GetModuleFileNameA.cpp

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//
// GetModuleFileNameA.cpp
//
//      Copyright (c) Microsoft Corporation. All rights reserved.
//
// Definition of __acrt_GetModuleFileNameA.
//
 
#include <corecrt_internal_win32_buffer.h>
 
DWORD __cdecl __acrt_GetModuleFileNameA(
    HMODULE const hModule,
    char * const  lpFilename,
    DWORD const   nSize
    )
{
    size_t const wide_buffer_size = MAX_PATH + 1;
    wchar_t wide_buffer[wide_buffer_size];
 
    DWORD const amount_copied = GetModuleFileNameW(
        hModule,
        wide_buffer,
        wide_buffer_size
        );
 
    if (amount_copied == 0) {
        __acrt_errno_map_os_error(GetLastError());
        return 0;
    }
 
    __crt_no_alloc_win32_buffer<char> filename_buffer(lpFilename, static_cast<size_t>(nSize));
 
    errno_t const cvt = __acrt_wcs_to_mbs_cp(
        wide_buffer,
        filename_buffer,
        __acrt_get_utf8_acp_compatibility_codepage()
        );
 
    return static_cast<DWORD>(filename_buffer.size());
}