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Watch signed comparisons, that lead to infinite loops.

This commit is contained in:
steve 2002-08-22 23:34:52 +00:00
parent 985c34bfd9
commit 2854a524f0
1 changed files with 25 additions and 6 deletions
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31
vpi/sys_display.c
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@ -17,7 +17,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#ifdef HAVE_CVS_IDENT
#ident "$Id: sys_display.c,v 1.42 2002/08/12 01:35:04 steve Exp $"
#ident "$Id: sys_display.c,v 1.43 2002/08/22 23:34:52 steve Exp $"
#endif
# include "config.h"
@ -136,25 +136,41 @@ static void format_time(unsigned mcd, int fsize, const char*value)
bp -= strlen(timeformat_info.suff);
strcpy(bp, timeformat_info.suff);
/* Draw 0s to pad out the precision to the requested count. */
/* cnt is the number of digits that the simulation precision
units exceeds the time format units. For example, if the
simulation is in 1ps (-12) and $timeformat units is 1ns (-9)
then cnt is 3. */
cnt = timeformat_info.units - prec;
while (cnt < timeformat_info.prec) {
/* Draw 0s to pad out the precision to the requested count.
This accounts for the case that the difference between
simulation units and timeformat units is not enough for the
requested timeformat precision. */
while (cnt < (int)timeformat_info.prec) {
*--bp = '0';
cnt += 1;
}
/* Chop excess precision. */
while (cnt > timeformat_info.prec) {
/* Chop excess precision. This accounts for the case where the
simulation precision is greater then the timeformat
precision. Remove least significant digits from the integer
value of the time strings. */
while (cnt > (int)timeformat_info.prec) {
if (cp > value)
cp -= 1;
cnt -= 1;
prec += 1;
}
assert(cnt == timeformat_info.prec);
/* Draw the digits of the time that are to the right of the
decimal point. Pad to the right with zeros if needed, to
get to the decimal point. */
if (prec < timeformat_info.units) {
if (prec <= timeformat_info.units) {
while (prec < timeformat_info.units) {
char val;
if (cp == value)
@ -1348,6 +1364,9 @@ void sys_display_register()
/*
* $Log: sys_display.c,v $
* Revision 1.43 2002/08/22 23:34:52 steve
* Watch signed comparisons, that lead to infinite loops.
*
* Revision 1.42 2002/08/12 01:35:04 steve
* conditional ident string using autoconfig.
*