stdarg.h (2497B) - Raw
1 /*===---- stdarg.h - Variable argument handling ----------------------------=== 2 * 3 * Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 * See https://llvm.org/LICENSE.txt for license information. 5 * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 * 7 *===-----------------------------------------------------------------------=== 8 */ 9 10 /* 11 * This header is designed to be included multiple times. If any of the __need_ 12 * macros are defined, then only that subset of interfaces are provided. This 13 * can be useful for POSIX headers that need to not expose all of stdarg.h, but 14 * need to use some of its interfaces. Otherwise this header provides all of 15 * the expected interfaces. 16 * 17 * When clang modules are enabled, this header is a textual header to support 18 * the multiple include behavior. As such, it doesn't directly declare anything 19 * so that it doesn't add duplicate declarations to all of its includers' 20 * modules. 21 */ 22 #if defined(__MVS__) && __has_include_next(<stdarg.h>) 23 #undef __need___va_list 24 #undef __need_va_list 25 #undef __need_va_arg 26 #undef __need___va_copy 27 #undef __need_va_copy 28 #include <__stdarg_header_macro.h> 29 #include_next <stdarg.h> 30 31 #else 32 #if !defined(__need___va_list) && !defined(__need_va_list) && \ 33 !defined(__need_va_arg) && !defined(__need___va_copy) && \ 34 !defined(__need_va_copy) 35 #define __need___va_list 36 #define __need_va_list 37 #define __need_va_arg 38 #define __need___va_copy 39 /* GCC always defines __va_copy, but does not define va_copy unless in c99 mode 40 * or -ansi is not specified, since it was not part of C90. 41 */ 42 #if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) || \ 43 (defined(__cplusplus) && __cplusplus >= 201103L) || \ 44 !defined(__STRICT_ANSI__) 45 #define __need_va_copy 46 #endif 47 #include <__stdarg_header_macro.h> 48 #endif 49 50 #ifdef __need___va_list 51 #include <__stdarg___gnuc_va_list.h> 52 #undef __need___va_list 53 #endif /* defined(__need___va_list) */ 54 55 #ifdef __need_va_list 56 #include <__stdarg_va_list.h> 57 #undef __need_va_list 58 #endif /* defined(__need_va_list) */ 59 60 #ifdef __need_va_arg 61 #include <__stdarg_va_arg.h> 62 #undef __need_va_arg 63 #endif /* defined(__need_va_arg) */ 64 65 #ifdef __need___va_copy 66 #include <__stdarg___va_copy.h> 67 #undef __need___va_copy 68 #endif /* defined(__need___va_copy) */ 69 70 #ifdef __need_va_copy 71 #include <__stdarg_va_copy.h> 72 #undef __need_va_copy 73 #endif /* defined(__need_va_copy) */ 74 75 #endif /* __MVS__ */