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.

1 files changed, 0 insertions, 20 deletions

diff --git a/py/vstr.c b/py/vstr.c
index 1f9f13637..6856cfe39 100644
--- a/py/vstr.c
+++ b/py/vstr.c
@@ -136,26 +136,6 @@ char *vstr_extend(vstr_t *vstr, size_t size) {
     return p;
 }
 
-// Shrink vstr to be given size
-bool vstr_set_size(vstr_t *vstr, size_t size) {
-    if (vstr->fixed_buf) {
-        return false;
-    }
-    char *new_buf = m_renew(char, vstr->buf, vstr->alloc, size);
-    if (new_buf == NULL) {
-        vstr->had_error = true;
-        return false;
-    }
-    vstr->buf = new_buf;
-    vstr->alloc = vstr->len = size;
-    return true;
-}
-
-// Shrink vstr allocation to its actual length
-bool vstr_shrink(vstr_t *vstr) {
-    return vstr_set_size(vstr, vstr->len);
-}
-
 STATIC bool vstr_ensure_extra(vstr_t *vstr, size_t size) {
     if (vstr->len + size + 1 > vstr->alloc) {
         if (vstr->fixed_buf) {