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Fix default fromIndex in String#lastIndexOf (#165)

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This commit is contained in:
Max Graey
2018-07-13 14:30:48 +03:00
committed by Daniel Wirtz
parent cd14b296ce
commit 5ce57a6434
4 changed files with 935 additions and 726 deletions
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6
std/assembly/string.ts
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@ -229,17 +229,17 @@ export class String {
return -1;
}
lastIndexOf(searchString: String, fromIndex: i32 = 0): i32 {
lastIndexOf(searchString: String, fromIndex: i32 = i32.MAX_VALUE): i32 {
assert(this !== null);
if (searchString === null) searchString = changetype<String>("null");
var len: isize = this.length;
var searchLen: isize = searchString.length;
if (!searchLen) return len;
if (!len) return -1;
var start = clamp<isize>(fromIndex - searchLen, 0, len);
var start = clamp<isize>(fromIndex, 0, len - searchLen);
// TODO: multiple char codes
for (let k: isize = len - 1; k >= start; --k) {
for (let k = start; k >= 0; --k) {
if (!compare_memory(
changetype<usize>(this) + HEADER_SIZE + (k << 1),
changetype<usize>(searchString) + HEADER_SIZE,