Argox PA-20 Programming Guide Instrukcja Użytkownika Pobierz pdf (Strona 53)

PT-20 Programming Guide

_fcloseAll

Purpose：

Use _fcloseAll to close all files opened for buffered input/output with _fopen

or tmpfile.

Syntax：

void _fcloseAll(void);

Example call：

_fcloseAll();

Includes：

#include “SDK.h”

Description：

The _fcloseAll function closes all files that have been opened by _fopen or

tmpfile for buffered I/O. Buffers associated with files opened for writing are

written out to the corresponding file before closing.

_filelength

Purpose：

Use _filelength to dertimine the length of a file in bytes.

Syntax：

size_t _filelength(_TFILE* file_pointer);

Example call：

file_size = _filelength(infile);

Includes：

#include “SDK.h”

Description：

The _filelength function returns the size in number of bytes of the file

specified in the argument file_pointer. This pointer should be the return

value of earlier opened file by _fopen.

Returns：

The integer value returned by _filelength is the size of the file in number of

bytes.

_fopen

Purpose：

Use _fopen to open a file for buffered input/output operations.

Syntax：

_TFILE* _fopen(const char*filename, const char *access_mode);

Example call：

input_file = _fopen("c:\\data\\order.dat", "r");

Includes：

#include “SDK.h”

Description：

The fopen function opens the file specified in the argument filename. The

type of operations you intend to perform on the file must be given in the

argument access_mode. The following table explains the values that the

access_mode string can take:

Access

Mode String

Interpretation

Opens file for read operations only. The _fopen function

fails if the file does not exist.

Opens a new file for writing. If the file exists, its contents

are destroyed.

Opens an existing file for both read and write

operations. Error is returned if file does not exist.

1 2 ... 48 49 50 51 52 53 54 55 56 57 58 ... 129 130

Komentarze do niniejszej Instrukcji

Brak uwag

Argox PA-20 Programming Guide Instrukcja Użytkownika Strona 53

Komentarze do niniejszej Instrukcji

Powiązane produkty i podręczniki dla Ekwipunek Argox PA-20 Programming Guide