From 9c98fc93d86ab6205cb15fec14a3bc190e448ee7 Mon Sep 17 00:00:00 2001
From: Peng Wu <alexepico@gmail.com>
Date: Wed, 30 Nov 2011 17:02:43 +0800
Subject: begin to write search method

---
 src/storage/chewing_large_table.cpp | 86 +++++++++++++++++++++++++++++++++++++
 1 file changed, 86 insertions(+)

diff --git a/src/storage/chewing_large_table.cpp b/src/storage/chewing_large_table.cpp
index db803ec..1dfeb3b 100644
--- a/src/storage/chewing_large_table.cpp
+++ b/src/storage/chewing_large_table.cpp
@@ -89,3 +89,89 @@ public:
 using namespace pinyin;
 
 /* class implementation */
+
+ChewingBitmapIndexLevel::ChewingBitmapIndexLevel(pinyin_option_t options)
+    : m_options(options) {
+    memset(m_chewing_length_indexes, 0, sizeof(m_chewing_length_indexes));
+}
+
+void ChewingBitmapIndexLevel::reset() {
+    for (int k = CHEWING_ZERO_INITIAL; k < CHEWING_NUMBER_OF_INITIALS; ++k)
+        for (int l = CHEWING_ZERO_MIDDLE; l < CHEWING_NUMBER_OF_MIDDLES; ++l)
+            for (int m = CHEWING_ZERO_FINAL; m < CHEWING_NUMBER_OF_FINALS; ++m)
+                for (int n = CHEWING_ZERO_TONE; n < CHEWING_NUMBER_OF_TONES;
+                     ++n) {
+                    ChewingLengthIndexLevel * length_array =
+                        m_chewing_length_indexes[k][l][m][n];
+                    if (length_array)
+                        delete length_array;
+                }
+}
+
+
+/* search methods */
+
+int ChewingBitmapIndexLevel::search(int phrase_length,
+                                    /* in */ ChewingKey keys[],
+                                    /* out */ PhraseIndexRanges ranges) const {
+    assert(phrase_length > 0);
+    return initial_level_search(phrase_length, keys, ranges);
+}
+
+int ChewingBitmapIndexLevel::initial_level_search (int phrase_length,
+    /* in */ ChewingKey keys[], /* out */ PhraseIndexRanges ranges) const {
+
+/* macros */
+#define MATCH(AMBIGUITY, ORIGIN, ANOTHER) case ORIGIN:                  \
+    {                                                                   \
+        result |= middle_and_final_level_search(ORIGIN, phrase_length,  \
+                                                keys, ranges);          \
+        if (m_options & AMBIGUITY) {                                    \
+            result |= middle_and_final_level_search(ANOTHER,            \
+                                                    phrase_length,      \
+                                                    keys, ranges);      \
+        }                                                               \
+        return result;                                                  \
+    }
+
+    /* deal with ambiguities */
+    int result = SEARCH_NONE;
+    const ChewingKey & first_key = keys[0];
+
+    switch(first_key.m_initial) {
+        MATCH(PINYIN_AMB_C_CH, CHEWING_C, CHEWING_CH);
+        MATCH(PINYIN_AMB_C_CH, CHEWING_CH, CHEWING_C);
+        MATCH(PINYIN_AMB_Z_ZH, CHEWING_Z, CHEWING_ZH);
+        MATCH(PINYIN_AMB_Z_ZH, CHEWING_ZH, CHEWING_Z);
+        MATCH(PINYIN_AMB_S_SH, CHEWING_S, CHEWING_SH);
+        MATCH(PINYIN_AMB_S_SH, CHEWING_SH, CHEWING_S);
+        MATCH(PINYIN_AMB_L_R, CHEWING_R, CHEWING_L);
+        MATCH(PINYIN_AMB_L_N, CHEWING_N, CHEWING_L);
+        MATCH(PINYIN_AMB_F_H, CHEWING_F, CHEWING_H);
+        MATCH(PINYIN_AMB_F_H, CHEWING_H, CHEWING_F);
+        MATCH(PINYIN_AMB_G_K, CHEWING_G, CHEWING_K);
+        MATCH(PINYIN_AMB_G_K, CHEWING_K, CHEWING_G);
+
+    case CHEWING_L:
+        {
+            result |= middle_and_final_level_search
+                (CHEWING_L, phrase_length, keys, ranges);
+
+            if (m_options & PINYIN_AMB_L_N)
+                result |= middle_and_final_level_search
+                    (CHEWING_N, phrase_length, keys,ranges);
+
+            if (m_options & PINYIN_AMB_L_R)
+                result |= middle_and_final_level_search
+                    (CHEWING_R, phrase_length, keys, ranges);
+            return result;
+        }
+    default:
+        {
+            return middle_and_final_level_search
+                ((ChewingInitial) first_key.m_initial,
+                 phrase_length, keys, ranges);
+        }
+    }
+#undef MATCH
+}
-- 
cgit