Struct spectrusty_core::chip::UlaPlusRegFlags

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pub struct UlaPlusRegFlags { /* private fields */ }

Expand description

ULAplus register port flags.

Implementations§

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pub const fn empty() -> Self

Returns an empty set of flags.

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pub const fn all() -> Self

Returns the set containing all flags.

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pub const fn bits(&self) -> u8

Returns the raw value of the flags currently stored.

Examples found in repository ?

src/chip/flags.rs (line 428)

    pub fn palette_group(self) -> Option<u8> {
        if (self & UlaPlusRegFlags::GROUP_MASK) == UlaPlusRegFlags::PALETTE_GROUP {
            return Some((self & UlaPlusRegFlags::PALETTE_MASK).bits())
        }
        None
    }

    /// Returns an `true` if `self` selects a mode group.
    pub fn is_mode_group(self) -> bool {
        (self & UlaPlusRegFlags::GROUP_MASK) == UlaPlusRegFlags::MODE_GROUP
    }
    /// Returns a color index from high resolution color mask: [0, 7].
    #[inline]
    pub fn hires_color_index(self) -> u8 {
        (self & UlaPlusRegFlags::HIRES_COLOR_MASK).bits() >> 3
    }
    /// Returns `true` if a screen high resolution bit is 1. Otherwise returns `false`.
    #[inline]
    pub fn is_screen_hi_res(self) -> bool {
        self.intersects(UlaPlusRegFlags::SCREEN_HI_RES)
    }
}

impl From<UlaPlusRegFlags> for u8 {
    #[inline]
    fn from(flags: UlaPlusRegFlags) -> u8 {
        flags.bits()
    }

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pub const fn from_bits(bits: u8) -> Option<Self>

Convert from underlying bit representation, unless that representation contains bits that do not correspond to a flag.

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pub const fn from_bits_truncate(bits: u8) -> Self

Convert from underlying bit representation, dropping any bits that do not correspond to flags.

Examples found in repository ?

src/chip/flags.rs (lines 370-374)

    pub fn into_plus_mode(self) -> UlaPlusRegFlags {
        UlaPlusRegFlags::from_bits_truncate(
            (self & (ScldCtrlFlags::SCREEN_MODE_MASK
                     |ScldCtrlFlags::HIRES_COLOR_MASK)
            ).bits()
        )|UlaPlusRegFlags::MODE_GROUP
    }
    /// Returns a color index from high resolution color mask: [0, 7].
    #[inline]
    pub fn hires_color_index(self) -> u8 {
        (self & ScldCtrlFlags::HIRES_COLOR_MASK).bits() >> 3
    }
    /// Returns `true` if a map ex rom bit is 1. Otherwise returns `false`.
    #[inline]
    pub fn is_map_ex_rom(self) -> bool {
        self.intersects(ScldCtrlFlags::MAP_EX_ROM)
    }
    /// Returns `true` if a interrupt disabled bit is 1. Otherwise returns `false`.
    #[inline]
    pub fn is_intr_disabled(self) -> bool {
        self.intersects(ScldCtrlFlags::INTR_DISABLED)
    }
    /// Returns `true` if a screen high resolution bit is 1. Otherwise returns `false`.
    #[inline]
    pub fn is_screen_hi_res(self) -> bool {
        self.intersects(ScldCtrlFlags::SCREEN_HI_RES)
    }
    /// Returns `true` if a screen high color bit is 1. Otherwise returns `false`.
    #[inline]
    pub fn is_screen_hi_attrs(self) -> bool {
        self.intersects(ScldCtrlFlags::SCREEN_HI_ATTRS)
    }
    /// Returns `true` if a screen secondary bit is 1. Otherwise returns `false`.
    #[inline]
    pub fn is_screen_secondary(self) -> bool {
        self.intersects(ScldCtrlFlags::SCREEN_SECONDARY)
    }
}

impl From<ScldCtrlFlags> for u8 {
    #[inline]
    fn from(flags: ScldCtrlFlags) -> u8 {
        flags.bits()
    }
}

impl From<u8> for ScldCtrlFlags {
    #[inline]
    fn from(flags: u8) -> ScldCtrlFlags {
        ScldCtrlFlags::from_bits_truncate(flags)
    }
}

/****************************** UlaPlusRegFlags ******************************/

impl UlaPlusRegFlags {
    /// Returns an `index` [0, 63] to the palette entry if `self` selects a palette group.
    pub fn palette_group(self) -> Option<u8> {
        if (self & UlaPlusRegFlags::GROUP_MASK) == UlaPlusRegFlags::PALETTE_GROUP {
            return Some((self & UlaPlusRegFlags::PALETTE_MASK).bits())
        }
        None
    }

    /// Returns an `true` if `self` selects a mode group.
    pub fn is_mode_group(self) -> bool {
        (self & UlaPlusRegFlags::GROUP_MASK) == UlaPlusRegFlags::MODE_GROUP
    }
    /// Returns a color index from high resolution color mask: [0, 7].
    #[inline]
    pub fn hires_color_index(self) -> u8 {
        (self & UlaPlusRegFlags::HIRES_COLOR_MASK).bits() >> 3
    }
    /// Returns `true` if a screen high resolution bit is 1. Otherwise returns `false`.
    #[inline]
    pub fn is_screen_hi_res(self) -> bool {
        self.intersects(UlaPlusRegFlags::SCREEN_HI_RES)
    }
}

impl From<UlaPlusRegFlags> for u8 {
    #[inline]
    fn from(flags: UlaPlusRegFlags) -> u8 {
        flags.bits()
    }
}

impl From<u8> for UlaPlusRegFlags {
    #[inline]
    fn from(flags: u8) -> UlaPlusRegFlags {
        UlaPlusRegFlags::from_bits_truncate(flags)
    }

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pub const unsafe fn from_bits_unchecked(bits: u8) -> Self

Convert from underlying bit representation, preserving all bits (even those not corresponding to a defined flag).

Safety

The caller of the bitflags! macro can chose to allow or disallow extra bits for their bitflags type.

The caller of from_bits_unchecked() has to ensure that all bits correspond to a defined flag or that extra bits are valid for this bitflags type.

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pub const fn is_empty(&self) -> bool

Returns true if no flags are currently stored.

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pub const fn is_all(&self) -> bool

Returns true if all flags are currently set.

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pub const fn intersects(&self, other: Self) -> bool

Returns true if there are flags common to both self and other.

Examples found in repository ?

src/chip/flags.rs (line 445)

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    pub fn is_screen_hi_res(self) -> bool {
        self.intersects(UlaPlusRegFlags::SCREEN_HI_RES)
    }

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pub const fn contains(&self, other: Self) -> bool

Returns true if all of the flags in other are contained within self.

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pub fn insert(&mut self, other: Self)

Inserts the specified flags in-place.

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pub fn remove(&mut self, other: Self)

Removes the specified flags in-place.

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pub fn toggle(&mut self, other: Self)

Toggles the specified flags in-place.

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pub fn set(&mut self, other: Self, value: bool)

Inserts or removes the specified flags depending on the passed value.

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pub const fn intersection(self, other: Self) -> Self

Returns the intersection between the flags in self and other.

Specifically, the returned set contains only the flags which are present in both self and other.

This is equivalent to using the & operator (e.g. ops::BitAnd), as in flags & other.

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pub const fn union(self, other: Self) -> Self

Returns the union of between the flags in self and other.

Specifically, the returned set contains all flags which are present in either self or other, including any which are present in both (see Self::symmetric_difference if that is undesirable).

This is equivalent to using the | operator (e.g. ops::BitOr), as in flags | other.

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pub const fn difference(self, other: Self) -> Self

Returns the difference between the flags in self and other.

Specifically, the returned set contains all flags present in self, except for the ones present in other.

It is also conceptually equivalent to the “bit-clear” operation: flags & !other (and this syntax is also supported).

This is equivalent to using the - operator (e.g. ops::Sub), as in flags - other.

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pub const fn symmetric_difference(self, other: Self) -> Self

Returns the symmetric difference between the flags in self and other.

Specifically, the returned set contains the flags present which are present in self or other, but that are not present in both. Equivalently, it contains the flags present in exactly one of the sets self and other.

This is equivalent to using the ^ operator (e.g. ops::BitXor), as in flags ^ other.

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