Re: [lwip-devel] byte order, packing, optimizations

[Stéphane Lesage]

>Stephane,
>In the Wiki LWIP_PLATFORM_HTONS/L has 2 problems:
>1) Cases where HTONS is given  a value larger than 0xFFFF.  The >> 
needs an & 0xFF added to it.

well that should not happen, but...

>2) The x in the macro text must be (x).  x could be an expression 
whose precedence doesn't work out with the other operators in the macro.

you're right.

Ok I modified the wiki page
I added a cast to (u32_t) to secure the ((x)>>24) if the macro is given 
a signed number.

I also added the "use 32 bits add with carry" hint for writing the 
checksum routine in assembly.