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Charset

Enum Charset 

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pub enum Charset {
    Utf8,
    Latin1,
    Win1252,
    Dos(&'static [char; 128]),
    Unknown,
}
Expand description

Charset da conexão, usado para decodificar CHAR/VARCHAR vindos do servidor.

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Utf8

UTF-8 (o padrão do driver). Também cobre UNICODE_FSS.

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Latin1

ISO-8859-1 (Latin-1): cada byte 0x00..=0xFF é o code point U+0000..=U+00FF.

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Win1252

Windows-1252: como Latin-1, mas 0x80..=0x9F têm mapeamento próprio.

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Dos(&'static [char; 128])

Code page DOS/OEM single-byte (CP437/850/852/860/…): bytes < 0x80 são ASCII; 0x80..=0xFF seguem a tabela embutida. Sempre disponível.

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Unknown

Charset não reconhecido: decodifica como UTF-8 com perdas.

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impl Charset

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pub fn from_name(name: &str) -> Self

Resolve a partir do nome do charset da conexão (ex.: "UTF8", "WIN1252", "ISO8859_1", "SJIS_0208"). A comparação ignora caixa e separadores (-, _). Os multibyte e single-byte extras só resolvem com a feature charset-full; sem ela viram Charset::Unknown (UTF-8 com perdas).

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pub fn decode(self, raw: &[u8]) -> String

Decodifica bytes para String conforme o charset.

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pub fn encode(self, s: &str) -> Vec<u8>

Codifica uma &str para bytes conforme o charset (o inverso de Self::decode), para enviar parâmetros de texto ao servidor numa conexão não-UTF8. Para Latin-1/Win-1252, caracteres não representáveis viram ?; para os charsets do encoding_rs, viram referências numéricas HTML (&#N;), conforme o comportamento da biblioteca.

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impl Clone for Charset

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fn clone(&self) -> Charset

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Copy for Charset

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impl Debug for Charset

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl Default for Charset

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fn default() -> Charset

Returns the “default value” for a type. Read more
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impl Eq for Charset

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impl PartialEq for Charset

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fn eq(&self, other: &Charset) -> bool

Tests for self and other values to be equal, and is used by ==.
1.0.0 (const: unstable) · Source§

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl StructuralPartialEq for Charset

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Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<ST, DT> CastableFrom<ST, Initialized, Initialized> for DT
where ST: ?Sized, DT: ?Sized,

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impl<ST, DT> CastableFrom<ST, Uninit, Uninit> for DT
where ST: ?Sized, DT: ?Sized,

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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> Read<Exclusive, BecauseExclusive> for T
where T: ?Sized,

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impl<T> Same for T

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type Output = T

Should always be Self
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V