initial commit, 4.5 stable

thirdparty/icu4c/common/hash.h

@@ -0,0 +1,267 @@
+// © 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+******************************************************************************
+*   Copyright (C) 1997-2014, International Business Machines
+*   Corporation and others.  All Rights Reserved.
+******************************************************************************
+*   Date        Name        Description
+*   03/28/00    aliu        Creation.
+******************************************************************************
+*/
+
+#ifndef HASH_H
+#define HASH_H
+
+#include "unicode/unistr.h"
+#include "unicode/uobject.h"
+#include "cmemory.h"
+#include "uhash.h"
+
+U_NAMESPACE_BEGIN
+
+/**
+ * Hashtable is a thin C++ wrapper around UHashtable, a general-purpose void*
+ * hashtable implemented in C.  Hashtable is designed to be idiomatic and
+ * easy-to-use in C++.
+ *
+ * Hashtable is an INTERNAL CLASS.
+ */
+class U_COMMON_API Hashtable : public UMemory {
+    UHashtable* hash;
+    UHashtable hashObj;
+
+    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
+     * @param ignoreKeyCase If true, keys are case insensitive.
+     * @param status Error code
+    */
+    inline 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
+    */
+    inline Hashtable(UBool ignoreKeyCase, int32_t size, UErrorCode& status);
+
+    /**
+     * Construct a hashtable
+     * @param keyComp Comparator for comparing the keys
+     * @param valueComp Comparator for comparing the values
+     * @param status Error code
+    */
+    inline Hashtable(UKeyComparator *keyComp, UValueComparator *valueComp, UErrorCode& status);
+
+    /**
+     * Construct a hashtable
+     * @param status Error code
+    */
+    inline Hashtable(UErrorCode& status);
+
+    /**
+     * Construct a hashtable, _disregarding any error_.  Use this constructor
+     * with caution.
+     */
+    inline Hashtable();
+
+    /**
+     * Non-virtual destructor; make this virtual if Hashtable is subclassed
+     * in the future.
+     */
+    inline ~Hashtable();
+
+    inline UObjectDeleter *setValueDeleter(UObjectDeleter *fn);
+
+    inline int32_t count() const;
+
+    inline void* put(const UnicodeString& key, void* value, UErrorCode& status);
+
+    inline int32_t puti(const UnicodeString& key, int32_t value, UErrorCode& status);
+
+    inline int32_t putiAllowZero(const UnicodeString& key, int32_t value, UErrorCode& status);
+
+    inline void* get(const UnicodeString& key) const;
+
+    inline int32_t geti(const UnicodeString& key) const;
+
+    inline int32_t getiAndFound(const UnicodeString& key, UBool &found) const;
+
+    inline void* remove(const UnicodeString& key);
+
+    inline int32_t removei(const UnicodeString& key);
+
+    inline void removeAll();
+
+    inline UBool containsKey(const UnicodeString& key) const;
+
+    inline const UHashElement* find(const UnicodeString& key) const;
+
+    /**
+     * @param pos - must be UHASH_FIRST on first call, and untouched afterwards.
+     * @see uhash_nextElement
+     */
+    inline const UHashElement* nextElement(int32_t& pos) const;
+
+    inline UKeyComparator* setKeyComparator(UKeyComparator*keyComp);
+
+    inline UValueComparator* setValueComparator(UValueComparator* valueComp);
+
+    inline UBool equals(const Hashtable& that) const;
+private:
+    Hashtable(const Hashtable &other) = delete; // forbid copying of this class
+    Hashtable &operator=(const Hashtable &other) = delete; // forbid copying of this class
+};
+
+/*********************************************************************
+ * Implementation
+ ********************************************************************/
+
+inline void Hashtable::init(UHashFunction *keyHash, UKeyComparator *keyComp,
+                            UValueComparator *valueComp, UErrorCode& status) {
+    if (U_FAILURE(status)) {
+        return;
+    }
+    uhash_init(&hashObj, keyHash, keyComp, valueComp, &status);
+    if (U_SUCCESS(status)) {
+        hash = &hashObj;
+        uhash_setKeyDeleter(hash, uprv_deleteUObject);
+    }
+}
+
+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(nullptr) {
+    init( uhash_hashUnicodeString, keyComp, valueComp, status);
+}
+
+inline Hashtable::Hashtable(UBool ignoreKeyCase, UErrorCode& status)
+ : hash(nullptr)
+{
+    init(ignoreKeyCase ? uhash_hashCaselessUnicodeString
+                        : uhash_hashUnicodeString,
+            ignoreKeyCase ? uhash_compareCaselessUnicodeString
+                        : uhash_compareUnicodeString,
+            nullptr,
+            status);
+}
+
+inline Hashtable::Hashtable(UBool ignoreKeyCase, int32_t size, UErrorCode& status)
+ : hash(nullptr)
+{
+    initSize(ignoreKeyCase ? uhash_hashCaselessUnicodeString
+                        : uhash_hashUnicodeString,
+            ignoreKeyCase ? uhash_compareCaselessUnicodeString
+                        : uhash_compareUnicodeString,
+            nullptr, size,
+            status);
+}
+
+inline Hashtable::Hashtable(UErrorCode& status)
+ : hash(nullptr)
+{
+    init(uhash_hashUnicodeString, uhash_compareUnicodeString, nullptr, status);
+}
+
+inline Hashtable::Hashtable()
+ : hash(nullptr)
+{
+    UErrorCode status = U_ZERO_ERROR;
+    init(uhash_hashUnicodeString, uhash_compareUnicodeString, nullptr, status);
+}
+
+inline Hashtable::~Hashtable() {
+    if (hash != nullptr) {
+        uhash_close(hash);
+    }
+}
+
+inline UObjectDeleter *Hashtable::setValueDeleter(UObjectDeleter *fn) {
+    return uhash_setValueDeleter(hash, fn);
+}
+
+inline int32_t Hashtable::count() const {
+    return uhash_count(hash);
+}
+
+inline void* Hashtable::put(const UnicodeString& key, void* value, UErrorCode& status) {
+    return uhash_put(hash, new UnicodeString(key), value, &status);
+}
+
+inline int32_t Hashtable::puti(const UnicodeString& key, int32_t value, UErrorCode& status) {
+    return uhash_puti(hash, new UnicodeString(key), value, &status);
+}
+
+inline int32_t Hashtable::putiAllowZero(const UnicodeString& key, int32_t value,
+                                        UErrorCode& status) {
+    return uhash_putiAllowZero(hash, new UnicodeString(key), value, &status);
+}
+
+inline void* Hashtable::get(const UnicodeString& key) const {
+    return uhash_get(hash, &key);
+}
+
+inline int32_t Hashtable::geti(const UnicodeString& key) const {
+    return uhash_geti(hash, &key);
+}
+
+inline int32_t Hashtable::getiAndFound(const UnicodeString& key, UBool &found) const {
+    return uhash_getiAndFound(hash, &key, &found);
+}
+
+inline void* Hashtable::remove(const UnicodeString& key) {
+    return uhash_remove(hash, &key);
+}
+
+inline int32_t Hashtable::removei(const UnicodeString& key) {
+    return uhash_removei(hash, &key);
+}
+
+inline UBool Hashtable::containsKey(const UnicodeString& key) const {
+    return uhash_containsKey(hash, &key);
+}
+
+inline const UHashElement* Hashtable::find(const UnicodeString& key) const {
+    return uhash_find(hash, &key);
+}
+
+inline const UHashElement* Hashtable::nextElement(int32_t& pos) const {
+    return uhash_nextElement(hash, &pos);
+}
+
+inline void Hashtable::removeAll() {
+    uhash_removeAll(hash);
+}
+
+inline UKeyComparator* Hashtable::setKeyComparator(UKeyComparator*keyComp){
+    return uhash_setKeyComparator(hash, keyComp);
+}
+
+inline UValueComparator* Hashtable::setValueComparator(UValueComparator* valueComp){
+    return uhash_setValueComparator(hash, valueComp);
+}
+
+inline UBool Hashtable::equals(const Hashtable& that)const{
+   return uhash_equals(hash, that.hash);
+}
+U_NAMESPACE_END
+
+#endif
+