Multitech MT5634HD16 Uživatelská příručka stáhnout pdf (Strana 178)

RASExpress User Guide

168 CommPlete Communications Server

FGETC fgetc(integer file_handle, var string buffer) : integer;

Reads a character from the file given by file_handle into buffer. The buffer is null ter-

minated. If an invalid file handle is passed, the command is ignored and 0 is re-

turned; otherwise the number of bytes read is returned. If an error is encountered

while reading, a negative value is returned.

Example

See fcreate command.

FGETS fgets(integer file_handle, var string buffer, integer max_len) : integer;

Reads a new line terminated string from the file given by file_handle into buffer. Buffer

is null terminated. The maximum number of characters to read can be specified by

max_len, but is limited to 132. Returns the number of bytes read (excluding the null).

If an invalid file handle is passed, the command is ignored and 0 is returned.. If the

end of file is reached, the predefined variable EOF is set. If there is any error in

reading, a negative value is returned.

Example

See fcreate command.

FINDFIRST findfirst(string file_pattern, integer attribute, var string file_name) : integer;

The file_pattern is the pattern to seek in the directory. It can include the drive letter

and path. Attribute is the file attribute to seek. If a file/directory matching the given

pattern is found, file_name is updated; else file_name is not updated. The return value

is 1 if a matching file is found, else it is 0.

Example

/* This script illustrates the findfirst and findnext commands. */

proc main;

string dir_name;

string file_name;

integer len;

integer attribute;

len = 64;

attribute = 0;

display("Example for findfirst and findnext commands^J^M");

display("Enter file pattern : ");

if getstr(dir_name, len) then

fdisplay(" ^J^MFiles in %s are :^J^M", dir_name);

if findfirst(dir_name, attribute, file_name) then

fdisplay("%s^J^M", file_name);

while findnext(file_name) do

fdisplay("%s^J^M", file_name);

endwhile

endif

endproc

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