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Implement POC JSON parser (only works with subset of strings)

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This commit is contained in:
Vladimir Grichina
2019-01-06 01:18:00 -08:00
parent e8084bc708
commit 4cbc72c739
3 changed files with 135 additions and 110 deletions
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41
tests/assembly/decoder.spec.as.ts
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@@ -1,11 +1,11 @@
import "allocator/arena";
import { BSONDecoder, BSONHandler } from "../../assembly/decoder";
import { JSONDecoder, JSONHandler } from "../../assembly/decoder";
declare function logStr(str: string): void;
declare function logF64(val: f64): void;
class BSONTestHandler extends BSONHandler {
class JSONTestHandler extends JSONHandler {
isFirstKey: boolean = true
inObject: Array<boolean> = [false]
result: string = ""
@@ -72,7 +72,9 @@ class BSONTestHandler extends BSONHandler {
private writeString(str: string): void {
// TODO: Implement encoding
this.write('"');
this.write(str);
this.write('"');
}
private writeBoolean(value: bool): void {
@@ -92,28 +94,39 @@ class BSONTestHandler extends BSONHandler {
export class StringConversionTests {
private static handler : BSONTestHandler = new BSONTestHandler();
private static handler : JSONTestHandler = new JSONTestHandler();
static setUp(): void {
this.handler = new BSONTestHandler();
this.handler = new JSONTestHandler();
}
static createDecoder(): BSONDecoder<BSONTestHandler> {
return new BSONDecoder(this.handler);
static createDecoder(): JSONDecoder<JSONTestHandler> {
return new JSONDecoder(this.handler);
}
static shouldHandleEmptyObject(): bool {
this.handler.pushObject(null);
this.createDecoder().deserialize(hex2bin("0500000000"));
this.handler.popObject();
return this.handler.result == "{}";
return this.roundripTest("{}");
}
static shouldHandleInt32(): bool {
this.handler.pushObject(null);
this.createDecoder().deserialize(hex2bin("0e00000010696e74003412000000"));
this.handler.popObject();
return this.handler.result == "{int:4660}"
return this.roundripTest('{"int":4660}');
}
static shouldHandleString(): bool {
return this.roundripTest('{"str":"foo"}');
}
private static roundripTest(jsonString: string): bool {
let buffer: Uint8Array = new Uint8Array(jsonString.lengthUTF8);
let utf8ptr = jsonString.toUTF8();
// TODO: std should expose memcpy?
for (let i = 0; i < buffer.length; i++) {
buffer[i] = load<u8>(utf8ptr + i);
}
this.createDecoder().deserialize(buffer);
assert(this.handler.result == jsonString,
"Expected:\n" + jsonString + "\n" + "Actual:\n" + this.handler.result);
return true;
}
}