ARM VERSION 1.2 Arkusz Danych Pobierz pdf (Strona 170)

100

101

The C and C++ Libraries

4.10.5 _sys_read()

This function reads the contents of a file into a buffer.

Syntax

int _sys_read(FILEHANDLE fh, unsigned char *buf, unsigned len, int mode)

Implementation

The

mode

argument is abitmap describing the state of the file connected to

, as for

_sys_write()

Returns

The return value is one of the following:

• The number of characters not read (that is,

len

result

were read).

• An error indication.

• An EOF indicator. The EOF indication involves the setting of

0x80000000

in the

normal result. The target-independent code is capable of handling either:

Early EOF The last read from a file returns some characters plus an

EOF indicator.

Late EOF The last read returns only EOF.

1 2 ... 165 166 167 168 169 170 171 172 173 174 175 ... 275 276

Komentarze do niniejszej Instrukcji

Brak uwag

ARM VERSION 1.2 Arkusz Danych Strona 170

Komentarze do niniejszej Instrukcji