You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation,
- Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
#ifdef HAVE_CONFIG_H
-#include <config.h>
+# include <config.h>
#endif
#include <alloca.h>
+#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#else
# include "gettext.h"
#endif
-#define N_(msgid) (msgid)
+#define N_(msgid) msgid
#include "argp.h"
#include "argp-namefrob.h"
+#define alignof(type) offsetof (struct { char c; type x; }, x)
+#define alignto(n, d) ((((n) + (d) - 1) / (d)) * (d))
+
/* Getopt return values. */
#define KEY_END (-1) /* The end of the options. */
#define KEY_ARG 1 /* A non-option argument. */
struct group *group;
struct parser_sizes szs;
struct _getopt_data opt_data = _GETOPT_DATA_INITIALIZER;
+ char *storage;
+ size_t glen, gsum;
+ size_t clen, csum;
+ size_t llen, lsum;
+ size_t slen, ssum;
szs.short_len = (flags & ARGP_NO_ARGS) ? 0 : 1;
szs.long_len = 0;
calc_sizes (argp, &szs);
/* Lengths of the various bits of storage used by PARSER. */
-#define GLEN (szs.num_groups + 1) * sizeof (struct group)
-#define CLEN (szs.num_child_inputs * sizeof (void *))
-#define LLEN ((szs.long_len + 1) * sizeof (struct option))
-#define SLEN (szs.short_len + 1)
-
- parser->storage = malloc (GLEN + CLEN + LLEN + SLEN);
+ glen = (szs.num_groups + 1) * sizeof (struct group);
+ clen = szs.num_child_inputs * sizeof (void *);
+ llen = (szs.long_len + 1) * sizeof (struct option);
+ slen = szs.short_len + 1;
+
+ /* Sums of previous lengths, properly aligned. There's no need to
+ align gsum, since struct group is aligned at least as strictly as
+ void * (since it contains a void * member). And there's no need
+ to align lsum, since struct option is aligned at least as
+ strictly as char. */
+ gsum = glen;
+ csum = alignto (gsum + clen, alignof (struct option));
+ lsum = csum + llen;
+ ssum = lsum + slen;
+
+ parser->storage = malloc (ssum);
if (! parser->storage)
return ENOMEM;
+ storage = parser->storage;
parser->groups = parser->storage;
- parser->child_inputs = parser->storage + GLEN;
- parser->long_opts = parser->storage + GLEN + CLEN;
- parser->short_opts = parser->storage + GLEN + CLEN + LLEN;
+ parser->child_inputs = (void **) (storage + gsum);
+ parser->long_opts = (struct option *) (storage + csum);
+ parser->short_opts = storage + lsum;
parser->opt_data = opt_data;
- memset (parser->child_inputs, 0, szs.num_child_inputs * sizeof (void *));
+ memset (parser->child_inputs, 0, clen);
parser_convert (parser, argp, flags);
memset (&parser->state, 0, sizeof (struct argp_state));