/usr/share/gauche-0.9/0.9.4/lib/rfc/zlib.scm is in gauche-zlib 0.9.4-3.
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;;; Gauche-zlib - zlib module
;;;
;;; Copyright (c) 2006 Rui Ueyama, All rights reserved.
;;;
;;; Redistribution and use in source and binary forms, with or without
;;; modification, are permitted provided that the following conditions
;;; are met:
;;;
;;; 1. Redistributions of source code must retain the above copyright
;;; notice, this list of conditions and the following disclaimer.
;;;
;;; 2. Redistributions in binary form must reproduce the above copyright
;;; notice, this list of conditions and the following disclaimer in the
;;; documentation and/or other materials provided with the distribution.
;;;
;;; 3. Neither the name of the authors nor the names of its contributors
;;; may be used to endorse or promote products derived from this
;;; software without specific prior written permission.
;;;
;;; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
;;; "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
;;; LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
;;; A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
;;; OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
;;; SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
;;; TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
;;; PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
;;; LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
;;; NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
;;; SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
;;;
#!no-fold-case
(define-module rfc.zlib
(use gauche.uvector)
(export zlib-version adler32 crc32
open-deflating-port open-inflating-port
deflate-string inflate-string
<zlib-error> <zlib-need-dict-error>
<zlib-stream-error> <zlib-data-error>
<zlib-memory-error> <zlib-version-error>
<deflating-port> <inflating-port>
deflating-port-full-flush
zstream-total-in zstream-total-out
zstream-params-set!
zstream-adler32
zstream-data-type
zstream-dictionary-adler32
gzip-encode-string gzip-decode-string
inflate-sync
Z_NO_COMPRESSION Z_BEST_SPEED
Z_BEST_COMPRESSION Z_DEFAULT_COMPRESSION
Z_FILTERED Z_HUFFMAN_ONLY
Z_RLE Z_DEFAULT_STRATEGY
Z_BINARY Z_ASCII Z_UNKNOWN
))
(select-module rfc.zlib)
(dynamic-load "rfc--zlib")
(export-if-defined Z_TEXT Z_FIXED)
;; body
(define (open-deflating-port source
:key (compression-level Z_DEFAULT_COMPRESSION)
(window-bits 15)
(memory-level 8)
(strategy Z_DEFAULT_STRATEGY)
(dictionary #f)
(buffer-size 0)
(owner? #f))
(%open-deflating-port source compression-level
window-bits memory-level
strategy dictionary
buffer-size owner?))
;; utility procedures
(define (deflate-string str . args)
(call-with-output-string
(^p (let1 p2 (apply open-deflating-port p args)
(display str p2)
(close-output-port p2)))))
(define (inflate-string str . args)
(port->string (apply open-inflating-port (open-input-string str) args)))
(define (gzip-encode-string str . args)
(call-with-output-string
(^p (let1 p2 (apply open-deflating-port p :window-bits (+ 15 16) args)
(display str p2)
(close-output-port p2)))))
(define (gzip-decode-string str . args)
(port->string (apply open-inflating-port
(open-input-string str)
:window-bits (+ 15 16)
args)))
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