2002-04-25 10:36:55 +02:00
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/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
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2003-01-21 19:24:34 +01:00
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2002-04-25 10:36:55 +02:00
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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2003-01-21 19:24:34 +01:00
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2002-04-25 10:36:55 +02:00
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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2003-01-21 19:24:34 +01:00
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2002-04-25 10:36:55 +02:00
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You should have received a copy of the GNU Library General Public
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License along with this library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
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MA 02111-1307, USA */
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#ifndef _my_handler_h
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#define _my_handler_h
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#include "my_global.h"
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#include "my_base.h"
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#include "m_ctype.h"
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#include "myisampack.h"
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2002-04-25 12:10:29 +02:00
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typedef struct st_HA_KEYSEG /* Key-portion */
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2002-04-25 10:36:55 +02:00
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{
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uint8 type; /* Type of key (for sort) */
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uint8 language;
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uint8 null_bit; /* bitmask to test for NULL */
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uint8 bit_start,bit_end; /* if bit field */
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uint16 flag;
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uint16 length; /* Keylength */
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uint32 start; /* Start of key in record */
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uint32 null_pos; /* position to NULL indicator */
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CHARSET_INFO *charset;
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2002-04-25 12:10:29 +02:00
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} HA_KEYSEG;
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2002-04-25 10:36:55 +02:00
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#define get_key_length(length,key) \
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{ if ((uchar) *(key) != 255) \
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length= (uint) (uchar) *((key)++); \
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else \
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{ length=mi_uint2korr((key)+1); (key)+=3; } \
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}
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2003-01-21 19:24:34 +01:00
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#define get_key_length_rdonly(length,key) \
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{ if ((uchar) *(key) != 255) \
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length= ((uint) (uchar) *((key))); \
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else \
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{ length=mi_uint2korr((key)+1); } \
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}
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2002-04-25 10:36:55 +02:00
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#define get_key_pack_length(length,length_pack,key) \
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{ if ((uchar) *(key) != 255) \
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{ length= (uint) (uchar) *((key)++); length_pack=1; }\
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else \
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{ length=mi_uint2korr((key)+1); (key)+=3; length_pack=3; } \
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}
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2002-05-21 18:54:08 +02:00
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extern int mi_compare_text(CHARSET_INFO *, uchar *, uint, uchar *, uint ,
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my_bool);
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2002-04-25 12:10:29 +02:00
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extern int ha_key_cmp(register HA_KEYSEG *keyseg, register uchar *a,
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2002-05-21 18:54:08 +02:00
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register uchar *b, uint key_length, uint nextflag,
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uint *diff_pos);
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2002-04-25 10:36:55 +02:00
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#endif /* _my_handler_h */
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