1 /***********************************************************************
2 * *
3 * This software is part of the ast package *
4 * Copyright (c) 1985-2010 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
_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 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