Scol

h1. File api SCOL

"http://www.scolring.org/files/doc_html/file_system.html":http://www.scolring.org/files/doc_html/file_system.html

+Files must be relative at the active Scol partition+.

There is not the close file function, Scol manage any I/O.

Files are loaded in Scol memory.

*To open a file :*

Read only :

_checkpack = fun [S] P

Write only :

_getmodifypack = fun [S] W

*To read a file :*

_getpack = fun [P] S

<pre>

fun main ()=

  _showconsole;

  let _checkpack "myFolder/myFile.ext" -> pFile in

  if pFile == nil then

    _fooS "This file doesn't exist"

  else

    _fooS _getpack pFile;

  0;;

</pre>

To get the content line by line :

<pre>

fun displayLines (list)=

  if list == empty then

    0

  else

    let hd list -> line in

    (

    _fooS line;

    displayLines tl list

    );;

fun main ()=

  _showconsole;

  let _checkpack "myFolder/myFile.ext" -> pFile in

  if pFile == nil then

  (

    _fooS "This file doesn't exist";

    1

  )

  else

    displayLines lineextr _getpack pFile;;

</pre>

If you want the content word by word, you can do something similar with _strextr_ instead of _lineextr_.

To get the size :

_fileSize = fun [P] I

<pre>

fun main ()=

  _showconsole;

  let _checkpack "myFolder/myFile.ext" -> pFile in

  _fooId

     if pFile == nil then

       nil

     else

       _fileSize pFile;

  0;;

</pre>

*To write in a file :*

_createpack = fun [S W] I

_appendpack = fun [S W] I

_storepack = fun [S S] I

<pre>

fun main ()=

  _showconsole;

  let _getmodifypack "anyFolder/anyFile.ext" -> wFile in

  if 0 == _createpack "Bob and Alice " wFile then

    if 0 == _appendpack "are married !" wFile then

      _fooS "Done !"

    else

      _fooS "_appendpack : error"

  else

    _fooS "_createpack : error";

  0;;

</pre>

Author : iri

Date   : december 2011

*Return to [[Examples]]*