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300e1d525d
VS2022 version 17.2 and later (`_MSC_VER >= 1932`) added new intrinsic functions (`strncmp`, `strncpy`, `wcsncmp`, and `wcsncpy`). As we implement these ourselves, we have to avoid compiler error C2169. This problem surfaced with a recent GitHub Actions update: https://github.com/actions/runner-images/issues/14017 Use `#pragma function(...)` to disable new intrinsic functions.
46 lines
1.1 KiB
C++
46 lines
1.1 KiB
C++
//
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// wcsncpy.cpp
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//
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//
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// Defines wcsncpy(), which copies a string from one buffer to another. This
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// function copies at most 'count' characters. If fewer than 'count' characters
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// are copied, the rest of the buffer is padded with null characters.
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//
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#include <string.h>
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#pragma warning(disable:__WARNING_POSTCONDITION_NULLTERMINATION_VIOLATION) // 26036
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#if defined(_MSC_VER) && (defined(_M_ARM) || _MSC_VER >= 1932) // VS2022 version 17.2 and later
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#pragma function(wcsncpy)
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#endif
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extern "C" wchar_t * __cdecl wcsncpy(
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wchar_t* const destination,
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wchar_t const* const source,
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size_t const count
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)
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{
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size_t remaining = count;
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wchar_t* destination_it = destination;
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wchar_t const* source_it = source;
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while (remaining != 0 && (*destination_it++ = *source_it++) != 0)
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{
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--remaining;
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}
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if (remaining != 0)
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{
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while (--remaining != 0)
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{
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*destination_it++ = L'\0';
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}
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}
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return destination;
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}
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