The <limits.h> header file has the following contents:
#ifndef __LIMITS_LOADED
#define __LIMITS_LOADED 1
/*
* <limits.h> - Sizes of integral types
*
* Copyright (c) 1995 by Digital Equipment Corporation. All rights reserved.
*
* DEC C for OpenVMS VAX and OpenVMS Alpha
* DEC C++ for OpenVMS VAX and OpenVMS Alpha
*/
#ifdef __cplusplus
extern "C" {
#endif
/* Note: Section 2.2.4.2 of the Rationale states "The limits for the maxima
and minima of unsigned types are specified as unsigned constants..."
The alert reader will notice there are no minima for the unsigned
types, but we will follow the Rationale's advice anyway. */
/* Number of bits for the smallest object that is not a bit-field (byte): */
#define CHAR_BIT 8
/* Minimum value for an object of type "signed char": */
#define SCHAR_MIN (-SCHAR_MAX - 1)
/* Maximum value for an object of type "signed char": */
#define SCHAR_MAX 127
/* Maximum value for an object of type "unsigned char": */
#define UCHAR_MAX 255u
#ifdef __UNSIGNED_CHAR
/* Minimum value for an object of type "char": */
# define CHAR_MIN 0
/* Maximum value for an object of type "char": */
# define CHAR_MAX UCHAR_MAX
#else
/* Minimum value for an object of type "char": */
# define CHAR_MIN SCHAR_MIN
/* Maximum value for an object of type "char": */
# define CHAR_MAX SCHAR_MAX
#endif
/* Maximum number of bytes in a multibyte character, for any supported locale: */
#if __VMS_VER >= 60200000
#define MB_LEN_MAX 4
#else
#define MB_LEN_MAX 1
#endif
/* Minimum value for an object of type "short int": */
# define SHRT_MIN (-SHRT_MAX - 1)
/* Maximum value for an object of type "short int": */
# define SHRT_MAX 32767
/* Maximum value for an object of type "unsigned short int": */
# define USHRT_MAX 65535u
/* Minimum value for an object of type "int": */
# define INT_MIN (-INT_MAX - 1)
/* Maximum value for an object of type "int": */
# define INT_MAX 2147483647
/* Maximum value for an object of type "unsigned int": */
# define UINT_MAX 4294967295u
/* Minimum value for an object of type "long int": */
# define LONG_MIN (-LONG_MAX - 1)
/* Maximum value for an object of type "long int": */
# define LONG_MAX 2147483647
/* Maximum value for an object of type "unsigned long int": */
# define ULONG_MAX 4294967295u
/* Value for objects of type "__int??": */
# define __INT16_MIN (-__INT16_MAX - 1)
# define __INT16_MAX 32767
# define __UINT16_MAX 65535u
# define __INT32_MIN (-__INT32_MAX - 1)
# define __INT32_MAX 2147483647
# define __UINT32_MAX 4294967295u
#ifdef __ALPHA
# define __INT64_MIN (-__INT64_MAX - 1)
# define __INT64_MAX (((__int64)0x7fffffff << 32) | 0xffffffffu)
# define __UINT64_MAX ((unsigned __int64)0x1 << 63)
#endif
#if __VMS_VER >= 60200000
#define COLL_WEIGHTS_MAX 5
/* Messaging limits */
#define NL_TEXTMAX 8192
#define NL_SETMAX 65535
#define NL_MSGMAX 65535
#define CHARCLASS_NAME_MAX 14
#define NL_ARGMAX 9
#define NL_LANGMAX 14
/* Maximum number of bytes supported for the name of a time zone */
#define TZNAME_MAX 15
/* Maximum value of an object of type ssize_t */
#define SSIZE_MAX INT_MAX
#endif /* OpenVMS V6.2 or later */
#ifdef __cplusplus
}
#endif
#endif /* __LIMITS_LOADED */