From 70f3a5c8f1ed55a6fc96997c6cbdf4dad440f5f5 Mon Sep 17 00:00:00 2001
From: Peng Wu <alexepico@gmail.com>
Date: Fri, 29 Oct 2010 11:17:56 +0800
Subject: write phrase lookup in progress

---
 src/lookup/phrase_lookup.cpp | 27 +++++++++++++++++++++++++++
 src/lookup/phrase_lookup.h   | 14 +++++++++++++-
 2 files changed, 40 insertions(+), 1 deletion(-)

(limited to 'src/lookup')

diff --git a/src/lookup/phrase_lookup.cpp b/src/lookup/phrase_lookup.cpp
index 7c05dae..eae0662 100644
--- a/src/lookup/phrase_lookup.cpp
+++ b/src/lookup/phrase_lookup.cpp
@@ -25,3 +25,30 @@
 #include "phrase_large_table.h"
 #include "ngram.h"
 #include "phrase_lookup.h"
+
+const gfloat PhraseLookup::bigram_lambda;
+const gfloat PhraseLookup::unigram_lambda;
+
+PhraseLookup::PhraseLookup(PhraseLargeTable * phrase_table,
+                           FacadePhraseIndex * phrase_index,
+                           Bigram * bigram){
+    m_phrase_table = phrase_table;
+    m_phrase_index = phrase_index;
+    m_bigram = bigram;
+
+    m_steps_index = g_ptr_array_new();
+    m_steps_content = g_ptr_array_new();
+}
+
+
+
+
+
+bool PhraseLookup::convert_to_utf8(phrase_token_t token, /* out */ char * & phrase){
+    m_phrase_index->get_phrase_item(token, m_cache_phrase_item);
+    utf16_t buffer[MAX_PHRASE_LENGTH];
+    m_cache_phrase_item.get_phrase_string(buffer);
+    guint8 length = m_cache_phrase_item.get_phrase_length();
+    phrase = g_utf16_to_utf8(buffer, length, NULL, NULL, NULL);
+    return true;
+}
diff --git a/src/lookup/phrase_lookup.h b/src/lookup/phrase_lookup.h
index 686a7d5..0aacdbc 100644
--- a/src/lookup/phrase_lookup.h
+++ b/src/lookup/phrase_lookup.h
@@ -30,6 +30,11 @@
  */
 
 class PhraseLookup{
+private:
+    static const gfloat bigram_lambda = LAMBDA_PARAMETER;
+    static const gfloat unigram_lambda = 1 - LAMBDA_PARAMETER;
+
+    PhraseItem m_cache_phrase_item;
 protected:
     //saved varibles
     novel::PhraseLargeTable * m_phrase_table;
@@ -60,10 +65,17 @@ protected:
 
     bool final_step(MatchResults & results);
 public:
+    PhraseLookup(PhraseLargeTable * phrase_table,
+                 FacadePhraseIndex * phrase_index,
+                 Bigram * bigram);
+
+    ~PhraseLookup();
+
     /* Note: this method only accepts the characters in phrase large table. */
     bool get_best_match(int sentence_length, utf16_t sentence[], MatchResults & results);
 
-    bool convert_to_utf8(MatchResults results, /* out */ char * & result_string);
+    /* Note: free the phrase by g_free */
+    bool convert_to_utf8(phrase_token_t token, /* out */ char * & phrase);
 };
 
 #endif
-- 
cgit