stream: Add generic unbuffered iternext method.

Uses stream_unbuffered_readline underline.

2 files changed, 13 insertions, 1 deletions

diff --git a/py/stream.c b/py/stream.c
index d3a11affbc..3a87d0444c 100644
--- a/py/stream.c
+++ b/py/stream.c
@@ -137,9 +137,18 @@ static mp_obj_t stream_unbuffered_readline(uint n_args, const mp_obj_t *args) {
     // TODO: \0
     vstr_add_byte(vstr, 0);
     vstr_shrink(vstr);
-    return mp_obj_new_str(qstr_from_str_take(vstr_str(vstr), vstr_len(vstr)));
+    return MP_OBJ_NEW_QSTR(qstr_from_str_take(vstr_str(vstr), vstr_len(vstr)));
 }
 
+mp_obj_t mp_stream_unbuffered_iter(mp_obj_t self) {
+    mp_obj_t l_in = stream_unbuffered_readline(1, &self);
+    const char *l = qstr_str(MP_OBJ_QSTR_VALUE(l_in));
+    // TODO: \0
+    if (*l != 0) {
+        return l_in;
+    }
+    return mp_const_stop_iteration;
+}
 
 MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mp_stream_read_obj, 1, 2, stream_read);
 MP_DEFINE_CONST_FUN_OBJ_1(mp_stream_readall_obj, stream_readall);
diff --git a/py/stream.h b/py/stream.h
index 58e8072549..a0cc34797b 100644
--- a/py/stream.h
+++ b/py/stream.h
@@ -2,3 +2,6 @@ extern const mp_obj_fun_native_t mp_stream_read_obj;
 extern const mp_obj_fun_native_t mp_stream_readall_obj;
 extern const mp_obj_fun_native_t mp_stream_unbuffered_readline_obj;
 extern const mp_obj_fun_native_t mp_stream_write_obj;
+
+// Iterator which uses mp_stream_unbuffered_readline_obj
+mp_obj_t mp_stream_unbuffered_iter(mp_obj_t self);