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 // int64_t : is a typedef for the signed 64 bit system type
15 // uint64_t : is a typedef for the unsigned 64 bit system type
16 // INT64_MAX : is a #define specifying the max value for int64_t's
18 // No library is required when using these functinons.
20 //===----------------------------------------------------------------------===//
22 #ifndef SUPPORT_DATATYPES_H
23 #define SUPPORT_DATATYPES_H
25 // Note that this header's correct operation depends on __STDC_LIMIT_MACROS
26 // being defined. We would define it here, but in order to prevent Bad Things
27 // happening when system headers or C++ STL headers include stdint.h before
28 // we define it here, we define it on the g++ command line (in Makefile.rules).
29 #if !defined(__STDC_LIMIT_MACROS)
30 # error "Must #define __STDC_LIMIT_MACROS before #including Support/DataTypes.h"
34 // Note that <inttypes.h> includes <stdint.h>, if this is a C99 system.
38 // Visual C++ doesn't provide standard integer headers, but it does provide
39 // built-in data types.
40 typedef __int64 int64_t;
41 typedef unsigned __int64 uint64_t;
42 typedef signed int int32_t;
43 typedef unsigned int uint32_t;
44 typedef signed int ssize_t;
47 #if !defined(INT64_MAX)
48 /* We couldn't determine INT64_MAX; default it. */
49 # define INT64_MAX 9223372036854775807LL
51 #if !defined(UINT64_MAX)
52 # define UINT64_MAX 0xffffffffffffffffULL
55 #endif /* SUPPORT_DATATYPES_H */