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/* Read an unsigned long value coded in a portable format. 25** 26** Written by Kiem-Phong Vo 27*/ 28 29#if __STD_C 30Sfulong_t sfgetu(Sfio_t* f) 31#else 32Sfulong_t sfgetu(f) 33Sfio_t* f; 34#endif 35{ 36 Sfulong_t v; 37 uchar *s, *ends, c; 38 int p; 39 SFMTXDECL(f); 40 41 SFMTXENTER(f, (Sfulong_t)(-1)); 42 43 if(f->mode != SF_READ && _sfmode(f,SF_READ,0) < 0) 44 SFMTXRETURN(f, (Sfulong_t)(-1)); 45 46 SFLOCK(f,0); 47 48 for(v = 0;;) 49 { if(SFRPEEK(f,s,p) <= 0) 50 { f->flags |= SF_ERROR; 51 v = (Sfulong_t)(-1); 52 goto done; 53 } 54 for(ends = s+p; s < ends;) 55 { c = *s++; 56 v = (v << SF_UBITS) | SFUVALUE(c); 57 if(!(c&SF_MORE)) 58 { f->next = s; 59 goto done; 60 } 61 } 62 f->next = s; 63 } 64done: 65 SFOPEN(f,0); 66 SFMTXRETURN(f, v); 67} 68