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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; either version 2 of the License, or
(at your option) any later version.
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
/* Some useful string utility functions used by the MySQL server */
#include "mysql_priv.h"
/*
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=',';
ulonglong find_set(TYPELIB *lib, const char *str, uint length, char **err_pos,
uint *err_len, bool *set_warning)
{
const char *end= str + length;
*err_pos= 0; // No error yet
while (end > str && my_isspace(system_charset_info, end[-1]))
end--;
*err_len= 0;
ulonglong found= 0;
if (str != end)
{
const char *start= str;
for (;;)
{
const char *pos= start;
uint var_len;
for (; pos != end && *pos != field_separator; pos++) ;
var_len= (uint) (pos - start);
uint find= find_type(lib, start, var_len, 0);
if (!find)
{
*err_pos= (char*) start;
*err_len= var_len;
*set_warning= 1;
}
else
found|= ((longlong) 1 << (find - 1));
if (pos == end)
break;
start= pos + 1;
}
}
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
*/
uint find_type(TYPELIB *lib, const char *find, uint length, bool part_match)
{
uint found_count=0, found_pos=0;
const char *end= find+length;
const char *i;
const char *j;
for (uint pos=0 ; (j=lib->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_count : 0);
}
/*
Check if the first word in a string is one of the ones in TYPELIB
SYNOPSIS
check_word()
lib TYPELIB
val String to check
end End of input
end_of_word Store value of last used byte here if we found word
RETURN
0 No matching value
> 1 lib->type_names[#-1] matched
end_of_word will point to separator character/end in 'val'
*/
uint check_word(TYPELIB *lib, const char *val, const char *end,
const char **end_of_word)
{
int res;
const char *ptr;
/* Fiend end of word */
for (ptr= val ; ptr < end && my_isalpha(&my_charset_latin1, *ptr) ; ptr++)
;
if ((res=find_type(lib, val, (uint) (ptr - val), 1)) > 0)
*end_of_word= ptr;
return res;
}
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