34 lines
1.2 KiB
C++
34 lines
1.2 KiB
C++
//===-- Implementation of vsscanf -------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "src/stdio/vsscanf.h"
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#include "hdr/stdio_macros.h"
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#include "src/__support/CPP/limits.h"
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#include "src/__support/arg_list.h"
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#include "src/stdio/scanf_core/reader.h"
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#include "src/stdio/scanf_core/scanf_main.h"
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#include <stdarg.h>
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namespace LIBC_NAMESPACE_DECL {
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LLVM_LIBC_FUNCTION(int, vsscanf,
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(const char *buffer, const char *format, va_list vlist)) {
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internal::ArgList args(vlist);
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scanf_core::ReadBuffer rb{const_cast<char *>(buffer),
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cpp::numeric_limits<size_t>::max()};
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scanf_core::Reader reader(&rb);
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int ret_val = scanf_core::scanf_main(&reader, format, args);
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// This is done to avoid including stdio.h in the internals. On most systems
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// EOF is -1, so this will be transformed into just "return ret_val".
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return (ret_val == -1) ? EOF : ret_val;
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}
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} // namespace LIBC_NAMESPACE_DECL
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