General gcc4.0 porting guide

[Ignacio Vazquez-Abrams]

On Fri, 2005-04-29 at 15:32 +0200, Matthias Saou wrote: 
> Hmmm, so I guess the patch I've made for libmpeg3 is wrong. What would the
> proper fix for this be, then?
> 
>       *((unsigned short*)data)++ = \
>                ((CLIP(r_l) & 0xf8) << 8) | \
>                ((CLIP(g_l) & 0xfc) << 3) | \
>                ((CLIP(b_l) & 0xf8) >> 3);

Possibly:

      *((unsigned short*)data) = \
               ((CLIP(r_l) & 0xf8) << 8) | \
               ((CLIP(g_l) & 0xfc) << 3) | \
               ((CLIP(b_l) & 0xf8) >> 3);
      data += sizeof(unsigned short) / sizeof(*data);

or:

      register unsigned short newdata = \
               ((CLIP(r_l) & 0xf8) << 8) | \
               ((CLIP(g_l) & 0xfc) << 3) | \
               ((CLIP(b_l) & 0xf8) >> 3);
      data++ = (unsigned char)((newdata >> 8) & 0xff);
      data++ = (unsigned char)(newdata & 0xff);

-- 
Ignacio Vazquez-Abrams <ivazquez at ivazquez.net>
http://fedora.ivazquez.net/

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