the current input pointer
the buffer containing the file
return byte at offset 'pos'
extract a character at position bp from buf
extract a double at position bp from buf
extract a float at position bp from buf
extract an integer at position bp from buf
extract a long integer at position bp from buf
read a byte
read some bytes
read a character
read a double
read a float
read an integer
read a long
read an UTF8 encoded string
skip next 'n' bytes