1*b8f134faSJoseph Huber //===-- Implementation of vscanf --------------------------------*- C++ -*-===// 2*b8f134faSJoseph Huber // 3*b8f134faSJoseph Huber // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4*b8f134faSJoseph Huber // See https://llvm.org/LICENSE.txt for license information. 5*b8f134faSJoseph Huber // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6*b8f134faSJoseph Huber // 7*b8f134faSJoseph Huber //===----------------------------------------------------------------------===// 8*b8f134faSJoseph Huber 9*b8f134faSJoseph Huber #include "src/stdio/vscanf.h" 10*b8f134faSJoseph Huber 11*b8f134faSJoseph Huber #include "src/__support/File/file.h" 12*b8f134faSJoseph Huber #include "src/__support/arg_list.h" 13*b8f134faSJoseph Huber #include "src/__support/macros/config.h" 14*b8f134faSJoseph Huber #include "src/stdio/scanf_core/vfscanf_internal.h" 15*b8f134faSJoseph Huber 16*b8f134faSJoseph Huber #include "hdr/types/FILE.h" 17*b8f134faSJoseph Huber #include <stdarg.h> 18*b8f134faSJoseph Huber 19*b8f134faSJoseph Huber #ifndef LIBC_COPT_STDIO_USE_SYSTEM_FILE 20*b8f134faSJoseph Huber #define SCANF_STDIN LIBC_NAMESPACE::stdin 21*b8f134faSJoseph Huber #else // LIBC_COPT_STDIO_USE_SYSTEM_FILE 22*b8f134faSJoseph Huber #define SCANF_STDIN ::stdin 23*b8f134faSJoseph Huber #endif // LIBC_COPT_STDIO_USE_SYSTEM_FILE 24*b8f134faSJoseph Huber 25*b8f134faSJoseph Huber namespace LIBC_NAMESPACE_DECL { 26*b8f134faSJoseph Huber 27*b8f134faSJoseph Huber LLVM_LIBC_FUNCTION(int, vscanf, 28*b8f134faSJoseph Huber (const char *__restrict format, va_list vlist)) { 29*b8f134faSJoseph Huber internal::ArgList args(vlist); // This holder class allows for easier copying 30*b8f134faSJoseph Huber // and pointer semantics, as well as handling 31*b8f134faSJoseph Huber // destruction automatically. 32*b8f134faSJoseph Huber va_end(vlist); 33*b8f134faSJoseph Huber int ret_val = scanf_core::vfscanf_internal( 34*b8f134faSJoseph Huber reinterpret_cast<::FILE *>(SCANF_STDIN), format, args); 35*b8f134faSJoseph Huber // This is done to avoid including stdio.h in the internals. On most systems 36*b8f134faSJoseph Huber // EOF is -1, so this will be transformed into just "return ret_val". 37*b8f134faSJoseph Huber return (ret_val == -1) ? EOF : ret_val; 38*b8f134faSJoseph Huber } 39*b8f134faSJoseph Huber 40*b8f134faSJoseph Huber } // namespace LIBC_NAMESPACE_DECL 41