Rocco Rutte:

[apps/madmutt.git] / intl / plural-exp.c

diff --git a/intl/plural-exp.c b/intl/plural-exp.c
new file mode 100644 (file)
index 0000000..1873be9
--- /dev/null
+++ b/intl/plural-exp.c
@@ -0,0 +1,154 @@
+/* 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;
+    }
+}