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/* The following code declares classes to read from and write to
* file descriptore or file handles.
*
* See
* http://www.josuttis.com/cppcode
* for details and the latest version.
*
* - open:
* - integrating BUFSIZ on some systems?
* - optimized reading of multiple characters
* - stream for reading AND writing
* - i18n
*
* (C) Copyright Nicolai M. Josuttis 2001.
* Permission to copy, use, modify, sell and distribute this software
* is granted provided this copyright notice appears in all copies.
* This software is provided "as is" without express or implied
* warranty, and with no claim as to its suitability for any purpose.
*
* Version: Jul 28, 2002
* History:
* Jul 28, 2002: bugfix memcpy() => memmove()
* fdinbuf::underflow(): cast for return statements
* Aug 05, 2001: first public version
*/
#ifndef INCLUDE_FDOSTREAM_H
#define INCLUDE_FDOSTREAM_H
#include <ostream>
#include <streambuf>
// for EOF:
#include <cstdio>
// low-level read and write functions
#include <unistd.h>
// BEGIN namespace BOOST
namespace boost {
/************************************************************
* fdostream
* - a stream that writes on a file descriptor
************************************************************/
class fdoutbuf : public std::streambuf {
public:
int fd; // file descriptor
// constructor
fdoutbuf (int _fd) : fd(_fd) {
}
protected:
// write one character
virtual int_type overflow (int_type c) {
if (c != EOF) {
char z = c;
if (write (fd, &z, 1) != 1) {
return EOF;
}
}
return c;
}
// write multiple characters
virtual
std::streamsize xsputn (const char* s,
std::streamsize num) {
return write(fd,s,num);
}
};
class fdostream : public std::ostream {
protected:
fdoutbuf buf;
public:
fdostream () : std::ostream(0), buf(-1) {
}
fdostream (int fd) : std::ostream(0), buf(fd) {
rdbuf(&buf);
}
void setfd (int _fd) {
buf.fd = _fd;
rdbuf(&buf);
}
};
}
#endif // INCLUDE_FDOSTREAM_H
// End of Nicolai M. Josuttis code
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