pub fn load_from_text_file<Key, Value, ReadCallback, ProcessedCallback, Reader>(
    file: &mut Reader,
    integrity: &mut Option<Integrity>,
    mut after_read_callback: Option<ReadCallback>,
    mut processed_callback: ProcessedCallback
) -> Result<(), LoadFileError>
    where
        Key: DeserializeOwned,
        Value: DeserializeOwned,
        ProcessedCallback: FnMut(MapOperation<Key, Value>) -> Result<(), ()>,
        ReadCallback: FnMut(&mut String) -> Result<(), Box<dyn std::error::Error>>,
        Reader: std::io::Read,
{
    let mut reader = BufReader::new(file);
    let mut line = String::with_capacity(150);
    let mut line_num = 1;
    while reader.read_line(&mut line)? > 0 {
        if let Some(callback) = &mut after_read_callback {
            callback(&mut line)
                .map_err(|err| LoadFileError::InterruptedWithBeforeReadCallback(err))?;
        }

        if !line.ends_with('\n') {
            return Err(LoadFileError::LastLineWithoutEndLine { line_num });
        }

        const MIN_LINE_LEN: usize = 4;
        if line.len() < MIN_LINE_LEN {
            return Err(LoadFileError::FileLineLengthLessThenMinimum { line_num });
        }

        let line_data = if let Some(integrity) = integrity {
            process_line_integrity(&line, integrity, line_num)?
        } else {
            &line[..]
        };

        match &line_data[..4] {
            "ins " => {
                let (key, val) = serde_json::from_str(&line_data[4..]).map_err(|err| LoadFileError::DeserializeJsonError { err, line_num })?;
                processed_callback(MapOperation::Insert(key, val)).map_err(|()| LoadFileError::Interrupted)?;
            },
            "rem " => {
                let key = serde_json::from_str(&line_data[4..]).map_err(|err| LoadFileError::DeserializeJsonError { err, line_num })?;
                processed_callback(MapOperation::Remove(key)).map_err(|()| LoadFileError::Interrupted)?;
            },
            _ => {
                return Err(LoadFileError::NoLineDefinition { line_num });
            }
        }

        line_num += 1;
        line.clear();
    }

    Ok(())
}
/// Load from text format file all map history records and call 'ProcessedCallback' callback for each.
Load from text format file all map history records and call 'ProcessedCallback' callback for each.
Load from text format file all map history records and call ' ProcessedCallback ' callback for each .
pub fn load_from_text_file<Key, Value, ReadCallback, ProcessedCallback, Reader>(
    file: &mut Reader,
    integrity: &mut Option<Integrity>,
    mut after_read_callback: Option<ReadCallback>,
    mut processed_callback: ProcessedCallback
) -> Result<(), LoadFileError>
    where
        Key: DeserializeOwned,
        Value: DeserializeOwned,
        ProcessedCallback: FnMut(MapOperation<Key, Value>) -> Result<(), ()>,
        ReadCallback: FnMut(&mut String) -> Result<(), Box<dyn std::error::Error>>,
        Reader: std::io::Read,
{
    let mut reader = BufReader::new(file);
    let mut line = String::with_capacity(150);
    let mut line_num = 1;
    while reader.read_line(&mut line)? > 0 {
        if let Some(callback) = &mut after_read_callback {
            callback(&mut line)
                .map_err(|err| LoadFileError::InterruptedWithBeforeReadCallback(err))?;
        }
        if !line.ends_with('\n') {
            return Err(LoadFileError::LastLineWithoutEndLine { line_num });
        }
        const MIN_LINE_LEN: usize = 4;
        if line.len() < MIN_LINE_LEN {
            return Err(LoadFileError::FileLineLengthLessThenMinimum { line_num });
        }
        let line_data = if let Some(integrity) = integrity {
            process_line_integrity(&line, integrity, line_num)?
        } else {
            &line[..]
        };
        match &line_data[..4] {
            "ins " => {
                let (key, val) = serde_json::from_str(&line_data[4..]).map_err(|err| LoadFileError::DeserializeJsonError { err, line_num })?;
                processed_callback(MapOperation::Insert(key, val)).map_err(|()| LoadFileError::Interrupted)?;
            },
            "rem " => {
                let key = serde_json::from_str(&line_data[4..]).map_err(|err| LoadFileError::DeserializeJsonError { err, line_num })?;
                processed_callback(MapOperation::Remove(key)).map_err(|()| LoadFileError::Interrupted)?;
            },
            _ => {
                return Err(LoadFileError::NoLineDefinition { line_num });
            }
        }
        line_num += 1;
        line.clear();
    }
    Ok(())
}
pub fn load_from_text_file < Key , Value , ReadCallback , ProcessedCallback , Reader > ( file : & mut Reader , integrity : & mut Option < Integrity > , mut after_read_callback : Option < ReadCallback > , mut processed_callback : ProcessedCallback ) -> Result < ( ) , LoadFileError > where Key : DeserializeOwned , Value : DeserializeOwned , ProcessedCallback : FnMut ( MapOperation < Key , Value > ) -> Result < ( ) , ( ) > , ReadCallback : FnMut ( & mut String ) -> Result < ( ) , Box < dyn std :: error :: Error > > , Reader : std :: io :: Read , { let mut reader = BufReader :: new ( file ) ; let mut line = String :: with_capacity ( 150 ) ; let mut line_num = 1 ; while reader . read_line ( & mut line ) ? > 0 { if let Some ( callback ) = & mut after_read_callback { callback ( & mut line ) . map_err ( | err | LoadFileError :: InterruptedWithBeforeReadCallback ( err ) ) ? ; } if ! line . ends_with ( '\n' ) { return Err ( LoadFileError :: LastLineWithoutEndLine { line_num } ) ; } const MIN_LINE_LEN : usize = 4 ; if line . len ( ) < MIN_LINE_LEN { return Err ( LoadFileError :: FileLineLengthLessThenMinimum { line_num } ) ; } let line_data = if let Some ( integrity ) = integrity { process_line_integrity ( & line , integrity , line_num ) ? } else { & line [ .. ] } ; match & line_data [ .. 4 ] { " " => { let ( key , val ) = serde_json :: from_str ( & line_data [ 4 .. ] ) . map_err ( | err | LoadFileError :: DeserializeJsonError { err , line_num } ) ? ; processed_callback ( MapOperation :: Insert ( key , val ) ) . map_err ( | ( ) | LoadFileError :: Interrupted ) ? ; } , " " => { let key = serde_json :: from_str ( & line_data [ 4 .. ] ) . map_err ( | err | LoadFileError :: DeserializeJsonError { err , line_num } ) ? ; processed_callback ( MapOperation :: Remove ( key ) ) . map_err ( | ( ) | LoadFileError :: Interrupted ) ? ; } , _ => { return Err ( LoadFileError :: NoLineDefinition { line_num } ) ; } } line_num += 1 ; line . clear ( ) ; } Ok ( ( ) ) }
Load from text format file all map history records and call 'ProcessedCallback' callback for each.
Load from text format file all map history records and call ' ProcessedCallback ' callback for each .
file
&mut Reader
integrity
&mut Option<Integrity>
after_read_callback
Option<ReadCallback>
processed_callback
ProcessedCallback
file
&mut Reader
integrity
&mut Option<Integrity>
after_read_callback
Option<ReadCallback>
processed_callback
ProcessedCallback