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X-Hacker.org- Force 4.0 Reference - datetoptr() poke a date value into a memory address http://www.X-Hacker.org [<<Previous Entry] [^^Up^^] [Next Entry>>] [Menu] [About The Guide]
 datetoptr()         Poke a date value into a memory address
------------------------------------------------------------------------------
 Declaration
   memory.hdr

 Syntax
   proc datetoptr extern
   param value date     dValue, ;
         value _POINTER pMem

 Arguments
   dValue is the value to place in memory.
   pMem is the target address.

 Return
   None.

 Description
   This procedure copies a date value into the specified memory location.

   The procedure is included for compatibility with earlier Force versions.
   Use the ptr() data type in conjunction with the & and * operators for
   directly writing to explicit memory addresses.

 Example
   #define EXAMPLE_MEMORY
   #include example.hdr

   proc Test_datetoptr
   vardef
      ptr( date ) pMem        // pointer
   enddef
   pMem := malloc( 1000 )     // allocate working space
   ? *pMem                    // prints accidental value
   datetoptr( today(), pMem ) // write a date to memory via function call
   ? *pMem                    // prints today's date
   *pMem := daysfrom( today(), 1 ) // write a date to memory via pointer
   ? *pMem                    // prints tomorrow's date
   free( pMem )               // free allocation
   endproc

   proc main
   Test_datetoptr()
   endproc

See Also: datetosegoff()

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