fix #14 issue, add check stream invalid for bitstr_tell.

rockcarry · Feb 24, 2020 · 5d07fff · 5d07fff
1 parent 6042cc5
commit 5d07fff
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/bitstr.c b/bitstr.c
@@ -225,6 +225,7 @@ int bitstr_seek(void *stream, long offset, int origin)
 long bitstr_tell(void *stream)
 {
     int type = *(int*)stream;
+    if (!stream) return EOF;
     switch (type) {
     case BITSTR_MEM : return mbitstr_tell(stream);
     case BITSTR_FILE: return fbitstr_tell(stream);