Trait fmmap::MmapFileExt

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pub trait MmapFileExt {
Show 50 methods // Required methods fn len(&self) -> usize; fn as_slice(&self) -> &[u8] ; fn path(&self) -> &Path; fn metadata(&self) -> Result<MetaData>; fn is_exec(&self) -> bool; fn lock_exclusive(&self) -> Result<()>; fn lock_shared(&self) -> Result<()>; fn try_lock_exclusive(&self) -> Result<()>; fn try_lock_shared(&self) -> Result<()>; fn unlock(&self) -> Result<()>; // Provided methods fn is_empty(&self) -> bool { ... } fn slice(&self, offset: usize, sz: usize) -> &[u8] { ... } fn bytes(&self, offset: usize, sz: usize) -> Result<&[u8]> { ... } fn path_buf(&self) -> PathBuf { ... } fn path_lossy(&self) -> Cow<'_, str> { ... } fn path_string(&self) -> String { ... } fn copy_all_to_vec(&self) -> Vec<u8> { ... } fn copy_range_to_vec(&self, offset: usize, len: usize) -> Vec<u8> { ... } fn write_all_to_new_file<P: AsRef<Path>>( &self, new_file_path: P ) -> Result<()> { ... } fn write_range_to_new_file<P: AsRef<Path>>( &self, new_file_path: P, offset: usize, len: usize ) -> Result<()> { ... } fn reader(&self, offset: usize) -> Result<MmapFileReader<'_>> { ... } fn range_reader( &self, offset: usize, len: usize ) -> Result<MmapFileReader<'_>> { ... } fn read(&self, dst: &mut [u8], offset: usize) -> usize { ... } fn read_exact(&self, dst: &mut [u8], offset: usize) -> Result<()> { ... } fn read_i8(&self, offset: usize) -> Result<i8> { ... } fn read_i16(&self, offset: usize) -> Result<i16> { ... } fn read_i16_le(&self, offset: usize) -> Result<i16> { ... } fn read_isize(&self, offset: usize) -> Result<isize> { ... } fn read_isize_le(&self, offset: usize) -> Result<isize> { ... } fn read_i32(&self, offset: usize) -> Result<i32> { ... } fn read_i32_le(&self, offset: usize) -> Result<i32> { ... } fn read_i64(&self, offset: usize) -> Result<i64> { ... } fn read_i64_le(&self, offset: usize) -> Result<i64> { ... } fn read_i128(&self, offset: usize) -> Result<i128> { ... } fn read_i128_le(&self, offset: usize) -> Result<i128> { ... } fn read_u8(&self, offset: usize) -> Result<u8> { ... } fn read_u16(&self, offset: usize) -> Result<u16> { ... } fn read_u16_le(&self, offset: usize) -> Result<u16> { ... } fn read_usize(&self, offset: usize) -> Result<usize> { ... } fn read_usize_le(&self, offset: usize) -> Result<usize> { ... } fn read_u32(&self, offset: usize) -> Result<u32> { ... } fn read_u32_le(&self, offset: usize) -> Result<u32> { ... } fn read_u64(&self, offset: usize) -> Result<u64> { ... } fn read_u64_le(&self, offset: usize) -> Result<u64> { ... } fn read_u128(&self, offset: usize) -> Result<u128> { ... } fn read_u128_le(&self, offset: usize) -> Result<u128> { ... } fn read_f32(&self, offset: usize) -> Result<f32> { ... } fn read_f32_le(&self, offset: usize) -> Result<f32> { ... } fn read_f64(&self, offset: usize) -> Result<f64> { ... } fn read_f64_le(&self, offset: usize) -> Result<f64> { ... }
}
Available on crate feature sync only.
Expand description

Utility methods to MmapFile

Required Methods§

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fn len(&self) -> usize

Returns the current mmap length

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fn as_slice(&self) -> &[u8]

Returns the underlying slice of the mmap

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fn path(&self) -> &Path

Returns the path of the inner file.

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fn metadata(&self) -> Result<MetaData>

Returns the metadata of file metadata

Metadata information about a file. This structure is returned from the metadata or symlink_metadata function or method and represents known metadata about a file such as its permissions, size, modification times, etc

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fn is_exec(&self) -> bool

Whether the mmap is executable.

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fn lock_exclusive(&self) -> Result<()>

Locks the file for shared usage, blocking if the file is currently locked exclusively.

Notes

This function will do nothing if the underlying is not a real file, e.g. in-memory.

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fn lock_shared(&self) -> Result<()>

Locks the file for exclusive usage, blocking if the file is currently locked.

Notes

This function will do nothing if the underlying is not a real file, e.g. in-memory.

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fn try_lock_exclusive(&self) -> Result<()>

Locks the file for shared usage, or returns a an error if the file is currently locked (see lock_contended_error).

Notes

This function will do nothing if the underlying is not a real file, e.g. in-memory.

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fn try_lock_shared(&self) -> Result<()>

Locks the file for shared usage, or returns a an error if the file is currently locked (see lock_contended_error).Locks the file for shared usage, or returns a an error if the file is currently locked (see lock_contended_error).

Notes

This function will do nothing if the underlying is not a real file, e.g. in-memory.

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fn unlock(&self) -> Result<()>

Unlocks the file.

Notes

This function will do nothing if the underlying is not a real file, e.g. in-memory.

Provided Methods§

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fn is_empty(&self) -> bool

Returns the mmap is empty of not.

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fn slice(&self, offset: usize, sz: usize) -> &[u8]

slice returns data starting from offset off of size sz.

Panics

If there’s not enough data, it would panic.

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fn bytes(&self, offset: usize, sz: usize) -> Result<&[u8]>

bytes returns data starting from offset off of size sz.

Errors

If there’s not enough data, it would return Err(Error::from(ErrorKind::EOF)).

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fn path_buf(&self) -> PathBuf

Returns the path buf of the inner file.

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fn path_lossy(&self) -> Cow<'_, str>

Returns the path lossy string of the inner file.

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fn path_string(&self) -> String

Returns the path string of the inner file.

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fn copy_all_to_vec(&self) -> Vec<u8>

Copy the content of the mmap file to Vec

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fn copy_range_to_vec(&self, offset: usize, len: usize) -> Vec<u8>

Copy a range of content of the mmap file to Vec

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fn write_all_to_new_file<P: AsRef<Path>>(&self, new_file_path: P) -> Result<()>

Write the content of the mmap file to a new file.

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fn write_range_to_new_file<P: AsRef<Path>>( &self, new_file_path: P, offset: usize, len: usize ) -> Result<()>

Write a range of content of the mmap file to new file.

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fn reader(&self, offset: usize) -> Result<MmapFileReader<'_>>

Returns a MmapFileReader which helps read data from mmap like a normal File.

Errors

If there’s not enough data, it would return Err(Error::from(ErrorKind::EOF)).

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fn range_reader(&self, offset: usize, len: usize) -> Result<MmapFileReader<'_>>

Returns a MmapFileReader base on the given offset and len, which helps read data from mmap like a normal File.

Errors

If there’s not enough data, it would return Err(Error::from(ErrorKind::EOF)).

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fn read(&self, dst: &mut [u8], offset: usize) -> usize

Read bytes to the dst buf from the offset, returns how many bytes read.

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fn read_exact(&self, dst: &mut [u8], offset: usize) -> Result<()>

Read the exact number of bytes required to fill buf.

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fn read_i8(&self, offset: usize) -> Result<i8>

Read a signed 8 bit integer from offset.

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fn read_i16(&self, offset: usize) -> Result<i16>

Read a signed 16 bit integer from offset in big-endian byte order.

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fn read_i16_le(&self, offset: usize) -> Result<i16>

Read a signed 16 bit integer from offset in little-endian byte order.

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fn read_isize(&self, offset: usize) -> Result<isize>

Read a signed integer from offset in big-endian byte order.

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fn read_isize_le(&self, offset: usize) -> Result<isize>

Read a signed integer from offset in little-endian byte order.

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fn read_i32(&self, offset: usize) -> Result<i32>

Read a signed 32 bit integer from offset in big-endian byte order.

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fn read_i32_le(&self, offset: usize) -> Result<i32>

Read a signed 32 bit integer from offset in little-endian byte order.

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fn read_i64(&self, offset: usize) -> Result<i64>

Read a signed 64 bit integer from offset in big-endian byte order.

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fn read_i64_le(&self, offset: usize) -> Result<i64>

Read a signed 64 bit integer from offset in little-endian byte order.

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fn read_i128(&self, offset: usize) -> Result<i128>

Read a signed 128 bit integer from offset in big-endian byte order.

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fn read_i128_le(&self, offset: usize) -> Result<i128>

Read a signed 128 bit integer from offset in little-endian byte order.

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fn read_u8(&self, offset: usize) -> Result<u8>

Read an unsigned 8 bit integer from offset.

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fn read_u16(&self, offset: usize) -> Result<u16>

Read an unsigned 16 bit integer from offset in big-endian.

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fn read_u16_le(&self, offset: usize) -> Result<u16>

Read an unsigned 16 bit integer from offset in little-endian.

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fn read_usize(&self, offset: usize) -> Result<usize>

Read an unsigned integer from offset in big-endian byte order.

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fn read_usize_le(&self, offset: usize) -> Result<usize>

Read an unsigned integer from offset in little-endian byte order.

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fn read_u32(&self, offset: usize) -> Result<u32>

Read an unsigned 32 bit integer from offset in big-endian.

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fn read_u32_le(&self, offset: usize) -> Result<u32>

Read an unsigned 32 bit integer from offset in little-endian.

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fn read_u64(&self, offset: usize) -> Result<u64>

Read an unsigned 64 bit integer from offset in big-endian.

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fn read_u64_le(&self, offset: usize) -> Result<u64>

Read an unsigned 64 bit integer from offset in little-endian.

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fn read_u128(&self, offset: usize) -> Result<u128>

Read an unsigned 128 bit integer from offset in big-endian.

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fn read_u128_le(&self, offset: usize) -> Result<u128>

Read an unsigned 128 bit integer from offset in little-endian.

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fn read_f32(&self, offset: usize) -> Result<f32>

Read an IEEE754 single-precision (4 bytes) floating point number from offset in big-endian byte order.

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fn read_f32_le(&self, offset: usize) -> Result<f32>

Read an IEEE754 single-precision (4 bytes) floating point number from offset in little-endian byte order.

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fn read_f64(&self, offset: usize) -> Result<f64>

Read an IEEE754 single-precision (8 bytes) floating point number from offset in big-endian byte order.

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fn read_f64_le(&self, offset: usize) -> Result<f64>

Read an IEEE754 single-precision (8 bytes) floating point number from offset in little-endian byte order.

Implementors§