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/* Copyright (C) 2003 MySQL AB
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
/* Some useful string utility functions used by the MySQL server */
#include <config.h>
#include <drizzled/typelib.h>
#include <drizzled/charset_info.h>
#include <drizzled/global_charset_info.h>
namespace drizzled
{
/*
Return bitmap for strings used in a set
SYNOPSIS
find_set()
lib Strings in set
str Strings of set-strings separated by ','
err_pos If error, set to point to start of wrong set string
err_len If error, set to the length of wrong set string
set_warning Set to 1 if some string in set couldn't be used
NOTE
We delete all end space from str before comparison
RETURN
bitmap of all sets found in x.
set_warning is set to 1 if there was any sets that couldn't be set
*/
static const char field_separator=',';
uint64_t st_typelib::find_set(const char *str, uint32_t length,
const CHARSET_INFO * const cs,
char **err_pos, uint32_t *err_len, bool *set_warning) const
{
const CHARSET_INFO * const strip= cs ? cs : &my_charset_utf8_general_ci;
const char *end= str + strip->cset->lengthsp(strip, str, length);
uint64_t found= 0;
*err_pos= 0; // No error yet
if (str != end)
{
const char *start= str;
for (;;)
{
const char *pos= start;
uint32_t var_len;
int mblen= 1;
for (; pos != end && *pos != field_separator; pos++)
{}
var_len= (uint32_t) (pos - start);
uint32_t find= cs ? find_type2(start, var_len, cs) : find_type(start, var_len, false);
if (!find)
{
*err_pos= (char*) start;
*err_len= var_len;
*set_warning= 1;
}
else
found|= ((int64_t) 1 << (find - 1));
if (pos >= end)
break;
start= pos + mblen;
}
}
return found;
}
/*
Function to find a string in a TYPELIB
(Same format as mysys/typelib.c)
SYNOPSIS
find_type()
lib TYPELIB (struct of pointer to values + count)
find String to find
length Length of string to find
part_match Allow part matching of value
RETURN
0 error
> 0 position in TYPELIB->type_names +1
*/
uint32_t st_typelib::find_type(const char *find, uint32_t length, bool part_match) const
{
uint32_t found_count=0, found_pos=0;
const char *end= find+length;
const char *i;
const char *j;
for (uint32_t pos= 0 ; (j= type_names[pos++]) ; )
{
for (i=find ; i != end &&
my_toupper(system_charset_info,*i) ==
my_toupper(system_charset_info,*j) ; i++, j++) ;
if (i == end)
{
if (! *j)
return(pos);
found_count++;
found_pos= pos;
}
}
return(found_count == 1 && part_match ? found_pos : 0);
}
/*
Find a string in a list of strings according to collation
SYNOPSIS
find_type2()
lib TYPELIB (struct of pointer to values + count)
x String to find
length String length
cs Character set + collation to use for comparison
NOTES
RETURN
0 No matching value
>0 Offset+1 in typelib for matched string
*/
uint32_t st_typelib::find_type2(const char *x, uint32_t length, const CHARSET_INFO *cs) const
{
if (!count)
return 0;
const char *j;
for (int pos=0 ; (j= type_names[pos]) ; pos++)
{
if (!my_strnncoll(cs, (const unsigned char*) x, length,
(const unsigned char*) j, type_lengths[pos]))
return pos + 1;
}
return 0;
} /* find_type */
} /* namespace drizzled */
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