types.h

/*
   Copyright 2012 Dynastream Innovations, Inc.

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
*/

#if !defined(TYPES_H)
#define TYPES_H
#define LITTLE_ENDIAN

#if defined(PC_SIM)
   #include <windows.h>
#endif


//////////////////////////////////////////////////////////////////////////////////
// Public Definitions
//////////////////////////////////////////////////////////////////////////////////

#define TRUE                           1
#define FALSE                          0

#if !defined(NULL)
   #define NULL                        ((void *) 0)
#endif

#define MAX_UCHAR                      0xFF
#define MAX_SCHAR                      0x7F
#define MIN_SCHAR                      0x80

#define MAX_SHORT                      0x7FFF
#define MIN_SHORT                      0x8000
#define MAX_USHORT                     0xFFFF
#define MAX_SSHORT                     0x7FFF
#define MIN_SSHORT                     0x8000

#define MAX_LONG                       0x7FFFFFFF
#define MIN_LONG                       0x80000000
#define MAX_ULONG                      0xFFFFFFFF
#define MAX_SLONG                      0x7FFFFFFF
#define MIN_SLONG                      0x80000000

#if !defined(BASETYPES)                                     // windef.h compatibility
   typedef unsigned char               BOOL;
#endif

typedef unsigned char                  UCHAR;
typedef signed char                    SCHAR;

typedef short                          SHORT;
typedef unsigned short                 USHORT;
typedef signed short                   SSHORT;

#if !defined(LONG)
   typedef long                        LONG;
#endif
typedef unsigned long                  ULONG;
typedef signed long                    SLONG;

typedef float                          FLOAT;
typedef double                         DOUBLE;

typedef union
{
   USHORT usData;
   struct
   {
      #if defined(LITTLE_ENDIAN)
         UCHAR ucLow;
         UCHAR ucHigh;
      #elif defined(BIG_ENDIAN)
         UCHAR ucHigh;
         UCHAR ucLow;
      #else
         #error
      #endif
   } stBytes;
} USHORT_UNION;

typedef union
{
   ULONG ulData;
   UCHAR aucBytes[4];
   struct
   {
      // The least significant byte of the ULONG in this structure is
      // referenced by ucByte0.
      UCHAR ucByte0;
      UCHAR ucByte1;
      UCHAR ucByte2;
      UCHAR ucByte3;
   } stBytes;
} ULONG_UNION;

// The following macro computes offset (in bytes) of a member in a structure.  This compiles to a constant.
#define STRUCT_OFFSET(MEMBER, STRUCT_POINTER) ( ((UCHAR *) &((STRUCT_POINTER) -> MEMBER)) - ((UCHAR *) (STRUCT_POINTER)) )

#endif // !defined(TYPES_H)