forked from sheetjs/sheetjs
108 lines
3.7 KiB
JavaScript
108 lines
3.7 KiB
JavaScript
var has_buf = (typeof Buffer !== 'undefined' && typeof process !== 'undefined' && typeof process.versions !== 'undefined' && !!process.versions.node);
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var Buffer_from = /*::(*/function(){}/*:: :any)*/;
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if(typeof Buffer !== 'undefined') {
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var nbfs = !Buffer.from;
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if(!nbfs) try { Buffer.from("foo", "utf8"); } catch(e) { nbfs = true; }
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Buffer_from = nbfs ? function(buf, enc) { return (enc) ? new Buffer(buf, enc) : new Buffer(buf); } : Buffer.from.bind(Buffer);
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// $FlowIgnore
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if(!Buffer.alloc) Buffer.alloc = function(n) { return new Buffer(n); };
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// $FlowIgnore
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if(!Buffer.allocUnsafe) Buffer.allocUnsafe = function(n) { return new Buffer(n); };
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}
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function new_raw_buf(len/*:number*/) {
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/* jshint -W056 */
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return has_buf ? Buffer.alloc(len) : typeof Uint8Array != "undefined" ? new Uint8Array(len) : new Array(len);
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/* jshint +W056 */
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}
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function new_unsafe_buf(len/*:number*/) {
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/* jshint -W056 */
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return has_buf ? Buffer.allocUnsafe(len) : typeof Uint8Array != "undefined" ? new Uint8Array(len) : new Array(len);
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/* jshint +W056 */
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}
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var s2a = function s2a(s/*:string*/)/*:any*/ {
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if(has_buf) return Buffer_from(s, "binary");
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return s.split("").map(function(x/*:string*/)/*:number*/{ return x.charCodeAt(0) & 0xff; });
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};
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function s2ab(s/*:string*/)/*:any*/ {
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if(typeof ArrayBuffer === 'undefined') return s2a(s);
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var buf = new ArrayBuffer(s.length), view = new Uint8Array(buf);
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for (var i=0; i!=s.length; ++i) view[i] = s.charCodeAt(i) & 0xFF;
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return buf;
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}
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function a2s(data/*:any*/)/*:string*/ {
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if(Array.isArray(data)) return data.map(function(c) { return String.fromCharCode(c); }).join("");
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var o/*:Array<string>*/ = []; for(var i = 0; i < data.length; ++i) o[i] = String.fromCharCode(data[i]); return o.join("");
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}
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function a2u(data/*:Array<number>*/)/*:Uint8Array*/ {
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if(typeof Uint8Array === 'undefined') throw new Error("Unsupported");
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return new Uint8Array(data);
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}
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function ab2a(data/*:ArrayBuffer|Uint8Array*/)/*:Array<number>*/ {
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if(typeof ArrayBuffer == 'undefined') throw new Error("Unsupported");
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if(data instanceof ArrayBuffer) return ab2a(new Uint8Array(data));
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/*:: if(data instanceof ArrayBuffer) throw new Error("unreachable"); */
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var o = new Array(data.length);
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for(var i = 0; i < data.length; ++i) o[i] = data[i];
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return o;
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}
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function utf8decode(content/*:string*/) {
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var out = [], widx = 0, L = content.length + 250;
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var o = new_raw_buf(content.length + 255);
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for(var ridx = 0; ridx < content.length; ++ridx) {
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var c = content.charCodeAt(ridx);
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if(c < 0x80) o[widx++] = c;
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else if(c < 0x800) {
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o[widx++] = (192|((c>>6)&31));
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o[widx++] = (128|(c&63));
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} else if(c >= 0xD800 && c < 0xE000) {
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c = (c&1023)+64;
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var d = content.charCodeAt(++ridx)&1023;
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o[widx++] = (240|((c>>8)&7));
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o[widx++] = (128|((c>>2)&63));
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o[widx++] = (128|((d>>6)&15)|((c&3)<<4));
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o[widx++] = (128|(d&63));
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} else {
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o[widx++] = (224|((c>>12)&15));
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o[widx++] = (128|((c>>6)&63));
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o[widx++] = (128|(c&63));
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}
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if(widx > L) {
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out.push(o.slice(0, widx));
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widx = 0;
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o = new_raw_buf(65535);
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L = 65530;
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}
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}
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out.push(o.slice(0, widx));
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return bconcat(out);
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}
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var bconcat = function(bufs) {
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if(typeof Uint8Array !== "undefined") {
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var i = 0, maxlen = 0;
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for(i = 0; i < bufs.length; ++i) maxlen += bufs[i].length;
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var o = new Uint8Array(maxlen);
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var len = 0;
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for(i = 0, maxlen = 0; i < bufs.length; maxlen += len, ++i) {
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len = bufs[i].length;
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if(bufs[i] instanceof Uint8Array) o.set(bufs[i], maxlen);
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else if(typeof bufs[i] == "string") { throw "wtf"; }
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else o.set(new Uint8Array(bufs[i]), maxlen);
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}
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return o;
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}
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return [].concat.apply([], bufs.map(function(buf) { return Array.isArray(buf) ? buf : [].slice.call(buf); }));
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};
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var chr0 = /\u0000/g, chr1 = /[\u0001-\u0006]/g;
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