The C library functions fread(), fgets()
and gets()
The functions fread(), fgets(),
and gets() are implemented as fast block input/output
functions where possible. These fast implementations are part of
the ARM stream implementation and they bypass fgetc().
Where the fast implementation is not possible, they are implemented
as a loop over fgetc() and ferror().
Each uses the FILE argument opaquely.
If you provide your own implementation of __FILE, __stdin (for gets()), fgetc(),
and ferror(), you can use these functions,
and the C++ object std::cin directly from the
library.
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