icuSources/common/udatamem.h

   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