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-rw-r--r--lib/stdlib/src/io_lib.erl113
1 files changed, 88 insertions, 25 deletions
diff --git a/lib/stdlib/src/io_lib.erl b/lib/stdlib/src/io_lib.erl
index 513d904c39..44c1d2132a 100644
--- a/lib/stdlib/src/io_lib.erl
+++ b/lib/stdlib/src/io_lib.erl
@@ -62,9 +62,12 @@
-export([fwrite/2,fread/2,fread/3,format/2]).
-export([print/1,print/4,indentation/2]).
--export([write/1,write/2,write/3,nl/0,format_prompt/1]).
+-export([write/1,write/2,write/3,nl/0,format_prompt/1,format_prompt/2]).
-export([write_atom/1,write_string/1,write_string/2,write_unicode_string/1,
- write_unicode_string/2, write_char/1, write_unicode_char/1]).
+ write_unicode_string/2, write_char/1, write_unicode_char/1]).
+
+-export([write_unicode_string_as_latin1/1, write_unicode_string_as_latin1/2,
+ write_unicode_char_as_latin1/1]).
-export([quote_atom/2, char_list/1, unicode_char_list/1,
deep_char_list/1, deep_unicode_char_list/1,
@@ -75,11 +78,14 @@
collect_line/2, collect_line/3, collect_line/4,
get_until/3, get_until/4]).
--export_type([chars/0, continuation/0]).
+-export_type([chars/0, unicode_chars/0, unicode_string/0, continuation/0,
+ fread_error/0]).
%%----------------------------------------------------------------------
-type chars() :: [char() | chars()].
+-type unicode_chars() :: [unicode:unicode_char() | unicode_chars()].
+-type unicode_string() :: [unicode:unicode_char()].
-type depth() :: -1 | non_neg_integer().
-opaque continuation() :: {Format :: string(),
@@ -87,6 +93,16 @@
Nchars :: non_neg_integer(),
Results :: [term()]}.
+-type fread_error() :: 'atom'
+ | 'based'
+ | 'character'
+ | 'float'
+ | 'format'
+ | 'input'
+ | 'integer'
+ | 'string'
+ | 'unsigned'.
+
%%----------------------------------------------------------------------
%% Interface calls to sub-modules.
@@ -107,7 +123,7 @@ fwrite(Format, Args) ->
| {'more', RestFormat :: string(),
Nchars :: non_neg_integer(),
InputStack :: chars()}
- | {'error', What :: term()}.
+ | {'error', What :: fread_error()}.
fread(Chars, Format) ->
io_lib_fread:fread(Chars, Format).
@@ -120,7 +136,7 @@ fread(Chars, Format) ->
| {'done', Result, LeftOverChars :: string()},
Result :: {'ok', InputList :: [term()]}
| 'eof'
- | {'error', What :: term()}.
+ | {'error', What :: fread_error()}.
fread(Cont, Chars, Format) ->
io_lib_fread:fread(Cont, Chars, Format).
@@ -162,27 +178,34 @@ indentation(Chars, Current) ->
%% Format an IO-request prompt (handles formatting errors safely).
-%% Atoms, binaries, and iolists can be used as-is, and will be
-%% printed without any additional quotes.
-%% Note that the output is a deep string, and not an iolist (i.e.,
-%% it may be deep, but never contains binaries, due to the "~s").
+%% Atoms, binaries, and iolists (or unicode:charlist()) can be used
+%% as-is, and will be printed without any additional quotes.
-spec format_prompt(term()) -> chars().
-format_prompt({format,Format,Args}) ->
- format_prompt(Format,Args);
-format_prompt(Prompt)
- when is_list(Prompt); is_atom(Prompt); is_binary(Prompt) ->
- format_prompt("~ts", [Prompt]);
format_prompt(Prompt) ->
- format_prompt("~tp", [Prompt]).
+ format_prompt(Prompt, latin1).
+
+-spec format_prompt(term(), atom()) -> chars().
+
+format_prompt({format,Format,Args}, _Encoding) ->
+ do_format_prompt(Format, Args);
+format_prompt(Prompt, Encoding)
+ when is_list(Prompt); is_atom(Prompt); is_binary(Prompt) ->
+ do_format_prompt(add_modifier(Encoding, "s"), [Prompt]);
+format_prompt(Prompt, Encoding) ->
+ do_format_prompt(add_modifier(Encoding, "p"), [Prompt]).
-format_prompt(Format, Args) ->
+do_format_prompt(Format, Args) ->
case catch io_lib:format(Format, Args) of
{'EXIT',_} -> "???";
List -> List
end.
+add_modifier(latin1, C) ->
+ "~"++C;
+add_modifier(_, C) ->
+ "~t"++C.
%% write(Term)
%% write(Term, Depth)
@@ -330,11 +353,32 @@ write_string(S) ->
write_string(S, Q) ->
[Q|write_string1(latin1, S, Q)].
+%%% There are two functions to write Unicode strings:
+%%% - they both escape control characters < 160;
+%%% - write_unicode_string() never escapes characters >= 160;
+%%% - write_unicode_string_as_latin1() also escapes characters >= 255.
+
+-spec write_unicode_string(UnicodeString) -> unicode_string() when
+ UnicodeString :: unicode_string().
+
write_unicode_string(S) ->
write_unicode_string(S, $"). %"
+-spec write_unicode_string(unicode_string(), char()) -> unicode_string().
+
write_unicode_string(S, Q) ->
- [Q|write_string1(unicode, S, Q)].
+ [Q|write_string1(unicode_as_unicode, S, Q)].
+
+-spec write_unicode_string_as_latin1(UnicodeString) -> string() when
+ UnicodeString :: unicode_string().
+
+write_unicode_string_as_latin1(S) ->
+ write_unicode_string_as_latin1(S, $"). %"
+
+-spec write_unicode_string_as_latin1(unicode_string(), char()) -> string().
+
+write_unicode_string_as_latin1(S, Q) ->
+ [Q|write_string1(unicode_as_latin1, S, Q)].
write_string1(_,[], Q) ->
[Q];
@@ -347,7 +391,11 @@ string_char(_,C, _, Tail) when C >= $\s, C =< $~ ->
[C|Tail];
string_char(latin1,C, _, Tail) when C >= $\240, C =< $\377 ->
[C|Tail];
-string_char(unicode,C, _, Tail) when C >= $\240 ->
+string_char(unicode_as_unicode,C, _, Tail) when C >= $\240 ->
+ [C|Tail];
+string_char(unicode_as_latin1,C, _, Tail) when C >= $\240, C =< $\377 ->
+ [C|Tail];
+string_char(unicode_as_latin1,C, _, Tail) when C >= $\377 ->
"\\x{"++erlang:integer_to_list(C, 16)++"}"++Tail;
string_char(_,$\n, _, Tail) -> [$\\,$n|Tail]; %\n = LF
string_char(_,$\r, _, Tail) -> [$\\,$r|Tail]; %\r = CR
@@ -374,10 +422,22 @@ write_char($\s) -> "$\\s"; %Must special case this.
write_char(C) when is_integer(C), C >= $\000, C =< $\377 ->
[$$|string_char(latin1,C, -1, [])].
-write_unicode_char(Ch) when Ch =< 255 ->
- write_char(Ch);
-write_unicode_char(Uni) ->
- [$$|string_char(unicode,Uni, -1, [])].
+%%% There are two functions to write a Unicode character:
+%%% - they both escape control characters < 160;
+%%% - write_unicode_char() never escapes characters >= 160;
+%%% - write_unicode_char_as_latin1() also escapes characters >= 255.
+
+-spec write_unicode_char(UnicodeChar) -> unicode_string() when
+ UnicodeChar :: unicode:unicode_char().
+
+write_unicode_char(Uni) when is_integer(Uni), Uni >= $\000 ->
+ [$$|string_char(unicode_as_unicode,Uni, -1, [])].
+
+-spec write_unicode_char_as_latin1(UnicodeChar) -> string() when
+ UnicodeChar :: unicode:unicode_char().
+
+write_unicode_char_as_latin1(Uni) when is_integer(Uni), Uni >= $\000 ->
+ [$$|string_char(unicode_as_latin1,Uni, -1, [])].
%% char_list(CharList)
%% deep_char_list(CharList)
@@ -392,7 +452,8 @@ char_list([C|Cs]) when is_integer(C), C >= $\000, C =< $\377 ->
char_list([]) -> true;
char_list(_) -> false. %Everything else is false
--spec unicode_char_list(term()) -> boolean().
+-spec unicode_char_list(Term) -> boolean() when
+ Term :: term().
unicode_char_list([C|Cs]) when is_integer(C), C >= 0, C < 16#D800;
is_integer(C), C > 16#DFFF, C < 16#FFFE;
@@ -417,7 +478,8 @@ deep_char_list([], []) -> true;
deep_char_list(_, _More) -> %Everything else is false
false.
--spec deep_unicode_char_list(term()) -> boolean().
+-spec deep_unicode_char_list(Term) -> boolean() when
+ Term :: term().
deep_unicode_char_list(Cs) ->
deep_unicode_char_list(Cs, []).
@@ -462,7 +524,8 @@ printable_list(_) -> false. %Everything else is false
%% Everything that is not a control character and not invalid unicode
%% will be considered printable.
--spec printable_unicode_list(term()) -> boolean().
+-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);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-06 22:05:37 +0000