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Aide de Scilab >> Entrées/Sorties [fichiers] > mtell


Returns the offset of the current byte relative to the beginning of a file





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


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
  • 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)
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Last updated:
Tue Jul 20 11:19:19 CEST 2021