ICU-62107.0.1.tar.gz

[apple/icu.git] / icuSources / common / hash.h

diff --git a/icuSources/common/hash.h b/icuSources/common/hash.h
index 9fedd0e521f9440e5d67dc1083dc621a42f1106e..c6be46720156d50eb6d8b5a71cc8ff4d9fa89275 100644 (file)
--- a/icuSources/common/hash.h
+++ b/icuSources/common/hash.h
@@ -1,6 +1,8 @@
+// © 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
 /*
 ******************************************************************************
-*   Copyright (C) 1997-2010, International Business Machines
+*   Copyright (C) 1997-2014, International Business Machines
 *   Corporation and others.  All Rights Reserved.
 ******************************************************************************
 *   Date        Name        Description
@@ -13,6 +15,7 @@
 
 #include "unicode/unistr.h"
 #include "unicode/uobject.h"
+#include "cmemory.h"
 #include "uhash.h"
 
 U_NAMESPACE_BEGIN
@@ -30,6 +33,8 @@ class U_COMMON_API Hashtable : public UMemory {
 
     inline void init(UHashFunction *keyHash, UKeyComparator *keyComp, UValueComparator *valueComp, UErrorCode& status);
 
+    inline void initSize(UHashFunction *keyHash, UKeyComparator *keyComp, UValueComparator *valueComp, int32_t size, UErrorCode& status);
+
 public:
     /**
      * Construct a hashtable
@@ -38,6 +43,14 @@ public:
     */
     Hashtable(UBool ignoreKeyCase, UErrorCode& status);
 
+    /**
+     * Construct a hashtable
+     * @param ignoreKeyCase If true, keys are case insensitive.
+     * @param size initial size allocation
+     * @param status Error code
+    */
+    Hashtable(UBool ignoreKeyCase, int32_t size, UErrorCode& status);
+
     /**
      * Construct a hashtable
      * @param keyComp Comparator for comparing the keys
@@ -73,9 +86,9 @@ public:
     int32_t puti(const UnicodeString& key, int32_t value, UErrorCode& status);
 
     void* get(const UnicodeString& key) const;
-    
+
     int32_t geti(const UnicodeString& key) const;
-    
+
     void* remove(const UnicodeString& key);
 
     int32_t removei(const UnicodeString& key);
@@ -84,10 +97,14 @@ public:
 
     const UHashElement* find(const UnicodeString& key) const;
 
+    /**
+     * @param pos - must be UHASH_FIRST on first call, and untouched afterwards.
+     * @see uhash_nextElement
+     */
     const UHashElement* nextElement(int32_t& pos) const;
-    
+
     UKeyComparator* setKeyComparator(UKeyComparator*keyComp);
-    
+
     UValueComparator* setValueComparator(UValueComparator* valueComp);
 
     UBool equals(const Hashtable& that) const;
@@ -100,7 +117,7 @@ private:
  * Implementation
  ********************************************************************/
 
-inline void Hashtable::init(UHashFunction *keyHash, UKeyComparator *keyComp, 
+inline void Hashtable::init(UHashFunction *keyHash, UKeyComparator *keyComp,
                             UValueComparator *valueComp, UErrorCode& status) {
     if (U_FAILURE(status)) {
         return;
@@ -108,14 +125,27 @@ inline void Hashtable::init(UHashFunction *keyHash, UKeyComparator *keyComp,
     uhash_init(&hashObj, keyHash, keyComp, valueComp, &status);
     if (U_SUCCESS(status)) {
         hash = &hashObj;
-        uhash_setKeyDeleter(hash, uhash_deleteUnicodeString);
+        uhash_setKeyDeleter(hash, uprv_deleteUObject);
     }
 }
 
-inline Hashtable::Hashtable(UKeyComparator *keyComp, UValueComparator *valueComp, 
+inline void Hashtable::initSize(UHashFunction *keyHash, UKeyComparator *keyComp,
+                                UValueComparator *valueComp, int32_t size, UErrorCode& status) {
+    if (U_FAILURE(status)) {
+        return;
+    }
+    uhash_initSize(&hashObj, keyHash, keyComp, valueComp, size, &status);
+    if (U_SUCCESS(status)) {
+        hash = &hashObj;
+        uhash_setKeyDeleter(hash, uprv_deleteUObject);
+    }
+}
+
+inline Hashtable::Hashtable(UKeyComparator *keyComp, UValueComparator *valueComp,
                  UErrorCode& status) : hash(0) {
     init( uhash_hashUnicodeString, keyComp, valueComp, status);
 }
+
 inline Hashtable::Hashtable(UBool ignoreKeyCase, UErrorCode& status)
  : hash(0)
 {
@@ -127,6 +157,17 @@ inline Hashtable::Hashtable(UBool ignoreKeyCase, UErrorCode& status)
             status);
 }
 
+inline Hashtable::Hashtable(UBool ignoreKeyCase, int32_t size, UErrorCode& status)
+ : hash(0)
+{
+    initSize(ignoreKeyCase ? uhash_hashCaselessUnicodeString
+                        : uhash_hashUnicodeString,
+            ignoreKeyCase ? uhash_compareCaselessUnicodeString
+                        : uhash_compareUnicodeString,
+            NULL, size,
+            status);
+}
+
 inline Hashtable::Hashtable(UErrorCode& status)
  : hash(0)
 {
@@ -193,7 +234,7 @@ inline void Hashtable::removeAll(void) {
 inline UKeyComparator* Hashtable::setKeyComparator(UKeyComparator*keyComp){
     return uhash_setKeyComparator(hash, keyComp);
 }
-    
+
 inline UValueComparator* Hashtable::setValueComparator(UValueComparator* valueComp){
     return uhash_setValueComparator(hash, valueComp);
 }