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Eli Zaretskii authored
src/fileio.c (check_existing): New function. (make_temp_name, Ffile_exists_p, Ffile_writable_p): Call it instead of calling 'stat', when what's needed is to check whether a file exists. This avoids expensive system calls on MS-Windows. src/w32.c (init_environment): Call 'check_existing' instead of 'stat'. src/lread.c (openp) [WINDOWSNT]: Call 'access' instead of 'stat' to determine whether a file exists and is not a directory. src/lisp.h (check_existing): Add prototype.
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