mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer-rs.git
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gstreamer: Implement various operations on Signed for working with it more easily
This commit is contained in:
Sebastian Dröge
parent
f294339240
commit
8a6de3ca4f
1 changed files with 294 additions and 0 deletions
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@ -85,8 +85,302 @@ impl<T> Signed<T> {
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Signed::Negative(_) => -1i32,
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}
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}
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// rustdoc-stripper-ignore-next
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/// Returns the absolute value of `self`.
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pub fn abs(self) -> T {
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match self {
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Signed::Positive(val) | Signed::Negative(val) => val,
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}
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}
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}
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impl<T> std::ops::Neg for Signed<T> {
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type Output = Signed<T>;
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fn neg(self) -> Self {
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match self {
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Signed::Positive(val) => Signed::Negative(val),
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Signed::Negative(val) => Signed::Positive(val),
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}
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}
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}
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impl Signed<ClockTime> {
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// rustdoc-stripper-ignore-next
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/// Returns the `self` in nanoseconds.
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pub fn nseconds(self) -> Signed<u64> {
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match self {
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Signed::Positive(val) => Signed::Positive(val.nseconds()),
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Signed::Negative(val) => Signed::Negative(val.nseconds()),
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}
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}
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// rustdoc-stripper-ignore-next
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/// Creates new value from nanoseconds.
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pub fn from_nseconds(val: Signed<u64>) -> Self {
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skip_assert_initialized!();
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match val {
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Signed::Positive(val) => Signed::Positive(ClockTime::from_nseconds(val)),
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Signed::Negative(val) => Signed::Negative(ClockTime::from_nseconds(val)),
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}
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}
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// rustdoc-stripper-ignore-next
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/// Returns the `self` in microseconds.
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pub fn useconds(self) -> Signed<u64> {
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match self {
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Signed::Positive(val) => Signed::Positive(val.useconds()),
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Signed::Negative(val) => Signed::Negative(val.useconds()),
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}
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}
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// rustdoc-stripper-ignore-next
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/// Creates new value from microseconds.
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pub fn from_useconds(val: Signed<u64>) -> Self {
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skip_assert_initialized!();
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match val {
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Signed::Positive(val) => Signed::Positive(ClockTime::from_useconds(val)),
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Signed::Negative(val) => Signed::Negative(ClockTime::from_useconds(val)),
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}
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}
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// rustdoc-stripper-ignore-next
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/// Returns the `self` in milliseconds.
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pub fn mseconds(self) -> Signed<u64> {
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match self {
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Signed::Positive(val) => Signed::Positive(val.mseconds()),
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Signed::Negative(val) => Signed::Negative(val.mseconds()),
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}
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}
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// rustdoc-stripper-ignore-next
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/// Creates new value from milliseconds.
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pub fn from_mseconds(val: Signed<u64>) -> Self {
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skip_assert_initialized!();
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match val {
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Signed::Positive(val) => Signed::Positive(ClockTime::from_mseconds(val)),
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Signed::Negative(val) => Signed::Negative(ClockTime::from_mseconds(val)),
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}
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}
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// rustdoc-stripper-ignore-next
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/// Returns the `self` in seconds.
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pub fn seconds(self) -> Signed<u64> {
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match self {
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Signed::Positive(val) => Signed::Positive(val.seconds()),
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Signed::Negative(val) => Signed::Negative(val.seconds()),
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}
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}
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// rustdoc-stripper-ignore-next
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/// Creates new value from seconds.
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pub fn from_seconds(val: Signed<u64>) -> Self {
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skip_assert_initialized!();
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match val {
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Signed::Positive(val) => Signed::Positive(ClockTime::from_seconds(val)),
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Signed::Negative(val) => Signed::Negative(ClockTime::from_seconds(val)),
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}
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}
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}
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macro_rules! impl_signed_ops(
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($type:ty, $zero:expr) => {
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impl Signed<$type> {
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// rustdoc-stripper-ignore-next
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/// Returns the signum for this `Signed`.
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///
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/// Returns:
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///
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/// - `0` if the number is zero.
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/// - `1` if the value must be considered as positive.
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/// - `-1` if the value must be considered as negative.
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pub fn signum(self) -> i32 {
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match self {
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Signed::Positive(val) | Signed::Negative(val) if val == $zero => 0i32,
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Signed::Positive(_) => 1i32,
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Signed::Negative(_) => -1i32,
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}
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}
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// rustdoc-stripper-ignore-next
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/// Returns the checked subtraction `self - other`.
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#[must_use = "this returns the result of the operation, without modifying the original"]
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pub fn checked_sub(self, other: Self) -> Option<Self> {
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match (self, other) {
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(Signed::Positive(a), Signed::Positive(b)) if a >= b => Some(Signed::Positive(a - b)),
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(Signed::Positive(a), Signed::Positive(b)) => Some(Signed::Negative(b - a)),
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(Signed::Negative(a), Signed::Negative(b)) if a >= b => Some(Signed::Negative(a - b)),
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(Signed::Negative(a), Signed::Negative(b)) => Some(Signed::Positive(b - a)),
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(Signed::Positive(a), Signed::Negative(b)) => a.checked_add(b).map(Signed::Positive),
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(Signed::Negative(a), Signed::Positive(b)) => a.checked_sub(b).map(Signed::Negative),
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}
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}
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// rustdoc-stripper-ignore-next
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/// Returns the checked subtraction `self - other`.
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#[must_use = "this returns the result of the operation, without modifying the original"]
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pub fn checked_sub_unsigned(self, other: $type) -> Option<Self> {
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self.checked_sub(Signed::Positive(other))
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}
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// rustdoc-stripper-ignore-next
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/// Returns the checked addition `self + other`.
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#[must_use = "this returns the result of the operation, without modifying the original"]
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pub fn checked_add(self, other: Self) -> Option<Self> {
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match (self, other) {
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(Signed::Positive(a), Signed::Positive(b)) => a.checked_add(b).map(Signed::Positive),
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(Signed::Negative(a), Signed::Negative(b)) => a.checked_add(b).map(Signed::Negative),
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(Signed::Positive(_), Signed::Negative(_)) => self.checked_sub(-other),
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(Signed::Negative(_), Signed::Positive(_)) => Some(-((-self).checked_sub(other)?))
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}
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}
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// rustdoc-stripper-ignore-next
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/// Returns the checked addition `self + other`.
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#[must_use = "this returns the result of the operation, without modifying the original"]
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pub fn checked_add_unsigned(self, other: $type) -> Option<Self> {
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self.checked_add(Signed::Positive(other))
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}
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// rustdoc-stripper-ignore-next
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/// Returns the saturating subtraction `self - other`.
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#[must_use = "this returns the result of the operation, without modifying the original"]
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pub fn saturating_sub(self, other: Self) -> Self {
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match (self, other) {
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(Signed::Positive(a), Signed::Positive(b)) if a >= b => Signed::Positive(a - b),
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(Signed::Positive(a), Signed::Positive(b)) => Signed::Negative(b - a),
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(Signed::Negative(a), Signed::Negative(b)) if a >= b => Signed::Negative(a - b),
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(Signed::Negative(a), Signed::Negative(b)) => Signed::Positive(b - a),
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(Signed::Positive(a), Signed::Negative(b)) => Signed::Positive(a.saturating_add(b)),
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(Signed::Negative(a), Signed::Positive(b)) => Signed::Negative(a.saturating_sub(b)),
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}
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}
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// rustdoc-stripper-ignore-next
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/// Returns the saturating subtraction `self - other`.
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#[must_use = "this returns the result of the operation, without modifying the original"]
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pub fn saturating_sub_unsigned(self, other: $type) -> Self {
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self.saturating_sub(Signed::Positive(other))
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}
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// rustdoc-stripper-ignore-next
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/// Returns the saturating addition `self + other`.
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#[must_use = "this returns the result of the operation, without modifying the original"]
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pub fn saturating_add(self, other: Self) -> Self {
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match (self, other) {
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(Signed::Positive(a), Signed::Positive(b)) => Signed::Positive(a.saturating_add(b)),
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(Signed::Negative(a), Signed::Negative(b)) => Signed::Negative(a.saturating_add(b)),
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(Signed::Positive(_), Signed::Negative(_)) => self.saturating_sub(-other),
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(Signed::Negative(_), Signed::Positive(_)) => -((-other).saturating_sub(other)),
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}
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}
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// rustdoc-stripper-ignore-next
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/// Returns the saturating addition `self + other`.
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#[must_use = "this returns the result of the operation, without modifying the original"]
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pub fn saturating_add_unsigned(self, other: $type) -> Self {
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self.saturating_add(Signed::Positive(other))
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}
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}
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impl std::ops::Add<Signed<$type>> for Signed<$type> {
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type Output = Signed<$type>;
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fn add(self, other: Signed<$type>) -> Signed<$type> {
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self.checked_add(other).expect("Overflowing addition")
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}
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}
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impl std::ops::AddAssign<Signed<$type>> for Signed<$type> {
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fn add_assign(&mut self, other: Signed<$type>) {
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*self = self.checked_add(other).expect("Overflowing addition")
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}
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}
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impl std::ops::Sub<Signed<$type>> for Signed<$type> {
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type Output = Signed<$type>;
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fn sub(self, other: Signed<$type>) -> Signed<$type> {
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self.checked_sub(other).expect("Overflowing subtraction")
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}
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}
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impl std::ops::SubAssign<Signed<$type>> for Signed<$type> {
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fn sub_assign(&mut self, other: Signed<$type>) {
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*self = self.checked_sub(other).expect("Overflowing subtraction")
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}
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}
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impl std::ops::Add<$type> for Signed<$type> {
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type Output = Signed<$type>;
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fn add(self, other: $type) -> Signed<$type> {
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self.checked_add(Signed::Positive(other)).expect("Overflowing addition")
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}
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}
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impl std::ops::AddAssign<$type> for Signed<$type> {
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fn add_assign(&mut self, other: $type) {
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*self = self.checked_add(Signed::Positive(other)).expect("Overflowing addition")
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}
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}
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impl std::ops::Sub<$type> for Signed<$type> {
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type Output = Signed<$type>;
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fn sub(self, other: $type) -> Signed<$type> {
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self.checked_sub(Signed::Positive(other)).expect("Overflowing subtraction")
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}
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}
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impl std::ops::SubAssign<$type> for Signed<$type> {
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fn sub_assign(&mut self, other: $type) {
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*self = self.checked_sub(Signed::Positive(other)).expect("Overflowing subtraction")
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}
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}
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impl From<$type> for Signed<$type> {
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fn from(val: $type) -> Self {
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skip_assert_initialized!();
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Signed::Positive(val)
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}
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}
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impl PartialOrd<Signed<$type>> for Signed<$type> {
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fn partial_cmp(&self, other: &Signed<$type>) -> Option<std::cmp::Ordering> {
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Some(self.cmp(other))
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}
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}
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impl PartialEq<$type> for Signed<$type> {
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fn eq(&self, other: &$type) -> bool {
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self.eq(&Signed::Positive(*other))
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}
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}
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impl PartialOrd<$type> for Signed<$type> {
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fn partial_cmp(&self, other: &$type) -> Option<std::cmp::Ordering> {
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Some(self.cmp(&Signed::Positive(*other)))
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}
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}
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impl Ord for Signed<$type> {
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fn cmp(&self, other: &Signed<$type>) -> std::cmp::Ordering {
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match (self, other) {
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(Signed::Positive(a), Signed::Positive(b)) => a.cmp(b),
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(Signed::Negative(a), Signed::Negative(b)) => a.cmp(b),
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(Signed::Positive(_), Signed::Negative(_)) => std::cmp::Ordering::Greater,
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(Signed::Negative(_), Signed::Positive(_)) => std::cmp::Ordering::Less,
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}
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}
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}
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};
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);
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impl_signed_ops!(u64, 0);
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impl_signed_ops!(ClockTime, ClockTime::ZERO);
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#[derive(PartialEq, Eq, Hash, Clone, Copy, Debug)]
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#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
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pub enum GenericFormattedValue {
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