9e2f73fe90
https://github.com/llvm/llvm-project/issues/159474 Another try of trying to land https://github.com/llvm/llvm-project/pull/166382 - Fix some leftover tests checking for specific errnos - Guard errno checking tests to not run on the GPU @michaelrj-google
57 lines
1.8 KiB
C++
57 lines
1.8 KiB
C++
//===-- Implementation of strfroml ------------------------------*- 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/stdlib/strfroml.h"
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#include "src/__support/CPP/limits.h"
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#include "src/__support/macros/config.h"
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#include "src/stdio/printf_core/core_structs.h"
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#include "src/stdio/printf_core/error_mapper.h"
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#include "src/stdlib/str_from_util.h"
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namespace LIBC_NAMESPACE_DECL {
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LLVM_LIBC_FUNCTION(int, strfroml,
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(char *__restrict s, size_t n, const char *__restrict format,
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long double fp)) {
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LIBC_ASSERT(s != nullptr);
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printf_core::FormatSection section =
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internal::parse_format_string(format, fp);
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// To ensure that the conversion function actually uses long double,
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// the length modifier has to be set to LenghtModifier::L
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section.length_modifier = printf_core::LengthModifier::L;
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printf_core::WriteBuffer<printf_core::Mode<
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printf_core::WriteMode::FILL_BUFF_AND_DROP_OVERFLOW>::value>
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wb(s, (n > 0 ? n - 1 : 0));
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printf_core::Writer writer(wb);
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int result = 0;
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if (section.has_conv)
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result = internal::strfromfloat_convert<long double>(&writer, section);
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else
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result = writer.write(section.raw_string);
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if (result < 0)
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return result;
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if (n > 0)
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wb.buff[wb.buff_cur] = '\0';
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if (writer.get_chars_written() >
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static_cast<size_t>(cpp::numeric_limits<int>::max())) {
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libc_errno =
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printf_core::internal_error_to_errno(-printf_core::OVERFLOW_ERROR);
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return -1;
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}
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return static_cast<int>(writer.get_chars_written());
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}
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} // namespace LIBC_NAMESPACE_DECL
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