diff options
Diffstat (limited to 'lib/stdlib/src')
| -rw-r--r-- | lib/stdlib/src/io.erl | 7 | ||||
| -rw-r--r-- | lib/stdlib/src/io_lib.erl | 48 | ||||
| -rw-r--r-- | lib/stdlib/src/io_lib_pretty.erl | 29 |
3 files changed, 56 insertions, 28 deletions
diff --git a/lib/stdlib/src/io.erl b/lib/stdlib/src/io.erl index 3dddb0d6e7..c92e9e3ade 100644 --- a/lib/stdlib/src/io.erl +++ b/lib/stdlib/src/io.erl @@ -32,6 +32,8 @@ parse_erl_exprs/4,parse_erl_form/1,parse_erl_form/2, parse_erl_form/3,parse_erl_form/4]). -export([request/1,request/2,requests/1,requests/2]). +%% Implemented in native code +-export([printable_range/0]). -export_type([device/0, format/0, server_no_data/0]). @@ -66,6 +68,11 @@ o_request(Io, Request, Func) -> Other end. +%% Request what the user considers printable characters +-spec printable_range() -> 'unicode' | 'latin1'. +printable_range() -> + erlang:nif_error(undefined). + %% Put chars takes mixed *unicode* list from R13 onwards. -spec put_chars(CharData) -> 'ok' when CharData :: unicode:chardata(). diff --git a/lib/stdlib/src/io_lib.erl b/lib/stdlib/src/io_lib.erl index b7ec848e1e..ff389cbe22 100644 --- a/lib/stdlib/src/io_lib.erl +++ b/lib/stdlib/src/io_lib.erl @@ -72,7 +72,7 @@ -export([quote_atom/2, char_list/1, latin1_char_list/1, deep_char_list/1, deep_latin1_char_list/1, - printable_list/1, printable_latin1_list/1]). + printable_list/1, printable_latin1_list/1, printable_unicode_list/1]). %% Utilities for collecting characters. -export([collect_chars/3, collect_chars/4, @@ -533,27 +533,45 @@ printable_latin1_list(_) -> false. %Everything else is false %% Return true if CharList is a list of printable characters, else %% false. The notion of printable in Unicode terms is somewhat floating. %% Everything that is not a control character and not invalid unicode -%% will be considered printable. +%% will be considered printable. +%% What the user has noted as printable characters is what actually +%% specifies when this function will return true. If the VM is started +%% with +pc latin1, only the latin1 range will be deemed as printable +%% if on the other hand +pc unicode is given, all characters in the Unicode +%% character set are deemed printable. latin1 is default. -spec printable_list(Term) -> boolean() when Term :: term(). -printable_list([C|Cs]) when is_integer(C), C >= $\040, C =< $\176 -> - printable_list(Cs); -printable_list([C|Cs]) +printable_list(L) -> + %% There will be more alternatives returns from io:printable range + %% in the future. To not have a catch-all caluse is deliberate. + case io:printable_range() of + latin1 -> + printable_latin1_list(L); + unicode -> + printable_unicode_list(L) + end. + +-spec printable_unicode_list(Term) -> boolean() when + Term :: term(). + +printable_unicode_list([C|Cs]) when is_integer(C), C >= $\040, C =< $\176 -> + printable_unicode_list(Cs); +printable_unicode_list([C|Cs]) when is_integer(C), C >= 16#A0, C < 16#D800; is_integer(C), C > 16#DFFF, C < 16#FFFE; is_integer(C), C > 16#FFFF, C =< 16#10FFFF -> - printable_list(Cs); -printable_list([$\n|Cs]) -> printable_list(Cs); -printable_list([$\r|Cs]) -> printable_list(Cs); -printable_list([$\t|Cs]) -> printable_list(Cs); -printable_list([$\v|Cs]) -> printable_list(Cs); -printable_list([$\b|Cs]) -> printable_list(Cs); -printable_list([$\f|Cs]) -> printable_list(Cs); -printable_list([$\e|Cs]) -> printable_list(Cs); -printable_list([]) -> true; -printable_list(_) -> false. %Everything else is false + printable_unicode_list(Cs); +printable_unicode_list([$\n|Cs]) -> printable_unicode_list(Cs); +printable_unicode_list([$\r|Cs]) -> printable_unicode_list(Cs); +printable_unicode_list([$\t|Cs]) -> printable_unicode_list(Cs); +printable_unicode_list([$\v|Cs]) -> printable_unicode_list(Cs); +printable_unicode_list([$\b|Cs]) -> printable_unicode_list(Cs); +printable_unicode_list([$\f|Cs]) -> printable_unicode_list(Cs); +printable_unicode_list([$\e|Cs]) -> printable_unicode_list(Cs); +printable_unicode_list([]) -> true; +printable_unicode_list(_) -> false. %Everything else is false %% List = nl() %% Return a list of characters to generate a newline. diff --git a/lib/stdlib/src/io_lib_pretty.erl b/lib/stdlib/src/io_lib_pretty.erl index 525b534249..4a61b033b0 100644 --- a/lib/stdlib/src/io_lib_pretty.erl +++ b/lib/stdlib/src/io_lib_pretty.erl @@ -485,7 +485,7 @@ printable_bin(Bin, Len, D, latin1) -> false end; printable_bin(Bin, Len, D, _Uni) -> - case printable_unicode(Bin, Len, []) of + case printable_unicode(Bin, Len, [], io:printable_range()) of {_, <<>>, L} -> {byte_size(Bin) =:= length(L), L}; {NC, Bin1, L} when D > 0, Len - NC >= D -> @@ -522,24 +522,27 @@ printable_latin1_list([$\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 +printable_unicode(<<C/utf8, R/binary>>=Bin, I, L, Range) when I > 0 -> + case printable_char(C,Range) of true -> - printable_unicode(R, I - 1, [C | L]); + printable_unicode(R, I - 1, [C | L],Range); false -> {I, Bin, lists:reverse(L)} end; -printable_unicode(Bin, I, L) -> +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($\e) -> true; -printable_char(C) -> +printable_char($\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,latin1) -> + C >= $\s andalso C =< $~ orelse + C >= 16#A0 andalso C =< 16#FF; +printable_char(C,unicode) -> C >= $\s andalso C =< $~ orelse C >= 16#A0 andalso C < 16#D800 orelse C > 16#DFFF andalso C < 16#FFFE orelse |