Re^2: Using small memory model functions on huge arrays (was See below...)

[Mike Percy]

darcy at druid.uucp (D'Arcy J.M. Cain) writes:
[stuff about mixed mode strcpy]

>#define mixstrcpy(d, s)  { int k = 0; do d[k] = s[k]; while (s[k++]);}

>At that point it is probably just as easy to put it inline any way.  I
>tested the above on Unix but it should work on brain dead OS's as well.
 
With one, possibly trivial, problem.  As I have pointed out here before,
unless d and s are both huge pointers, the [] operators will fail when
used to address items whose byte offset from &array[0] is greater than
64K (we are talking about Intel here, after all).  This might need to
be

#define mixstrcpy(d, s) \
 { \
    while(*(char huge *)d++ = *(char huge *)s++); \
 }
 
We have to use huge; far isn't sufficient, as it wraps around in its segment.
But again, unles you know you have really mongo large structures, avoid
using huge and incurring its overhead.