Import libcds.

[SXSI/libcds.git] / src / static_sequence / wt_node_leaf.cpp

diff --git a/src/static_sequence/wt_node_leaf.cpp b/src/static_sequence/wt_node_leaf.cpp
new file mode 100644 (file)
index 0000000..9d15193
--- /dev/null
+++ b/src/static_sequence/wt_node_leaf.cpp
@@ -0,0 +1,111 @@
+/* wt_node_leaf.cpp
+ * Copyright (C) 2008, Francisco Claude, all rights reserved.
+ *
+ * wt_node_leaf
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
+#include <wt_node_leaf.h>
+
+wt_node_leaf::wt_node_leaf(uint symbol, uint count) {
+       this->symbol = symbol;
+       this->count = count;
+}
+
+wt_node_leaf::wt_node_leaf() {}
+
+wt_node_leaf::~wt_node_leaf() {}
+
+uint wt_node_leaf::rank(uint symbol, uint pos, uint l, wt_coder * c) {
+       if(symbol!=this->symbol) return 0;
+       pos++;
+       return pos;
+}
+
+uint wt_node_leaf::rankLessThan(uint &symbol, uint pos) {
+//    std::cout <<"this-symbol: " << (uchar)this->symbol << ", symbol = " << (uchar)symbol << ", pos = " << pos << std::endl;
+    if (pos == (uint)-1 || symbol < this->symbol)
+        return -1;
+    symbol = this->symbol;
+    pos++;
+    return pos;
+}
+
+uint wt_node_leaf::select(uint symbol, uint pos, uint l, wt_coder * c) {
+       if(symbol!=this->symbol) return (uint)-1;
+       if(pos==0 || pos>count) return (uint)-1;
+       return pos;
+}
+
+uint wt_node_leaf::access(uint pos) {
+//   std::cout <<"this-symbol: " << (uchar)this->symbol << ", pos = " << pos << std::endl;
+
+       return symbol;
+}
+
+uint wt_node_leaf::access(uint pos, uint &rank) {
+    rank = pos+1;
+    return symbol;
+}
+
+void wt_node_leaf::access(vector<int> &result, uint i, uint j, uint min, uint max, uint l, uint pivot)
+{
+//    std::cout << "At l = " << l << ", [" << i << ", " << j  << "], [" << min << ", " << max << "], symbol = " << symbol << std::endl;
+    
+    if (i <= j && symbol >= min && symbol <= max)
+        result.push_back((int)symbol);
+}
+
+void wt_node_leaf::access(vector<int> &result, uint i, uint j)
+{
+//    std::cout << "At l = " << l << ", [" << i << ", " << j  << "], [" << min << ", " << max << "], symbol = " << symbol << std::endl;
+    
+    if (i <= j)
+        result.push_back((int)symbol);
+}
+
+uint wt_node_leaf::access(uint i, uint j, uint min, uint max, uint l, uint pivot)
+{
+//    std::cout << "At l = " << l << ", [" << i << ", " << j  << "], [" << min << ", " << max << "], symbol = " << symbol << std::endl;
+    
+    if (i <= j && symbol >= min && symbol <= max)
+        return 1;
+    return 0;
+}
+
+uint wt_node_leaf::size() {
+       return sizeof(wt_node_leaf);
+}
+
+uint wt_node_leaf::save(FILE *fp) {
+  uint wr = WT_NODE_LEAF_HDR;
+  wr = fwrite(&wr,sizeof(uint),1,fp);
+  wr += fwrite(&count,sizeof(uint),1,fp);
+  wr += fwrite(&symbol,sizeof(uint),1,fp);
+  return wr-3;
+}
+
+wt_node_leaf * wt_node_leaf::load(FILE *fp) {
+  uint rd;
+  if(fread(&rd,sizeof(uint),1,fp)!=1) return NULL;
+  if(rd!=WT_NODE_LEAF_HDR) return NULL;
+  wt_node_leaf * ret = new wt_node_leaf();
+  rd = fread(&(ret->count),sizeof(uint),1,fp);
+  rd += fread(&(ret->symbol),sizeof(uint),1,fp);
+  if(rd!=2) { delete ret; return NULL; }
+  return ret;
+}