1 /*********************************************************************** 2 * * 3 * This software is part of the ast package * 4 * Copyright (c) 1985-2008 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 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