C Implementation limits description

This section describes the limits on values defined for this implementation.

Environmental limits

The following environmental limits are defined for this implementation:

Table A-7 limits.h

 ------------------------------------------------------
 Variable     Limit
 ------------------------------------------------------
 CHAR_BIT      8
 CHAR_MAX      SCHAR_MAX
 CHAR_MIN      SCHAR_MIN
 INT_MAX       2147483647
 INT_MIN       -INT_MAX-1
 LONG_MAX      2147483647L
 LONG_MIN      -LONG_MAX-1
 MB_LEN_MAX    5
 SCHAR_MIN     (-128)
 SCHAR_MAX     127
 SHRT_MAX      32767
 SHRT_MIN      (-32768)
 UCHAR_MAX     255
 UINT_MAX      4294967295U
 ULONG_MAX     4294967295UL
 USHRT_MAX     65535

Table A-8 float.h

 --------------------------------------------------------------
 Variable          Limit
 --------------------------------------------------------------
 FLT_ROUNDS         (+__flt_rounds)

 FLT_RADIX          2
 FLT_MANT_DIG       24
 FLT_EPSILON        ((float)1.19209290E-07F)
 FLT_DIG            6
 FLT_MIN_EXP        (-125)
 FLT_MIN            ((float)1.17549435E-38F)
 FLT_MIN_10_EXP     (-37)
 FLT_MAX_EXP        128
 FLT_MAX            ((float)3.40282347E+38F)
 FLT_MAX_10_EXP     38

 DBL_MANT_DIG       53
 DBL_EPSILON        2.2204460492503131E-16
 DBL_DIG            15
 DBL_MIN_EXP        (-1021)
 DBL_MIN            2.2250738585072014E-308
 DBL_MIN_10_EXP     (-307)
 DBL_MAX_EXP        1024
 DBL_MAX            1.7976931348623157E+308

 LDBL_MANT_DIG      64
 LDBL_EPSILON       1.0842021724855044340075E-19L
 LDBL_DIG           18
 LDBL_MIN_EXP       (-16381)
 LDBL_MIN           (+__ldmin[0])
 LDBL_MIN_10_EXP    (-4931)
 LDBL_MAX_EXP       16384
 LDBL_MAX           (+__ldmax)
 LDBL_MAX_10_EXP    4932