This function too is buggy on Solaris and Tru64: It may return 0 instead of a
positive
number or an error indicator. Workaround implemented as follows:
2008-12-21 Bruno Haible <br...@clisp.org>
Work around a wcrtomb() bug on Solaris 10 and OSF/1 5.1.
* lib/wchar.in.h (wcrtomb): Override if REPLACE_WCRTOMB is set.
* m4/wcrtomb.m4 (gl_FUNC_WCRTOMB): Test the return value of wcrtomb
with NULL destination argument in various locales. Set REPLACE_WCRTOMB
if not correct.
* m4/wchar.m4 (gl_WCHAR_H_DEFAULTS): Initialize REPLACE_WCRTOMB.
* modules/wchar (Makefile.am): Substitute REPLACE_WCRTOMB.
* modules/wcrtomb (Files): Add m4/locale-fr.m4, m4/locale-ja.m4,
m4/locale-zh.m4, m4/codeset.m4.
* doc/posix-functions/wcrtomb.texi: Document the bug.
--- lib/wchar.in.h.orig 2008-12-21 21:52:26.000000000 +0100
+++ lib/wchar.in.h 2008-12-21 21:31:43.000000000 +0100
@@ -207,7 +207,11 @@
/* Convert a wide character to a multibyte character. */
#if @GNULIB_WCRTOMB@
-# if !...@have_wcrtomb@
+# if @REPLACE_WCRTOMB@
+# undef wcrtomb
+# define wcrtomb rpl_wcrtomb
+# endif
+# if !...@have_wcrtomb@ || @REPLACE_WCRTOMB@
extern size_t wcrtomb (char *s, wchar_t wc, mbstate_t *ps);
# endif
#elif defined GNULIB_POSIXCHECK
--- m4/wcrtomb.m4.orig 2008-12-21 21:52:26.000000000 +0100
+++ m4/wcrtomb.m4 2008-12-21 21:45:27.000000000 +0100
@@ -1,4 +1,4 @@
-# wcrtomb.m4 serial 1
+# wcrtomb.m4 serial 2
dnl Copyright (C) 2008 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
@@ -12,6 +12,70 @@
AC_CHECK_FUNCS_ONCE([wcrtomb])
if test $ac_cv_func_wcrtomb = no; then
HAVE_WCRTOMB=0
+ else
+
+ dnl On OSF/1 5.1 and Solaris 10, wcrtomb (NULL, 0, NULL) sometimes
+ dnl returns 0 instead of 1.
+ AC_REQUIRE([AC_PROG_CC])
+ AC_REQUIRE([gt_LOCALE_FR])
+ AC_REQUIRE([gt_LOCALE_FR_UTF8])
+ AC_REQUIRE([gt_LOCALE_JA])
+ AC_REQUIRE([gt_LOCALE_ZH_CN])
+ AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+ AC_CACHE_CHECK([whether wcrtomb return value is correct],
+ [gl_cv_func_wcrtomb_retval],
+ [
+ dnl Initial guess, used when cross-compiling or when no suitable locale
+ dnl is present.
+changequote(,)dnl
+ case "$host_os" in
+ # Guess no on OSF/1 and Solaris.
+ osf* | solaris*) gl_cv_func_wcrtomb_retval="guessing no" ;;
+ # Guess yes otherwise.
+ *) gl_cv_func_wcrtomb_retval="guessing yes" ;;
+ esac
+changequote([,])dnl
+ if test $LOCALE_FR != none || test $LOCALE_FR_UTF8 != none || test
$LOCALE_JA != none || test $LOCALE_ZH_CN != none; then
+ AC_TRY_RUN([
+#include <locale.h>
+#include <stdio.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+ if (setlocale (LC_ALL, "$LOCALE_FR") != NULL)
+ {
+ if (wcrtomb (NULL, 0, NULL) != 1)
+ return 1;
+ }
+ if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL)
+ {
+ if (wcrtomb (NULL, 0, NULL) != 1)
+ return 1;
+ }
+ if (setlocale (LC_ALL, "$LOCALE_JA") != NULL)
+ {
+ if (wcrtomb (NULL, 0, NULL) != 1)
+ return 1;
+ }
+ if (setlocale (LC_ALL, "$LOCALE_ZH_CN") != NULL)
+ {
+ if (wcrtomb (NULL, 0, NULL) != 1)
+ return 1;
+ }
+ return 0;
+}],
+ [gl_cv_func_wcrtomb_retval=yes],
+ [gl_cv_func_wcrtomb_retval=no],
+ [])
+ fi
+ ])
+ case "$gl_cv_func_wcrtomb_retval" in
+ *yes) ;;
+ *) REPLACE_WCRTOMB=1 ;;
+ esac
+ fi
+ if test $HAVE_WCRTOMB = 0 || test $REPLACE_WCRTOMB = 1; then
gl_REPLACE_WCHAR_H
AC_LIBOBJ([wcrtomb])
gl_PREREQ_WCRTOMB
--- m4/wchar.m4.orig 2008-12-21 21:52:26.000000000 +0100
+++ m4/wchar.m4 2008-12-21 21:32:29.000000000 +0100
@@ -7,7 +7,7 @@
dnl Written by Eric Blake.
-# wchar.m4 serial 18
+# wchar.m4 serial 19
AC_DEFUN([gl_WCHAR_H],
[
@@ -87,6 +87,7 @@
REPLACE_MBRTOWC=0; AC_SUBST([REPLACE_MBRTOWC])
REPLACE_MBSRTOWCS=0; AC_SUBST([REPLACE_MBSRTOWCS])
REPLACE_MBSNRTOWCS=0;AC_SUBST([REPLACE_MBSNRTOWCS])
+ REPLACE_WCRTOMB=0; AC_SUBST([REPLACE_WCRTOMB])
REPLACE_WCWIDTH=0; AC_SUBST([REPLACE_WCWIDTH])
WCHAR_H=''; AC_SUBST([WCHAR_H])
])
--- modules/wchar.orig 2008-12-21 21:52:26.000000000 +0100
+++ modules/wchar 2008-12-21 21:32:46.000000000 +0100
@@ -51,6 +51,7 @@
-e 's|@''REPLACE_MBRTOWC''@|$(REPLACE_MBRTOWC)|g' \
-e 's|@''REPLACE_MBSRTOWCS''@|$(REPLACE_MBSRTOWCS)|g' \
-e 's|@''REPLACE_MBSNRTOWCS''@|$(REPLACE_MBSNRTOWCS)|g' \
+ -e 's|@''REPLACE_WCRTOMB''@|$(REPLACE_WCRTOMB)|g' \
-e 's|@''REPLACE_WCWIDTH''@|$(REPLACE_WCWIDTH)|g' \
-e '/definition of GL_LINK_WARNING/r $(LINK_WARNING_H)' \
< $(srcdir)/wchar.in.h; \
--- modules/wcrtomb.orig 2008-12-21 21:52:26.000000000 +0100
+++ modules/wcrtomb 2008-12-21 21:37:47.000000000 +0100
@@ -5,6 +5,10 @@
lib/wcrtomb.c
m4/wcrtomb.m4
m4/mbstate_t.m4
+m4/locale-fr.m4
+m4/locale-ja.m4
+m4/locale-zh.m4
+m4/codeset.m4
Depends-on:
wchar
--- doc/posix-functions/wcrtomb.texi.orig 2008-12-21 21:52:26.000000000
+0100
+++ doc/posix-functions/wcrtomb.texi 2008-12-21 21:49:51.000000000 +0100
@@ -11,6 +11,9 @@
@item
This function is missing on some platforms:
HP-UX 11.00, IRIX 6.5, Solaris 2.6, mingw, Interix 3.5.
+...@item
+This function returns 0 when the first argument is NULL in some locales on
some platforms:
+OSF/1 5.1, Solaris 10.
@end itemize
Portability problems not fixed by Gnulib:
