180 lines
6.1 KiB
Scheme
180 lines
6.1 KiB
Scheme
;;; Ikarus Scheme -- A compiler for R6RS Scheme.
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;;; Copyright (C) 2006,2007 Abdulaziz Ghuloum
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;;;
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;;; This program is free software: you can redistribute it and/or modify
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;;; it under the terms of the GNU General Public License version 3 as
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;;; published by the Free Software Foundation.
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;;;
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;;; This program is distributed in the hope that it will be useful, but
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;;; WITHOUT ANY WARRANTY; without even the implied warranty of
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;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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;;; General Public License for more details.
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;;;
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;;; You should have received a copy of the GNU General Public License
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;;; along with this program. If not, see <http://www.gnu.org/licenses/>.
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(library (ikarus io-ports)
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(export make-input-port make-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)
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make-input-port make-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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;;; 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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;;;
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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-buffer port)
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;;; (port-index port)
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;;; (port-size port)
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;;;
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;;; * Mutators:
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;;; (set-port-index! port fixnum)
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;;; (set-port-size! port fixnum)
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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 ($bytevector-length buffer))))
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;;;
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(define make-input-port
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(lambda (handler buffer)
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(if (procedure? handler)
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(if (bytevector? buffer)
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($make-input-port handler buffer)
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(error 'make-input-port "not a bytevector" buffer))
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(error 'make-input-port "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 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 "not a bytevector" buffer))
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(error 'make-output-port "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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($port-handler x)
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(error 'port-handler "not a port" x))))
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;;;
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(define port-input-buffer
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(lambda (x)
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(if (input-port? x)
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($port-buffer x)
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(error 'port-input-buffer "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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($port-index x)
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(error 'port-input-index "not an input-port" x))))
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;;;
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(define port-input-size
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(lambda (x)
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(if (input-port? x)
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($port-size x)
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(error 'port-input-size "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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($port-buffer x)
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(error 'port-output-buffer "not an output-port" x))))
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;;;
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(define port-output-index
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(lambda (x)
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(if (output-port? x)
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($port-index x)
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(error 'port-output-index "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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($port-size x)
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(error 'port-output-size "not an output-port" x))))
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;;;
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(define set-port-input-index!
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(lambda (p i)
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(if (input-port? p)
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(if (fixnum? i)
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(if ($fx>= i 0)
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(if ($fx<= i ($port-size p))
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($set-port-index! p i)
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(error 'set-port-input-index! "index is too big" i))
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(error 'set-port-input-index! "index is negative" i))
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(error 'set-port-input-index! "not a valid index" i))
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(error 'set-port-input-index! "not an input-port" p))))
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;;;
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(define set-port-input-size!
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(lambda (p i)
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(if (input-port? p)
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(if (fixnum? i)
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(if ($fx>= i 0)
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(if ($fx<= i ($bytevector-length ($port-buffer p)))
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(begin
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($set-port-index! p 0)
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($set-port-size! p i))
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(error 'set-port-input-size! "size is too big" i))
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(error 'set-port-input-size! "size is negative" i))
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(error 'set-port-input-size! "not a valid size" i))
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(error 'set-port-input-size! "not an input-port" p))))
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;;;
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(define set-port-output-index!
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(lambda (p i)
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(if (output-port? p)
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(if (fixnum? i)
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(if ($fx>= i 0)
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(if ($fx<= i ($port-size p))
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($set-port-index! p i)
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(error 'set-port-output-index! "index is too big" i))
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(error 'set-port-output-index! "index is negative" i))
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(error 'set-port-output-index! "not a valid index" i))
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(error 'set-port-output-index! "not an output-port" p))))
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;;;
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(define set-port-output-size!
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(lambda (p i)
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(if (output-port? p)
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(if (fixnum? i)
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(if ($fx>= i 0)
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(if ($fx<= i ($bytevector-length ($port-buffer p)))
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(begin
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($set-port-index! p 0)
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($set-port-size! p i))
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(error 'set-port-output-size! "size is too big" i))
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(error 'set-port-output-size! "size is negative" i))
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(error 'set-port-output-size! "not a valid size" i))
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(error 'set-port-output-size! "not an output-port" p)))))
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