Re: MySQL crash with custom parser

[Clement Ho]

Here is the custom parser code that I wrote. There are only 2 function that I modified from the example.
void add_word(MYSQL_FTPARSER_PARAM *param, char *word, size_t len)
{
MYSQL_FTPARSER_BOOLEAN_INFO bool_info;

bool_info.type=FT_TOKEN_WORD;
bool_info.weight_adjust= 0;
bool_info.wasign =0;
bool_info.trunc = 0;
bool_info.prev = ' ';
bool_info.quot = 0;
if (param->mode == MYSQL_FTPARSER_FULL_BOOLEAN_INFO){
// it is a boolean search
if(*word == '+'){
// And
bool_info.yesno = 1;
word = word + 1;
len = len -1;
}else if(*word == '-'){
// NOT
bool_info.yesno = -1;
word = word + 1;
len = len -1;
}else{
// OR
bool_info.yesno = 0;
}
}else{
bool_info.yesno = 0;
}


param->mysql_add_word(param, word, len, &bool_info);
}
int simple_parser_parse(MYSQL_FTPARSER_PARAM *param)
{
char *end, *start, *docend= param->doc + param->length;

number_of_calls++;

for (end= start= param->doc;; end++)
{
if (end == docend)
{
if (end > start)
add_word(param, start, end - start);
break;
}
else if (*end == ',')
{
if (end > start)
add_word(param, start, end - start);
start= end + 1;
}
}
return(0);
}