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936c84989e
include/my_handler.h: A fix (bug #10179: error in default value setting). Proper masks added: we should not touch extra bits. sql/key.cc: A fix (bug #10179: error in default value setting). Unnecessary code removed. sql/unireg.cc: A fix (bug #10179: error in default value setting). 1. we should take into account uneven bits (for bit fields) stored among NULL bits. 2. changed code which sets NULL bits for fields. 3. changed code which sets unused bits after NULL bits. 4. unused variables removed. BitKeeper/etc/logging_ok: Logging to logging@openlogging.org accepted
91 lines
3 KiB
C
91 lines
3 KiB
C
/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
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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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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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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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typedef struct st_HA_KEYSEG /* Key-portion */
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{
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CHARSET_INFO *charset;
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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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uint16 bit_pos; /* Position to bit part */
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uint16 flag;
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uint16 length; /* Keylength */
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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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uint8 bit_length; /* Length of bit part */
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} HA_KEYSEG;
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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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#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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#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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#define store_key_length_inc(key,length) \
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{ if ((length) < 255) \
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{ *(key)++=(length); } \
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else \
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{ *(key)=255; mi_int2store((key)+1,(length)); (key)+=3; } \
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}
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#define get_rec_bits(bit_ptr, bit_ofs, bit_len) \
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(((((uint16) (bit_ptr)[1] << 8) | (uint16) (bit_ptr)[0]) >> (bit_ofs)) & \
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((1 << (bit_len)) - 1))
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#define set_rec_bits(bits, bit_ptr, bit_ofs, bit_len) \
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{ \
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(bit_ptr)[0]= ((bit_ptr)[0] & ~(((1 << (bit_len)) - 1) << (bit_ofs))) | \
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((bits) << (bit_ofs)); \
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if ((bit_ofs) + (bit_len) > 8) \
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(bit_ptr)[1]= ((bit_ptr)[1] & ~((1 << ((bit_len) - 8 + (bit_ofs))) - 1)) | \
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((bits) >> (8 - (bit_ofs))); \
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}
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#define clr_rec_bits(bit_ptr, bit_ofs, bit_len) \
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set_rec_bits(0, bit_ptr, bit_ofs, bit_len)
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extern int mi_compare_text(CHARSET_INFO *, uchar *, uint, uchar *, uint ,
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my_bool, my_bool);
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extern int ha_key_cmp(register HA_KEYSEG *keyseg, register uchar *a,
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register uchar *b, uint key_length, uint nextflag,
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uint *diff_pos);
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#endif /* _my_handler_h */
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