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The closest that Microsoft has is the limits.h file which defines:

    limits.h:#define _POSIX_SSIZE_MAX    32767
    limits.h:#define SSIZE_MAX           _POSIX_SSIZE_MAX

but only if _POSIX_ is defined.

The other xxx_MAX preprocessor variables which are declared in all cases 
are:

    #define CHAR_BIT      8         /* number of bits in a char */
    #define SCHAR_MIN   (-128)      /* minimum signed char value */
    #define SCHAR_MAX     127       /* maximum signed char value */
    #define UCHAR_MAX     0xff      /* maximum unsigned char value */

    #ifndef _CHAR_UNSIGNED
    #define CHAR_MIN    SCHAR_MIN   /* mimimum char value */
    #define CHAR_MAX    SCHAR_MAX   /* maximum char value */
    #else
    #define CHAR_MIN      0
    #define CHAR_MAX    UCHAR_MAX
    #endif  /* _CHAR_UNSIGNED */

    #define MB_LEN_MAX    2             /* max. # bytes in multibyte char */
    #define SHRT_MIN    (-32768)        /* minimum (signed) short value */
    #define SHRT_MAX      32767         /* maximum (signed) short value */
    #define USHRT_MAX     0xffff        /* maximum unsigned short value */
    #define INT_MIN     (-2147483647 - 1) /* minimum (signed) int value */
    #define INT_MAX       2147483647    /* maximum (signed) int value */
    #define UINT_MAX      0xffffffff    /* maximum unsigned int value */
    #define LONG_MIN    (-2147483647L - 1) /* minimum (signed) long value */
    #define LONG_MAX      2147483647L   /* maximum (signed) long value */
    #define ULONG_MAX     0xffffffffUL  /* maximum unsigned long value */

    #if     _INTEGRAL_MAX_BITS >= 8
    #define _I8_MIN     (-127i8 - 1)    /* minimum signed 8 bit value */
    #define _I8_MAX       127i8         /* maximum signed 8 bit value */
    #define _UI8_MAX      0xffui8       /* maximum unsigned 8 bit value */
    #endif

    #if     _INTEGRAL_MAX_BITS >= 16
    #define _I16_MIN    (-32767i16 - 1) /* minimum signed 16 bit value */
    #define _I16_MAX      32767i16      /* maximum signed 16 bit value */
    #define _UI16_MAX     0xffffui16    /* maximum unsigned 16 bit value */
    #endif

    #if     _INTEGRAL_MAX_BITS >= 32
    #define _I32_MIN    (-2147483647i32 - 1) /* minimum signed 32 bit
    value */
    #define _I32_MAX      2147483647i32 /* maximum signed 32 bit value */
    #define _UI32_MAX     0xffffffffui32 /* maximum unsigned 32 bit value */
    #endif

    #if     _INTEGRAL_MAX_BITS >= 64
    /* minimum signed 64 bit value */
    #define _I64_MIN    (-9223372036854775807i64 - 1)
    /* maximum signed 64 bit value */
    #define _I64_MAX      9223372036854775807i64
    /* maximum unsigned 64 bit value */
    #define _UI64_MAX     0xffffffffffffffffui64
    #endif

    #if     _INTEGRAL_MAX_BITS >= 128
    /* minimum signed 128 bit value */
    #define _I128_MIN   (-170141183460469231731687303715884105727i128 - 1)
    /* maximum signed 128 bit value */
    #define _I128_MAX     170141183460469231731687303715884105727i128
    /* maximum unsigned 128 bit value */
    #define _UI128_MAX    0xffffffffffffffffffffffffffffffffui128
    #endif




Ken Raeburn wrote:

> Oops.  SIZE_MAX is a C99 addition, defined in stdint.h.  I should 
> check whether Windows and other platforms have it, or if a default is 
> needed...  It's the limit of size_t, like LONG_MAX is for long.
>
> Ken
>
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