1da2e3ebdSchin /***********************************************************************
2da2e3ebdSchin * *
3da2e3ebdSchin * This software is part of the ast package *
4*b30d1939SAndy Fiddaman * Copyright (c) 1985-2011 AT&T Intellectual Property *
5da2e3ebdSchin * and is licensed under the *
6*b30d1939SAndy Fiddaman * Eclipse Public License, Version 1.0 *
77c2fbfb3SApril Chin * by AT&T Intellectual Property *
8da2e3ebdSchin * *
9da2e3ebdSchin * A copy of the License is available at *
10*b30d1939SAndy Fiddaman * http://www.eclipse.org/org/documents/epl-v10.html *
11*b30d1939SAndy Fiddaman * (with md5 checksum b35adb5213ca9657e911e9befb180842) *
12da2e3ebdSchin * *
13da2e3ebdSchin * Information and Software Systems Research *
14da2e3ebdSchin * AT&T Research *
15da2e3ebdSchin * Florham Park NJ *
16da2e3ebdSchin * *
17da2e3ebdSchin * Glenn Fowler <gsf@research.att.com> *
18da2e3ebdSchin * David Korn <dgk@research.att.com> *
19da2e3ebdSchin * Phong Vo <kpv@research.att.com> *
20da2e3ebdSchin * *
21da2e3ebdSchin ***********************************************************************/
22da2e3ebdSchin #include "sfhdr.h"
23da2e3ebdSchin
24da2e3ebdSchin /* Read an unsigned long value coded portably for a given range.
25da2e3ebdSchin **
26da2e3ebdSchin ** Written by Kiem-Phong Vo
27da2e3ebdSchin */
28da2e3ebdSchin
29da2e3ebdSchin #if __STD_C
sfgetm(Sfio_t * f,Sfulong_t m)307c2fbfb3SApril Chin Sfulong_t sfgetm(Sfio_t* f, Sfulong_t m)
31da2e3ebdSchin #else
32da2e3ebdSchin Sfulong_t sfgetm(f, m)
337c2fbfb3SApril Chin Sfio_t* f;
34da2e3ebdSchin Sfulong_t m;
35da2e3ebdSchin #endif
36da2e3ebdSchin {
37da2e3ebdSchin Sfulong_t v;
38da2e3ebdSchin reg uchar *s, *ends, c;
39da2e3ebdSchin reg int p;
407c2fbfb3SApril Chin SFMTXDECL(f);
41da2e3ebdSchin
427c2fbfb3SApril Chin SFMTXENTER(f, (Sfulong_t)(-1));
43da2e3ebdSchin
44da2e3ebdSchin if(f->mode != SF_READ && _sfmode(f,SF_READ,0) < 0)
45da2e3ebdSchin SFMTXRETURN(f, (Sfulong_t)(-1));
46da2e3ebdSchin
47da2e3ebdSchin SFLOCK(f,0);
48da2e3ebdSchin
49da2e3ebdSchin for(v = 0;; )
50da2e3ebdSchin { if(SFRPEEK(f,s,p) <= 0)
51da2e3ebdSchin { f->flags |= SF_ERROR;
52da2e3ebdSchin v = (Sfulong_t)(-1);
53da2e3ebdSchin goto done;
54da2e3ebdSchin }
55da2e3ebdSchin for(ends = s+p; s < ends;)
56da2e3ebdSchin { c = *s++;
57da2e3ebdSchin v = (v << SF_BBITS) | SFBVALUE(c);
58da2e3ebdSchin if((m >>= SF_BBITS) <= 0)
59da2e3ebdSchin { f->next = s;
60da2e3ebdSchin goto done;
61da2e3ebdSchin }
62da2e3ebdSchin }
63da2e3ebdSchin f->next = s;
64da2e3ebdSchin }
65da2e3ebdSchin done:
66da2e3ebdSchin SFOPEN(f,0);
67da2e3ebdSchin SFMTXRETURN(f, v);
68da2e3ebdSchin }
69