1 files changed, 89 insertions, 0 deletions
diff --git a/fsa/queryproc/count_plain_grams.cpp b/fsa/queryproc/count_plain_grams.cpp
new file mode 100644
index 00000000000..197c958149b
--- /dev/null
+++ b/fsa/queryproc/count_plain_grams.cpp
@@ -0,0 +1,89 @@
+// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+#include <iostream>
+#include <iomanip>
+#include <map>
+#include <string>
+
+#include "fsa.h"
+#include "permuter.h"
+#include "selector.h"
+#include "ngram.h"
+#include "base64.h"
+#include "wordchartokenizer.h"
+
+using namespace fsa;
+
+unsigned int gram_count(unsigned int mg, unsigned int q)
+{
+  unsigned int i,j,c1,c2,ct=0;
+
+  for(i=2;i<=mg;i++){
+    c1=1;c2=1;
+    for(j=(i>q-i)?(i+1):(q-i+1);j<=q;j++){
+      c1*=j;
+      c2*=(q-j)+1;
+    }
+    ct+=c1/c2;
+  }
+  return ct;
+}
+
+int main(int argc, char **argv)
+{
+  const unsigned int MAXQUERY = 10;
+  const unsigned int MAXGRAM  = 6;
+
+  Permuter p;
+  NGram freq_s,query;
+  WordCharTokenizer tokenizer(WordCharTokenizer::PUNCTUATION_WHITESPACEONLY);
+  unsigned int freq;
+  Selector s;
+  std::string qstr;
+  unsigned int qlen,glen;
+
+  if(argc!=2){
+    std::cerr << "usage: " << argv[0] << " fsa_file" << std::endl;
+    exit(1);
+  }
+
+  FSA fsa(argv[1]);
+  FSA::State state(fsa);
+  std::map<std::string,unsigned int> grams,gq;
+  std::map<std::string,unsigned int>::iterator grams_it,gq_it;
+  std::string gram_str;
+
+  while(!std::cin.eof()){
+    getline(std::cin,qstr);
+    query.set(qstr,tokenizer,1,-1);
+    qlen = query.length();
+    if(2<=qlen && qlen<=MAXQUERY){
+      freq_s.set(qstr,tokenizer,0,1);
+      freq=atoi(freq_s[0].c_str());
+      gq.clear();
+      for(unsigned int i=0;i<qlen-1;i++){
+        for(unsigned int j=2;j<=MAXGRAM&&i+j<=qlen;j++){
+          state.startWord(query[i]);
+          for(unsigned int k=1;state.isValid()&&k<j;k++){
+            state.deltaWord(query[i+k]);
+          }
+          if(state.isFinal()){
+            gram_str = query.join(" ",i,j);
+            gq[gram_str]=freq;
+          }
+        }
+      }
+      for(gq_it=gq.begin();gq_it!=gq.end();++gq_it){
+        grams_it=grams.find(gq_it->first);
+        if(grams_it!=grams.end())
+          grams[gq_it->first]=grams_it->second+gq_it->second;
+        else
+          grams[gq_it->first]=gq_it->second;
+      }
+    }
+  }
+
+  for(grams_it=grams.begin();grams_it!=grams.end();++grams_it)
+    std::cout << grams_it->first << '\t' << grams_it->second << std::endl;
+
+  return 0;
+}