base/basictypes.h

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 // This file contains definitions of our old basic integral types
   6 // ((u)int{8,16,32,64}) and further includes. I recommend that you use the C99
   7 // standard types instead, and include <stdint.h>/<stddef.h>/etc. as needed.
   8 // Note that the macros and macro-like constructs that were formerly defined in
   9 // this file are now available separately in base/macros.h.
  10
  11 #ifndef BASE_BASICTYPES_H_
  12 #define BASE_BASICTYPES_H_
  13
  14 #include <limits.h>  // So we can set the bounds of our types.
  15 #include <stddef.h>  // For size_t.
  16 #include <stdint.h>  // For intptr_t.
  17
  18 #include "base/macros.h"
  19 #include "base/port.h"  // Types that only need exist on certain systems.
  20
  21 // DEPRECATED: Please use (u)int{8,16,32,64}_t instead (and include <stdint.h>).
  22 typedef int8_t int8;
  23 typedef uint8_t uint8;
  24 typedef int16_t int16;
  25 typedef int32_t int32;
  26 typedef uint16_t uint16;
  27 typedef uint32_t uint32;
  28
  29 // TODO(vtl): Figure what's up with the 64-bit types. Can we just define them as
  30 // |int64_t|/|uint64_t|?
  31 // The NSPR system headers define 64-bit as |long| when possible, except on
  32 // Mac OS X.  In order to not have typedef mismatches, we do the same on LP64.
  33 //
  34 // On Mac OS X, |long long| is used for 64-bit types for compatibility with
  35 // <inttypes.h> format macros even in the LP64 model.
  36 #if defined(__LP64__) && !defined(OS_MACOSX) && !defined(OS_OPENBSD)
  37 typedef long int64;
  38 typedef unsigned long uint64;
  39 #else
  40 typedef long long int64;
  41 typedef unsigned long long uint64;
  42 #endif
  43
  44 // DEPRECATED: Please use std::numeric_limits (from <limits>) instead.
  45 const uint8  kuint8max  = (( uint8) 0xFF);
  46 const uint16 kuint16max = ((uint16) 0xFFFF);
  47 const uint32 kuint32max = ((uint32) 0xFFFFFFFF);
  48 const uint64 kuint64max = ((uint64) 0xFFFFFFFFFFFFFFFFULL);
  49 const  int8  kint8min   = ((  int8) 0x80);
  50 const  int8  kint8max   = ((  int8) 0x7F);
  51 const  int16 kint16min  = (( int16) 0x8000);
  52 const  int16 kint16max  = (( int16) 0x7FFF);
  53 const  int32 kint32min  = (( int32) 0x80000000);
  54 const  int32 kint32max  = (( int32) 0x7FFFFFFF);
  55 const  int64 kint64min  = (( int64) 0x8000000000000000LL);
  56 const  int64 kint64max  = (( int64) 0x7FFFFFFFFFFFFFFFLL);
  57
  58 #endif  // BASE_BASICTYPES_H_