Returns the offset of the current byte relative to the beginning of a file
mtell([fd])
a scalar: a file descriptor returned by the function
mopen
. -1
stands for last opened file. Default value is
-1
.
The function mtell
returns the offset of the
current byte relative to the beginning of the file associated with
the named stream fd
.
// Open in binary write a temporary file testFile=TMPDIR + '/testFile.bin'; fd = mopen(testFile,'wb'); mput(42,'d'); // Will write 42 in last opened file mtell() // Will return 8, the current position in the file descriptor mput(42+2,'d', fd); // Will open fd transparently to write 42 mtell(fd) // Will return 16, the current position in the file descriptor mseek(0, fd); // return at the beginning of the file mtell(fd) // Will return 0 mclose(fd); | ![]() | ![]() |