[PATCH 1/7] introduce new str_new_dd_freeze internal function

[Eric Wong <e@80x24.org>]

This seems like it will be a common pattern to create
and immediately dedupe a string.  In the future, we may
be able to save some memory by eliding temporary object
creation or releasing heap memory via rb_str_resize(..., 0)
---
 ext/kcar/kcar.rl | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/ext/kcar/kcar.rl b/ext/kcar/kcar.rl
index cbcfa97..79f65db 100644
--- a/ext/kcar/kcar.rl
+++ b/ext/kcar/kcar.rl
@@ -106,6 +106,11 @@ static VALUE str_dd_freeze(VALUE str)
   return str;
 }
 
+static VALUE str_new_dd_freeze(const char *ptr, long len)
+{
+  return str_dd_freeze(rb_str_new(ptr, len));
+}
+
 static VALUE stripped_str_new(const char *str, long len)
 {
   long end;
@@ -161,7 +166,7 @@ status_phrase(struct http_parser *hp, VALUE hdr, const char *ptr, size_t len)
 {
   long nr;
 
-  hp->status = str_dd_freeze(rb_str_new(ptr, len));
+  hp->status = str_new_dd_freeze(ptr, len);
 
   /* RSTRING_PTR is null terminated, ptr is not */
   nr = strtol(RSTRING_PTR(hp->status), NULL, 10);
@@ -238,7 +243,7 @@ static void write_value(VALUE hdr, struct http_parser *hp,
   vlen = LEN(mark, p);
   VALIDATE_MAX_LENGTH(vlen, FIELD_VALUE);
   VALIDATE_MAX_LENGTH(flen, FIELD_NAME);
-  f = str_dd_freeze(rb_str_new(fptr, (long)flen));
+  f = str_new_dd_freeze(fptr, (long)flen);
   v = stripped_str_new(vptr, (long)vlen);
 
   /* needs more tests for error-checking here */
-- 
EW