3 files changed, 38 insertions, 7 deletions

diff --git a/src/storage/phrase_index.cpp b/src/storage/phrase_index.cpp
index c122803..d7fb4fd 100644
--- a/src/storage/phrase_index.cpp
+++ b/src/storage/phrase_index.cpp
@@ -327,3 +327,27 @@ bool FacadePhraseIndex::load_text(guint8 phrase_index, FILE * infile){
     m_total_freq += m_sub_phrase_indices[phrase_index]->get_phrase_index_total_freq();
     return true;
 }
+
+int FacadePhraseIndex::get_range(guint8 phrase_index, /* out */ PhraseIndexRange & range){
+    SubPhraseIndex * sub_phrase = m_sub_phrase_indices[phrase_index];
+    if ( !sub_phrase )
+        return ERROR_NO_SUB_PHRASE_INDEX;
+
+    int result = sub_phrase->get_range(range);
+    if ( result )
+        return result;
+
+    range.m_range_begin = PHRASE_INDEX_MAKE_TOKEN(phrase_index, range.m_range_begin);
+    range.m_range_end = PHRASE_INDEX_MAKE_TOKEN(phrase_index, range.m_range_end);
+    return ERROR_OK;
+}
+
+int SubPhraseIndex::get_range(/* out */ PhraseIndexRange & range){
+    const table_offset_t * begin = (const table_offset_t *)m_phrase_index.begin();
+    const table_offset_t * end = (const table_offset_t *)m_phrase_index.end();
+
+    range.m_range_begin = 0;
+    range.m_range_end = end - begin;
+
+    return ERROR_OK;
+}
diff --git a/src/storage/phrase_index.h b/src/storage/phrase_index.h
index 0b532b1..3f94bd3 100755
--- a/src/storage/phrase_index.h
+++ b/src/storage/phrase_index.h
@@ -161,10 +161,14 @@ public:
 	}
     }    
     
+    /* binary memory chunk load/store method */
     bool load(MemoryChunk * chunk, 
 	      table_offset_t offset, table_offset_t end);
     bool store(MemoryChunk * new_chunk, 
 	       table_offset_t offset, table_offset_t & end);
+
+    /* get token range in this sub phrase */
+    int get_range(/* out */ PhraseIndexRange & range);
     
     /* Zero-gram */
     guint32 get_phrase_index_total_freq();
@@ -206,6 +210,9 @@ public:
     bool store(guint8 phrase_index, MemoryChunk * new_chunk);
     bool unload(guint8 phrase_index);
 
+    /* get each sub phrase token range with phrase_index added */
+    int get_range(guint8 phrase_index, /* out */ PhraseIndexRange & range);
+
     /* Zero-gram */
     guint32 get_phrase_index_total_freq(){
 	return m_total_freq;
diff --git a/utils/storage/export_interpolation.cpp b/utils/storage/export_interpolation.cpp
index e91fd74..43a2c61 100644
--- a/utils/storage/export_interpolation.cpp
+++ b/utils/storage/export_interpolation.cpp
@@ -53,16 +53,16 @@ int main(int argc, char * argv[]){
 void gen_unigram(FILE * output, FacadePhraseIndex * phrase_index) {
     fprintf(output, "\\1-gram\n");
     for ( size_t i = 0; i < PHRASE_INDEX_LIBRARY_COUNT; i++) {
-        /* Generate each phrase index library */
-        const phrase_token_t min = PHRASE_INDEX_MAKE_TOKEN(i, token_min);
-        const phrase_token_t max = PHRASE_INDEX_MAKE_TOKEN(i, token_max);
+
+        PhraseIndexRange range;
+        int result = phrase_index->get_range(i, range);
+        if ( result )
+            continue;
 
         PhraseItem item;
-        for ( size_t j = min; j < max; j++) {
+        for ( size_t j = range.m_range_begin; j < range.m_range_end; j++) {
             int result = phrase_index->get_phrase_item(j, item);
-            if ( result == ERROR_NO_SUB_PHRASE_INDEX ||
-                 result == ERROR_OUT_OF_RANGE)
-                break;
+
             if ( result == ERROR_NO_ITEM )
                 continue;
             assert( result == ERROR_OK);