icuSources/common/uhash_us.cpp

   1 /*
   2 ******************************************************************************
   3 *   Copyright (C) 1997-2001, International Business Machines
   4 *   Corporation and others.  All Rights Reserved.
   5 ******************************************************************************
   6 *   Date        Name        Description
   7 *   03/22/00    aliu        Creation.
   8 *   07/06/01    aliu        Modified to support int32_t keys on
   9 *                           platforms with sizeof(void*) < 32.
  10 ******************************************************************************
  11 */
  12
  13 #include "uhash.h"
  14 #include "hash.h"
  15 #include "uvector.h"
  16 #include "unicode/unistr.h"
  17 #include "unicode/uchar.h"
  18
  19 /********************************************************************
  20  * PUBLIC UnicodeString support functions for UHashtable
  21  ********************************************************************/
  22
  23 U_CAPI int32_t U_EXPORT2
  24 uhash_hashUnicodeString(const UHashTok key) {
  25     U_NAMESPACE_USE
  26     const UnicodeString *str = (const UnicodeString*) key.pointer;
  27     return (str == NULL) ? 0 : str->hashCode();
  28 }
  29
  30 U_CAPI int32_t U_EXPORT2
  31 uhash_hashCaselessUnicodeString(const UHashTok key) {
  32     U_NAMESPACE_USE
  33     const UnicodeString *str = (const UnicodeString*) key.pointer;
  34     if (str == NULL) {
  35         return 0;
  36     }
  37     // Inefficient; a better way would be to have a hash function in
  38     // UnicodeString that does case folding on the fly.
  39     UnicodeString copy(*str);
  40     return copy.foldCase().hashCode();
  41 }
  42
  43 U_CAPI void U_EXPORT2
  44 uhash_deleteUnicodeString(void *obj) {
  45     U_NAMESPACE_USE
  46     delete (UnicodeString*) obj;
  47 }
  48
  49 U_CAPI UBool U_EXPORT2
  50 uhash_compareUnicodeString(const UHashTok key1, const UHashTok key2) {
  51     U_NAMESPACE_USE
  52     const UnicodeString *str1 = (const UnicodeString*) key1.pointer;
  53     const UnicodeString *str2 = (const UnicodeString*) key2.pointer;
  54     if (str1 == str2) {
  55         return TRUE;
  56     }
  57     if (str1 == NULL || str2 == NULL) {
  58         return FALSE;
  59     }
  60     return *str1 == *str2;
  61 }
  62
  63 U_CAPI UBool U_EXPORT2
  64 uhash_compareCaselessUnicodeString(const UHashTok key1, const UHashTok key2) {
  65     U_NAMESPACE_USE
  66     const UnicodeString *str1 = (const UnicodeString*) key1.pointer;
  67     const UnicodeString *str2 = (const UnicodeString*) key2.pointer;
  68     if (str1 == str2) {
  69         return TRUE;
  70     }
  71     if (str1 == NULL || str2 == NULL) {
  72         return FALSE;
  73     }
  74     return str1->caseCompare(*str2, U_FOLD_CASE_DEFAULT) == 0;
  75 }
  76
  77 /**
  78  * Deleter for Hashtable objects.
  79  */
  80 U_CAPI void U_EXPORT2
  81 uhash_deleteHashtable(void *obj) {
  82     U_NAMESPACE_USE
  83     delete (Hashtable*) obj;
  84 }
  85
  86 /**
  87  * Deleter for UVector objects.
  88  */
  89 U_CAPI void U_EXPORT2
  90 uhash_deleteUVector(void *obj) {
  91     U_NAMESPACE_USE
  92     delete (UVector*) obj;
  93 }
  94
  95 //eof