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