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USUALS.H
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C/C++ Source or Header
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1993-05-09
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1KB
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42 lines
/* usuals.h - The usual typedefs, etc.
*/
#ifndef USUALS /* Assures no redefinitions of usual types...*/
#define USUALS
typedef unsigned char boolean; /* values are TRUE or FALSE */
typedef unsigned char byte; /* values are 0-255 */
typedef byte *byteptr; /* pointer to byte */
typedef char *string; /* pointer to ASCII character string */
typedef unsigned short word16; /* values are 0-65535 */
#ifdef __alpha
typedef unsigned int word32; /* values are 0-4294967295 */
#else
typedef unsigned long word32; /* values are 0-4294967295 */
#endif
#ifndef TRUE
#define FALSE 0
#define TRUE (!FALSE)
#endif /* if TRUE not already defined */
#ifndef min /* if min macro not already defined */
#define min(a,b) (((a)<(b)) ? (a) : (b) )
#define max(a,b) (((a)>(b)) ? (a) : (b) )
#endif /* if min macro not already defined */
/* void for use in pointers */
#ifndef NO_VOID_STAR
#define VOID void
#else
#define VOID char
#endif
/* Zero-fill the byte buffer. */
#define fill0(buffer,count) memset( buffer, 0, count )
/* This macro is for burning sensitive data. Many of the
file I/O routines use it for zapping buffers */
#define burn(x) fill0((VOID *)&(x),sizeof(x))
#endif /* if USUALS not already defined */