//
// Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
//
// The contents of this file are covered under the licence agreement in the
// file "LICENCE" distributed with Cforall.
//
// iostream --
//
// Author           : Peter A. Buhr
// Created On       : Wed May 27 17:56:53 2015
// Last Modified By : Peter A. Buhr
// Last Modified On : Sat Aug 11 08:22:49 2018
// Update Count     : 156
//

#pragma once

#include "iterator"

trait ostream( dtype ostype ) {
	// private
	bool sepPrt( ostype & );							// return separator state (on/off)
	void sepReset( ostype & );							// set separator state to default state
	void sepReset( ostype &, bool );					// set separator and default state
	const char * sepGetCur( ostype & );					// get current separator string
	void sepSetCur( ostype &, const char * );			// set current separator string
	bool getNL( ostype & );							// check newline
	void setNL( ostype &, bool );						// saw newline
	// public
	void sepOn( ostype & );								// turn separator state on
	void sepOff( ostype & );							// turn separator state off
	bool sepDisable( ostype & );						// set default state to off, and return previous state
	bool sepEnable( ostype & );						// set default state to on, and return previous state

	const char * sepGet( ostype & );					// get separator string
	void sepSet( ostype &, const char * );				// set separator to string (15 character maximum)
	const char * sepGetTuple( ostype & );				// get tuple separator string
	void sepSetTuple( ostype &, const char * );			// set tuple separator to string (15 character maximum)

	int fail( ostype & );
	int flush( ostype & );
	void open( ostype & os, const char * name, const char * mode );
	void close( ostype & os );
	ostype & write( ostype &, const char *, size_t );
	int fmt( ostype &, const char fmt[], ... );
}; // ostream

// trait writeable( otype T ) {
// 	forall( dtype ostype | ostream( ostype ) ) ostype & ?|?( ostype &, T );
// }; // writeable

trait writeable( otype T, dtype ostype | ostream( ostype ) ) {
	ostype & ?|?( ostype &, T );
}; // writeable

// implement writable for intrinsic types

forall( dtype ostype | ostream( ostype ) ) {
	ostype & ?|?( ostype &, bool );

	ostype & ?|?( ostype &, char );
	ostype & ?|?( ostype &, signed char );
	ostype & ?|?( ostype &, unsigned char );

	ostype & ?|?( ostype &, short int );
	ostype & ?|?( ostype &, unsigned short int );
	ostype & ?|?( ostype &, int );
	ostype & ?|?( ostype &, unsigned int );
	ostype & ?|?( ostype &, long int );
	ostype & ?|?( ostype &, long long int );
	ostype & ?|?( ostype &, unsigned long int );
	ostype & ?|?( ostype &, unsigned long long int );

	ostype & ?|?( ostype &, float ); // FIX ME: should not be required
	ostype & ?|?( ostype &, double );
	ostype & ?|?( ostype &, long double );

	ostype & ?|?( ostype &, float _Complex );
	ostype & ?|?( ostype &, double _Complex );
	ostype & ?|?( ostype &, long double _Complex );

	ostype & ?|?( ostype &, const char * );
	// ostype & ?|?( ostype &, const char16_t * );
#if ! ( __ARM_ARCH_ISA_ARM == 1 && __ARM_32BIT_STATE == 1 ) // char32_t == wchar_t => ambiguous
	// ostype & ?|?( ostype &, const char32_t * );
#endif // ! ( __ARM_ARCH_ISA_ARM == 1 && __ARM_32BIT_STATE == 1 )
	// ostype & ?|?( ostype &, const wchar_t * );
	ostype & ?|?( ostype &, const void * );

	// manipulators
	ostype & ?|?( ostype &, ostype & (*)( ostype & ) );
	ostype & endl( ostype & );
	ostype & sep( ostype & );
	ostype & sepTuple( ostype & );
	ostype & sepOn( ostype & );
	ostype & sepOff( ostype & );
	ostype & sepDisable( ostype & );
	ostype & sepEnable( ostype & );
} // distribution

// tuples
forall( dtype ostype, otype T, ttype Params | writeable( T, ostype ) | { ostype & ?|?( ostype &, Params ); } )
ostype & ?|?( ostype & os, T arg, Params rest );

// writes the range [begin, end) to the given stream
forall( dtype ostype, otype elt_type | writeable( elt_type, ostype ), otype iterator_type | iterator( iterator_type, elt_type ) )
void write( iterator_type begin, iterator_type end, ostype & os );

forall( dtype ostype, otype elt_type | writeable( elt_type, ostype ), otype iterator_type | iterator( iterator_type, elt_type ) )
void write_reverse( iterator_type begin, iterator_type end, ostype & os );

//---------------------------------------

trait istream( dtype istype ) {
	int fail( istype & );
	int eof( istype & );
	void open( istype & is, const char * name );
	void close( istype & is );
	istype & read( istype &, char *, size_t );
	istype & ungetc( istype &, char );
	int fmt( istype &, const char fmt[], ... );
}; // istream

trait readable( otype T ) {
	forall( dtype istype | istream( istype ) ) istype & ?|?( istype &, T );
}; // readable

forall( dtype istype | istream( istype ) ) {
	istype & ?|?( istype &, bool & );

	istype & ?|?( istype &, char & );
	istype & ?|?( istype &, signed char & );
	istype & ?|?( istype &, unsigned char & );

	istype & ?|?( istype &, short int & );
	istype & ?|?( istype &, unsigned short int & );
	istype & ?|?( istype &, int & );
	istype & ?|?( istype &, unsigned int & );
	istype & ?|?( istype &, long int & );
	istype & ?|?( istype &, long long int & );
	istype & ?|?( istype &, unsigned long int & );
	istype & ?|?( istype &, unsigned long long int & );

	istype & ?|?( istype &, float & );
	istype & ?|?( istype &, double & );
	istype & ?|?( istype &, long double & );

	istype & ?|?( istype &, float _Complex & );
	istype & ?|?( istype &, double _Complex & );
	istype & ?|?( istype &, long double _Complex & );

	// manipulators
	istype & ?|?( istype &, istype & (*)( istype & ) );
	istype & endl( istype & is );
} // distribution

struct _Istream_cstrUC { char * s; };
_Istream_cstrUC cstr( char * );
forall( dtype istype | istream( istype ) ) istype & ?|?( istype &, _Istream_cstrUC );

struct _Istream_cstrC { char * s; int size; };
_Istream_cstrC cstr( char *, int size );
forall( dtype istype | istream( istype ) ) istype & ?|?( istype &, _Istream_cstrC );


#include <time_t.h>										// Duration (constructors) / Time (constructors)

forall( dtype ostype | ostream( ostype ) ) ostype & ?|?( ostype & os, Duration dur );
forall( dtype ostype | ostream( ostype ) ) ostype & ?|?( ostype & os, Time time );


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