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 /* Walk streams and run operations on them 25 ** 26 ** Written by Kiem-Phong Vo. 27 */ 28 29 #if __STD_C 30 int sfwalk(Sfwalk_f walkf, Void_t* data, int type) 31 #else 32 int sfwalk(walkf, data, type) 33 Sfwalk_f walkf; /* return <0: stop, >=0: continue */ 34 Void_t* data; 35 int type; /* walk streams with all given flags */ 36 #endif 37 { 38 Sfpool_t *p; 39 Sfio_t *f; 40 int n, rv; 41 42 /* truly initializing std-streams before walking */ 43 if(sfstdin->mode & SF_INIT) 44 _sfmode(sfstdin, (sfstdin->mode & SF_RDWR), 0); 45 if(sfstdout->mode & SF_INIT) 46 _sfmode(sfstdout, (sfstdout->mode & SF_RDWR), 0); 47 if(sfstderr->mode & SF_INIT) 48 _sfmode(sfstderr, (sfstderr->mode & SF_RDWR), 0); 49 50 for(rv = 0, p = &_Sfpool; p; p = p->next) 51 { for(n = 0; n < p->n_sf; ) 52 { f = p->sf[n]; 53 54 if(type != 0 && (f->_flags&type) != type ) 55 continue; /* not in the interested set */ 56 57 if((rv = (*walkf)(f, data)) < 0) 58 return rv; 59 60 if(p->sf[n] == f) /* move forward to next stream */ 61 n += 1; 62 /* else - a sfclose() was done on current stream */ 63 } 64 } 65 66 return rv; 67 } 68