fixes #7347, asyncfile.getFileSize (#7354)

* fixes #7347 * fixes #7347
2018-03-17 22:21:22 +07:00 · 2018-03-17 22:21:22 +07:00 · 19164929ed
commit 19164929ed
parent 5ea80b43b1
3 changed files with 16 additions and 0 deletions
--- a/lib/pure/asyncfile.nim
+++ b/lib/pure/asyncfile.nim
@ -78,7 +78,10 @@ proc getFileSize*(f: AsyncFile): int64 =
      raiseOSError(osLastError())
    result = (high shl 32) or low
  else:
+    let curPos = lseek(f.fd.cint, 0, SEEK_CUR)
    result = lseek(f.fd.cint, 0, SEEK_END)
+    f.offset = lseek(f.fd.cint, curPos, SEEK_SET)
+    assert(f.offset == curPos)

 proc newAsyncFile*(fd: AsyncFd): AsyncFile =
  ## Creates `AsyncFile` with a previously opened file descriptor `fd`.
@ -281,6 +284,7 @@ proc read*(f: AsyncFile, size: int): Future[string] =
          result = false # We still want this callback to be called.
      elif res == 0:
        # EOF
+        f.offset = lseek(fd.cint, 0, SEEK_CUR)
        retFuture.complete("")
      else:
        readBuffer.setLen(res)