fix for file type detection on linux and mac (#3788)

ramcdougal · web-flow · commit d42eb9c3460e · 2026-06-24T00:55:57.000-04:00
On a mac (running Tahoe), the old expression with the escaped &lt; always evaluated to 0. On Linux, it always evaluated to -1. This meant that the macs always thought files were MorphML and Linux never thought they were.
diff --git a/share/lib/hoc/import3d/import3d_gui.hoc b/share/lib/hoc/import3d/import3d_gui.hoc
@@ -431,7 +431,7 @@ func some_format() {local i, a,b,c,d,e,f,g, n
 			return 0
 		}
 		file.gets(tstr)
-		if (hoc_sf_.head(tstr, "^\\<\\?xml", tstr1) != -1) {
+		if (hoc_sf_.head(tstr, "^<\\?xml", tstr1) != -1) {
 			if (nrnpython("")) {
 				swc = new Import3d_MorphML() break
 			}else{

Original file line number	Diff line number	Diff line change
`@@ -431,7 +431,7 @@ func some_format() {local i, a,b,c,d,e,f,g, n`
`431`	`431`	`return 0`
`432`	`432`	`}`
`433`	`433`	`file.gets(tstr)`
`434`		`- if (hoc_sf_.head(tstr, "^\\<\\?xml", tstr1) != -1) {`
	`434`	`+ if (hoc_sf_.head(tstr, "^<\\?xml", tstr1) != -1) {`
`435`	`435`	`if (nrnpython("")) {`
`436`	`436`	`swc = new Import3d_MorphML() break`
`437`	`437`	`}else{`