forked from sheetjs/sheetjs
SheetJS
6e260c9185
- `sheet_to_json` handle arrays (h/t AaronWoodrow) - XLS parse comment visibility (h/t Godrules500) - chrome manifest v3 writeFile support - raw v8 (no TextEncoder/TextDecoder) optimization - handle empty shared formula body (h/t florian)
80 lines
2.4 KiB
TypeScript
80 lines
2.4 KiB
TypeScript
var Base64_map = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
|
|
function Base64_encode(input: string): string {
|
|
var o = "";
|
|
var c1=0, c2=0, c3=0, e1=0, e2=0, e3=0, e4=0;
|
|
for(var i = 0; i < input.length; ) {
|
|
c1 = input.charCodeAt(i++);
|
|
e1 = (c1 >> 2);
|
|
|
|
c2 = input.charCodeAt(i++);
|
|
e2 = ((c1 & 3) << 4) | (c2 >> 4);
|
|
|
|
c3 = input.charCodeAt(i++);
|
|
e3 = ((c2 & 15) << 2) | (c3 >> 6);
|
|
e4 = (c3 & 63);
|
|
if (isNaN(c2)) { e3 = e4 = 64; }
|
|
else if (isNaN(c3)) { e4 = 64; }
|
|
o += Base64_map.charAt(e1) + Base64_map.charAt(e2) + Base64_map.charAt(e3) + Base64_map.charAt(e4);
|
|
}
|
|
return o;
|
|
}
|
|
function Base64_encode_pass(input: string): string {
|
|
var o = "";
|
|
var c1=0, c2=0, c3=0, e1=0, e2=0, e3=0, e4=0;
|
|
for(var i = 0; i < input.length; ) {
|
|
c1 = input.charCodeAt(i++); if(c1 > 0xFF) c1 = 0x5F;
|
|
e1 = (c1 >> 2);
|
|
|
|
c2 = input.charCodeAt(i++); if(c2 > 0xFF) c2 = 0x5F;
|
|
e2 = ((c1 & 3) << 4) | (c2 >> 4);
|
|
|
|
c3 = input.charCodeAt(i++); if(c3 > 0xFF) c3 = 0x5F;
|
|
e3 = ((c2 & 15) << 2) | (c3 >> 6);
|
|
e4 = (c3 & 63);
|
|
if (isNaN(c2)) { e3 = e4 = 64; }
|
|
else if (isNaN(c3)) { e4 = 64; }
|
|
o += Base64_map.charAt(e1) + Base64_map.charAt(e2) + Base64_map.charAt(e3) + Base64_map.charAt(e4);
|
|
}
|
|
return o;
|
|
}
|
|
function Base64_encode_arr(input: Uint8Array|number[]): string {
|
|
var o = "";
|
|
var c1=0, c2=0, c3=0, e1=0, e2=0, e3=0, e4=0;
|
|
for(var i = 0; i < input.length; ) {
|
|
c1 = input[i++];
|
|
e1 = (c1 >> 2);
|
|
|
|
c2 = input[i++];
|
|
e2 = ((c1 & 3) << 4) | (c2 >> 4);
|
|
|
|
c3 = input[i++];
|
|
e3 = ((c2 & 15) << 2) | (c3 >> 6);
|
|
e4 = (c3 & 63);
|
|
if (isNaN(c2)) { e3 = e4 = 64; }
|
|
else if (isNaN(c3)) { e4 = 64; }
|
|
o += Base64_map.charAt(e1) + Base64_map.charAt(e2) + Base64_map.charAt(e3) + Base64_map.charAt(e4);
|
|
}
|
|
return o;
|
|
}
|
|
function Base64_decode(input: string): string {
|
|
var o = "";
|
|
var c1=0, c2=0, c3=0, e1=0, e2=0, e3=0, e4=0;
|
|
input = input.replace(/^data:([^\/]+\/[^\/]+)?;base64\,/,'')
|
|
.replace(/[^\w\+\/\=]/g, "")
|
|
for(var i = 0; i < input.length;) {
|
|
e1 = Base64_map.indexOf(input.charAt(i++));
|
|
e2 = Base64_map.indexOf(input.charAt(i++));
|
|
c1 = (e1 << 2) | (e2 >> 4);
|
|
o += String.fromCharCode(c1);
|
|
|
|
e3 = Base64_map.indexOf(input.charAt(i++));
|
|
c2 = ((e2 & 15) << 4) | (e3 >> 2);
|
|
if (e3 !== 64) { o += String.fromCharCode(c2); }
|
|
|
|
e4 = Base64_map.indexOf(input.charAt(i++));
|
|
c3 = ((e3 & 3) << 6) | e4;
|
|
if (e4 !== 64) { o += String.fromCharCode(c3); }
|
|
}
|
|
return o;
|
|
}
|