ASML C Coding Standard

Rule: 6.3.2.2.a

Synopsis:	Pointer to and from integer conversions shall not be used. For instance on 64-bit x86 processors the size of an integer is 32-bits while the pointer is 64-bits. Therefore converting a pointer to an integer will discard part of the address.
Language:	C
Severity Level:	4
Category:	Conversions

Description:

Justification

Since such conversions involve implementation defined and undefined behavior, it is safer to avoid their use.

Example 1

int   i;
int  *ip;

i = (int)ip; /* WRONG */
ip = (int *)i; /* WRONG */

Example 2

static void ccbb_f(void *p_base)
{
   unsigned int offset = 0x10;
   char *p_address = (char*)((unsigned int)p_base + offset); /* WRONG */
}

static void ccbb_f(void *p_base)
{
   unsigned int offset = 0x10;
   char *p_address = (char*)p_base + offset; /* RIGHT */
}