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110 lines
3.0 KiB
EmacsLisp
110 lines
3.0 KiB
EmacsLisp
;;; rng-util.el --- utility functions for RELAX NG library
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;; Copyright (C) 2003, 2007-2020 Free Software Foundation, Inc.
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;; Author: James Clark
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;; Keywords: wp, hypermedia, languages, XML, RelaxNG
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it 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
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;; (at your option) any later version.
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;; GNU Emacs 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
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
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;;; Commentary:
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;;; Code:
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(defun rng-make-datatypes-uri (uri)
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(if (string-equal uri "")
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;; The spec doesn't say to do this, but it's perfectly conformant
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;; and better than using nil, I think.
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'http://relaxng.org/ns/structure/1.0
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(intern uri)))
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(defconst rng-xsd-datatypes-uri
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(rng-make-datatypes-uri "http://www.w3.org/2001/XMLSchema-datatypes"))
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(defconst rng-builtin-datatypes-uri (rng-make-datatypes-uri ""))
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(defun rng-uniquify-eq (list)
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"Destructively remove `eq' duplicates from LIST."
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(and list
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(let ((head list))
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(while (cdr head)
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(if (eq (car head) (cadr head))
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(setcdr head (cddr head)))
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(setq head (cdr head)))
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list)))
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(defun rng-uniquify-equal (list)
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"Destructively remove `equal' duplicates from LIST."
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(and list
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(let ((head list))
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(while (cdr head)
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(if (equal (car head) (cadr head))
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(setcdr head (cddr head)))
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(setq head (cdr head)))
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list)))
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(defun rng-blank-p (str) (string-match "\\`[ \t\n\r]*\\'" str))
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(defun rng-substq (new old list)
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"Replace first member of LIST (if any) that is `eq' to OLD by NEW.
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LIST is not modified."
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(cond ((null list) nil)
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((eq (car list) old)
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(cons new (cdr list)))
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(t
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(let ((tail (cons (car list)
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nil))
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(rest (cdr list)))
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(setq list tail)
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(while rest
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(let ((item (car rest)))
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(setq rest (cdr rest))
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(cond ((eq item old)
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(setcdr tail
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(cons new rest))
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(setq rest nil))
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(t
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(setq tail
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(setcdr tail
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(cons item nil))))))))
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list)))
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(defun rng-escape-string (s)
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(replace-regexp-in-string "[&\"<>]"
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(lambda (match)
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(cdr (assoc match
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'(("&" . "&")
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("\"" . """)
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(">" . ">")
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("<" . "<")))))
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s
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t))
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(defun rng-collapse-space (string)
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(setq string
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(replace-regexp-in-string "[ \t\r\n]+" " " string t t))
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(when (string-match "\\` " string)
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(setq string (substring string 1)))
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(when (string-match " \\'" string)
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(setq string (substring string 0 -1)))
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string)
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(define-error 'rng-error nil)
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(provide 'rng-util)
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;;; rng-util.el ends here
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