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unshiftify padEnd

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dcode
2019-03-11 01:16:05 +01:00
parent f076826e59
commit ce82e5458e
3 changed files with 133 additions and 161 deletions
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31
std/assembly/string.ts
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@ -329,24 +329,23 @@ export class String extends StringBase {
padEnd(targetLength: i32, padString: String = changetype<String>(" ")): String {
assert(this !== null);
var length = this.length;
var padLen = padString.length;
if (targetLength < length || !padLen) return this;
var len = targetLength - length;
var out = ALLOC(targetLength << 1);
if (length) {
memory.copy(out, changetype<usize>(this), <usize>length << 1);
}
if (len > padLen) {
let count = (len - 1) / padLen;
let base = count * padLen;
let rest = len - base;
memory.repeat(out + (<usize>length << 1), changetype<usize>(padString), <usize>padString.length << 1, count);
if (rest) {
memory.copy(out + ((<usize>base + <usize>length) << 1), changetype<usize>(padString), <usize>rest << 1);
var thisSize = <usize>this.length << 1;
var targetSize = <usize>targetLength << 1;
var padSize = <usize>padString.length << 1;
if (targetSize < thisSize || !padSize) return this;
var appendSize = targetSize - thisSize;
var out = ALLOC(targetSize);
memory.copy(out, changetype<usize>(this), thisSize);
if (appendSize > padSize) {
let repeatCount = (appendSize - 2) / padSize;
let restBase = repeatCount * padSize;
let restSize = appendSize - restBase;
memory.repeat(out + thisSize, changetype<usize>(padString), padSize, repeatCount);
if (restSize) {
memory.copy(out + thisSize + restBase, changetype<usize>(padString), restSize);
}
} else {
memory.copy(out + (<usize>length << 1), changetype<usize>(padString), <usize>len << 1);
memory.copy(out + thisSize, changetype<usize>(padString), appendSize);
}
return REGISTER<String>(out);
}