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authorHans Bolinder <[email protected]>2013-02-06 12:45:35 +0100
committerHans Bolinder <[email protected]>2013-02-11 15:23:24 +0100
commitb333d6f828b396e8174b3a5d2a6d34f91a872d42 (patch)
tree6e9a50eb167bcbec7391e637ecbcb496b9107a04 /lib/stdlib/src/io_lib_pretty.erl
parent771b21fa519a52a27134806e1d62440d8535f6b5 (diff)
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[stdlib] Fix a bug concerning pretty printing and Unicode
Binaries were pretty printed too often.
Diffstat (limited to 'lib/stdlib/src/io_lib_pretty.erl')
-rw-r--r--lib/stdlib/src/io_lib_pretty.erl68
1 files changed, 37 insertions, 31 deletions
diff --git a/lib/stdlib/src/io_lib_pretty.erl b/lib/stdlib/src/io_lib_pretty.erl
index a8f610558a..b05db3d290 100644
--- a/lib/stdlib/src/io_lib_pretty.erl
+++ b/lib/stdlib/src/io_lib_pretty.erl
@@ -452,18 +452,6 @@ printable_list(L, _D, latin1) ->
io_lib:printable_latin1_list(L);
printable_list(L, _D, _Uni) ->
io_lib:printable_list(L).
-%% Truncated lists could break some existing code.
-% printable_list(L, D, Enc) when D >= 0 ->
-% Len = ?CHARS * (D - 1),
-% case printable_list1(L, Len, Enc) of
-% all ->
-% true;
-% N when is_integer(N), Len - N >= D - 1 ->
-% {L1, _} = lists:split(Len - N, L),
-% {true, L1};
-% N when is_integer(N) ->
-% false
-% end.
printable_bin(Bin, D, Enc) when D >= 0, ?CHARS * D =< byte_size(Bin) ->
printable_bin(Bin, erlang:min(?CHARS * D, byte_size(Bin)), D, Enc);
@@ -473,7 +461,7 @@ printable_bin(Bin, D, Enc) ->
printable_bin(Bin, Len, D, latin1) ->
N = erlang:min(20, Len),
L = binary_to_list(Bin, 1, N),
- case printable_list1(L, N) of
+ case printable_latin1_list(L, N) of
all when N =:= byte_size(Bin) ->
{true, L};
all when N =:= Len -> % N < byte_size(Bin)
@@ -507,7 +495,7 @@ printable_bin1(_Bin, _Start, 0) ->
printable_bin1(Bin, Start, Len) ->
N = erlang:min(10000, Len),
L = binary_to_list(Bin, Start, Start + N - 1),
- case printable_list1(L, N) of
+ case printable_latin1_list(L, N) of
all ->
printable_bin1(Bin, Start + N, Len - N);
NC when is_integer(NC) ->
@@ -515,26 +503,44 @@ printable_bin1(Bin, Start, Len) ->
end.
%% -> all | integer() >=0. Adopted from io_lib.erl.
-% printable_list1([_ | _], 0) -> 0;
-printable_list1([C | Cs], N) when is_integer(C), C >= $\s, C =< $~ ->
- printable_list1(Cs, N - 1);
-printable_list1([C | Cs], N) when is_integer(C), C >= $\240, C =< $\377 ->
- printable_list1(Cs, N - 1);
-printable_list1([$\n | Cs], N) -> printable_list1(Cs, N - 1);
-printable_list1([$\r | Cs], N) -> printable_list1(Cs, N - 1);
-printable_list1([$\t | Cs], N) -> printable_list1(Cs, N - 1);
-printable_list1([$\v | Cs], N) -> printable_list1(Cs, N - 1);
-printable_list1([$\b | Cs], N) -> printable_list1(Cs, N - 1);
-printable_list1([$\f | Cs], N) -> printable_list1(Cs, N - 1);
-printable_list1([$\e | Cs], N) -> printable_list1(Cs, N - 1);
-printable_list1([], _) -> all;
-printable_list1(_, N) -> N.
-
-printable_unicode(<<C/utf8, R/binary>>, I, L) when I > 0 ->
- printable_unicode(R, I - 1, [C | L]);
+% printable_latin1_list([_ | _], 0) -> 0;
+printable_latin1_list([C | Cs], N) when C >= $\s, C =< $~ ->
+ printable_latin1_list(Cs, N - 1);
+printable_latin1_list([C | Cs], N) when C >= $\240, C =< $\377 ->
+ printable_latin1_list(Cs, N - 1);
+printable_latin1_list([$\n | Cs], N) -> printable_latin1_list(Cs, N - 1);
+printable_latin1_list([$\r | Cs], N) -> printable_latin1_list(Cs, N - 1);
+printable_latin1_list([$\t | Cs], N) -> printable_latin1_list(Cs, N - 1);
+printable_latin1_list([$\v | Cs], N) -> printable_latin1_list(Cs, N - 1);
+printable_latin1_list([$\b | Cs], N) -> printable_latin1_list(Cs, N - 1);
+printable_latin1_list([$\f | Cs], N) -> printable_latin1_list(Cs, N - 1);
+printable_latin1_list([$\e | Cs], N) -> printable_latin1_list(Cs, N - 1);
+printable_latin1_list([], _) -> all;
+printable_latin1_list(_, N) -> N.
+
+printable_unicode(<<C/utf8, R/binary>>=Bin, I, L) when I > 0 ->
+ case printable_char(C) of
+ true ->
+ printable_unicode(R, I - 1, [C | L]);
+ false ->
+ {I, Bin, lists:reverse(L)}
+ end;
printable_unicode(Bin, I, L) ->
{I, Bin, lists:reverse(L)}.
+printable_char($\n) -> true;
+printable_char($\r) -> true;
+printable_char($\t) -> true;
+printable_char($\v) -> true;
+printable_char($\b) -> true;
+printable_char($\f) -> true;
+printable_char($\e) -> true;
+printable_char(C) ->
+ C >= $\s andalso C =< $~ orelse
+ C >= 16#A0 andalso C < 16#D800 orelse
+ C > 16#DFFF andalso C < 16#FFFE orelse
+ C > 16#FFFF andalso C =< 16#10FFFF.
+
write_string(S, latin1) ->
io_lib:write_latin1_string(S, $"); %"
write_string(S, _Uni) ->