BUG#11338 (logging of prepared statement w/ blob type)

In cp932, '\' character can be the second byte in a 
multi-byte character stream. This makes it difficult to use
mysql_escape_string. Added flag to indicate which languages allow
'\' as second byte of multibyte sequence so that when putting a prepared
statement into the binlog we can decide at runtime whether hex encoding
is really needed.

1 files changed, 18 insertions, 0 deletions

diff --git a/mysys/charset.c b/mysys/charset.c
index 3a39fce9437..df3f1cfa279 100644
--- a/mysys/charset.c
+++ b/mysys/charset.c
@@ -663,3 +663,21 @@ CHARSET_INFO *fs_character_set()
   return fs_cset_cache;
 }
 #endif
+
+/*
+  Transforms a string into hex form.
+ */
+char *bare_str_to_hex(char *to, const char *from, uint len)
+{
+  char *p= to;
+  uint i;
+  for (i= 0; i < len; i++, p+= 2)
+  {
+    /* val[i] is char. Casting to uchar helps greatly if val[i] < 0 */
+    uint tmp= (uint) (uchar) from[i];
+    p[0]= _dig_vec_upper[tmp >> 4];
+    p[1]= _dig_vec_upper[tmp & 15];
+  }
+  *p= 0;
+  return p; // pointer to end 0 of 'to'
+}