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Merge moonbone.local:/home/evgen/bk-trees/mysql-5.0-opt

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into moonbone.local:/work/merge-5.1
This commit is contained in:
evgen@moonbone.local 2006-06-30 16:10:26 +04:00
commit a989f7261e
10 changed files with 539 additions and 18 deletions
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32
strings/ctype-mb.c
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@ -527,27 +527,20 @@ my_bool my_like_range_mb(CHARSET_INFO *cs,
char *min_str,char *max_str,
uint *min_length,uint *max_length)
{
uint mblen;
const char *end= ptr + ptr_length;
char *min_org= min_str;
char *min_end= min_str + res_length;
char *max_end= max_str + res_length;
uint charlen= res_length / cs->mbmaxlen;
uint maxcharlen= res_length / cs->mbmaxlen;
for (; ptr != end && min_str != min_end && charlen > 0 ; ptr++, charlen--)
for (; ptr != end && min_str != min_end && maxcharlen ; maxcharlen--)
{
/* We assume here that escape, w_any, w_namy are one-byte characters */
if (*ptr == escape && ptr+1 != end)
{
ptr++; /* Skip escape */
*min_str++= *max_str++ = *ptr;
continue;
}
if (*ptr == w_one || *ptr == w_many) /* '_' and '%' in SQL */
{
charlen= my_charpos(cs, min_org, min_str, res_length/cs->mbmaxlen);
if (charlen < (uint) (min_str - min_org))
min_str= min_org + charlen;
ptr++; /* Skip escape */
else if (*ptr == w_one || *ptr == w_many) /* '_' and '%' in SQL */
{
/*
Calculate length of keys:
'a\0\0... is the smallest possible string when we have space expand
@ -571,7 +564,16 @@ my_bool my_like_range_mb(CHARSET_INFO *cs,
pad_max_char(cs, max_str, max_end);
return 0;
}
*min_str++= *max_str++ = *ptr;
if ((mblen= my_ismbchar(cs, ptr, end)) > 1)
{
if (ptr+mblen > end || min_str+mblen > min_end)
break;
while (mblen--)
*min_str++= *max_str++= *ptr++;
}
else
*min_str++= *max_str++= *ptr++;
}
*min_length= *max_length = (uint) (min_str - min_org);