diff options
Diffstat (limited to 'io.c')
-rw-r--r-- | io.c | 9 |
1 files changed, 4 insertions, 5 deletions
@@ -7959,13 +7959,12 @@ setup_narg(int cmd, VALUE *argp, int io_p) len = 256; rb_str_modify(arg); - if (len <= RSTRING_LEN(arg)) { - len = RSTRING_LEN(arg); - } - if (RSTRING_LEN(arg) < len) { + /* expand for data + sentinel. */ + if (RSTRING_LEN(arg) < len+1) { rb_str_resize(arg, len+1); } - RSTRING_PTR(arg)[len] = 17; /* a little sanity check here */ + /* a little sanity check here */ + RSTRING_PTR(arg)[RSTRING_LEN(arg) - 1] = 17; narg = (long)(SIGNED_VALUE)RSTRING_PTR(arg); } } |