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Merge from trunk rev 1424: Move expression tree node labeling into expr

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node themselves to reduce memory usage and make node labeling per dfa
rather than global.

Nominated-by: John Johansen <john.johansen@canonical.com>
Acked-By: Steve Beattie <sbeattie@ubuntu.com>
This commit is contained in:
Steve Beattie 2010-07-12 15:53:51 -07:00
parent 8187d02864
commit ac1a585bbe
1 changed files with 7 additions and 7 deletions
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14
parser/libapparmor_re/regexp.y
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@ -102,6 +102,7 @@
/* child 0 is left, child 1 is right */
Node *child[2];
unsigned int label; /* unique number for debug etc */
/**
* We need reference counting for AcceptNodes: sharing AcceptNodes
* avoids introducing duplicate States with identical accept values.
@ -1208,12 +1209,11 @@ regexp_error(Node **, const char *text, const char *error)
* Assign a consecutive number to each node. This is only needed for
* pretty-printing the debug output.
*/
map<Node *, int> node_label;
void label_nodes(Node *root)
{
int nodes = 0;
for (depth_first_traversal i(root); i; i++)
node_label.insert(make_pair(*i, nodes++));
i->label = nodes++;
}
/**
@ -1225,7 +1225,7 @@ ostream& operator<<(ostream& os, const State& state)
if (!state.empty()) {
State::iterator i = state.begin();
for(;;) {
os << node_label[*i];
os << (*i)->label;
if (++i == state.end())
break;
os << ',';
@ -1240,15 +1240,15 @@ ostream& operator<<(ostream& os, const State& state)
*/
void dump_syntax_tree(ostream& os, Node *node) {
for (depth_first_traversal i(node); i; i++) {
os << node_label[*i] << '\t';
os << i->label << '\t';
if ((*i)->child[0] == 0)
os << **i << '\t' << (*i)->followpos << endl;
else {
if ((*i)->child[1] == 0)
os << node_label[(*i)->child[0]] << **i;
os << (*i)->child[0]->label << **i;
else
os << node_label[(*i)->child[0]] << **i
<< node_label[(*i)->child[1]];
os << (*i)->child[0]->label << **i
<< (*i)->child[1]->label;
os << '\t' << (*i)->firstpos
<< (*i)->lastpos << endl;
}