Just updated the program to take on board your helpful critique.
use strict;
use warnings;
my $point = pack 'f2', 1.2, 2.3;
func(undef); # pass in 'NULL pointer'
func($pointer);
Inline C => <<'C_END';
typedef struct { float x, y; } Point;
void func(SV *buf) {
if (!SvOK(buf)) {
printf("got a null pointer\n");
}
else if (SvPOK(buf) && SvCUR(BUF) == sizeof(Point)) {
Point *point = (Point *)SvPV_nolen(buf);
printf("x=%.2f, y=%.2f\n");
}
else {
croak("invalid scalar");
}
}
C_END
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