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ngspice crashes in eprvcd with 3 or more analog parameters. 

Fixed by changing the parameter sequence and zeroing the initial array.
This commit is contained in:
Paul Campbell 2026-04-24 15:28:49 +02:00 committed by Holger Vogt
parent 08accebcd3
commit 5490c3c33d
1 changed files with 7 additions and 5 deletions
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12
src/xspice/evt/evtprint.c
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@ -594,7 +594,7 @@ EVTprintvcd(wordlist *wl)
char *node_value[EPRINT_MAXARGS];
char *old_node_value[EPRINT_MAXARGS];
char node_ident[EPRINT_MAXARGS + 1];
char vbuf[24][2][EPRINT_MAXARGS]; // Analog value strings
char vbuf[EPRINT_MAXARGS][2][24]; // Analog value strings
CKTcircuit *ckt;
@ -607,6 +607,8 @@ EVTprintvcd(wordlist *wl)
char *value;
memset(vbuf, 0, sizeof(vbuf));
/* Check for the "-a" option (output analog values at timesteps)
* and "-t nn": specifies the VCD timestep with range 1fs to 1s */
@ -804,10 +806,10 @@ EVTprintvcd(wordlist *wl)
if (ctx.node_vector[i]) {
/* Analog node or expression. */
sprintf(vbuf[0][i], "%.16g", get_real(i, 0.0, &ctx));
node_value[i] = vbuf[0][i];
old_node_value[i] = vbuf[1][i];
strcpy(vbuf[1][i], vbuf[0][i]);
sprintf(vbuf[i][0], "%.16g", get_real(i, 0.0, &ctx));
node_value[i] = vbuf[i][0];
old_node_value[i] = vbuf[i][1];
strcpy(vbuf[i][1], vbuf[i][0]);
} else {
/* This must return a pointer to a statically-allocated string. */