From 1c5457e1807e23e88886f4a5ec6fb45384881282 Mon Sep 17 00:00:00 2001
From: Tim Edwards <tim@opencircuitdesign.com>
Date: Wed, 16 Jun 2021 15:20:39 -0400
Subject: [PATCH] Corrected a minor issue that cropped up today in which the
 search for file extensions is greedy and picks the first matching extension
 starting at the front of the string, such that, e.g., "file.ext.spice" is
 interpreted as a ".ext" file and not a ".spice" file.

---
 base/netfile.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/base/netfile.c b/base/netfile.c
index e54c615..3ecbdb4 100644
--- a/base/netfile.c
+++ b/base/netfile.c
@@ -896,7 +896,9 @@ char *ReadNetlist(char *fname, int *fnum)
 
   /* make first pass looking for extension */
   for (index = 0; formats[index].extension != NULL; index++) {
-    if (strstr(fname, formats[index].extension) != NULL) {
+    int extlen = strlen(formats[index].extension);
+    int flen = strlen(fname);
+    if (!strcmp(fname + flen - extlen, formats[index].extension)) {
       return (*(formats[index].proc))(fname, fnum);
     }
   }