Re: [lwip-users] Ok- Where Are They? #2

[davidm]

Frédéric BERNON wrote:
> Just, where do you find MAX_INT and LARGEST_INTEGER? I just grep the 
> code source but don't find them in the lwIP code...
>
> ----- Original Message ----- From: "Frédéric BERNON" 
> <address@hidden>
> To: "Mailing list for lwIP users" <address@hidden>
> Sent: Wednesday, April 16, 2008 1:16 AM
> Subject: Re: [lwip-users] Ok- Where Are They?
>
>
> > You're right, you have to define in your own cc.h file these defines, 
> > and some others like BYTE_ORDER, generic types like u8_t, s8_t, 
> > u16_t, etc... printf formaters, and pack instructions.
> >
> > If you need a sample, take to look to contrib/ports/win32.
> >
> >
> >
> > ----- Original Message ----- From: "davidm" <address@hidden>
> > To: "Mailing list for lwIP users" <address@hidden>
> > Sent: Wednesday, April 16, 2008 1:11 AM
> > Subject: [lwip-users] Ok- Where Are They?
> >
> >
> > > On doing a first time appraisal of lwip for its suitability in an 
> > > upcoming project I am stumbling to find the definitions/declarations 
> > > for MAX_INT and LARGEST_INTEGER.
> > >
> > > The target OS is a multi-tasking kernel under real mode DOS. The 
> > > tool chain is Open Watcom.
> > >
> > > If I read the documentation correctly, it is mainly cc.h, 
> > > sys_arch.h/c and perhaps a few others that influence the porting 
> > > procedure and therefore should the above missing bits be defined there?
> > >
> > > regards,
> > >
> > > davidm
> > >
> > > _______________________________________________
> > > lwip-users mailing list
> > > address@hidden
> > > http://lists.nongnu.org/mailman/listinfo/lwip-users
> >
> >
> >
> >
> > _______________________________________________
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This is a repeat response - the first one may have been bounced due to 
incorrect mail setting.

MAX_INT appears in api-msg.c, line 535, function netconn_alloc().

LARGEST_INTEGER in ..\ports\win32\sys_arch.c lines 46 and 57. I am using 
files from this port in my attempt to start the new port.

As an aside, my compiler is questioning line 947 from api-msg.c:-

if ((conn->write_msg->msg.w.len - conn->write_offset > 0xffff)) { /* 
max_u16_t */
  len = 0xffff;

with a warning that the comparison is always zero, which does beg the 
question how can a 16-bit variable/result ever exceed 0xffff?

Keep in mind this is the starting point for me and obviously I have to 
walk the learning curve. I am working with lwip-1.3.0.

regards,

davidm