1 //===-- include/Support/DataTypes.h - Define fixed size types ---*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by the LLVM research group and is distributed under
6 // the University of Illinois Open Source License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file contains definitions to figure out the size of _HOST_ data types.
11 // This file is important because different host OS's define different macros,
12 // which makes portability tough. This file exports the following definitions:
14 // [u]int(32|64)_t : typedefs for signed and unsigned 32/64 bit system types
15 // [U]INT(8|16|32|64)_(MIN|MAX) : Constants for the min and max values.
17 // No library is required when using these functinons.
19 //===----------------------------------------------------------------------===//
21 #ifndef SUPPORT_DATATYPES_H
22 #define SUPPORT_DATATYPES_H
24 // Note that this header's correct operation depends on __STDC_LIMIT_MACROS
25 // being defined. We would define it here, but in order to prevent Bad Things
26 // happening when system headers or C++ STL headers include stdint.h before
27 // we define it here, we define it on the g++ command line (in Makefile.rules).
28 #if !defined(__STDC_LIMIT_MACROS)
29 # error "Must #define __STDC_LIMIT_MACROS before #including Support/DataTypes.h"
33 // Note that <inttypes.h> includes <stdint.h>, if this is a C99 system.
37 // Visual C++ doesn't provide standard integer headers, but it does provide
38 // built-in data types.
39 typedef __int64 int64_t;
40 typedef unsigned __int64 uint64_t;
41 typedef signed int int32_t;
42 typedef unsigned int uint32_t;
43 typedef signed int ssize_t;
47 #define INT16_MAX 32767
48 #define INT16_MIN -32768
49 #define UINT16_MAX 65535
50 #define INT32_MAX 2147483647
51 #define INT32_MIN -2147483648
52 #define UINT32_MAX 4294967295U
55 #if !defined(INT64_MAX)
56 /* We couldn't determine INT64_MAX; default it. */
57 # define INT64_MAX 9223372036854775807LL
59 #if !defined(UINT64_MAX)
60 # define UINT64_MAX 0xffffffffffffffffULL
63 #endif /* SUPPORT_DATATYPES_H */