55 lines
1.8 KiB
C
55 lines
1.8 KiB
C
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// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef BASE_PORT_H_
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#define BASE_PORT_H_
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#include <stdarg.h>
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#include "build/build_config.h"
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#ifdef COMPILER_MSVC
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#define GG_LONGLONG(x) x##I64
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#define GG_ULONGLONG(x) x##UI64
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#else
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#define GG_LONGLONG(x) x##LL
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#define GG_ULONGLONG(x) x##ULL
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#endif
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// Per C99 7.8.14, define __STDC_CONSTANT_MACROS before including <stdint.h>
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// to get the INTn_C and UINTn_C macros for integer constants. It's difficult
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// to guarantee any specific ordering of header includes, so it's difficult to
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// guarantee that the INTn_C macros can be defined by including <stdint.h> at
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// any specific point. Provide GG_INTn_C macros instead.
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#define GG_INT8_C(x) (x)
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#define GG_INT16_C(x) (x)
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#define GG_INT32_C(x) (x)
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#define GG_INT64_C(x) GG_LONGLONG(x)
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#define GG_UINT8_C(x) (x ## U)
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#define GG_UINT16_C(x) (x ## U)
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#define GG_UINT32_C(x) (x ## U)
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#define GG_UINT64_C(x) GG_ULONGLONG(x)
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// It's possible for functions that use a va_list, such as StringPrintf, to
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// invalidate the data in it upon use. The fix is to make a copy of the
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// structure before using it and use that copy instead. va_copy is provided
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// for this purpose. MSVC does not provide va_copy, so define an
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// implementation here. It is not guaranteed that assignment is a copy, so the
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// StringUtil.VariableArgsFunc unit test tests this capability.
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#if defined(COMPILER_GCC)
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#define GG_VA_COPY(a, b) (va_copy(a, b))
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#elif defined(COMPILER_MSVC)
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#define GG_VA_COPY(a, b) (a = b)
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#endif
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// Define an OS-neutral wrapper for shared library entry points
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#if defined(OS_WIN)
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#define API_CALL __stdcall
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#else
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#define API_CALL
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#endif
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#endif // BASE_PORT_H_
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