+#
+/*
+ *
+ * UNIX debugger
+ *
+ */
+
+#include "defs.h"
+SCCSID (@(#)format.c 2.4);
+
+
+MSG BADMOD;
+MSG NOFORK;
+MSG ADWRAP;
+
+SYMTAB symbol;
+
+INT mkfault;
+CHAR *lp;
+L_INT maxoff;
+ADDR sigint;
+ADDR sigqit;
+STRING errflg;
+CHAR lastc,peekc;
+L_INT dot;
+INT dotinc;
+L_INT expv;
+L_INT var[];
+
+
+STRING fphack;
+rdfp()
+{
+ return(lastc= *fphack++);
+}
+
+scanform(icount,ifp,itype,ptype)
+L_INT icount;
+STRING ifp;
+{
+ STRING fp;
+ CHAR modifier;
+ INT fcount, init=1;
+ L_INT savdot;
+ BOOL exact;
+
+ WHILE icount
+ DO fp=ifp;
+ savdot=dot; init=0;
+
+ IF init==0 ANDF (exact=(findsym(dot,ptype)==0)) ANDF maxoff
+ THEN printf("\n%.8s:%16t",symbol.symc);
+ FI
+
+ /*now loop over format*/
+ WHILE *fp ANDF errflg==0
+ DO IF (fphack=fp, getnum(rdfp))
+ THEN fcount=expv; fp= --fphack; peekc=0;
+ ELSE fcount=1;
+ FI
+
+ IF *fp==0 THEN break; FI
+ IF exact ANDF dot==savdot ANDF itype==ISP ANDF symbol.symc[0]=='_' ANDF *fp=='i'
+ THEN exform(1,"x",itype,ptype); fp++; printc(EOR); /* entry mask */
+ ELSE fp=exform(fcount,fp,itype,ptype);
+ FI
+ OD
+ dotinc=dot-savdot;
+ dot=savdot;
+
+ IF errflg
+ THEN IF icount<0
+ THEN errflg=0; break;
+ ELSE error(errflg);
+ FI
+ FI
+ IF --icount
+ THEN dot=inkdot(dotinc);
+ FI
+ IF mkfault THEN error(0); FI
+ OD
+}
+
+STRING
+exform(fcount,ifp,itype,ptype)
+INT fcount;
+STRING ifp;
+{
+ /* execute single format item `fcount' times
+ * sets `dotinc' and moves `dot'
+ * returns address of next format item
+ */
+ POS w;
+ L_INT savdot, wx;
+ STRING fp;
+ CHAR c, modifier, longpr;
+ L_REAL fw;
+ struct{
+ L_INT sa;
+ INT sb,sc;
+ };
+
+ WHILE fcount>0
+ DO fp = ifp; c = *fp;
+ longpr=(c>='A')&(c<='Z')|(c=='f')|(c=='4');
+ IF itype==NSP ORF *fp=='a'
+ THEN wx=dot; w=dot;
+ ELSE w=get(dot,itype);
+ IF longpr
+ THEN wx=itol(get(inkdot(2),itype),w);
+ ELSE wx=w;
+ FI
+ FI
+ IF c=='F'
+ THEN fw.sb=get(inkdot(4),itype);
+ fw.sc=get(inkdot(6),itype);
+ FI
+ IF errflg THEN return(fp); FI
+ IF mkfault THEN error(0); FI
+ var[0]=wx;
+ modifier = *fp++;
+ dotinc=(longpr?4:2);;
+
+ IF charpos()==0 ANDF modifier!='a' THEN printf("%16m"); FI
+
+ switch(modifier) {
+
+ case SP: case TB:
+ break;
+
+ case 't': case 'T':
+ printf("%T",fcount); return(fp);
+
+ case 'r': case 'R':
+ printf("%M",fcount); return(fp);
+
+ case 'a':
+ psymoff(dot,ptype,":%16t"); dotinc=0; break;
+
+ case 'p':
+ psymoff(var[0],ptype,"%16t"); break;
+
+ case 'u':
+ printf("%-8u",w); break;
+
+ case 'U':
+ printf("%-16U",wx); break;
+
+ case 'c': case 'C':
+ IF modifier=='C'
+ THEN printesc(w&LOBYTE);
+ ELSE printc(w&LOBYTE);
+ FI
+ dotinc=1; break;
+
+ case 'b': case 'B':
+ printf("%-8o", w&LOBYTE); dotinc=1; break;
+
+ case '1':
+ printf("%-8r", w&LOBYTE); dotinc=1; break;
+
+ case '2':
+ case 'w':
+ printf("%-8r", w); break;
+
+ case '4':
+ case 'W':
+ printf("%-16R", wx); break;
+
+ case 's': case 'S':
+ savdot=dot; dotinc=1;
+ WHILE (c=get(dot,itype)&LOBYTE) ANDF errflg==0
+ DO dot=inkdot(1);
+ IF modifier == 'S'
+ THEN printesc(c);
+ ELSE printc(c);
+ FI
+ endline();
+ OD
+ dotinc=dot-savdot+1; dot=savdot; break;
+
+ case 'x':
+ printf("%-8x",w); break;
+
+ case 'X':
+ printf("%-16X", wx); break;
+
+ case 'Y':
+ printf("%-24Y", wx); break;
+
+ case 'q':
+ printf("%-8q", w); break;
+
+ case 'Q':
+ printf("%-16Q", wx); break;
+
+ case 'o':
+ printf("%-8o", w); break;
+
+ case 'O':
+ printf("%-16O", wx); break;
+
+ case 'i':
+ printins(0,itype,w); printc(EOR); break;
+
+ case 'd':
+ printf("%-8d", w); break;
+
+ case 'D':
+ printf("%-16D", wx); break;
+
+ case 'f':
+ fw = 0;
+ fw.sa = wx;
+ printf("%-16.9f", fw);
+ dotinc=4; break;
+
+ case 'F':
+ fw.sa = wx;
+ printf("%-32.18F", fw);
+ dotinc=8; break;
+
+ case 'n': case 'N':
+ printc('\n'); dotinc=0; break;
+
+ case '"':
+ dotinc=0;
+ WHILE *fp != '"' ANDF *fp
+ DO printc(*fp++); OD
+ IF *fp THEN fp++; FI
+ break;
+
+ case '^':
+ dot=inkdot(-dotinc*fcount); return(fp);
+
+ case '+':
+ dot=inkdot(fcount); return(fp);
+
+ case '-':
+ dot=inkdot(-fcount); return(fp);
+
+ default: error(BADMOD);
+ }
+ IF itype!=NSP
+ THEN dot=inkdot(dotinc);
+ FI
+ fcount--; endline();
+ OD
+
+ return(fp);
+}
+
+shell()
+{
+#ifndef EDDT
+ INT rc, status, unixpid;
+ STRING argp = lp;
+ STRING getenv(), shell = getenv("SHELL");
+#ifdef VFORK
+ char oldstlp;
+#endif
+
+ if (shell == 0)
+ shell = "/bin/sh";
+ WHILE lastc!=EOR DO rdc(); OD
+#ifndef VFORK
+ IF (unixpid=fork())==0
+#else
+ oldstlp = *lp;
+ IF (unixpid=vfork())==0
+#endif
+ THEN signal(SIGINT,sigint); signal(SIGQUIT,sigqit);
+ *lp=0; execl(shell, "sh", "-c", argp, 0);
+ _exit(16);
+#ifndef VFORK
+ ELIF unixpid == -1
+#else
+ ELIF *lp = oldstlp, unixpid == -1
+#endif
+ THEN error(NOFORK);
+ ELSE signal(SIGINT,1);
+ WHILE (rc = wait(&status)) != unixpid ANDF rc != -1 DONE
+ signal(SIGINT,sigint);
+ prints("!"); lp--;
+ FI
+#endif
+}
+
+
+printesc(c)
+{
+ c &= STRIP;
+ IF c<SP ORF c>'~' ORF c=='@'
+ THEN printf("@%c",(c=='@' ? '@' : c^0140));
+ ELSE printc(c);
+ FI
+}
+
+L_INT inkdot(incr)
+{
+ L_INT newdot;
+
+ newdot=dot+incr;
+ IF (dot NEQ newdot) >> 24 THEN error(ADWRAP); FI
+ return(newdot);
+}
projects / unix-history / commitdiff