basictypes.h revision c5cede9ae108bb15f6b7a8aea21c7e1fefa2834c 
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>).
22typedef int8_t int8;
23typedef uint8_t uint8;
24typedef int16_t int16;
25typedef int32_t int32;
26typedef uint16_t uint16;
27typedef 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)
37typedef long int64;
38typedef unsigned long uint64;
39#else
40typedef long long int64;
41typedef unsigned long long uint64;
42#endif
43
44// DEPRECATED: Please use std::numeric_limits (from <limits>) instead.
45const uint8  kuint8max  = (( uint8) 0xFF);
46const uint16 kuint16max = ((uint16) 0xFFFF);
47const uint32 kuint32max = ((uint32) 0xFFFFFFFF);
48const uint64 kuint64max = ((uint64) 0xFFFFFFFFFFFFFFFFULL);
49const  int8  kint8min   = ((  int8) 0x80);
50const  int8  kint8max   = ((  int8) 0x7F);
51const  int16 kint16min  = (( int16) 0x8000);
52const  int16 kint16max  = (( int16) 0x7FFF);
53const  int32 kint32min  = (( int32) 0x80000000);
54const  int32 kint32max  = (( int32) 0x7FFFFFFF);
55const  int64 kint64min  = (( int64) 0x8000000000000000LL);
56const  int64 kint64max  = (( int64) 0x7FFFFFFFFFFFFFFFLL);
57
58#endif  // BASE_BASICTYPES_H_
59