diff options
Diffstat (limited to 'lib/stdlib/src/io_lib.erl')
| -rw-r--r-- | lib/stdlib/src/io_lib.erl | 224 |
1 files changed, 117 insertions, 107 deletions
diff --git a/lib/stdlib/src/io_lib.erl b/lib/stdlib/src/io_lib.erl index df5f9b8c25..b7ec848e1e 100644 --- a/lib/stdlib/src/io_lib.erl +++ b/lib/stdlib/src/io_lib.erl @@ -64,29 +64,31 @@ -export([print/1,print/4,indentation/2]). -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]). +-export([write_atom/1,write_string/1,write_string/2,write_latin1_string/1, + write_latin1_string/2, write_char/1, write_latin1_char/1]). --export([write_unicode_string_as_latin1/1, write_unicode_string_as_latin1/2, - write_unicode_char_as_latin1/1]). +-export([write_string_as_latin1/1, write_string_as_latin1/2, + write_char_as_latin1/1]). --export([quote_atom/2, char_list/1, unicode_char_list/1, - deep_char_list/1, deep_unicode_char_list/1, - printable_list/1, printable_unicode_list/1]). +-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]). %% Utilities for collecting characters. -export([collect_chars/3, collect_chars/4, collect_line/2, collect_line/3, collect_line/4, get_until/3, get_until/4]). --export_type([chars/0, unicode_chars/0, unicode_string/0, continuation/0, - fread_error/0]). +%% The following functions were used by Yecc's include-file. +-export([write_unicode_string/1, write_unicode_char/1, + deep_unicode_char_list/1]). + +-export_type([chars/0, latin1_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 latin1_string() :: [unicode:latin1_char()]. -type depth() :: -1 | non_neg_integer(). -opaque continuation() :: {Format :: string(), @@ -108,10 +110,8 @@ %% Interface calls to sub-modules. --spec fwrite(Format, Data) -> chars() | UnicodeList when +-spec fwrite(Format, Data) -> chars() when Format :: io:format(), - Data :: [term()], - UnicodeList :: [unicode:unicode_char()], Data :: [term()]. fwrite(Format, Args) -> @@ -142,10 +142,9 @@ fread(Chars, Format) -> fread(Cont, Chars, Format) -> io_lib_fread:fread(Cont, Chars, Format). --spec format(Format, Data) -> chars() | UnicodeList when +-spec format(Format, Data) -> chars() when Format :: io:format(), - Data :: [term()], - UnicodeList :: [unicode:unicode_char()]. + Data :: [term()]. format(Format, Args) -> case catch io_lib_format:fwrite(Format, Args) of @@ -340,6 +339,11 @@ name_char($_) -> true; name_char($@) -> true; name_char(_) -> false. +%%% There are two functions to write Unicode strings: +%%% - they both escape control characters < 160; +%%% - write_string() never escapes characters >= 160; +%%% - write_string_as_latin1() also escapes characters >= 255. + %% write_string([Char]) -> [Char] %% Generate the list of characters needed to print a string. @@ -352,33 +356,32 @@ write_string(S) -> -spec write_string(string(), char()) -> chars(). write_string(S, Q) -> - [Q|write_string1(latin1, S, Q)]. + [Q|write_string1(unicode_as_unicode, 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. +%% Backwards compatibility. +write_unicode_string(S) -> + write_string(S). --spec write_unicode_string(UnicodeString) -> unicode_string() when - UnicodeString :: unicode_string(). +-spec write_latin1_string(Latin1String) -> latin1_string() when + Latin1String :: latin1_string(). -write_unicode_string(S) -> - write_unicode_string(S, $"). %" +write_latin1_string(S) -> + write_latin1_string(S, $"). %" --spec write_unicode_string(unicode_string(), char()) -> unicode_string(). +-spec write_latin1_string(latin1_string(), char()) -> latin1_string(). -write_unicode_string(S, Q) -> - [Q|write_string1(unicode_as_unicode, S, Q)]. +write_latin1_string(S, Q) -> + [Q|write_string1(latin1, S, Q)]. --spec write_unicode_string_as_latin1(UnicodeString) -> string() when - UnicodeString :: unicode_string(). +-spec write_string_as_latin1(String) -> latin1_string() when + String :: string(). -write_unicode_string_as_latin1(S) -> - write_unicode_string_as_latin1(S, $"). %" +write_string_as_latin1(S) -> + write_string_as_latin1(S, $"). %" --spec write_unicode_string_as_latin1(unicode_string(), char()) -> string(). +-spec write_string_as_latin1(string(), char()) -> latin1_string(). -write_unicode_string_as_latin1(S, Q) -> +write_string_as_latin1(S, Q) -> [Q|write_string1(unicode_as_latin1, S, Q)]. write_string1(_,[], Q) -> @@ -412,6 +415,11 @@ string_char(_,C, _, Tail) when C < $\240-> %Other control characters. C3 = (C band 7) + $0, [$\\,C1,C2,C3|Tail]. +%%% There are two functions to write a Unicode character: +%%% - they both escape control characters < 160; +%%% - write_char() never escapes characters >= 160; +%%% - write_char_as_latin1() also escapes characters >= 255. + %% write_char(Char) -> [char()]. %% Generate the list of characters needed to print a character constant. %% Must special case SPACE, $\s, here. @@ -420,48 +428,63 @@ string_char(_,C, _, Tail) when C < $\240-> %Other control characters. Char :: char(). write_char($\s) -> "$\\s"; %Must special case this. -write_char(C) when is_integer(C), C >= $\000, C =< $\377 -> - [$$|string_char(latin1,C, -1, [])]. +write_char(C) when is_integer(C), C >= $\000 -> + [$$|string_char(unicode_as_unicode, C, -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. +%% Backwards compatibility. +write_unicode_char(C) -> + write_char(C). --spec write_unicode_char(UnicodeChar) -> unicode_string() when - UnicodeChar :: unicode:unicode_char(). +-spec write_latin1_char(Latin1Char) -> latin1_string() when + Latin1Char :: unicode:latin1_char(). -write_unicode_char(Uni) when is_integer(Uni), Uni >= $\000 -> - [$$|string_char(unicode_as_unicode,Uni, -1, [])]. +write_latin1_char(Lat1) when is_integer(Lat1), Lat1 >= $\000, Lat1 =< $\377 -> + [$$|string_char(latin1, Lat1, -1, [])]. --spec write_unicode_char_as_latin1(UnicodeChar) -> string() when - UnicodeChar :: unicode:unicode_char(). +-spec write_char_as_latin1(Char) -> latin1_string() when + Char :: char(). -write_unicode_char_as_latin1(Uni) when is_integer(Uni), Uni >= $\000 -> +write_char_as_latin1(Uni) when is_integer(Uni), Uni >= $\000 -> [$$|string_char(unicode_as_latin1,Uni, -1, [])]. -%% char_list(CharList) -%% deep_char_list(CharList) -%% Return true if CharList is a (possibly deep) list of characters, else -%% false. +%% latin1_char_list(CharList) +%% deep_latin1_char_list(CharList) +%% Return true if CharList is a (possibly deep) list of Latin-1 +%% characters, else false. + +-spec latin1_char_list(Term) -> boolean() when + Term :: term(). + +latin1_char_list([C|Cs]) when is_integer(C), C >= $\000, C =< $\377 -> + latin1_char_list(Cs); +latin1_char_list([]) -> true; +latin1_char_list(_) -> false. %Everything else is false -spec char_list(Term) -> boolean() when Term :: term(). -char_list([C|Cs]) when is_integer(C), C >= $\000, C =< $\377 -> +char_list([C|Cs]) when is_integer(C), C >= 0, C < 16#D800; + is_integer(C), C > 16#DFFF, C < 16#FFFE; + is_integer(C), C > 16#FFFF, C =< 16#10FFFF -> char_list(Cs); char_list([]) -> true; char_list(_) -> false. %Everything else is false --spec unicode_char_list(Term) -> boolean() when +-spec deep_latin1_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; - is_integer(C), C > 16#FFFF, C =< 16#10FFFF -> - unicode_char_list(Cs); -unicode_char_list([]) -> true; -unicode_char_list(_) -> false. %Everything else is false +deep_latin1_char_list(Cs) -> + deep_latin1_char_list(Cs, []). + +deep_latin1_char_list([C|Cs], More) when is_list(C) -> + deep_latin1_char_list(C, [Cs|More]); +deep_latin1_char_list([C|Cs], More) when is_integer(C), C >= $\000, C =< $\377 -> + deep_latin1_char_list(Cs, More); +deep_latin1_char_list([], [Cs|More]) -> + deep_latin1_char_list(Cs, More); +deep_latin1_char_list([], []) -> true; +deep_latin1_char_list(_, _More) -> %Everything else is false + false. -spec deep_char_list(Term) -> boolean() when Term :: term(). @@ -471,43 +494,56 @@ deep_char_list(Cs) -> deep_char_list([C|Cs], More) when is_list(C) -> deep_char_list(C, [Cs|More]); -deep_char_list([C|Cs], More) when is_integer(C), C >= $\000, C =< $\377 -> +deep_char_list([C|Cs], More) + when is_integer(C), C >= 0, C < 16#D800; + is_integer(C), C > 16#DFFF, C < 16#FFFE; + is_integer(C), C > 16#FFFF, C =< 16#10FFFF -> deep_char_list(Cs, More); deep_char_list([], [Cs|More]) -> deep_char_list(Cs, More); deep_char_list([], []) -> true; -deep_char_list(_, _More) -> %Everything else is false +deep_char_list(_, _More) -> %Everything else is false false. --spec deep_unicode_char_list(Term) -> boolean() when - Term :: term(). +deep_unicode_char_list(Term) -> + deep_char_list(Term). -deep_unicode_char_list(Cs) -> - deep_unicode_char_list(Cs, []). +%% printable_latin1_list([Char]) -> boolean() +%% Return true if CharList is a list of printable Latin1 characters, else +%% false. -deep_unicode_char_list([C|Cs], More) when is_list(C) -> - deep_unicode_char_list(C, [Cs|More]); -deep_unicode_char_list([C|Cs], More) - when is_integer(C), C >= 0, C < 16#D800; - is_integer(C), C > 16#DFFF, C < 16#FFFE; - is_integer(C), C > 16#FFFF, C =< 16#10FFFF -> - deep_unicode_char_list(Cs, More); -deep_unicode_char_list([], [Cs|More]) -> - deep_unicode_char_list(Cs, More); -deep_unicode_char_list([], []) -> true; -deep_unicode_char_list(_, _More) -> %Everything else is false - false. +-spec printable_latin1_list(Term) -> boolean() when + Term :: term(). + +printable_latin1_list([C|Cs]) when is_integer(C), C >= $\040, C =< $\176 -> + printable_latin1_list(Cs); +printable_latin1_list([C|Cs]) when is_integer(C), C >= $\240, C =< $\377 -> + printable_latin1_list(Cs); +printable_latin1_list([$\n|Cs]) -> printable_latin1_list(Cs); +printable_latin1_list([$\r|Cs]) -> printable_latin1_list(Cs); +printable_latin1_list([$\t|Cs]) -> printable_latin1_list(Cs); +printable_latin1_list([$\v|Cs]) -> printable_latin1_list(Cs); +printable_latin1_list([$\b|Cs]) -> printable_latin1_list(Cs); +printable_latin1_list([$\f|Cs]) -> printable_latin1_list(Cs); +printable_latin1_list([$\e|Cs]) -> printable_latin1_list(Cs); +printable_latin1_list([]) -> true; +printable_latin1_list(_) -> false. %Everything else is false %% printable_list([Char]) -> boolean() %% Return true if CharList is a list of printable characters, else -%% false. +%% 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. -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]) when is_integer(C), C >= $\240, C =< $\377 -> +printable_list([C|Cs]) + when is_integer(C), C >= 16#A0, C < 16#D800; + is_integer(C), C > 16#DFFF, C < 16#FFFE; + is_integer(C), C > 16#FFFF, C =< 16#10FFFF -> printable_list(Cs); printable_list([$\n|Cs]) -> printable_list(Cs); printable_list([$\r|Cs]) -> printable_list(Cs); @@ -517,33 +553,7 @@ printable_list([$\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([Char]) -> boolean() -%% 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. - --spec printable_unicode_list(Term) -> boolean() when - Term :: term(). - -printable_unicode_list([C|Cs]) when is_integer(C), C >= $\040, C =< $\176 -> - printable_unicode_list(Cs); -printable_unicode_list([C|Cs]) - when is_integer(C), C >= 16#A0, C < 16#D800; - is_integer(C), C > 16#DFFF, C < 16#FFFE; - is_integer(C), C > 16#FFFF, C =< 16#10FFFF -> - printable_unicode_list(Cs); -printable_unicode_list([$\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 +printable_list(_) -> false. %Everything else is false %% List = nl() %% Return a list of characters to generate a newline. |