stddef.h revision 04f5db699e5c1198f30cba17fd12f38805ab04df
18ba179d4a39c79ae486472a5f413f763ffcc0739Eli Friedman/*===---- stddef.h - Basic type definitions --------------------------------=== 28ba179d4a39c79ae486472a5f413f763ffcc0739Eli Friedman * 38ba179d4a39c79ae486472a5f413f763ffcc0739Eli Friedman * Copyright (c) 2008 Eli Friedman 48ba179d4a39c79ae486472a5f413f763ffcc0739Eli Friedman * 58ba179d4a39c79ae486472a5f413f763ffcc0739Eli Friedman * Permission is hereby granted, free of charge, to any person obtaining a copy 68ba179d4a39c79ae486472a5f413f763ffcc0739Eli Friedman * of this software and associated documentation files (the "Software"), to deal 78ba179d4a39c79ae486472a5f413f763ffcc0739Eli Friedman * in the Software without restriction, including without limitation the rights 88ba179d4a39c79ae486472a5f413f763ffcc0739Eli Friedman * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 98ba179d4a39c79ae486472a5f413f763ffcc0739Eli Friedman * copies of the Software, and to permit persons to whom the Software is 108ba179d4a39c79ae486472a5f413f763ffcc0739Eli Friedman * furnished to do so, subject to the following conditions: 118ba179d4a39c79ae486472a5f413f763ffcc0739Eli Friedman * 128ba179d4a39c79ae486472a5f413f763ffcc0739Eli Friedman * The above copyright notice and this permission notice shall be included in 138ba179d4a39c79ae486472a5f413f763ffcc0739Eli Friedman * all copies or substantial portions of the Software. 148ba179d4a39c79ae486472a5f413f763ffcc0739Eli Friedman * 158ba179d4a39c79ae486472a5f413f763ffcc0739Eli Friedman * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 168ba179d4a39c79ae486472a5f413f763ffcc0739Eli Friedman * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 178ba179d4a39c79ae486472a5f413f763ffcc0739Eli Friedman * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 188ba179d4a39c79ae486472a5f413f763ffcc0739Eli Friedman * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 198ba179d4a39c79ae486472a5f413f763ffcc0739Eli Friedman * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 208ba179d4a39c79ae486472a5f413f763ffcc0739Eli Friedman * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 218ba179d4a39c79ae486472a5f413f763ffcc0739Eli Friedman * THE SOFTWARE. 228ba179d4a39c79ae486472a5f413f763ffcc0739Eli Friedman * 238ba179d4a39c79ae486472a5f413f763ffcc0739Eli Friedman *===-----------------------------------------------------------------------=== 248ba179d4a39c79ae486472a5f413f763ffcc0739Eli Friedman */ 258ba179d4a39c79ae486472a5f413f763ffcc0739Eli Friedman 268ba179d4a39c79ae486472a5f413f763ffcc0739Eli Friedman#ifndef __STDDEF_H 278ba179d4a39c79ae486472a5f413f763ffcc0739Eli Friedman#define __STDDEF_H 288ba179d4a39c79ae486472a5f413f763ffcc0739Eli Friedman 29daf2e1c636799535a7eb058ffab93cdf52f466cbDouglas Gregor#if !defined(_PTRDIFF_T) || __has_feature(modules) 30daf2e1c636799535a7eb058ffab93cdf52f466cbDouglas Gregor/* Always define ptrdiff_t when modules are available. */ 31daf2e1c636799535a7eb058ffab93cdf52f466cbDouglas Gregor#if !__has_feature(modules) 328da6bca896546cd98ad6aefaa3e9eba77736ea7bTed Kremenek#define _PTRDIFF_T 33daf2e1c636799535a7eb058ffab93cdf52f466cbDouglas Gregor#endif 341fc271c38aaa68dce73d6f1bee9f6fd3474e51f0Daniel Dunbartypedef __PTRDIFF_TYPE__ ptrdiff_t; 358da6bca896546cd98ad6aefaa3e9eba77736ea7bTed Kremenek#endif 36daf2e1c636799535a7eb058ffab93cdf52f466cbDouglas Gregor 37daf2e1c636799535a7eb058ffab93cdf52f466cbDouglas Gregor#if !defined(_SIZE_T) || __has_feature(modules) 38daf2e1c636799535a7eb058ffab93cdf52f466cbDouglas Gregor/* Always define size_t when modules are available. */ 39daf2e1c636799535a7eb058ffab93cdf52f466cbDouglas Gregor#if !__has_feature(modules) 4021259bafdc0e113c8bdce51d7911cc9880da1892Ted Kremenek#define _SIZE_T 41daf2e1c636799535a7eb058ffab93cdf52f466cbDouglas Gregor#endif 421fc271c38aaa68dce73d6f1bee9f6fd3474e51f0Daniel Dunbartypedef __SIZE_TYPE__ size_t; 4321259bafdc0e113c8bdce51d7911cc9880da1892Ted Kremenek#endif 44daf2e1c636799535a7eb058ffab93cdf52f466cbDouglas Gregor 458ba179d4a39c79ae486472a5f413f763ffcc0739Eli Friedman#ifndef __cplusplus 46daf2e1c636799535a7eb058ffab93cdf52f466cbDouglas Gregor/* Always define wchar_t when modules are available. */ 47daf2e1c636799535a7eb058ffab93cdf52f466cbDouglas Gregor#if !defined(_WCHAR_T) || __has_feature(modules) 48daf2e1c636799535a7eb058ffab93cdf52f466cbDouglas Gregor#if !__has_feature(modules) 4921259bafdc0e113c8bdce51d7911cc9880da1892Ted Kremenek#define _WCHAR_T 50daf2e1c636799535a7eb058ffab93cdf52f466cbDouglas Gregor#endif 516d6370ee10ddcd8cacc44c2d6796800c1325c732Chris Lattnertypedef __WCHAR_TYPE__ wchar_t; 528ba179d4a39c79ae486472a5f413f763ffcc0739Eli Friedman#endif 5321259bafdc0e113c8bdce51d7911cc9880da1892Ted Kremenek#endif 548ba179d4a39c79ae486472a5f413f763ffcc0739Eli Friedman 5521259bafdc0e113c8bdce51d7911cc9880da1892Ted Kremenek#undef NULL 5604f5db699e5c1198f30cba17fd12f38805ab04dfArgyrios Kyrtzidis#ifdef __cplusplus 5708e46f97ec8c00cc1bfe87fcd014db211a878ffbNico Weber# if !defined(__MINGW32__) && !defined(_MSC_VER) 5808e46f97ec8c00cc1bfe87fcd014db211a878ffbNico Weber# define NULL __null 5908e46f97ec8c00cc1bfe87fcd014db211a878ffbNico Weber# else 6008e46f97ec8c00cc1bfe87fcd014db211a878ffbNico Weber# define NULL 0 6108e46f97ec8c00cc1bfe87fcd014db211a878ffbNico Weber# endif 62f8e61b371d085516b8b9b906099db3e0b915a7c0Anders Carlsson#else 6308e46f97ec8c00cc1bfe87fcd014db211a878ffbNico Weber# define NULL ((void*)0) 64f8e61b371d085516b8b9b906099db3e0b915a7c0Anders Carlsson#endif 65f8e61b371d085516b8b9b906099db3e0b915a7c0Anders Carlsson 66e25d3df6df39ecca4dad4647be2713cb85653634Douglas Gregor#ifdef __cplusplus 67e25d3df6df39ecca4dad4647be2713cb85653634Douglas Gregor#if defined(_MSC_EXTENSIONS) && defined(_NATIVE_NULLPTR_SUPPORTED) 68e25d3df6df39ecca4dad4647be2713cb85653634Douglas Gregornamespace std { typedef decltype(nullptr) nullptr_t; } 69e25d3df6df39ecca4dad4647be2713cb85653634Douglas Gregorusing ::std::nullptr_t; 70e25d3df6df39ecca4dad4647be2713cb85653634Douglas Gregor#endif 71e25d3df6df39ecca4dad4647be2713cb85653634Douglas Gregor#endif 72e25d3df6df39ecca4dad4647be2713cb85653634Douglas Gregor 738ba179d4a39c79ae486472a5f413f763ffcc0739Eli Friedman#define offsetof(t, d) __builtin_offsetof(t, d) 748ba179d4a39c79ae486472a5f413f763ffcc0739Eli Friedman 758ba179d4a39c79ae486472a5f413f763ffcc0739Eli Friedman#endif /* __STDDEF_H */ 7651f56fc36e6d441b6dd722cc09c4ac9f081c0974NAKAMURA Takumi 7751f56fc36e6d441b6dd722cc09c4ac9f081c0974NAKAMURA Takumi/* Some C libraries expect to see a wint_t here. Others (notably MinGW) will use 78fc8f0e14ad142ed811e90fbd9a30e419e301c717Chris Lattner__WINT_TYPE__ directly; accommodate both by requiring __need_wint_t */ 7951f56fc36e6d441b6dd722cc09c4ac9f081c0974NAKAMURA Takumi#if defined(__need_wint_t) 80daf2e1c636799535a7eb058ffab93cdf52f466cbDouglas Gregor/* Always define wint_t when modules are available. */ 81daf2e1c636799535a7eb058ffab93cdf52f466cbDouglas Gregor#if !defined(_WINT_T) || __has_feature(modules) 82daf2e1c636799535a7eb058ffab93cdf52f466cbDouglas Gregor#if !__has_feature(modules) 8351f56fc36e6d441b6dd722cc09c4ac9f081c0974NAKAMURA Takumi#define _WINT_T 84daf2e1c636799535a7eb058ffab93cdf52f466cbDouglas Gregor#endif 8551f56fc36e6d441b6dd722cc09c4ac9f081c0974NAKAMURA Takumitypedef __WINT_TYPE__ wint_t; 86daf2e1c636799535a7eb058ffab93cdf52f466cbDouglas Gregor#endif 8751f56fc36e6d441b6dd722cc09c4ac9f081c0974NAKAMURA Takumi#undef __need_wint_t 8851f56fc36e6d441b6dd722cc09c4ac9f081c0974NAKAMURA Takumi#endif /* __need_wint_t */ 89