commit

node_modules/strtok3/lib/FileTokenizer.js

@@ -0,0 +1,50 @@
+import { AbstractTokenizer } from './AbstractTokenizer.js';
+import { EndOfStreamError } from 'peek-readable';
+import * as fs from './FsPromise.js';
+export class FileTokenizer extends AbstractTokenizer {
+    constructor(fd, fileInfo) {
+        super(fileInfo);
+        this.fd = fd;
+    }
+    /**
+     * Read buffer from file
+     * @param uint8Array - Uint8Array to write result to
+     * @param options - Read behaviour options
+     * @returns Promise number of bytes read
+     */
+    async readBuffer(uint8Array, options) {
+        const normOptions = this.normalizeOptions(uint8Array, options);
+        this.position = normOptions.position;
+        const res = await fs.read(this.fd, uint8Array, normOptions.offset, normOptions.length, normOptions.position);
+        this.position += res.bytesRead;
+        if (res.bytesRead < normOptions.length && (!options || !options.mayBeLess)) {
+            throw new EndOfStreamError();
+        }
+        return res.bytesRead;
+    }
+    /**
+     * Peek buffer from file
+     * @param uint8Array - Uint8Array (or Buffer) to write data to
+     * @param options - Read behaviour options
+     * @returns Promise number of bytes read
+     */
+    async peekBuffer(uint8Array, options) {
+        const normOptions = this.normalizeOptions(uint8Array, options);
+        const res = await fs.read(this.fd, uint8Array, normOptions.offset, normOptions.length, normOptions.position);
+        if ((!normOptions.mayBeLess) && res.bytesRead < normOptions.length) {
+            throw new EndOfStreamError();
+        }
+        return res.bytesRead;
+    }
+    async close() {
+        return fs.close(this.fd);
+    }
+}
+export async function fromFile(sourceFilePath) {
+    const stat = await fs.stat(sourceFilePath);
+    if (!stat.isFile) {
+        throw new Error(`File not a file: ${sourceFilePath}`);
+    }
+    const fd = await fs.open(sourceFilePath, 'r');
+    return new FileTokenizer(fd, { path: sourceFilePath, size: stat.size });
+}