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*                  Common Public License, Version 1.0                  *
7*                    by AT&T Intellectual Property                     *
8*                                                                      *
9*                A copy of the License is available at                 *
10*            http://www.opensource.org/licenses/cpl1.0.txt             *
11*         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
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
30int _sfputl(Sfio_t* f, Sflong_t v)
31#else
32int _sfputl(f,v)
33Sfio_t*		f;	/* write a portable long to this stream */
34Sflong_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		case 7 : *ps++ = *s++;
70		case 6 : *ps++ = *s++;
71		case 5 : *ps++ = *s++;
72		case 4 : *ps++ = *s++;
73		case 3 : *ps++ = *s++;
74		case 2 : *ps++ = *s++;
75		case 1 : *ps++ = *s++;
76		}
77		f->next = ps;
78	}
79
80	SFOPEN(f,0);
81	SFMTXRETURN(f, n);
82}
83