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comparison: intl/icu/source/i18n/ztrans.h

intl/icu/source/i18n/ztrans.h

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1 /*
2 *******************************************************************************
3 * Copyright (C) 2009-2011, International Business Machines Corporation and
4 * others. All Rights Reserved.
5 *******************************************************************************
6 */
7 #ifndef __ZTRANS_H
8 #define __ZTRANS_H
9
10 /**
11 * \file
12 * \brief C API: Time zone transition classes
13 */
14
15 #include "unicode/utypes.h"
16
17 #if !UCONFIG_NO_FORMATTING
18
19 #ifndef UCNV_H
20
21 /**
22 * A TimeZoneTransition. Use the ztrans_* API to manipulate. Create with
23 * ztrans_open*, and destroy with ztrans_close.
24 */
25 struct ZTrans;
26 typedef struct ZTrans ZTrans;
27
28 #endif
29
30 /**
31 * Constructs a time zone transition with the time and the rules before/after
32 * the transition.
33 *
34 * @param time The time of transition in milliseconds since the base time.
35 * @param from The time zone rule used before the transition.
36 * @param to The time zone rule used after the transition.
37 */
38 U_CAPI ZTrans* U_EXPORT2
39 ztrans_open(UDate time, const void* from, const void* to);
40
41 /**
42 * Constructs an empty <code>TimeZoneTransition</code>
43 */
44 U_CAPI ZTrans* U_EXPORT2
45 ztrans_openEmpty();
46
47 /**
48 * Disposes of the storage used by a ZTrans object. This function should
49 * be called exactly once for objects returned by ztrans_open*.
50 * @param trans the object to dispose of
51 */
52 U_CAPI void U_EXPORT2
53 ztrans_close(ZTrans *trans);
54
55 /**
56 * Returns a copy of this object.
57 * @param rule the original ZRule
58 * @return the newly allocated copy of the ZRule
59 */
60 U_CAPI ZTrans* U_EXPORT2
61 ztrans_clone(ZTrans *trans);
62
63 /**
64 * Returns true if trans1 is identical to trans2
65 * and vis versa.
66 * @param trans1 to be checked for containment
67 * @param trans2 to be checked for containment
68 * @return true if the test condition is met
69 */
70 U_CAPI UBool U_EXPORT2
71 ztrans_equals(const ZTrans* trans1, const ZTrans* trans2);
72
73 /**
74 * Returns the time of transition in milliseconds.
75 * param trans, the transition to use
76 * @return The time of the transition in milliseconds since the 1970 Jan 1 epoch time.
77 */
78 U_CAPI UDate U_EXPORT2
79 ztrans_getTime(ZTrans* trans);
80
81 /**
82 * Sets the time of transition in milliseconds.
83 * param trans, the transition to use
84 * @param time The time of the transition in milliseconds since the 1970 Jan 1 epoch time.
85 */
86 U_CAPI void U_EXPORT2
87 ztrans_setTime(ZTrans* trans, UDate time);
88
89 /**
90 * Returns the rule used before the transition.
91 * param trans, the transition to use
92 * @return The time zone rule used after the transition.
93 */
94 U_CAPI void* U_EXPORT2
95 ztrans_getFrom(ZTrans* & trans);
96
97 /**
98 * Sets the rule used before the transition. The caller remains
99 * responsible for deleting the TimeZoneRule object.
100 * param trans, the transition to use
101 * param trans, the transition to use
102 * @param from The time zone rule used before the transition.
103 */
104 U_CAPI void U_EXPORT2
105 ztrans_setFrom(ZTrans* trans, const void* from);
106
107 /**
108 * Adopts the rule used before the transition. The caller must
109 * not delete the TimeZoneRule object passed in.
110 * param trans, the transition to use
111 * @param from The time zone rule used before the transition.
112 */
113 U_CAPI void U_EXPORT2
114 ztrans_adoptFrom(ZTrans* trans, void* from);
115
116 /**
117 * Returns the rule used after the transition.
118 * param trans, the transition to use
119 * @return The time zone rule used after the transition.
120 */
121 U_CAPI void* U_EXPORT2
122 ztrans_getTo(ZTrans* trans);
123
124 /**
125 * Sets the rule used after the transition. The caller remains
126 * responsible for deleting the TimeZoneRule object.
127 * param trans, the transition to use
128 * @param to The time zone rule used after the transition.
129 */
130 U_CAPI void U_EXPORT2
131 ztrans_setTo(ZTrans* trans, const void* to);
132
133 /**
134 * Adopts the rule used after the transition. The caller must
135 * not delete the TimeZoneRule object passed in.
136 * param trans, the transition to use
137 * @param to The time zone rule used after the transition.
138 */
139 U_CAPI void U_EXPORT2
140 ztrans_adoptTo(ZTrans* trans, void* to);
141
142 /**
143 * Return the class ID for this class. This is useful only for comparing to
144 * a return value from getDynamicClassID(). For example:
145 * <pre>
146 * . Base* polymorphic_pointer = createPolymorphicObject();
147 * . if (polymorphic_pointer->getDynamicClassID() ==
148 * . erived::getStaticClassID()) ...
149 * </pre>
150 * param trans, the transition to use
151 * @return The class ID for all objects of this class.
152 */
153 U_CAPI UClassID U_EXPORT2
154 ztrans_getStaticClassID(ZTrans* trans);
155
156 /**
157 * Returns a unique class ID POLYMORPHICALLY. Pure virtual override. This
158 * method is to implement a simple version of RTTI, since not all C++
159 * compilers support genuine RTTI. Polymorphic operator==() and clone()
160 * methods call this method.
161 *
162 * param trans, the transition to use
163 * @return The class ID for this object. All objects of a
164 * given class have the same class ID. Objects of
165 * other classes have different class IDs.
166 */
167 U_CAPI UClassID U_EXPORT2
168 ztrans_getDynamicClassID(ZTrans* trans);
169
170 #endif
171
172 #endif

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