/***********************************************************************
* *
* This software is part of the ast package *
* Copyright (c) 1985-2011 AT&T Intellectual Property *
* and is licensed under the *
* Eclipse Public License, Version 1.0 *
* by AT&T Intellectual Property *
* *
* A copy of the License is available at *
* http://www.eclipse.org/org/documents/epl-v10.html *
* (with md5 checksum b35adb5213ca9657e911e9befb180842) *
* *
* 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"
/* Read a long value coded in a portable format.
**
** Written by Kiem-Phong Vo
*/
#if __STD_C
Sflong_t sfgetl(Sfio_t* f)
#else
Sflong_t sfgetl(f)
Sfio_t* f;
#endif
{
Sflong_t v;
uchar *s, *ends, c;
int p;
SFMTXDECL(f); /* declare a local stream variable for multithreading */
SFMTXENTER(f,(Sflong_t)(-1));
if(f->mode != SF_READ && _sfmode(f,SF_READ,0) < 0)
SFMTXRETURN(f, (Sflong_t)(-1));
SFLOCK(f,0);
for(v = 0;;)
{ if(SFRPEEK(f,s,p) <= 0)
{ f->flags |= SF_ERROR;
v = (Sflong_t)(-1);
goto done;
}
for(ends = s+p; s < ends;)
{ c = *s++;
if(c&SF_MORE)
v = ((Sfulong_t)v << SF_UBITS) | SFUVALUE(c);
else
{ /* special translation for this byte */
v = ((Sfulong_t)v << SF_SBITS) | SFSVALUE(c);
f->next = s;
v = (c&SF_SIGN) ? -v-1 : v;
goto done;
}
}
f->next = s;
}
done :
SFOPEN(f,0);
SFMTXRETURN(f, v);
}