packedstring-0.1.0.0: (Deprecated) Packed Strings.ContentsIndex
Data.PackedString
Portabilityportable
Stabilityexperimental
Maintainerlibraries@haskell.org
Contents
The PackedString type
Converting to and from PackedStrings
I/O with PackedStrings
List-like manipulation functions
Description
This API is deprecated. You might be able to use Data.ByteString or Data.ByteString.Char8, provided you don't need full Unicode support. The long term aim is to provide a Unicode layer on Data.ByteString, and then to provide a replacement for this Data.PackedString API based on that.
Synopsis
data PackedString
packString :: String -> PackedString
unpackPS :: PackedString -> String
hPutPS :: Handle -> PackedString -> IO ()
hGetPS :: Handle -> Int -> IO PackedString
nilPS :: PackedString
consPS :: Char -> PackedString -> PackedString
headPS :: PackedString -> Char
tailPS :: PackedString -> PackedString
nullPS :: PackedString -> Bool
appendPS :: PackedString -> PackedString -> PackedString
lengthPS :: PackedString -> Int
indexPS :: PackedString -> Int -> Char
mapPS :: (Char -> Char) -> PackedString -> PackedString
filterPS :: (Char -> Bool) -> PackedString -> PackedString
reversePS :: PackedString -> PackedString
concatPS :: [PackedString] -> PackedString
elemPS :: Char -> PackedString -> Bool
substrPS :: PackedString -> Int -> Int -> PackedString
takePS :: Int -> PackedString -> PackedString
dropPS :: Int -> PackedString -> PackedString
splitAtPS :: Int -> PackedString -> (PackedString, PackedString)
foldlPS :: (a -> Char -> a) -> a -> PackedString -> a
foldrPS :: (Char -> a -> a) -> a -> PackedString -> a
takeWhilePS :: (Char -> Bool) -> PackedString -> PackedString
dropWhilePS :: (Char -> Bool) -> PackedString -> PackedString
spanPS :: (Char -> Bool) -> PackedString -> (PackedString, PackedString)
breakPS :: (Char -> Bool) -> PackedString -> (PackedString, PackedString)
linesPS :: PackedString -> [PackedString]
unlinesPS :: [PackedString] -> PackedString
wordsPS :: PackedString -> [PackedString]
unwordsPS :: [PackedString] -> PackedString
splitPS :: Char -> PackedString -> [PackedString]
splitWithPS :: (Char -> Bool) -> PackedString -> [PackedString]
joinPS :: PackedString -> [PackedString] -> PackedString
The PackedString type
data PackedString
A space-efficient representation of a String, which supports various efficient operations. A PackedString contains full Unicode Chars.
show/hide Instances
Converting to and from PackedStrings
packString :: String -> PackedString
Convert a String into a PackedString
unpackPS :: PackedString -> String
Convert a PackedString into a String
I/O with PackedStrings
hPutPS :: Handle -> PackedString -> IO ()

Outputs a PackedString to the specified Handle.

NOTE: the representation of the PackedString in the file is assumed to be in the ISO-8859-1 encoding. In other words, only the least significant byte is taken from each character in the PackedString.

hGetPS :: Handle -> Int -> IO PackedString

Read a PackedString directly from the specified Handle. This is far more efficient than reading the characters into a String and then using packString.

NOTE: as with hPutPS, the string representation in the file is assumed to be ISO-8859-1.

List-like manipulation functions
nilPS :: PackedString
The nilPS value is the empty string.
consPS :: Char -> PackedString -> PackedString
The consPS function prepends the given character to the given string.
headPS :: PackedString -> Char
The headPS function returns the first element of a PackedString or throws an error if the string is empty.
tailPS :: PackedString -> PackedString
The tailPS function returns the tail of a PackedString or throws an error if the string is empty.
nullPS :: PackedString -> Bool
The nullPS function returns True iff the argument is null.
appendPS :: PackedString -> PackedString -> PackedString
The appendPS function appends the second string onto the first.
lengthPS :: PackedString -> Int
The lengthPS function returns the length of the input list. Analogous to length.
indexPS :: PackedString -> Int -> Char
The indexPS function returns the character in the string at the given position.
mapPS :: (Char -> Char) -> PackedString -> PackedString
The mapPS function applies a function to each character in the string.
filterPS :: (Char -> Bool) -> PackedString -> PackedString
The filterPS function filters out the appropriate substring.
reversePS :: PackedString -> PackedString
The reversePS function reverses the string.
concatPS :: [PackedString] -> PackedString
The concatPS function concatenates a list of PackedStrings.
elemPS :: Char -> PackedString -> Bool
The elemPS function returns True iff the given element is in the string.
substrPS :: PackedString -> Int -> Int -> PackedString
The substrPS function takes a PackedString and two indices and returns the substring of the input string between (and including) these indices.
takePS :: Int -> PackedString -> PackedString
The takePS function takes the first n characters of a PackedString.
dropPS :: Int -> PackedString -> PackedString
The dropPS function drops the first n characters of a PackedString.
splitAtPS :: Int -> PackedString -> (PackedString, PackedString)
The splitWithPS function splits a PackedString at a given index.
foldlPS :: (a -> Char -> a) -> a -> PackedString -> a
The foldlPS function behaves like foldl on PackedStrings.
foldrPS :: (Char -> a -> a) -> a -> PackedString -> a
The foldrPS function behaves like foldr on PackedStrings.
takeWhilePS :: (Char -> Bool) -> PackedString -> PackedString
The takeWhilePS function is analogous to the takeWhile function.
dropWhilePS :: (Char -> Bool) -> PackedString -> PackedString
The dropWhilePS function is analogous to the dropWhile function.
spanPS :: (Char -> Bool) -> PackedString -> (PackedString, PackedString)
The spanPS function returns a pair containing the result of running both takeWhilePS and dropWhilePS.
breakPS :: (Char -> Bool) -> PackedString -> (PackedString, PackedString)
The breakPS function breaks a string at the first position which satisfies the predicate.
linesPS :: PackedString -> [PackedString]
The linesPS function splits the input on line-breaks.
unlinesPS :: [PackedString] -> PackedString
The unlinesPS function concatenates the input list after interspersing newlines.
wordsPS :: PackedString -> [PackedString]
The wordsPS function is analogous to the words function.
unwordsPS :: [PackedString] -> PackedString
The unwordsPS function is analogous to the unwords function.
splitPS :: Char -> PackedString -> [PackedString]
The splitPS function splits the input string on each occurrence of the given Char.
splitWithPS :: (Char -> Bool) -> PackedString -> [PackedString]
The splitWithPS function takes a character predicate and splits the input string at each character which satisfies the predicate.
joinPS :: PackedString -> [PackedString] -> PackedString
The joinPS function takes a PackedString and a list of PackedStrings and concatenates the list after interspersing the first argument between each element of the list.
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