1*4887Schin /*********************************************************************** 2*4887Schin * * 3*4887Schin * This software is part of the ast package * 4*4887Schin * Copyright (c) 1985-2007 AT&T Knowledge Ventures * 5*4887Schin * and is licensed under the * 6*4887Schin * Common Public License, Version 1.0 * 7*4887Schin * by AT&T Knowledge Ventures * 8*4887Schin * * 9*4887Schin * A copy of the License is available at * 10*4887Schin * http://www.opensource.org/licenses/cpl1.0.txt * 11*4887Schin * (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) * 12*4887Schin * * 13*4887Schin * Information and Software Systems Research * 14*4887Schin * AT&T Research * 15*4887Schin * Florham Park NJ * 16*4887Schin * * 17*4887Schin * Glenn Fowler <gsf@research.att.com> * 18*4887Schin * David Korn <dgk@research.att.com> * 19*4887Schin * Phong Vo <kpv@research.att.com> * 20*4887Schin * * 21*4887Schin ***********************************************************************/ 22*4887Schin #include "sfhdr.h" 23*4887Schin 24*4887Schin /* Read a long value coded in a portable format. 25*4887Schin ** 26*4887Schin ** Written by Kiem-Phong Vo 27*4887Schin */ 28*4887Schin 29*4887Schin #if __STD_C 30*4887Schin Sflong_t sfgetl(reg Sfio_t* f) 31*4887Schin #else 32*4887Schin Sflong_t sfgetl(f) 33*4887Schin reg Sfio_t* f; 34*4887Schin #endif 35*4887Schin { 36*4887Schin Sflong_t v; 37*4887Schin reg uchar *s, *ends, c; 38*4887Schin reg int p; 39*4887Schin 40*4887Schin SFMTXSTART(f,(Sflong_t)(-1)); 41*4887Schin 42*4887Schin if(f->mode != SF_READ && _sfmode(f,SF_READ,0) < 0) 43*4887Schin SFMTXRETURN(f, (Sflong_t)(-1)); 44*4887Schin SFLOCK(f,0); 45*4887Schin 46*4887Schin for(v = 0;;) 47*4887Schin { if(SFRPEEK(f,s,p) <= 0) 48*4887Schin { f->flags |= SF_ERROR; 49*4887Schin v = (Sflong_t)(-1); 50*4887Schin goto done; 51*4887Schin } 52*4887Schin for(ends = s+p; s < ends;) 53*4887Schin { c = *s++; 54*4887Schin if(c&SF_MORE) 55*4887Schin v = ((Sfulong_t)v << SF_UBITS) | SFUVALUE(c); 56*4887Schin else 57*4887Schin { /* special translation for this byte */ 58*4887Schin v = ((Sfulong_t)v << SF_SBITS) | SFSVALUE(c); 59*4887Schin f->next = s; 60*4887Schin v = (c&SF_SIGN) ? -v-1 : v; 61*4887Schin goto done; 62*4887Schin } 63*4887Schin } 64*4887Schin f->next = s; 65*4887Schin } 66*4887Schin done : 67*4887Schin SFOPEN(f,0); 68*4887Schin SFMTXRETURN(f, v); 69*4887Schin } 70