Merge pull request #7 from pmp-p/patch-2

maybe fix fd_seek #6
konsumer · Nov 14, 2024 · c6fb1c6 · c6fb1c6
2 parents fc8838f + 4b892dc
commit c6fb1c6
Showing 1 changed file with 22 additions and 20 deletions.
diff --git a/docs/easywasi.js b/docs/easywasi.js
@@ -384,34 +384,36 @@ export class WasiPreview1 {
     if (!fileDesc) return defs.ERRNO_BADF
     if (fileDesc.type === 'stdio') return defs.ERRNO_SPIPE
 
+    var stats = null
+    let newPosition = 0
+    let noffset = Number(offset)
+
     try {
-      const stats = this.fs.statSync(fileDesc.handle.path)
-      const size = stats.size
-      let newPosition
+      stats = this.fs.statSync(fileDesc.handle.path)
+    } catch (e) {
+      return defs.ERRNO_IO
+    }
 
-      switch (whence) {
-        case defs.WHENCE_SET:
-          newPosition = offset
+    switch (whence) {
+      case defs.WHENCE_SET:
+          newPosition = noffset
           break
-        case defs.WHENCE_CUR:
-          newPosition = fileDesc.handle.position + offset
+      case defs.WHENCE_CUR:
+          newPosition = Number(fileDesc.handle.position) + noffset
           break
-        case defs.WHENCE_END:
-          newPosition = size + offset
+      case defs.WHENCE_END:
+          newPosition = Number(stats.size) + noffset
           break
-        default:
+      default:
           return defs.ERRNO_INVAL
-      }
+    }
 
-      // Update position
-      fileDesc.handle.position = newPosition
+    // Update position
+    fileDesc.handle.position = newPosition
 
-      const view = new DataView(this.wasm.memory.buffer)
-      view.setBigUint64(newOffsetPtr, BigInt(newPosition), true)
-      return defs.ERRNO_SUCCESS
-    } catch (e) {
-      return defs.ERRNO_IO
-    }
+    const view = new DataView(this.wasm.memory.buffer)
+    view.setBigUint64(newOffsetPtr, BigInt(newPosition), true)
+    return defs.ERRNO_SUCCESS
   }
 
   fd_write (fd, iovs, iovsLen, nwrittenPtr) {