fixed wasm (LaserKaspar/go-wasm-pdfcpu), migrated to vite in backend, dynamic operators on frontend

446742b7de

shared-operations/src/wasm/pdfcpu/wasm_exec_memfs.js

@@ -0,0 +1,37 @@
+import memfs from 'memfs';
+
+globalThis.fs = memfs.fs;
+
+import "./wasm_exec.js";
+
+const encoder = new TextEncoder("utf-8");
+const decoder = new TextDecoder("utf-8");
+let outputBuf = "";
+
+globalThis.fs.writeSyncOriginal = globalThis.fs.writeSync;
+globalThis.fs.writeSync = function(fd, buf) {
+    if (fd === 1 || fd === 2) {
+        outputBuf += decoder.decode(buf);
+        const nl = outputBuf.lastIndexOf("\n");
+        if (nl != -1) {
+            console.log(outputBuf.substr(0, nl));
+            outputBuf = outputBuf.substr(nl + 1);
+        }
+        return buf.length;
+    } else {
+        return globalThis.fs.writeSyncOriginal(...arguments);
+    }
+};
+
+globalThis.fs.writeOriginal = globalThis.fs.write;
+globalThis.fs.write = function(fd, buf, offset, length, position, callback) {
+    if (fd === 1 || fd === 2) {
+        if (offset !== 0 || length !== buf.length || position !== null) {
+            throw new Error("fs func not implemented");
+        }
+        const n = this.writeSync(fd, buf);
+        callback(null, n, buf);
+    } else {
+        return globalThis.fs.writeOriginal(...arguments);
+    }
+};