187 lines
6.9 KiB
Scheme
187 lines
6.9 KiB
Scheme
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(library (ikarus io-ports)
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(export make-input-port make-output-port make-input/output-port
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port-handler
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port-input-buffer port-output-buffer
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port-input-index set-port-input-index!
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port-input-size set-port-input-size!
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port-output-index set-port-output-index!
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port-output-size set-port-output-size!)
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(import
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(ikarus system $ports)
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(ikarus system $strings)
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(ikarus system $bytevectors)
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(ikarus system $fx)
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(except (ikarus) make-input-port make-output-port
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make-input/output-port port-handler
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port-input-buffer port-output-buffer
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port-input-index set-port-input-index!
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port-input-size set-port-input-size!
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port-output-index set-port-output-index!
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port-output-size set-port-output-size!))
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;;; GENERIC PORTS: BASIC PRIMITIVES
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;;;
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;;; Exports:
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;;; * Constructors:
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;;; (make-input-port handler input-buffer)
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;;; (make-output-port handler output-buffer)
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;;; (make-input/output-port handler input-buffer output-buffer)
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;;;
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;;; * Predicates:
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;;; (port? x)
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;;; (input-port? x)
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;;; (output-port? x)
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;;;
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;;; * Accessors:
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;;; (port-handler port)
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;;; (port-input-buffer port)
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;;; (port-input-index port)
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;;; (port-input-size port)
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;;; (port-output-buffer port)
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;;; (port-output-index port)
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;;; (port-output-size port)
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;;;
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;;; * Mutators:
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;;; (set-port-handler! port proc)
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;;; (set-port-input-buffer! port string)
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;;; (set-port-input-index! port fixnum)
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;;; (set-port-input-size! port fixnum)
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;;; (set-port-output-buffer! port string)
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;;; (set-port-output-index! port fixnum)
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;;; (set-port-output-size! port fixnum)
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;;;
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;;;
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(define $make-input-port
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(lambda (handler buffer)
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($make-port/input handler buffer 0 ($bytevector-length buffer) #f 0 0)))
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;;;
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(define make-input-port
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(lambda (handler buffer)
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(if (procedure? handler)
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(if (bytevector? buffer)
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($make-input-port handler buffer)
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(error 'make-input-port "~s is not a bytevector" buffer))
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(error 'make-input-port "~s is not a procedure" handler))))
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;;;
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(define $make-output-port
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(lambda (handler buffer)
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($make-port/output handler #f 0 0 buffer 0 ($bytevector-length buffer))))
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;;;
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(define make-output-port
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(lambda (handler buffer)
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(if (procedure? handler)
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(if (bytevector? buffer)
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($make-output-port handler buffer)
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(error 'make-output-port "~s is not a bytevector" buffer))
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(error 'make-output-port "~s is not a procedure" handler))))
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;;;
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(define $make-input/output-port
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(lambda (handler input-buffer output-buffer)
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($make-port/both handler
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input-buffer 0 ($bytevector-length input-buffer)
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output-buffer 0 ($bytevector-length output-buffer))))
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;;;
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(define make-input/output-port
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(lambda (handler input-buffer output-buffer)
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(if (procedure? handler)
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(if (bytevector? input-buffer)
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(if (bytevector? output-buffer)
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($make-input/output-port handler input-buffer output-buffer)
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(error 'make-input/output-port "~s is not a bytevector" output-buffer))
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(error 'make-input/output-port "~s is not a bytevector" input-buffer))
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(error 'make-input/output-port "~s is not a procedure" handler))))
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;;;
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(define port-handler
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(lambda (x)
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(if (port? x)
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($port-handler x)
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(error 'port-handler "~s is not a port" x))))
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;;;
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(define port-input-buffer
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(lambda (x)
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(if (input-port? x)
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($port-input-buffer x)
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(error 'port-input-buffer "~s is not an input-port" x))))
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;;;
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(define port-input-index
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(lambda (x)
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(if (input-port? x)
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($port-input-index x)
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(error 'port-input-index "~s is not an input-port" x))))
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;;;
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(define port-input-size
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(lambda (x)
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(if (input-port? x)
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($port-input-size x)
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(error 'port-input-size "~s is not an input-port" x))))
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;;;
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(define port-output-buffer
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(lambda (x)
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(if (output-port? x)
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($port-output-buffer x)
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(error 'port-output-buffer "~s is not an output-port" x))))
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;;;
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(define port-output-index
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(lambda (x)
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(if (output-port? x)
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($port-output-index x)
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(error 'port-output-index "~s is not an output-port" x))))
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;;;
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(define port-output-size
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(lambda (x)
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(if (output-port? x)
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($port-output-size x)
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(error 'port-output-size "~s is not an output-port" x))))
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;;;
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(define set-port-input-index!
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(lambda (p i)
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(if (input-port? p)
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(if (fixnum? i)
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(if ($fx>= i 0)
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(if ($fx<= i ($port-input-size p))
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($set-port-input-index! p i)
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(error 'set-port-input-index! "index ~s is too big" i))
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(error 'set-port-input-index! "index ~s is negative" i))
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(error 'set-port-input-index! "~s is not a valid index" i))
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(error 'set-port-input-index! "~s is not an input-port" p))))
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;;;
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(define set-port-input-size!
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(lambda (p i)
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(if (input-port? p)
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(if (fixnum? i)
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(if ($fx>= i 0)
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(if ($fx<= i ($bytevector-length ($port-input-buffer p)))
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(begin
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($set-port-input-index! p 0)
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($set-port-input-size! p i))
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(error 'set-port-input-size! "size ~s is too big" i))
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(error 'set-port-input-size! "size ~s is negative" i))
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(error 'set-port-input-size! "~s is not a valid size" i))
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(error 'set-port-input-size! "~s is not an input-port" p))))
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;;;
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(define set-port-output-index!
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(lambda (p i)
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(if (output-port? p)
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(if (fixnum? i)
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(if ($fx>= i 0)
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(if ($fx<= i ($port-output-size p))
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($set-port-output-index! p i)
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(error 'set-port-output-index! "index ~s is too big" i))
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(error 'set-port-output-index! "index ~s is negative" i))
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(error 'set-port-output-index! "~s is not a valid index" i))
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(error 'set-port-output-index! "~s is not an output-port" p))))
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;;;
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(define set-port-output-size!
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(lambda (p i)
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(if (output-port? p)
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(if (fixnum? i)
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(if ($fx>= i 0)
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(if ($fx<= i ($bytevector-length ($port-output-buffer p)))
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(begin
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($set-port-output-index! p 0)
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($set-port-output-size! p i))
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(error 'set-port-output-size! "size ~s is too big" i))
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(error 'set-port-output-size! "size ~s is negative" i))
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(error 'set-port-output-size! "~s is not a valid size" i))
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(error 'set-port-output-size! "~s is not an output-port" p)))))
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