[Info-vax] DEC C 64/32 bit pointer conversion question

[John E. Malmberg]

I have a case where a system service only has accepts a 32 bit pointer 
in an item list.

When I am compiling with 64 bit pointers available and the value can be 
referenced in a 32 bit pointer, I would like to just extract out the 
lower 32 bits.

However on the test program I get:

#if __INITIAL_POINTER_SIZE == 64
# pragma pointer_size save
# pragma pointer_size 32
#endif

#ifndef VMS_PTR32_TYPEDEF
#define VMS_PTR32_TYPEDEF

typedef char * char_ptr32;
typedef unsigned long * long_ptr32;
typedef void * void_ptr32;

#endif



str32 = (char_ptr32)((unsigned long int)str_64 & 0xFFFFFFFF);

str64 = 2060834088 or 0x000000007ad5d528
str32 = -2147483536 or 0x80000070

Which of course does not work.

What am I doing wrong?

Regards,
-John