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37710f7e8f
* libguile/srfi-1.c: * libguile/srfi-1.h: * libguile/srfi-60.c: * libguile/srfi-60.h: * libguile/ChangeLog-srfi: Move here, from the srfi/ dir. The C API is internal. Add API to register the extensions, called by init.c. * libguile/init.c: Verily, register srfi extensions. * libguile/Makefile.am: Add srfi files. * module/srfi/srfi-1.scm: * module/srfi/srfi-60.scm: Update load-extension invocation. * Makefile.am: * configure.ac: Remove srfi/ dir. * test-suite/standalone/Makefile.am: * test-suite/standalone/test-srfi-1.c: Remove srfi-1 C test, we don't support this API any more.
73 lines
2.1 KiB
Scheme
73 lines
2.1 KiB
Scheme
;;; srfi-60.scm --- Integers as Bits
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;; Copyright (C) 2005, 2006, 2010 Free Software Foundation, Inc.
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;;
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;; This library is free software; you can redistribute it and/or
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;; modify it under the terms of the GNU Lesser General Public
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;; License as published by the Free Software Foundation; either
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;; version 3 of the License, or (at your option) any later version.
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;;
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;; This library is distributed in the hope that it will be useful,
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;; but 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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;; Lesser General Public License for more details.
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;;
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;; You should have received a copy of the GNU Lesser General Public
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;; License along with this library; if not, write to the Free Software
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;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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(define-module (srfi srfi-60)
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#:export (bitwise-and
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bitwise-ior
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bitwise-xor
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bitwise-not
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any-bits-set?
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bitwise-if bitwise-merge
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log2-binary-factors first-set-bit
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bit-set?
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copy-bit
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bit-field
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copy-bit-field
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arithmetic-shift
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rotate-bit-field
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reverse-bit-field
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integer->list
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list->integer
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booleans->integer)
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#:replace (bit-count)
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#:re-export (logand
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logior
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logxor
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integer-length
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logtest
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logcount
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logbit?
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ash))
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(load-extension (string-append "libguile-" (effective-version))
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"scm_init_srfi_60")
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(define bitwise-and logand)
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(define bitwise-ior logior)
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(define bitwise-xor logxor)
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(define bitwise-not lognot)
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(define any-bits-set? logtest)
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(define bit-count logcount)
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(define (bitwise-if mask n0 n1)
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(logior (logand mask n0)
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(logand (lognot mask) n1)))
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(define bitwise-merge bitwise-if)
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(define first-set-bit log2-binary-factors)
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(define bit-set? logbit?)
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(define bit-field bit-extract)
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(define (copy-bit-field n newbits start end)
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(logxor n (ash (logxor (bit-extract n start end) ;; cancel old
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(bit-extract newbits 0 (- end start))) ;; insert new
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start)))
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(define arithmetic-shift ash)
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(cond-expand-provide (current-module) '(srfi-60))
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