fix(all): impl. new apis to make sure safety

pbuf/buffer.go

@@ -2,7 +2,6 @@ package pbuf
 
 import (
 	"bytes"
-	"unsafe"
 
 	"github.com/fumiama/orbyte"
 )
@@ -21,54 +20,3 @@ func (bufferPool BufferPool) InvolveBuffer(buf *bytes.Buffer) *orbyte.Item[bytes
 func (bufferPool BufferPool) ParseBuffer(buf *bytes.Buffer) *orbyte.Item[bytes.Buffer] {
 	return bufferPool.p.Parse(buf.Len(), buf)
 }
-
-// A Buffer is a variable-sized buffer of bytes with Read and Write methods.
-// The zero value for Buffer is an empty buffer ready to use.
-type buffer struct {
-	buf      []byte // contents are the bytes buf[off : len(buf)]
-	off      int    // read at &buf[off], write at &buf[len(buf)]
-	lastRead readOp // last read operation, so that Unread* can work correctly.
-}
-
-func skip(w *bytes.Buffer, n int) {
-	if n == 0 {
-		return
-	}
-	b := (*buffer)(unsafe.Pointer(w))
-	b.lastRead = opInvalid
-	if len(b.buf) <= b.off {
-		// Buffer is empty, reset to recover space.
-		w.Reset()
-		return
-	}
-	n = minnum(n, len(b.buf[b.off:]))
-	b.off += n
-	if n > 0 {
-		b.lastRead = opRead
-	}
-}
-
-// The readOp constants describe the last action performed on
-// the buffer, so that UnreadRune and UnreadByte can check for
-// invalid usage. opReadRuneX constants are chosen such that
-// converted to int they correspond to the rune size that was read.
-type readOp int8
-
-// Don't use iota for these, as the values need to correspond with the
-// names and comments, which is easier to see when being explicit.
-const (
-	opRead      readOp = -1 // Any other read operation.
-	opInvalid   readOp = 0  // Non-read operation.
-	opReadRune1 readOp = 1  // Read rune of size 1.
-	opReadRune2 readOp = 2  // Read rune of size 2.
-	opReadRune3 readOp = 3  // Read rune of size 3.
-	opReadRune4 readOp = 4  // Read rune of size 4.
-)
-
-// minnum 返回两数最小值，该函数将被内联
-func minnum[T int | int8 | uint8 | int16 | uint16 | int32 | uint32 | int64 | uint64](a, b T) T {
-	if a > b {
-		return b
-	}
-	return a
-}