diff options
Diffstat (limited to 'lib/stdlib/src/string.erl')
| -rw-r--r-- | lib/stdlib/src/string.erl | 107 |
1 files changed, 78 insertions, 29 deletions
diff --git a/lib/stdlib/src/string.erl b/lib/stdlib/src/string.erl index 30eac4f07d..c659db78bd 100644 --- a/lib/stdlib/src/string.erl +++ b/lib/stdlib/src/string.erl @@ -1,18 +1,19 @@ %% %% %CopyrightBegin% %% -%% Copyright Ericsson AB 1996-2011. All Rights Reserved. +%% Copyright Ericsson AB 1996-2016. All Rights Reserved. %% -%% The contents of this file are subject to the Erlang Public License, -%% Version 1.1, (the "License"); you may not use this file except in -%% compliance with the License. You should have received a copy of the -%% Erlang Public License along with this software. If not, it can be -%% retrieved online at http://www.erlang.org/. -%% -%% Software distributed under the License is distributed on an "AS IS" -%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See -%% the License for the specific language governing rights and limitations -%% under the License. +%% Licensed under the Apache License, Version 2.0 (the "License"); +%% you may not use this file except in compliance with the License. +%% You may obtain a copy of the License at +%% +%% http://www.apache.org/licenses/LICENSE-2.0 +%% +%% Unless required by applicable law or agreed to in writing, software +%% distributed under the License is distributed on an "AS IS" BASIS, +%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +%% See the License for the specific language governing permissions and +%% limitations under the License. %% %% %CopyrightEnd% %% @@ -29,6 +30,30 @@ %%--------------------------------------------------------------------------- +%%% BIFs + +-export([to_float/1, to_integer/1]). + +-spec to_float(String) -> {Float, Rest} | {error, Reason} when + String :: string(), + Float :: float(), + Rest :: string(), + Reason :: no_float | not_a_list. + +to_float(_) -> + erlang:nif_error(undef). + +-spec to_integer(String) -> {Int, Rest} | {error, Reason} when + String :: string(), + Int :: integer(), + Rest :: string(), + Reason :: no_integer | not_a_list. + +to_integer(_) -> + erlang:nif_error(undef). + +%%% End of BIFs + %% Robert's bit %% len(String) @@ -197,23 +222,47 @@ substr2([_|String], S) -> substr2(String, S-1). Tokens :: [Token :: nonempty_string()]. tokens(S, Seps) -> - tokens1(S, Seps, []). + case Seps of + [] -> + case S of + [] -> []; + [_|_] -> [S] + end; + [C] -> + tokens_single_1(reverse(S), C, []); + [_|_] -> + tokens_multiple_1(reverse(S), Seps, []) + end. -tokens1([C|S], Seps, Toks) -> +tokens_single_1([Sep|S], Sep, Toks) -> + tokens_single_1(S, Sep, Toks); +tokens_single_1([C|S], Sep, Toks) -> + tokens_single_2(S, Sep, Toks, [C]); +tokens_single_1([], _, Toks) -> + Toks. + +tokens_single_2([Sep|S], Sep, Toks, Tok) -> + tokens_single_1(S, Sep, [Tok|Toks]); +tokens_single_2([C|S], Sep, Toks, Tok) -> + tokens_single_2(S, Sep, Toks, [C|Tok]); +tokens_single_2([], _Sep, Toks, Tok) -> + [Tok|Toks]. + +tokens_multiple_1([C|S], Seps, Toks) -> case member(C, Seps) of - true -> tokens1(S, Seps, Toks); - false -> tokens2(S, Seps, Toks, [C]) + true -> tokens_multiple_1(S, Seps, Toks); + false -> tokens_multiple_2(S, Seps, Toks, [C]) end; -tokens1([], _Seps, Toks) -> - reverse(Toks). +tokens_multiple_1([], _Seps, Toks) -> + Toks. -tokens2([C|S], Seps, Toks, Cs) -> +tokens_multiple_2([C|S], Seps, Toks, Tok) -> case member(C, Seps) of - true -> tokens1(S, Seps, [reverse(Cs)|Toks]); - false -> tokens2(S, Seps, Toks, [C|Cs]) + true -> tokens_multiple_1(S, Seps, [Tok|Toks]); + false -> tokens_multiple_2(S, Seps, Toks, [C|Tok]) end; -tokens2([], _Seps, Toks, Cs) -> - reverse([reverse(Cs)|Toks]). +tokens_multiple_2([], _Seps, Toks, Tok) -> + [Tok|Toks]. -spec chars(Character, Number) -> String when Character :: char(), @@ -232,8 +281,8 @@ chars(C, N, Tail) when N > 0 -> chars(C, N-1, [C|Tail]); chars(C, 0, Tail) when is_integer(C) -> Tail. - -%% Torbj�rn's bit. + +%% Torbjörn's bit. %%% COPIES %%% @@ -436,7 +485,7 @@ sub_string(String, Start) -> substr(String, Start). Stop :: pos_integer(). sub_string(String, Start, Stop) -> substr(String, Start, Stop - Start + 1). - + %% ISO/IEC 8859-1 (latin1) letters are converted, others are ignored %% @@ -459,8 +508,8 @@ to_upper_char(C) -> C. -spec to_lower(String) -> Result when - String :: string(), - Result :: string() + String :: io_lib:latin1_string(), + Result :: io_lib:latin1_string() ; (Char) -> CharResult when Char :: char(), CharResult :: char(). @@ -471,8 +520,8 @@ to_lower(C) when is_integer(C) -> to_lower_char(C). -spec to_upper(String) -> Result when - String :: string(), - Result :: string() + String :: io_lib:latin1_string(), + Result :: io_lib:latin1_string() ; (Char) -> CharResult when Char :: char(), CharResult :: char(). |