diff options
Diffstat (limited to 'lib/stdlib/src/io_lib_format.erl')
| -rw-r--r-- | lib/stdlib/src/io_lib_format.erl | 53 |
1 files changed, 26 insertions, 27 deletions
diff --git a/lib/stdlib/src/io_lib_format.erl b/lib/stdlib/src/io_lib_format.erl index 4b2d15c8b3..64edbf1824 100644 --- a/lib/stdlib/src/io_lib_format.erl +++ b/lib/stdlib/src/io_lib_format.erl @@ -95,7 +95,7 @@ print([]) -> []. print(C, F, Ad, P, Pad, Encoding, Strings) -> - [$~] ++ print_field_width(F, Ad) ++ print_precision(P) ++ + [$~] ++ print_field_width(F, Ad) ++ print_precision(P, Pad) ++ print_pad_char(Pad) ++ print_encoding(Encoding) ++ print_strings(Strings) ++ [C]. @@ -103,8 +103,9 @@ print_field_width(none, _Ad) -> ""; print_field_width(F, left) -> integer_to_list(-F); print_field_width(F, right) -> integer_to_list(F). -print_precision(none) -> ""; -print_precision(P) -> [$. | integer_to_list(P)]. +print_precision(none, $\s) -> ""; +print_precision(none, _Pad) -> "."; % pad must be second dot +print_precision(P, _Pad) -> [$. | integer_to_list(P)]. print_pad_char($\s) -> ""; % default, no need to make explicit print_pad_char(Pad) -> [$., Pad]. @@ -126,25 +127,23 @@ collect_cseq(Fmt0, Args0) -> {F,Ad,Fmt1,Args1} = field_width(Fmt0, Args0), {P,Fmt2,Args2} = precision(Fmt1, Args1), {Pad,Fmt3,Args3} = pad_char(Fmt2, Args2), - {Encoding,Fmt4,Args4} = encoding(Fmt3, Args3), - {Strings,Fmt5,Args5} = strings(Fmt4, Args4), - {C,As,Fmt6,Args6} = collect_cc(Fmt5, Args5), - FormatSpec = #{control_char => C, args => As, width => F, adjust => Ad, - precision => P, pad_char => Pad, encoding => Encoding, - strings => Strings}, - {FormatSpec,Fmt6,Args6}. - -encoding([$t|Fmt],Args) -> - true = hd(Fmt) =/= $l, - {unicode,Fmt,Args}; -encoding(Fmt,Args) -> - {latin1,Fmt,Args}. - -strings([$l|Fmt],Args) -> - true = hd(Fmt) =/= $t, - {false,Fmt,Args}; -strings(Fmt,Args) -> - {true,Fmt,Args}. + Spec0 = #{width => F, + adjust => Ad, + precision => P, + pad_char => Pad, + encoding => latin1, + strings => true}, + {Spec1,Fmt4} = modifiers(Fmt3, Spec0), + {C,As,Fmt5,Args4} = collect_cc(Fmt4, Args3), + Spec2 = Spec1#{control_char => C, args => As}, + {Spec2,Fmt5,Args4}. + +modifiers([$t|Fmt], Spec) -> + modifiers(Fmt, Spec#{encoding => unicode}); +modifiers([$l|Fmt], Spec) -> + modifiers(Fmt, Spec#{strings => false}); +modifiers(Fmt, Spec) -> + {Spec, Fmt}. field_width([$-|Fmt0], Args0) -> {F,Fmt,Args} = field_value(Fmt0, Args0), @@ -380,7 +379,7 @@ float_e(_Fl, {Ds,E}, P) -> {Fs,false} -> [Fs|float_exp(E-1)] end. -%% float_man([Digit], Icount, Dcount) -> {[Chars],CarryFlag}. +%% float_man([Digit], Icount, Dcount) -> {[Char],CarryFlag}. %% Generate the characters in the mantissa from the digits with Icount %% characters before the '.' and Dcount decimals. Handle carry and let %% caller decide what to do at top. @@ -395,7 +394,7 @@ float_man([D|Ds], I, Dc) -> {Cs,false} -> {[D|Cs],false} end; float_man([], I, Dc) -> %Pad with 0's - {string:chars($0, I, [$.|string:chars($0, Dc)]),false}. + {lists:duplicate(I, $0) ++ [$.|lists:duplicate(Dc, $0)],false}. float_man([D|_], 0) when D >= $5 -> {[],true}; float_man([_|_], 0) -> {[],false}; @@ -405,7 +404,7 @@ float_man([D|Ds], Dc) -> {Cs,true} -> {[D+1|Cs],false}; {Cs,false} -> {[D|Cs],false} end; -float_man([], Dc) -> {string:chars($0, Dc),false}. %Pad with 0's +float_man([], Dc) -> {lists:duplicate(Dc, $0),false}. %Pad with 0's %% float_exp(Exponent) -> [Char]. %% Generate the exponent of a floating point number. Always include sign. @@ -429,7 +428,7 @@ fwrite_f(Fl, F, Adj, P, Pad) when P >= 1 -> float_f(Fl, Fd, P) when Fl < 0.0 -> [$-|float_f(-Fl, Fd, P)]; float_f(Fl, {Ds,E}, P) when E =< 0 -> - float_f(Fl, {string:chars($0, -E+1, Ds),1}, P); %Prepend enough 0's + float_f(Fl, {lists:duplicate(-E+1, $0)++Ds,1}, P); %Prepend enough 0's float_f(_Fl, {Ds,E}, P) -> case float_man(Ds, E, P) of {Fs,true} -> "1" ++ Fs; %Handle carry @@ -751,7 +750,7 @@ adjust(Data, Pad, right) -> [Pad|Data]. flat_trunc(List, N) when is_integer(N), N >= 0 -> string:slice(List, 0, N). -%% A deep version of string:chars/2,3 +%% A deep version of lists:duplicate/2 chars(_C, 0) -> []; |