- /* @(#)getav0.c 1.9 99/09/11 Copyright 1985 J. Schilling */
- #ifndef lint
- static char sccsid[] =
- "@(#)getav0.c 1.9 99/09/11 Copyright 1985 J. Schilling";
- #endif
- /*
- * Get arg vector by scanning the stack
- *
- * Copyright (c) 1985 J. Schilling
- */
- /*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; see the file COPYING. If not, write to
- * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
- */
- #include <mconfig.h>
- #include <sigblk.h>
- #include <avoffset.h>
- #include <standard.h>
- #if !defined(AV_OFFSET) || !defined(FP_INDIR)
- # ifdef HAVE_SCANSTACK
- # undef HAVE_SCANSTACK
- # endif
- #endif
- #ifdef NO_SCANSTACK
- # ifdef HAVE_SCANSTACK
- # undef HAVE_SCANSTACK
- # endif
- #endif
- #ifdef HAVE_SCANSTACK
- #include <stkframe.h>
- #define is_even(p) ((((long)(p)) & 1) == 0)
- #define even(p) (((long)(p)) & ~1L)
- #ifdef __future__
- #define even(p) (((long)(p)) - 1)/* will this work with 64 bit ?? */
- #endif
- char **getavp()
- {
- register struct frame *fp;
- register struct frame *ofp;
- char **av;
- #if FP_INDIR > 0
- register int i = 0;
- #endif
- ofp = fp = (struct frame *)getfp();
- while (fp) {
- #if FP_INDIR > 0
- i++;
- #endif
- ofp = fp;
- if (!is_even(fp->fr_savfp)) {
- fp = (struct frame *)even(fp->fr_savfp);
- fp = (struct frame *)((SIGBLK *)fp)->sb_savfp;
- continue;
- }
- fp = fp->fr_savfp;
- }
- #if FP_INDIR > 0
- i -= FP_INDIR;
- ofp = fp = (struct frame *)getfp();
- while (fp) {
- if (--i < 0)
- break;
- ofp = fp;
- if (!is_even(fp->fr_savfp)) {
- fp = (struct frame *)even(fp->fr_savfp);
- fp = (struct frame *)((SIGBLK *)fp)->sb_savfp;
- continue;
- }
- fp = fp->fr_savfp;
- }
- #endif
- av = (char **)ofp + AV_OFFSET; /* aus avoffset.h */
- /* (wird generiert mit av_offset) */
- return (av);
- }
- char *getav0()
- {
- return (getavp()[0]);
- }
- #else
- char *getav0()
- {
- return ("???");
- }
- #endif /* HAVE_SCANSTACK */