update dependencies (#296)

vendor/codeberg.org/gruf/go-bytes/buffer.go

@@ -0,0 +1,131 @@
+package bytes
+
+import (
+	"unicode/utf8"
+)
+
+// Buffer is a very simple buffer implementation that allows
+// access to and reslicing of the underlying byte slice.
+type Buffer struct {
+	B []byte
+}
+
+func NewBuffer(b []byte) Buffer {
+	return Buffer{
+		B: b,
+	}
+}
+
+func (b *Buffer) Write(p []byte) (int, error) {
+	b.Grow(len(p))
+	return copy(b.B[b.Len()-len(p):], p), nil
+}
+
+func (b *Buffer) WriteString(s string) (int, error) {
+	b.Grow(len(s))
+	return copy(b.B[b.Len()-len(s):], s), nil
+}
+
+func (b *Buffer) WriteByte(c byte) error {
+	l := b.Len()
+	b.Grow(1)
+	b.B[l] = c
+	return nil
+}
+
+func (b *Buffer) WriteRune(r rune) (int, error) {
+	if r < utf8.RuneSelf {
+		b.WriteByte(byte(r))
+		return 1, nil
+	}
+
+	l := b.Len()
+	b.Grow(utf8.UTFMax)
+	n := utf8.EncodeRune(b.B[l:b.Len()], r)
+	b.B = b.B[:l+n]
+
+	return n, nil
+}
+
+func (b *Buffer) WriteAt(p []byte, start int64) (int, error) {
+	b.Grow(len(p) - int(int64(b.Len())-start))
+	return copy(b.B[start:], p), nil
+}
+
+func (b *Buffer) WriteStringAt(s string, start int64) (int, error) {
+	b.Grow(len(s) - int(int64(b.Len())-start))
+	return copy(b.B[start:], s), nil
+}
+
+func (b *Buffer) Truncate(size int) {
+	b.B = b.B[:b.Len()-size]
+}
+
+func (b *Buffer) ShiftByte(index int) {
+	copy(b.B[index:], b.B[index+1:])
+}
+
+func (b *Buffer) Shift(start int64, size int) {
+	copy(b.B[start:], b.B[start+int64(size):])
+}
+
+func (b *Buffer) DeleteByte(index int) {
+	b.ShiftByte(index)
+	b.Truncate(1)
+}
+
+func (b *Buffer) Delete(start int64, size int) {
+	b.Shift(start, size)
+	b.Truncate(size)
+}
+
+func (b *Buffer) InsertByte(index int64, c byte) {
+	l := b.Len()
+	b.Grow(1)
+	copy(b.B[index+1:], b.B[index:l])
+	b.B[index] = c
+}
+
+func (b *Buffer) Insert(index int64, p []byte) {
+	l := b.Len()
+	b.Grow(len(p))
+	copy(b.B[index+int64(len(p)):], b.B[index:l])
+	copy(b.B[index:], p)
+}
+
+func (b *Buffer) Bytes() []byte {
+	return b.B
+}
+
+func (b *Buffer) String() string {
+	return string(b.B)
+}
+
+func (b *Buffer) StringPtr() string {
+	return BytesToString(b.B)
+}
+
+func (b *Buffer) Cap() int {
+	return cap(b.B)
+}
+
+func (b *Buffer) Len() int {
+	return len(b.B)
+}
+
+func (b *Buffer) Reset() {
+	b.B = b.B[:0]
+}
+
+func (b *Buffer) Grow(size int) {
+	b.Guarantee(size)
+	b.B = b.B[:b.Len()+size]
+}
+
+func (b *Buffer) Guarantee(size int) {
+	if size > b.Cap()-b.Len() {
+		nb := make([]byte, 2*b.Cap()+size)
+		copy(nb, b.B)
+		b.B = nb[:b.Len()]
+	}
+}