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package srtp
import "bytes"
// Grow the buffer size to the given number of bytes.
func growBufferSize(buf []byte, size int) []byte {
if size <= cap(buf) {
return buf[:size]
}
buf2 := make([]byte, size)
copy(buf2, buf)
return buf2
}
// Check if buffers match, if not allocate a new buffer and return it
func allocateIfMismatch(dst, src []byte) []byte {
if dst == nil {
dst = make([]byte, len(src))
copy(dst, src)
} else if !bytes.Equal(dst, src) { // bytes.Equal returns on ref equality, no optimization needed
extraNeeded := len(src) - len(dst)
if extraNeeded > 0 {
dst = append(dst, make([]byte, extraNeeded)...)
} else if extraNeeded < 0 {
dst = dst[:len(dst)+extraNeeded]
}
copy(dst, src)
}
return dst
}
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