encoding.c: rb_enc_find_index2

* string.c (str_undump): use rb_enc_find_index2 to find encoding
  by unterminated string.  check the format before encoding name.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61396 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 11 insertions, 0 deletions

diff --git a/encoding.c b/encoding.c
index 68871db268..2043a69598 100644
--- a/encoding.c
+++ b/encoding.c
@@ -724,6 +724,17 @@ rb_enc_find_index(const char *name)
     return i;
 }
 
+int
+rb_enc_find_index2(const char *name, long len)
+{
+    char buf[ENCODING_NAMELEN_MAX+1];
+
+    if (len > ENCODING_NAMELEN_MAX) return -1;
+    memcpy(buf, name, len);
+    buf[len] = '\0';
+    return rb_enc_find_index(buf);
+}
+
 rb_encoding *
 rb_enc_find(const char *name)
 {