* include/ruby/intern.h, sprintf.c (rb_str_catf, rb_str_vcatf): new

  functions.  [ruby-dev:35597]

* string.c (rb_str_capacity): new function to return the capacity.


git-svn-id: http://svn.ruby-lang.org/repos/ruby/trunk@18156 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 14 insertions, 0 deletions

diff --git a/string.c b/string.c
index 387786fe0..72240b850 100644
--- a/string.c
+++ b/string.c
@@ -343,6 +343,20 @@ str_frozen_check(VALUE s)
     }
 }
 
+size_t
+rb_str_capacity(VALUE str)
+{
+    if (STR_EMBED_P(str)) {
+	return RSTRING_EMBED_LEN_MAX;
+    }
+    else if (STR_NOCAPA_P(str)) {
+	return RSTRING(str)->as.heap.len;
+    }
+    else {
+	return RSTRING(str)->as.heap.aux.capa;
+    }
+}
+
 static inline VALUE
 str_alloc(VALUE klass)
 {