System.OsPath.Data.ByteString.Short.Internal

Deprecated: Use System.OsString.Data.ByteString.Short.Internal from os-string >= 2.0.0 package instead. This module will be removed in filepath >= 1.5.

Internal low-level utilities mostly for Word16, such as byte-array operations and other stuff not meant to be exported from Word16 module.

Documentation

_nul :: Word16

isSpace :: Word16 -> Bool

word16ToChar :: Word16 -> Char

Total conversion to char.

create :: Int -> (forall s. MBA s -> ST s ()) -> ShortByteString

asBA :: ShortByteString -> BA

data BA

Constructors

BA# ByteArray#

data MBA s

Constructors

MBA# (MutableByteArray# s)

newPinnedByteArray :: Int -> ST s (MBA s)

newByteArray :: Int -> ST s (MBA s)

copyByteArray :: BA -> Int -> MBA s -> Int -> Int -> ST s ()

unsafeFreezeByteArray :: MBA s -> ST s BA

copyAddrToByteArray :: Ptr a -> MBA RealWorld -> Int -> Int -> ST RealWorld ()

packCWString :: Ptr Word16 -> IO ShortByteString

O(n). Construct a new ShortByteString from a CWString. The resulting ShortByteString is an immutable copy of the original CWString, and is managed on the Haskell heap. The original CWString must be null terminated.

Since: 0.10.10.0

packCWStringLen :: (Ptr Word16, Int) -> IO ShortByteString

O(n). Construct a new ShortByteString from a CWStringLen. The resulting ShortByteString is an immutable copy of the original CWStringLen. The ShortByteString is a normal Haskell value and will be managed on the Haskell heap.

Since: 0.10.10.0

useAsCWString :: ShortByteString -> (Ptr Word16 -> IO a) -> IO a

O(n) construction. Use a ShortByteString with a function requiring a null-terminated CWString. The CWString is a copy and will be freed automatically; it must not be stored or used after the subcomputation finishes.

Since: 0.10.10.0

useAsCWStringLen :: ShortByteString -> ((Ptr Word16, Int) -> IO a) -> IO a

O(n) construction. Use a ShortByteString with a function requiring a CWStringLen. As for useAsCWString this function makes a copy of the original ShortByteString. It must not be stored or used after the subcomputation finishes.

Since: 0.10.10.0

newCWString :: ShortByteString -> IO (Ptr Word16)

O(n) construction. Use a ShortByteString with a function requiring a CWStringLen. As for useAsCWString this function makes a copy of the original ShortByteString. It must not be stored or used after the subcomputation finishes.

Since: 0.10.10.0

moduleErrorIO :: String -> String -> IO a

moduleErrorMsg :: String -> String -> String

packWord16 :: [Word16] -> ShortByteString

packLenWord16 :: Int -> [Word16] -> ShortByteString

unpackWord16 :: ShortByteString -> [Word16]

packWord16Rev :: [Word16] -> ShortByteString

packLenWord16Rev :: Int -> [Word16] -> ShortByteString

writeWord16Array

Arguments

:: MBA s

-> Int

Word8 index (not Word16)

-> Word16

-> ST s ()

This isn't strictly Word16 array write. Instead it's two consecutive Word8 array writes to avoid endianness issues due to primops doing automatic alignment based on host platform. We want to always write LE to the byte array.

indexWord8Array

Arguments

:: BA

-> Int

Word8 index

-> Word8

indexWord16Array

Arguments

:: BA

-> Int

Word8 index (not Word16)

-> Word16

This isn't strictly Word16 array read. Instead it's two Word8 array reads to avoid endianness issues due to primops doing automatic alignment based on host platform. We expect the byte array to be LE always.

encodeWord16LE#

Arguments

:: Word16#

Word16

-> (# Word8#, Word8# #)

Word8 (LSB, MSB)

decodeWord16LE#

Arguments

:: (# Word8#, Word8# #)

Word8 (LSB, MSB)

-> Word16#

Word16

setByteArray :: MBA s -> Int -> Int -> Int -> ST s ()

copyMutableByteArray :: MBA s -> Int -> MBA s -> Int -> Int -> ST s ()

createAndTrim :: Int -> (forall s. MBA s -> ST s (Int, a)) -> (ShortByteString, a)

Given the maximum size needed and a function to make the contents of a ShortByteString, createAndTrim makes the ShortByteString. The generating function is required to return the actual final size (<= the maximum size) and the result value. The resulting byte array is realloced to this size.

createAndTrim' :: Int -> (forall s. MBA s -> ST s Int) -> ShortByteString

createAndTrim'' :: Int -> (forall s. MBA s -> MBA s -> ST s (Int, Int)) -> (ShortByteString, ShortByteString)

findIndexOrLength :: (Word16 -> Bool) -> ShortByteString -> Int

findFromEndUntil :: (Word16 -> Bool) -> ShortByteString -> Int

Returns the length of the substring matching, not the index. If no match, returns 0.

assertEven :: ShortByteString -> ShortByteString

errorEmptySBS :: HasCallStack => String -> a

moduleError :: HasCallStack => String -> String -> a

compareByteArraysOff

Arguments

:: BA

array 1

-> Int

offset for array 1

-> BA

array 2

-> Int

offset for array 2

-> Int

length to compare

-> Int

like memcmp