1 // © 2016 and later: Unicode, Inc. and others.
2 // License & terms of use: http://www.unicode.org/copyright.html
3 /*
4 **********************************************************************
5 *   Copyright (C) 2013, International Business Machines
6 *   Corporation and others.  All Rights Reserved.
7 **********************************************************************
8 *
9 * scriptset.h
10 *
11 * created on: 2013 Jan 7
12 * created by: Andy Heninger
13 */
14 
15 #ifndef __SCRIPTSET_H__
16 #define __SCRIPTSET_H__
17 
18 #include "unicode/utypes.h"
19 #include "unicode/uobject.h"
20 #include "unicode/uscript.h"
21 
22 #include "uelement.h"
23 
24 U_NAMESPACE_BEGIN
25 
26 //-------------------------------------------------------------------------------
27 //
28 //  ScriptSet - A bit set representing a set of scripts.
29 //
30 //              This class was originally used exclusively with script sets appearing
31 //              as part of the spoof check whole script confusable binary data. Its
32 //              use has since become more general, but the continued use to wrap
33 //              prebuilt binary data does constrain the design.
34 //
35 //-------------------------------------------------------------------------------
36 class U_I18N_API ScriptSet: public UMemory {
37   public:
38     static constexpr int32_t SCRIPT_LIMIT = 224;  // multiple of 32!
39 
40     ScriptSet();
41     ScriptSet(const ScriptSet &other);
42     ~ScriptSet();
43 
44     UBool operator == (const ScriptSet &other) const;
45     UBool operator != (const ScriptSet &other) const {return !(*this == other);}
46     ScriptSet & operator = (const ScriptSet &other);
47 
48     UBool      test(UScriptCode script, UErrorCode &status) const;
49     ScriptSet &Union(const ScriptSet &other);
50     ScriptSet &set(UScriptCode script, UErrorCode &status);
51     ScriptSet &reset(UScriptCode script, UErrorCode &status);
52     ScriptSet &intersect(const ScriptSet &other);
53     ScriptSet &intersect(UScriptCode script, UErrorCode &status);
54     UBool      intersects(const ScriptSet &other) const;  // Sets contain at least one script in common.
55     UBool      contains(const ScriptSet &other) const;    // All set bits in other are also set in this.
56 
57     ScriptSet &setAll();
58     ScriptSet &resetAll();
59     int32_t countMembers() const;
60     int32_t hashCode() const;
61     int32_t nextSetBit(int32_t script) const;
62 
63     UBool isEmpty() const;
64 
65     UnicodeString &displayScripts(UnicodeString &dest) const; // append script names to dest string.
66     ScriptSet & parseScripts(const UnicodeString &scriptsString, UErrorCode &status);  // Replaces ScriptSet contents.
67 
68     // Wraps around UScript::getScriptExtensions() and adds the corresponding scripts to this instance.
69     void setScriptExtensions(UChar32 codePoint, UErrorCode& status);
70 
71   private:
72     uint32_t  bits[SCRIPT_LIMIT / 32];
73 };
74 
75 U_NAMESPACE_END
76 
77 U_CAPI UBool U_EXPORT2
78 uhash_compareScriptSet(const UElement key1, const UElement key2);
79 
80 U_CAPI int32_t U_EXPORT2
81 uhash_hashScriptSet(const UElement key);
82 
83 U_CAPI void U_EXPORT2
84 uhash_deleteScriptSet(void *obj);
85 
86 #endif // __SCRIPTSET_H__
87