/* Parse and evaluate addition and subtraction expressions */
struct val *
eval3(void)
{
struct val *l, *r;
enum token op;
l = eval4();
while ((op = token) == ADD || op == SUB) {
nexttoken(0);
r = eval4();
if (!to_integer(l) || !to_integer(r)) {
errx(2, "non-numeric argument");
}
if (op == ADD) {
l->u.i += r->u.i;
} else {
l->u.i -= r->u.i;
}
free_value(r);
}
return l;
}
static VALUE *eval3(void)
{
VALUE *l, *r;
int op;
arith_t val;
l = eval4();
while (1) {
op = nextarg("+");
if (!op) {
op = nextarg("-");
if (!op) return l;
}
G.args++;
r = eval4();
val = arithmetic_common(l, r, op);
freev(l);
freev(r);
l = int_value(val);
}
}
static inline_macro int
drizzle_polynomial(void* state,
const double xd, const double yd,
const integer_t n,
const double* xin /*[n]*/, const double* yin /*[n]*/,
/* Output parameters */
double* xout, double* yout,
struct driz_error_t* error) {
struct mapping_param_t* m = (struct mapping_param_t*)state;
double xdoff, ydoff;
integer_t i;
bool_t new_reference;
/* Check for the presence of "refpix" additional information in the
coefficients. If it is, set a flag and offset again */
if (m->coeff_type > COEFF_OFFSET / 2) {
new_reference = TRUE;
m->coeff_type -= COEFF_OFFSET;
xdoff = m->xcen - m->x_coeffs[m->num_coeffs - 1] + 1.0;
ydoff = m->ycen - m->y_coeffs[m->num_coeffs - 1] + 1.0;
m->num_coeffs--;
} else {
new_reference = FALSE;
xdoff = 2.0;
ydoff = 2.0;
}
if (m->coeff_type == 3) {
for (i = 0; i < n; ++i) {
xout[i] = eval3(xin[i] + xdoff, yin[i] + ydoff, m->x_coeffs) - xdoff;
yout[i] = eval3(xin[i] + xdoff, yin[i] + ydoff, m->y_coeffs) - ydoff;
}
} else if (m->coeff_type == 4) {
for (i = 0; i < n; ++i) {
xout[i] = eval4(xin[i] + xdoff, yin[i] + ydoff, m->x_coeffs) - xdoff;
yout[i] = eval4(xin[i] + xdoff, yin[i] + ydoff, m->y_coeffs) - ydoff;
}
} else if (m->coeff_type == 5) {
for (i = 0; i < n; ++i) {
xout[i] = eval5(xin[i] + xdoff, yin[i] + ydoff, m->x_coeffs) - xdoff;
yout[i] = eval5(xin[i] + xdoff, yin[i] + ydoff, m->y_coeffs) - ydoff;
}
} else if (m->coeff_type >= 6 || m->coeff_type == 1 || m->coeff_type == 2) {
for (i = 0; i < n; ++i) {
if (evaln(xin[i] + xdoff, yin[i] + ydoff, m->x_coeffs, m->coeff_type, &xout[i], error) ||
evaln(xin[i] + xdoff, yin[i] + ydoff, m->y_coeffs, m->coeff_type, &yout[i], error))
return 1;
xout[i] -= xdoff;
yout[i] -= ydoff;
}
} else if (m->coeff_type == -3) {
for (i = 0; i < n; ++i) {
rad3(xin[i] + xdoff, yin[i] + ydoff, m->x_coeffs, &xout[i], &yout[i]);
xout[i] -= xdoff;
yout[i] -= ydoff;
}
} else {
driz_error_format_message(error, "Invalid coefficient type %d", m->coeff_type);
return 1;
}
if (new_reference) {
m->coeff_type += COEFF_OFFSET;
m->num_coeffs++;
}
return 0;
}
