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/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
file LICENSE.rst or https://cmake.org/licensing for details. */
#pragma once
#include "cmConfigure.h" // IWYU pragma: keep
#include <cstdio>
#include <iosfwd>
namespace cm {
namespace StdIo {
/**
* Identify the kind of terminal to which a stream is attached, if any.
*/
enum class TermKind
{
/** Not an interactive terminal. */
None,
/** A VT100 terminal. */
VT100,
#ifdef _WIN32
/** A Windows Console that does not support VT100 sequences. */
Console,
#endif
};
/**
* Represent stdin, stdout, or stderr stream metadata.
*/
class Stream
{
public:
/** The kind of terminal to which the stream is attached, if any. */
TermKind Kind() const { return this->Kind_; }
/** The underlying C++ stream. */
std::ios& IOS() const { return this->IOS_; }
/** The underlying file descriptor. */
int FD() const { return this->FD_; }
#ifdef _WIN32
/** The underlying HANDLE of an attached Windows Console, if any. */
void* Console() const { return this->Console_; }
#endif
protected:
enum class Direction
{
In,
Out,
};
Stream(std::ios& s, FILE* file, Direction direction);
~Stream(); // NOLINT(performance-trivially-destructible)
private:
std::ios& IOS_;
int FD_ = -1;
TermKind Kind_ = TermKind::None;
#ifdef _WIN32
void* Console_ = nullptr;
unsigned long ConsoleOrigMode_ = 0;
#endif
};
/**
* Represent stdin metadata.
*/
class IStream : public Stream
{
friend class Globals;
IStream(std::istream& is, FILE* file);
public:
/** The underlying C++ stream. */
std::istream& IOS() const;
};
/**
* Represent stdout or stderr metadata.
*/
class OStream : public Stream
{
friend class Globals;
OStream(std::ostream& os, FILE* file);
public:
/** The underlying C++ stream. */
std::ostream& IOS() const;
};
/** Metadata for stdin. */
IStream& In();
/** Metadata for stdout. */
OStream& Out();
/** Metadata for stderr. */
OStream& Err();
}
}
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