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