static void linkrootchildren(Suffixtree *stree) {
Uint *rcptr, *prevnodeptr, prev = 0;
stree->alphasize = 0;
for(rcptr = stree->rootchildren;
rcptr <= stree->rootchildren + LARGESTCHARINDEX; rcptr++) {
if(*rcptr != 0) {
stree->alphasize++;
if(prev == 0) {
SETCHILD(stree->branchtab,MAKELARGE(*rcptr));
} else {
if(ISLEAF(prev)) {
stree->leaftab[GETLEAFINDEX(prev)] = *rcptr;
} else {
prevnodeptr = stree->branchtab + GETBRANCHINDEX(prev);
SETBROTHER(prevnodeptr,*rcptr);
}
}
prev = *rcptr;
}
}
if(ISLEAF(prev)) {
stree->leaftab[GETLEAFINDEX(prev)] = MAKELEAF(stree->textlen);
} else {
prevnodeptr = stree->branchtab + GETBRANCHINDEX(prev);
SETBROTHER(prevnodeptr,MAKELEAF(stree->textlen));
}
stree->leaftab[stree->textlen] = NILBIT;
}
static void insertbranchnode(Suffixtree *stree) {
Uint *ptr, *insertnodeptr, *insertleafptr, insertnodeptrbrother;
spaceforbranchtab(stree);
if(stree->headnodedepth == 0) { // head is the root
stree->rootchildren[(Uint) *(stree->headstart)]
= MAKEBRANCHADDR(stree->nextfreebranchnum);
*(stree->nextfreebranch+1) = VALIDINIT;
} else {
if(stree->insertprev == 0) { // new branch = first child
SETCHILD(stree->headnode,MAKEBRANCHADDR(stree->nextfreebranchnum));
} else {
if(ISLEAF(stree->insertprev)) { // new branch = right brother of leaf
ptr = stree->leaftab + GETLEAFINDEX(stree->insertprev);
SETLEAFBROTHER(ptr,MAKEBRANCHADDR(stree->nextfreebranchnum));
} else { // new branch = brother of branching node
SETBROTHER(stree->branchtab + GETBRANCHINDEX(stree->insertprev),
MAKEBRANCHADDR(stree->nextfreebranchnum));
}
}
}
if(ISLEAF(stree->insertnode)) { // split edge is leaf edge
insertleafptr = stree->leaftab + GETLEAFINDEX(stree->insertnode);
if (stree->tailptr == stree->sentinel ||
*(stree->headend+1) < *(stree->tailptr)) {
SETNEWCHILDBROTHER(MAKELARGE(stree->insertnode), // first child=oldleaf
LEAFBROTHERVAL(*insertleafptr)); // inherit brother
RECALLNEWLEAFADDRESS(stree->nextfreeleafptr);
SETLEAFBROTHER(insertleafptr, // new leaf =
MAKELEAF(stree->nextfreeleafnum)); // right brother of old leaf
} else {
SETNEWCHILDBROTHER(MAKELARGELEAF(stree->nextfreeleafnum), // first child=new leaf
LEAFBROTHERVAL(*insertleafptr)); // inherit brother
*(stree->nextfreeleafptr) = stree->insertnode; // old leaf = right brother of of new leaf
RECALLLEAFADDRESS(insertleafptr);
}
} else { // split edge leads to branching node
insertnodeptr = stree->branchtab + GETBRANCHINDEX(stree->insertnode);
insertnodeptrbrother = GETBROTHER(insertnodeptr);
if (stree->tailptr == stree->sentinel ||
*(stree->headend+1) < *(stree->tailptr)) {
SETNEWCHILDBROTHER(MAKELARGE(stree->insertnode), // first child new branch
insertnodeptrbrother); // inherit right brother
RECALLNEWLEAFADDRESS(stree->nextfreeleafptr);
SETBROTHER(insertnodeptr,MAKELEAF(stree->nextfreeleafnum)); // new leaf = brother of old branch
} else {
SETNEWCHILDBROTHER(MAKELARGELEAF(stree->nextfreeleafnum), // first child is new leaf
insertnodeptrbrother); // inherit brother
*(stree->nextfreeleafptr) = stree->insertnode; // new branch is brother of new leaf
RECALLBRANCHADDRESS(insertnodeptr);
}
}
SETNILBIT;
RECALLSUCC(MAKEBRANCHADDR(stree->nextfreebranchnum)); // node on s.cpp. path
stree->currentdepth = stree->headnodedepth + (Uint) (stree->headend-stree->headstart+1);
SETDEPTHEADPOS(stree->currentdepth,stree->nextfreeleafnum);
SETMAXBRANCHDEPTH(stree->currentdepth);
stree->nextfreeleafnum++;
stree->nextfreeleafptr++;
}
void rootsucclocationsstree(Suffixtree *stree,ArraySimpleloc *ll)
{
Uint headpos, leafindex, depth, distance, node, ch, *largeptr, *nodeptr;
Simpleloc *llptr;
CHECKARRAYSPACE(ll,Simpleloc,stree->alphasize+1);
for(ch = 0; ch <= UCHAR_MAX; ch++)
{
if((node = stree->rootchildren[ch]) != UNDEFINEDREFERENCE)
{
llptr = ll->spaceSimpleloc + ll->nextfreeSimpleloc++;
if(ISLEAF(node))
{
leafindex = GETLEAFINDEX(node);
llptr->textpos = leafindex;
llptr->remain = stree->textlen - leafindex;
llptr->nextnode.toleaf = true;
llptr->nextnode.address = stree->leaftab + leafindex;
} else
{
nodeptr = stree->branchtab + GETBRANCHINDEX(node);
GETBOTH(depth,headpos,nodeptr);
llptr->textpos = headpos;
llptr->remain = depth - 1;
llptr->nextnode.toleaf = false;
llptr->nextnode.address = nodeptr;
}
CHECKADDR(stree,llptr->nextnode);
}
}
}
static void insertleaf(Suffixtree *stree) {
Uint *ptr, newleaf;
newleaf = MAKELEAF(stree->nextfreeleafnum);
if(stree->headnodedepth == 0) { // head is the root
if(stree->tailptr != stree->sentinel) { // no \$-edge initially
stree->rootchildren[(Uint) *(stree->tailptr)] = newleaf;
*(stree->nextfreeleafptr) = VALIDINIT;
}
} else {
if (stree->insertprev == 0) { // newleaf = first child
*(stree->nextfreeleafptr) = GETCHILD(stree->headnode);
SETCHILD(stree->headnode,newleaf);
} else {
if(ISLEAF(stree->insertprev)) { // previous node is leaf
ptr = stree->leaftab + GETLEAFINDEX(stree->insertprev);
*(stree->nextfreeleafptr) = LEAFBROTHERVAL(*ptr);
SETLEAFBROTHER(ptr,newleaf);
} else { // previous node is branching node
ptr = stree->branchtab + GETBRANCHINDEX(stree->insertprev);
*(stree->nextfreeleafptr) = GETBROTHER(ptr);
SETBROTHER(ptr,newleaf);
}
}
}
RECALLSUCC(newleaf); // recall node on s.cppessor path of \emph{headnode}
stree->nextfreeleafnum++;
stree->nextfreeleafptr++;
}
void succlocationsstree(Suffixtree *stree,bool nosentinel,Simpleloc *loc,
ArraySimpleloc *ll)
{
Uint succdepth, succ, leafindex, distance, depth, headpos,
remain, *succptr, *largeptr, *nodeptr;
Simpleloc *llptr;
fprintf(stderr,"succlocationsstree\n");
ll->nextfreeSimpleloc = 0;
CHECKARRAYSPACE(ll,Simpleloc,stree->alphasize+1);
if(loc->remain > 0)
{
if(nosentinel && loc->nextnode.toleaf && loc->remain <= UintConst(1))
{ // at the end of leaf edge: only a\$ remains
return;
}
llptr = ll->spaceSimpleloc + ll->nextfreeSimpleloc++;
llptr->textpos = loc->textpos + 1;
llptr->remain = loc->remain - 1;
llptr->nextnode.address = loc->nextnode.address;
llptr->nextnode.toleaf = loc->nextnode.toleaf;
CHECKADDR(stree,llptr->nextnode);
return;
}
nodeptr = loc->nextnode.address;
GETONLYDEPTH(depth,nodeptr);
succ = GETCHILD(nodeptr);
do // traverse the list of successors
{
if(ISLEAF(succ)) // successor is leaf
{
leafindex = GETLEAFINDEX(succ);
remain = stree->textlen - (depth + leafindex);
if(!nosentinel || remain >= UintConst(1))
{
llptr = ll->spaceSimpleloc + ll->nextfreeSimpleloc++;
llptr->remain = remain;
llptr->textpos = depth + leafindex;
llptr->nextnode.address = stree->leaftab + leafindex;
llptr->nextnode.toleaf = true;
CHECKADDR(stree,llptr->nextnode);
}
succ = LEAFBROTHERVAL(stree->leaftab[leafindex]);
} else // successor is branch node
{
succptr = stree->branchtab + GETBRANCHINDEX(succ);
GETBOTH(succdepth,headpos,succptr); // get info for branch node
llptr = ll->spaceSimpleloc + ll->nextfreeSimpleloc++;
llptr->textpos = depth + headpos;
llptr->remain = succdepth - depth - 1;
llptr->nextnode.toleaf = false;
llptr->nextnode.address = succptr;
CHECKADDR(stree,llptr->nextnode);
succ = GETBROTHER(succptr);
}
} while(!NILPTR(succ));
}
static void int2ref(Suffixtree *stree,Reference *ref,Uint i)
{
if(ISLEAF(i))
{
ref->toleaf = true;
ref->address = stree->leaftab + GETLEAFINDEX(i);
} else
{
ref->toleaf = false;
ref->address = stree->branchtab + GETBRANCHINDEX(i);
}
}
static void scanprefix(Suffixtree *stree) {
Uint *nodeptr = NULL, *largeptr = NULL, leafindex, nodedepth, edgelen, node,
distance = 0, prevnode, prefixlen, headposition;
SYMBOL *leftborder = (SYMBOL *) NULL, tailchar, edgechar = 0;
if(stree->headnodedepth == 0) { // headnode is root
if(stree->tailptr == stree->sentinel) { // there is no \$-edge
stree->headend = NULL;
return;
}
tailchar = *(stree->tailptr);
if((node = stree->rootchildren[(Uint) tailchar]) == 0) {
stree->headend = NULL;
return;
}
if(ISLEAF(node)) { // s.cppessor edge is leaf, compare tail and leaf edge label
leftborder = stree->text + GETLEAFINDEX(node);
prefixlen = 1 + taillcp(stree,leftborder+1,stree->sentinel-1);
(stree->tailptr) += prefixlen;
stree->headstart = leftborder;
stree->headend = leftborder + (prefixlen-1);
stree->insertnode = node;
return;
}
nodeptr = stree->branchtab + GETBRANCHINDEX(node);
GETBOTH(nodedepth,headposition,nodeptr); // get info for branch node
leftborder = stree->text + headposition;
prefixlen = 1 + taillcp(stree,leftborder+1,leftborder + nodedepth - 1);
(stree->tailptr)+= prefixlen;
if(nodedepth > prefixlen) { // cannot reach the s.cppessor, fall out of tree
stree->headstart = leftborder;
stree->headend = leftborder + (prefixlen-1);
stree->insertnode = node;
return;
}
stree->headnode = nodeptr;
stree->headnodedepth = nodedepth;
}
while(True) { // \emph{headnode} is not the root
prevnode = 0;
node = GETCHILD(stree->headnode);
if(stree->tailptr == stree->sentinel) { // \$-edge
do { // there is no \$-edge, so find last s.cppessor, of which it becomes right brother
prevnode = node;
if(ISLEAF(node)) {
node = LEAFBROTHERVAL(stree->leaftab[GETLEAFINDEX(node)]);
} else {
node = GETBROTHER(stree->branchtab + GETBRANCHINDEX(node));
}
} while(!NILPTR(node));
stree->insertnode = NILBIT;
stree->insertprev = prevnode;
stree->headend = NULL;
return;
}
tailchar = *(stree->tailptr);
do { // find s.cppessor edge with firstchar = tailchar
if(ISLEAF(node)) { // s.cppessor is leaf
leafindex = GETLEAFINDEX(node);
leftborder = stree->text + (stree->headnodedepth + leafindex);
if((edgechar = *leftborder) >= tailchar) { // edge will not come later
break;
}
prevnode = node;
node = LEAFBROTHERVAL(stree->leaftab[leafindex]);
} else { // s.cppessor is branch node
nodeptr = stree->branchtab + GETBRANCHINDEX(node);
GETONLYHEADPOS(headposition,nodeptr);
leftborder = stree->text + (stree->headnodedepth + headposition);
if((edgechar = *leftborder) >= tailchar) { // edge will not come later
break;
}
prevnode = node;
node = GETBROTHER(nodeptr);
}
} while(!NILPTR(node));
if(NILPTR(node) || edgechar > tailchar) { // edge not found
stree->insertprev = prevnode; // new edge will become brother of this
stree->headend = NULL;
return;
}
if(ISLEAF(node)) { // correct edge is leaf edge, compare its label with tail
prefixlen = 1 + taillcp(stree,leftborder+1,stree->sentinel-1);
(stree->tailptr) += prefixlen;
stree->headstart = leftborder;
stree->headend = leftborder + (prefixlen-1);
stree->insertnode = node;
stree->insertprev = prevnode;
return;
}
GETDEPTHAFTERHEADPOS(nodedepth,nodeptr); // we already know headposition
edgelen = nodedepth - stree->headnodedepth;
prefixlen = 1 + taillcp(stree,leftborder+1,leftborder + edgelen - 1);
(stree->tailptr) += prefixlen;
if(edgelen > prefixlen) { // cannot reach next node
stree->headstart = leftborder;
stree->headend = leftborder + (prefixlen-1);
stree->insertnode = node;
stree->insertprev = prevnode;
return;
}
stree->headnode = nodeptr;
stree->headnodedepth = nodedepth;
}
}
static void rescan (Suffixtree *stree) {
Uint *nodeptr, *largeptr = NULL, distance = 0, node, prevnode,
nodedepth, edgelen, wlen, leafindex, headposition;
SYMBOL headchar, edgechar;
if(stree->headnodedepth == 0) { // head is the root
headchar = *(stree->headstart); // headstart is assumed to be not empty
node = stree->rootchildren[(Uint) headchar];
if(ISLEAF(node)) { // stop if s.cppessor is leaf
stree->insertnode = node;
return;
}
nodeptr = stree->branchtab + GETBRANCHINDEX(node);
GETONLYDEPTH(nodedepth,nodeptr);
wlen = (Uint) (stree->headend - stree->headstart + 1);
if(nodedepth > wlen) { // cannot reach the s.cppessor node
stree->insertnode = node;
return;
}
stree->headnode = nodeptr; // go to s.cppessor node
stree->headnodedepth = nodedepth;
if(nodedepth == wlen) { // location has been scanned
stree->headend = NULL;
return;
}
(stree->headstart) += nodedepth;
}
while(True) { // \emph{headnode} is not the root
headchar = *(stree->headstart); // \emph{headstart} is assumed to be nonempty
prevnode = 0;
node = GETCHILD(stree->headnode);
while(True) { // traverse the list of s.cppessors
if(ISLEAF(node)) { // s.cppessor is leaf
leafindex = GETLEAFINDEX(node);
edgechar = stree->text[stree->headnodedepth + leafindex];
if(edgechar == headchar) { // correct edge found
stree->insertnode = node;
stree->insertprev = prevnode;
return;
}
prevnode = node;
node = LEAFBROTHERVAL(stree->leaftab[leafindex]);
} else { // s.cppessor is branch node
nodeptr = stree->branchtab + GETBRANCHINDEX(node);
GETONLYHEADPOS(headposition,nodeptr);
edgechar = stree->text[stree->headnodedepth + headposition];
if(edgechar == headchar) { // correct edge found
break;
}
prevnode = node;
node = GETBROTHER(nodeptr);
}
}
GETDEPTHAFTERHEADPOS(nodedepth,nodeptr); // get info about s.cpp node
edgelen = nodedepth - stree->headnodedepth;
wlen = (Uint) (stree->headend - stree->headstart + 1);
if(edgelen > wlen) { // cannot reach the s.cpp node
stree->insertnode = node;
stree->insertprev = prevnode;
return;
}
stree->headnode = nodeptr; // go to the s.cppessor node
stree->headnodedepth = nodedepth;
if(edgelen == wlen) { // location is found
stree->headend = NULL;
return;
}
(stree->headstart) += edgelen;
}
}