Imported Upstream version 93u+upstream

1 files changed, 79 insertions, 0 deletions

diff --git a/src/lib/libast/sfio/sfgetd.c b/src/lib/libast/sfio/sfgetd.c
new file mode 100644
index 0000000..8c885c9
--- /dev/null
+++ b/src/lib/libast/sfio/sfgetd.c
@@ -0,0 +1,79 @@
+/***********************************************************************
+*                                                                      *
+*               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 portably coded double value
+**
+**	Written by Kiem-Phong Vo
+*/
+
+#if __STD_C
+Sfdouble_t sfgetd(Sfio_t* f)
+#else
+Sfdouble_t sfgetd(f)
+Sfio_t*	f;
+#endif
+{
+	reg uchar	*s, *ends, c;
+	reg int		p, sign, exp;
+	Sfdouble_t	v;
+	SFMTXDECL(f); /* declare a local stream variable for multithreading */
+
+	SFMTXENTER(f,-1.);
+
+	if((sign = sfgetc(f)) < 0 || (exp = (int)sfgetu(f)) < 0)
+		SFMTXRETURN(f, -1.);
+
+	if(f->mode != SF_READ && _sfmode(f,SF_READ,0) < 0)
+		SFMTXRETURN(f, -1.);
+
+	SFLOCK(f,0);
+
+	v = 0.;
+	for(;;)
+	{	/* fast read for data */
+		if(SFRPEEK(f,s,p) <= 0)
+		{	f->flags |= SF_ERROR;
+			v = -1.;
+			goto done;
+		}
+
+		for(ends = s+p; s < ends; )
+		{	c = *s++;
+			v += SFUVALUE(c);
+			v = ldexpl(v,-SF_PRECIS);
+			if(!(c&SF_MORE))
+			{	f->next = s;
+				goto done;
+			}
+		}
+		f->next = s;
+	}
+
+done:
+	v = ldexpl(v,(sign&02) ? -exp : exp);
+	if(sign&01)
+		v = -v;
+
+	SFOPEN(f,0);
+	SFMTXRETURN(f, v);
+}