Hi,
stdint.h is a standard C header file. If you use it in VC, you need to
download it from net and place it in the include folder.
If packing of struct is necessory, use "#pragma pack" compiler directive to
resolve it. For example,
#include <stdint.h>
#pragma pack(1)
union U8x4_n_U32
{
uint8_t u8[4];
uint32_t u32;
};
#pragma pack()
SDCC will ignore the pragmas with an warning. GCC and VC would accept it
without any problem.
I have to think about the endian-ness problem. Most probably I would write
some #ifdef kind of statement to compile the specific part of the code that
converts a long to its constituent bytes.
Krish
On Thu, May 5, 2011 at 3:13 PM, Maarten Brock <sourceforge.br...@dse.nl>wrote:
> Hi all,
>
> When portability is an issue my concerns would be endianness and packing
> which none of the posts have addressed. C does not guarantee much about
> the position of fields in a union or a struct or the position of bytes in
> a long int.
>
> Maarten
>
> > Am 05.05.2011 09:10, schrieb Krishnendu Chatterjee:
> >> Hi,
> >>
> >> My solution would be:
> >>
> >> #include <stdint.h>
> >>
> >> union […]
> >
> > This seems to be the best so far, but none of the presented "solutions"
> > from this thread is portable or good C. Here's one that is:
> >
> > unsigned char c[sizeof(unsigned long)];
> > unsigned long i;
> >
> > memcpy(c, &i, sizeof(unsigned long));
> > memcpy(&i, c, sizeof(unsigned long));
> >
> > Philipp
> >
> >
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