git.sur5r.net Git - cc65/blob - src/common/bitops.h

   1 /*****************************************************************************/
   2 /*                                                                           */
   3 /*                                 bitops.h                                  */
   4 /*                                                                           */
   5 /*                           Single bit operations                           */
   6 /*                                                                           */
   7 /*                                                                           */
   8 /*                                                                           */
   9 /* (C) 1998     Ullrich von Bassewitz                                        */
  10 /*              Wacholderweg 14                                              */
  11 /*              D-70597 Stuttgart                                            */
  12 /* EMail:       uz@musoftware.de                                             */
  13 /*                                                                           */
  14 /*                                                                           */
  15 /* This software is provided 'as-is', without any expressed or implied       */
  16 /* warranty.  In no event will the authors be held liable for any damages    */
  17 /* arising from the use of this software.                                    */
  18 /*                                                                           */
  19 /* Permission is granted to anyone to use this software for any purpose,     */
  20 /* including commercial applications, and to alter it and redistribute it    */
  21 /* freely, subject to the following restrictions:                            */
  22 /*                                                                           */
  23 /* 1. The origin of this software must not be misrepresented; you must not   */
  24 /*    claim that you wrote the original software. If you use this software   */
  25 /*    in a product, an acknowledgment in the product documentation would be  */
  26 /*    appreciated but is not required.                                       */
  27 /* 2. Altered source versions must be plainly marked as such, and must not   */
  28 /*    be misrepresented as being the original software.                      */
  29 /* 3. This notice may not be removed or altered from any source              */
  30 /*    distribution.                                                          */
  31 /*                                                                           */
  32 /*****************************************************************************/
  33
  34
  35
  36 #ifndef BITOPS_H
  37 #define BITOPS_H
  38
  39
  40
  41 #include "attrib.h"
  42
  43
  44
  45 /*****************************************************************************/
  46 /*                                   Code                                    */
  47 /*****************************************************************************/
  48
  49
  50
  51 unsigned BitFind (unsigned long Val) attribute ((const));
  52 /* Find the first bit that is set in Val. Val must *not* be zero */
  53
  54 void BitSet (void* Data, unsigned Bit);
  55 /* Set a bit in a char array */
  56
  57 void BitReset (void* Data, unsigned Bit);
  58 /* Reset a bit in a char array */
  59
  60 int BitIsSet (void* Data, unsigned Bit) attribute ((const));
  61 /* Check if a bit is set in a char array */
  62
  63 int BitIsReset (void* Data, unsigned Bit) attribute ((const));
  64 /* Check if a bit is reset in a char array */
  65
  66 void BitMerge (void* Target, const void* Source, unsigned Size);
  67 /* Merge the bits of two char arrays (that is, do an or for the full array) */
  68
  69
  70
  71 /* End of bitops.h */
  72
  73 #endif
  74
  75
  76