   60 };
   61 
   62 # define INIT_GERMANIC_PLURAL()
   63 
   64 #else
   65 
   66 /* For compilers without support for ISO C 99 struct/union initializers:
   67    Initialization at run-time.  */
   68 
   69 static struct expression plvar;
   70 static struct expression plone;
   71 struct expression GERMANIC_PLURAL;
   72 
   73 static void
   74 init_germanic_plural (void)
   75 {
   76   if (plone.val.num == 0)
   77     {
   78       plvar.nargs = 0;
   79       plvar.operation = var;
   80 
   81       plone.nargs = 0;
   82       plone.operation = num;
   83       plone.val.num = 1;
   84 
   85       GERMANIC_PLURAL.nargs = 2;
   86       GERMANIC_PLURAL.operation = not_equal;
   87       GERMANIC_PLURAL.val.args[0] = &plvar;
   88       GERMANIC_PLURAL.val.args[1] = &plone;
   89     }
   90 }
   91 
   92 # define INIT_GERMANIC_PLURAL() init_germanic_plural ()
   93 
   94 #endif
   95 
   96 void
   97 internal_function
   98 EXTRACT_PLURAL_EXPRESSION (const char *nullentry,
   99                const struct expression **pluralp,
  100                unsigned long int *npluralsp)
  101 {
  102   if (nullentry != NULL)
  103     {
  104       const char *plural;
  105       const char *nplurals;
  106 
  107       plural = strstr (nullentry, "plural=");
  108       nplurals = strstr (nullentry, "nplurals=");
  109       if (plural == NULL || nplurals == NULL)
  110     goto no_plural;
  111       else
  112     {
  113       char *endp;
  114       unsigned long int n;
  115       struct parse_args args;
  116 
  117       /* First get the number.  */
  118       nplurals += 9;
  119       while (*nplurals != '\0' && isspace ((unsigned char) *nplurals))
  120         ++nplurals;
  121       if (!(*nplurals >= '0' && *nplurals <= '9'))
  122         goto no_plural;
  123 #if defined HAVE_STRTOUL || defined _LIBC
  124       n = strtoul (nplurals, &endp, 10);
  125 #else
  126       for (endp = nplurals, n = 0; *endp >= '0' && *endp <= '9'; endp++)
  127         n = n * 10 + (*endp - '0');
  128 #endif
  129       if (nplurals == endp)
  130         goto no_plural;
  131       *npluralsp = n;
  132 
  133       /* Due to the restrictions bison imposes onto the interface of the
  134          scanner function we have to put the input string and the result
  135          passed up from the parser into the same structure which address
  136          is passed down to the parser.  */
  137       plural += 7;
  138       args.cp = plural;
  139       if (PLURAL_PARSE (&args) != 0)
  140         goto no_plural;
  141       *pluralp = args.res;
  142     }
  143     }
  144   else
  145     {
  146       /* By default we are using the Germanic form: singular form only
  147          for `one', the plural form otherwise.  Yes, this is also what
  148          English is using since English is a Germanic language.  */
  149     no_plural:
  150       INIT_GERMANIC_PLURAL ();
  151       *pluralp = &GERMANIC_PLURAL;
  152       *npluralsp = 2;
  153     }
  154 }