mirror of
https://github.com/processone/ejabberd.git
synced 2024-11-22 16:20:52 +01:00
287 lines
7.3 KiB
Erlang
287 lines
7.3 KiB
Erlang
%%%----------------------------------------------------------------------
|
|
%%% File : str.erl
|
|
%%% Author : Evgeniy Khramtsov <ekhramtsov@process-one.net>
|
|
%%% Purpose : Provide binary string manipulations
|
|
%%% Created : 23 Feb 2012 by Evgeniy Khramtsov <ekhramtsov@process-one.net>
|
|
%%%
|
|
%%%
|
|
%%% ejabberd, Copyright (C) 2002-2016 ProcessOne
|
|
%%%
|
|
%%% This program is free software; you can redistribute it and/or
|
|
%%% modify it under the terms of the GNU General Public License as
|
|
%%% published by the Free Software Foundation; either version 2 of the
|
|
%%% License, or (at your option) any later version.
|
|
%%%
|
|
%%% This program is distributed in the hope that it will be useful,
|
|
%%% but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
%%% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
%%% General Public License for more details.
|
|
%%%
|
|
%%% You should have received a copy of the GNU General Public License along
|
|
%%% with this program; if not, write to the Free Software Foundation, Inc.,
|
|
%%% 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
%%%
|
|
%%%----------------------------------------------------------------------
|
|
|
|
-module(str).
|
|
|
|
-author('ekhramtsov@process-one.net').
|
|
|
|
%% API
|
|
-export([equal/2,
|
|
concat/2,
|
|
rchr/2,
|
|
str/2,
|
|
rstr/2,
|
|
span/2,
|
|
cspan/2,
|
|
copies/2,
|
|
words/1,
|
|
words/2,
|
|
sub_word/2,
|
|
sub_word/3,
|
|
strip/1,
|
|
strip/2,
|
|
len/1,
|
|
tokens/2,
|
|
left/2,
|
|
left/3,
|
|
right/2,
|
|
right/3,
|
|
centre/2,
|
|
centre/3,
|
|
sub_string/2,
|
|
sub_string/3,
|
|
to_upper/1,
|
|
join/2,
|
|
substr/2,
|
|
chr/2,
|
|
chars/3,
|
|
chars/2,
|
|
substr/3,
|
|
strip/3,
|
|
to_lower/1,
|
|
to_float/1,
|
|
prefix/2,
|
|
suffix/2,
|
|
to_integer/1]).
|
|
|
|
%%%===================================================================
|
|
%%% API
|
|
%%%===================================================================
|
|
-spec len(binary()) -> non_neg_integer().
|
|
|
|
len(B) ->
|
|
byte_size(B).
|
|
|
|
-spec equal(binary(), binary()) -> boolean().
|
|
|
|
equal(B1, B2) ->
|
|
B1 == B2.
|
|
|
|
-spec concat(binary(), binary()) -> binary().
|
|
|
|
concat(B1, B2) ->
|
|
<<B1/binary, B2/binary>>.
|
|
|
|
-spec rchr(binary(), char()) -> non_neg_integer().
|
|
|
|
rchr(B, C) ->
|
|
string:rchr(binary_to_list(B), C).
|
|
|
|
-spec str(binary(), binary()) -> non_neg_integer().
|
|
|
|
str(B1, B2) ->
|
|
string:str(binary_to_list(B1), binary_to_list(B2)).
|
|
|
|
-spec rstr(binary(), binary()) -> non_neg_integer().
|
|
|
|
rstr(B1, B2) ->
|
|
string:rstr(binary_to_list(B1), binary_to_list(B2)).
|
|
|
|
-spec span(binary(), binary()) -> non_neg_integer().
|
|
|
|
span(B1, B2) ->
|
|
string:span(binary_to_list(B1), binary_to_list(B2)).
|
|
|
|
-spec cspan(binary(), binary()) -> non_neg_integer().
|
|
|
|
cspan(B1, B2) ->
|
|
string:cspan(binary_to_list(B1), binary_to_list(B2)).
|
|
|
|
-spec copies(binary(), non_neg_integer()) -> binary().
|
|
|
|
copies(B, N) ->
|
|
iolist_to_binary(string:copies(binary_to_list(B), N)).
|
|
|
|
-spec words(binary()) -> pos_integer().
|
|
|
|
words(B) ->
|
|
string:words(binary_to_list(B)).
|
|
|
|
-spec words(binary(), char()) -> pos_integer().
|
|
|
|
words(B, C) ->
|
|
string:words(binary_to_list(B), C).
|
|
|
|
-spec sub_word(binary(), integer()) -> binary().
|
|
|
|
sub_word(B, N) ->
|
|
iolist_to_binary(string:sub_word(binary_to_list(B), N)).
|
|
|
|
-spec sub_word(binary(), integer(), char()) -> binary().
|
|
|
|
sub_word(B, N, C) ->
|
|
iolist_to_binary(string:sub_word(binary_to_list(B), N, C)).
|
|
|
|
-spec strip(binary()) -> binary().
|
|
|
|
strip(B) ->
|
|
iolist_to_binary(string:strip(binary_to_list(B))).
|
|
|
|
-spec strip(binary(), both | left | right) -> binary().
|
|
|
|
strip(B, D) ->
|
|
iolist_to_binary(string:strip(binary_to_list(B), D)).
|
|
|
|
-spec left(binary(), non_neg_integer()) -> binary().
|
|
|
|
left(B, N) ->
|
|
iolist_to_binary(string:left(binary_to_list(B), N)).
|
|
|
|
-spec left(binary(), non_neg_integer(), char()) -> binary().
|
|
|
|
left(B, N, C) ->
|
|
iolist_to_binary(string:left(binary_to_list(B), N, C)).
|
|
|
|
-spec right(binary(), non_neg_integer()) -> binary().
|
|
|
|
right(B, N) ->
|
|
iolist_to_binary(string:right(binary_to_list(B), N)).
|
|
|
|
-spec right(binary(), non_neg_integer(), char()) -> binary().
|
|
|
|
right(B, N, C) ->
|
|
iolist_to_binary(string:right(binary_to_list(B), N, C)).
|
|
|
|
-spec centre(binary(), non_neg_integer()) -> binary().
|
|
|
|
centre(B, N) ->
|
|
iolist_to_binary(string:centre(binary_to_list(B), N)).
|
|
|
|
-spec centre(binary(), non_neg_integer(), char()) -> binary().
|
|
|
|
centre(B, N, C) ->
|
|
iolist_to_binary(string:centre(binary_to_list(B), N, C)).
|
|
|
|
-spec sub_string(binary(), pos_integer()) -> binary().
|
|
|
|
sub_string(B, N) ->
|
|
iolist_to_binary(string:sub_string(binary_to_list(B), N)).
|
|
|
|
-spec sub_string(binary(), pos_integer(), pos_integer()) -> binary().
|
|
|
|
sub_string(B, S, E) ->
|
|
iolist_to_binary(string:sub_string(binary_to_list(B), S, E)).
|
|
|
|
-spec to_upper(binary()) -> binary();
|
|
(char()) -> char().
|
|
|
|
to_upper(B) when is_binary(B) ->
|
|
iolist_to_binary(string:to_upper(binary_to_list(B)));
|
|
to_upper(C) ->
|
|
string:to_upper(C).
|
|
|
|
-spec join([binary()], binary() | char()) -> binary().
|
|
|
|
join(L, Sep) ->
|
|
iolist_to_binary(join_s(L, Sep)).
|
|
|
|
-spec substr(binary(), pos_integer()) -> binary().
|
|
|
|
substr(B, N) ->
|
|
iolist_to_binary(string:substr(binary_to_list(B), N)).
|
|
|
|
-spec chr(binary(), char()) -> non_neg_integer().
|
|
|
|
chr(B, C) ->
|
|
string:chr(binary_to_list(B), C).
|
|
|
|
-spec chars(char(), non_neg_integer(), binary()) -> binary().
|
|
|
|
chars(C, N, B) ->
|
|
iolist_to_binary(string:chars(C, N, binary_to_list(B))).
|
|
|
|
-spec chars(char(), non_neg_integer()) -> binary().
|
|
|
|
chars(C, N) ->
|
|
iolist_to_binary(string:chars(C, N)).
|
|
|
|
-spec substr(binary(), pos_integer(), non_neg_integer()) -> binary().
|
|
|
|
substr(B, S, E) ->
|
|
iolist_to_binary(string:substr(binary_to_list(B), S, E)).
|
|
|
|
-spec strip(binary(), both | left | right, char()) -> binary().
|
|
|
|
strip(B, D, C) ->
|
|
iolist_to_binary(string:strip(binary_to_list(B), D, C)).
|
|
|
|
-spec to_lower(binary()) -> binary();
|
|
(char()) -> char().
|
|
|
|
to_lower(B) when is_binary(B) ->
|
|
iolist_to_binary(string:to_lower(binary_to_list(B)));
|
|
to_lower(C) ->
|
|
string:to_lower(C).
|
|
|
|
-spec tokens(binary(), binary()) -> [binary()].
|
|
|
|
tokens(B1, B2) ->
|
|
[iolist_to_binary(T) ||
|
|
T <- string:tokens(binary_to_list(B1), binary_to_list(B2))].
|
|
|
|
-spec to_float(binary()) -> {float(), binary()} | {error, no_float}.
|
|
|
|
to_float(B) ->
|
|
case string:to_float(binary_to_list(B)) of
|
|
{error, R} ->
|
|
{error, R};
|
|
{Float, Rest} ->
|
|
{Float, iolist_to_binary(Rest)}
|
|
end.
|
|
|
|
-spec to_integer(binary()) -> {integer(), binary()} | {error, no_integer}.
|
|
|
|
to_integer(B) ->
|
|
case string:to_integer(binary_to_list(B)) of
|
|
{error, R} ->
|
|
{error, R};
|
|
{Int, Rest} ->
|
|
{Int, iolist_to_binary(Rest)}
|
|
end.
|
|
|
|
-spec prefix(binary(), binary()) -> boolean().
|
|
|
|
prefix(Prefix, B) ->
|
|
Size = byte_size(Prefix),
|
|
case B of
|
|
<<Prefix:Size/binary, _/binary>> ->
|
|
true;
|
|
_ ->
|
|
false
|
|
end.
|
|
|
|
-spec suffix(binary(), binary()) -> boolean().
|
|
|
|
suffix(B1, B2) ->
|
|
lists:suffix(binary_to_list(B1), binary_to_list(B2)).
|
|
|
|
%%%===================================================================
|
|
%%% Internal functions
|
|
%%%===================================================================
|
|
join_s([], _Sep) ->
|
|
[];
|
|
join_s([H|T], Sep) ->
|
|
[H, [[Sep, X] || X <- T]].
|