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-rw-r--r--lib/ic/src/icscan.erl453
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diff --git a/lib/ic/src/icscan.erl b/lib/ic/src/icscan.erl
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-%%
-%% %CopyrightBegin%
-%%
-%% Copyright Ericsson AB 1997-2016. All Rights Reserved.
-%%
-%% Licensed under the Apache License, Version 2.0 (the "License");
-%% you may not use this file except in compliance with the License.
-%% You may obtain a copy of the License at
-%%
-%% http://www.apache.org/licenses/LICENSE-2.0
-%%
-%% Unless required by applicable law or agreed to in writing, software
-%% distributed under the License is distributed on an "AS IS" BASIS,
-%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-%% See the License for the specific language governing permissions 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 2024-11-05 10:01:58 +0000