mtell

Arguments

fd

a scalar: a file descriptor returned by the function mopen. -1 stands for last opened file. Default value is -1.

Description

The function mtell returns the offset of the current byte relative to the beginning of the file associated with the named stream fd.

Examples

// 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);

See also

• mclose — closes opened files
• meof — checks if end of file has been reached
• mfprintf — converts, formats, and writes data to a file
• fprintfMat — writes a matrix in a file
• mfscanf — reads input from the stream pointer stream (interface to the C fscanf function)
• fscanfMat — reads a matrix from a text file
• mget — parses numbers in a binary file and returns them as decimals
• mgetstr — reads a character string from a file
• mopen — opens files in Scilab
• mprintf — converts, formats, and writes data to the main scilab window
• mput — writes byte or word in a given binary format
• mputstr — write a single text in an open file
• mseek — sets current position in a binary file
• mdelete — deletes file(s)