os-string-2.0.3: Library for manipulating Operating system strings.
Copyright© 2022 Julian Ospald
LicenseMIT
MaintainerJulian Ospald <hasufell@posteo.de>
Stabilityexperimental
Portabilityportable
Safe HaskellSafe-Inferred
LanguageHaskell2010

System.OsString.Data.ByteString.Short.Internal

Description

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

Synopsis

Documentation

word16ToChar :: Word16 -> Char Source #

Total conversion to char.

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

data BA Source #

Constructors

BA# ByteArray# 

data MBA s Source #

Constructors

MBA# (MutableByteArray# s) 

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

packCWString :: Ptr Word16 -> IO ShortByteString Source #

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 Source #

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 Source #

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 Source #

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) Source #

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

writeWord16Array Source #

Arguments

:: MBA s 
-> Int

Word8 index (not Word16)

-> Word16 
-> ST s () 

Encode Word16 as little-endian.

indexWord8Array Source #

Arguments

:: BA 
-> Int

Word8 index

-> Word8 

indexWord16Array Source #

Arguments

:: BA 
-> Int

Word8 index (not Word16)

-> Word16 

Decode Word16 from little-endian.

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

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

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

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 Source #

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

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

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

compareByteArraysOff Source #

Arguments

:: BA

array 1

-> Int

offset for array 1

-> BA

array 2

-> Int

offset for array 2

-> Int

length to compare

-> Int

like memcmp