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Fix some cases in string comparision (#66)

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This commit is contained in:
Max Graey
2018-04-05 18:44:17 +03:00
committed by Daniel Wirtz
parent 26601dcfb1
commit 70a0123554
5 changed files with 125 additions and 128 deletions
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31
std/assembly/string.ts
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@ -63,9 +63,7 @@ export class String {
changetype<usize>(this) + ((<usize>pos + 1) << 1),
HEADER_SIZE
);
if (second < 0xDC00 || second > 0xDFFF) {
return first;
}
if (second < 0xDC00 || second > 0xDFFF) return first;
return ((first - 0xD800) << 10) + (second - 0xDC00) + 0x10000;
}
@ -83,16 +81,19 @@ export class String {
var outLen: usize = thisLen + otherLen;
if (outLen == 0) return EMPTY;
var out = allocate(outLen);
move_memory(
changetype<usize>(out) + HEADER_SIZE,
changetype<usize>(this) + HEADER_SIZE,
thisLen << 1
);
move_memory(
changetype<usize>(out) + HEADER_SIZE + (thisLen << 1),
changetype<usize>(other) + HEADER_SIZE,
otherLen << 1
);
return out;
}
@ -102,9 +103,7 @@ export class String {
var end: isize = <isize>min(max(endPosition, 0), this.length);
var searchLength: isize = searchString.length;
var start: isize = end - searchLength;
if (start < 0) {
return false;
}
if (start < 0) return false;
return !compare_memory(
changetype<usize>(this) + HEADER_SIZE + (start << 1),
changetype<usize>(searchString) + HEADER_SIZE,
@ -116,8 +115,10 @@ export class String {
private static __eq(left: String, right: String): bool {
if (left === null) return right === null;
else if (right === null) return false;
var leftLength = left.length;
if (leftLength != right.length) return false;
return !compare_memory(
changetype<usize>(left) + HEADER_SIZE,
changetype<usize>(right) + HEADER_SIZE,
@ -132,9 +133,7 @@ export class String {
@operator(">")
private static __gt(left: String, right: String): bool {
if (!changetype<usize>(left) || !changetype<usize>(right)) {
return false;
}
if (left === null || right === null) return false;
var leftLength = left.length;
var rightLength = right.length;
@ -152,9 +151,8 @@ export class String {
@operator(">=")
private static __gte(left: String, right: String): bool {
if (!changetype<usize>(left) || !changetype<usize>(right)) {
return false;
}
if (left === null) return right === null;
else if (right === null) return false;
var leftLength = left.length;
var rightLength = right.length;
@ -172,9 +170,7 @@ export class String {
@operator("<")
private static __lt(left: String, right: String): bool {
if (!changetype<usize>(left) || !changetype<usize>(right)) {
return false;
}
if (left === null || right === null) return false;
var leftLength = left.length;
var rightLength = right.length;
@ -192,9 +188,8 @@ export class String {
@operator("<=")
private static __lte(left: String, right: String): bool {
if (!changetype<usize>(left) || !changetype<usize>(right)) {
return false;
}
if (left === null) return right === null;
else if (right === null) return false;
var leftLength = left.length;
var rightLength = right.length;