ICU-64260.0.1.tar.gz

[apple/icu.git] / icuSources / i18n / gregoimp.h

diff --git a/icuSources/i18n/gregoimp.h b/icuSources/i18n/gregoimp.h
index d8ab8de48b0b6609c900a94ae888e7da564e72f6..06eb32384511e48924b0b41acd00aeacd1ef213b 100644 (file)
--- a/icuSources/i18n/gregoimp.h
+++ b/icuSources/i18n/gregoimp.h
@@ -1,6 +1,8 @@
+// © 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
 /*
  **********************************************************************
- * Copyright (c) 2003-2007, International Business Machines
+ * Copyright (c) 2003-2008, International Business Machines
  * Corporation and others.  All Rights Reserved.
  **********************************************************************
  * Author: Alan Liu
@@ -22,9 +24,10 @@ U_NAMESPACE_BEGIN
 
 /**
  * A utility class providing mathematical functions used by time zone
- * and calendar code.  Do not instantiate.
+ * and calendar code.  Do not instantiate.  Formerly just named 'Math'.
+ * @internal
  */
-class Math {
+class ClockMath {
  public:
     /**
      * Divide two integers, returning the floor of the quotient.
@@ -37,6 +40,17 @@ class Math {
      */
     static int32_t floorDivide(int32_t numerator, int32_t denominator);
 
+    /**
+     * Divide two integers, returning the floor of the quotient.
+     * Unlike the built-in division, this is mathematically
+     * well-behaved.  E.g., <code>-1/4</code> => 0 but
+     * <code>floorDivide(-1,4)</code> => -1.
+     * @param numerator the numerator
+     * @param denominator a divisor which must be != 0
+     * @return the floor of the quotient
+     */
+    static int64_t floorDivide(int64_t numerator, int64_t denominator);
+
     /**
      * Divide two numbers, returning the floor of the quotient.
      * Unlike the built-in division, this is mathematically
@@ -250,7 +264,7 @@ class Grego {
     static const int8_t MONTH_LENGTH[24];
 };
 
-inline double Math::floorDivide(double numerator, double denominator) {
+inline double ClockMath::floorDivide(double numerator, double denominator) {
     return uprv_floor(numerator / denominator);
 }
 
@@ -281,80 +295,15 @@ inline double Grego::julianDayToMillis(int32_t julian)
 }
 
 inline int32_t Grego::millisToJulianDay(double millis) {
-  return (int32_t) (kEpochStartAsJulianDay + Math::floorDivide(millis, (double)kOneDay));
+  return (int32_t) (kEpochStartAsJulianDay + ClockMath::floorDivide(millis, (double)kOneDay));
 }
 
 inline int32_t Grego::gregorianShift(int32_t eyear) {
-  int32_t y = eyear-1;
-  int32_t gregShift = Math::floorDivide(y, 400) - Math::floorDivide(y, 100) + 2;
+  int64_t y = (int64_t)eyear-1;
+  int32_t gregShift = static_cast<int32_t>(ClockMath::floorDivide(y, (int64_t)400) - ClockMath::floorDivide(y, (int64_t)100) + 2);
   return gregShift;
 }
 
-/**
- * This utility class provides convenient access to the data needed for a calendar. 
- * @internal ICU 3.0
- */
-class CalendarData : public UMemory {
-public: 
-    /**
-     * Construct a CalendarData from the given locale.
-     * @param loc locale to use. The 'calendar' keyword will be ignored.
-     * @param type calendar type. NULL indicates the gregorian calendar. 
-     * No default lookup is done.
-     * @param status error code
-     */
-    CalendarData(const Locale& loc, const char *type, UErrorCode& status);
-
-    /**
-     * Load data for calendar. Note, this object owns the resources, do NOT call ures_close()!
-     * The ResourceBundle C++ API should NOT be used because it is too slow for a low level API.
-     *
-     * @param key Resource key to data
-     * @param status Error Status
-     * @internal
-     */
-    UResourceBundle* getByKey(const char *key, UErrorCode& status);
-
-    /**
-     * Load data for calendar. Note, this object owns the resources, do NOT call ures_close()!
-     * There is an implicit key of 'format'
-     * data is located in:   "calendar/key/format/subKey"
-     * for example,  calendar/dayNames/format/abbreviated
-     * The ResourceBundle C++ API should NOT be used because it is too slow for a low level API.
-     *
-     * @param key Resource key to data
-     * @param subKey Resource key to data
-     * @param status Error Status
-     * @internal
-     */
-    UResourceBundle* getByKey2(const char *key, const char *subKey, UErrorCode& status);
-
-    /**
-     * Load data for calendar. Note, this object owns the resources, do NOT call ures_close()!
-     * data is located in:   "calendar/key/contextKey/subKey"
-     * for example,  calendar/dayNames/standalone/narrow
-     * The ResourceBundle C++ API should NOT be used because it is too slow for a low level API.
-     *
-     * @param key Resource key to data
-     * @param contextKey Resource key to data
-     * @param subKey Resource key to data
-     * @param status Error Status
-     * @internal
-     */
-    UResourceBundle* getByKey3(const char *key, const char *contextKey, const char *subKey, UErrorCode& status);
-
-    ~CalendarData();
-
-private:
-    void initData(const char *locale, const char *type, UErrorCode& status);
-
-    UResourceBundle *fFillin;
-    UResourceBundle *fOtherFillin;
-    UResourceBundle *fBundle;
-    UResourceBundle *fFallback;
-    CalendarData(); // Not implemented.
-};
-
 U_NAMESPACE_END
 
 #endif // !UCONFIG_NO_FORMATTING