openssl/crypto/bio/bio_lcl.h

#include <openssl/bio.h>

#if BIO_FLAGS_UPLINK==0
/* Shortcut UPLINK calls on most platforms... */
# define UP_stdin        stdin
# define UP_stdout       stdout
# define UP_stderr       stderr
# define UP_fprintf      fprintf
# define UP_fgets        fgets
# define UP_fread        fread
# define UP_fwrite       fwrite
# undef  UP_fsetmod
# define UP_feof         feof
# define UP_fclose       fclose

# define UP_fopen        fopen
# define UP_fseek        fseek
# define UP_ftell        ftell
# define UP_fflush       fflush
# define UP_ferror       ferror
# ifdef _WIN32
#  define UP_fileno       _fileno
#  define UP_open         _open
#  define UP_read         _read
#  define UP_write        _write
#  define UP_lseek        _lseek
#  define UP_close        _close
# else
#  define UP_fileno       fileno
#  define UP_open         open
#  define UP_read         read
#  define UP_write        write
#  define UP_lseek        lseek
#  define UP_close        close
# endif
#endif