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00018 #pragma once
00019
00020 #include <drizzled/charset_info.h>
00021 #include <plugin/myisam/myisampack.h>
00022
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00025
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00032
00033 #define HA_MAX_POSSIBLE_KEY 255
00034
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00038
00039 #define HA_MAX_KEY_LENGTH 1332
00040 #define HA_MAX_KEY_SEG 16
00041
00042 #define HA_MAX_POSSIBLE_KEY_BUFF (HA_MAX_KEY_LENGTH + 24+ 6+6)
00043 #define HA_MAX_KEY_BUFF (HA_MAX_KEY_LENGTH+HA_MAX_KEY_SEG*6+8+8)
00044
00045 typedef struct st_HA_KEYSEG
00046 {
00047 const drizzled::CHARSET_INFO *charset;
00048 uint32_t start;
00049 uint32_t null_pos;
00050 uint16_t bit_pos;
00051 uint16_t flag;
00052 uint16_t length;
00053 uint8_t type;
00054 uint8_t language;
00055 uint8_t null_bit;
00056 uint8_t bit_start,bit_end;
00057 uint8_t bit_length;
00058 } HA_KEYSEG;
00059
00060 #define get_key_length(length,key) \
00061 { if (*(unsigned char*) (key) != 255) \
00062 length= (uint) *(unsigned char*) ((key)++); \
00063 else \
00064 { length= mi_uint2korr((key)+1); (key)+=3; } \
00065 }
00066
00067 #define get_key_length_rdonly(length,key) \
00068 { if (*(unsigned char*) (key) != 255) \
00069 length= ((uint) *(unsigned char*) ((key))); \
00070 else \
00071 { length= mi_uint2korr((key)+1); } \
00072 }
00073
00074 #define get_key_pack_length(length,length_pack,key) \
00075 { if (*(unsigned char*) (key) != 255) \
00076 { length= (uint) *(unsigned char*) ((key)++); length_pack= 1; }\
00077 else \
00078 { length=mi_uint2korr((key)+1); (key)+= 3; length_pack= 3; } \
00079 }
00080
00081 #define store_key_length_inc(key,length) \
00082 { if ((length) < 255) \
00083 { *(key)++= (length); } \
00084 else \
00085 { *(key)=255; mi_int2store((key)+1,(length)); (key)+=3; } \
00086 }
00087
00088 #define size_to_store_key_length(length) ((length) < 255 ? 1 : 3)
00089
00090 #define get_rec_bits(bit_ptr, bit_ofs, bit_len) \
00091 (((((uint16_t) (bit_ptr)[1] << 8) | (uint16_t) (bit_ptr)[0]) >> (bit_ofs)) & \
00092 ((1 << (bit_len)) - 1))
00093
00094 #define set_rec_bits(bits, bit_ptr, bit_ofs, bit_len) \
00095 { \
00096 (bit_ptr)[0]= ((bit_ptr)[0] & ~(((1 << (bit_len)) - 1) << (bit_ofs))) | \
00097 ((bits) << (bit_ofs)); \
00098 if ((bit_ofs) + (bit_len) > 8) \
00099 (bit_ptr)[1]= ((bit_ptr)[1] & ~((1 << ((bit_len) - 8 + (bit_ofs))) - 1)) | \
00100 ((bits) >> (8 - (bit_ofs))); \
00101 }
00102
00103 #define clr_rec_bits(bit_ptr, bit_ofs, bit_len) \
00104 set_rec_bits(0, bit_ptr, bit_ofs, bit_len)
00105
00106 extern int ha_compare_text(const drizzled::CHARSET_INFO * const, unsigned char *, uint, unsigned char *, uint, bool, bool);
00107
00108 extern HA_KEYSEG *ha_find_null(HA_KEYSEG *keyseg, unsigned char *a);
00109 void my_handler_error_register(void);
00110 extern int ha_key_cmp(HA_KEYSEG *keyseg, unsigned char *a,unsigned char *b,
00111 uint32_t key_length,uint32_t nextflag,uint32_t *diff_length);
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00117
00118 #define portable_sizeof_char_ptr 8
00119