125 lines
4.2 KiB
Scheme
125 lines
4.2 KiB
Scheme
;;; -*-scheme-*-
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;;; GNU Mes --- Maxwell Equations of Software
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;;; Copyright © 2016,2017,2018,2019 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
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;;;
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;;; This file is part of GNU Mes.
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;;;
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;;; GNU Mes 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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;;; GNU Mes 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
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;;; GNU 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 GNU Mes. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;;; Code:
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(mes-use-module (srfi srfi-13))
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(define-macro (cond-expand-provide . rest) #t)
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(mes-use-module (mes catch))
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(mes-use-module (mes posix))
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(mes-use-module (srfi srfi-16))
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(mes-use-module (mes display))
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(mes-use-module (mes simple-format))
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(define %load-path (or (and=> (getenv "GUILE_LOAD_PATH") (lambda (x) (string-split x #\:))) '()))
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(define (drain-input port) (read-string))
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(define (read-line . rest)
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(let* ((port (if (pair? rest) (car rest) (current-input-port)))
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(handle-delim (if (and (pair? rest) (pair? (cdr rest))) (cadr rest) 'trim))
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(c (read-char port)))
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(if (eof-object? c) c
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(list->string
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(let loop ((c c))
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(if (or (eof-object? c) (eq? c #\newline)) (case handle-delim
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((trim) '())
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((concat) '(#\newline))
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(else (error (format #f "not supported: handle-delim=~a" handle-delim))))
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(cons c (loop (read-char port)))))))))
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(define (object->string x . rest)
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(with-output-to-string
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(lambda () ((if (pair? rest) (car rest) write) x))))
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(define (port-filename p) "<stdin>")
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(define (port-line p) 0)
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(define (with-input-from-string string thunk)
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(let ((prev (set-current-input-port (open-input-string string)))
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(r (thunk)))
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(set-current-input-port prev)
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r))
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(define (with-input-from-file file thunk)
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(let ((port (open-input-file file)))
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(if (= port -1)
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(error 'no-such-file file)
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(let* ((save (current-input-port))
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(foo (set-current-input-port port))
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(r (thunk)))
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(set-current-input-port save)
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r))))
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(define (with-output-to-file file thunk)
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(let ((port (open-output-file file)))
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(if (= port -1)
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(error 'cannot-open file)
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(let* ((save (current-output-port))
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(foo (set-current-output-port port))
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(r (thunk)))
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(set-current-output-port save)
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r))))
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(define (with-error-to-file file thunk)
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(let ((port (open-output-file file)))
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(if (= port -1)
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(error 'cannot-open file)
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(let* ((save (current-error-port))
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(foo (set-current-error-port port))
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(r (thunk)))
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(set-current-error-port save)
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r))))
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(define (with-output-to-port port thunk)
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(let* ((save (current-output-port))
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(foo (set-current-output-port port))
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(r (thunk)))
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(set-current-output-port save)
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r))
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(define core:open-input-file open-input-file)
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(define (open-input-file file)
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(let ((port (core:open-input-file file))
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(debug (and=> (getenv "MES_DEBUG") string->number)))
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(when (and debug (> debug 1))
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(core:display-error (string-append "open-input-file: `" file "'"))
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(when (> debug 3)
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(core:display-error " port=")
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(core:display-error port))
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(core:display-error "\n"))
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port))
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(define (dirname file-name)
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(let* ((lst (string-split file-name #\/))
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(lst (filter (negate string-null?) lst)))
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(if (null? lst) (if (string-prefix? "/" file-name) "/" ".")
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(let ((dir (string-join (list-head lst (1- (length lst))) "/")))
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(if (string-prefix? "/" file-name) (string-append "/" dir)
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(if (string-null? dir) "."
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dir))))))
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(define (file-exists? o)
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(access? o R_OK))
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