Thread: char** in struct amd malloc()

Hi, I am trying to pass data to a .DLL I want to use. DLL accepts this structure for its data.

Code:

PTR 01FB317C    -> 01EEB208 -> ASCII "DATA0"
                   018947A0 ->          01F72f30 -> ASCII "DATA1"
                                 +8     01F74558 -> ASCII "DATA2"
                                 +12    01F742E8 -> ASCII "DATA3"
           			 +16    01F73FF8 -> ASCII "DATA4"
                                 +20    01FD3CF8 -> ASCII "DATA5"
          		         +24    01FD4EC8 -> ASCII "DATA6"
            			 +28    01F724D8 -> ASCII "DATA7"
                 		 +32             -> ASCII "DATA8"
            			 +36             -> ASCII "DATA9"
            			 +40             -> ASCII "DATA10"
	    			 +44             -> ASCII "DATA11"
            			 +48             -> ASCII "DATA12"

Pointers are from a call from real application.ASCII strings are of size 256.


So i created this structure:

Code:

typedef struct
	{
	     char *s1;
             char ** ss1;
	} Rec1;

Now I am trying to malloc before I put data on it

Code:

      Rec1 *a;
	
        a = (Rec1 *)malloc(sizeof(Rec1));
	
	a->s1 = (char*)malloc(16*sizeof(char));
	
	strcpy(a->s1, "DATA0"); <--- This works OK as seen on debugger
	
	a->ss1 = (char**) malloc(48);  <--- !CRASH!!! ; Trying to allocate space for pointers
	
	for( i=0; i < 12; i++)
	a->ss1[i] = (char *)malloc(256);
	
	
	strcpy(a->ss1[0], "DATA1");

        .......


        free(a);
	for( i=0; i < 12; i++)
             free( a->ss1[i] );
	free( a->ss1 );

Problem is the above malloc() crashes with C0000005

Can you help me how is the correct way to do it?


PS: On 1st declaration of structure it is char *........1; I keep editing the message and it keeps ignoring my edit always showing ......1; !!!! @#!
PS2: I managed to do it