From a68c1975bda47b0698b48761a62e95b371095e9a Mon Sep 17 00:00:00 2001
From: Werner Koch <wk@gnupg.org>
Date: Fri, 21 Aug 2020 21:11:21 +0200
Subject: core,w32: Add UTF-8 support to gpgrt_fopen, gpgrt_mkdir and
 gpgrt_chdir.

* src/protos.h: New.
* src/Makefile.am (libgpg_error_la_SOURCES): Add file.
* src/gpgrt-int.h: Include protos.h.
* src/sysutils.c (_gpgrt_mkdir) [W32]: Make UTF-8 aware.
(_gpgrt_chdir) [W32]: Ditto.
* src/w32-gettext.c: Include protos.h.
(utf8_to_wchar): Allow for strings.
(_gpgrt_utf8_to_wchar): New.
(_gpgrt_free_wchar): New.
* src/estream.c (map_w32_to_errno): Add more error codes.
(_gpgrt_w32_set_errno): New.
(any8bitchar) [W32]: New helper.
(func_file_create) [W32]: Convert file name and use _wopen.
--

GnuPG-bug-id: 4083
Signed-off-by: Werner Koch <wk@gnupg.org>
---
 src/w32-gettext.c | 39 ++++++++++++++++++++++++++++++++++-----
 1 file changed, 34 insertions(+), 5 deletions(-)

(limited to 'src/w32-gettext.c')

diff --git a/src/w32-gettext.c b/src/w32-gettext.c
index 11e4f3d..a734ef2 100644
--- a/src/w32-gettext.c
+++ b/src/w32-gettext.c
@@ -52,6 +52,7 @@
 
 #include "init.h"
 #include "gpg-error.h"
+#include "protos.h"
 
 /* Override values initialized by gpgrt_w32_override_locale.  If NAME
  * is not the empty string LANGID will be used.  */
@@ -1354,15 +1355,23 @@ load_domain (const char *filename)
 /* Return a malloced wide char string from an UTF-8 encoded input
    string STRING.  Caller must free this value. On failure returns
    NULL.  The result of calling this function with STRING set to NULL
-   is not defined. */
+   is not defined.  If LENGTH is zero and RETLEN NULL the fucntion
+   assumes that STRING is a nul-terminated string and returns a
+   (wchar_t)0-terminated string.  */
 static wchar_t *
 utf8_to_wchar (const char *string, size_t length, size_t *retlen)
 {
   int n;
   wchar_t *result;
   size_t nbytes;
+  int cbmultibyte;
+
+  if (!length && !retlen)
+    cbmultibyte = -1;
+  else
+    cbmultibyte = length;
 
-  n = MultiByteToWideChar (CP_UTF8, 0, string, length, NULL, 0);
+  n = MultiByteToWideChar (CP_UTF8, 0, string, cbmultibyte, NULL, 0);
   if (n < 0 || (n+1) <= 0)
     return NULL;
 
@@ -1376,17 +1385,38 @@ utf8_to_wchar (const char *string, size_t length, size_t *retlen)
   if (!result)
     return NULL;
 
-  n = MultiByteToWideChar (CP_UTF8, 0, string, length, result, n);
+  n = MultiByteToWideChar (CP_UTF8, 0, string, cbmultibyte, result, n);
   if (n < 0)
     {
       jnlib_free (result);
       return NULL;
     }
-  *retlen = n;
+  if (retlen)
+    *retlen = n;
   return result;
 }
 
 
+/* Convert an UTF8 string to a WCHAR string.  Caller should use
+ * _gpgrt_free_wchar to release the result. */
+wchar_t *
+_gpgrt_utf8_to_wchar (const char *string)
+{
+  return utf8_to_wchar (string, 0, NULL);
+}
+
+
+/* We provide a dedicated release function to be sure that we don't
+ * use a somehow mapped free function but the one which matches the
+ * used alloc.  */
+void
+_gpgrt_free_wchar (wchar_t *wstring)
+{
+  if (wstring)
+    jnlib_free (wstring);
+}
+
+
 /* Return a malloced string encoded in the native console codepage
    from the wide char input string STRING.
    Caller must free this value. On failure returns NULL.
@@ -1445,7 +1475,6 @@ utf8_to_native (const char *string, size_t length, size_t *retlen)
 }
 
 
-
 
 /* Specify that the DOMAINNAME message catalog will be found
    in DIRNAME rather than in the system locale data base.  */
-- 
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