Add interface for querying the syslinux feature flags.

1 files changed, 50 insertions, 0 deletions

diff --git a/com32/include/syslinux/features.h b/com32/include/syslinux/features.h
new file mode 100644
index 00000000..e3da12e2
--- /dev/null
+++ b/com32/include/syslinux/features.h
@@ -0,0 +1,50 @@
+/* ----------------------------------------------------------------------- *
+ *
+ *   Copyright 2007 H. Peter Anvin - All Rights Reserved
+ *
+ *   Permission is hereby granted, free of charge, to any person
+ *   obtaining a copy of this software and associated documentation
+ *   files (the "Software"), to deal in the Software without
+ *   restriction, including without limitation the rights to use,
+ *   copy, modify, merge, publish, distribute, sublicense, and/or
+ *   sell copies of the Software, and to permit persons to whom
+ *   the Software is furnished to do so, subject to the following
+ *   conditions:
+ *
+ *   The above copyright notice and this permission notice shall
+ *   be included in all copies or substantial portions of the Software.
+ *
+ *   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ *   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ *   OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ *   NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ *   HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ *   WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ *   FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ *   OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * ----------------------------------------------------------------------- */
+
+#ifndef _SYSLINUX_FEATURES_H
+#define _SYSLINUX_FEATURES_H
+
+#define SYSLINUX_FEATURE_LOCAL_BOOT	(0*8+0)
+#define SYSLINUX_FEATURE_NOOP_IDLE	(0*8+1)
+
+extern struct __syslinux_feature_flags {
+  unsigned int len;
+  const unsigned char *ptr;
+} __syslinux_feature_flags;
+
+static inline int syslinux_has_feature(unsigned int __flag)
+{
+  unsigned int __byte = __flag >> 3;
+  unsigned int __bit = __flag & 7;
+
+  if (__byte <= __syslinux_feature_flags.len)
+    return (__syslinux_feature_flags.ptr[__byte] >> __bit) & 1;
+  else
+    return 0;
+}
+
+#endif /* _SYSLINUX_FEATURE_H */