49d1a4c562
also start prefering NtDll API. so far: * NtQueryInformationFile * NtClose adds a performance workaround for windows unicode conversion. but that should probably be removed before merging
60 lines
1.2 KiB
C
60 lines
1.2 KiB
C
#include <windows.h>
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#include <malloc.h>
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#include <errno.h>
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#include <msvcrt.h>
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static errno_t __cdecl _int_memcpy_s (void *, size_t, const void *, size_t);
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static errno_t __cdecl _stub (void *, size_t, const void *, size_t);
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errno_t __cdecl (*__MINGW_IMP_SYMBOL(memcpy_s))(void *, size_t, const void *, size_t) =
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_stub;
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static errno_t __cdecl
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_stub (void *d, size_t dn, const void *s, size_t n)
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{
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errno_t __cdecl (*f)(void *, size_t, const void *, size_t) = __MINGW_IMP_SYMBOL(memcpy_s);
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if (f == _stub)
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{
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f = (errno_t __cdecl (*)(void *, size_t, const void *, size_t))
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GetProcAddress (__mingw_get_msvcrt_handle (), "memcpy_s");
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if (!f)
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f = _int_memcpy_s;
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__MINGW_IMP_SYMBOL(memcpy_s) = f;
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}
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return (*f)(d, dn, s, n);
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}
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errno_t __cdecl
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memcpy_s (void *d, size_t dn, const void *s, size_t n)
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{
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return _stub (d, dn, s, n);
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}
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static errno_t __cdecl
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_int_memcpy_s (void *d, size_t dn, const void *s, size_t n)
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{
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if (!n)
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return 0;
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if (!d || !s)
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{
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if (d)
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memset (d, 0, dn);
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errno = EINVAL;
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return EINVAL;
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}
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if (dn < n)
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{
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memset (d, 0, dn);
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errno = ERANGE;
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return ERANGE;
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}
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memcpy (d, s, n);
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return 0;
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}
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