[UCRTBASE] Fix broken imports from ntdll

Previously sprintf and _vsnprintf were imported from ntdll. These functions are defined as inline functions in ucrt headers, but linked directly by legacy CRT code.

Author: tkreuzer

dll/win32/ucrtbase/CMakeLists.txt

@@ -1,7 +1,22 @@
 
 spec2def(ucrtbase.dll ucrtbase.spec ADD_IMPORTLIB)
 
+# Hack to replace the old CRT include directory with the UCRT include directory
+get_property(INCLUDE_DIRS DIRECTORY . PROPERTY INCLUDE_DIRECTORIES)
+list(REMOVE_ITEM INCLUDE_DIRS "${REACTOS_SOURCE_DIR}/sdk/include/crt")
+set_property(DIRECTORY . PROPERTY INCLUDE_DIRECTORIES ${INCLUDE_DIRS})
+include_directories(${REACTOS_SOURCE_DIR}/sdk/include/ucrt)
+
+remove_definitions(-D_CRT_NON_CONFORMING_SWPRINTFS)
+
+add_compile_definitions(
+    _UCRT
+    _CORECRT_BUILD
+    CRTDLL
+)
+
 add_library(ucrtbase SHARED
+    printf.c
     stubs.c
     ucrtbase_stubs.c
     ucrtbase.def

dll/win32/ucrtbase/printf.c

@@ -0,0 +1,49 @@
+/*
+ * PROJECT:     ReactOS CRT
+ * LICENSE:     MIT (https://spdx.org/licenses/MIT)
+ * PURPOSE:     Instantiation of CRT stdio inline functions
+ * COPYRIGHT:   Copyright 2023-2024 Timo Kreuzer <[email protected]>
+ */
+
+#define _NO_CRT_STDIO_INLINE
+#include <stdio.h>
+
+// These 2 functions are inlined in UCRT headers, but they are referenced by
+// external code in the legacy CRT, so we need to provide them as non-inline
+// functions here.
+
+_Success_(return >= 0)
+_Check_return_opt_
+int __CRTDECL sprintf(
+    _Pre_notnull_ _Always_(_Post_z_) char*       const _Buffer,
+    _In_z_ _Printf_format_string_    char const* const _Format,
+    ...)
+{
+    int _Result;
+    va_list _ArgList;
+
+    __crt_va_start(_ArgList, _Format);
+
+    _Result = __stdio_common_vsprintf(
+        _CRT_INTERNAL_LOCAL_PRINTF_OPTIONS | _CRT_INTERNAL_PRINTF_LEGACY_VSPRINTF_NULL_TERMINATION,
+        _Buffer, (size_t)-1, _Format, NULL, _ArgList);
+
+    __crt_va_end(_ArgList);
+    return _Result < 0 ? -1 : _Result;
+}
+
+_Success_(return >= 0)
+_Check_return_opt_
+int __CRTDECL _vsnprintf(
+    _Out_writes_opt_(_BufferCount) _Post_maybez_ char*       const _Buffer,
+    _In_                                        size_t      const _BufferCount,
+    _In_z_ _Printf_format_string_               char const* const _Format,
+                                                va_list           _ArgList
+    )
+{
+    int _Result = __stdio_common_vsprintf(
+        _CRT_INTERNAL_LOCAL_PRINTF_OPTIONS | _CRT_INTERNAL_PRINTF_LEGACY_VSPRINTF_NULL_TERMINATION,
+        _Buffer, _BufferCount, _Format, NULL, _ArgList);
+
+    return _Result < 0 ? -1 : _Result;
+}