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I1401: Fixed possible NULL pointer dereference (COVERITY)

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Bob Supnik 2017-03-14 04:48:58 -07:00 • committed by Mark Pizzolato
parent f586105051
commit aef66264de
1 changed files with 7 additions and 3 deletions
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10
I1401/i1401_sys.c
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@ -1,6 +1,6 @@
/* i1401_sys.c: IBM 1401 simulator interface
Copyright (c) 1993-2014, Robert M. Supnik
Copyright (c) 1993-2017, Robert M. Supnik
Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the "Software"),
@ -23,6 +23,7 @@
used in advertising or otherwise to promote the sale, use or other dealings
in this Software without prior written authorization from Robert M Supnik.
13-Mar-17 RMS Fixed possible dull dereference (COVERITY)
25-Mar-14 RMS Fixed d character printout (Van Snyder)
25-Mar-12 RMS Fixed && -> & in test (Peter Schorn)
20-Sep-05 RMS Revised for new code tables
@ -362,8 +363,11 @@ int32 i, op, ilnt, t, cflag, wm_seen;
int32 wmch = conv_old? '~': '`';
char gbuf[CBUFSIZE];
cflag = (uptr == NULL) || (uptr == &cpu_unit);
while (isspace (*cptr)) cptr++; /* absorb spaces */
if (uptr == NULL)
uptr = &cpu_unit;
cflag = (uptr == &cpu_unit); /* CPU flag */
while (isspace (*cptr)) /* absorb spaces */
cptr++;
if ((sw & SWMASK ('C')) || (sw & SWMASK ('S')) || (*cptr == wmch) ||
((*cptr == '\'') && cptr++) || ((*cptr == '"') && cptr++)) {
wm_seen = 0;