From dcc594e5c54f5d3bbae442434e080bab52f9b9cf Mon Sep 17 00:00:00 2001
From: Peng Wu <alexepico@gmail.com>
Date: Thu, 15 Oct 2015 11:01:35 +0800
Subject: write PinyinDirectParser2

---
 src/storage/pinyin_parser2.cpp | 99 ++++++++++++++++++++++++++++++++++++++++++
 src/storage/pinyin_parser2.h   | 19 +++++++-
 2 files changed, 117 insertions(+), 1 deletion(-)

diff --git a/src/storage/pinyin_parser2.cpp b/src/storage/pinyin_parser2.cpp
index 0a1f170..425b585 100644
--- a/src/storage/pinyin_parser2.cpp
+++ b/src/storage/pinyin_parser2.cpp
@@ -803,3 +803,102 @@ bool DoublePinyinParser2::set_scheme(DoublePinyinScheme scheme) {
 
     return false; /* no such scheme. */
 }
+
+
+PinyinDirectParser2::PinyinDirectParser2 (){
+    m_pinyin_index = pinyin_index;
+    m_pinyin_index_len = G_N_ELEMENTS(pinyin_index);
+}
+
+bool PinyinDirectParser2::parse_one_key(pinyin_option_t options,
+                                        ChewingKey & key,
+                                        const char *str, int len) const {
+    /* "'" are not accepted in parse_one_key. */
+    gchar * input = g_strndup(str, len);
+    assert(NULL == strchr(input, '\''));
+
+    guint16 tone = CHEWING_ZERO_TONE; guint16 tone_pos = 0;
+    guint16 parsed_len = len;
+    key = ChewingKey();
+
+    if (options & USE_TONE) {
+        /* find the tone in the last character. */
+        char chr = input[parsed_len - 1];
+        if ( '0' < chr && chr <= '5' ) {
+            tone = chr - '0';
+            parsed_len --;
+            tone_pos = parsed_len;
+        }
+
+        /* check the force tone option. */
+        if (options & FORCE_TONE && CHEWING_ZERO_TONE == tone) {
+            g_free(input);
+            return false;
+        }
+    }
+
+    /* parse pinyin core staff here. */
+
+    /* Note: optimize here? */
+    input[parsed_len] = '\0';
+    if (!search_pinyin_index2(options, m_pinyin_index, m_pinyin_index_len,
+                              input, key)) {
+        g_free(input);
+        return false;
+    }
+
+    if (options & USE_TONE) {
+        /* post processing tone. */
+        if ( parsed_len == tone_pos ) {
+            if (tone != CHEWING_ZERO_TONE) {
+                key.m_tone = tone;
+                parsed_len ++;
+            }
+        }
+    }
+
+    g_free(input);
+    return parsed_len == len;
+}
+
+int PinyinDirectParser2::parse(pinyin_option_t options,
+                               ChewingKeyVector & keys,
+                               ChewingKeyRestVector & key_rests,
+                               const char *str, int len) const {
+    g_array_set_size(keys, 0);
+    g_array_set_size(key_rests, 0);
+
+    ChewingKey key; ChewingKeyRest key_rest;
+
+    int parsed_len = 0;
+    int i = 0, cur = 0, next = 0;
+    while (cur < len) {
+        /* probe next position */
+        for (i = cur; i < len; ++i) {
+            if (' ' == str[i] || '\'' == str[i])
+                break;
+        }
+        next = i;
+
+        if (parse_one_key(options, key, str + cur, next - cur)) {
+            key_rest.m_raw_begin = cur; key_rest.m_raw_end = next;
+
+            /* save the pinyin. */
+            g_array_append_val(keys, key);
+            g_array_append_val(key_rests, key_rest);
+        } else {
+            return parsed_len;
+        }
+
+        /* skip consecutive spaces. */
+        for (i = next; i < len; ++i) {
+            if (' ' != str[i] && '\'' != str[i])
+                break;
+        }
+
+        cur = i;
+        parsed_len = i;
+    }
+
+    return parsed_len;
+}
diff --git a/src/storage/pinyin_parser2.h b/src/storage/pinyin_parser2.h
index a24d600..6faee17 100644
--- a/src/storage/pinyin_parser2.h
+++ b/src/storage/pinyin_parser2.h
@@ -229,6 +229,23 @@ public:
     bool set_scheme(DoublePinyinScheme scheme);
 };
 
+/* Direct Parser for Pinyin table load. */
+class PinyinDirectParser2 : public PhoneticParser2
+{
+    const pinyin_index_item_t * m_pinyin_index;
+    size_t m_pinyin_index_len;
+
+public:
+    PinyinDirectParser2();
+
+    virtual ~PinyinDirectParser2() {}
+
+    virtual bool parse_one_key(pinyin_option_t options, ChewingKey & key, const char *str, int len) const;
+
+    virtual int parse(pinyin_option_t options, ChewingKeyVector & keys, ChewingKeyRestVector & key_rests, const char *str, int len) const;
+};
+
+
 /**
  * ZhuyinParser2:
  *
@@ -365,7 +382,7 @@ public:
 };
 
 
-/* Direct Parser for Chewing table load. */
+/* Direct Parser for Zhuyin table load. */
 class ZhuyinDirectParser2 : public PhoneticParser2
 {
     const chewing_index_item_t * m_chewing_index;
-- 
cgit