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// license:GPL-2.0+
// copyright-holders:Couriersud
/*
 * palloc.h
 *
 */

#ifndef PEXCEPTION_H_
#define PEXCEPTION_H_

#include <exception>

#include "pstring.h"
#include "ptypes.h"

namespace plib {
//============================================================
//  exception base
//============================================================

class pexception : public std::exception
{
public:
	explicit pexception(const pstring &text);

	const pstring &text() { return m_text; }
	const char* what() const noexcept override { return m_text.c_str(); }

private:
	pstring m_text;
};

class file_e : public plib::pexception
{
public:
	file_e(const pstring &fmt, const pstring &filename);
};

class file_open_e : public file_e
{
public:
	explicit file_open_e(const pstring &filename);
};

class file_read_e : public file_e
{
public:
	explicit file_read_e(const pstring &filename);
};

class file_write_e : public file_e
{
public:
	explicit file_write_e(const pstring &filename);
};

class null_argument_e : public plib::pexception
{
public:
	explicit null_argument_e(const pstring &argument);
};

class out_of_mem_e : public plib::pexception
{
public:
	explicit out_of_mem_e(const pstring &location);
};

/* FIXME: currently only a stub for later use. More use could be added by
 * using “-fnon-call-exceptions" and sigaction to enable c++ exception supported.
 */

class fpexception_e : public pexception
{
public:
	explicit fpexception_e(const pstring &text);
};

static constexpr unsigned FP_INEXACT = 0x0001;
static constexpr unsigned FP_DIVBYZERO = 0x0002;
static constexpr unsigned FP_UNDERFLOW = 0x0004;
static constexpr unsigned FP_OVERFLOW = 0x0008;
static constexpr unsigned FP_INVALID = 0x00010;
static constexpr unsigned FP_ALL = 0x0001f;

/*
 * Catch SIGFPE on linux for debugging purposes.
 */

class fpsignalenabler
{
public:
	explicit fpsignalenabler(unsigned fpexceptions);

	COPYASSIGNMOVE(fpsignalenabler, delete)

	~fpsignalenabler();

	/* is the functionality supported ? */
	static bool supported();
	/* returns last global enable state */
	static bool global_enable(bool enable);

private:
	int m_last_enabled;

	static bool m_enable;
};


} // namespace plib

#endif /* PEXCEPTION_H_ */