* include/ruby/intern.h (rb_str_buf_new2): optimization for literals.

* string.c (str_buf_cat): returns VALUE.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@18148 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

3 files changed, 16 insertions, 2 deletions

diff --git a/ChangeLog b/ChangeLog
index a9f8af46b2..a4b8603323 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Tue Jul 22 04:26:16 2008  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* include/ruby/intern.h (rb_str_buf_new2): optimization for literals.
+
+	* string.c (str_buf_cat): returns VALUE.
+
 Tue Jul 22 03:34:01 2008  Eric Hodel <drbrain@segment7.net>
 
 	* lib/rdoc*: Update to RDoc 2.1.0 r112.
diff --git a/include/ruby/intern.h b/include/ruby/intern.h
index 29fa2c2a2c..3d63c3877b 100644
--- a/include/ruby/intern.h
+++ b/include/ruby/intern.h
@@ -597,6 +597,13 @@ VALUE rb_str_length(VALUE);
 	rb_usascii_str_new(str, strlen(str)) : \
 	rb_usascii_str_new2(str);	       \
 })
+#define rb_str_buf_new2(str) __extension__ ( \
+{						\
+    (__builtin_constant_p(str)) ?		\
+	rb_str_buf_cat(rb_str_buf_new(strlen(str)), \
+		       str, strlen(str)) :	\
+	rb_str_buf_new2(str);			\
+})
 #define rb_str_buf_cat2(str, ptr) __extension__ ( \
 {						\
     (__builtin_constant_p(ptr)) ?	        \
diff --git a/string.c b/string.c
index 13c98ad332..387786fe07 100644
--- a/string.c
+++ b/string.c
@@ -28,6 +28,7 @@
 #undef rb_str_new2
 #undef rb_tainted_str_new2
 #undef rb_usascii_str_new2
+#undef rb_str_buf_new2
 #undef rb_str_buf_cat2
 #undef rb_str_cat2
 
@@ -1400,7 +1401,7 @@ rb_str_resize(VALUE str, long len)
     return str;
 }
 
-static long
+static VALUE
 str_buf_cat(VALUE str, const char *ptr, long len)
 {
     long capa, total, off = -1;
@@ -3746,7 +3747,7 @@ rb_str_inspect(VALUE str)
 {
     rb_encoding *enc = STR_ENC_GET(str);
     char *p, *pend;
-    VALUE result = rb_str_buf_new2("");
+    VALUE result = rb_str_buf_new(0);
 
     if (!rb_enc_asciicompat(enc)) enc = rb_usascii_encoding();
     rb_enc_associate(result, enc);