ICU-531.48.tar.gz

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

diff --git a/icuSources/i18n/digitlst.h b/icuSources/i18n/digitlst.h
index c4e1d88e07bf753749ceebfb4bb376d9d24175b3..7e98d2b5e45716d08ce26de2cb7e0788333ebe9f 100644 (file)
--- a/icuSources/i18n/digitlst.h
+++ b/icuSources/i18n/digitlst.h
@@ -1,7 +1,7 @@
 /*
 ******************************************************************************
 *
-*   Copyright (C) 1997-2011, International Business Machines
+*   Copyright (C) 1997-2013, International Business Machines
 *   Corporation and others.  All Rights Reserved.
 *
 ******************************************************************************
@@ -66,6 +66,10 @@ template class U_I18N_API MaybeStackHeaderAndArray<decNumber, char, DEFAULT_DIGI
 #endif
 
 
+enum EStackMode { kOnStack };
+
+enum EFastpathBits { kFastpathOk = 1, kNoDecimal = 2 };
+
 /**
  * Digit List is actually a Decimal Floating Point number.
  * The original implementation has been replaced by a thin wrapper onto a 
@@ -247,12 +251,22 @@ public:
      */
     void set(int64_t source);
 
+    /**
+     * Utility routine to set the value of the digit list from an int64.
+     * Does not set the decnumber unless requested later
+     * If a non-zero maximumDigits is specified, no more than that number of
+     * significant digits will be produced.
+     * @param source The value to be set
+     */
+    void setInteger(int64_t source);
+
    /**
      * Utility routine to set the value of the digit list from a decimal number
      * string.
      * @param source The value to be set.  The string must be nul-terminated.
+     * @param fastpathBits special flags for fast parsing
      */
-    void set(const StringPiece &source, UErrorCode &status);
+    void set(const StringPiece &source, UErrorCode &status, uint32_t fastpathBits = 0);
 
     /**
      * Multiply    this = this * arg
@@ -383,12 +397,54 @@ private:
      * This is an optimization for the formatting implementation, which may
      * ask for the double value multiple times.
      */
-    double        fDouble;
-    UBool         fHaveDouble;
+    union DoubleOrInt64 {
+      double        fDouble;
+      int64_t       fInt64;
+    } fUnion;
+    enum EHave {
+      kNone=0,
+      kDouble,
+      kInt64
+    } fHave;
 
 
 
     UBool shouldRoundUp(int32_t maximumDigits) const;
+
+ public:
+
+#if U_OVERRIDE_CXX_ALLOCATION
+    using UMemory::operator new;
+    using UMemory::operator delete;
+#else
+    static inline void * U_EXPORT2 operator new(size_t size) U_NO_THROW { return ::operator new(size); };
+    static inline void U_EXPORT2 operator delete(void *ptr )  U_NO_THROW { ::operator delete(ptr); };
+#endif
+
+    /**
+     * Placement new for stack usage
+     * @internal
+     */
+    static inline void * U_EXPORT2 operator new(size_t /*size*/, void * onStack, EStackMode  /*mode*/) U_NO_THROW { return onStack; }
+
+    /**
+     * Placement delete for stack usage
+     * @internal
+     */
+    static inline void U_EXPORT2 operator delete(void * /*ptr*/, void * /*onStack*/, EStackMode /*mode*/)  U_NO_THROW {}
+
+ private:
+    inline void internalSetDouble(double d) {
+      fHave = kDouble;
+      fUnion.fDouble=d;
+    }
+    inline void internalSetInt64(int64_t d) {
+      fHave = kInt64;
+      fUnion.fInt64=d;
+    }
+    inline void internalClear() {
+      fHave = kNone;
+    }
 };