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%% Copyright (c) 2008 Robert Virding. All rights reserved. | ||
%% | ||
%% Redistribution and use in source and binary forms, with or without | ||
%% modification, are permitted provided that the following conditions | ||
%% are met: | ||
%% | ||
%% 1. Redistributions of source code must retain the above copyright | ||
%% notice, this list of conditions and the following disclaimer. | ||
%% 2. Redistributions in binary form must reproduce the above copyright | ||
%% notice, this list of conditions and the following disclaimer in the | ||
%% documentation and/or other materials provided with the distribution. | ||
%% | ||
%% THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | ||
%% "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | ||
%% LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS | ||
%% FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE | ||
%% COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, | ||
%% INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, | ||
%% BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | ||
%% LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER | ||
%% CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | ||
%% LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN | ||
%% ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | ||
%% POSSIBILITY OF SUCH DAMAGE. | ||
|
||
%% File : lfe_scan.xrl | ||
%% Author : Robert Virding | ||
%% Purpose : Token definitions for Lisp Flavoured Erlang. | ||
|
||
Definitions. | ||
B = [01] | ||
O = [0-7] | ||
D = [0-9] | ||
H = [0-9a-fA-F] | ||
U = [A-Z] | ||
L = [a-z] | ||
A = ({U}|{L}) | ||
DEL = [][()}{";\000-\s] | ||
SYM = [^][()}{";\000-\s] | ||
SSYM = [^][()}{";#`',\000-\s] | ||
WS = ([\000-\s]|;[^\n]*) | ||
Rules. | ||
%% Separaters | ||
#[bB]\( : {token,{'#B(',TokenLine}}. | ||
#\( : {token,{'#(',TokenLine}}. | ||
#' : {token,{'#\'',TokenLine}}. | ||
#` : {token,{'#`',TokenLine}}. | ||
#; : {token,{'#;',TokenLine}}. | ||
#, : {token,{'#,',TokenLine}}. | ||
#,@ : {token,{'#,@',TokenLine}}. | ||
' : {token,{'\'',TokenLine}}. | ||
` : {token,{'`',TokenLine}}. | ||
, : {token,{',',TokenLine}}. | ||
,@ : {token,{',@',TokenLine}}. | ||
\. : {token,{'.',TokenLine}}. | ||
[][()}{] : {token,{list_to_atom(TokenChars),TokenLine}}. | ||
%% Characters | ||
#\\(x{H}+|.) : char(string:substr(TokenChars, 3), TokenLine). | ||
%% String | ||
"(\\x{H}+;|\\.|[^"])*" : | ||
%% Strip quotes. | ||
S = string:substr(TokenChars, 2, TokenLen - 2), | ||
{token,{string,TokenLine,chars(S)}}. | ||
%% Symbols | ||
\|(\\x{H}+;|\\.|[^|])*\| : | ||
%% Strip quotes. | ||
S = string:substr(TokenChars, 2, TokenLen - 2), | ||
{token,{symbol,TokenLine,list_to_atom(chars(S))}}. | ||
%% Atoms | ||
{SSYM}{SYM}* : | ||
case catch {ok,list_to_float(TokenChars)} of | ||
{ok,F} -> {token,{number,TokenLine,F}}; | ||
_ -> | ||
case catch {ok,list_to_integer(TokenChars)} of | ||
{ok,I} -> {token,{number,TokenLine,I}}; | ||
_ -> {token,{symbol,TokenLine,list_to_atom(TokenChars)}} | ||
end | ||
end. | ||
{WS}+ : skip_token. | ||
|
||
Erlang code. | ||
%% Copyright (c) 2008 Robert Virding. All rights reserved. | ||
%% | ||
%% Redistribution and use in source and binary forms, with or without | ||
%% modification, are permitted provided that the following conditions | ||
%% are met: | ||
%% | ||
%% 1. Redistributions of source code must retain the above copyright | ||
%% notice, this list of conditions and the following disclaimer. | ||
%% 2. Redistributions in binary form must reproduce the above copyright | ||
%% notice, this list of conditions and the following disclaimer in the | ||
%% documentation and/or other materials provided with the distribution. | ||
%% | ||
%% THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | ||
%% "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | ||
%% LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS | ||
%% FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE | ||
%% COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, | ||
%% INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, | ||
%% BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | ||
%% LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER | ||
%% CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | ||
%% LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN | ||
%% ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | ||
%% POSSIBILITY OF SUCH DAMAGE. | ||
|
||
%% File : lfe_scan.erl | ||
%% Author : Robert Virding | ||
%% Purpose : Token definitions for Lisp Flavoured Erlang. | ||
|
||
-import(string, [substr/2,substr/3]). | ||
|
||
%% base(Chars, Base, Line) -> Integer. | ||
%% Convert a string of Base characters into a number. We know that | ||
%% the strings only contain the correct character. | ||
|
||
base(Cs, B, L) -> | ||
case base1(Cs, B, 0) of | ||
{N,[]} -> {token,{number,L,N}}; | ||
{_,_} -> {error,"illegal based number"} | ||
end. | ||
|
||
base1([C|Cs], Base, SoFar) when C >= $0, C =< $9, C < Base + $0 -> | ||
Next = SoFar * Base + (C - $0), | ||
base1(Cs, Base, Next); | ||
base1([C|Cs], Base, SoFar) when C >= $a, C =< $f, C < Base + $a - 10 -> | ||
Next = SoFar * Base + (C - $a + 10), | ||
base1(Cs, Base, Next); | ||
base1([C|Cs], Base, SoFar) when C >= $A, C =< $F, C < Base + $A - 10 -> | ||
Next = SoFar * Base + (C - $A + 10), | ||
base1(Cs, Base, Next); | ||
base1([C|Cs], _Base, SoFar) -> {SoFar,[C|Cs]}; | ||
base1([], _Base, N) -> {N,[]}. | ||
|
||
%% char(InputChars, Line) -> Char. | ||
%% Convert an input string into the corresponding character. We know | ||
%% that the input string is correct. | ||
|
||
char([$x,C|Cs], L) -> | ||
case base1([C|Cs], 16, 0) of | ||
{N,[]} -> {token,{number,L,N}}; | ||
_ -> {error,"illegal character"} | ||
end; | ||
char([C], L) -> {token,{number,L,C}}. | ||
|
||
%% chars(InputChars) -> Chars. | ||
%% Convert an input string into the corresponding string | ||
%% characters. We know that the input string is correct. | ||
|
||
chars([$\\,$x,C|Cs0]) -> | ||
case hex_char(C) of | ||
true -> | ||
case base1([C|Cs0], 16, 0) of | ||
{N,[$;|Cs1]} -> [N|chars(Cs1)]; | ||
_Other -> [escape_char($x)|chars([C|Cs0])] | ||
end; | ||
false -> [escape_char($x)|chars([C|Cs0])] | ||
end; | ||
chars([$\\,C|Cs]) -> [escape_char(C)|chars(Cs)]; | ||
chars([C|Cs]) -> [C|chars(Cs)]; | ||
chars([]) -> []. | ||
|
||
hex_char(C) when C >= $0, C =< $9 -> true; | ||
hex_char(C) when C >= $a, C =< $f -> true; | ||
hex_char(C) when C >= $A, C =< $F -> true; | ||
hex_char(_) -> false. | ||
|
||
escape_char($n) -> $\n; %\n = LF | ||
escape_char($r) -> $\r; %\r = CR | ||
escape_char($t) -> $\t; %\t = TAB | ||
escape_char($v) -> $\v; %\v = VT | ||
escape_char($b) -> $\b; %\b = BS | ||
escape_char($f) -> $\f; %\f = FF | ||
escape_char($e) -> $\e; %\e = ESC | ||
escape_char($s) -> $\s; %\s = SPC | ||
escape_char($d) -> $\d; %\d = DEL | ||
escape_char(C) -> C. | ||
%% Copyright (c) 2008 Robert Virding. All rights reserved. | ||
%% | ||
%% Redistribution and use in source and binary forms, with or without | ||
%% modification, are permitted provided that the following conditions | ||
%% are met: | ||
%% | ||
%% 1. Redistributions of source code must retain the above copyright | ||
%% notice, this list of conditions and the following disclaimer. | ||
%% 2. Redistributions in binary form must reproduce the above copyright | ||
%% notice, this list of conditions and the following disclaimer in the | ||
%% documentation and/or other materials provided with the distribution. | ||
%% | ||
%% THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | ||
%% "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | ||
%% LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS | ||
%% FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE | ||
%% COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, | ||
%% INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, | ||
%% BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | ||
%% LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER | ||
%% CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | ||
%% LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN | ||
%% ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | ||
%% POSSIBILITY OF SUCH DAMAGE. | ||
|
||
%% File : lfe_scan.xrl | ||
%% Author : Robert Virding | ||
%% Purpose : Token definitions for Lisp Flavoured Erlang. | ||
|
||
Definitions. | ||
B = [01] | ||
O = [0-7] | ||
D = [0-9] | ||
H = [0-9a-fA-F] | ||
U = [A-Z] | ||
L = [a-z] | ||
A = ({U}|{L}) | ||
DEL = [][()}{";\000-\s] | ||
SYM = [^][()}{";\000-\s] | ||
SSYM = [^][()}{";#`',\000-\s] | ||
WS = ([\000-\s]|;[^\n]*) | ||
Rules. | ||
%% Separaters | ||
#[bB]\( : {token,{'#B(',TokenLine}}. | ||
#\( : {token,{'#(',TokenLine}}. | ||
#' : {token,{'#\'',TokenLine}}. | ||
#` : {token,{'#`',TokenLine}}. | ||
#; : {token,{'#;',TokenLine}}. | ||
#, : {token,{'#,',TokenLine}}. | ||
#,@ : {token,{'#,@',TokenLine}}. | ||
' : {token,{'\'',TokenLine}}. | ||
` : {token,{'`',TokenLine}}. | ||
, : {token,{',',TokenLine}}. | ||
,@ : {token,{',@',TokenLine}}. | ||
\. : {token,{'.',TokenLine}}. | ||
[][()}{] : {token,{list_to_atom(TokenChars),TokenLine}}. | ||
%% Characters | ||
#\\(x{H}+|.) : char(string:substr(TokenChars, 3), TokenLine). | ||
%% String | ||
"(\\x{H}+;|\\.|[^"])*" : | ||
%% Strip quotes. | ||
S = string:substr(TokenChars, 2, TokenLen - 2), | ||
{token,{string,TokenLine,chars(S)}}. | ||
%% Symbols | ||
\|(\\x{H}+;|\\.|[^|])*\| : | ||
%% Strip quotes. | ||
S = string:substr(TokenChars, 2, TokenLen - 2), | ||
{token,{symbol,TokenLine,list_to_atom(chars(S))}}. | ||
%% Atoms | ||
{SSYM}{SYM}* : | ||
case catch {ok,list_to_float(TokenChars)} of | ||
{ok,F} -> {token,{number,TokenLine,F}}; | ||
_ -> | ||
case catch {ok,list_to_integer(TokenChars)} of | ||
{ok,I} -> {token,{number,TokenLine,I}}; | ||
_ -> {token,{symbol,TokenLine,list_to_atom(TokenChars)}} | ||
end | ||
end. | ||
{WS}+ : skip_token. | ||
|
||
Erlang code. | ||
%% Copyright (c) 2008 Robert Virding. All rights reserved. | ||
%% | ||
%% Redistribution and use in source and binary forms, with or without | ||
%% modification, are permitted provided that the following conditions | ||
%% are met: | ||
%% | ||
%% 1. Redistributions of source code must retain the above copyright | ||
%% notice, this list of conditions and the following disclaimer. | ||
%% 2. Redistributions in binary form must reproduce the above copyright | ||
%% notice, this list of conditions and the following disclaimer in the | ||
%% documentation and/or other materials provided with the distribution. | ||
%% | ||
%% THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | ||
%% "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | ||
%% LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS | ||
%% FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE | ||
%% COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, | ||
%% INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, | ||
%% BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | ||
%% LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER | ||
%% CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | ||
%% LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN | ||
%% ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | ||
%% POSSIBILITY OF SUCH DAMAGE. | ||
|
||
%% File : lfe_scan.erl | ||
%% Author : Robert Virding | ||
%% Purpose : Token definitions for Lisp Flavoured Erlang. | ||
|
||
-import(string, [substr/2,substr/3]). | ||
|
||
%% base(Chars, Base, Line) -> Integer. | ||
%% Convert a string of Base characters into a number. We know that | ||
%% the strings only contain the correct character. | ||
|
||
base(Cs, B, L) -> | ||
case base1(Cs, B, 0) of | ||
{N,[]} -> {token,{number,L,N}}; | ||
{_,_} -> {error,"illegal based number"} | ||
end. | ||
|
||
base1([C|Cs], Base, SoFar) when C >= $0, C =< $9, C < Base + $0 -> | ||
Next = SoFar * Base + (C - $0), | ||
base1(Cs, Base, Next); | ||
base1([C|Cs], Base, SoFar) when C >= $a, C =< $f, C < Base + $a - 10 -> | ||
Next = SoFar * Base + (C - $a + 10), | ||
base1(Cs, Base, Next); | ||
base1([C|Cs], Base, SoFar) when C >= $A, C =< $F, C < Base + $A - 10 -> | ||
Next = SoFar * Base + (C - $A + 10), | ||
base1(Cs, Base, Next); | ||
base1([C|Cs], _Base, SoFar) -> {SoFar,[C|Cs]}; | ||
base1([], _Base, N) -> {N,[]}. | ||
|
||
%% char(InputChars, Line) -> Char. | ||
%% Convert an input string into the corresponding character. We know | ||
%% that the input string is correct. | ||
|
||
char([$x,C|Cs], L) -> | ||
case base1([C|Cs], 16, 0) of | ||
{N,[]} -> {token,{number,L,N}}; | ||
_ -> {error,"illegal character"} | ||
end; | ||
char([C], L) -> {token,{number,L,C}}. | ||
|
||
%% chars(InputChars) -> Chars. | ||
%% Convert an input string into the corresponding string | ||
%% characters. We know that the input string is correct. | ||
|
||
chars([$\\,$x,C|Cs0]) -> | ||
case hex_char(C) of | ||
true -> | ||
case base1([C|Cs0], 16, 0) of | ||
{N,[$;|Cs1]} -> [N|chars(Cs1)]; | ||
_Other -> [escape_char($x)|chars([C|Cs0])] | ||
end; | ||
false -> [escape_char($x)|chars([C|Cs0])] | ||
end; | ||
chars([$\\,C|Cs]) -> [escape_char(C)|chars(Cs)]; | ||
chars([C|Cs]) -> [C|chars(Cs)]; | ||
chars([]) -> []. | ||
|
||
hex_char(C) when C >= $0, C =< $9 -> true; | ||
hex_char(C) when C >= $a, C =< $f -> true; | ||
hex_char(C) when C >= $A, C =< $F -> true; | ||
hex_char(_) -> false. | ||
|
||
escape_char($n) -> $\n; %\n = LF | ||
escape_char($r) -> $\r; %\r = CR | ||
escape_char($t) -> $\t; %\t = TAB | ||
escape_char($v) -> $\v; %\v = VT | ||
escape_char($b) -> $\b; %\b = BS | ||
escape_char($f) -> $\f; %\f = FF | ||
escape_char($e) -> $\e; %\e = ESC | ||
escape_char($s) -> $\s; %\s = SPC | ||
escape_char($d) -> $\d; %\d = DEL | ||
escape_char(C) -> C. |