2012-05-23 14:53:48 +02:00
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%% Copyright (c) 2011-2012, Loïc Hoguin <essen@ninenines.eu>
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2011-10-04 18:34:14 +02:00
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%%
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%% Permission to use, copy, modify, and/or distribute this software for any
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%% purpose with or without fee is hereby granted, provided that the above
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%% copyright notice and this permission notice appear in all copies.
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%%
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%% THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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%% WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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%% MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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%% ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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%% WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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%% ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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%% OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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%% @doc Binary string manipulation.
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-module(cowboy_bstr).
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-export([to_lower/1]). %% Binary strings.
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-export([char_to_lower/1, char_to_upper/1]). %% Characters.
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%% @doc Convert a binary string to lowercase.
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-spec to_lower(binary()) -> binary().
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to_lower(L) ->
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<< << (char_to_lower(C)) >> || << C >> <= L >>.
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%% @doc Convert [A-Z] characters to lowercase.
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%% @end
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%% We gain noticeable speed by matching each value directly.
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-spec char_to_lower(char()) -> char().
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char_to_lower($A) -> $a;
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char_to_lower($B) -> $b;
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char_to_lower($C) -> $c;
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char_to_lower($D) -> $d;
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char_to_lower($E) -> $e;
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char_to_lower($F) -> $f;
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char_to_lower($G) -> $g;
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char_to_lower($H) -> $h;
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char_to_lower($I) -> $i;
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char_to_lower($J) -> $j;
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char_to_lower($K) -> $k;
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char_to_lower($L) -> $l;
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char_to_lower($M) -> $m;
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char_to_lower($N) -> $n;
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char_to_lower($O) -> $o;
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char_to_lower($P) -> $p;
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char_to_lower($Q) -> $q;
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char_to_lower($R) -> $r;
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char_to_lower($S) -> $s;
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char_to_lower($T) -> $t;
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char_to_lower($U) -> $u;
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char_to_lower($V) -> $v;
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char_to_lower($W) -> $w;
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char_to_lower($X) -> $x;
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char_to_lower($Y) -> $y;
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char_to_lower($Z) -> $z;
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char_to_lower(Ch) -> Ch.
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%% @doc Convert [a-z] characters to uppercase.
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-spec char_to_upper(char()) -> char().
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char_to_upper($a) -> $A;
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char_to_upper($b) -> $B;
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char_to_upper($c) -> $C;
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char_to_upper($d) -> $D;
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char_to_upper($e) -> $E;
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char_to_upper($f) -> $F;
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char_to_upper($g) -> $G;
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char_to_upper($h) -> $H;
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char_to_upper($i) -> $I;
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char_to_upper($j) -> $J;
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char_to_upper($k) -> $K;
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char_to_upper($l) -> $L;
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char_to_upper($m) -> $M;
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char_to_upper($n) -> $N;
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char_to_upper($o) -> $O;
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char_to_upper($p) -> $P;
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char_to_upper($q) -> $Q;
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char_to_upper($r) -> $R;
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char_to_upper($s) -> $S;
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char_to_upper($t) -> $T;
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char_to_upper($u) -> $U;
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char_to_upper($v) -> $V;
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char_to_upper($w) -> $W;
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char_to_upper($x) -> $X;
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char_to_upper($y) -> $Y;
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char_to_upper($z) -> $Z;
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char_to_upper(Ch) -> Ch.
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