1 /***********************************************************************
2 *                                                                      *
3 *               This software is part of the ast package               *
4 *          Copyright (c) 1985-2011 AT&T Intellectual Property          *
5 *                      and is licensed under the                       *
6 *                 Eclipse Public License, Version 1.0                  *
7 *                    by AT&T Intellectual Property                     *
8 *                                                                      *
9 *                A copy of the License is available at                 *
10 *          http://www.eclipse.org/org/documents/epl-v10.html           *
11 *         (with md5 checksum b35adb5213ca9657e911e9befb180842)         *
12 *                                                                      *
13 *              Information and Software Systems Research               *
14 *                            AT&T Research                             *
15 *                           Florham Park NJ                            *
16 *                                                                      *
17 *                 Glenn Fowler <gsf@research.att.com>                  *
18 *                  David Korn <dgk@research.att.com>                   *
19 *                   Phong Vo <kpv@research.att.com>                    *
20 *                                                                      *
21 ***********************************************************************/
22 #include	"sfhdr.h"
23 
24 /*	Write out a long value in a portable format
25 **
26 **	Written by Kiem-Phong Vo.
27 */
28 
29 #if __STD_C
_sfputl(Sfio_t * f,Sflong_t v)30 int _sfputl(Sfio_t* f, Sflong_t v)
31 #else
32 int _sfputl(f,v)
33 Sfio_t*		f;	/* write a portable long to this stream */
34 Sflong_t	v;	/* the value to be written */
35 #endif
36 {
37 #define N_ARRAY		(2*sizeof(Sflong_t))
38 	reg uchar	*s, *ps;
39 	reg ssize_t	n, p;
40 	uchar		c[N_ARRAY];
41 	SFMTXDECL(f);
42 
43 	SFMTXENTER(f,-1);
44 	if(f->mode != SF_WRITE && _sfmode(f,SF_WRITE,0) < 0)
45 		SFMTXRETURN(f, -1);
46 	SFLOCK(f,0);
47 
48 	s = ps = &(c[N_ARRAY-1]);
49 	if(v < 0)
50 	{	/* add 1 to avoid 2-complement problems with -SF_MAXINT */
51 		v = -(v+1);
52 		*s = (uchar)(SFSVALUE(v) | SF_SIGN);
53 	}
54 	else	*s = (uchar)(SFSVALUE(v));
55 	v = (Sfulong_t)v >> SF_SBITS;
56 
57 	while(v > 0)
58 	{	*--s = (uchar)(SFUVALUE(v) | SF_MORE);
59 		v = (Sfulong_t)v >> SF_UBITS;
60 	}
61 	n = (ps-s)+1;
62 
63 	if(n > 8 || SFWPEEK(f,ps,p) < n)
64 		n = SFWRITE(f,(Void_t*)s,n); /* write the hard way */
65 	else
66 	{	switch(n)
67 		{
68 		case 8 : *ps++ = *s++;
69 		/* FALLTHROUGH */
70 		case 7 : *ps++ = *s++;
71 		/* FALLTHROUGH */
72 		case 6 : *ps++ = *s++;
73 		/* FALLTHROUGH */
74 		case 5 : *ps++ = *s++;
75 		/* FALLTHROUGH */
76 		case 4 : *ps++ = *s++;
77 		/* FALLTHROUGH */
78 		case 3 : *ps++ = *s++;
79 		/* FALLTHROUGH */
80 		case 2 : *ps++ = *s++;
81 		/* FALLTHROUGH */
82 		case 1 : *ps++ = *s++;
83 		}
84 		f->next = ps;
85 	}
86 
87 	SFOPEN(f,0);
88 	SFMTXRETURN(f, n);
89 }
90