sizeof an array of structure without using 'sizeof' operator Post: 302302225

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allocrdsrec

ALLOCRDSREC(3)						      RDS PHYSICAL FUNCTIONS						    ALLOCRDSREC(3)

NAME

	allocrdsrec - allocates memory for a rectangle

ORIGIN

       This  software  belongs	to  the  ALLIANCE CAD SYSTEM developed by the ASIM team at LIP6 laboratory of Universite Pierre et Marie CURIE, in
       Paris, France.

       Web : http://asim.lip6.fr/recherche/alliance/
       E-mail : alliance-users@asim.lip6.fr

SYNOPSYS

       #include"rdsnnn.h"
       rdsrec_list *allocrdsrec( Size )
	 unsigned int Size;

PARAMETER

       Size		   Size of the added structure to the rdsrec_list structure.

DESCRIPTION

       Allocates a memory block for rdsrec_list structure and an added structure defined by the user. Fields contained in the two  structures  are
       set to NULL for pointers and 0L for numbers.

       NOTE: Allocation by heap ( see rdsalloc function ).

RETURN VALUE

       The pointer to the rectangle structure allocated.

ERRORS

       "Rds202: rdsalloc error, can't continue !"
	      it's impossible to allocate the memory size desired.

EXAMPLE

	       # include "mutnnn.h"
	       # include "rdsnnn.h"
	       # include "rtlnnn.h"
	   /* Name and fields of UserStruct are defined by the user */
	   typedef struct UserStruct
	    {
	      char *STRING;
	      void *USER1;
	    } UserStruct;
	  # define POINTER_STRING(R)				    
									 
	    (((UserStruct *)((char *)(R)+sizeof(rdsrec_list)))->STRING )
	  # define POINTER_USER1(R)				    
									 
	    (((UserStruct *)((char *)(R)+sizeof(rdsrec_list)))->USER1  )
	      main()
	       {
		 rdsfig_list *Figure;
		 rdsrec_list *Rectangle;
		      mbkenv();
		      rdsenv();
		      loadrdsparam();
		 Rectangle = allocrdsrec ( sizeof ( UserStruct ) );
		 Rectangle->X		    = 20;
		 Rectangle->Y		    = 20;
		 Rectangle->DX		    = 48;
		 Rectangle->DY		    = 8;
		 POINTER_STRING (Rectangle) = (char *) malloc (strlen ("Alu1")+1);
		 strcpy(POINTER_STRING(Rectangle),"Alu1");
		 POINTER_USER1	(Rectangle) = (void *) Figure;
		 ...
	       }

SEE ALSO

       librds, freerdsrec, rdsalloc, rdsfree

BUG REPORT

       This tool is under development at the ASIM department of the LIP6 laboratory.
       We need your feedback to improve documentation and tools.

ASIM
/LIP6							  October 1, 1997						    ALLOCRDSREC(3)

10 More Discussions You Might Find Interesting

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Discussion started by: ramneek

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How to get the sizeof char pointer

Discussion started by: SamRoj