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Allow decoding of UTF-8 containing U+FFFD, the replacement character.

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* libguile/strings.c (scm_from_utf8_stringn): Use 'u8_mbtoucr' and check
  for a decoding error by its 'nbytes' return value.  Previously we used
  'u8_mbtouc' and improperly assumed that a U+FFFD character indicated a
  decoding error.
* libguile/symbols.c (utf8_string_equals_wide_string): Likewise.
* test-suite/tests/bytevectors.test (exception:decoding-error): New
  variable.
  ("2.9 Operations on Strings"): Add tests.
This commit is contained in:
Mark H Weaver 2015-08-13 01:31:36 -04:00
parent 48412395c6
commit 00884bb79f
3 changed files with 21 additions and 8 deletions
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14
test-suite/tests/bytevectors.test
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@ -1,6 +1,6 @@
;;;; bytevectors.test --- R6RS bytevectors. -*- mode: scheme; coding: utf-8; -*-
;;;;
;;;; Copyright (C) 2009-2014 Free Software Foundation, Inc.
;;;; Copyright (C) 2009-2015 Free Software Foundation, Inc.
;;;;
;;;; Ludovic Courtès
;;;;
@ -24,6 +24,9 @@
:use-module (rnrs bytevectors)
:use-module (srfi srfi-4))
(define exception:decoding-error
(cons 'decoding-error "input (locale conversion|decoding) error"))
;;; Some of the tests in here are examples taken from the R6RS Standard
;;; Libraries document.
@ -501,6 +504,15 @@
(= (string-length str)
(- (bytevector-length utf8) 2)))))
(pass-if-equal "utf8->string [replacement character]"
'(104 105 65533)
(map char->integer
(string->list (utf8->string #vu8(104 105 239 191 189)))))
(pass-if-exception "utf8->string [invalid encoding]"
exception:decoding-error
(utf8->string #vu8(104 105 239 191 50)))
(pass-if "utf16->string"
(let* ((utf16 (uint-list->bytevector (map char->integer
(string->list "hello, world"))