111 lines
3.0 KiB
Haxe
111 lines
3.0 KiB
Haxe
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/*
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* Copyright (C)2005-2019 Haxe Foundation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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@:coreApi class StringBuf {
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var b:hl.Bytes;
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var size:Int;
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var pos:Int;
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public var length(get, never):Int;
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public function new():Void {
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pos = 0;
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size = 8; // ensure 4 bytes expand for addChar()
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b = new hl.Bytes(size);
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}
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inline function get_length():Int {
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return pos >> 1;
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}
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inline function __expand(need:Int):Void {
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var nsize = (size * 3) >> 1;
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if (need > nsize)
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nsize = need;
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var b2 = new hl.Bytes(nsize);
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b2.blit(0, b, 0, pos);
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b = b2;
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size = nsize;
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}
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inline function __add(bytes:hl.Bytes, spos:Int, ssize:Int):Void {
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if (pos + ssize > size)
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__expand(pos + ssize);
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b.blit(pos, bytes, spos, ssize);
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pos += ssize;
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}
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public function add<T>(x:T):Void {
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var slen = 0;
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var str = Std.downcast((x:Dynamic),String);
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if( str != null ) {
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__add(@:privateAccess str.bytes, 0, str.length<<1);
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return;
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}
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var sbytes = hl.Bytes.fromValue(x, new hl.Ref(slen));
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__add(sbytes, 0, slen << 1);
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}
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public function addSub(s:String, pos:Int, ?len:Int):Void@:privateAccess {
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if (pos < 0)
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pos = 0;
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if (pos >= s.length)
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return;
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var slen:Int;
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if (len == null)
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slen = s.length - pos
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else {
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slen = len;
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if (pos + slen > s.length)
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slen = s.length - pos;
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if (slen <= 0)
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return;
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}
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__add(s.bytes, pos << 1, slen << 1);
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}
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public function addChar(c:Int):Void {
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if (c >= 0 && c < 0x10000) {
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if (c >= 0xD800 && c <= 0xDFFF)
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throw "Invalid unicode char " + c;
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if (pos + 2 > size)
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__expand(0);
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b.setUI16(pos, c);
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pos += 2;
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} else if (c < 0x110000) {
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if (pos + 4 > size)
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__expand(0);
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c -= 0x10000;
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b.setUI16(pos, (c >> 10) + 0xD800);
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b.setUI16(pos + 2, (c & 1023) + 0xDC00);
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pos += 4;
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} else
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throw "Invalid unicode char " + c;
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}
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public function toString():String {
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if (pos + 2 > size)
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__expand(0);
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b.setUI16(pos, 0);
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return @:privateAccess String.__alloc__(b, pos >> 1);
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}
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}
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