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1 // © 2016 and later: Unicode, Inc. and others.
2 // License & terms of use: http://www.unicode.org/copyright.html
3 /*
4 ******************************************************************************
5 *
6 *   Copyright (C) 1999-2010, International Business Machines
7 *   Corporation and others.  All Rights Reserved.
8 *
9 ******************************************************************************/
10 
11 
12 /*----------------------------------------------------------------------------------
13  *
14  *  UDataMemory     A class-like struct that serves as a handle to a piece of memory
15  *                  that contains some ICU data (resource, converters, whatever.)
16  *
17  *                  When an application opens ICU data (with udata_open, for example,
18  *                  a UDataMemory * is returned.
19  *
20  *----------------------------------------------------------------------------------*/
21 #ifndef __UDATAMEM_H__
22 #define __UDATAMEM_H__
23 
24 #include "unicode/udata.h"
25 #include "ucmndata.h"
26 
27 struct UDataMemory {
28     const commonDataFuncs  *vFuncs;      /* Function Pointers for accessing TOC             */
29 
30     const DataHeader *pHeader;     /* Header of the memory being described by this    */
31                                    /*   UDataMemory object.                           */
32     const void       *toc;         /* For common memory, table of contents for        */
33                                    /*   the pieces within.                            */
34     UBool             heapAllocated;  /* True if this UDataMemory Object is on the    */
35                                    /*  heap and thus needs to be deleted when closed. */
36 
37     void             *mapAddr;     /* For mapped or allocated memory, the start addr. */
38                                    /* Only non-null if a close operation should unmap */
39                                    /*  the associated data.                           */
40     void             *map;         /* Handle, or other data, OS dependent.            */
41                                    /* Only non-null if a close operation should unmap */
42                                    /*  the associated data, and additional info       */
43                                    /*   beyond the mapAddr is needed to do that.      */
44     int32_t           length;      /* Length of the data in bytes; -1 if unknown.     */
45 };
46 
47 U_CFUNC UDataMemory *UDataMemory_createNewInstance(UErrorCode *pErr);
48 U_CFUNC void         UDatamemory_assign  (UDataMemory *dest, UDataMemory *source);
49 U_CFUNC void         UDataMemory_init    (UDataMemory *This);
50 U_CFUNC UBool        UDataMemory_isLoaded(const UDataMemory *This);
51 U_CFUNC void         UDataMemory_setData (UDataMemory *This, const void *dataAddr);
52 
53 U_CFUNC const DataHeader *UDataMemory_normalizeDataPointer(const void *p);
54 
55 U_CAPI int32_t U_EXPORT2
56 udata_getLength(const UDataMemory *pData);
57 
58 U_CAPI const void * U_EXPORT2
59 udata_getRawMemory(const UDataMemory *pData);
60 
61 #endif
62