limits.h for the Unix PC

[My name is already in the article, you stupid postnews program]

Here's an ANSI C compatible limits.h file for the Unix PC.  Put it in
/usr/include.  (And stop putting those "magic constants" in your code. :-)

Bob Wilber  wilber at research.att.com

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#ifndef LIMITS_DOT_H
#define LIMITS_DOT_H
/* ANSI C compatible limits.h file for the 3b1.  If your C compiler doesn't
   understand the U suffix for unsigned constants, define NOT_ANSI_C at
   the front of this file (or before you include it).
*/
#define NOT_ANSI_C /* Stock 3b1 CC can't handle U.  GCC should be able to. */

/* Bits in a char. */
#define CHAR_BIT             8

/* Maximum value of a char. (3b1 uses signed chars.) */
#define CHAR_MAX      SCHAR_MAX

/* Minimum value of a char. */
#define CHAR_MIN      SCHAR_MIN

/* Maximum value of an int. */
#define INT_MAX      2147483647

/* Minimum value of an int. */
#define INT_MIN   (-2147483648)

/* Maximum value of a long. */
#define LONG_MAX    2147483647L

/* Minimum value of a long. */
#define LONG_MIN (-2147483648L)

/* Maximum value of a signed char. */
#define SCHAR_MAX           127

/* Minimum value of a signed char. */
#define SCHAR_MIN        (-128)

/* Maximum value of a short. */
#define SHRT_MAX          32767

/* Minimum value of a short. */
#define SHRT_MIN       (-32768)

#ifdef NOT_ANSI_C

/* Maximum value of an unsigned char. */
#define UCHAR_MAX          ((unsigned int) 255)

/* Maximum value of an unsigned int. */
#define UINT_MAX    ((unsigned int) 4294967295)

/* Maximum value of an unsigned long. */
#define ULONG_MAX ((unsigned long) 4294967295L)

/* Maximum value of an unsigned short. */
#define USHRT_MAX        ((unsigned int) 65535)

#else

/* Maximum value of an unsigned char. */
#define UCHAR_MAX         255U

/* Maximum value of an unsigned int. */
#define UINT_MAX   4294967295U

/* Maximum value of an unsigned long. */
#define ULONG_MAX 4294967295UL

/* Maximum value of an unsigned short. */
#define USHRT_MAX       65535U

#endif
#endif /* LIMITS_DOT_H */