Datetime增加hex()返回兼容oracle的Datetime格式存储

hikyuu_cpp/hikyuu/datetime/Datetime.cpp

@@ -115,7 +115,7 @@ std::string Datetime::repr() const {
                        minute(), second(), millisecond(), microsecond());
 }
 
-unsigned long long Datetime::number() const noexcept {
+uint64_t Datetime::number() const noexcept {
     try {
         HKU_IF_RETURN(m_data.date() == bd::date(bd::pos_infin), Null<unsigned long long>());
         return (unsigned long long)year() * 100000000LL + (unsigned long long)month() * 1000000LL +
@@ -129,6 +129,20 @@ unsigned long long Datetime::number() const noexcept {
     }
 }
 
+uint64_t Datetime::hex() const noexcept {
+    uint64_t ret = uint64_t(second());
+    ret |= (uint64_t(minute()) << 8);
+    ret |= (uint64_t(hour()) << 16);
+    ret |= (uint64_t(day()) << 24);
+    ret |= (uint64_t(month()) << 32);
+    uint64_t y = uint64_t(year());
+    uint64_t high_y = y / 100;
+    uint64_t low_y = y - high_y * 100;
+    ret |= (low_y << 40);
+    ret |= (high_y << 48);
+    return ret;
+}
+
 long Datetime::year() const {
     HKU_CHECK_THROW(!isNull(), std::logic_error, "This is Null Datetime!");
     return m_data.date().year();

hikyuu_cpp/hikyuu/datetime/Datetime.h

@@ -121,10 +121,17 @@ public:
     Datetime operator-(TimeDelta d) const;
 
     /**
-     * 返回如YYYYMMDDhhmm格式的数字，方便比较操作，
+     * 返回如YYYYMMDDhhmm格式的数字，方便比较操作
      * Null<Datetime>()对应的 number 为 Null<unsigned long long>
+     * @note 精度到分钟
      */
-    unsigned long long number() const noexcept;
+    uint64_t number() const noexcept;
+
+    /**
+     * 转化为 oracle datetime 方式的数字，后 7 个字节分别表示世纪、世纪中的年、月、日、时、分、秒
+     * @note 精度到秒
+     */
+    uint64_t hex() const noexcept;
 
     /**
      * 转化为字符串，供打印阅读，格式：

hikyuu_cpp/unit_test/hikyuu/datetime/test_Datetime.cpp

@@ -9,6 +9,7 @@
 
 #include <hikyuu/datetime/Datetime.h>
 #include <hikyuu/utilities/Null.h>
+#include <hikyuu/Log.h>
 
 using namespace hku;
 
@@ -121,6 +122,10 @@ TEST_CASE("test_Datetime") {
     Datetime m(y);
     CHECK(m == d);
 
+    /** @arg 兼容oracle datetime表示法 */
+    d = Datetime(2021, 4, 25, 23, 16, 27);
+    CHECK_EQ(d.hex(), 0x1415041917101bULL);
+
     /** @arg Null<Datetime>()转化为number */
     x = Null<unsigned long long>();
     d = Null<Datetime>();