WL#1324 table name to file name encoding

- Encoding itself, implemented as a charset
  "filename". Originally planned to use '.'
  as an escape character, but now changed to '@'
  for two reasons: "ls" does not return
  file names starting with '.' considering them
  as a kind of hidden files; some platforms
  do not allow several dots in a file name.
- replacing many calls of my_snprintf() and
  strnxmov() to the new build_table_filename().
- Adding MY_APPEND_EXT mysys flag, to append
  an extention rather that replace it.
- Replacing all numeric constants in fn_format
  flag arguments to their mysys definitions, e.g.
  MY_UNPACK_FILENAME,
- Predictability in several function/methods:
  when a table name can appear with or withot .frm
  extension. Some functions/methods were changed
  so accept names strictly with .frm, other - strictly
  without .frm extensions. Several DBUG_ASSERTs were
  added to check whether an extension is passed.
Many files:
  table name to file name encoding
mysql_priv.h:
  Prototypes for new table name encoding tools.
ctype-utf8.c:
  Implementing "filename" charset for
  table name to file name encoding.
row0mysql.c:
  Fixing table name prefix.
mf_format.c:
  Adding MY_APPEND_EXT processing.
Many files:
  Fixing tests.
my_sys.h:
  Adding new flag to append rather than replace an extension.
m_ctype.h:
  Adding "filename" charset definition.

1 files changed, 4 insertions, 2 deletions

diff --git a/sql/discover.cc b/sql/discover.cc
index 1251055c70e..2a3da55f154 100644
--- a/sql/discover.cc
+++ b/sql/discover.cc
@@ -55,7 +55,8 @@ int readfrm(const char *name,
   *frmdata= NULL;      // In case of errors
   *len= 0;
   error= 1;
-  if ((file=my_open(fn_format(index_file,name,"",reg_ext,4),
+  if ((file=my_open(fn_format(index_file,name,"",reg_ext,
+                              MY_UNPACK_FILENAME|MY_APPEND_EXT),
 		    O_RDONLY | O_SHARE,
 		    MYF(0))) < 0)  
     goto err_end; 
@@ -112,7 +113,8 @@ int writefrm(const char *name, const void *frmdata, uint len)
   //DBUG_DUMP("frmdata", (char*)frmdata, len);
 
   error= 0;
-  if ((file=my_create(fn_format(index_file,name,"",reg_ext,4),
+  if ((file=my_create(fn_format(index_file,name,"",reg_ext,
+                      MY_UNPACK_FILENAME|MY_APPEND_EXT),
 		      CREATE_MODE,O_RDWR | O_TRUNC,MYF(MY_WME))) >= 0)
   {
     if (my_write(file,(byte*)frmdata,len,MYF(MY_WME | MY_NABP)))