ARM VERSION 1.2 Datový list stáhnout pdf (Strana 167)

100

101

The C and C++ Libraries

{

/* Your implementation of ferror */

return EOF;

}

void test(void)

{

printf("Hello world\n"); /* This works ... */

}

By default,

fread()

and

fwrite()

call fast block input/output functions that are part of

the ARM stream implementation. If you define your own

__FILE

structure instead of

using the ARM stream implementation,

fread()

and

fwrite()

will call

fgetc()

instead

of calling the block input/output functions. See also the implementation in

\Examples\Embedded\embed\retarget.c

fread(), fgets(), and gets()

The functions

fread()

fgets()

, and

gets()

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 directly from the library.

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