cache2: support sized flag

Author: abextm

cache2-ts/src/Cache.ts

@@ -47,6 +47,8 @@ export class ArchiveData {
 	public namehash!: number;
 	public revision!: number;
 	public crc!: number;
+	public decompressedSize?: number;
+	public compressedSize?: number;
 
 	/**@internal*/ files: Map<number, ArchiveFile> = new Map();
 

cache2-ts/src/DiskCache.ts

@@ -8,6 +8,7 @@ export class DiskIndexData implements IndexData {
 	public compression!: number;
 	public crc!: number;
 	public named!: boolean;
+	public sized!: boolean;
 	/** @internal */ archives: Map<number, ArchiveData> = new Map();
 }
 
@@ -43,6 +44,11 @@ export class DiskCacheProvider implements CacheProvider {
 
 					let flags = r.u8();
 					let named = out.named = !!(flags & 1);
+					let sized = out.sized = !!(flags & 4);
+
+					if (flags & ~(1 | 4)) {
+						throw new Error(`unsupported flags ${flags.toString(16)}`);
+					}
 
 					let numArchives = protocol <= 6 ? r.u16() : r.u32o16();
 					let ams: ArchiveData[] = new Array(numArchives);
@@ -61,6 +67,12 @@ export class DiskCacheProvider implements CacheProvider {
 					for (let am of ams) {
 						am.crc = r.i32();
 					}
+					if (sized) {
+						for (let am of ams) {
+							am.compressedSize = r.i32();
+							am.decompressedSize = r.i32();
+						}
+					}
 					for (let am of ams) {
 						am.revision = r.i32();
 					}