[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

sdk/lib/ucrt/mbstring/mbsset.cpp

@@ -0,0 +1,110 @@
+/***
+*mbsset.c - Sets all charcaters of string to given character (MBCS)
+*
+*       Copyright (c) Microsoft Corporation. All rights reserved.
+*
+*Purpose:
+*       Sets all charcaters of string to given character (MBCS)
+*
+*******************************************************************************/
+#ifndef _MBCS
+    #error This file should only be compiled with _MBCS defined
+#endif
+
+#include <corecrt_internal_mbstring.h>
+#include <locale.h>
+#include <string.h>
+
+/***
+* mbsset - Sets all charcaters of string to given character (MBCS)
+*
+*Purpose:
+*       Sets all of characters in string (except the terminating '/0'
+*       character) equal to the supplied character.  Handles MBCS
+*       chars correctly.
+*
+*Entry:
+*       unsigned char *string = string to modify
+*       unsigned int val = value to fill string with
+*
+*Exit:
+*       returns string = now filled with the specified char
+*
+*Uses:
+*
+*Exceptions:
+*       Input parameters are validated. Refer to the validation section of the function.
+*
+*******************************************************************************/
+
+extern "C" unsigned char * __cdecl _mbsset_l(
+        unsigned char *string,
+        unsigned int val,
+        _locale_t plocinfo
+        )
+{
+        unsigned char  *start = string;
+        unsigned char highval, lowval;
+        _LocaleUpdate _loc_update(plocinfo);
+
+        /* validation section */
+        _VALIDATE_RETURN(string != nullptr, EINVAL, nullptr);
+
+_BEGIN_SECURE_CRT_DEPRECATION_DISABLE
+        if (_loc_update.GetLocaleT()->mbcinfo->ismbcodepage == 0)
+                return (unsigned char *)_strset((char *)string, val);
+_END_SECURE_CRT_DEPRECATION_DISABLE
+
+        highval = static_cast<unsigned char>(val >> 8);
+        if (highval != 0)
+        {
+                /* 2-byte value */
+
+                lowval = (unsigned char)(val & 0x00ff);
+
+                if(lowval=='\0')
+                {
+                    _ASSERTE(("invalid MBCS pair passed to mbsset",0));
+
+                    /* Ideally we would return nullptr here and signal an error
+                       condition. But since this function has no other
+                       error modes, there would be a good chance of crashing
+                       the caller. So instead we fill the string with spaces
+                       to ensure that no information leaks through
+                       unexpectedly. Anyway, we do set errno to EINVAL.
+                    */
+                    errno = EINVAL;
+                    lowval=highval=' ';
+                }
+
+                while (*string) {
+
+                        *string++ = highval;
+                        if (*string)
+                                *string++ = lowval;
+                        else
+                                /* don't orphan lead byte */
+                                string[-1] = ' ';
+                        }
+
+        }
+
+        else {
+                /* single byte value */
+
+                while (*string)
+                        *string++ = (unsigned char)val;
+        }
+
+        return(start);
+}
+
+extern "C" unsigned char * (__cdecl _mbsset)(
+        unsigned char *string,
+        unsigned int val
+        )
+{
+_BEGIN_SECURE_CRT_DEPRECATION_DISABLE
+    return _mbsset_l(string, val, nullptr);
+_END_SECURE_CRT_DEPRECATION_DISABLE
+}