static void standard(
dec64_string_state state
) {
int from = 0;
int to;
int places;
int sep = 0;
int64 exponent = dec64_exponent(state->number);
if (exponent >= 0) {
to = state->nr_digits + (int)exponent;
if (to + state->places > 20) {
scientific(state);
} else {
emit_digits_separated(state, 0, to);
if (state->places > 0) {
emit_decimal_point(state);
emit_digits(state, to, state->places + to);
}
}
} else {
from = (int)exponent + state->nr_digits;
to = state->nr_digits - state->nr_zeros;
if (from <= 0) {
places = to - from;
if (places > 18) {
scientific(state);
} else {
emit(state, '0');
emit_decimal_point(state);
if (places < state->places) {
to = state->places + from;
}
emit_digits(state, from, to);
}
} else {
emit_digits_separated(state, 0, from);
emit_decimal_point(state);
if (to - from < state->places) {
to = state->places + from;
}
emit_digits(state, from, to);
}
}
}
static void scientific(dec64_string_state state) {
int64 exponent = dec64_exponent(state->number) + state->nr_digits;
int nr_digits = (state->nr_digits - state->nr_zeros);
int at = 1;
emit_at(state, 0);
if (at < nr_digits) {
emit_decimal_point(state);
emit_digits(state, 1, nr_digits);
}
emit_exponent(state, exponent - 1);
}
static void engineering(dec64_string_state state) {
int64 exponent = dec64_exponent(state->number) + state->nr_digits;
int to = state->nr_digits - state->nr_zeros;
int fudge = (int)exponent % 3;
if (fudge <= 0) {
fudge += 3;
}
emit_digits(state, 0, fudge);
if (fudge < to) {
emit_decimal_point(state);
emit_digits(state, fudge, to);
}
emit_exponent(state, exponent - fudge);
}
