Bug#5439 : mysql_server_init() crashes if ShiftJIS path is passed

(important for Adobe).

mf_pack.c, mf_dirname.c, charset.c, my_sys.h:

  - adding fs_character_set() function on Windows
  - ignoring fake slashes which are just multibyte
    parts in several functions in /mysys

Verified by Shu to work on WinXP and Win2k.
Test is not possible, or very hard to do.


include/my_sys.h:
  Bug#5439 : mysql_server_init() crashes if ShiftJIS path is passed
  (important for Adobe)
  - adding fs_character_set() function on Windows
  - ignoring fake slashes which are just multibyte
    parts in several functions in /mysys
mysys/charset.c:
  d
mysys/mf_dirname.c:
  d
mysys/mf_pack.c:
  d

1 files changed, 32 insertions, 1 deletions

diff --git a/mysys/mf_dirname.c b/mysys/mf_dirname.c
index 3de82c05b87..45bf4d56c31 100644
--- a/mysys/mf_dirname.c
+++ b/mysys/mf_dirname.c
@@ -22,6 +22,9 @@
 uint dirname_length(const char *name)
 {
   register my_string pos,gpos;
+#ifdef BASKSLASH_MBTAIL
+  CHARSET_INFO *fs= fs_character_set();
+#endif
 #ifdef FN_DEVCHAR
   if ((pos=(char*)strrchr(name,FN_DEVCHAR)) == 0)
 #endif
@@ -29,12 +32,22 @@ uint dirname_length(const char *name)
 
   gpos= pos++;
   for ( ; *pos ; pos++)				/* Find last FN_LIBCHAR */
+  {
+#ifdef BASKSLASH_MBTAIL
+    uint l;
+    if (use_mb(fs) && (l= my_ismbchar(fs, pos, pos + 3)))
+    {
+      pos+= l - 1;
+      continue;
+    }
+#endif
     if (*pos == FN_LIBCHAR || *pos == '/'
 #ifdef FN_C_AFTER_DIR
 	|| *pos == FN_C_AFTER_DIR || *pos == FN_C_AFTER_DIR_2
 #endif
 	)
       gpos=pos;
+  }
   return ((uint) (uint) (gpos+1-(char*) name));
 }
 
@@ -85,6 +98,9 @@ uint dirname_part(my_string to, const char *name)
 char *convert_dirname(char *to, const char *from, const char *from_end)
 {
   char *to_org=to;
+#ifdef BACKSLASH_MBTAIL
+  CHARSET_INFO *fs= fs_character_set();
+#endif
 
   /* We use -2 here, becasue we need place for the last FN_LIBCHAR */
   if (!from_end || (from_end - from) > FN_REFLEN-2)
@@ -103,7 +119,22 @@ char *convert_dirname(char *to, const char *from, const char *from_end)
 	*to++= FN_C_AFTER_DIR;
 #endif
       else
-	*to++= *from;
+      {
+#ifdef BACKSLASH_MBTAIL
+        uint l;
+        if (use_mb(fs) && (l= my_ismbchar(fs, from, from + 3)))
+        {
+          memmove(to, from, l);
+          to+= l;
+          from+= l - 1;
+          to_org= to; /* Don't look inside mbchar */
+        }
+        else
+#endif
+        {
+          *to++= *from;
+        }
+      }
     }
     *to=0;
   }