{- |

Module :$Header$

Copyright : uni-bremen and Razvan Pascanu

Licence : similar to LGPL, see HetCATS/LICENSE.txt or LIZENZ.txt

Maintainer : r.pascanu@iu-bremen.de

Stability : provisional

Portability : portable

Parsing the comand line script.

TODO :

- add comments to the code

- delete the test functions

-}

module PGIP.Command_Parser where

import Syntax.AS_Library

import Syntax.Parse_AS_Library

import Common.AnnoState

import Common.Lexer

import Text.ParserCombinators.Parsec

import PGIP.Parser_Syntax

import PGIP.Commands

import PGIP.Common

-- |the 'getPath' function read a path as a a list of words

getPath::AParser st [String]

getPath

= try ( do v<-scanAnyWords `sepBy1` (string "/")

return v

)

<|>

try ( do skip

v<- scanAnyWords `sepBy1` (string "/")

return v

)

<?>

"path"

-- |the 'getKeyWord' function accepts a string as argument and tries to read it

getKeyWord::String -> AParser st String

getKeyWord wd

= try ( string wd

)

<|>

try ( do skip

string wd

)

<?> ("keyword "++wd)

getGoal::AParser st GOAL

getGoal

= try ( do v1<-libId

getKeyWord "-"

v2<-getNumber

getKeyWord "->"

v3<-libId

return (CountedEdge v1 (read v2::Int) v3)

)

<|>

try ( do v1<-libId

getKeyWord "->"

v2<-libId

return (Edge v1 v2)

)

<|>

try ( do v<-libId

return (Node v)

)

<?>

"goal"

getScript::AParser st String

getScript

= try ( do getKeyWord "end-script"

return ""

)

<|>

try ( do v<-scanAnyWords

vs <-getScript

return (v++" "++vs)

)

<|>

try ( do skip

v<-scanAnyWords

vs<-getScript

return (v++" "++vs)

)

<?>

"some prover script"

getComorphism::AParser st [LIB_ID]

getComorphism

= try ( do v<-libId

getKeyWord ";"

vs <-getComorphism

return ( v:vs)

)

<|>

try ( do v<-libId

return [ v]

)

<?>

" list of ID's separated by semicolon"

scanCommand::[String] -> AParser st [ScriptCommandParameters]

scanCommand arg

= case arg of

[] -> do

string ""

return []

--- scanning a path

"PATH":ls -> do

v <- getPath

vs<- scanCommand ls

return ((Path v):vs)

--- scanning a prover

"PROVER":ls -> do

v <- libId

vs<- scanCommand ls

return ((Prover v):vs)

--- scanning a formula

"FORMULA":ls -> do

v <- libId

vs<- scanCommand ls

return ((Formula v):vs)

--- scanning a comorphism

"COMORPHISM":ls -> do

v <- getComorphism

vs<-scanCommand ls

return ((ParsedComorphism v):vs)

--- scanning goals

"GOALS":ls -> do

v<-many getGoal

vs<- scanCommand ls

return ((Goals v):vs)

--- scanning none or many formulas

"FORMULA-STAR":ls -> do

v<- many ( do tmp<-libId

return tmp

)

vs<-scanCommand ls

return ((Formulas v):vs)

--- scanning one or more formula

"FORMULA-PLUS":ls -> do

v<- many1 ( do tmp<-libId

return tmp

)

vs<-scanCommand ls

return ((Formulas v):vs)

--- scanning proof script

"PROOF-SCRIPT":ls -> do

v<- getScript

vs <-scanCommand ls

return ((ProofScript v):vs)

--- scanning keywords

keyword:ls -> do

getKeyWord keyword

vs<- scanCommand ls

return vs

checkCommand::[([String], CommandFunctionsAndParameters)]->AParser st CommandFunctionsAndParameters

checkCommand arg

= case arg of

(command_description, (CommandParamStatus x _ cmdID)):command_list -> do

try ( do

ls<-scanCommand command_description

try (skip) <|> try (eof)

return (CommandParamStatus x ls cmdID)

)

<|>

checkCommand command_list

(command_description, (CommandParam x _)):command_list -> do

try ( do

ls<-scanCommand command_description

try (skip) <|> try (eof)

return (CommandParam x ls)

)

<|>

checkCommand command_list

(command_description, (CommandStatus x cmdID)):command_list -> do

try ( do

scanCommand command_description

try (skip) <|> try (eof)

return (CommandStatus x cmdID)

)

<|>

checkCommand command_list

(command_description, (CommandTest x _)):command_list -> do

try ( do

ls<-scanCommand command_description

try (skip) <|> try(eof)

return (CommandTest x ls)

)

<|>

checkCommand command_list

(_, CommandError):command_list -> checkCommand command_list

[] -> do

scanAnyWords

return CommandError

parseScript::AParser st [CommandFunctionsAndParameters]

parseScript

= do

ls <-many (checkCommand commands)

try (eof) <|> try ( do skip

eof

)

return ls

runScriptCommands::([CommandFunctionsAndParameters],[CmdInterpreterStatus]) -> IO (Maybe ())

runScriptCommands (arg,status)

= case arg of

[] -> return (Just ())

(CommandParam fn x):ls -> do

val<- fn x

let newStatus= addOrReplace (val,status)

runScriptCommands (ls,newStatus)

(CommandParamStatus fn x cmdID):ls -> do

let tmp = extractFrom (status,cmdID)

case tmp of

Nothing -> return Nothing

Just xx -> do

val <- fn (x,xx)

let newStatus= addOrReplace (val,status)

runScriptCommands (ls,newStatus)

(CommandStatus fn cmdID):ls -> do

let tmp = extractFrom (status,cmdID)

case tmp of

Nothing -> return Nothing

Just xx -> do

let val= fn xx

let newStatus= addOrReplace(val,status)

runScriptCommands (ls, newStatus)

(CommandTest fn x):ls -> do

fn x

runScriptCommands (ls,status)

CommandError:_ -> return Nothing

parseScriptFile:: FilePath-> IO (Maybe())

parseScriptFile fileName

= do

input<- readFile fileName

let r=runParser parseScript (emptyAnnos()) "" input

case r of

Right out-> do

runScriptCommands (out,[])

Left _ ->

return Nothing