Re: [RFC] convert a host address to a string

["Kai Tietz" <ktietz70@googlemail.com>]

2009/1/10 Mark Kettenis <mark.kettenis@xs4all.nl>:
>> Date: Sat, 10 Jan 2009 14:30:29 +0100
>> From: "Kai Tietz" <ktietz70@googlemail.com>
>>
>> ok, so I sugget the following patch instead. It is able to generate
>> addresses for XP64 without the use of any vendor specific printf
>> formatters, and uses for targets where sizeof(long) == sizeof(void*)
>> the long variant.
>
> +#if defined(PRINTF_HAS_LONG_LONG) && BITSIZEOF_SIZE_T == 64 && \
> +  SIZEOF_LONG == 4
> +  sprintf (str, "0x%llx", (unsigned long long) (uintptr_t) addr);
> +#elif BITSIZEOF_SIZE_T == 64 && SIZEOF_LONG == 4
> +  unsigned long long val = (unsigned long) (uintptr_t) addr;
> +  if ((val & ~0xffffffffull) != 0)
> +    sprintf (str, "0x%lx%08lx",
> +             (unsigned long) (val >> 32), (unsigned long) val);
> +  else
> +    sprintf (str, "0x%lx", (unsigned long) (uintptr_t) val);
> +#else
> +  sprintf (str, "0x%lx", (unsigned long) (uintptr_t) addr);
> +#endif
>   return str;
> +  BITSIZEOF_SIZE_T SIZEOF_LONG
>
> This is madness.  If you go this route please do a simple
>
> const char *
> host_address_to_string (const void *addr)
> {
>  return phex_nz ((uintptr_t)addr, sizeof(addr));
> }
>

hmm, well, but a "0x" has to be as prefix here, isn't it?

Kai
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