1//===-- Implementation of strfromf ------------------------------*- C++ -*-===//
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#include "src/stdlib/strfromf.h"
10#include "src/__support/macros/config.h"
11#include "src/stdlib/str_from_util.h"
12
13namespace LIBC_NAMESPACE_DECL {
14
15LLVM_LIBC_FUNCTION(int, strfromf,
16 (char *__restrict s, size_t n, const char *__restrict format,
17 float fp)) {
18 LIBC_ASSERT(s != nullptr);
19
20 printf_core::FormatSection section =
21 internal::parse_format_string(format, fp);
22 printf_core::WriteBuffer<printf_core::Mode<
23 printf_core::WriteMode::FILL_BUFF_AND_DROP_OVERFLOW>::value>
24 wb(s, (n > 0 ? n - 1 : 0));
25 printf_core::Writer writer(wb);
26
27 int result = 0;
28 if (section.has_conv)
29 result = internal::strfromfloat_convert<float>(&writer, section);
30 else
31 result = writer.write(section.raw_string);
32
33 if (result < 0)
34 return result;
35
36 if (n > 0)
37 wb.buff[wb.buff_cur] = '\0';
38
39 return writer.get_chars_written();
40}
41
42} // namespace LIBC_NAMESPACE_DECL
43

Provided by KDAB

Privacy Policy
Learn to use CMake with our Intro Training
Find out more

source code of libc/src/stdlib/strfromf.cpp