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|
%% THIS IS A PRE-RELEASE OF LEEX - RELEASED ONLY BECAUSE MANY PEOPLE
%% WANTED IT - THE OFFICIAL RELEASE WILL PROVIDE A DIFFERENT INCOMPATIBLE
%% AND BETTER INTERFACE - BE WARNED
%% PLEASE REPORT ALL BUGS TO THE AUTHOR.
-module('em_test_scan').
-export([string/1,string/2,token/2,token/3,tokens/2,tokens/3]).
-export([format_error/1]).
%% luke
-export([yystate/0, yystate/6, yyaction/4]).
%% User code. This is placed here to allow extra attributes.
format_error({illegal,S}) -> ["illegal characters ",io_lib:write_string(S)];
format_error({user,S}) -> S.
string(String) -> string(String, 1).
string(String, Line) -> string(String, Line, String, []).
%% string(InChars, Line, TokenChars, Tokens) ->
%% {ok,Tokens,Line} | {error,ErrorInfo,Line}.
string([], L, [], Ts) -> %No partial tokens!
{ok,yyrev(Ts),L};
string(Ics0, L0, Tcs, Ts) ->
case yystate(yystate(), Ics0, L0, 0, reject, 0) of
{A,Alen,Ics1,L1} -> %Accepting end state
string_cont(Ics1, L1, yyaction(A, Alen, Tcs, L1), Ts);
{A,Alen,Ics1,L1,S1} -> %After an accepting state
string_cont(Ics1, L1, yyaction(A, Alen, Tcs, L1), Ts);
{reject,Alen,Tlen,Ics1,L1,S1} ->
{error,{L1,?MODULE,{illegal,yypre(Tcs, Tlen+1)}},L1};
{A,Alen,Tlen,Ics1,L1,S1} ->
string_cont(yysuf(Tcs, Alen), L1, yyaction(A, Alen, Tcs, L1), Ts)
end.
%% string_cont(RestChars, Line, Token, Tokens)
%% Test for and remove the end token wrapper.
string_cont(Rest, Line, {token,T}, Ts) ->
string(Rest, Line, Rest, [T|Ts]);
string_cont(Rest, Line, {end_token,T}, Ts) ->
string(Rest, Line, Rest, [T|Ts]);
string_cont(Rest, Line, skip_token, Ts) ->
string(Rest, Line, Rest, Ts);
string_cont(Rest, Line, {error,S}, Ts) ->
{error,{Line,?MODULE,{user,S}},Line}.
%% token(Continuation, Chars, Line) ->
%% {more,Continuation} | {done,ReturnVal,RestChars}.
%% Must be careful when re-entering to append the latest characters to the
%% after characters in an accept.
token(Cont, Chars) -> token(Cont, Chars, 1).
token([], Chars, Line) ->
token(Chars, Line, yystate(), Chars, 0, reject, 0);
token({Line,State,Tcs,Tlen,Action,Alen}, Chars, _) ->
token(Chars, Line, State, Tcs ++ Chars, Tlen, Action, Alen).
%% token(InChars, Line, State, TokenChars, TokenLen, Accept) ->
%% {more,Continuation} | {done,ReturnVal,RestChars}.
token(Ics0, L0, S0, Tcs, Tlen0, A0, Alen0) ->
case yystate(S0, Ics0, L0, Tlen0, A0, Alen0) of
{A1,Alen1,Ics1,L1} -> %Accepting end state
token_cont(Ics1, L1, yyaction(A1, Alen1, Tcs, L1));
{A1,Alen1,[],L1,S1} -> %After an accepting state
{more,{L1,S1,Tcs,Alen1,A1,Alen1}};
{A1,Alen1,Ics1,L1,S1} ->
token_cont(Ics1, L1, yyaction(A1, Alen1, Tcs, L1));
{A1,Alen1,Tlen1,[],L1,S1} -> %After a non-accepting state
{more,{L1,S1,Tcs,Tlen1,A1,Alen1}};
{reject,Alen1,Tlen1,eof,L1,S1} ->
{done,{eof,L1},[]};
{reject,Alen1,Tlen1,Ics1,L1,S1} ->
{done,{error,{L1,?MODULE,{illegal,yypre(Tcs, Tlen1+1)}},L1},Ics1};
{A1,Alen1,Tlen1,Ics1,L1,S1} ->
token_cont(yysuf(Tcs, Alen1), L1, yyaction(A1, Alen1, Tcs, L1))
end.
%% tokens_cont(RestChars, Line, Token)
%% Test if we have detected the end token, if so return done else continue.
token_cont(Rest, Line, {token,T}) ->
{done,{ok,T,Line},Rest};
token_cont(Rest, Line, {end_token,T}) ->
{done,{ok,T,Line},Rest};
token_cont(Rest, Line, skip_token) ->
token(Rest, Line, yystate(), Rest, 0, reject, 0);
token_cont(Rest, Line, {error,S}) ->
{done,{error,{Line,?MODULE,{user,S}},Line},Rest}.
%% tokens(Continuation, Chars, Line) ->
%% {more,Continuation} | {done,ReturnVal,RestChars}.
%% Must be careful when re-entering to append the latest characters to the
%% after characters in an accept.
tokens(Cont, Chars) -> tokens(Cont, Chars, 1).
tokens([], Chars, Line) ->
tokens(Chars, Line, yystate(), Chars, 0, [], reject, 0);
tokens({tokens,Line,State,Tcs,Tlen,Ts,Action,Alen}, Chars, _) ->
tokens(Chars, Line, State, Tcs ++ Chars, Tlen, Ts, Action, Alen);
tokens({skip_tokens,Line,State,Tcs,Tlen,Error,Action,Alen}, Chars, _) ->
skip_tokens(Chars, Line, State, Tcs ++ Chars, Tlen, Error, Action, Alen).
%% tokens(InChars, Line, State, TokenChars, TokenLen, Tokens, Accept) ->
%% {more,Continuation} | {done,ReturnVal,RestChars}.
tokens(Ics0, L0, S0, Tcs, Tlen0, Ts, A0, Alen0) ->
case yystate(S0, Ics0, L0, Tlen0, A0, Alen0) of
{A1,Alen1,Ics1,L1} -> %Accepting end state
tokens_cont(Ics1, L1, yyaction(A1, Alen1, Tcs, L1), Ts);
{A1,Alen1,[],L1,S1} -> %After an accepting state
{more,{tokens,L1,S1,Tcs,Alen1,Ts,A1,Alen1}};
{A1,Alen1,Ics1,L1,S1} ->
tokens_cont(Ics1, L1, yyaction(A1, Alen1, Tcs, L1), Ts);
{A1,Alen1,Tlen1,[],L1,S1} -> %After a non-accepting state
{more,{tokens,L1,S1,Tcs,Tlen1,Ts,A1,Alen1}};
{reject,Alen1,Tlen1,eof,L1,S1} ->
{done,if Ts == [] -> {eof,L1};
true -> {ok,yyrev(Ts),L1} end,[]};
{reject,Alen1,Tlen1,Ics1,L1,S1} ->
skip_tokens(yysuf(Tcs, Tlen1+1), L1,
{L1,?MODULE,{illegal,yypre(Tcs, Tlen1+1)}});
{A1,Alen1,Tlen1,Ics1,L1,S1} ->
tokens_cont(yysuf(Tcs, Alen1), L1, yyaction(A1, Alen1, Tcs, L1), Ts)
end.
%% tokens_cont(RestChars, Line, Token, Tokens)
%% Test if we have detected the end token, if so return done else continue.
tokens_cont(Rest, Line, {token,T}, Ts) ->
tokens(Rest, Line, yystate(), Rest, 0, [T|Ts], reject, 0);
tokens_cont(Rest, Line, {end_token,T}, Ts) ->
{done,{ok,yyrev(Ts, [T]),Line},Rest};
tokens_cont(Rest, Line, skip_token, Ts) ->
tokens(Rest, Line, yystate(), Rest, 0, Ts, reject, 0);
tokens_cont(Rest, Line, {error,S}, Ts) ->
skip_tokens(Rest, Line, {Line,?MODULE,{user,S}}).
%% token_skip(InChars, Line, Error) -> {done,ReturnVal,RestChars}.
%% Skip tokens until an end token, junk everything and return the error.
%%skip_tokens(Ics, Line, Error) -> {done,{error,Error,Line},Ics}.
skip_tokens(Ics, Line, Error) ->
skip_tokens(Ics, Line, yystate(), Ics, 0, Error, reject, 0).
%% skip_tokens(InChars, Line, State, TokenChars, TokenLen, Tokens, Accept) ->
%% {more,Continuation} | {done,ReturnVal,RestChars}.
skip_tokens(Ics0, L0, S0, Tcs, Tlen0, Error, A0, Alen0) ->
case yystate(S0, Ics0, L0, Tlen0, A0, Alen0) of
{A1,Alen1,Ics1,L1} -> %Accepting end state
skip_cont(Ics1, L1, yyaction(A1, Alen1, Tcs, L1), Error);
{A1,Alen1,[],L1,S1} -> %After an accepting state
{more,{skip_tokens,L1,S1,Tcs,Alen1,Error,A1,Alen1}};
{A1,Alen1,Ics1,L1,S1} ->
skip_cont(Ics1, L1, yyaction(A1, Alen1, Tcs, L1), Error);
{A1,Alen1,Tlen1,[],L1,S1} -> %After a non-accepting state
{more,{skip_tokens,L1,S1,Tcs,Tlen1,Error,A1,Alen1}};
{reject,Alen1,Tlen1,eof,L1,S1} ->
{done,{error,Error,L1},[]};
{reject,Alen1,Tlen1,Ics1,L1,S1} ->
skip_tokens(yysuf(Tcs, Tlen1), L1, Error);
{A1,Alen1,Tlen1,Ics1,L1,S1} ->
skip_cont(yysuf(Tcs, Alen1), L1, yyaction(A1, Alen1, Tcs, L1), Error)
end.
%% skip_cont(RestChars, Line, Token, Error)
%% Test if we have detected the end token, if so return done else continue.
skip_cont(Rest, Line, {token,T}, Error) ->
skip_tokens(Rest, Line, yystate(), Rest, 0, Error, reject, 0);
skip_cont(Rest, Line, {end_token,T}, Error) ->
{done,{error,Error,Line},Rest};
skip_cont(Rest, Line, {error,S}, Error) ->
skip_tokens(Rest, Line, yystate(), Rest, 0, Error, reject, 0);
skip_cont(Rest, Line, skip_token, Error) ->
skip_tokens(Rest, Line, yystate(), Rest, 0, Error, reject, 0).
yyrev(L) -> yyrev(L, []).
yyrev([H|T], Acc) -> yyrev(T, [H|Acc]);
yyrev([], Acc) -> Acc.
yypre([H|T], N) when N > 0 -> [H|yypre(T, N-1)];
yypre(L, N) -> [].
yysuf([H|T], N) when N > 0 -> yysuf(T, N-1);
yysuf(L, 0) -> L.
yysplit(L, N) -> yysplit(L, N, []).
yysplit([H|T], N, Acc) when N > 0 -> yysplit(T, N-1, [H|Acc]);
yysplit(L, 0, Acc) -> {lists:reverse(Acc), L}.
%% yystate() -> InitialState.
%% yystate(State, InChars, Line, Token, ) ->
%% {Action, AcceptLength, RestChars, Line} | Accepting end state
%% {Action, AcceptLength, RestChars, Line, State} | Accepting state
%% {Action, AcceptLength, TokLength, RestChars, Line, State} |
%% {reject, AcceptLength, TokLength, RestChars, Line, State}.
%% Generated state transition functions.
yystate() -> 2.
yystate(5, [$+|Ics], Line, Tlen, Action, Alen) ->
yystate(3, Ics, Line, Tlen+1, 0, Tlen);
yystate(5, Ics, Line, Tlen, Action, Alen) ->
{0,Tlen,Ics,Line,5};
yystate(4, [C|Ics], Line, Tlen, Action, Alen) when C >= $a, C =< $z ->
yystate(4, Ics, Line, Tlen+1, 4, Tlen);
yystate(4, Ics, Line, Tlen, Action, Alen) ->
{4,Tlen,Ics,Line,4};
yystate(3, Ics, Line, Tlen, Action, Alen) ->
{1,Tlen,Ics,Line};
yystate(2, [$\s|Ics], Line, Tlen, Action, Alen) ->
yystate(1, Ics, Line, Tlen+1, Action, Alen);
yystate(2, [$+|Ics], Line, Tlen, Action, Alen) ->
yystate(5, Ics, Line, Tlen+1, Action, Alen);
yystate(2, [$-|Ics], Line, Tlen, Action, Alen) ->
yystate(0, Ics, Line, Tlen+1, Action, Alen);
yystate(2, [C|Ics], Line, Tlen, Action, Alen) when C >= $a, C =< $z ->
yystate(4, Ics, Line, Tlen+1, Action, Alen);
yystate(2, Ics, Line, Tlen, Action, Alen) ->
{Action,Alen,Tlen,Ics,Line,2};
yystate(1, Ics, Line, Tlen, Action, Alen) ->
{3,Tlen,Ics,Line};
yystate(0, Ics, Line, Tlen, Action, Alen) ->
{2,Tlen,Ics,Line};
yystate(S, Ics, Line, Tlen, Action, Alen) ->
{Action,Alen,Tlen,Ics,Line,S}.
%% yyaction(Action, TokenLength, TokenChars, Line) ->
%% {token,Token} | {end_token, Token} | skip_token | {error,String}.
%% Generated action function.
yyaction(0, YYlen, YYtcs, YYline) ->
{token,{'+',YYline}};
yyaction(1, YYlen, YYtcs, YYline) ->
{token,{'++',YYline}};
yyaction(2, YYlen, YYtcs, YYline) ->
{token,{'-',YYline}};
yyaction(3, YYlen, YYtcs, YYline) ->
skip_token;
yyaction(4, YYlen, YYtcs, YYline) ->
YYtext = yypre(YYtcs, YYlen),
{token,{atom,YYline,YYtext}};
yyaction(_, _, _, _) -> error.
|
