xsheetjs/bits/05_buf.js
SheetJS 4aeb0a786a version bump 0.15.0: mini build
- new xlsx.mini build that strips XLS/XLSB/niche formats
- updated CFB to 1.1.3
- removed niche sheet_to_{dif,slk,eth} utilities
- removed exported ODS parse/write funcs, read/write still supports ODS
2019-08-04 16:12:56 -04:00

62 lines
2.3 KiB
JavaScript

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 */
return has_buf ? Buffer.alloc(len) : new Array(len);
/* jshint +W056 */
}
function new_unsafe_buf(len/*:number*/) {
/* jshint -W056 */
return has_buf ? Buffer.allocUnsafe(len) : new Array(len);
/* jshint +W056 */
}
var s2a = function s2a(s/*:string*/)/*:any*/ {
// $FlowIgnore
if(has_buf) return Buffer_from(s, "binary");
return s.split("").map(function(x/*:string*/)/*:number*/{ return x.charCodeAt(0) & 0xff; });
};
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;
}
var bconcat = function(bufs) { return [].concat.apply([], bufs); };
var chr0 = /\u0000/g, chr1 = /[\u0001-\u0006]/g;