HP Pascal/iX Reference Manual (31502-90022)

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readdir
Usage
readdir (f, k, v)
readdir (f, k, v1, ..., vn)
Parameters
f A file variable open to read that is not a textfile.
k The index of a component in f .
v The name of a variable or component of a structure whose type is not
FILE and does not contain a component of type FILE.
Description
The procedure readdir( f, k, v) places the current position at component
k , and then reads the value of that component into v . The index, k , is
relative to the beginning of the file. Formally, this is equivalent to:
seek(f,k);
read(f,v);
The call get( f ) is not required between seek and read because of the
definition of read. The procedure readdir can be used only with files
opened for direct access. Therefore, a textfile cannot appear as a
parameter for readdir.
Example
readdir(file_var,indx,variable)
readdir(file_var,indx,variable1,...,variablen)
Illustration
Suppose examp_file is a file of integer with four components just opened
in the direct access state. The current position is the first component.
To read the third component into int_var, readdir is called. After
readdir executes, the current position is the fourth component.