blob: 71e257f08645be32e689475eb42fccd572c72695 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
//===-- Implementation of strfromd ------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "src/stdlib/strfromd.h"
#include "src/__support/CPP/limits.h"
#include "src/__support/macros/config.h"
#include "src/stdio/printf_core/core_structs.h"
#include "src/stdio/printf_core/error_mapper.h"
#include "src/stdlib/str_from_util.h"
namespace LIBC_NAMESPACE_DECL {
LLVM_LIBC_FUNCTION(int, strfromd,
(char *__restrict s, size_t n, const char *__restrict format,
double fp)) {
LIBC_ASSERT(s != nullptr);
printf_core::FormatSection section =
internal::parse_format_string(format, fp);
printf_core::WriteBuffer<printf_core::Mode<
printf_core::WriteMode::FILL_BUFF_AND_DROP_OVERFLOW>::value>
wb(s, (n > 0 ? n - 1 : 0));
printf_core::Writer writer(wb);
int result = 0;
if (section.has_conv)
result = internal::strfromfloat_convert<double>(&writer, section);
else
result = writer.write(section.raw_string);
if (result < 0)
return result;
if (n > 0)
wb.buff[wb.buff_cur] = '\0';
if (writer.get_chars_written() >
static_cast<size_t>(cpp::numeric_limits<int>::max())) {
libc_errno =
printf_core::internal_error_to_errno(-printf_core::OVERFLOW_ERROR);
return -1;
}
return static_cast<int>(writer.get_chars_written());
}
} // namespace LIBC_NAMESPACE_DECL
|
