msvcrt: Implement _vscprintf and _vscwprintf.

dlls/msvcrt/msvcrt.spec

@@ -508,6 +508,8 @@
 @ cdecl _unloaddll(long)
 @ cdecl _unlock(long)
 @ cdecl _utime(str ptr)
+@ cdecl _vscprintf(str ptr)
+@ cdecl _vscwprintf(wstr ptr)
 @ cdecl _vsnprintf(ptr long str ptr) MSVCRT_vsnprintf
 @ cdecl _vsnwprintf(ptr long wstr ptr) MSVCRT_vsnwprintf
 @ cdecl _waccess(wstr long)

dlls/msvcrt/wcs.c

@@ -200,11 +200,11 @@ static inline int pf_output_stringW( pf_output *out, LPCWSTR str, int len )
 
         if( space >= len )
         {
-            memcpy( p, str, len*sizeof(WCHAR) );
+            if (out->buf.W) memcpy( p, str, len*sizeof(WCHAR) );
             out->used += len;
             return len;
         }
-        if( space > 0 )
+        if( space > 0 && out->buf.W )
             memcpy( p, str, space*sizeof(WCHAR) );
         out->used += len;
     }
@@ -215,11 +215,11 @@ static inline int pf_output_stringW( pf_output *out, LPCWSTR str, int len )
 
         if( space >= n )
         {
-            WideCharToMultiByte( CP_ACP, 0, str, len, p, n, NULL, NULL );
+            if (out->buf.A) WideCharToMultiByte( CP_ACP, 0, str, len, p, n, NULL, NULL );
             out->used += n;
             return len;
         }
-        if( space > 0 )
+        if( space > 0 && out->buf.A )
             WideCharToMultiByte( CP_ACP, 0, str, len, p, space, NULL, NULL );
         out->used += n;
     }
@@ -238,11 +238,11 @@ static inline int pf_output_stringA( pf_output *out, LPCSTR str, int len )
 
         if( space >= len )
         {
-            memcpy( p, str, len );
+            if (out->buf.A) memcpy( p, str, len );
             out->used += len;
             return len;
         }
-        if( space > 0 )
+        if( space > 0 && out->buf.A )
             memcpy( p, str, space );
         out->used += len;
     }
@@ -253,11 +253,11 @@ static inline int pf_output_stringA( pf_output *out, LPCSTR str, int len )
 
         if( space >= n )
         {
-            MultiByteToWideChar( CP_ACP, 0, str, len, p, n );
+            if (out->buf.W) MultiByteToWideChar( CP_ACP, 0, str, len, p, n );
             out->used += n;
             return len;
         }
-        if( space > 0 )
+        if( space > 0 && out->buf.W )
             MultiByteToWideChar( CP_ACP, 0, str, len, p, space );
         out->used += n;
     }
@@ -804,6 +804,14 @@ int CDECL MSVCRT_vsprintf( char *str, const char *format, __ms_va_list valist)
 }
 
 /*********************************************************************
+ *		_vscprintf (MSVCRT.@)
+ */
+int CDECL _vscprintf( const char *format, __ms_va_list valist )
+{
+    return MSVCRT_vsnprintf( NULL, INT_MAX, format, valist );
+}
+
+/*********************************************************************
  *		_snprintf (MSVCRT.@)
  */
 int CDECL MSVCRT__snprintf(char *str, unsigned int len, const char *format, ...)
@@ -882,6 +890,14 @@ int CDECL MSVCRT_vswprintf( MSVCRT_wchar_t* str, const MSVCRT_wchar_t* format, _
 }
 
 /*********************************************************************
+ *		_vscwprintf (MSVCRT.@)
+ */
+int CDECL _vscwprintf( const MSVCRT_wchar_t *format, __ms_va_list args )
+{
+    return MSVCRT_vsnwprintf( NULL, INT_MAX, format, args );
+}
+
+/*********************************************************************
  *		vswprintf_s (MSVCRT.@)
  */
 int CDECL MSVCRT_vswprintf_s( MSVCRT_wchar_t* str, MSVCRT_size_t num, const MSVCRT_wchar_t* format, __ms_va_list args )

include/msvcrt/stdio.h

@@ -115,6 +115,7 @@ int    __cdecl _setmaxstdio(int);
 int    __cdecl _snprintf(char*,size_t,const char*,...);
 char*  __cdecl _tempnam(const char*,const char*);
 int    __cdecl _unlink(const char*);
+int    __cdecl _vscprintf(const char*,__ms_va_list);
 int    __cdecl _vsnprintf(char*,size_t,const char*,__ms_va_list);
 
 void   __cdecl clearerr(FILE*);
@@ -166,6 +167,7 @@ wint_t   __cdecl _fputwchar(wint_t);
 wchar_t* __cdecl _getws(wchar_t*);
 int      __cdecl _putws(const wchar_t*);
 int      __cdecl _snwprintf(wchar_t*,size_t,const wchar_t*,...);
+int      __cdecl _vscwprintf(const wchar_t*,__ms_va_list);
 int      __cdecl _vsnwprintf(wchar_t*,size_t,const wchar_t*,__ms_va_list);
 FILE*    __cdecl _wfdopen(int,const wchar_t*);
 FILE*    __cdecl _wfopen(const wchar_t*,const wchar_t*);

include/msvcrt/wchar.h

@@ -275,6 +275,7 @@ wint_t   __cdecl _fputwchar(wint_t);
 wchar_t* __cdecl _getws(wchar_t*);
 int      __cdecl _putws(const wchar_t*);
 int      __cdecl _snwprintf(wchar_t*,size_t,const wchar_t*,...);
+int      __cdecl _vscwprintf(const wchar_t*,__ms_va_list);
 int      __cdecl _vsnwprintf(wchar_t*,size_t,const wchar_t*,__ms_va_list);
 FILE*    __cdecl _wfdopen(int,const wchar_t*);
 FILE*    __cdecl _wfopen(const wchar_t*,const wchar_t*);