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it turns out that testing your code is a good idea

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I found a bug in my base64 implementation

have started implementing a "test system"
This commit is contained in:
pharpend
2022-10-19 21:47:46 -06:00
parent 0f1a181c08
commit 584ffff507
8 changed files with 705 additions and 13 deletions
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bindings/typescript/src/base64.ts
+12 -13
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@@ -94,30 +94,30 @@ encode3(bytes: Uint8Array) {
let b1 : number = bytes[1];
let b2 : number = bytes[2];
// ABCDEFGH 12345678 ABCDEFGH
// ABCDEFGH 12345678 abcdefgh
// b0 b1 b2
// ABCDEF GH1234 5678AB CDEFGH
// ABCDEF GH1234 5678ab cdefgh
// n0 n1 n2 n3
let n0 : number = b0 >> 2;
// n1 = __GH1234
// b0 = ABCDEFGH
// 4 = _____1__
// b0 % 4 = ______GH
// (b0 % 4) << 4 = __GH____
// b1 = 12345678
// b1 >> 4 = ____1234
// n1 = __GH1234
let n1 : number = ((b0 % 4) << 4) + (b1 >> 4);
// n2 = __5678AB
// b1 = 12345678
// 16 = ___1____
// b1 % 16 = ____5678
// (b1 % 16) << 2 = __5678__
// b1 = ABCDEFGH
// b1 >> 6 = ______AB
let n2 : number = ((b1 % 16) << 2) + (b1 >> 6);
// n3 = 00CDEFGH
// 64 = 01000000
// b2 = ABCDEFGH
// b2 = abcdefgh
// b2 >> 6 = ______ab
// n2 = __5678ab
let n2 : number = ((b1 % 16) << 2) + (b2 >> 6);
// b2 = abcdefgh
// 64 = _1______
// n3 = __cdefgh
let n3 : number = b2 % 64;
// convert to chars
@@ -183,7 +183,6 @@ encode1(bytes: Uint8Array): string {
*/
function
encode2(bytes: Uint8Array): string {
return int2char(n0) + int2char(n1) + '==';
let b0 : number = bytes[0];
let b1 : number = bytes[1];
@@ -192,19 +191,19 @@ encode2(bytes: Uint8Array): string {
// ABCDEF GH1234 5678__
// n0 n1 n2
let n0 : number = b0 >> 2;
// n1 = __GH1234
// b0 = ABCDEFGH
// 4 = _____1__
// b0 % 4 = ______GH
// (b0 % 4) << 4 = __GH____
// b1 = 12345678
// b1 >> 4 = ____1234
// n1 = __GH1234
let n1 : number = ((b0 % 4) << 4) + (b1 >> 4);
// n2 = __5678AB
// b1 = 12345678
// 16 = ___1____
// b1 % 16 = ____5678
// (b1 % 16) << 2 = __5678__
// n2 = __5678__
let n2 : number = (b1 % 16) << 2;
// convert to chars