[UCRT] Import Microsoft.Windows.SDK.CRTSource version 10.0.22621.3

Imported from https://www.nuget.org/packages/Microsoft.Windows.SDK.CRTSource/10.0.22621.3 License: MIT
2025-07-30 12:52:56 +00:00 · 2024-05-11 07:03:12 +02:00 · 2024-05-11 07:03:12 +02:00 · 04e0dc4a7a
commit 04e0dc4a7a
parent f1b60c66f0
568 changed files with 115483 additions and 0 deletions
--- a/sdk/lib/ucrt/mbstring/mbscat_s_l.cpp
+++ b/sdk/lib/ucrt/mbstring/mbscat_s_l.cpp
@ -0,0 +1,122 @@
+/***
+*mbscat_s_l.c - Concatenate one string to another (MBCS)
+*
+*       Copyright (c) Microsoft Corporation.  All rights reserved.
+*
+*Purpose:
+*       Concatenate one string to another (MBCS)
+*
+*******************************************************************************/
+#ifndef _MBCS
+    #error This file should only be compiled with _MBCS defined
+#endif
+
+#include <corecrt_internal_mbstring.h>
+#include <corecrt_internal_securecrt.h>
+
+
+
+errno_t __cdecl _mbscat_s_l(unsigned char *_Dst, size_t _SizeInBytes, const unsigned char *_Src, _LOCALE_ARG_DECL)
+{
+    unsigned char *p;
+    size_t available;
+    BOOL fFoundInvalidMBC, fIsLeadPrefix;
+
+    /* validation section */
+    _VALIDATE_STRING(_Dst, _SizeInBytes);
+    _VALIDATE_POINTER_RESET_STRING(_Src, _Dst, _SizeInBytes);
+
+    _LOCALE_UPDATE;
+    if (_LOCALE_SHORTCUT_TEST)
+    {
+        return strcat_s((char *)_Dst, _SizeInBytes, (const char *)_Src);
+    }
+
+    fFoundInvalidMBC = FALSE;
+    p = _Dst;
+    available = _SizeInBytes;
+    while (available > 0 && *p != 0)
+    {
+        p++;
+        available--;
+    }
+
+    /*
+     * Ran out of room while looking for end of dst string.
+     * p points 1 past end of buffer. We can't look past
+     * end of buffer so can't tell if dst ended with an
+     * invalid mbc.
+     */
+
+    if (available == 0)
+    {
+        _RESET_STRING(_Dst, _SizeInBytes);
+        _RETURN_DEST_NOT_NULL_TERMINATED(_Dst, _SizeInBytes);
+    }
+
+    /*
+     * Otherwise we have space available, p points at null that lies
+     * within _SizeInBytes, so available > 0. Check if dst ended with
+     * an invalid MBC (lead+null), if so then clear that lead byte,
+     * move the pointer back one and increase available by one.
+     */
+
+    _ISMBBLEADPREFIX(fIsLeadPrefix, _Dst, p-1);
+    if (fIsLeadPrefix)
+    {
+        fFoundInvalidMBC = TRUE;
+        p--;
+        *p = 0;
+        available++;
+    }
+
+    /* Append dst to src. */
+
+    while ((*p++ = *_Src++) != 0 && --available > 0)
+    {
+    }
+
+    /*
+     * We've run out of room in the destination before finding null in the src.
+     * It could be that the src was terminated with an invalid mbc (lead+null).
+     * In that case its ok to clear the copied lead byte and return mbcs_error.
+     */
+
+    if (available == 0)
+    {
+        if (*_Src == 0)
+        {
+            _ISMBBLEADPREFIX(fIsLeadPrefix, _Dst, p-1);
+            if (fIsLeadPrefix)
+            {
+                /* the source string ended with a lead byte: we remove it */
+                p[-1] = 0;
+                _RETURN_MBCS_ERROR;
+            }
+        }
+        _RESET_STRING(_Dst, _SizeInBytes);
+        _RETURN_BUFFER_TOO_SMALL(_Dst, _SizeInBytes);
+    }
+
+    /*
+     * If the src string ended with an invalid mbc (lead+null) then clear the
+     * lead byte.
+     */
+
+    _ISMBBLEADPREFIX(fIsLeadPrefix, _Dst, p-2);
+    if (fIsLeadPrefix)
+    {
+        p[-2] = 0;
+        available++;
+        fFoundInvalidMBC = TRUE;
+    }
+
+    _FILL_STRING(_Dst, _SizeInBytes, _SizeInBytes - available + 1);
+
+    if (fFoundInvalidMBC)
+    {
+        _RETURN_MBCS_ERROR;
+    }
+
+    _RETURN_NO_ERROR;
+}