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Merge bk-internal.mysql.com:/home/bk/mysql-4.1

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into mysql.com:/home/my/mysql-4.1
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monty@mysql.com
2004-10-20 18:58:01 +03:00
parent a1bd5432c4 4e63fb9891
commit b686f98f50
21 changed files with 284 additions and 47 deletions
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34
libmysql/libmysql.c
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@ -1543,6 +1543,40 @@ void my_net_local_init(NET *net)
net->max_packet_size= max(net_buffer_length, max_allowed_packet);
}
/*
This function is used to create HEX string that you
can use in a SQL statement in of the either ways:
INSERT INTO blob_column VALUES (0xAABBCC); (any MySQL version)
INSERT INTO blob_column VALUES (X'AABBCC'); (4.1 and higher)
The string in "from" is encoded to a HEX string.
The result is placed in "to" and a terminating null byte is appended.
The string pointed to by "from" must be "length" bytes long.
You must allocate the "to" buffer to be at least length*2+1 bytes long.
Each character needs two bytes, and you need room for the terminating
null byte. When mysql_hex_string() returns, the contents of "to" will
be a null-terminated string. The return value is the length of the
encoded string, not including the terminating null character.
The return value does not contain any leading 0x or a leading X' and
trailing '. The caller must supply whichever of those is desired.
*/
ulong mysql_hex_string(char *to, const char *from, ulong length)
{
char *to0= to;
const char *end;
for (end= from + length; from < end; from++)
{
*to++= _dig_vec_upper[((unsigned char) *from) >> 4];
*to++= _dig_vec_upper[((unsigned char) *from) & 0x0F];
}
*to= '\0';
return (ulong) (to-to0);
}
/*
Add escape characters to a string (blob?) to make it suitable for a insert
to should at least have place for length*2+1 chars