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Diffstat (limited to 'lib/diameter/src/compiler/diameter_spec_scan.erl')
-rw-r--r-- | lib/diameter/src/compiler/diameter_spec_scan.erl | 157 |
1 files changed, 0 insertions, 157 deletions
diff --git a/lib/diameter/src/compiler/diameter_spec_scan.erl b/lib/diameter/src/compiler/diameter_spec_scan.erl deleted file mode 100644 index bc0448882a..0000000000 --- a/lib/diameter/src/compiler/diameter_spec_scan.erl +++ /dev/null @@ -1,157 +0,0 @@ -%% -%% %CopyrightBegin% -%% -%% Copyright Ericsson AB 2010-2011. 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(diameter_spec_scan). - -%% -%% Functions used by the spec file parser in diameter_spec_util. -%% - --export([split/1, - split/2, - parse/1]). - -%%% ----------------------------------------------------------- -%%% # parse/1 -%%% -%%% Output: list of Token -%%% -%%% Token = '{' | '}' | '<' | '>' | '[' | ']' -%%% | '*' | '::=' | ':' | ',' | '-' -%%% | {name, string()} -%%% | {tag, atom()} -%%% | {number, integer() >= 0} -%%% -%%% Tokenize a string. Fails if the string does not parse. -%%% ----------------------------------------------------------- - -parse(S) -> - parse(S, []). - -%% parse/2 - -parse(S, Acc) -> - acc(split(S), Acc). - -acc({T, Rest}, Acc) -> - parse(Rest, [T | Acc]); -acc("", Acc) -> - lists:reverse(Acc). - -%%% ----------------------------------------------------------- -%%% # split/2 -%%% -%%% Output: {list() of Token, Rest} -%%% -%%% Extract a specified number of tokens from a string. Returns a list -%%% of length less than the specified number if there are less than -%%% this number of tokens to be parsed. -%%% ----------------------------------------------------------- - -split(Str, N) - when N >= 0 -> - split(N, Str, []). - -split(0, Str, Acc) -> - {lists:reverse(Acc), Str}; - -split(N, Str, Acc) -> - case split(Str) of - {T, Rest} -> - split(N-1, Rest, [T|Acc]); - "" = Rest -> - {lists:reverse(Acc), Rest} - end. - -%%% ----------------------------------------------------------- -%%% # split/1 -%%% -%%% Output: {Token, Rest} | "" -%%% -%%% Extract the next token from a string. -%%% ----------------------------------------------------------- - -split("" = Rest) -> - Rest; - -split("::=" ++ T) -> - {'::=', T}; - -split([H|T]) - when H == ${; H == $}; - H == $<; H == $>; - H == $[; H == $]; - H == $*; H == $:; H == $,; H == $- -> - {list_to_atom([H]), T}; - -split([H|T]) when $A =< H, H =< $Z; - $0 =< H, H =< $9 -> - {P, Rest} = splitwith(fun is_name_ch/1, [H], T), - Tok = try - {number, read_int(P)} - catch - error:_ -> - {name, P} - end, - {Tok, Rest}; - -split([H|T]) when $a =< H, H =< $z -> - {P, Rest} = splitwith(fun is_name_ch/1, [H], T), - {{tag, list_to_atom(P)}, Rest}; - -split([H|T]) when H == $\t; - H == $\s; - H == $\n -> - split(T). - -%% read_int/1 - -read_int([$0,X|S]) - when X == $X; - X == $x -> - {ok, [N], []} = io_lib:fread("~16u", S), - N; - -read_int(S) -> - list_to_integer(S). - -%% splitwith/3 - -splitwith(Fun, Acc, S) -> - split([] /= S andalso Fun(hd(S)), Fun, Acc, S). - -split(true, Fun, Acc, [H|T]) -> - splitwith(Fun, [H|Acc], T); -split(false, _, Acc, S) -> - {lists:reverse(Acc), S}. - -is_name_ch(C) -> - is_alphanum(C) orelse C == $- orelse C == $_. - -is_alphanum(C) -> - is_lower(C) orelse is_upper(C) orelse is_digit(C). - -is_lower(C) -> - $a =< C andalso C =< $z. - -is_upper(C) -> - $A =< C andalso C =< $Z. - -is_digit(C) -> - $0 =< C andalso C =< $9. |