From 0b9ee86133a2a0524691c6cdac209dbfcb3bf116 Mon Sep 17 00:00:00 2001
From: Damien George
Date: Wed, 21 Jan 2015 19:14:25 +0000
Subject: py: Add mp_obj_new_str_from_vstr, and use it where relevant.

This patch allows to reuse vstr memory when creating str/bytes object.
This improves memory usage.

Also saves code ROM: 128 bytes on stmhal, 92 bytes on bare-arm, and 88
bytes on unix x64.
---
 py/objexcept.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

(limited to 'py/objexcept.c')

diff --git a/py/objexcept.c b/py/objexcept.c
index e872db341..f2f4012bc 100644
--- a/py/objexcept.c
+++ b/py/objexcept.c
@@ -351,13 +351,13 @@ mp_obj_t mp_obj_new_exception_msg_varg(const mp_obj_type_t *exc_type, const char
         } else {
             // render exception message and store as .args[0]
             // TODO: optimize bufferbloat
-            vstr_t *vstr = vstr_new();
+            vstr_t vstr;
+            vstr_init(&vstr, 16);
             va_list ap;
             va_start(ap, fmt);
-            vstr_vprintf(vstr, fmt, ap);
+            vstr_vprintf(&vstr, fmt, ap);
             va_end(ap);
-            o->args->items[0] = mp_obj_new_str(vstr->buf, vstr->len, false);
-            vstr_free(vstr);
+            o->args->items[0] = mp_obj_new_str_from_vstr(&mp_type_str, &vstr);
         }
     }
 
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