continue // copy out and return
			}
			if ndst == 0 && d.err == nil {
				// Special case: input buffer is mostly filled with non-data bytes.
				// Filter out such bytes to make room for more input.
				off := 0
				for i := 0; i < d.nbuf; i++ {
					if d.buf[i] > ' ' {
						d.buf[off] = d.buf[i]
						off++
					}
				}
				d.nbuf = off
			}
		}

	// sample rate, at a cost of 1 MiB.
	profBufWordCount = 1 << 17
	// profBufTagCount is the size of the CPU profile buffer's storage for the
	// goroutine tags associated with each sample. A capacity of 1<<14 means
	// room for 16k samples, or 160 thread-seconds at a 100 Hz sample rate.
	profBufTagCount = 1 << 14
)

type cpuProfile struct {
	lock mutex
	on   bool     // profiling is on
	log  *profBuf // profile events written here

	// The biggest risk is having a write barrier in the debug call
	// injection test code fire, because it runs in a signal handler
	// and may not have a P.
	//
	// We use 8 Ps so there's room for the debug call worker,
	// something that's trying to preempt the call worker, and the
	// goroutine that's trying to stop the call worker.
	ogomaxprocs := runtime.GOMAXPROCS(8)
	ogcpercent := debug.SetGCPercent(-1)

func (e traceEventWriter) end() {
	e.w.end()
}

// traceEventWrite is the part of traceEvent that actually writes the event.
func (w traceWriter) event(ev traceEv, args ...traceArg) traceWriter {
	// Make sure we have room.
	w, _ = w.ensure(1 + (len(args)+1)*traceBytesPerNumber)

	// Compute the timestamp diff that we'll put in the trace.
	ts := traceClockNow()
	if ts <= w.traceBuf.lastTime {
		ts = w.traceBuf.lastTime + 1
	}

	m := strings.Split(u, "/")[0]
	buf := bytes.NewBuffer(nil)
	for _, r := range m {
		// Ignore non-printable characters
		if !unicode.IsPrint(r) {
			continue
		}
		// Only append if we have room for it
		if buf.Len()+utf8.RuneLen(r) > validation.FieldManagerMaxLength {
			break
		}
		buf.WriteRune(r)
	}
	return buf.String()

	// written right-to-left from the end of the buffer before being copied
	// to the start of the buffer.
	// It is flushed when it contains >= 1<<maxWidth bytes,
	// so that there is always room to decode an entire code.
	output [2 * 1 << maxWidth]byte
	o      int    // write index into output
	toRead []byte // bytes to return from Read
}

// readLSB returns the next code for "Least Significant Bits first" data.

	// Now all coefficients fit into 64-bit registers but are still too large to
	// be passed around as an Element. We therefore do one last carry chain,
	// where the carries will be small enough to fit in the wiggle room above 2⁵¹.
	*v = Element{rr0, rr1, rr2, rr3, rr4}
	v.carryPropagate()
}

func feSquareGeneric(v, a *Element) {
	l0 := a.l0
	l1 := a.l1
	l2 := a.l2
	l3 := a.l3
	l4 := a.l4

  void MaybeFetch(const Key& key, const std::shared_ptr<Block>& block,
                  TF_Status* status) ABSL_LOCKS_EXCLUDED(mu_);

  /// Trim the block cache to make room for another entry.
  void Trim() ABSL_EXCLUSIVE_LOCKS_REQUIRED(mu_);

  /// Update the LRU iterator for the block at `key`.
  void UpdateLRU(const Key& key, const std::shared_ptr<Block>& block,

	b = b[:end+(n*2)]
	// Copy the block of bytes we want to duplicate to the end of the
	// slice
	copy(b[end+n:], b[src:src+n])
	// Shift the bytes after the splice point n positions to the right
	// to make room for the new block
	copy(b[dst+n:end+n], b[dst:end])
	// Insert the duplicate block into the splice point
	copy(b[dst:], b[end+n:])
	b = b[:end+n]
	return b
}

func Join(sep string, fields ...string) string {
	return strings.Join(fields, sep)
}

// Insert inserts the values v... into s at index i,
// returning the modified slice.
// The elements at s[i:] are shifted up to make room.
// In the returned slice r, r[i] == v[0],
// and r[i+len(v)] == value originally at r[i].
// Insert panics if i is out of range.
// This function is O(len(s) + len(v)).
func Insert[S ~[]E, E any](s S, i int, v ...E) S {