Merge tag 'upstream/0.9.7'

Upstream version 0.9.7

1 files changed, 56 insertions, 8 deletions

diff --git a/gnulib-m4/mbrtowc.m4 b/gnulib-m4/mbrtowc.m4
index c0d751d..5edf08b 100644
--- a/gnulib-m4/mbrtowc.m4
+++ b/gnulib-m4/mbrtowc.m4
@@ -1,5 +1,5 @@
-# mbrtowc.m4 serial 26
-dnl Copyright (C) 2001-2002, 2004-2005, 2008-2015 Free Software Foundation,
+# mbrtowc.m4 serial 27  -*- coding: utf-8 -*-
+dnl Copyright (C) 2001-2002, 2004-2005, 2008-2016 Free Software Foundation,
 dnl Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -40,6 +40,7 @@ AC_DEFUN([gl_FUNC_MBRTOWC],
       gl_MBRTOWC_RETVAL
       gl_MBRTOWC_NUL_RETVAL
       gl_MBRTOWC_EMPTY_INPUT
+      gl_MBRTOWC_C_LOCALE
       case "$gl_cv_func_mbrtowc_null_arg1" in
         *yes) ;;
         *) AC_DEFINE([MBRTOWC_NULL_ARG1_BUG], [1],
@@ -76,6 +77,13 @@ AC_DEFUN([gl_FUNC_MBRTOWC],
            REPLACE_MBRTOWC=1
            ;;
       esac
+      case $gl_cv_C_locale_sans_EILSEQ in
+        *yes) ;;
+        *) AC_DEFINE([C_LOCALE_MAYBE_EILSEQ], [1],
+             [Define to 1 if the C locale may have encoding errors.])
+           REPLACE_MBRTOWC=1
+           ;;
+      esac
     fi
   fi
 ])
@@ -156,7 +164,7 @@ int main ()
       memset (&state, '\0', sizeof (mbstate_t));
       if (mbrtowc (&wc, input + 1, 1, &state) == (size_t)(-2))
         if (mbsinit (&state))
-          return 1;
+          return 2;
     }
   return 0;
 }]])],
@@ -216,7 +224,7 @@ int main ()
       memset (&state, '\0', sizeof (mbstate_t));
       if (mbrtowc (&wc, input + 3, 6, &state) != 4
           && mbtowc (&wc, input + 3, 6) == 4)
-        return 1;
+        return 2;
     }
   return 0;
 }]])],
@@ -344,7 +352,7 @@ int main ()
       mbrtowc (&wc, NULL, 5, &state);
       /* Check that wc was not modified.  */
       if (wc != (wchar_t) 0xBADFACE)
-        return 1;
+        return 2;
     }
   return 0;
 }]])],
@@ -531,7 +539,7 @@ int main ()
 
       memset (&state, '\0', sizeof (mbstate_t));
       if (mbrtowc (&wc, "", 1, &state) != 0)
-        return 1;
+        return 2;
     }
   return 0;
 }]])],
@@ -569,14 +577,54 @@ changequote([,])dnl
            int
            main (void)
            {
-             return mbrtowc (&wc, "", 0, &mbs) == (size_t) -2;
+             return mbrtowc (&wc, "", 0, &mbs) != (size_t) -2;
            }]])],
-        [gl_cv_func_mbrtowc_empty_input=no],
         [gl_cv_func_mbrtowc_empty_input=yes],
+        [gl_cv_func_mbrtowc_empty_input=no],
         [:])
     ])
 ])
 
+dnl Test whether mbrtowc reports encoding errors in the C locale.
+dnl Although POSIX was never intended to allow this, the GNU C Library
+dnl and other implementations do it.  See:
+dnl https://sourceware.org/bugzilla/show_bug.cgi?id=19932
+
+AC_DEFUN([gl_MBRTOWC_C_LOCALE],
+[
+  AC_CACHE_CHECK([whether the C locale is free of encoding errors],
+    [gl_cv_C_locale_sans_EILSEQ],
+    [
+     dnl Initial guess, used when cross-compiling or when no suitable locale
+     dnl is present.
+     gl_cv_C_locale_sans_EILSEQ="guessing no"
+
+     AC_RUN_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[#include <limits.h>
+            #include <locale.h>
+            #include <wchar.h>
+          ]], [[
+            int i;
+            char *locale = setlocale (LC_ALL, "C");
+            if (! locale)
+              return 2;
+            for (i = CHAR_MIN; i <= CHAR_MAX; i++)
+              {
+                char c = i;
+                wchar_t wc;
+                mbstate_t mbs = { 0, };
+                size_t ss = mbrtowc (&wc, &c, 1, &mbs);
+                if (1 < ss)
+                  return 3;
+              }
+            return 0;
+          ]])],
+      [gl_cv_C_locale_sans_EILSEQ=yes],
+      [gl_cv_C_locale_sans_EILSEQ=no],
+      [:])])
+])
+
 # Prerequisites of lib/mbrtowc.c.
 AC_DEFUN([gl_PREREQ_MBRTOWC], [
   :