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+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 1997-2009. All Rights Reserved.
+%%
+%% The contents of this file are subject to the Erlang Public License,
+%% Version 1.1, (the "License"); you may not use this file except in
+%% compliance with the License. You should have received a copy of the
+%% Erlang Public License along with this software. If not, it can be
+%% retrieved online at http://www.erlang.org/.
+%%
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and limitations
+%% under the License.
+%%
+%% %CopyrightEnd%
+%%
+%%
+-module(icscan).
+
+
+-export([scan/2]).
+
+-include("ic.hrl").
+
+
+%%----------------------------------------------------------------------
+%%----------------------------------------------------------------------
+
+-import(lists, [reverse/1]).
+
+
+scan(G, File) ->
+ PL = call_preproc(G, File),
+ call_scan(G, PL).
+
+call_preproc(G, File) ->
+ case ic_options:get_opt(G, use_preproc) of
+ true ->
+ icpreproc:preproc(G, File);
+ false ->
+ case catch file:read_file(File) of
+ {ok, Bin} ->
+ binary_to_list(Bin);
+ Other ->
+ exit(Other)
+ end
+ end.
+
+call_scan(G, PL) ->
+ BE = ic_options:get_opt(G, be),
+ RSL = scan(G, BE, PL, 1, []),
+ lists:reverse(RSL).
+
+
+%% Guard macros used at top scan functions only
+-define(is_number(X), X >= $0 , X =< $9).
+-define(is_upper(X), X >= $A , X =< $Z).
+-define(is_lower(X), X >= $a, X =< $z).
+-define(is_hex_uc(X), X >= $A , X =< $F).
+-define(is_hex_lc(X), X >= $a , X =< $f).
+-define(is_octal(X), X >=$0, X =< $7).
+
+%% Handle:
+%% const wchar aWChar = L'X';
+scan(G, BE, [$L, $'|Str], Line, Out) ->
+ scan_const(G, BE, wchar, Str, [], Line, Out);
+scan(G, BE, [$L, $"|Str], Line, Out) ->
+ scan_const(G, BE, wstring, Str, [], Line, Out);
+scan(G, BE, [$_, X|Str], Line, Out) when ?is_upper(X) ->
+ scan_name(G, BE, Str, [X], false, Line, Out);
+scan(G, BE, [$_, X|Str], Line, Out) when ?is_lower(X) ->
+ scan_name(G, BE, Str, [X], false, Line, Out);
+scan(G, BE, [X|Str], Line, Out) when ?is_upper(X) ->
+ scan_name(G, BE, Str, [X], true, Line, Out);
+scan(G, BE, [X|Str], Line, Out) when ?is_lower(X) ->
+ scan_name(G, BE, Str, [X], true, Line, Out);
+scan(G, BE, [X|Str], Line, Out) when ?is_number(X) ->
+ scan_number(G, BE, Str, [X], Line, Out);
+scan(G, BE, [9| T], Line, Out) -> scan(G, BE, T, Line, Out);
+scan(G, BE, [32| T], Line, Out) -> scan(G, BE, T, Line, Out);
+scan(G, BE, [$\r|Str], Line, Out) ->
+ scan(G, BE, Str, Line, Out);
+scan(G, BE, [$\n|Str], Line, Out) ->
+ scan(G, BE, Str, Line+1, Out);
+scan(G, BE, [$:, $: | Str], Line, Out) ->
+ scan(G, BE, Str, Line, [{'::', Line} | Out]);
+scan(G, BE, [$/, $/ | Str], Line, Out) ->
+ Rest = skip_to_nl(Str),
+ scan(G, BE, Rest, Line, Out);
+scan(G, BE, [$/, $* | Str], Line, Out) ->
+ Rest = skip_comment(Str),
+ scan(G, BE, Rest, Line, Out);
+scan(G, BE, [$", $\\|Str], Line, Out) ->
+ scan_const(G, BE, string, [$\\|Str], [], Line, Out);
+scan(G, BE, [$"|Str], Line, Out) ->
+ scan_const(G, BE, string, Str, [], Line, Out);
+scan(G, BE, [$', $\\|Str], Line, Out) ->
+ scan_const(G, BE, char, [$\\|Str], [], Line, Out);
+scan(G, BE, [$'|Str], Line, Out) ->
+ scan_const(G, BE, char, Str, [], Line, Out);
+scan(G, BE, [$\\|Str], Line, Out) ->
+ scan_const(G, BE, escaped, [$\\|Str], [], Line, Out);
+scan(G, BE, [$. | Str], Line, Out) ->
+ scan_frac(G, BE, Str, [$.], Line, Out);
+scan(G, BE, [$# | Str], Line, Out) ->
+ scan_preproc(G, BE, Str, Line, Out);
+scan(G, BE, [$<, $< | Str], Line, Out) ->
+ scan(G, BE, Str, Line, [{'<<', Line} | Out]);
+scan(G, BE, [$>, $> | Str], Line, Out) ->
+ scan(G, BE, Str, Line, [{'>>', Line} | Out]);
+scan(G, BE, [C|Str], Line, Out) ->
+ scan(G, BE, Str, Line, [{list_to_atom([C]), Line} | Out]);
+
+scan(_G, _BE, [], _Line, Out) ->
+ Out.
+
+
+scan_number(G, BE, [X|Str], [$0], Line, Out) when X == $X ; X ==$x ->
+ case Str of
+ [D|_TmpStr] when ?is_number(D); ?is_hex_uc(D); ?is_hex_lc(D) ->
+ {Num,Rest} = scan_hex_number(Str,0),
+ scan(G, BE, Rest, Line, [{'<integer_literal>', Line,
+ integer_to_list(Num)} | Out]);
+ [D|TmpStr] ->
+ scan(G, BE, TmpStr, Line, [{list_to_atom([D]), Line} | Out])
+ end;
+scan_number(G, BE, Str, [$0], Line, Out) ->
+ %% If an integer literal starts with a 0 it may indicate that
+ %% it is represented as an octal number. But, it can also be a fixed
+ %% type which must use padding to match a fixed typedef. For example:
+ %% typedef fixed<5,2> fixed52;
+ %% 123.45d, 123.00d and 023.00d is all valid fixed values.
+ %% Naturally, a float can be defined as 0.14 or 00.14.
+ case pre_scan_number(Str, [], octal) of
+ octal ->
+ {Num, Rest} = scan_octal_number(Str,0),
+ scan(G, BE, Rest, Line, [{'<integer_literal>', Line,
+ integer_to_list(Num)} | Out]);
+ {fixed, Fixed, Rest} ->
+ scan(G, BE, Rest, Line, [{'<fixed_pt_literal>', Line, Fixed} | Out]);
+ float ->
+ %% Not very likely that someone defines a constant as 00.14 but ...
+ NewStr = remove_leading_zeroes(Str),
+ scan(G, BE, NewStr, Line, Out)
+ end;
+scan_number(G, BE, [X|Str], Accum, Line, Out) when ?is_number(X) ->
+ scan_number(G, BE, Str, [X|Accum], Line, Out);
+scan_number(G, BE, [X|Str], Accum, Line, Out) when X==$. ->
+ scan_frac(G, BE, Str, [X|Accum], Line, Out);
+scan_number(G, BE, [X|Str], Accum, Line, Out) when X==$e ; X==$e ->
+ scan_exp(G, BE, Str, [X|Accum], Line, Out);
+scan_number(G, BE, [X|Str], Accum, Line, Out) when X==$D ; X==$d ->
+ scan(G, BE, Str, Line, [{'<fixed_pt_literal>', Line,
+ (lists:reverse(Accum))} | Out]);
+scan_number(G, BE, Str, Accum, Line, Out) ->
+ scan(G, BE, Str, Line, [{'<integer_literal>', Line,
+ (lists:reverse(Accum))} | Out]).
+
+
+remove_leading_zeroes([$0|Rest]) ->
+ remove_leading_zeroes(Rest);
+remove_leading_zeroes(L) ->
+ L.
+
+scan_hex_number([X|Rest],Acc) when X >=$a, X =< $f ->
+ scan_hex_number(Rest,(Acc bsl 4) + (X - $a + 10));
+scan_hex_number([X|Rest],Acc) when X >=$A, X =< $F ->
+ scan_hex_number(Rest,(Acc bsl 4) + (X - $A + 10));
+scan_hex_number([X|Rest],Acc) when X >=$0, X =< $9 ->
+ scan_hex_number(Rest,(Acc bsl 4) + (X-$0));
+scan_hex_number(Rest,Acc) ->
+ {Acc,Rest}.
+
+pre_scan_number([$d|Rest], Acc, _) ->
+ {fixed, [$0|lists:reverse(Acc)], Rest};
+pre_scan_number([$D|Rest], Acc, _) ->
+ {fixed, [$0|lists:reverse(Acc)], Rest};
+pre_scan_number([$.|Rest], Acc, _) ->
+ %% Actually, we don't know if it's a float since it can be a fixed.
+ pre_scan_number(Rest, [$.|Acc], float);
+pre_scan_number([X|_], _Acc, _) when X == $E ; X ==$e ->
+ %% Now we now it's a float.
+ float;
+pre_scan_number([X|Rest], Acc, Type) when ?is_number(X) ->
+ pre_scan_number(Rest, [X|Acc], Type);
+pre_scan_number(_Rest, _Acc, Type) ->
+ %% At this point we know it's a octal or float.
+ Type.
+
+scan_octal_number([X|Rest],Acc) when ?is_octal(X) ->
+ scan_octal_number(Rest,(Acc bsl 3) + (X-$0));
+scan_octal_number(Rest,Acc) ->
+ {Acc, Rest}.
+
+%% Floating point number scan.
+%%
+%% Non trivial scan. A float consists of an integral part, a
+%% decimal point, a fraction part, an e or E and a signed integer
+%% exponent. Either the integer part or the fraction part but not
+%% both may be missing, and either the decimal point or the
+%% exponent part but not both may be missing. The exponent part
+%% must consist of an e or E and a possibly signed exponent.
+%%
+%% Analysis shows that "1." ".7" "1e2" ".5e-3" "1.7e2" "1.7e-2"
+%% is allowed and "1" ".e9" is not. The sign is only allowed just
+%% after an e or E. The scanner reads a number as an integer
+%% until it encounters a "." so the integer part only error case
+%% will not be caught in the scanner (but rather in expression
+%% evaluation)
+
+scan_frac(G, _BE, [$e | _Str], [$.], Line, _Out) ->
+ ic_error:fatal_error(G, {illegal_float, Line});
+scan_frac(G, _BE, [$E | _Str], [$.], Line, _Out) ->
+ ic_error:fatal_error(G, {illegal_float, Line});
+scan_frac(G, BE, Str, Accum, Line, Out) ->
+ scan_frac2(G, BE, Str, Accum, Line, Out).
+
+scan_frac2(G, BE, [X|Str], Accum, Line, Out) when ?is_number(X) ->
+ scan_frac2(G, BE, Str, [X|Accum], Line, Out);
+scan_frac2(G, BE, [X|Str], Accum, Line, Out) when X==$e ; X==$E ->
+ scan_exp(G, BE, Str, [X|Accum], Line, Out);
+%% The following case is for fixed (e.g. 123.45d).
+scan_frac2(G, BE, [X|Str], Accum, Line, Out) when X==$d ; X==$D ->
+ scan(G, BE, Str, Line, [{'<fixed_pt_literal>', Line,
+ (lists:reverse(Accum))} | Out]);
+scan_frac2(G, BE, Str, Accum, Line, Out) ->
+ scan(G, BE, Str, Line, [{'<floating_pt_literal>', Line,
+ (lists:reverse(Accum))} | Out]).
+
+scan_exp(G, BE, [X|Str], Accum, Line, Out) when X==$- ->
+ scan_exp2(G, BE, Str, [X|Accum], Line, Out);
+scan_exp(G, BE, Str, Accum, Line, Out) ->
+ scan_exp2(G, BE, Str, Accum, Line, Out).
+
+scan_exp2(G, BE, [X|Str], Accum, Line, Out) when ?is_number(X) ->
+ scan_exp2(G, BE, Str, [X|Accum], Line, Out);
+scan_exp2(G, BE, Str, Accum, Line, Out) ->
+ scan(G, BE, Str, Line, [{'<floating_pt_literal>', Line,
+ (lists:reverse(Accum))} | Out]).
+
+
+scan_name(G, BE, [X|Str], Accum, TypeCheck, Line, Out) when ?is_upper(X) ->
+ scan_name(G, BE, Str, [X|Accum], TypeCheck, Line, Out);
+scan_name(G, BE, [X|Str], Accum, TypeCheck, Line, Out) when ?is_lower(X) ->
+ scan_name(G, BE, Str, [X|Accum], TypeCheck, Line, Out);
+scan_name(G, BE, [X|Str], Accum, TypeCheck, Line, Out) when ?is_number(X) ->
+ scan_name(G, BE, Str, [X|Accum], TypeCheck, Line, Out);
+scan_name(G, BE, [$_|Str], Accum, TypeCheck, Line, Out) ->
+ scan_name(G, BE, Str, [$_|Accum], TypeCheck, Line, Out);
+scan_name(G, BE, S, Accum, false, Line, Out) ->
+ %% The CORBA 2.3 specification allows the user to override typechecking:
+ %% typedef string _native;
+ %% interface i {
+ %% void foo(in _native VT);
+ %% };
+ %% BUT, the IFR-id remains the same ("IDL:native:1.0") etc. The reason for
+ %% this is that one don't have to re-write a large chunk of IDL- and
+ %% application-code.
+ scan(G, BE, S, Line, [{'<identifier>', Line, lists:reverse(Accum)} | Out]);
+scan_name(G, BE, S, Accum, _, Line, Out) ->
+ L = lists:reverse(Accum),
+ X = case is_reserved(L, BE) of
+ undefined ->
+ {'<identifier>', Line, L};
+ Yes ->
+ {Yes, Line}
+ end,
+ scan(G, BE, S, Line, [X | Out]).
+
+%% Shall scan a constant
+scan_const(G, BE, string, [$" | Rest], Accum, Line, [{'<string_literal>', _, Str}|Out]) ->
+ scan(G, BE, Rest, Line,
+ [{'<string_literal>', Line, Str ++ lists:reverse(Accum)} | Out]);
+scan_const(G, BE, string, [$" | Rest], Accum, Line, Out) ->
+ scan(G, BE, Rest, Line,
+ [{'<string_literal>', Line, lists:reverse(Accum)} | Out]);
+scan_const(G, BE, wstring, [$" | Rest], Accum, Line, [{'<wstring_literal>', _,Wstr}|Out]) -> %% WSTRING
+ scan(G, BE, Rest, Line,
+ [{'<wstring_literal>', Line, Wstr ++ lists:reverse(Accum)} | Out]);
+scan_const(G, BE, wstring, [$" | Rest], Accum, Line, Out) -> %% WSTRING
+ scan(G, BE, Rest, Line,
+ [{'<wstring_literal>', Line, lists:reverse(Accum)} | Out]);
+scan_const(G, _BE, string, [], _Accum, Line, Out) -> %% Bad string
+ ic_error:error(G, {bad_string, Line}),
+ Out;
+scan_const(G, _BE, wstring, [], _Accum, Line, Out) -> %% Bad WSTRING
+ ic_error:error(G, {bad_string, Line}),
+ Out;
+scan_const(G, BE, char, [$' | Rest], Accum, Line, Out) ->
+ scan(G, BE, Rest, Line,
+ [{'<character_literal>', Line, lists:reverse(Accum)} | Out]);
+scan_const(G, BE, wchar, [$' | Rest], Accum, Line, Out) -> %% WCHAR
+ scan(G, BE, Rest, Line,
+ [{'<wcharacter_literal>', Line, lists:reverse(Accum)} | Out]);
+scan_const(G, BE, Mode, [$\\, C | Rest], Accum, Line, Out) ->
+ case escaped_char(C) of
+ error ->
+ ic_error:error(G, {bad_escape_character, Line, C}), %% Bad escape character
+ scan_const(G, BE, Mode, Rest, [C | Accum], Line, Out);
+ octal ->
+ {Num,Rest2} = scan_octal_number([C|Rest], 0),
+ scan_const(G, BE, Mode, Rest2, [Num|Accum], Line, Out);
+ hexadecimal ->
+ {Num,Rest2} = scan_hex_number(Rest, 0),
+ if
+ Num > 255 -> %% 16#FF
+ ic_error:error(G, {bad_escape_character, Line, C}),
+ scan_const(G, BE, Mode, Rest, [C | Accum], Line, Out);
+ true ->
+ scan_const(G, BE, Mode, Rest2, [Num|Accum], Line, Out)
+ end;
+ unicode ->
+ {Num,Rest2} = scan_hex_number(Rest, 0),
+ if
+ Num > 65535 -> %% 16#FFFF
+ ic_error:error(G, {bad_escape_character, Line, C}),
+ scan_const(G, BE, Mode, Rest, [C | Accum], Line, Out);
+ true ->
+ scan_const(G, BE, Mode, Rest2, [Num|Accum], Line, Out)
+ end;
+ EC ->
+ scan_const(G, BE, Mode, Rest, [EC | Accum], Line, Out)
+ end;
+scan_const(G, BE, Mode, [C | Rest], Accum, Line, Out) ->
+ scan_const(G, BE, Mode, Rest, [C | Accum], Line, Out).
+
+
+%%
+%% Preprocessor output handling
+%%
+%% gcc outputs a line with line number, file name (within \") and
+%% one or more integer flags. The scanner scans the line number,
+%% the id and all integers up to nl.
+%%
+%% NOTE: This will have to be enhanced in order to eat #pragma
+%%
+scan_preproc(G, BE, Str, Line, Out) ->
+ {List, Rest} = scan_to_nl(strip(Str), []),
+ NewLine = get_new_line_nr(strip(List), Line+1, []),
+ case scan_number(G, BE, List, [], Line, [{'#', Line} | Out]) of
+ L when is_list(L) ->
+ scan(G, BE, Rest, NewLine, [{'#', Line} | L])
+ end.
+
+get_new_line_nr([C|R], Line, Acc) when C>=$0, C=<$9 ->
+ get_new_line_nr(R, Line, [C|Acc]);
+get_new_line_nr(_, Line, []) -> Line; % No line nr found
+get_new_line_nr(_, _, Acc) -> list_to_integer(reverse(Acc)).
+
+scan_to_nl([], Acc) -> {reverse(Acc), []};
+scan_to_nl([$\n|Str], Acc) -> {reverse(Acc), Str};
+scan_to_nl([$\r|R], Acc) -> scan_to_nl(R, Acc);
+scan_to_nl([C|R], Acc) -> scan_to_nl(R, [C|Acc]).
+
+strip([$ |R]) -> strip(R);
+strip(L) -> L.
+
+%% Escaped character. Escaped chars are repr as two characters in the
+%% input list of letters and this is translated into one char.
+escaped_char($n) -> $\n;
+escaped_char($t) -> $\t;
+escaped_char($v) -> $\v;
+escaped_char($b) -> $\b;
+escaped_char($r) -> $ ;
+escaped_char($f) -> $\f;
+escaped_char($a) -> $\a;
+escaped_char($\\) -> $\\;
+escaped_char($?) -> $?;
+escaped_char($') -> $';
+escaped_char($") -> $";
+escaped_char($x) -> hexadecimal;
+escaped_char($u) -> unicode;
+escaped_char(X) when ?is_octal(X) -> octal;
+%% Error
+escaped_char(_Other) -> error.
+
+skip_to_nl([]) -> [];
+skip_to_nl([$\n | Str]) ->[$\n | Str];
+skip_to_nl([_|Str]) ->
+ skip_to_nl(Str).
+
+skip_comment([$\\, _ | Str]) ->
+ skip_comment(Str);
+skip_comment([$*, $/ | Str]) -> Str;
+skip_comment([_|Str]) ->
+ skip_comment(Str).
+
+
+%%----------------------------------------------------------------------
+%% Shall separate keywords from identifiers and numbers
+
+%% Fill in the ets of reserved words
+is_reserved("Object", _) -> 'Object';
+is_reserved("in", _) -> in;
+is_reserved("interface", _) -> interface;
+is_reserved("case", _) -> 'case';
+is_reserved("union", _) -> union;
+is_reserved("struct", _) -> struct;
+is_reserved("any", _) -> any;
+is_reserved("long", _) -> long;
+is_reserved("float", _) -> float;
+is_reserved("out", _) -> out;
+is_reserved("enum", _) -> enum;
+is_reserved("double", _) -> double;
+is_reserved("context", _) -> context;
+is_reserved("oneway", _) -> oneway;
+is_reserved("sequence", _) -> sequence;
+is_reserved("FALSE", _) -> 'FALSE';
+is_reserved("readonly", _) -> readonly;
+is_reserved("char", _) -> char;
+is_reserved("wchar", _) -> wchar;
+is_reserved("void", _) -> void;
+is_reserved("inout", _) -> inout;
+is_reserved("attribute", _) -> attribute;
+is_reserved("octet", _) -> octet;
+is_reserved("TRUE", _) -> 'TRUE';
+is_reserved("switch", _) -> switch;
+is_reserved("unsigned", _) -> unsigned;
+is_reserved("typedef", _) -> typedef;
+is_reserved("const", _) -> const;
+is_reserved("raises", _) -> raises;
+is_reserved("string", _) -> string;
+is_reserved("wstring", _) -> wstring;
+is_reserved("default", _) -> default;
+is_reserved("short", _) -> short;
+is_reserved("module", _) -> module;
+is_reserved("exception", _) -> exception;
+is_reserved("boolean", _) -> boolean;
+%% --- New keywords Introduced in CORBA-2.3.1 ---
+%% For now we cannot add these for all backends right now since it would cause
+%% some problems for at least one customer.
+is_reserved("fixed", BE) -> check_be(BE, fixed);
+%is_reserved("abstract", BE) -> check_be(BE, abstract);
+%is_reserved("custom", BE) -> check_be(BE, custom);
+%is_reserved("factory", BE) -> check_be(BE, factory);
+%is_reserved("local", BE) -> check_be(BE, local);
+%is_reserved("native", BE) -> check_be(BE, native);
+%is_reserved("private", BE) -> check_be(BE, private);
+%is_reserved("public", BE) -> check_be(BE, public);
+%is_reserved("supports", BE) -> check_be(BE, supports);
+%is_reserved("truncatable", BE) -> check_be(BE, truncatable);
+%is_reserved("ValueBase", BE) -> check_be(BE, 'ValueBase');
+%is_reserved("valuetype", BE) -> check_be(BE, valuetype);
+is_reserved(_, _) -> undefined.
+
+check_be(erl_corba, KeyWord) ->
+ KeyWord;
+check_be(_, _) ->
+ undefined.
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-08 04:07:54 +0000