Split qstr into pools, and put initial pool in ROM.

Qstr's are now split into a linked-list of qstr pools.  This has 2
benefits: the first pool can be in ROM (huge benefit, since we no longer
use RAM for the core qstrs), and subsequent pools use m_new for the next
pool instead of m_renew (thus avoiding a huge single table for all the
qstrs).

Still would be better to use a hash table, but this scheme takes us part
of the way (eventually convert the pools to hash tables).

Also fixed bug with import.

Also improved the way the module code is referenced (not magic number 1
anymore).

1 files changed, 13 insertions, 0 deletions

diff --git a/py/mpqstr.h b/py/mpqstr.h
new file mode 100644
index 0000000000..1440fb3b80
--- /dev/null
+++ b/py/mpqstr.h
@@ -0,0 +1,13 @@
+// See mpqstrraw.h for a list of qstr's that are available as constants.
+// Reference them as MP_QSTR_xxxx.
+//
+// Note: it would be possible to define MP_QSTR_xxx as qstr_from_str_static("xxx")
+// for qstrs that are referenced this way, but you don't want to have them in ROM.
+
+enum {
+    MP_QSTR_nil = 0,
+#define Q(id) MP_QSTR_##id,
+#include "mpqstrraw.h"
+#undef Q
+    MP_QSTR_number_of,
+} category_t;