[pschweitzer] 69682: [CRT] Import _mbstowcs_l() from Wine and call it in mbstowcs(). This fixes crashes when calling the msvcrt, crtdll implementation of mbstowcs() with no output string. Thus, it ...

Author: pschweitzer
Date: Sun Oct 25 08:36:14 2015
New Revision: 69682
URL: http://svn.reactos.org/svn/reactos?rev=69682&view=rev
Log:
[CRT]
Import _mbstowcs_l() from Wine and call it in mbstowcs().
This fixes crashes when calling the msvcrt, crtdll implementation of mbstowcs() with no
output string.
Thus, it fixes a few crashing apitests
The NTDLL version is still broken in some way, need to investigate why.
CORE-10390 #resolve #comment Fixed with 69682. Thanks for the report!
Modified:
    trunk/reactos/lib/sdk/crt/stdlib/mbstowcs.c
Modified: trunk/reactos/lib/sdk/crt/stdlib/mbstowcs.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/lib/sdk/crt/stdlib/mbstowc…
==============================================================================
--- trunk/reactos/lib/sdk/crt/stdlib/mbstowcs.c [iso-8859-1] (original)
+++ trunk/reactos/lib/sdk/crt/stdlib/mbstowcs.c [iso-8859-1] Sun Oct 25 08:36:14 2015
@@ -1,28 +1,43 @@
 #include <precomp.h>
+/*********************************************************************
+ * _mbstowcs_l
+ */
+size_t CDECL _mbstowcs_l(wchar_t *wcstr, const char *mbstr,
+        size_t count, _locale_t locale)
+{
+    MSVCRT_pthreadlocinfo locinfo;
+    size_t i, size;
+
+    if(!locale)
+        locinfo = get_locinfo();
+    else
+        locinfo = ((MSVCRT__locale_t)locale)->locinfo;
+
+    /* Ignore count parameter */
+    if(!wcstr)
+        return MultiByteToWideChar(locinfo->lc_codepage, 0, mbstr, -1, NULL, 0)-1;
+
+    for(i=0, size=0; i<count; i++) {
+        if(mbstr[size] == '\0')
+            break;
+
+        size += (_isleadbyte_l((unsigned char)mbstr[size], locale) ? 2 : 1);
+    }
+
+    size = MultiByteToWideChar(locinfo->lc_codepage, 0,
+            mbstr, size, wcstr, count);
+
+    if(size<count && wcstr)
+        wcstr[size] = '\0';
+
+    return size;
+}
 /*
  * @implemented
  */
 size_t mbstowcs (wchar_t *widechar, const char *multibyte, size_t number)
 {
-    int bytes;
-    size_t n = 0;
-
-    while (n < number) {
-
-       if ((bytes = mbtowc (widechar, multibyte, MB_LEN_MAX)) < 0)
-           return (size_t) -1;
-
-       if (bytes == 0) {
-           *widechar = (wchar_t) '\0';
-           return n;
-       }
-
-       widechar++;
-       multibyte += bytes;
-       n++;
-    }
-
-    return n;
+    return _mbstowcs_l(widechar, multibyte, number, NULL);
 }