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-rw-r--r--intl/plural-exp.c154
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diff --git a/intl/plural-exp.c b/intl/plural-exp.c
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+/* Expression parsing for plural form selection.
+ Copyright (C) 2000-2001, 2003 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
+ USA. */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <ctype.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "plural-exp.h"
+
+#if (defined __GNUC__ && !defined __APPLE_CC__) \
+ || (defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L)
+
+/* These structs are the constant expression for the germanic plural
+ form determination. It represents the expression "n != 1". */
+static const struct expression plvar =
+{
+ .nargs = 0,
+ .operation = var,
+};
+static const struct expression plone =
+{
+ .nargs = 0,
+ .operation = num,
+ .val =
+ {
+ .num = 1
+ }
+};
+struct expression GERMANIC_PLURAL =
+{
+ .nargs = 2,
+ .operation = not_equal,
+ .val =
+ {
+ .args =
+ {
+ [0] = (struct expression *) &plvar,
+ [1] = (struct expression *) &plone
+ }
+ }
+};
+
+# define INIT_GERMANIC_PLURAL()
+
+#else
+
+/* For compilers without support for ISO C 99 struct/union initializers:
+ Initialization at run-time. */
+
+static struct expression plvar;
+static struct expression plone;
+struct expression GERMANIC_PLURAL;
+
+static void
+init_germanic_plural ()
+{
+ if (plone.val.num == 0)
+ {
+ plvar.nargs = 0;
+ plvar.operation = var;
+
+ plone.nargs = 0;
+ plone.operation = num;
+ plone.val.num = 1;
+
+ GERMANIC_PLURAL.nargs = 2;
+ GERMANIC_PLURAL.operation = not_equal;
+ GERMANIC_PLURAL.val.args[0] = &plvar;
+ GERMANIC_PLURAL.val.args[1] = &plone;
+ }
+}
+
+# define INIT_GERMANIC_PLURAL() init_germanic_plural ()
+
+#endif
+
+void
+internal_function
+EXTRACT_PLURAL_EXPRESSION (const char *nullentry, struct expression **pluralp,
+ unsigned long int *npluralsp)
+{
+ if (nullentry != NULL)
+ {
+ const char *plural;
+ const char *nplurals;
+
+ plural = strstr (nullentry, "plural=");
+ nplurals = strstr (nullentry, "nplurals=");
+ if (plural == NULL || nplurals == NULL)
+ goto no_plural;
+ else
+ {
+ char *endp;
+ unsigned long int n;
+ struct parse_args args;
+
+ /* First get the number. */
+ nplurals += 9;
+ while (*nplurals != '\0' && isspace ((unsigned char) *nplurals))
+ ++nplurals;
+ if (!(*nplurals >= '0' && *nplurals <= '9'))
+ goto no_plural;
+#if defined HAVE_STRTOUL || defined _LIBC
+ n = strtoul (nplurals, &endp, 10);
+#else
+ for (endp = nplurals, n = 0; *endp >= '0' && *endp <= '9'; endp++)
+ n = n * 10 + (*endp - '0');
+#endif
+ if (nplurals == endp)
+ goto no_plural;
+ *npluralsp = n;
+
+ /* Due to the restrictions bison imposes onto the interface of the
+ scanner function we have to put the input string and the result
+ passed up from the parser into the same structure which address
+ is passed down to the parser. */
+ plural += 7;
+ args.cp = plural;
+ if (PLURAL_PARSE (&args) != 0)
+ goto no_plural;
+ *pluralp = args.res;
+ }
+ }
+ else
+ {
+ /* By default we are using the Germanic form: singular form only
+ for `one', the plural form otherwise. Yes, this is also what
+ English is using since English is a Germanic language. */
+ no_plural:
+ INIT_GERMANIC_PLURAL ();
+ *pluralp = &GERMANIC_PLURAL;
+ *npluralsp = 2;
+ }
+}