Import libcds.

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

diff --git a/src/static_sequence/wt_coder_binary.cpp b/src/static_sequence/wt_coder_binary.cpp
new file mode 100644 (file)
index 0000000..a49efc8
--- /dev/null
+++ b/src/static_sequence/wt_coder_binary.cpp
@@ -0,0 +1,74 @@
+/* wt_coder_binary.cpp
+ * Copyright (C) 2008, Francisco Claude, all rights reserved.
+ *
+ * wt_coder_binary definition
+ *
+ * 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_coder_binary.h>
+using std::min;
+using std::max;
+wt_coder_binary::wt_coder_binary(uint * seq, uint n, alphabet_mapper * am) {
+       uint max_v = 0;
+  for(uint i=0;i<n;i++)
+    max_v = max(am->map(seq[i]),max_v);
+  h=bits(max_v);
+}
+
+wt_coder_binary::wt_coder_binary(uchar * seq, uint n, alphabet_mapper * am) {
+       uint max_v = 0;
+  for(uint i=0;i<n;i++)
+      max_v = max(am->map((uint)seq[i]),max_v);
+  h=bits(max_v);
+}
+
+wt_coder_binary::wt_coder_binary() {}
+
+wt_coder_binary::~wt_coder_binary() {}
+
+bool wt_coder_binary::is_set(uint symbol, uint l) {
+       if((1<<(h-l-1))&symbol) return true;
+       return false;
+}
+
+bool wt_coder_binary::done(uint symbol, uint l) {
+       if(l==h) return true;
+       return false;
+}
+
+uint wt_coder_binary::size() {
+  return sizeof(wt_coder_binary);
+}
+
+uint wt_coder_binary::save(FILE *fp) {
+  uint wr = WT_CODER_BINARY_HDR;
+  wr = fwrite(&wr,sizeof(uint),1,fp);
+  wr += fwrite(&h,sizeof(uint),1,fp);
+  return wr-2;
+}
+
+wt_coder_binary * wt_coder_binary::load(FILE *fp) {
+  uint rd;
+  if(fread(&rd,sizeof(uint),1,fp)!=1) return NULL;
+  if(rd!=WT_CODER_BINARY_HDR) return NULL;
+  wt_coder_binary * ret = new wt_coder_binary();
+  if(fread(&ret->h,sizeof(uint),1,fp)!=1) {
+    delete ret;
+    return NULL;
+  }
+  return ret;
+}