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, 4 insertions, 3 deletions

diff --git a/py/objstr.c b/py/objstr.c
index 54e6f37705..03a761863f 100644
--- a/py/objstr.c
+++ b/py/objstr.c
@@ -7,6 +7,7 @@
 #include "nlr.h"
 #include "misc.h"
 #include "mpconfig.h"
+#include "mpqstr.h"
 #include "obj.h"
 #include "runtime0.h"
 #include "runtime.h"
@@ -61,7 +62,7 @@ mp_obj_t str_binary_op(int op, mp_obj_t lhs_in, mp_obj_t rhs_in) {
             } else {
                 // Message doesn't match CPython, but we don't have so much bytes as they
                 // to spend them on verbose wording
-                nlr_jump(mp_obj_new_exception_msg(rt_q_TypeError, "index must be int"));
+                nlr_jump(mp_obj_new_exception_msg(MP_QSTR_TypeError, "index must be int"));
             }
 
         case RT_BINARY_OP_ADD:
@@ -134,7 +135,7 @@ mp_obj_t str_join(mp_obj_t self_in, mp_obj_t arg) {
     return mp_obj_new_str(qstr_from_str_take(joined_str, required_len + 1));
 
 bad_arg:
-    nlr_jump(mp_obj_new_exception_msg(rt_q_TypeError, "?str.join expecting a list of str's"));
+    nlr_jump(mp_obj_new_exception_msg(MP_QSTR_TypeError, "?str.join expecting a list of str's"));
 }
 
 void vstr_printf_wrapper(void *env, const char *fmt, ...) {
@@ -158,7 +159,7 @@ mp_obj_t str_format(int n_args, const mp_obj_t *args) {
                 vstr_add_char(vstr, '{');
             } else if (*str == '}') {
                 if (arg_i >= n_args) {
-                    nlr_jump(mp_obj_new_exception_msg(rt_q_IndexError, "tuple index out of range"));
+                    nlr_jump(mp_obj_new_exception_msg(MP_QSTR_IndexError, "tuple index out of range"));
                 }
                 mp_obj_print_helper(vstr_printf_wrapper, vstr, args[arg_i]);
                 arg_i++;