sheetjs/bits/05_buf.js

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