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Code cleanup, unduplicate test for whitespace

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1 parent f5b1153 commit 5860e1e560123698a2ede2b4d93f9e4460dded9c @RaimoNiskanen RaimoNiskanen committed Jul 21, 2011
Showing with 16 additions and 36 deletions.
  1. +16 −36 lib/stdlib/src/io_lib_fread.erl
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52 lib/stdlib/src/io_lib_fread.erl
@@ -24,6 +24,10 @@
-import(lists, [reverse/1,reverse/2]).
+-define(is_whitespace(C),
+ ((C) =:= $\s orelse (C) =:= $\t
+ orelse (C) =:= $\r orelse (C) =:= $\n)).
+
%%-----------------------------------------------------------------------
%% fread(Continuation, CharList, FormatString)
@@ -106,16 +110,10 @@ fread_line(Format0, Line, N0, Results0, More, Newline) ->
fread(Format, Line) ->
fread(Format, Line, 0, []).
-fread([$~|Format0], Line, N, Results) ->
+fread([$~|Format0]=AllFormat, Line, N, Results) ->
{Format,F,Sup,Unicode} = fread_field(Format0),
- fread1(Format, F, Sup, Unicode, Line, N, Results, Format0);
-fread([$\s|Format], Line, N, Results) ->
- fread_skip_white(Format, Line, N, Results);
-fread([$\t|Format], Line, N, Results) ->
- fread_skip_white(Format, Line, N, Results);
-fread([$\r|Format], Line, N, Results) ->
- fread_skip_white(Format, Line, N, Results);
-fread([$\n|Format], Line, N, Results) ->
+ fread1(Format, F, Sup, Unicode, Line, N, Results, AllFormat);
+fread([C|Format], Line, N, Results) when ?is_whitespace(C) ->
fread_skip_white(Format, Line, N, Results);
fread([C|Format], [C|Line], N, Results) ->
fread(Format, Line, N+1, Results);
@@ -132,13 +130,7 @@ fread([_|_], eof, _N, _Results) ->
fread([], Line, _N, Results) ->
{ok,reverse(Results),Line}.
-fread_skip_white(Format, [$\s|Line], N, Results) ->
- fread_skip_white(Format, Line, N+1, Results);
-fread_skip_white(Format, [$\t|Line], N, Results) ->
- fread_skip_white(Format, Line, N+1, Results);
-fread_skip_white(Format, [$\r|Line], N, Results) ->
- fread_skip_white(Format, Line, N+1, Results);
-fread_skip_white(Format, [$\n|Line], N, Results) ->
+fread_skip_white(Format, [C|Line], N, Results) when ?is_whitespace(C) ->
fread_skip_white(Format, Line, N+1, Results);
fread_skip_white(Format, Line, N, Results) ->
fread(Format, Line, N, Results).
@@ -174,7 +166,7 @@ fread1([$l|Format], _F, Sup, _U, Line, N, Res, _AllFormat) ->
fread(Format, Line, N, fread_result(Sup, N, Res));
fread1(_Format, _F, _Sup, _U, [], N, Res, AllFormat) ->
%% Need more input here.
- {more,[$~|AllFormat],N,Res};
+ {more,AllFormat,N,Res};
fread1(_Format, _F, _Sup, _U, eof, 0, [], _AllFormat) ->
%% This is at start of input so no error.
eof;
@@ -394,26 +386,16 @@ fread_string_cs(Line0, N0, true) ->
%% fread_digits(Line, N, Base, Characters)
%% Read segments of things, return "thing" characters in reverse order.
-fread_skip_white([$\s|Line]) -> fread_skip_white(Line);
-fread_skip_white([$\t|Line]) -> fread_skip_white(Line);
-fread_skip_white([$\r|Line]) -> fread_skip_white(Line);
-fread_skip_white([$\n|Line]) -> fread_skip_white(Line);
+fread_skip_white([C|Line]) when ?is_whitespace(C) ->
+ fread_skip_white(Line);
fread_skip_white(Line) -> Line.
-fread_skip_white([$\s|Line], N) ->
- fread_skip_white(Line, N+1);
-fread_skip_white([$\t|Line], N) ->
- fread_skip_white(Line, N+1);
-fread_skip_white([$\r|Line], N) ->
- fread_skip_white(Line, N+1);
-fread_skip_white([$\n|Line], N) ->
+fread_skip_white([C|Line], N) when ?is_whitespace(C) ->
fread_skip_white(Line, N+1);
fread_skip_white(Line, N) -> {Line,N}.
-fread_skip_latin1_nonwhite([$\s|Line], N, Cs) -> {[$\s|Line],N,Cs};
-fread_skip_latin1_nonwhite([$\t|Line], N, Cs) -> {[$\t|Line],N,Cs};
-fread_skip_latin1_nonwhite([$\r|Line], N, Cs) -> {[$\r|Line],N,Cs};
-fread_skip_latin1_nonwhite([$\n|Line], N, Cs) -> {[$\n|Line],N,Cs};
+fread_skip_latin1_nonwhite([C|Line], N, Cs) when ?is_whitespace(C) ->
+ {[C|Line],N,Cs};
fread_skip_latin1_nonwhite([C|Line], N, []) when C > 255 ->
{[C|Line],N,error};
fread_skip_latin1_nonwhite([C|Line], N, Cs) when C > 255 ->
@@ -422,10 +404,8 @@ fread_skip_latin1_nonwhite([C|Line], N, Cs) ->
fread_skip_latin1_nonwhite(Line, N+1, [C|Cs]);
fread_skip_latin1_nonwhite([], N, Cs) -> {[],N,Cs}.
-fread_skip_nonwhite([$\s|Line], N, Cs) -> {[$\s|Line],N,Cs};
-fread_skip_nonwhite([$\t|Line], N, Cs) -> {[$\t|Line],N,Cs};
-fread_skip_nonwhite([$\r|Line], N, Cs) -> {[$\r|Line],N,Cs};
-fread_skip_nonwhite([$\n|Line], N, Cs) -> {[$\n|Line],N,Cs};
+fread_skip_nonwhite([C|Line], N, Cs) when ?is_whitespace(C) ->
+ {[C|Line],N,Cs};
fread_skip_nonwhite([C|Line], N, Cs) ->
fread_skip_nonwhite(Line, N+1, [C|Cs]);
fread_skip_nonwhite([], N, Cs) -> {[],N,Cs}.

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