string.c: rb_enc_str_new_cstr

* string.c (rb_enc_str_new_cstr): new function to create a string from
  the C-string pointer with the specified encoding.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42811 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 13 insertions, 0 deletions

diff --git a/string.c b/string.c
index 7f8707ae5c..70cedf204b 100644
--- a/string.c
+++ b/string.c
@@ -34,6 +34,7 @@
 #undef rb_str_new_cstr
 #undef rb_tainted_str_new_cstr
 #undef rb_usascii_str_new_cstr
+#undef rb_enc_str_new_cstr
 #undef rb_external_str_new_cstr
 #undef rb_locale_str_new_cstr
 #undef rb_str_dup_frozen
@@ -474,6 +475,18 @@ rb_usascii_str_new_cstr(const char *ptr)
 }
 
 VALUE
+rb_enc_str_new_cstr(const char *ptr, rb_encoding *enc)
+{
+    if (!ptr) {
+	rb_raise(rb_eArgError, "NULL pointer given");
+    }
+    if (rb_enc_mbminlen(enc) != 1) {
+	rb_raise(rb_eArgError, "wchar encoding given");
+    }
+    return rb_enc_str_new(ptr, strlen(ptr), enc);
+}
+
+VALUE
 rb_tainted_str_new(const char *ptr, long len)
 {
     VALUE str = rb_str_new(ptr, len);