sfflsbuf.c revision 7c2fbfb345896881c631598ee3852ce9ce33fb07
/***********************************************************************
* *
* This software is part of the ast package *
* Copyright (c) 1985-2008 AT&T Intellectual Property *
* and is licensed under the *
* Common Public License, Version 1.0 *
* by AT&T Intellectual Property *
* *
* A copy of the License is available at *
* (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) *
* *
* Information and Software Systems Research *
* AT&T Research *
* Florham Park NJ *
* *
* Glenn Fowler <gsf@research.att.com> *
* David Korn <dgk@research.att.com> *
* Phong Vo <kpv@research.att.com> *
* *
***********************************************************************/
#include "sfhdr.h"
/* Write a buffer out to a file descriptor or
** extending a buffer for a SF_STRING stream.
**
** Written by Kiem-Phong Vo
*/
#if __STD_C
#else
int _sfflsbuf(f,c)
Sfio_t* f; /* write out the buffered content of this stream */
int c; /* if c>=0, c is also written out */
#endif
{
ssize_t n, w;
int inpc = c;
SFMTXDECL(f);
SFMTXENTER(f,-1);
{ /* check stream mode */
SFMTXRETURN(f, -1);
/* current data extent */
{ /* extend string stream buffer */
/* !(f->flags&SF_STRING) is required because exception
handlers may turn a string stream to a file stream */
else
SFMTXRETURN(f, -1);
}
}
if(c >= 0)
{ /* write into buffer */
{ *f->next++ = c;
if(c == '\n' &&
{ c = -1;
n += 1;
}
else break;
}
else if(n == 0)
{ /* unbuffered io */
c = -1;
n = 1;
}
}
break;
{ if((n -= w) > 0) /* save unwritten data, then resume */
if(c < 0 && (!isall || n == 0))
break;
}
else if(w == 0)
SFMTXRETURN(f, -1);
}
else if(c < 0)
break;
}
if(inpc < 0)
SFMTXRETURN(f,inpc);
}