com32/include/syslinux/features.h

   1 /* ----------------------------------------------------------------------- *
   2  *
   3  *   Copyright 2007-2008 H. Peter Anvin - All Rights Reserved
   4  *
   5  *   Permission is hereby granted, free of charge, to any person
   6  *   obtaining a copy of this software and associated documentation
   7  *   files (the "Software"), to deal in the Software without
   8  *   restriction, including without limitation the rights to use,
   9  *   copy, modify, merge, publish, distribute, sublicense, and/or
  10  *   sell copies of the Software, and to permit persons to whom
  11  *   the Software is furnished to do so, subject to the following
  12  *   conditions:
  13  *
  14  *   The above copyright notice and this permission notice shall
  15  *   be included in all copies or substantial portions of the Software.
  16  *
  17  *   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  18  *   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
  19  *   OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  20  *   NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
  21  *   HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  22  *   WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  23  *   FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  24  *   OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  * ----------------------------------------------------------------------- */
  27
  28 #ifndef _SYSLINUX_FEATURES_H
  29 #define _SYSLINUX_FEATURES_H
  30
  31 #define SYSLINUX_FEATURE_LOCAL_BOOT     (0*8+0)
  32 #define SYSLINUX_FEATURE_NOOP_IDLE      (0*8+1)
  33
  34 extern struct __syslinux_feature_flags {
  35   unsigned int len;
  36   const unsigned char *ptr;
  37 } __syslinux_feature_flags;
  38
  39 static inline int syslinux_has_feature(unsigned int __flag)
  40 {
  41   unsigned int __byte = __flag >> 3;
  42   unsigned int __bit = __flag & 7;
  43
  44   if (__byte <= __syslinux_feature_flags.len)
  45     return (__syslinux_feature_flags.ptr[__byte] >> __bit) & 1;
  46   else
  47     return 0;
  48 }
  49
  50 #endif /* _SYSLINUX_FEATURE_H */