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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 _LIBCPP___OSTREAM_PRINT_H
#define _LIBCPP___OSTREAM_PRINT_H
#include <__config>
#include <__fwd/ostream.h>
#include <__iterator/ostreambuf_iterator.h>
#include <__ostream/basic_ostream.h>
#include <format>
#include <ios>
#include <locale>
#include <print>
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
# pragma GCC system_header
#endif
_LIBCPP_BEGIN_NAMESPACE_STD
#if _LIBCPP_STD_VER >= 23
template <class = void> // TODO PRINT template or availability markup fires too eagerly (http://llvm.org/PR61563).
_LIBCPP_HIDE_FROM_ABI inline void
__vprint_nonunicode(ostream& __os, string_view __fmt, format_args __args, bool __write_nl) {
// [ostream.formatted.print]/3
// Effects: Behaves as a formatted output function
// ([ostream.formatted.reqmts]) of os, except that:
// - failure to generate output is reported as specified below, and
// - any exception thrown by the call to vformat is propagated without regard
// to the value of os.exceptions() and without turning on ios_base::badbit
// in the error state of os.
// After constructing a sentry object, the function initializes an automatic
// variable via
// string out = vformat(os.getloc(), fmt, args);
ostream::sentry __s(__os);
if (__s) {
string __o = std::vformat(__os.getloc(), __fmt, __args);
if (__write_nl)
__o += '\n';
const char* __str = __o.data();
size_t __len = __o.size();
# ifndef _LIBCPP_HAS_NO_EXCEPTIONS
try {
# endif // _LIBCPP_HAS_NO_EXCEPTIONS
typedef ostreambuf_iterator<char> _Ip;
if (std::__pad_and_output(
_Ip(__os),
__str,
(__os.flags() & ios_base::adjustfield) == ios_base::left ? __str + __len : __str,
__str + __len,
__os,
__os.fill())
.failed())
__os.setstate(ios_base::badbit | ios_base::failbit);
# ifndef _LIBCPP_HAS_NO_EXCEPTIONS
} catch (...) {
__os.__set_badbit_and_consider_rethrow();
}
# endif // _LIBCPP_HAS_NO_EXCEPTIONS
}
}
template <class = void> // TODO PRINT template or availability markup fires too eagerly (http://llvm.org/PR61563).
_LIBCPP_HIDE_FROM_ABI inline void vprint_nonunicode(ostream& __os, string_view __fmt, format_args __args) {
std::__vprint_nonunicode(__os, __fmt, __args, false);
}
// Returns the FILE* associated with the __os.
// Returns a nullptr when no FILE* is associated with __os.
// This function is in the dylib since the type of the buffer associated
// with std::cout, std::cerr, and std::clog is only known in the dylib.
//
// This function implements part of the implementation-defined behavior
// of [ostream.formatted.print]/3
// If the function is vprint_unicode and os is a stream that refers to
// a terminal capable of displaying Unicode which is determined in an
// implementation-defined manner, writes out to the terminal using the
// native Unicode API;
// Whether the returned FILE* is "a terminal capable of displaying Unicode"
// is determined in the same way as the print(FILE*, ...) overloads.
_LIBCPP_EXPORTED_FROM_ABI FILE* __get_ostream_file(ostream& __os);
# ifndef _LIBCPP_HAS_NO_UNICODE
template <class = void> // TODO PRINT template or availability markup fires too eagerly (http://llvm.org/PR61563).
_LIBCPP_HIDE_FROM_ABI void __vprint_unicode(ostream& __os, string_view __fmt, format_args __args, bool __write_nl) {
# if _LIBCPP_AVAILABILITY_HAS_PRINT == 0
return std::__vprint_nonunicode(__os, __fmt, __args, __write_nl);
# else
FILE* __file = std::__get_ostream_file(__os);
if (!__file || !__print::__is_terminal(__file))
return std::__vprint_nonunicode(__os, __fmt, __args, __write_nl);
// [ostream.formatted.print]/3
// If the function is vprint_unicode and os is a stream that refers to a
// terminal capable of displaying Unicode which is determined in an
// implementation-defined manner, writes out to the terminal using the
// native Unicode API; if out contains invalid code units, the behavior is
// undefined and implementations are encouraged to diagnose it. If the
// native Unicode API is used, the function flushes os before writing out.
//
// This is the path for the native API, start with flushing.
__os.flush();
# ifndef _LIBCPP_HAS_NO_EXCEPTIONS
try {
# endif // _LIBCPP_HAS_NO_EXCEPTIONS
ostream::sentry __s(__os);
if (__s) {
# ifndef _LIBCPP_WIN32API
__print::__vprint_unicode_posix(__file, __fmt, __args, __write_nl, true);
# elif !defined(_LIBCPP_HAS_NO_WIDE_CHARACTERS)
__print::__vprint_unicode_windows(__file, __fmt, __args, __write_nl, true);
# else
# error "Windows builds with wchar_t disabled are not supported."
# endif
}
# ifndef _LIBCPP_HAS_NO_EXCEPTIONS
} catch (...) {
__os.__set_badbit_and_consider_rethrow();
}
# endif // _LIBCPP_HAS_NO_EXCEPTIONS
# endif // _LIBCPP_AVAILABILITY_HAS_PRINT
}
template <class = void> // TODO PRINT template or availability markup fires too eagerly (http://llvm.org/PR61563).
_LIBCPP_HIDE_FROM_ABI inline void vprint_unicode(ostream& __os, string_view __fmt, format_args __args) {
std::__vprint_unicode(__os, __fmt, __args, false);
}
# endif // _LIBCPP_HAS_NO_UNICODE
template <class... _Args>
_LIBCPP_HIDE_FROM_ABI void print(ostream& __os, format_string<_Args...> __fmt, _Args&&... __args) {
# ifndef _LIBCPP_HAS_NO_UNICODE
if constexpr (__print::__use_unicode_execution_charset)
std::__vprint_unicode(__os, __fmt.get(), std::make_format_args(__args...), false);
else
std::__vprint_nonunicode(__os, __fmt.get(), std::make_format_args(__args...), false);
# else // _LIBCPP_HAS_NO_UNICODE
std::__vprint_nonunicode(__os, __fmt.get(), std::make_format_args(__args...), false);
# endif // _LIBCPP_HAS_NO_UNICODE
}
template <class... _Args>
_LIBCPP_HIDE_FROM_ABI void println(ostream& __os, format_string<_Args...> __fmt, _Args&&... __args) {
# ifndef _LIBCPP_HAS_NO_UNICODE
// Note the wording in the Standard is inefficient. The output of
// std::format is a std::string which is then copied. This solution
// just appends a newline at the end of the output.
if constexpr (__print::__use_unicode_execution_charset)
std::__vprint_unicode(__os, __fmt.get(), std::make_format_args(__args...), true);
else
std::__vprint_nonunicode(__os, __fmt.get(), std::make_format_args(__args...), true);
# else // _LIBCPP_HAS_NO_UNICODE
std::__vprint_nonunicode(__os, __fmt.get(), std::make_format_args(__args...), true);
# endif // _LIBCPP_HAS_NO_UNICODE
}
template <class = void> // TODO PRINT template or availability markup fires too eagerly (http://llvm.org/PR61563).
_LIBCPP_HIDE_FROM_ABI inline void println(ostream& __os) {
std::print(__os, "\n");
}
#endif // _LIBCPP_STD_VER >= 23
_LIBCPP_END_NAMESPACE_STD
#endif // _LIBCPP___OSTREAM_PRINT_H
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