Hsed.StreamEd

The Sed runtime engine. The execution sequence includes the parseArgs compile (parse) and execute Sed commands.

Documentation

data Status

Constructors

EOF

Cont

Instances

Eq Status

Show Status

data FlowControl

Constructors

Next

Apply the next sed command from the script to the pattern space

Break

Read the new line to the pattern space and apply sed script

Continue

Reapply the sed script to the current pattern space

Goto (Maybe ByteString)

Jump to the marked sed command and apply it to the pattern space

Exit

Quit

Instances

Eq FlowControl

Show FlowControl

runSed :: [FilePath] -> String -> Env -> IO Env

Compile and execute the sed script

compile :: String -> SedState ()

Parse the Sed commands

execute :: [FilePath] -> SedState ()

Execute the parsed Sed commands against input data

processStdin :: SedState ()

The standard input will be used if no file operands are specified

processFiles :: [FilePath] -> SedState ()

Process the input text files

loop :: [SedCmd] -> SedState ()

Cyclically append a line of input without newline into the pattern space

line :: SedState (Status, ByteString)

Read an input line

eval :: [SedCmd] -> SedState FlowControl

Manage the flow control of the Sed commands

goto :: [SedCmd] -> Maybe Label -> [SedCmd]

Transfer control to the command marked with the label

execCmds :: [SedCmd] -> SedState FlowControl

Execute Sed commands

execCmd :: SedCmd -> SedState FlowControl

Execute the Sed function if the address is matched

matchAddress :: Address -> SedState Bool

Check if the address interval is matched

runCmd :: SedFun -> SedState FlowControl

Execute the Sed function

group :: [SedCmd] -> SedState FlowControl

'{cmd...}' Groups subcommands enclosed in {} (braces)

lineNum :: SedState FlowControl

'=' Writes the current line number to standard output as a line

append :: ByteString -> SedState FlowControl

'a\\ntext' Places the text variable in output before reading the next input line

branch :: Maybe Label -> SedState FlowControl

'b label' Transfer control to :label elsewhere in script

change :: ByteString -> SedState FlowControl

'c\\ntext' Replace the lines with the text variable

deleteLine :: SedState FlowControl

d Delete line(s) from pattern space

deletePat :: SedState FlowControl

D Delete first part (up to embedded newline) of multiline pattern space

replacePat :: SedState FlowControl

g Copy contents of hold space into the pattern space

appendPat :: SedState FlowControl

G Append newline followed by contents of hold space to contents of the pattern space.

replaceHold :: SedState FlowControl

h Copy pattern space into hold space

appendHold :: SedState FlowControl

H Append newline and contents of pattern space to contents of the hold space

insert :: ByteString -> SedState FlowControl

'i\\ntext' Writes the text variable to standard output before reading the next line into the pattern space.

test :: Maybe Label -> SedState FlowControl

't label' Jump to line if successful substitutions have been made

substitute :: ByteString -> ByteString -> Flags -> SedState FlowControl

'spatternreplacement/[flags]' Substitute replacement for pattern

next :: SedState FlowControl

n Read next line of input into pattern space.

list :: SedState FlowControl

l List the contents of the pattern space, showing nonprinting characters as ASCII codes

exchange :: SedState FlowControl

x Exchange contents of the pattern space with the contents of the hold space

appendLinePat :: SedState FlowControl

N Append next input line to contents of pattern space

printPat :: SedState FlowControl

p Print the lines

writeUpPat :: SedState FlowControl

P Print first part (up to embedded newline) of multiline pattern space

quit :: SedState FlowControl

q Quit

transform :: ByteString -> ByteString -> SedState FlowControl

'y/abc/xyz' Transform each character by position in string abc to its equivalent in string xyz

writeF :: FilePath -> SedState FlowControl

'w file' Append contents of pattern space to file

readF :: FilePath -> SedState FlowControl

r Read contents of file and append after the contents of the pattern space

printPatSpace :: SedState ()

Skip label, comment and empty command

Print the pattern space to the standard output

isLastLine :: SedState Bool

Check if the current line in the pattern space is the last line

prnStr :: ByteString -> SedState ()

Writes the string to the standard output or save the string in the memory buffer

prnStrLn :: ByteString -> SedState ()

The same as prnStr, but adds a newline character

prnChar :: Char -> SedState ()

The same as prnStr, but for char

prnPrintf :: Char -> SedState ()

Print the character as three-digit octal number