Initial commit (by create-cloudflare CLI)

node_modules/blake3-wasm/esm/base/hash-reader.js

@@ -0,0 +1,67 @@
+/**
+ * The maximum number of bytes that can be read from the hash.
+ *
+ * Calculated out 2^64-1, since `Xn` syntax (for `Xn ** Yn`) requires TS
+ * targeting esnext/es2020 which includes features that Node 10 doesn't
+ * yet supported.
+ */
+export const maxHashBytes = BigInt('18446744073709551615');
+/**
+ * Base hash reader implementation.
+ */
+export class BaseHashReader {
+    constructor(reader) {
+        this.pos = BigInt(0);
+        this.reader = reader;
+    }
+    get position() {
+        return this.pos;
+    }
+    set position(value) {
+        var _a;
+        // to avoid footguns of people using numbers:
+        if (typeof value !== 'bigint') {
+            throw new Error(`Got a ${typeof value} set in to reader.position, expected a bigint`);
+        }
+        this.boundsCheck(value);
+        this.pos = value;
+        (_a = this.reader) === null || _a === void 0 ? void 0 : _a.set_position(value);
+    }
+    /**
+     * @inheritdoc
+     */
+    readInto(target) {
+        if (!this.reader) {
+            throw new Error(`Cannot read from a hash after it was disposed`);
+        }
+        const next = this.pos + BigInt(target.length);
+        this.boundsCheck(next);
+        this.reader.fill(target);
+        this.position = next;
+    }
+    /**
+     * @inheritdoc
+     */
+    read(bytes) {
+        const data = this.alloc(bytes);
+        this.readInto(data);
+        return data;
+    }
+    /**
+     * @inheritdoc
+     */
+    dispose() {
+        var _a, _b;
+        (_b = (_a = this.reader) === null || _a === void 0 ? void 0 : _a.free) === null || _b === void 0 ? void 0 : _b.call(_a);
+        this.reader = undefined;
+    }
+    boundsCheck(position) {
+        if (position > maxHashBytes) {
+            throw new RangeError(`Cannot read past ${maxHashBytes} bytes in BLAKE3 hashes`);
+        }
+        if (position < BigInt(0)) {
+            throw new RangeError(`Cannot read to a negative position`);
+        }
+    }
+}
+//# sourceMappingURL=hash-reader.js.map