bool cGraphMaster::isMatchWildcard(const InputIterator& input, const InputIterator& pattern, const unsigned long& rec) {
if (input.isDone()) { if (pattern.isDone()) return true; else return false; }
else {
if (pattern.isDone()) return true;
else {
InputIterator input_copy(input);
do { if (isMatch(input_copy, pattern, rec+1)) return true; input_copy++; } while(!input_copy.isDone());
return false;
}
}
return false;
}
bool cGraphMaster::getMatch(InputIterator input, NodeType curr_type, const NodeVec& tree, MatcherStruct& ms, unsigned long rec) {
// save head of input and advance iterator
string input_front = *input;
input++;
//cout<<"tree.front().key="<<tree.front().key<<endl;
_DBG_CODE(msg_dbg() << "[" << rec << "]getMatch(" << curr_type << ") HEAD: [" << input_front << "] last input?:" << boolalpha << input.isDone() << endl);
/** FIRST WILDCARD: try to match the '_' wildcard **/
if (tree.front().key == "_") {
_DBG_CODE(msg_dbg() << "[" << rec << "]" << "Looking in '_'" << endl);
if (getMatchWildcard(input, curr_type, tree.front(), ms, rec, input_front)) { if (ms.log) ms.logMatch("_", curr_type); return true; }
}
/** KEYS: if wildcard didn't matched, look for specific matching keys against current input_front **/
_DBG_CODE(msg_dbg() << "[" << rec << "]" << "KEYS" << endl);
Node tmp_node;
tmp_node.key = input_front;
NodeVec::const_iterator it = lower_bound(tree.begin(), tree.end(), tmp_node);
// if there was a match
if (it != tree.end() && it->key == input_front) {
// if there are more tokens on input
if (!input.isDone()) {
// if I have something to match with, then look for a match
if (!it->same_childs.empty()) {
if (getMatch(input, curr_type, it->same_childs, ms, rec+1)) { if (ms.log) ms.logMatch(it->key, curr_type); return true; }
}
}
// else, this is the last token
else {
// get the the next type of nodes to match if necessary
list<string> match_list;
if (curr_type != NODE_TOPIC && !it->diff_childs.empty()) ms.user.getMatchList(NodeType(curr_type+1), match_list);
// if in previous situation check if there's a match deeper
if (curr_type != NODE_TOPIC && !it->diff_childs.empty() &&
getMatch(match_list, nextNodeType(curr_type), it->diff_childs, ms, rec+1))
{
if (ms.log) ms.logMatch(it->key, curr_type); return true;
}
// if I'm in the final type of nodes, it needs to be a leaf to have a match
else if (curr_type == NODE_TOPIC && !it->templ.empty()) {
ms.templ = it->templ;
if (ms.log) ms.logMatch(it->key, curr_type);
return true;
}
}
}
/** LAST WILDCARD: if above didn't matched repeat procedure for '_' **/
if (tree.back().key == "*") {
_DBG_CODE(msg_dbg() << "[" << rec << "]" << "Looking in '*'" << endl);
if (getMatchWildcard(input, curr_type, tree.back(), ms, rec, input_front)) { if (ms.log) ms.logMatch("*", curr_type); return true; }
}
return false;
}
// Reduced version of the matching algorithm found on graphmaster.cpp, look there for a thorough explanation of the code
// This version doesn't have to handle with different node types. The pattern is just a list, not a tree, so it is much easier
bool cGraphMaster::isMatch(InputIterator input, InputIterator pattern, unsigned long rec) {
string input_head(*input);
string patt_head(*pattern);
input++; pattern++;
if (patt_head == "_" && isMatchWildcard(input, pattern, rec)) return true;
if (patt_head == input_head) {
if (input.isDone()) { if (pattern.isDone()) return true; else return false; }
else {
if (pattern.isDone()) return false;
else {
if (isMatch(input, pattern, rec+1)) return true;
else return false;
}
}
}
if (patt_head == "*" && isMatchWildcard(input, pattern, rec)) return true;
return false;
}
bool cGraphMaster::getMatchWildcard(const InputIterator& input, const NodeType& curr_type, const Node& tree_frontback, MatcherStruct& ms, const unsigned long& rec, const string& input_front) {
// add the head token to the <*star/>, will remove it if it didn't matched later
StarIt it = ms.sh.AddStar(input_front, curr_type);
// if this is not the last token of input
if (!input.isDone()) {
// if this is the last node of the path, then it is a match (save the star and then proceed to match the next node type)
if (tree_frontback.same_childs.empty()) {
for (InputIterator input_copy(input); !input_copy.isDone(); input_copy++) *it += string(" ") + *input_copy;
}
// it isn't, so try matching this token with the wildcard and match the rest in a deeper recursion,
// after that start making a bigger match for current wildcard, until all trailing input is matched against this wildcard
else {
InputIterator input_copy(input);
do {
if (getMatch(input_copy, curr_type, tree_frontback.same_childs, ms, rec+1)) return true;
*it += string(" ") + *input_copy; input_copy++;
} while(!input_copy.isDone());
}
}
// this is reached if the match is in this recursion level (the deepest level will set the template and return true,
// so I don't have to do anything but pass the 'true' if getMatch() returns true)
// This situation is because either:
// a) one token of input (sure match, I have to continue the matching job deeper)
// b) more than one token of input and:
// b.1) trailing wildcard (sure match, eats all available input)
// b.2) the wildcard couldn't be used to match just a part of the trailing input, so it matches ALL the trailing input
// if i'm not in the final type (ie: not matching the topic) of node and there are other type of nodes I
// should get the next type of nodes to match
list<string> match_list;
if (curr_type != NODE_TOPIC && !tree_frontback.diff_childs.empty())
ms.user.getMatchList(NodeType(curr_type+1), match_list);
// so, If I'm in the previous situation AND there's a match with the current match list I should return 'there is a match'
if (curr_type != NODE_TOPIC && !tree_frontback.diff_childs.empty() &&
getMatch(match_list, nextNodeType(curr_type), tree_frontback.diff_childs, ms, rec+1)) return true;
// if not, I need to see if I'm matching the topic AND I reached a possible leaf, if so I'm all done, set the template
else if (curr_type == NODE_TOPIC && !tree_frontback.templ.empty()) { ms.templ = tree_frontback.templ; return true; }
// If I reach here, then there was no match anywere, so I remove the previously added token from <*star>
ms.sh.DelStar(it, curr_type);
return false;
}
