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[chromium-blink-merge.git] / third_party / cld / base / port.h
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1 // Copyright (c) 2006-2008 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.
5 #ifndef BASE_PORT_H_
6 #define BASE_PORT_H_
8 #include <stdarg.h>
9 #include "base/build_config.h"
11 #ifdef COMPILER_MSVC
12 #define GG_LONGLONG(x) x##I64
13 #define GG_ULONGLONG(x) x##UI64
14 #else
15 #define GG_LONGLONG(x) x##LL
16 #define GG_ULONGLONG(x) x##ULL
17 #endif
19 // Per C99 7.8.14, define __STDC_CONSTANT_MACROS before including <stdint.h>
20 // to get the INTn_C and UINTn_C macros for integer constants. It's difficult
21 // to guarantee any specific ordering of header includes, so it's difficult to
22 // guarantee that the INTn_C macros can be defined by including <stdint.h> at
23 // any specific point. Provide GG_INTn_C macros instead.
25 #define GG_INT8_C(x) (x)
26 #define GG_INT16_C(x) (x)
27 #define GG_INT32_C(x) (x)
28 #define GG_INT64_C(x) GG_LONGLONG(x)
30 #define GG_UINT8_C(x) (x ## U)
31 #define GG_UINT16_C(x) (x ## U)
32 #define GG_UINT32_C(x) (x ## U)
33 #define GG_UINT64_C(x) GG_ULONGLONG(x)
35 // It's possible for functions that use a va_list, such as StringPrintf, to
36 // invalidate the data in it upon use. The fix is to make a copy of the
37 // structure before using it and use that copy instead. va_copy is provided
38 // for this purpose. MSVC does not provide va_copy, so define an
39 // implementation here. It is not guaranteed that assignment is a copy, so the
40 // StringUtil.VariableArgsFunc unit test tests this capability.
41 #if defined(COMPILER_GCC)
42 #define GG_VA_COPY(a, b) (va_copy(a, b))
43 #elif defined(COMPILER_MSVC)
44 #define GG_VA_COPY(a, b) (a = b)
45 #endif
47 // Define an OS-neutral wrapper for shared library entry points
48 #if defined(OS_WIN)
49 #define API_CALL __stdcall
50 #else
51 #define API_CALL
52 #endif
54 #endif // BASE_PORT_H_