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[Implement] Base64 #23

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[Implement] Base64 #23

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edace6b
[implement] rudimentary base64
jtenner Aug 22, 2019
64f296e
[fix] decode base64
jtenner Aug 22, 2019
b88e7b8
[implement] recursor for byteLength function
jtenner Aug 22, 2019
1d3ed2b
[Implement] most of encode
jtenner Aug 23, 2019
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[implement] recursor for byteLength function
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@jtenner
jtenner committed Aug 22, 2019
commit b88e7b8c1c0e4115125cc6de4cdc696f2f10fbeb
21 changes: 19 additions & 2 deletions assembly/buffer/index.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -388,14 +388,31 @@ export namespace Buffer {
}

export function byteLength(input: string): i32 {
let length = input.length;
if (length & 0b11) return -1;
length -= 2;
let char: u16;
for (let i = 0; i < length; i++) {
char = load<u16>(changetype<usize>(input) + (<usize>i << alignof<u16>()));
if (i32(char >= 0x41) & i32(char <= 0x5A)) continue;
else if (i32(char >= 0x61) & i32(char <= 0x7A)) continue;
else if (i32(char >= 0x31) & i32(char <= 0x39)) continue;
else if(i32(char == 0x2B) | i32(char == 0x2F)) continue;
return -1;
}
// check each char
char = load<u16>(changetype<usize>(input) + (<usize>length << alignof<u16>()), 2);

char = load<u16>(changetype<usize>(input) + (<usize>length << alignof<u16>()), 4);
return -1;
}

export function stringLength(buffer: ArrayBuffer): i32 {
return <i32>Math.ceil(<f32>buffer.byteLength / 3) << 2;
export function stringLength(byteLength: i32): i32 {
return (<i32>Math.floor(byteLength / 3) << 2) + select(4, 0, byteLength % 3 != 0);
}

export function encode(input: string): ArrayBuffer {

return new ArrayBuffer(0);
}

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