678 lines
18 KiB
C
678 lines
18 KiB
C
/* SB - Copyright 1982 by Ken Harrenstien, SRI International
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* This software is quasi-public; it may be used freely with
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* like software, but may NOT be sold or made part of licensed
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* products without permission of the author. In all cases
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* the source code and any modifications thereto must remain
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* available to any user.
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*
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* This is part of the SB library package.
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* Any software using the SB library must likewise be made
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* quasi-public, with freely available sources.
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*/
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#define PRINT /* Include printout stuff */
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#include "sb.h"
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#include <stdio.h>
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extern struct smblk *sbm_nfl;
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extern struct smblk *sbm_list;
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extern struct sdblk *sbx_nfl;
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#ifdef PRINT
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#define PRF(stmt) {if(p) stmt;}
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#define PRFBUG(str,stmt) {if(p) stmt;else return(str);}
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#define PRFBAD(str,stmt) {if(p) stmt; return(str);}
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#else
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#define PRF(stmt) ;
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#define PRFBUG(str,stmt) return(str);
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#define PRFBAD(str,stmt) return(str);
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#endif
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#ifndef NPTRS
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#define NPTRS (1000) /* Catch loops of period less than this. */
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#endif
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int sbe_dec = 0; /* Set nonzero to use decimal printout */
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struct ptab {
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int pt_pflag; /* Printflag value */
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char *pt_err; /* Error string return */
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int pt_xerr; /* Error index return */
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int pt_hidx; /* Highest freelist entry */
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int pt_nsto; /* # entries stored in table */
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int pt_cnt; /* # of entry store attempts */
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struct smblk *pt_tab[NPTRS];
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};
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_PROTOTYPE( char *sbe_sdtab, (struct ptab *pt, int p, int phys) );
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_PROTOTYPE( char *sbe_schk, (struct sdblk *sd, struct ptab *pt) );
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_PROTOTYPE( int sbe_tbent, (struct ptab *pt, struct smblk *sm) );
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#define PTF_PRF 01 /* Do printout stuff */
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#define PTF_OVFERR 02 /* Complain if table overflows */
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#define PTF_SDPHYS 04 /* Follow SD phys links (else logical links) */
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struct flgt {
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int flg_bit;
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int flg_chr;
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};
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_PROTOTYPE( char *sbe_fstr, (int flags, struct flgt *fp) );
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char *sbe_mvfy(), *sbe_mfl(), *sbe_mlst(); /* SBM */
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char *sbe_sbvfy(), *sbe_sbs(); /* SBBUF */
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char *sbe_svfy(), *sbe_sdlist(), *sbe_sdtab(), *sbe_schk(); /* SD */
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char *sbe_fstr(); /* Misc utility */
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/* SBE_MEM() - Print out memory usage list
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*/
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sbe_mem()
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{
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printf("\nMemory Usage:\n");
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printf("\tsbm_nfl : %6o\n",sbm_nfl);
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printf("\tsbm_list: %6o\n",sbm_list);
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printf("\tsmblk nodes are %o bytes long.\n",sizeof (struct smblk));
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sbe_mlst(1); /* Scan mem list, printing stuff. */
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}
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/* SBE_MVFY() - Verify memory allocation structures
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* Returns error message (0 if no errors found).
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*/
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char *
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sbe_mvfy()
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{ register char *res;
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if((res = sbe_mfl(0))
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|| (res = sbe_mlst(0)))
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return(res);
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return(0);
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}
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/* SBM Debugging Routines */
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struct flgt smflgtab[] = {
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SM_USE, 'U',
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SM_NXM, 'N',
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SM_EXT, 'E',
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SM_MNODS,'M',
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SM_DNODS,'D',
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0,0
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};
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static char smfhelp[] = "U-Used, N-NXM, E-External, M-SMnodes, D-SDnodes";
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static char smhdline[] = "\
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SM: back smaddr smlen smuse smflags";
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/* SBE_MFL(printflag) - Verify/Print memory freelist
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* Returns error message (0 if no errors found).
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*/
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char *
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sbe_mfl(p)
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int p;
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{ register struct smblk *sm;
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register int i;
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struct ptab smtab; /* For loop detection */
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PRF(printf("Tracing SM node freelist --\n"))
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PRF(printf(" Maximum loop detection size is %d.", NPTRS))
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if((sm = sbm_nfl) == 0)
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{ PRF(printf("\n\tNo list.\n"))
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return(0); /* Null freelist is ok */
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}
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smtab.pt_pflag = p ? PTF_PRF : 0;
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smtab.pt_nsto = smtab.pt_cnt = 0;
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i = 0; /* Print 8 addrs/line */
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for(; sm; sm = sm->smforw)
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{
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PRF(printf("%s%7o->", (i==0 ? "\n " : ""), sm))
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if(++i >= 8) i = 0;
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if(sbe_tbent(&smtab, sm) < 0) /* If hit loop, stop */
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PRFBAD("SM freelist loop",
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printf("\nLOOP - %o seen as node %d!!\n",
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sm, smtab.pt_xerr))
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if(sm->smflags)
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{ PRF((i = 0, printf("\nFreelist node has flags:\n")))
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PRFBUG("Free SM flagged", sbe_smp(sm, 0))
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}
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}
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PRF(printf("\nEnd - %d nodes on SM freelist.\n", smtab.pt_cnt))
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return(0);
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}
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/* SBE_MLST(printflag) - Verify/Print allocated memory list.
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* Returns error message (0 if no errors found).
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*/
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char *
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sbe_mlst(p)
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int p;
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{ register struct smblk *sm, *smf, *smb;
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char *nextaddr = NULL;
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int i;
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struct ptab smtab; /* For loop detection */
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PRF(printf("Tracing mem list -- \n"))
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if((sm = sbm_list) == 0)
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{ PRF(printf("\tNo list?!\n"))
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if(sbm_nfl) /* Ensure rest are 0 too */
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return("No mem list?!!");
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return(0);
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}
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smtab.pt_pflag = p;
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smtab.pt_cnt = smtab.pt_nsto = 0;
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smb = 0;
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PRF(printf(" Flags: %s\n%s\n", smfhelp, smhdline))
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for(; sm; sm = smf)
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{ PRF(printf(" %6o: ",sm))
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if(sbe_tbent(&smtab, sm) < 0)
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PRFBAD("Loop in mem list!!",
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printf("LOOP - seen as node %d!!\n", smtab.pt_xerr))
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if(sm->smback == smb)
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PRF(printf("^ ")) /* Back ptr OK */
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else PRFBUG("Bad back ptr!",
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printf("%6o BAD Backptr!!\n\t ",sm->smback))
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if((sm->smflags&0377)!= SM_NID)
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PRFBUG("SM: bad node ID",
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printf("BAD - no node ID!\n\t "))
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PRF(printf((sm->smflags&SM_USE) ? " " : "FREE "))
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if(sm->smlen == 0)
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PRFBUG("SM: len 0",
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printf("Zero-length area!"))
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if((sm->smflags&SM_USE)==0
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&& rndrem(sm->smaddr - sbm_lowaddr))
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PRFBUG("Bad free-mem block",
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printf("Bad free-mem block"))
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PRF(sbe_smp(sm, 1)) /* Print out rest of info */
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if(nextaddr != sm->smaddr
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&& smtab.pt_cnt != 1) /* 1st time needs init */
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{ PRFBUG("Alignment error!",
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printf("\t BAD!! %6o expected; ",nextaddr))
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#if !(MINIX)
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PRF((i = sm->smaddr - nextaddr) > 0
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? printf("%d skipped.\n",i)
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: printf("%d overlapped.\n",-i))
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#endif
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}
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nextaddr = sm->smaddr + sm->smlen;
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smf = sm->smforw;
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smb = sm; /* Save ptr to back */
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}
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PRF(printf("End = %6o\n",nextaddr))
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return(0);
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}
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#ifdef PRINT
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sbe_smp(sm,type)
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register struct smblk *sm;
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int type;
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{
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if(type==0)
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printf(" %6o: %s ", sm,
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((sm->smflags&SM_USE) ? " " : "FREE"));
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printf("%6o: ", sm->smaddr);
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printf((sbe_dec ? "%5d. %5d." : "%6o %6o"), sm->smlen, sm->smuse);
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printf(" %7o = %s\n", sm->smflags, sbe_fstr(sm->smflags, smflgtab));
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}
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#endif /*PRINT*/
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/* SD (SBSTR) debugging routines */
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struct flgt sdflgtab[] = {
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SD_LOCK, 'L',
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SD_LCK2, 'T',
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SD_MOD, '*',
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0,0
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};
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static char sdfhelp[] = "\
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<f> flags: *-MOD (disk outofdate), L-LOCK, T-LCK2 (temp)";
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static char sdhdline[] = "\
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<f> SD: slforw slback sdflgs sdforw sdback sdmem sdfile sdaddr sdlen";
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/* SBE_SFL(printflag) - Verify/Print SD freelist
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* Returns error message (0 if no errors found).
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*/
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char *
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sbe_sfl(p)
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int p;
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{ register struct sdblk *sd;
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register int i;
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struct ptab sdtab; /* For loop detection */
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PRF(printf("Tracing SDBLK node freelist --\n"))
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PRF(printf(" Maximum loop detection size is %d.", NPTRS))
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if((sd = sbx_nfl) == 0)
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{ PRF(printf("\n\tNo list.\n"))
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return(0); /* Null freelist is ok */
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}
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sdtab.pt_pflag = p ? PTF_PRF : 0;
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sdtab.pt_nsto = sdtab.pt_cnt = 0;
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i = 0; /* Print 8 addrs/line */
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for(; sd; sd = sd->slforw)
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{
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PRF(printf("%s%7o->", (i==0 ? "\n " : ""), sd))
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if(++i >= 8) i = 0;
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if(sbe_tbent(&sdtab, sd) < 0) /* If hit loop, stop */
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PRFBAD("SD freelist loop",
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printf("\nLOOP - %o seen as node %d!!",
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sd, sdtab.pt_xerr))
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if(sd->sdflags)
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{ PRF((i = 0, printf("\nFreelist node has flags:\n")))
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PRFBUG("Free SD flagged", sbe_psd(sd))
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}
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}
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PRF(printf("\nEnd - %d nodes on SD freelist.\n", sdtab.pt_cnt))
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return(0);
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}
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/* SBE_SDS() - Print out all sdblk data stuff
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*/
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sbe_sds()
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{ int sbe_psd();
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printf("Printout of all in-use SDBLKs:\n");
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printf(" %s\n", sdfhelp);
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printf("%s\n", sdhdline);
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sbm_nfor(SM_DNODS,sizeof(struct sdblk),sbe_psd,0);
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printf("\n");
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}
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/* SBE_PSD - Auxiliary for invocation by SBE_SDS above. */
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sbe_psd(sd)
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register struct sdblk *sd;
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{ register int flags;
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flags = sd->sdflags;
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printf("%c%c%c",
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((flags&SD_MOD) ? '*' : ' '),
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((flags&SD_LOCK) ? 'L' : ' '),
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((flags&SD_LCK2) ? 'T' : ' '));
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printf(" %7o: %6o %6o %6o %6o %6o %6o %6o %7lo %5ld.\n", sd,
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sd->slforw, sd->slback, sd->sdflags,
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sd->sdforw, sd->sdback, sd->sdmem,
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sd->sdfile, sd->sdaddr, sd->sdlen);
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return(0);
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}
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/* SBE_SVFY() - Verify all SD blocks
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* Returns error message (0 if no errors found).
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*/
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char *
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sbe_svfy()
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{ register char *res;
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return((res = sbe_sdlist(0,0)) ? res : sbe_sdlist(0,1));
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}
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/* SBE_SDLIST(printflag, physflag) - Verify/Print all SD blocks.
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* Show logical lists if physflag 0
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* Show physical lists otherwise
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* Returns error message (0 if no errors found).
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*/
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char *
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sbe_sdlist(p,phys)
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int p, phys;
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{ register char *res;
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struct ptab sdtab; /* The SDLIST table to use */
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/* First put freelist in table, then scan for all
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* SD nodes. Each active node (not in table) gets
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* its entire list traced forward/backward and added to table.
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*/
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if(res = sbe_sdtab(&sdtab, p, phys)) /* Set up freelist table */
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return(res);
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/* Freelist entered in table, now scan all SD's */
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res = (char *)sbm_nfor(SM_DNODS,sizeof(struct sdblk),
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sbe_schk, &sdtab);
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PRF(printf("\n"))
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return(res);
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}
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/* SBE_SDTAB(tableptr, printflag, physflag) - Auxiliary for SBE_SDLIST.
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* Stuffs all freelist SDBLK addresses in table for dup detection.
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* Returns error message (0 if no errors found).
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*/
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char *
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sbe_sdtab(pt, p, phys)
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register struct ptab *pt;
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int p, phys;
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{ register struct sdblk *sd;
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pt->pt_pflag = (p ? PTF_PRF : 0) | (phys ? PTF_SDPHYS : 0)
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| PTF_OVFERR;
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pt->pt_cnt = pt->pt_nsto = 0; /* Initialize */
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/* Stick freelist in table */
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for(sd = sbx_nfl; sd; sd = sd->slforw)
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{ if(sbe_tbent(pt, sd) < 0)
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{ if(pt->pt_xerr < 0)
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PRFBAD("SD freelist too long",
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printf("SD freelist too long (%d)\n",
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NPTRS))
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PRFBAD("SD freelist loop",
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printf("SD freelist loop at %o\n", pt->pt_xerr))
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}
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if(sd->sdflags)
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{
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PRF(printf("Bad free SD, non-zero flag:\n"))
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PRFBUG("Free SD flagged", sbe_psd(sd))
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}
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}
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pt->pt_hidx = pt->pt_nsto; /* Set idx of 1st non-FL entry */
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return(0);
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}
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/* SBE_SCHK(SDptr, tableptr) - Auxiliary for SBE_SDLIST.
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* If SD not already in table, verifies or prints
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* the complete physical or logical list it's on, and enters all
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* of its SDs into table (to prevent doing it again).
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* Returns 0 if no errors, else error string.
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** There is a problem when the table overflows. The tbent routine
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** wants to add it (wrapping around at bottom) in that case, because
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** that still helps detect loops. But this routine wants to reset
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** the table back (after scanning to head of list) and once it starts
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** scanning forward again it will fail, because some of the SDs are
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** still in the table due to the wraparound! Thus PTF_OVFERR is always
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** set, in order to at least give the right error message.
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*/
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char *
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sbe_schk(sd, pt)
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register struct sdblk *sd;
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struct ptab *pt;
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{ register struct sdblk *sdx;
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register struct smblk *sm;
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struct sbfile *savfile;
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chroff lastaddr;
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int p, savidx, phys;
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phys = pt->pt_pflag&PTF_SDPHYS; /* Set up physflag */
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if(phys && (sd->sdfile == 0)) /* Ignore non-phys stuff if phys */
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return(0);
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p = pt->pt_pflag&PTF_PRF; /* Set up printflag */
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savidx = pt->pt_nsto; /* Remember initial extent of table */
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if(sbe_tbent(pt, sd) < 0)
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{ if(pt->pt_xerr >= 0) /* OK if already in table */
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return(0);
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PRFBAD("Too many SDs",
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printf("Too many SDs for table (%d)\n", NPTRS))
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}
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/* Now search backward for start of list */
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while(sdx = (phys ? sd->sdback : sd->slback))
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if(sbe_tbent(pt,sdx) >= 0)
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sd = sdx;
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else break;
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if(sdx)
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{ if(pt->pt_xerr < 0) /* Table error? */
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PRFBAD("Too many SDs",
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printf("Too many SDs for table (%d)\n",NPTRS))
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PRF(printf("Backlist loop!! Dup'd node:%s\n",
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(pt->pt_xerr < pt->pt_hidx) ?
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"(on freelist!)" : "" ))
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PRFBUG((phys ? "Phys SD loop" : "SD loop"), sbe_psd(sdx))
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}
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/* Reset table to flush nodes backed over */
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pt->pt_cnt = pt->pt_nsto = savidx;
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/* SD now points to start of list. Begin stepping thru list... */
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PRF(printf("---- %sList started: ", (phys ? "Phys " : "")))
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if(phys)
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{ savfile = sd->sdfile;
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PRF(printf(" SF: %o, fd= %d, ln= %ld\n",
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savfile,savfile->sffd,savfile->sflen))
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if(savfile->sfptr1 != sd)
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PRFBUG("SFPTR1 bad",
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printf(" BAD!! Sfptr1 %o doesn't match SD %o!!\n",
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savfile->sfptr1, sd))
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lastaddr = 0;
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}
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else PRF(printf("\n"))
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PRF(printf("%s\n", sdhdline))
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for(sdx = 0; sd; (sdx = sd, sd = (phys ? sd->sdforw : sd->slforw)))
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{
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PRF(sbe_psd(sd)) /* Print it out */
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if(sdx != (phys ? sd->sdback : sd->slback))
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{ if(phys)
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PRFBUG("PSD bad sdback",printf("\tBad phys backptr\n"))
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else
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PRFBUG("SD bad slback",printf("\tBad backptr\n"))
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}
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if((sd->sdflags&0377) != SD_NID)
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PRFBUG("Bad SD node ID", printf("\tBad node ID!\n"))
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if(sd->sdfile && (sd->sdlen < 0 || sd->sdaddr < 0))
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PRFBUG("SD: neg len/addr",
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printf("\tNeg disk len/addr\n"))
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if(phys) goto dophys;
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/* Do special stuff for logical list */
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if(sm = sd->sdmem)
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{ if((sm->smflags&0377) != SM_NID)
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PRFBUG("SD: bad SM",
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printf("\nBad SMBLK ptr\n"))
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if((sd->sdflags&SD_MOD)==0
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&& sd->sdlen != sm->smuse)
|
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PRFBUG("SD != SM",
|
||
printf("\tBad SMBLK? Len conflict\n"))
|
||
if(sm->smlen < sm->smuse)
|
||
PRFBUG("SD: SM len < use",
|
||
printf("\tBad SMBLK, len < use\n"))
|
||
}
|
||
goto doboth; /* Skip phys stuff */
|
||
|
||
/* Do special stuff for phys list */
|
||
dophys: if(sd->sdfile != savfile)
|
||
PRFBUG("SD: bad sdfile",
|
||
printf("\tBad sdfile ptr! Shd be %o\n",
|
||
savfile))
|
||
if(sd->sdaddr < lastaddr)
|
||
PRFBUG("SD addr out of order",
|
||
printf("\tBad disk addr, not in order!\n"))
|
||
lastaddr = sd->sdaddr;
|
||
/* Done with special phys stuff */
|
||
|
||
doboth: if(sbe_tbent(pt, sd) < 0)
|
||
{ if(pt->pt_xerr < 0)
|
||
PRFBAD("Too many SDs",
|
||
printf("Too many SDs for table (%d)\n",NPTRS))
|
||
|
||
PRFBUG("SD loop",
|
||
printf("\tLOOP!! This SD already seen%s.\n",
|
||
(pt->pt_xerr < pt->pt_hidx) ?
|
||
" (on freelist!)" : "" ))
|
||
break;
|
||
}
|
||
}
|
||
PRF(printf("-----------\n"))
|
||
return(0);
|
||
}
|
||
|
||
/* SBE_DSK(SFptr) - Print out disk usage list for specific file
|
||
*/
|
||
|
||
sbe_dsk(sfp)
|
||
SBFILE *sfp;
|
||
{
|
||
printf("SBFILE printout not coded: %o\n",sfp);
|
||
}
|
||
|
||
/* SBBUF structure debugging routines */
|
||
|
||
struct flgt sbflgtab[] = {
|
||
SB_OVW, 'O',
|
||
SB_WRIT,'W',
|
||
0,0
|
||
};
|
||
static char sbfhelp[] = "O-Overwrite, W-Write";
|
||
|
||
/* SBE_SBVFY(SBptr) - Verify a SB-string.
|
||
* Returns error message (0 if no errors found).
|
||
*/
|
||
char *
|
||
sbe_sbvfy(sbp)
|
||
SBBUF *sbp;
|
||
{ return(sbe_sbs(sbp,0));
|
||
}
|
||
|
||
/* SBE_SBS(SBptr, printflag) - Verify/Print SBSTR data stuff
|
||
* Returns error message (0 if no errors found).
|
||
*/
|
||
char *
|
||
sbe_sbs(sbp,p)
|
||
SBBUF *sbp;
|
||
int p;
|
||
{ register SBBUF *sb;
|
||
register struct smblk *sm;
|
||
register struct sdblk *sd;
|
||
|
||
sb = sbp;
|
||
PRF(printf("SBSTR %o: ",sb))
|
||
if(sb == 0)
|
||
PRFBUG(0,printf("Zero pointer???\n"))
|
||
|
||
/* First print out cryptic summary in case pointers bomb
|
||
* out farther on. */
|
||
PRF(printf(" (io,cur,r,w,f,.,+ = %o,%o,%d,%d,%o,%lo,%lo)\n",
|
||
sb->sbiop, sb->sbcur, sb->sbrleft, sb->sbwleft,
|
||
sb->sbflags, sb->sbdot, sb->sboff))
|
||
|
||
PRF(printf(" sbflags %5o = %s (%s)\n",
|
||
sb->sbflags, sbe_fstr(sb->sbflags,sbflgtab),
|
||
sbfhelp))
|
||
|
||
if(sd = sb->sbcur) /* Okay, now try getting pointers */
|
||
sm = sd->sdmem;
|
||
else sm = 0;
|
||
|
||
PRF(printf(" sbcur %6o",sd))
|
||
if(sd)
|
||
{
|
||
PRF(printf("\n %s\n ", sdhdline))
|
||
PRF(sbe_psd(sd))
|
||
|
||
if((sd->sdflags&0377) != SD_NID)
|
||
PRFBUG("SBCUR not SD?",printf(" BAD SDBLK ID!! \n"))
|
||
if(sm)
|
||
{
|
||
PRF(printf(" %s\n ", smhdline))
|
||
PRF(sbe_smp(sm,0))
|
||
if((sm->smflags&0377) != SM_NID)
|
||
PRFBUG("SBCUR has bad SM",
|
||
printf(" BAD SMBLK ID!!\n"))
|
||
}
|
||
}
|
||
|
||
|
||
PRF(printf(" sbiop %6o",sb->sbiop))
|
||
if(sb->sbiop)
|
||
{ if(!sm || sb->sbiop < sm->smaddr
|
||
|| sb->sbiop > (sm->smaddr + sm->smlen))
|
||
PRFBUG("Bad SBIOP", printf(" BAD"))
|
||
}
|
||
else if(sb->sbrleft > 0 || sb->sbwleft > 0)
|
||
PRFBUG("Bad SBIOP/cnts", printf(" BAD"))
|
||
PRF(printf("\n"))
|
||
|
||
PRF(printf(" sbrleft %5o = %5d.",sb->sbrleft, sb->sbrleft))
|
||
if(sb->sbrleft
|
||
&& ( !sm
|
||
|| sb->sbwleft
|
||
|| (sb->sbflags&SB_WRIT)
|
||
|| (sb->sbrleft != (sm->smuse - (sb->sbiop - sm->smaddr)))
|
||
))
|
||
PRFBUG("Bad sbrleft", printf(" BAD"))
|
||
PRF(printf("\n"))
|
||
|
||
PRF(printf(" sbwleft %5o = %5d.", sb->sbwleft, sb->sbwleft))
|
||
if(sb->sbwleft
|
||
&& ( !sm
|
||
|| (sb->sbflags&SB_WRIT) == 0
|
||
|| (sb->sbwleft > (sm->smlen - (sb->sbiop - sm->smaddr)))
|
||
))
|
||
PRFBUG("Bad sbwleft", printf(" BAD"))
|
||
PRF(printf("\n"))
|
||
|
||
PRF(printf(" sbdot %7lo = %7ld.", sb->sbdot, sb->sbdot))
|
||
if(sb->sbdot < 0)
|
||
PRFBUG("Bad sbdot", printf(" BAD"))
|
||
|
||
PRF(printf("\n sboff %7lo = %7ld.\n", sb->sboff, sb->sboff))
|
||
PRF(printf(" I/O ptr loc: %ld.\n\n", sb_tell(sb)))
|
||
|
||
return(0);
|
||
}
|
||
|
||
/* SBE_TBENT() - Auxiliary to add and check entries to a pointer table.
|
||
* Note we assume here that smblk ptrs are used, although sdblks
|
||
* can also be hacked. This wins as long as the two kinds of ptrs
|
||
* are basically identical (saves horrible casting problems).
|
||
* Returns index # if successful (between 0 and NPTRS-1 inclusive).
|
||
* Otherwise an error (-1), with relevant info in pt_xerr:
|
||
* -1 if out of room and flag set making it an error
|
||
* 0-n if entry already existed.
|
||
*/
|
||
sbe_tbent(pt, sm)
|
||
register struct ptab *pt;
|
||
struct smblk *sm;
|
||
{ register struct smblk **smt;
|
||
register int i;
|
||
int p;
|
||
|
||
p = pt->pt_pflag&PTF_PRF; /* Set up print flag */
|
||
smt = &(pt->pt_tab[0]);
|
||
if(i = pt->pt_nsto)
|
||
{ do {
|
||
if(sm == *smt++)
|
||
{ pt->pt_xerr = pt->pt_nsto - i;
|
||
return(-1);
|
||
}
|
||
} while(--i);
|
||
--smt;
|
||
}
|
||
|
||
i = pt->pt_cnt++;
|
||
if(++(pt->pt_nsto) > NPTRS)
|
||
{ if(pt->pt_pflag&PTF_OVFERR)
|
||
{ pt->pt_err = "Ptrtab overflow";
|
||
pt->pt_xerr = -1;
|
||
return(-1);
|
||
}
|
||
pt->pt_nsto = NPTRS;
|
||
i %= NPTRS;
|
||
}
|
||
pt->pt_tab[i] = sm;
|
||
return(i);
|
||
}
|
||
|
||
/* SBE_FSTR(flags, flagtab) - Auxiliary to convert flag word to a string
|
||
* and return pointer to it. Handy for printfs.
|
||
*/
|
||
char *
|
||
sbe_fstr(flags, fp)
|
||
register int flags;
|
||
register struct flgt *fp;
|
||
{ static char retstr[17]; /* Max of 16 flags */
|
||
register char *cp;
|
||
cp = retstr;
|
||
for(; fp->flg_bit; ++fp)
|
||
*cp++ = (fp->flg_bit&flags) ? fp->flg_chr : ' ';
|
||
*cp = 0;
|
||
return(retstr);
|
||
}
|