156 lines
4 KiB
C
156 lines
4 KiB
C
/* Expression parsing for plural form selection.
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Copyright (C) 2000, 2001 Free Software Foundation, Inc.
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Written by Ulrich Drepper <drepper@cygnus.com>, 2000.
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This program is free software; you can redistribute it and/or modify it
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under the terms of the GNU Library General Public License as published
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by the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301,
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USA. */
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <ctype.h>
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#include <stdlib.h>
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#include <string.h>
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#include "plural-exp.h"
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#if (defined __GNUC__ && !defined __APPLE_CC__) \
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|| (defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L)
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/* These structs are the constant expression for the germanic plural
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form determination. It represents the expression "n != 1". */
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static const struct expression plvar =
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{
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.nargs = 0,
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.operation = var,
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};
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static const struct expression plone =
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{
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.nargs = 0,
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.operation = num,
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.val =
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{
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.num = 1
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}
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};
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struct expression GERMANIC_PLURAL =
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{
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.nargs = 2,
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.operation = not_equal,
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.val =
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{
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.args =
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{
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[0] = (struct expression *) &plvar,
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[1] = (struct expression *) &plone
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}
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}
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};
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# define INIT_GERMANIC_PLURAL()
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#else
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/* For compilers without support for ISO C 99 struct/union initializers:
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Initialization at run-time. */
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static struct expression plvar;
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static struct expression plone;
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struct expression GERMANIC_PLURAL;
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static void
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init_germanic_plural ()
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{
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if (plone.val.num == 0)
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{
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plvar.nargs = 0;
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plvar.operation = var;
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plone.nargs = 0;
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plone.operation = num;
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plone.val.num = 1;
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GERMANIC_PLURAL.nargs = 2;
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GERMANIC_PLURAL.operation = not_equal;
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GERMANIC_PLURAL.val.args[0] = &plvar;
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GERMANIC_PLURAL.val.args[1] = &plone;
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}
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}
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# define INIT_GERMANIC_PLURAL() init_germanic_plural ()
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#endif
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void
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internal_function
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EXTRACT_PLURAL_EXPRESSION (nullentry, pluralp, npluralsp)
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const char *nullentry;
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struct expression **pluralp;
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unsigned long int *npluralsp;
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{
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if (nullentry != NULL)
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{
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const char *plural;
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const char *nplurals;
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plural = strstr (nullentry, "plural=");
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nplurals = strstr (nullentry, "nplurals=");
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if (plural == NULL || nplurals == NULL)
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goto no_plural;
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else
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{
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char *endp;
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unsigned long int n;
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struct parse_args args;
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/* First get the number. */
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nplurals += 9;
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while (*nplurals != '\0' && isspace ((unsigned char) *nplurals))
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++nplurals;
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if (!(*nplurals >= '0' && *nplurals <= '9'))
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goto no_plural;
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#if defined HAVE_STRTOUL || defined _LIBC
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n = strtoul (nplurals, &endp, 10);
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#else
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for (endp = nplurals, n = 0; *endp >= '0' && *endp <= '9'; endp++)
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n = n * 10 + (*endp - '0');
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#endif
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if (nplurals == endp)
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goto no_plural;
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*npluralsp = n;
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/* Due to the restrictions bison imposes onto the interface of the
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scanner function we have to put the input string and the result
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passed up from the parser into the same structure which address
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is passed down to the parser. */
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plural += 7;
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args.cp = plural;
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if (PLURAL_PARSE (&args) != 0)
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goto no_plural;
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*pluralp = args.res;
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}
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}
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else
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{
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/* By default we are using the Germanic form: singular form only
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for `one', the plural form otherwise. Yes, this is also what
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English is using since English is a Germanic language. */
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no_plural:
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INIT_GERMANIC_PLURAL ();
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*pluralp = &GERMANIC_PLURAL;
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*npluralsp = 2;
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}
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}
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