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-rw-r--r--isam/_key.c238
1 files changed, 0 insertions, 238 deletions
diff --git a/isam/_key.c b/isam/_key.c
deleted file mode 100644
index 65d6885869e..00000000000
--- a/isam/_key.c
+++ /dev/null
@@ -1,238 +0,0 @@
-/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
-
-/* Functions to handle keys */
-
-#include "isamdef.h"
-#include "m_ctype.h"
-
-static void _nisam_put_key_in_record(N_INFO *info,uint keynr,byte *record);
-
- /* Make a intern key from a record */
- /* If ascii key convert according to sortorder */
- /* Ret: Length of key */
-
-uint _nisam_make_key(register N_INFO *info, uint keynr, uchar *key, const char *record, ulong filepos)
-{
- uint length;
- byte *pos,*end;
- uchar *start;
- reg1 N_KEYSEG *keyseg;
- enum ha_base_keytype type;
- DBUG_ENTER("_nisam_make_key");
-
- start=key;
- for (keyseg=info->s->keyinfo[keynr].seg ; keyseg->base.type ;keyseg++)
- {
- type=(enum ha_base_keytype) keyseg->base.type;
- if (keyseg->base.flag & HA_SPACE_PACK)
- {
- pos= (byte*) record+keyseg->base.start; end=pos+keyseg->base.length;
- if (type != HA_KEYTYPE_NUM)
- {
- while (end > pos && end[-1] == ' ')
- end--;
- }
- else
- {
- while (pos < end && pos[0] == ' ')
- pos++;
- }
- *key++= (uchar) (length=(uint) (end-pos));
- memcpy((byte*) key,(byte*) pos,(size_t) length);
- if (!use_strnxfrm(default_charset_info))
- {
- if (type == HA_KEYTYPE_TEXT)
- my_strnxfrm(default_charset_info,(uchar*) key, length,
- (uchar*) key, length);
- }
- key+=length;
- }
- else
- {
- memcpy((byte*) key,(byte*) record+keyseg->base.start,
- (size_t) keyseg->base.length);
- if (!use_strnxfrm(default_charset_info))
- {
- if (type == HA_KEYTYPE_TEXT)
- my_strnxfrm(default_charset_info,(uchar*) key,
- (uint) keyseg->base.length,
- (uchar*) key,
- (uint) keyseg->base.length);
- }
-#ifdef NAN_TEST
- else if (type == HA_KEYTYPE_FLOAT)
- {
- float nr;
- bmove((byte*) &nr,(byte*) key,sizeof(float));
- if (nr == (float) FLT_MAX)
- {
- nr= (float) FLT_MAX;
- bmove((byte*) key,(byte*) &nr,sizeof(float));
- }
- }
- else if (type == HA_KEYTYPE_DOUBLE)
- {
- double nr;
- bmove((byte*) &nr,(byte*) key,sizeof(double));
- if (nr == DBL_MAX)
- {
- nr=DBL_MAX;
- bmove((byte*) key,(byte*) &nr,sizeof(double));
- }
- }
-#endif
- key+= keyseg->base.length;
- }
- }
- _nisam_dpointer(info,key,filepos);
- DBUG_PRINT("exit",("keynr: %d",keynr));
- DBUG_DUMP("key",(byte*) start,(uint) (key-start)+keyseg->base.length);
- DBUG_EXECUTE("key",_nisam_print_key(DBUG_FILE,info->s->keyinfo[keynr].seg,start););
- DBUG_RETURN((uint) (key-start)); /* Return keylength */
-} /* _nisam_make_key */
-
-
- /* Pack a key to intern format from given format (c_rkey) */
- /* if key_length is set returns new length of key */
-
-uint _nisam_pack_key(register N_INFO *info, uint keynr, uchar *key, uchar *old, uint key_length)
-
-
-
- /* Length of used key */
-{
- int k_length;
- uint length;
- uchar *pos,*end;
- reg1 N_KEYSEG *keyseg;
- enum ha_base_keytype type;
- DBUG_ENTER("_nisam_pack_key");
-
- if ((k_length=(int) key_length) <= 0)
- k_length=N_MAX_KEY_BUFF;
-
- for (keyseg=info->s->keyinfo[keynr].seg ;
- keyseg->base.type && k_length >0;
- k_length-=keyseg->base.length, old+=keyseg->base.length, keyseg++)
- {
- length=min((uint) keyseg->base.length,(uint) k_length);
- type=(enum ha_base_keytype) keyseg->base.type;
- if (keyseg->base.flag & HA_SPACE_PACK)
- {
- pos=old; end=pos+length;
- if (type != HA_KEYTYPE_NUM)
- {
- while (end > pos && end[-1] == ' ')
- end--;
- }
- else
- {
- while (pos < end && pos[0] == ' ')
- pos++;
- }
- *key++ = (uchar) (length=(uint) (end-pos));
- memcpy((byte*) key,pos,(size_t) length);
- }
- else
- memcpy((byte*) key,old,(size_t) length);
- if (!use_strnxfrm(default_charset_info))
- {
- if (type == HA_KEYTYPE_TEXT)
- my_strnxfrm(default_charset_info,(uchar*) key,length,
- (uchar*) key,length);
- }
- key+= length;
- }
- if (!keyseg->base.type)
- {
- if (k_length >= 0) /* Hole key */
- key_length=0;
- }
- else
- { /* Part-key ; fill with null */
- length= (uint) -k_length; /* unused part of last key */
- do
- {
- length+= (keyseg->base.flag & HA_SPACE_PACK) ? 1 :
- keyseg->base.length;
- keyseg++;
- } while (keyseg->base.type);
- bzero((byte*) key,length);
- }
- DBUG_RETURN(key_length); /* Return part-keylength */
-} /* _nisam_pack_key */
-
-
- /* Put a key in record */
- /* Used when only-keyread is wanted */
-
-static void _nisam_put_key_in_record(register N_INFO *info, uint keynr, byte *record)
-{
- uint length;
- reg2 byte *key;
- byte *pos;
- reg1 N_KEYSEG *keyseg;
- DBUG_ENTER("_nisam_put_key_in_record");
-
- key=(byte*) info->lastkey;
- for (keyseg=info->s->keyinfo[keynr].seg ; keyseg->base.type ;keyseg++)
- {
- if (keyseg->base.flag & HA_SPACE_PACK)
- {
- length= (uint) (uchar) *key++;
- pos= record+keyseg->base.start;
- if (keyseg->base.type != (int) HA_KEYTYPE_NUM)
- {
- memcpy(pos,key,(size_t) length);
- bfill(pos+length,keyseg->base.length-length,' ');
- }
- else
- {
- bfill(pos,keyseg->base.length-length,' ');
- memcpy(pos+keyseg->base.length-length,key,(size_t) length);
- }
- key+=length;
- }
- else
- {
- memcpy(record+keyseg->base.start,(byte*) key,
- (size_t) keyseg->base.length);
- key+= keyseg->base.length;
- }
- }
- DBUG_VOID_RETURN;
-} /* _nisam_put_key_in_record */
-
-
- /* Here when key reads are used */
-
-int _nisam_read_key_record(N_INFO *info, ulong filepos, byte *buf)
-{
- VOID(_nisam_writeinfo(info,0));
- if (filepos != NI_POS_ERROR)
- {
- if (info->lastinx >= 0)
- { /* Read only key */
- _nisam_put_key_in_record(info,(uint) info->lastinx,buf);
- info->update|= HA_STATE_AKTIV; /* We should find a record */
- return 0;
- }
- my_errno=HA_ERR_WRONG_INDEX;
- return(-1);
- }
- return(-1); /* Wrong data to read */
-}
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