Question

SystemVerilog:

typedef struct { ... } MyType;
import "DPI" function void foo(input MyType i [], output MyType o []);
MyType source [11:20];
MyType target [11:20];
foo(source, target);

C:

#include "svdpi.h"
typedef struct ... } MyType;
void foo(const svOpenArrayHandle hin, const svOpenArrayHandle hout)
{
int count = svLength(hin, 1);
MyType *s = (MyType *)svGetArrayPtr(hin);
MyType *d = (MyType *)svGetArrayPtr(hout);
if (s && d) { /* both arrays have C layout */
/* an efficient solution using pointer arithmetic */
while (count--)
*d++ = *s++;
/* even more efficient:
memcpy(d, s, svSizeOfArray(hin));
*/
} else { /* less efficient yet implementation independent */
int i = svLow(hin, 1);
int j = svLow(hout, 1);
while (i <= svHigh(hin, 1)) {
*(MyType *)svGetArrElemPtr1(hout, j++) =
*(MyType *)svGetArrElemPtr1(hin, i++);
}
}
}