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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.
57 lines
1.5 KiB
C
57 lines
1.5 KiB
C
/***
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*strncpy.c - copy at most n characters of string
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*
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* Copyright (c) Microsoft Corporation. All rights reserved.
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*
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*Purpose:
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* defines strncpy() - copy at most n characters of string
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*
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*******************************************************************************/
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#include <string.h>
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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(strncpy)
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#endif
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/***
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*char *strncpy(dest, source, count) - copy at most n characters
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*
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*Purpose:
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* Copies count characters from the source string to the
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* destination. If count is less than the length of source,
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* NO NULL CHARACTER is put onto the end of the copied string.
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* If count is greater than the length of sources, dest is padded
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* with null characters to length count.
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*
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*
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*Entry:
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* char *dest - pointer to destination
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* char *source - source string for copy
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* unsigned count - max number of characters to copy
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*
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*Exit:
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* returns dest
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*
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*Exceptions:
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*
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*******************************************************************************/
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char * __cdecl strncpy (
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char * dest,
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const char * source,
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size_t count
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)
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{
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char *start = dest;
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while (count && (*dest++ = *source++) != '\0') /* copy string */
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count--;
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if (count) /* pad out with zeroes */
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while (--count)
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*dest++ = '\0';
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return(start);
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}
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