byteutils.go

package byteutils

func ReadAvailableBytesToBuffer(target []byte, targetOffset int, source []byte, sourceOffset int, sourceLength int) int {
    availableBytes := sourceLength - sourceOffset
    requiredBytes := len(target) - targetOffset

    var bytesToRead int
    if availableBytes < requiredBytes {
        bytesToRead = availableBytes
    } else {
        bytesToRead = requiredBytes
    }

    copy(target[targetOffset:], source[sourceOffset:sourceOffset + bytesToRead])

    return bytesToRead
}