int
main (int argc, char *argv[])
{
long px, py;
size_t intc;
long *intv;
if (argc != 4)
return usage ();
// the first to arguments are interpreted respectively as X and Y coordinates of the point of interest
px = require_number (argv[1]);
py = require_number (argv[2]);
// the third argument is interpreted as the filename
// from which we are reading
intv = read_numbers (argv[3], &intc);
if (intv == NULL)
{
(void)puts ("main: error parsing points file");
return EXIT_FAILURE;
}
if (intc % 2 != 0)
{
printf ("main: got %lu numbers, but expected an even number (pairs)\n", (unsigned long)intc);
xfree (intv);
return EXIT_FAILURE;
}
// call the algorithm that calculates wheter the point is inside the polyon
{
rc_ctx *ctx = rc_new (intc, intv);
printf ("%s\n", rc_contains (ctx, px, py) ? "inside" : "outside");
rc_delete (ctx);
}
xfree (intv);
return EXIT_SUCCESS;
}
static int
rcdel(const char *archive, char **members)
{ RcArchive rca = rc_open_archive(archive, RC_RDWR|RC_CREATE);
char *rcclass = "data";
size_t clen = strlen("--class=");
if ( !rca )
return badarchive(archive);
if ( members )
{ for( ; *members; members++ )
{ char *m = *members;
if ( strncmp(m, "--class=", clen) == 0 )
{ rcclass = m+clen;
continue;
}
if ( !rc_delete(rca, m, rcclass) )
error("Could not delete \"%s\": %s", m, rc_strerror(rc_errno));
else
verbose("d %s\n", m);
}
}
if ( rca->modified )
{ if ( !rc_save_archive(rca, NULL) )
{ error("Failed to create \"%s\": %s", archive, rc_strerror(rc_errno));
return 1;
}
}
rc_close_archive(rca);
return 0;
}
