kernel/include/mytypes.h

   1 /*
   2  *  ZeX/OS
   3  *  Copyright (C) 2007  Tomas 'ZeXx86' Jedrzejek (zexx86@zexos.org)
   4  *
   5  *  This program is free software: you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation, either version 3 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19
  20 #ifndef MYTYPES_H_
  21 #define MYTYPES_H_
  22
  23 /* hardware datatypes */
  24 typedef unsigned char BYTE;           /* 8-bit byte */
  25 typedef unsigned short WORD;          /* 16-bit word */
  26 typedef unsigned long DWORD;          /* 32-bit dword */
  27 typedef unsigned long addr_t;         /* address that should not be deref'd */
  28
  29 /* integer types */
  30 typedef unsigned char UINT8;          /* 8-bit unsigned integer */
  31 typedef signed char INT8;             /* 8-bit signed integer */
  32 typedef unsigned short UINT16;        /* 16-bit unsigned integer */
  33 typedef signed short INT16;           /* 16-bit signed integer */
  34 typedef unsigned long UINT32;         /* 32-bit unsigned integer */
  35 typedef signed long INT32;            /* 32-bit signed integer */
  36
  37 /* logical datatypes */
  38 typedef unsigned char CHAR;           /* ISO 8859-1 character */
  39 typedef unsigned char *STRPTR;        /* C-style NUL-terminated string */
  40 typedef enum { false = 0, true = 1 } bool; /* boolean value */
  41
  42
  43
  44 /* useful macros */
  45 #define BITFIELD(name,width) unsigned int name : width
  46 #define HIBYTE(x) ((BYTE)((x) >> 8))
  47 #define LOBYTE(x) ((BYTE)((x) & 0xff))
  48 #define ABS(x) ((x) < 0 ? -(x) : (x))    /* NB: multiple evaluations! */
  49
  50 #endif /* MYTYPES_H_ */