StdLib/Include/limits.h

   1 /** @file
   2   The header <limits.h> defines several macros that expand to various limits and
   3   parameters of the standard integer types.
   4
   5   The values given below shall be replaced by constant expressions suitable for
   6   use in #if preprocessing directives. Moreover, except for CHAR_BIT and
   7   MB_LEN_MAX, the following shall be replaced by expressions that have the same
   8   type as would an expression that is an object of the corresponding type
   9   converted according to the integer promotions. Their implementation-defined
  10   values shall be equal or greater in magnitude (absolute value) to those
  11   documented, with the same sign.
  12
  13   If the value of an object of type char is treated as a signed integer when
  14   used in an expression, the value of CHAR_MIN shall be the same as that of
  15   SCHAR_MIN and the value of CHAR_MAX shall be the same as that of SCHAR_MAX.
  16   Otherwise, the value of CHAR_MIN shall be 0 and the value of CHAR_MAX shall
  17   be the same as that of UCHAR_MAX.)
  18   The value UCHAR_MAX shall equal 2^(CHAR_BIT - 1).
  19
  20   Copyright (c) 2010, Intel Corporation. All rights reserved.<BR>
  21   This program and the accompanying materials are licensed and made available under
  22   the terms and conditions of the BSD License that accompanies this distribution.
  23   The full text of the license may be found at
  24   http://opensource.org/licenses/bsd-license.php.
  25
  26   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  27   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  28
  29 **/
  30 #ifndef _LIMITS_H
  31 #define _LIMITS_H
  32 #include  <sys/EfiCdefs.h>
  33 #include  <Library/PcdLib.h>
  34
  35 /* Get the architecturally defined limits for this compilation unit. */
  36 #include  <machine/limits.h>
  37
  38 /* Define the values required by Specification. */
  39
  40 /** maximum number of bytes in a multibyte character, for any supported locale **/
  41 #define MB_LEN_MAX  2 /* 16-bit UTC-2 */
  42
  43 /** Number of bits for smallest object that is not a bit-field (byte). **/
  44 #define CHAR_BIT    __CHAR_BIT
  45
  46 /** minimum value for an object of type signed char **/
  47 #define SCHAR_MIN   __SCHAR_MIN
  48
  49 /** maximum value for an object of type signed char **/
  50 #define SCHAR_MAX   __SCHAR_MAX
  51
  52 /** maximum value for an object of type unsigned char **/
  53 #define UCHAR_MAX   __UCHAR_MAX
  54
  55 #ifdef __CHAR_UNSIGNED__
  56   /** maximum value for an object of type char **/
  57   #define CHAR_MAX  UCHAR_MAX
  58   /** minimum value for an object of type char **/
  59   #define CHAR_MIN  0
  60 #else
  61   /** maximum value for an object of type char **/
  62   #define CHAR_MAX  SCHAR_MAX
  63   /** minimum value for an object of type char **/
  64   #define CHAR_MIN  SCHAR_MIN
  65 #endif
  66
  67 /** minimum value for an object of type short int **/
  68 #define SHRT_MIN    __SHRT_MIN
  69
  70 /** maximum value for an object of type short int **/
  71 #define SHRT_MAX    __SHRT_MAX
  72
  73 /** maximum value for an object of type unsigned short int **/
  74 #define USHRT_MAX   __USHRT_MAX
  75
  76 /** minimum value for an object of type int **/
  77 #define INT_MIN     __INT_MIN
  78
  79 /** maximum value for an object of type int **/
  80 #define INT_MAX     __INT_MAX
  81
  82 /** maximum value for an object of type unsigned int **/
  83 #define UINT_MAX    __UINT_MAX
  84
  85 /** minimum value for an object of type long int **/
  86 #define LONG_MIN    __LONG_MIN
  87
  88 /** maximum value for an object of type long int **/
  89 #define LONG_MAX    __LONG_MAX
  90
  91 /** maximum value for an object of type unsigned long int **/
  92 #define ULONG_MAX   __ULONG_MAX
  93
  94 /** minimum value for an object of type long long int **/
  95 #define LLONG_MIN   __LLONG_MIN
  96
  97 /** maximum value for an object of type long long int **/
  98 #define LLONG_MAX   __LLONG_MAX
  99
 100 /** maximum value for an object of type unsigned long long int **/
 101 #define ULLONG_MAX  __ULLONG_MAX
 102
 103 /* Object limits used in the Standard Libraries */
 104 #if (PcdGet32(PcdMaximumAsciiStringLength) > 0)
 105   #define ASCII_STRING_MAX    PcdGet32(PcdMaximumAsciiStringLength)
 106 #else
 107   #define ASCII_STRING_MAX    256
 108 #endif
 109
 110 #if (PcdGet32(PcdMaximumUnicodeStringLength) > 0)
 111   #define UNICODE_STRING_MAX    PcdGet32(PcdMaximumUnicodeStringLength)
 112 #else
 113   #define UNICODE_STRING_MAX    512
 114 #endif
 115
 116 /* Limits for BSD Compatibility */
 117 #define NL_TEXTMAX    2048
 118 #include  <sys/syslimits.h>
 119
 120 #endif  /* _LIMITS_H */