# About M2SCI tools

Generally speaking about tools to convert Matlab files to Scilab

### Description

Scilab includes useful tools to convert Matlab M-files to Scilab.

Taking a Matlab M-file, `mfile2sci`

modifies this files so that it can be
compiled by Scilab. Then, this compiled code is converted to a "tree" of instructions
by `macr2tree`

. This "tree" is an imbrication of Scilab lists and tlists and
is the basis for conversion. Each instruction of this "tree" is converted to Scilab and
inference is done to known what are the variables. Once this "tree" is converted to Scilab,
code is generated using `tree2code`

.

All tlists used for coding this tree (and we call "MSCI tlists") are listed below:

- funcall
tlist representing a function call created by

`Funcall`

- operation
tlist representing an operation created by

`Operation`

- variable
tlist representing a variable created by

`Variable`

- cste
tlist representing a constant created by

`Cste`

- equal
tlist representing an instruction created by

`Equal`

- ifthenelse
tlist representing an IF/THEN/ELSE control instruction created inside M2SCI kernel functions

- while
tlist representing a WHILE control instruction created inside M2SCI kernel functions

- selectcase
tlist representing a SELECT/CASE control instruction created inside M2SCI kernel functions

- for
tlist representing a FOR control instruction created inside M2SCI kernel functions

The contents of these tlists is described in corresponding help pages.

Operations are converted using a function named `%<opcode>2sci`

with opcode
the Scilab code for this operator. See help page for overloading to have these codes. All
these functions are already written and are in directory SCI/modules/m2sci/macros/percent/.

Function calls are converted using a function called `sci_<Matlab_function_name>`

.
Some of these functions have been written and are in directory SCI/modules/m2sci/macros/sci_files/.
We are working on increasing the set of Matlab functions converted. However, everybody can
write such functions using help page sci_files.

Inference is done using tlists of type "infer" containing fields:

- dims
list of dimensions

- type
"type" tlist

- contents
"contents" tlist if a Cell or a Struct

Type is a tlist of type "type" containing fields:

- vtype
data type

- property
property

To have more details about inference see help page for m2scideclare.

### See also

- mfile2sci — Matlab M-file to Scilab conversion function
- translatepaths — convert a set of Matlab M-files directories to Scilab
- overloading — 表示,関数および演算子オーバーロード機能
- sci_files — How to write conversion functions
- Funcall — Create a tree representing a function call
- Operation — Create a tree representing an operation
- Variable — Create a tree representing a variable
- Cste — Create a tree representing a constant
- Infer — Create a tree containing inference data
- Type — Create a tree containing type inference data
- Equal — Create a tree representing an instruction
- m2scideclare — Giving tips to help M2SCI...

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