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+;;; condition.scm  --  Skribilo SRFI-35 error condition hierarchy.
+;;;
+;;; Copyright 2006  Ludovic Courtès  <ludovic.courtes@laas.fr>
+;;;
+;;;
+;;; This program is free software; you can redistribute it and/or modify
+;;; it under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 2 of the License, or
+;;; (at your option) any later version.
+;;;
+;;; This program is distributed in the hope that it will be useful,
+;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with this program; if not, write to the Free Software
+;;; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+;;; USA.
+
+(define-module (skribilo condition)
+  :autoload   (srfi srfi-34) (guard)
+  :use-module (srfi srfi-35)
+  :use-module (srfi srfi-39)
+  :export     (&skribilo-error skribilo-error?
+	       &invalid-argument-error invalid-argument-error?
+	       &file-error file-error?
+	       &file-search-error file-search-error?
+	       &file-open-error file-open-error?
+	       &file-write-error file-write-error?
+
+	       %call-with-skribilo-error-catch
+	       call-with-skribilo-error-catch))
+
+;;; Author:  Ludovic Courtès
+;;;
+;;; Commentary:
+;;;
+;;; Top-level of Skribilo's SRFI-35 error conditions.
+;;;
+;;; Code:
+
+
+;;;
+;;; Standard error conditions.
+;;;
+
+(define-condition-type &skribilo-error &error
+  skribilo-error?)
+
+
+;;;
+;;; Generic errors.
+;;;
+
+(define-condition-type &invalid-argument-error &skribilo-error
+  invalid-argument-error?
+  (proc-name invalid-argument-error:proc-name)
+  (argument  invalid-argument-error:argument))
+
+
+;;;
+;;; File errors.
+;;;
+
+(define-condition-type &file-error &skribilo-error
+  file-error?
+  (file-name file-error:file-name))
+
+(define-condition-type &file-search-error &file-error
+  file-search-error?
+  (path file-search-error:path))
+
+(define-condition-type &file-open-error &file-error
+  file-open-error?)
+
+(define-condition-type &file-write-error &file-error
+  file-write-error?)
+
+
+
+;;;
+;;; Convenience functions.
+;;;
+
+(define (%call-with-skribilo-error-catch thunk exit exit-val)
+  (guard (c ((invalid-argument-error? c)
+	     (format (current-error-port) "in `~a': invalid argument: ~S~%"
+		     (invalid-argument-error:proc-name c)
+		     (invalid-argument-error:argument c))
+	     (exit exit-val))
+
+	    ((file-search-error? c)
+	     (format (current-error-port) "~a: not found in path `~S'~%"
+		     (file-error:file-name c)
+		     (file-search-error:path c))
+	     (exit exit-val))
+
+	    ((file-open-error? c)
+	     (format (current-error-port) "~a: cannot open file~%"
+		     (file-error:file-name c))
+	     (exit exit-val))
+
+	    ((file-write-error? c)
+	     (format (current-error-port) "~a: cannot write to file~%"
+		     (file-error:file-name c))
+	     (exit exit-val))
+
+	    ((file-error? c)
+	     (format (current-error-port) "file error: ~a~%"
+		     (file-error:file-name c))
+	     (exit exit-val))
+
+	    ((skribilo-error? c)
+	     (format (current-error-port) "undefined skribilo error: ~S~%"
+		     c)
+	     (exit exit-val)))
+
+	 (thunk)))
+
+(define-macro (call-with-skribilo-error-catch thunk)
+  `(call/cc (lambda (cont)
+	      (%call-with-skribilo-error-catch ,thunk cont #f))))
+
+;;; arch-tag: 285010f9-06ea-4c39-82c2-6c3604f668b3
+
+;;; conditions.scm ends here