// -*- tab-width:4; c-file-style:"cc-mode" -*-



#include "dos2unix.h"

#include <iostream>

#include <cstdlib>

#define BUFLEN 8192



dos2unixbuf::dos2unixbuf(const char *filename, dos2unixbuf::openmode mode)

{

	inner.open(filename, mode);

	buffer = new char [BUFLEN + 1] + 1;

}



dos2unixbuf::~dos2unixbuf()

{

}



void dos2unixbuf::close()

{

	delete [] (buffer - 1);

	inner.close(); 

}



int dos2unixbuf::overflow(int c) 

{

	return c != EOF ? inner.sputc(c) : EOF;

}



int dos2unixbuf::underflow() 

{

	if (gptr() < egptr())

		return * (unsigned char *) gptr();



	char *b = buffer; 



	while (b < buffer + BUFLEN) { 

		int ch = inner.sbumpc();

		

		if (ch == '\r') 

			continue;

		else if (ch == EOF) 

			break;

		else 

			*b++ = ch;

	}



	setg(NULL, buffer, b); 



	if (b == buffer) 

		return EOF;

	else 

		return *(unsigned char *) buffer;

}



int dos2unixbuf::uflow() {

	int ch = underflow();

	if (ch != EOF) {

		stossc();

		return ch;

	}

	else

		return ch;

}

	

int dos2unixbuf::pbackfail(int c) {

	if (gptr() > base()) {

		setg(NULL, gptr() - 1, egptr());

		return c;

	} 

	else

		return EOF;

}



int dos2unixbuf::sync() {

	return inner.sync();

}



void idos2unixstream::close()

{

	dos2unixbuf *buf = (dos2unixbuf *) rdbuf();

	buf->close();

}



idos2unixstream::~idos2unixstream()

{

	delete rdbuf();

}