*: initial commit of stripped schism stuff

Forking schism tracker's IT playback stuff into a little playback
library for embedding in demos.

1 files changed, 68 insertions, 0 deletions

diff --git a/src/sys/posix/slurp-mmap.c b/src/sys/posix/slurp-mmap.c
new file mode 100644
index 0000000..9996486
--- /dev/null
+++ b/src/sys/posix/slurp-mmap.c
@@ -0,0 +1,68 @@
+/*
+ * Schism Tracker - a cross-platform Impulse Tracker clone
+ * copyright (c) 2003-2005 Storlek <storlek@rigelseven.com>
+ * copyright (c) 2005-2008 Mrs. Brisby <mrs.brisby@nimh.org>
+ * copyright (c) 2009 Storlek & Mrs. Brisby
+ * copyright (c) 2010-2012 Storlek
+ * URL: http://schismtracker.org/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, 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 General Public License for more details.
+ *
+ * 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
+ */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#if HAVE_MMAP
+#include <sys/types.h>
+#include <sys/mman.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+#include "slurp.h"
+
+static void _munmap_slurp(slurp_t *useme)
+{
+	(void)munmap((void*)useme->data, useme->length);
+	(void)close(useme->extra);
+}
+
+int slurp_mmap(slurp_t *useme, const char *filename, size_t st)
+{
+	int fd;
+	void *addr;
+
+	fd = open(filename, O_RDONLY);
+	if (fd == -1) return 0;
+	addr = mmap(NULL, st, PROT_READ, MAP_SHARED
+#if defined(MAP_POPULATE) && defined(MAP_NONBLOCK)
+		| MAP_POPULATE | MAP_NONBLOCK
+#endif
+#if defined(MAP_NORESERVE)
+		| MAP_NORESERVE
+#endif
+		, fd, 0);
+	if (!addr || addr == ((void*)-1)) {
+		(void)close(fd);
+		return -1;
+	}
+	useme->closure = _munmap_slurp;
+	useme->length = st;
+	useme->data = addr;
+	useme->extra = fd;
+	return 1;
+}
+
+#endif