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//===----------------------------------------------------------------------===////
//
// 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
//
//===----------------------------------------------------------------------===////
#ifndef FILESYSTEM_FORMAT_STRING_H
#define FILESYSTEM_FORMAT_STRING_H
#include <__assert>
#include <__config>
#include <array>
#include <cstdarg>
#include <cstddef>
#include <cstdio>
#include <string>
#if defined(_LIBCPP_WIN32API)
# define PATHSTR(x) (L##x)
# define PATH_CSTR_FMT "\"%ls\""
#else
# define PATHSTR(x) (x)
# define PATH_CSTR_FMT "\"%s\""
#endif
_LIBCPP_BEGIN_NAMESPACE_FILESYSTEM
namespace detail {
inline _LIBCPP_ATTRIBUTE_FORMAT(__printf__, 1, 0) string vformat_string(const char* msg, va_list ap) {
array<char, 256> buf;
va_list apcopy;
va_copy(apcopy, ap);
int ret = ::vsnprintf(buf.data(), buf.size(), msg, apcopy);
va_end(apcopy);
string result;
if (static_cast<size_t>(ret) < buf.size()) {
result.assign(buf.data(), static_cast<size_t>(ret));
} else {
// we did not provide a long enough buffer on our first attempt. The
// return value is the number of bytes (excluding the null byte) that are
// needed for formatting.
size_t size_with_null = static_cast<size_t>(ret) + 1;
result.__resize_default_init(size_with_null - 1);
ret = ::vsnprintf(&result[0], size_with_null, msg, ap);
_LIBCPP_ASSERT_UNCATEGORIZED(static_cast<size_t>(ret) == (size_with_null - 1), "TODO");
}
return result;
}
inline _LIBCPP_ATTRIBUTE_FORMAT(__printf__, 1, 2) string format_string(const char* msg, ...) {
string ret;
va_list ap;
va_start(ap, msg);
#ifndef _LIBCPP_HAS_NO_EXCEPTIONS
try {
#endif // _LIBCPP_HAS_NO_EXCEPTIONS
ret = detail::vformat_string(msg, ap);
#ifndef _LIBCPP_HAS_NO_EXCEPTIONS
} catch (...) {
va_end(ap);
throw;
}
#endif // _LIBCPP_HAS_NO_EXCEPTIONS
va_end(ap);
return ret;
}
} // end namespace detail
_LIBCPP_END_NAMESPACE_FILESYSTEM
#endif // FILESYSTEM_FORMAT_STRING_H
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