82 lines
2.5 KiB
Scheme
82 lines
2.5 KiB
Scheme
;;; Gash --- Guile As SHell
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;;; Copyright © 2016, 2017 Ludovic Courtès <ludo@gnu.org>
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;;; Copyright © 2016 Efraim Flashner <efraim@flashner.co.il>
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;;; Copyright © 2017 Ricardo Wurmus <rekado@elephly.net>
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;;; Copyright © 2018 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
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;;;
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;;; This file is part of Gash.
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;;;
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;;; Gash is free software; you can redistribute it and/or modify it
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;;; under the terms of the GNU General Public License as published by
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;;; the Free Software Foundation; either version 3 of the License, or (at
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;;; your option) any later version.
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;;;
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;;; Gash is distributed in the hope that it will be useful, but WITHOUT ANY
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;;; WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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;;; FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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;;; 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 Gash. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;;; The initial bournish.scm was taken from Guix.
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;;; Code:
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(define-module (gash commands wc)
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#:use-module (srfi srfi-1)
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#:use-module (srfi srfi-11)
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#:use-module (ice-9 match)
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#:use-module (gash shell-utils)
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#:export (
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wc
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))
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(define (lines+chars port)
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"Return the number of lines and number of chars read from PORT."
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(let loop ((lines 0) (chars 0))
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(match (read-char port)
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((? eof-object?) ;done!
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(values lines chars))
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(#\newline ;recurse
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(loop (1+ lines) (1+ chars)))
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(_ ;recurse
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(loop lines (1+ chars))))))
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(define (wc-print file)
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(let-values (((lines chars)
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(call-with-input-file file lines+chars)))
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(format #t "~a ~a ~a~%" lines chars file)))
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(define (wc-l-print file)
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(let-values (((lines chars)
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(call-with-input-file file lines+chars)))
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(format #t "~a ~a~%" lines file)))
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(define (wc-c-print file)
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(let-values (((lines chars)
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(call-with-input-file file lines+chars)))
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(format #t "~a ~a~%" chars file)))
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(define (wc- . files)
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(for-each wc-print (filter file-exists?* files)))
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(define (wc-l . files)
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(for-each wc-l-print (filter file-exists?* files)))
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(define (wc-c . files)
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(for-each wc-c-print (filter file-exists?* files)))
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(define (wc name . args)
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(cond ((member "-l" args)
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(apply wc-l (delete "-l" args)))
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((member "-c" args)
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(apply wc-c (delete "-c" args)))
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(else
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(apply wc- args))))
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(define main wc)
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