scc

commit ad1f4adbdc619676c1e133465becbf96b16e4e05
parent 7d21e2bf608c9b2405c2cb68cb7b82f176e22ef4
Author: Roberto E. Vargas Caballero <k0ga@shike2.com>
Date:   Mon,  1 Nov 2021 17:45:02 +0100

cc1: Allow empty fname in setloc()

so setloc() must support an empty fname parameter for that case.

Diffstat:
M
src/cmd/cc/cc1/lex.c
 | 
15
+++++++++------

1 file changed, 9 insertions(+), 6 deletions(-)
diff --git a/src/cmd/cc/cc1/lex.c b/src/cmd/cc/cc1/lex.c
@@ -73,13 +73,16 @@ setloc(char *fname, unsigned line)
 {
 	size_t len;
 
-	if ((len = strlen(fname)) >= FILENAME_MAX)
-		die("cc1: %s: file name too long", fname);
-	memmove(filenam, fname, len);
-	filenam[len] = '\0';
+	if (fname) {
+		if ((len = strlen(fname)) >= FILENAME_MAX)
+			die("cc1: %s: file name too long", fname);
+		memmove(filenam, fname, len);
+		filenam[len] = '\0';
+
+		free(input->filenam);
+		input->filenam = xstrdup(fname);
+	}
 
-	free(input->filenam);
-	input->filenam = xstrdup(fname);
 	lineno = input->lineno = line;
 }