diff --git a/PythonicGcodeMachine/Gcode/Fanuc/__init__.py b/PythonicGcodeMachine/Gcode/Fanuc/__init__.py
index 37fdd45a0d6bed35fad763c9e5dbb87020fe76cb..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391 100644
--- a/PythonicGcodeMachine/Gcode/Fanuc/__init__.py
+++ b/PythonicGcodeMachine/Gcode/Fanuc/__init__.py
@@ -1,384 +0,0 @@
-####################################################################################################
-#
-# PythonicGcodeMachine - @licence_header_description@
-# Copyright (C) 2018 Fabrice Salvaire
-#
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
-#
-####################################################################################################
-
-"""Module to implement the G-code language.
-
-History
--------
-
-The G-code language, also called RS-274, is a programming language for numerical control.  It was
-developed by the EIA in the early 1960s, and finally standardised by ISO in February 1980 as RS274D
-/ ISO 6983.
-
-The G-code language has several flavours and historical versions. A list of reference documents
-follows :
-
-* The NIST RS274NGC Interpreter - Version 3, T. Kramer, F. Proctor, E. Messina, National Institute
-  of Standards and Technology, NISTIR 6556, August 17, 2000
-* The documentation of the `Linux CNC <http://linuxcnc.org>`_ project, formerly Enhanced Machine
-  Controller developed at NIST,
-* EIA Standard RS-274-D Interchangeable Variable Block Data Format for Positioning, Contouring, and
-  Contouring/Positioning Numerically Controlled Machines, 2001 Eye Street, NW, Washington,
-  D.C. 20006: Electronic Industries Association, February 1979
-
-Overview
---------
-
-The RS274/NGC language is based on lines of code. Each line (also called a “block”) may include
-commands to a machining center to do several different things.
-
-A typical line of code consists of an optional line number at the beginning followed by one or more
-“words.” A word consists of a letter followed by a number (or something that evaluates to a
-number). A word may either give a command or provide an argument to a command. For example,
-:code:`G1 X3` is a valid line of code with two words. :code:`G1` is a command meaning “move in a
-straight line at the programmed feed rate,” and :code:`X3` provides an argument value (the value of
-X should be 3 at the end of the move). Most RS274/NGC commands start with either G or M (for
-miscellaneous). The words for these commands are called “G codes” and “M codes.”
-
-Language View of a Machining Center
------------------------------------
-
-Parameters
-~~~~~~~~~~
-
-In the RS274/NGC language view, a machining center maintains an array of 5400 numerical
-parameters. Many of them have specific uses. The parameter array should persist over time, even if
-the machining center is powered down.
-
-Coordinate Systems
-~~~~~~~~~~~~~~~~~~
-
-In the RS274/NGC language view, a machining center has an absolute coordinate system and nine
-program coordinate systems.
-
-You can set the offsets of the nine program coordinate systems using G10 L2 Pn (n is the number of
-the coordinate system) with values for the axes in terms of the absolute coordinate system.
-
-You can select one of the nine systems by using G54, G55, G56, G57, G58, G59, G59.1, G59.2, or
-G59.3. It is not possible to select the absolute coordinate system directly. You can offset the
-current coordinate system using G92 or G92.3. This offset will then apply to all nine program
-coordinate systems. This offset may be cancelled with G92.1 or G92.2.
-
-You can make straight moves in the absolute machine coordinate system by using G53 with either G0 or
-G1.
-
-Data for coordinate systems is stored in parameters.
-
-During initialization, the coordinate system is selected that is specified by parameter 5220. A
-value of 1 means the first coordinate system (the one G54 activates), a value of 2 means the second
-coordinate system (the one G55 activates), and so on. It is an error for the value of parameter 5220
-to be anything but a whole number between one and nine.
-
-Format of a Line
-----------------
-
-A permissible line of input RS274/NGC code consists of the following, in order, with the restriction
-that there is a maximum (currently 256) to the number of characters allowed on a line.
-
-#. an optional block delete character, which is a slash :code:`/` .
-#. an optional line number.
-#. any number of words, parameter settings, and comments.
-#. an end of line marker (carriage return or line feed or both).
-
-Spaces and tabs are allowed anywhere on a line of code and do not change the meaning of the line,
-except inside comments. This makes some strange-looking input legal. The line :code:`g0x +0. 12 34y
-7` is equivalent to :code:`g0 x+0.1234 y7`, for example.
-
-Blank lines are allowed in the input. They are to be ignored.
-
-Input is case insensitive, except in comments, i.e., any letter outside a comment may be in upper or
-lower case without changing the meaning of a line.
-
-Line Number
-~~~~~~~~~~~
-
-A line number is the letter :code:`N` followed by an integer (with no sign) between 0 and 99999
-written with no more than five digits (000009 is not OK, for example). Line numbers may be repeated
-or used out of order, although normal practice is to avoid such usage. Line numbers may also be
-skipped, and that is normal practice. A line number is not required to be used, but must be in the
-proper place if used.
-
-Word
-~~~~
-
-A word is a letter other than :code:`N` followed by a real value.
-
-Words may begin with any of the letters shown in the following table. The table includes :code:`N`
-for completeness, even though, as defined above, line numbers are not words. Several letters
-(:code:`I`, :code:`J, K`, :code:`L`, :code:`P`, :code:`R`) may have different meanings in different
-contexts.
-
-Table. Linux CNC Words and their meanings Letter
-
-====== =====================================================
-Letter 	Meaning
-====== =====================================================
-A       A axis of machine
-B       B axis of machine
-C       C axis of machine
-D       Tool radius compensation number
-F       Feed rate
-G       General function (See table Modal Groups)
-H       Tool length offset index
-I       X offset for arcs and G87 canned cycles
-J       Y offset for arcs and G87 canned cycles
-K       Z offset for arcs and G87 canned cycles.
-        Spindle-Motion Ratio for G33 synchronized movements.
-L       Generic parameter word for G10, M66 and others
-M       Miscellaneous function (See table Modal Groups)
-N       Line number
-P       Dwell time in canned cycles and with G4.
-        Key used with G10.
-Q       Feed increment in G73, G83 canned cycles
-R       Arc radius or canned cycle plane
-S       Spindle speed
-T       Tool selection
-U       U axis of machine
-V       V axis of machine
-W       W axis of machine
-X       X axis of machine
-Y       Y axis of machine
-Z       Z axis of machine
-====== =====================================================
-
-A real value is some collection of characters that can be processed to come up with a number. A real
-value may be an explicit number (such as 341 or -0.8807), a parameter value, an expression, or a
-unary operation value.
-
-Number
-~~~~~
-
-The following rules are used for (explicit) numbers. In these rules a digit is a single character
-between 0 and 9.
-
-* A number consists of (1) an optional plus or minus sign, followed by (2) zero to many digits,
-  followed, possibly, by (3) one decimal point, followed by (4) zero to many digits — provided that
-  there is at least one digit somewhere in the number.
-* There are two kinds of numbers: integers and decimals. An integer does not have a decimal point in
-  it; a decimal does.
-* Numbers may have any number of digits, subject to the limitation on line length.
-* A non-zero number with no sign as the first character is assumed to be positive.  Notice that
-  initial (before the decimal point and the first non-zero digit) and trailing (after the decimal
-  point and the last non-zero digit) zeros are allowed but not required. A number written with
-  initial or trailing zeros will have the same value when it is read as if the extra zeros were not
-  there.
-
-Parameter Value
-~~~~~~~~~~~~~~~
-
-A parameter value is the pound character :code:`#` followed by a real value. The real value must
-evaluate to an integer between 1 and 5399. The integer is a parameter number, and the value of the
-parameter value is whatever number is stored in the numbered parameter.
-
-The :code:`#` character takes precedence over other operations, so that, for example, :code:`#1+2`
-means the number found by adding 2 to the value of parameter 1, not the value found in parameter
-3. Of course, :code:`#[1+2]` does mean the value found in parameter 3. The :code:`#` character may
-be repeated; for example :code:`##2` means the value of the parameter whose index is the (integer)
-value of parameter 2.
-
-Expressions and Binary Operations
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-An expression is a set of characters starting with a left bracket :code:`[` and ending with a
-balancing right bracket :code:`]`. In between the brackets are numbers, parameter values,
-mathematical operations, and other expressions. An expression may be evaluated to produce a
-number. The expressions on a line are evaluated when the line is read, before anything on the line
-is executed. An example of an expression is :code:`[ 1 + acos[0] - [#3 ** [4.0/2]]]`.
-
-Binary operations appear only inside expressions. Nine binary operations are defined. There are four
-basic mathematical operations: addition :code:`+`, subtraction :code:`-`, multiplication :code:`*`,
-and division :code:`/`. There are three logical operations: non-exclusive or :code:`OR`, exclusive
-or :code:`XOR`, and logical and :code:`AND`. The eighth operation is the modulus operation
-:code:`MOD`. The ninth operation is the “power” operation :code:`**` of raising the number on the
-left of the operation to the power on the right.  The binary operations are divided into three
-groups. The first group is: power. The second group is: multiplication, division, and modulus. The
-third group is: addition, subtraction, logical non- exclusive or, logical exclusive or, and logical
-and. If operations are strung together (for example in the expression :code:`[2.0 / 3 * 1.5 - 5.5 /
-11.0]`), operations in the first group are to be performed before operations in the second group and
-operations in the second group before operations in the third group. If an expression contains more
-than one operation from the same group (such as the first / and * in the example), the operation on
-the left is performed first. Thus, the example is equivalent to: :code:`[((2.0 / 3) * 1.5) - (5.5 /
-11.0)]`, which simplifies to :code:`[1.0 - 0.5]`, which is 0.5.
-
-The logical operations and modulus are to be performed on any real numbers, not just on integers.
-The number zero is equivalent to logical false, and any non-zero number is equivalent to logical
-true.
-
-Unary Operation Value
-~~~~~~~~~~~~~~~~~~~~~
-
-A unary operation value is either :code:`ATAN` followed by one expression divided by another
-expression (for example :code:`ATAN[2]/[1+3]`) or any other unary operation name followed by an
-expression (for example :code:`SIN[90]`). The unary operations are: :code:`ABS` (absolute value),
-:code:`ACOS` (arc cosine), :code:`ASIN` (arc sine), :code:`ATAN` (arc tangent), :code:`COS`
-(cosine), :code:`EXP` (e raised to the given power), :code:`FIX` (round down), :code:`FUP` (round
-up), :code:`LN` (natural logarithm), :code:`ROUND` (round to the nearest whole number), :code:`SIN`
-(sine), :code:`SQRT` (square root), and :code:`TAN` (tangent). Arguments to unary operations which
-take angle measures (:code:`COS`, :code:`SIN`, and :code:`TAN`) are in degrees. Values returned by
-unary operations which return angle measures (:code:`ACOS`, :code:`ASIN`, and :code:`ATAN`) are also
-in degrees.
-
-The :code:`FIX` operation rounds towards the left (less positive or more negative) on a number line,
-so that :code:`FIX[2.8] = 2` and :code:`FIX[-2.8] = -3`, for example. The :code:`FUP` operation
-rounds towards the right (more positive or less negative) on a number line; :code:`FUP[2.8] = 3` and
-:code:`FUP[-2.8] = -2`, for example.
-
-Parameter Setting
-~~~~~~~~~~~~~~~~~
-
-A parameter setting is the following four items one after the other: (1) a pound character
-:code:`#`, (2) a real value which evaluates to an integer between 1 and 5399, (3) an equal sign
-:code:`=`, and (4) a real value. For example :code:`#3 = 15` is a parameter setting meaning “set
-parameter 3 to 15.”
-
-A parameter setting does not take effect until after all parameter values on the same line have
-been found. For example, if parameter 3 has been previously set to 15 and the line :code:`#3=6 G1
-x#3` is interpreted, a straight move to a point where x equals 15 will occur and the value of
-parameter 3 will be 6.
-
-Comments and Messages
-~~~~~~~~~~~~~~~~~~~~~
-
-Printable characters and white space inside parentheses is a comment. A left parenthesis always
-starts a comment. The comment ends at the first right parenthesis found thereafter. Once a left
-parenthesis is placed on a line, a matching right parenthesis must appear before the end of the
-line.  Comments may not be nested; it is an error if a left parenthesis is found after the start of
-a comment and before the end of the comment. Here is an example of a line containing a comment:
-:code:`G80 M5 (stop motion)`. Comments do not cause a machining center to do anything.
-
-.. A comment contains a message if “MSG,” appears after the left parenthesis and before any other
-  printing characters. Variants of “MSG,” which include white space and lower case characters are
-  allowed. The rest of the characters before the right parenthesis are considered to be a message.
-  Messages should be displayed on the message display device. Comments not containing messages need
-  not be displayed there.
-
-Item Repeats
-~~~~~~~~~~~~
-
-A line may have any number of :code:`G` words, but two :code:`G` words from the same modal group may
-not appear on the same line.
-
-A line may have zero to four :code:`M` words. Two :code:`M` words from the same modal group may not
-appear on the same line.
-
-For all other legal letters, a line may have only one word beginning with that letter.
-
-If a parameter setting of the same parameter is repeated on a line, :code:`#3=15 #3=6`, for example,
-only the last setting will take effect. It is silly, but not illegal, to set the same parameter
-twice on the same line.
-
-If more than one comment appears on a line, only the last one will be used; each of the other
-comments will be read and its format will be checked, but it will be ignored thereafter. It is
-expected that putting more than one comment on a line will be very rare.
-
-Item order
-~~~~~~~~~~
-
-The three types of item whose order may vary on a line (as given at the beginning of this section)
-are word, parameter setting, and comment. Imagine that these three types of item are divided into
-three groups by type.
-
-The first group (the words) may be reordered in any way without changing the meaning of the line.
-
-If the second group (the parameter settings) is reordered, there will be no change in the meaning of
-the line unless the same parameter is set more than once. In this case, only the last setting of the
-parameter will take effect. For example, after the line :code:`#3=15 #3=6` has been interpreted, the
-value of parameter 3 will be 6. If the order is reversed to :code:`#3=6 #3=15` and the line is
-interpreted, the value of parameter 3 will be 15.
-
-If the third group (the comments) contains more than one comment and is reordered, only the last
-comment will be used.
-
-If each group is kept in order or reordered without changing the meaning of the line, then the three
-groups may be interleaved in any way without changing the meaning of the line. For example, the line
-:code:`g40 g1 #3=15 (foo) #4=-7.0` has five items and means exactly the same thing in any of the 120
-possible orders (such as :code:`#4=-7.0 g1 #3=15 g40 (foo)`) for the five items.
-
-Commands and Machine Modes
-~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-In RS274/NGC, many commands cause a machining center to change from one mode to another, and the
-mode stays active until some other command changes it implicitly or explicitly. Such commands are
-called “modal”. For example, if coolant is turned on, it stays on until it is explicitly turned
-off. The :code:`G` codes for motion are also modal. If a :code:`G1` (straight move) command is given
-on one line, for example, it will be executed again on the next line if one or more axis words is
-available on the line, unless an explicit command is given on that next line using the axis words or
-cancelling motion.
-
-“Non-modal” codes have effect only on the lines on which they occur. For example, :code:`G4` (dwell)
-is non-modal.
-
-Modal Groups
-------------
-
-Modal commands are arranged in sets called “modal groups”, and only one member of a modal group may
-be in force at any given time. In general, a modal group contains commands for which it is logically
-impossible for two members to be in effect at the same time — like measure in inches vs. measure in
-millimeters. A machining center may be in many modes at the same time, with one mode from each modal
-group being in effect.
-
-.. The modal groups are shown in Table 4.
-
-For several modal groups, when a machining center is ready to accept commands, one member of the
-group must be in effect. There are default settings for these modal groups. When the machining
-center is turned on or otherwise re-initialized, the default values are automatically in effect.
-
-Group 1, the first group on the table, is a group of :code:`G` codes for motion. One of these is
-always in effect. That one is called the current motion mode.
-
-It is an error to put a G-code from group 1 and a G-code from group 0 on the same line if both of
-them use axis words. If an axis word-using G-code from group 1 is implicitly in effect on a line (by
-having been activated on an earlier line), and a group 0 G-code that uses axis words appears on the
-line, the activity of the group 1 G-code is suspended for that line. The axis word-using G-codes
-from group 0 are :code:`G10`, :code:`G28`, :code:`G30`, and :code:`G92`.
-
-G and Input Codes
------------------
-
-See ...
-
-..
-  G codes of the RS274/NGC language are shown in Table 5 and described following that.
-
-  In the command prototypes, three dots (...) stand for a real value. As described earlier, a real
-  value may be (1) an explicit number, 4, for example, (2) an expression, :code:`[2+2]`, for example,
-  (3) a parameter value, #88, for example, or (4) a unary function value, :code:`acos[0]`, for
-  example.  In most cases, if axis words (any or all of X..., Y..., Z..., A..., B..., C...) are given,
-  they specify a destination point. Axis numbers are in the currently active coordinate system, unless
-  explicitly described as being in the absolute coordinate system. Where axis words are optional, any
-  omitted axes will have their current value. Any items in the command prototypes not explicitly
-  described as optional are required. It is an error if a required item is omitted.
-
-  In the prototypes, the values following letters are often given as explicit numbers. Unless stated
-  otherwise, the explicit numbers can be real values. For example, :code:`G10 L2` could equally well
-  be written :code:`G[2*5] L[1+1]`. If the value of parameter 100 were 2, :code:`G10 L#100` would also
-  mean the same. Using real values which are not explicit numbers as just shown in the examples is
-  rarely useful.
-
-  If L... is written in a prototype the “...” will often be referred to as the “L number”. Similarly the
-  “...” in H... may be called the “H number”, and so on for any other letter.
-
-Order of Execution
-------------------
-
-The order of execution of items on a line is critical to safe and effective machine operation. Items
-are executed in a particular order if they occur on the same line.
-
-"""
diff --git a/PythonicGcodeMachine/Gcode/Heidenhain/__init__.py b/PythonicGcodeMachine/Gcode/Heidenhain/__init__.py
index 37fdd45a0d6bed35fad763c9e5dbb87020fe76cb..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391 100644
--- a/PythonicGcodeMachine/Gcode/Heidenhain/__init__.py
+++ b/PythonicGcodeMachine/Gcode/Heidenhain/__init__.py
@@ -1,384 +0,0 @@
-####################################################################################################
-#
-# PythonicGcodeMachine - @licence_header_description@
-# Copyright (C) 2018 Fabrice Salvaire
-#
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
-#
-####################################################################################################
-
-"""Module to implement the G-code language.
-
-History
--------
-
-The G-code language, also called RS-274, is a programming language for numerical control.  It was
-developed by the EIA in the early 1960s, and finally standardised by ISO in February 1980 as RS274D
-/ ISO 6983.
-
-The G-code language has several flavours and historical versions. A list of reference documents
-follows :
-
-* The NIST RS274NGC Interpreter - Version 3, T. Kramer, F. Proctor, E. Messina, National Institute
-  of Standards and Technology, NISTIR 6556, August 17, 2000
-* The documentation of the `Linux CNC <http://linuxcnc.org>`_ project, formerly Enhanced Machine
-  Controller developed at NIST,
-* EIA Standard RS-274-D Interchangeable Variable Block Data Format for Positioning, Contouring, and
-  Contouring/Positioning Numerically Controlled Machines, 2001 Eye Street, NW, Washington,
-  D.C. 20006: Electronic Industries Association, February 1979
-
-Overview
---------
-
-The RS274/NGC language is based on lines of code. Each line (also called a “block”) may include
-commands to a machining center to do several different things.
-
-A typical line of code consists of an optional line number at the beginning followed by one or more
-“words.” A word consists of a letter followed by a number (or something that evaluates to a
-number). A word may either give a command or provide an argument to a command. For example,
-:code:`G1 X3` is a valid line of code with two words. :code:`G1` is a command meaning “move in a
-straight line at the programmed feed rate,” and :code:`X3` provides an argument value (the value of
-X should be 3 at the end of the move). Most RS274/NGC commands start with either G or M (for
-miscellaneous). The words for these commands are called “G codes” and “M codes.”
-
-Language View of a Machining Center
------------------------------------
-
-Parameters
-~~~~~~~~~~
-
-In the RS274/NGC language view, a machining center maintains an array of 5400 numerical
-parameters. Many of them have specific uses. The parameter array should persist over time, even if
-the machining center is powered down.
-
-Coordinate Systems
-~~~~~~~~~~~~~~~~~~
-
-In the RS274/NGC language view, a machining center has an absolute coordinate system and nine
-program coordinate systems.
-
-You can set the offsets of the nine program coordinate systems using G10 L2 Pn (n is the number of
-the coordinate system) with values for the axes in terms of the absolute coordinate system.
-
-You can select one of the nine systems by using G54, G55, G56, G57, G58, G59, G59.1, G59.2, or
-G59.3. It is not possible to select the absolute coordinate system directly. You can offset the
-current coordinate system using G92 or G92.3. This offset will then apply to all nine program
-coordinate systems. This offset may be cancelled with G92.1 or G92.2.
-
-You can make straight moves in the absolute machine coordinate system by using G53 with either G0 or
-G1.
-
-Data for coordinate systems is stored in parameters.
-
-During initialization, the coordinate system is selected that is specified by parameter 5220. A
-value of 1 means the first coordinate system (the one G54 activates), a value of 2 means the second
-coordinate system (the one G55 activates), and so on. It is an error for the value of parameter 5220
-to be anything but a whole number between one and nine.
-
-Format of a Line
-----------------
-
-A permissible line of input RS274/NGC code consists of the following, in order, with the restriction
-that there is a maximum (currently 256) to the number of characters allowed on a line.
-
-#. an optional block delete character, which is a slash :code:`/` .
-#. an optional line number.
-#. any number of words, parameter settings, and comments.
-#. an end of line marker (carriage return or line feed or both).
-
-Spaces and tabs are allowed anywhere on a line of code and do not change the meaning of the line,
-except inside comments. This makes some strange-looking input legal. The line :code:`g0x +0. 12 34y
-7` is equivalent to :code:`g0 x+0.1234 y7`, for example.
-
-Blank lines are allowed in the input. They are to be ignored.
-
-Input is case insensitive, except in comments, i.e., any letter outside a comment may be in upper or
-lower case without changing the meaning of a line.
-
-Line Number
-~~~~~~~~~~~
-
-A line number is the letter :code:`N` followed by an integer (with no sign) between 0 and 99999
-written with no more than five digits (000009 is not OK, for example). Line numbers may be repeated
-or used out of order, although normal practice is to avoid such usage. Line numbers may also be
-skipped, and that is normal practice. A line number is not required to be used, but must be in the
-proper place if used.
-
-Word
-~~~~
-
-A word is a letter other than :code:`N` followed by a real value.
-
-Words may begin with any of the letters shown in the following table. The table includes :code:`N`
-for completeness, even though, as defined above, line numbers are not words. Several letters
-(:code:`I`, :code:`J, K`, :code:`L`, :code:`P`, :code:`R`) may have different meanings in different
-contexts.
-
-Table. Linux CNC Words and their meanings Letter
-
-====== =====================================================
-Letter 	Meaning
-====== =====================================================
-A       A axis of machine
-B       B axis of machine
-C       C axis of machine
-D       Tool radius compensation number
-F       Feed rate
-G       General function (See table Modal Groups)
-H       Tool length offset index
-I       X offset for arcs and G87 canned cycles
-J       Y offset for arcs and G87 canned cycles
-K       Z offset for arcs and G87 canned cycles.
-        Spindle-Motion Ratio for G33 synchronized movements.
-L       Generic parameter word for G10, M66 and others
-M       Miscellaneous function (See table Modal Groups)
-N       Line number
-P       Dwell time in canned cycles and with G4.
-        Key used with G10.
-Q       Feed increment in G73, G83 canned cycles
-R       Arc radius or canned cycle plane
-S       Spindle speed
-T       Tool selection
-U       U axis of machine
-V       V axis of machine
-W       W axis of machine
-X       X axis of machine
-Y       Y axis of machine
-Z       Z axis of machine
-====== =====================================================
-
-A real value is some collection of characters that can be processed to come up with a number. A real
-value may be an explicit number (such as 341 or -0.8807), a parameter value, an expression, or a
-unary operation value.
-
-Number
-~~~~~
-
-The following rules are used for (explicit) numbers. In these rules a digit is a single character
-between 0 and 9.
-
-* A number consists of (1) an optional plus or minus sign, followed by (2) zero to many digits,
-  followed, possibly, by (3) one decimal point, followed by (4) zero to many digits — provided that
-  there is at least one digit somewhere in the number.
-* There are two kinds of numbers: integers and decimals. An integer does not have a decimal point in
-  it; a decimal does.
-* Numbers may have any number of digits, subject to the limitation on line length.
-* A non-zero number with no sign as the first character is assumed to be positive.  Notice that
-  initial (before the decimal point and the first non-zero digit) and trailing (after the decimal
-  point and the last non-zero digit) zeros are allowed but not required. A number written with
-  initial or trailing zeros will have the same value when it is read as if the extra zeros were not
-  there.
-
-Parameter Value
-~~~~~~~~~~~~~~~
-
-A parameter value is the pound character :code:`#` followed by a real value. The real value must
-evaluate to an integer between 1 and 5399. The integer is a parameter number, and the value of the
-parameter value is whatever number is stored in the numbered parameter.
-
-The :code:`#` character takes precedence over other operations, so that, for example, :code:`#1+2`
-means the number found by adding 2 to the value of parameter 1, not the value found in parameter
-3. Of course, :code:`#[1+2]` does mean the value found in parameter 3. The :code:`#` character may
-be repeated; for example :code:`##2` means the value of the parameter whose index is the (integer)
-value of parameter 2.
-
-Expressions and Binary Operations
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-An expression is a set of characters starting with a left bracket :code:`[` and ending with a
-balancing right bracket :code:`]`. In between the brackets are numbers, parameter values,
-mathematical operations, and other expressions. An expression may be evaluated to produce a
-number. The expressions on a line are evaluated when the line is read, before anything on the line
-is executed. An example of an expression is :code:`[ 1 + acos[0] - [#3 ** [4.0/2]]]`.
-
-Binary operations appear only inside expressions. Nine binary operations are defined. There are four
-basic mathematical operations: addition :code:`+`, subtraction :code:`-`, multiplication :code:`*`,
-and division :code:`/`. There are three logical operations: non-exclusive or :code:`OR`, exclusive
-or :code:`XOR`, and logical and :code:`AND`. The eighth operation is the modulus operation
-:code:`MOD`. The ninth operation is the “power” operation :code:`**` of raising the number on the
-left of the operation to the power on the right.  The binary operations are divided into three
-groups. The first group is: power. The second group is: multiplication, division, and modulus. The
-third group is: addition, subtraction, logical non- exclusive or, logical exclusive or, and logical
-and. If operations are strung together (for example in the expression :code:`[2.0 / 3 * 1.5 - 5.5 /
-11.0]`), operations in the first group are to be performed before operations in the second group and
-operations in the second group before operations in the third group. If an expression contains more
-than one operation from the same group (such as the first / and * in the example), the operation on
-the left is performed first. Thus, the example is equivalent to: :code:`[((2.0 / 3) * 1.5) - (5.5 /
-11.0)]`, which simplifies to :code:`[1.0 - 0.5]`, which is 0.5.
-
-The logical operations and modulus are to be performed on any real numbers, not just on integers.
-The number zero is equivalent to logical false, and any non-zero number is equivalent to logical
-true.
-
-Unary Operation Value
-~~~~~~~~~~~~~~~~~~~~~
-
-A unary operation value is either :code:`ATAN` followed by one expression divided by another
-expression (for example :code:`ATAN[2]/[1+3]`) or any other unary operation name followed by an
-expression (for example :code:`SIN[90]`). The unary operations are: :code:`ABS` (absolute value),
-:code:`ACOS` (arc cosine), :code:`ASIN` (arc sine), :code:`ATAN` (arc tangent), :code:`COS`
-(cosine), :code:`EXP` (e raised to the given power), :code:`FIX` (round down), :code:`FUP` (round
-up), :code:`LN` (natural logarithm), :code:`ROUND` (round to the nearest whole number), :code:`SIN`
-(sine), :code:`SQRT` (square root), and :code:`TAN` (tangent). Arguments to unary operations which
-take angle measures (:code:`COS`, :code:`SIN`, and :code:`TAN`) are in degrees. Values returned by
-unary operations which return angle measures (:code:`ACOS`, :code:`ASIN`, and :code:`ATAN`) are also
-in degrees.
-
-The :code:`FIX` operation rounds towards the left (less positive or more negative) on a number line,
-so that :code:`FIX[2.8] = 2` and :code:`FIX[-2.8] = -3`, for example. The :code:`FUP` operation
-rounds towards the right (more positive or less negative) on a number line; :code:`FUP[2.8] = 3` and
-:code:`FUP[-2.8] = -2`, for example.
-
-Parameter Setting
-~~~~~~~~~~~~~~~~~
-
-A parameter setting is the following four items one after the other: (1) a pound character
-:code:`#`, (2) a real value which evaluates to an integer between 1 and 5399, (3) an equal sign
-:code:`=`, and (4) a real value. For example :code:`#3 = 15` is a parameter setting meaning “set
-parameter 3 to 15.”
-
-A parameter setting does not take effect until after all parameter values on the same line have
-been found. For example, if parameter 3 has been previously set to 15 and the line :code:`#3=6 G1
-x#3` is interpreted, a straight move to a point where x equals 15 will occur and the value of
-parameter 3 will be 6.
-
-Comments and Messages
-~~~~~~~~~~~~~~~~~~~~~
-
-Printable characters and white space inside parentheses is a comment. A left parenthesis always
-starts a comment. The comment ends at the first right parenthesis found thereafter. Once a left
-parenthesis is placed on a line, a matching right parenthesis must appear before the end of the
-line.  Comments may not be nested; it is an error if a left parenthesis is found after the start of
-a comment and before the end of the comment. Here is an example of a line containing a comment:
-:code:`G80 M5 (stop motion)`. Comments do not cause a machining center to do anything.
-
-.. A comment contains a message if “MSG,” appears after the left parenthesis and before any other
-  printing characters. Variants of “MSG,” which include white space and lower case characters are
-  allowed. The rest of the characters before the right parenthesis are considered to be a message.
-  Messages should be displayed on the message display device. Comments not containing messages need
-  not be displayed there.
-
-Item Repeats
-~~~~~~~~~~~~
-
-A line may have any number of :code:`G` words, but two :code:`G` words from the same modal group may
-not appear on the same line.
-
-A line may have zero to four :code:`M` words. Two :code:`M` words from the same modal group may not
-appear on the same line.
-
-For all other legal letters, a line may have only one word beginning with that letter.
-
-If a parameter setting of the same parameter is repeated on a line, :code:`#3=15 #3=6`, for example,
-only the last setting will take effect. It is silly, but not illegal, to set the same parameter
-twice on the same line.
-
-If more than one comment appears on a line, only the last one will be used; each of the other
-comments will be read and its format will be checked, but it will be ignored thereafter. It is
-expected that putting more than one comment on a line will be very rare.
-
-Item order
-~~~~~~~~~~
-
-The three types of item whose order may vary on a line (as given at the beginning of this section)
-are word, parameter setting, and comment. Imagine that these three types of item are divided into
-three groups by type.
-
-The first group (the words) may be reordered in any way without changing the meaning of the line.
-
-If the second group (the parameter settings) is reordered, there will be no change in the meaning of
-the line unless the same parameter is set more than once. In this case, only the last setting of the
-parameter will take effect. For example, after the line :code:`#3=15 #3=6` has been interpreted, the
-value of parameter 3 will be 6. If the order is reversed to :code:`#3=6 #3=15` and the line is
-interpreted, the value of parameter 3 will be 15.
-
-If the third group (the comments) contains more than one comment and is reordered, only the last
-comment will be used.
-
-If each group is kept in order or reordered without changing the meaning of the line, then the three
-groups may be interleaved in any way without changing the meaning of the line. For example, the line
-:code:`g40 g1 #3=15 (foo) #4=-7.0` has five items and means exactly the same thing in any of the 120
-possible orders (such as :code:`#4=-7.0 g1 #3=15 g40 (foo)`) for the five items.
-
-Commands and Machine Modes
-~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-In RS274/NGC, many commands cause a machining center to change from one mode to another, and the
-mode stays active until some other command changes it implicitly or explicitly. Such commands are
-called “modal”. For example, if coolant is turned on, it stays on until it is explicitly turned
-off. The :code:`G` codes for motion are also modal. If a :code:`G1` (straight move) command is given
-on one line, for example, it will be executed again on the next line if one or more axis words is
-available on the line, unless an explicit command is given on that next line using the axis words or
-cancelling motion.
-
-“Non-modal” codes have effect only on the lines on which they occur. For example, :code:`G4` (dwell)
-is non-modal.
-
-Modal Groups
-------------
-
-Modal commands are arranged in sets called “modal groups”, and only one member of a modal group may
-be in force at any given time. In general, a modal group contains commands for which it is logically
-impossible for two members to be in effect at the same time — like measure in inches vs. measure in
-millimeters. A machining center may be in many modes at the same time, with one mode from each modal
-group being in effect.
-
-.. The modal groups are shown in Table 4.
-
-For several modal groups, when a machining center is ready to accept commands, one member of the
-group must be in effect. There are default settings for these modal groups. When the machining
-center is turned on or otherwise re-initialized, the default values are automatically in effect.
-
-Group 1, the first group on the table, is a group of :code:`G` codes for motion. One of these is
-always in effect. That one is called the current motion mode.
-
-It is an error to put a G-code from group 1 and a G-code from group 0 on the same line if both of
-them use axis words. If an axis word-using G-code from group 1 is implicitly in effect on a line (by
-having been activated on an earlier line), and a group 0 G-code that uses axis words appears on the
-line, the activity of the group 1 G-code is suspended for that line. The axis word-using G-codes
-from group 0 are :code:`G10`, :code:`G28`, :code:`G30`, and :code:`G92`.
-
-G and Input Codes
------------------
-
-See ...
-
-..
-  G codes of the RS274/NGC language are shown in Table 5 and described following that.
-
-  In the command prototypes, three dots (...) stand for a real value. As described earlier, a real
-  value may be (1) an explicit number, 4, for example, (2) an expression, :code:`[2+2]`, for example,
-  (3) a parameter value, #88, for example, or (4) a unary function value, :code:`acos[0]`, for
-  example.  In most cases, if axis words (any or all of X..., Y..., Z..., A..., B..., C...) are given,
-  they specify a destination point. Axis numbers are in the currently active coordinate system, unless
-  explicitly described as being in the absolute coordinate system. Where axis words are optional, any
-  omitted axes will have their current value. Any items in the command prototypes not explicitly
-  described as optional are required. It is an error if a required item is omitted.
-
-  In the prototypes, the values following letters are often given as explicit numbers. Unless stated
-  otherwise, the explicit numbers can be real values. For example, :code:`G10 L2` could equally well
-  be written :code:`G[2*5] L[1+1]`. If the value of parameter 100 were 2, :code:`G10 L#100` would also
-  mean the same. Using real values which are not explicit numbers as just shown in the examples is
-  rarely useful.
-
-  If L... is written in a prototype the “...” will often be referred to as the “L number”. Similarly the
-  “...” in H... may be called the “H number”, and so on for any other letter.
-
-Order of Execution
-------------------
-
-The order of execution of items on a line is critical to safe and effective machine operation. Items
-are executed in a particular order if they occur on the same line.
-
-"""
diff --git a/PythonicGcodeMachine/Gcode/LinuxCnc/__init__.py b/PythonicGcodeMachine/Gcode/LinuxCnc/__init__.py
index 37fdd45a0d6bed35fad763c9e5dbb87020fe76cb..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391 100644
--- a/PythonicGcodeMachine/Gcode/LinuxCnc/__init__.py
+++ b/PythonicGcodeMachine/Gcode/LinuxCnc/__init__.py
@@ -1,384 +0,0 @@
-####################################################################################################
-#
-# PythonicGcodeMachine - @licence_header_description@
-# Copyright (C) 2018 Fabrice Salvaire
-#
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
-#
-####################################################################################################
-
-"""Module to implement the G-code language.
-
-History
--------
-
-The G-code language, also called RS-274, is a programming language for numerical control.  It was
-developed by the EIA in the early 1960s, and finally standardised by ISO in February 1980 as RS274D
-/ ISO 6983.
-
-The G-code language has several flavours and historical versions. A list of reference documents
-follows :
-
-* The NIST RS274NGC Interpreter - Version 3, T. Kramer, F. Proctor, E. Messina, National Institute
-  of Standards and Technology, NISTIR 6556, August 17, 2000
-* The documentation of the `Linux CNC <http://linuxcnc.org>`_ project, formerly Enhanced Machine
-  Controller developed at NIST,
-* EIA Standard RS-274-D Interchangeable Variable Block Data Format for Positioning, Contouring, and
-  Contouring/Positioning Numerically Controlled Machines, 2001 Eye Street, NW, Washington,
-  D.C. 20006: Electronic Industries Association, February 1979
-
-Overview
---------
-
-The RS274/NGC language is based on lines of code. Each line (also called a “block”) may include
-commands to a machining center to do several different things.
-
-A typical line of code consists of an optional line number at the beginning followed by one or more
-“words.” A word consists of a letter followed by a number (or something that evaluates to a
-number). A word may either give a command or provide an argument to a command. For example,
-:code:`G1 X3` is a valid line of code with two words. :code:`G1` is a command meaning “move in a
-straight line at the programmed feed rate,” and :code:`X3` provides an argument value (the value of
-X should be 3 at the end of the move). Most RS274/NGC commands start with either G or M (for
-miscellaneous). The words for these commands are called “G codes” and “M codes.”
-
-Language View of a Machining Center
------------------------------------
-
-Parameters
-~~~~~~~~~~
-
-In the RS274/NGC language view, a machining center maintains an array of 5400 numerical
-parameters. Many of them have specific uses. The parameter array should persist over time, even if
-the machining center is powered down.
-
-Coordinate Systems
-~~~~~~~~~~~~~~~~~~
-
-In the RS274/NGC language view, a machining center has an absolute coordinate system and nine
-program coordinate systems.
-
-You can set the offsets of the nine program coordinate systems using G10 L2 Pn (n is the number of
-the coordinate system) with values for the axes in terms of the absolute coordinate system.
-
-You can select one of the nine systems by using G54, G55, G56, G57, G58, G59, G59.1, G59.2, or
-G59.3. It is not possible to select the absolute coordinate system directly. You can offset the
-current coordinate system using G92 or G92.3. This offset will then apply to all nine program
-coordinate systems. This offset may be cancelled with G92.1 or G92.2.
-
-You can make straight moves in the absolute machine coordinate system by using G53 with either G0 or
-G1.
-
-Data for coordinate systems is stored in parameters.
-
-During initialization, the coordinate system is selected that is specified by parameter 5220. A
-value of 1 means the first coordinate system (the one G54 activates), a value of 2 means the second
-coordinate system (the one G55 activates), and so on. It is an error for the value of parameter 5220
-to be anything but a whole number between one and nine.
-
-Format of a Line
-----------------
-
-A permissible line of input RS274/NGC code consists of the following, in order, with the restriction
-that there is a maximum (currently 256) to the number of characters allowed on a line.
-
-#. an optional block delete character, which is a slash :code:`/` .
-#. an optional line number.
-#. any number of words, parameter settings, and comments.
-#. an end of line marker (carriage return or line feed or both).
-
-Spaces and tabs are allowed anywhere on a line of code and do not change the meaning of the line,
-except inside comments. This makes some strange-looking input legal. The line :code:`g0x +0. 12 34y
-7` is equivalent to :code:`g0 x+0.1234 y7`, for example.
-
-Blank lines are allowed in the input. They are to be ignored.
-
-Input is case insensitive, except in comments, i.e., any letter outside a comment may be in upper or
-lower case without changing the meaning of a line.
-
-Line Number
-~~~~~~~~~~~
-
-A line number is the letter :code:`N` followed by an integer (with no sign) between 0 and 99999
-written with no more than five digits (000009 is not OK, for example). Line numbers may be repeated
-or used out of order, although normal practice is to avoid such usage. Line numbers may also be
-skipped, and that is normal practice. A line number is not required to be used, but must be in the
-proper place if used.
-
-Word
-~~~~
-
-A word is a letter other than :code:`N` followed by a real value.
-
-Words may begin with any of the letters shown in the following table. The table includes :code:`N`
-for completeness, even though, as defined above, line numbers are not words. Several letters
-(:code:`I`, :code:`J, K`, :code:`L`, :code:`P`, :code:`R`) may have different meanings in different
-contexts.
-
-Table. Linux CNC Words and their meanings Letter
-
-====== =====================================================
-Letter 	Meaning
-====== =====================================================
-A       A axis of machine
-B       B axis of machine
-C       C axis of machine
-D       Tool radius compensation number
-F       Feed rate
-G       General function (See table Modal Groups)
-H       Tool length offset index
-I       X offset for arcs and G87 canned cycles
-J       Y offset for arcs and G87 canned cycles
-K       Z offset for arcs and G87 canned cycles.
-        Spindle-Motion Ratio for G33 synchronized movements.
-L       Generic parameter word for G10, M66 and others
-M       Miscellaneous function (See table Modal Groups)
-N       Line number
-P       Dwell time in canned cycles and with G4.
-        Key used with G10.
-Q       Feed increment in G73, G83 canned cycles
-R       Arc radius or canned cycle plane
-S       Spindle speed
-T       Tool selection
-U       U axis of machine
-V       V axis of machine
-W       W axis of machine
-X       X axis of machine
-Y       Y axis of machine
-Z       Z axis of machine
-====== =====================================================
-
-A real value is some collection of characters that can be processed to come up with a number. A real
-value may be an explicit number (such as 341 or -0.8807), a parameter value, an expression, or a
-unary operation value.
-
-Number
-~~~~~
-
-The following rules are used for (explicit) numbers. In these rules a digit is a single character
-between 0 and 9.
-
-* A number consists of (1) an optional plus or minus sign, followed by (2) zero to many digits,
-  followed, possibly, by (3) one decimal point, followed by (4) zero to many digits — provided that
-  there is at least one digit somewhere in the number.
-* There are two kinds of numbers: integers and decimals. An integer does not have a decimal point in
-  it; a decimal does.
-* Numbers may have any number of digits, subject to the limitation on line length.
-* A non-zero number with no sign as the first character is assumed to be positive.  Notice that
-  initial (before the decimal point and the first non-zero digit) and trailing (after the decimal
-  point and the last non-zero digit) zeros are allowed but not required. A number written with
-  initial or trailing zeros will have the same value when it is read as if the extra zeros were not
-  there.
-
-Parameter Value
-~~~~~~~~~~~~~~~
-
-A parameter value is the pound character :code:`#` followed by a real value. The real value must
-evaluate to an integer between 1 and 5399. The integer is a parameter number, and the value of the
-parameter value is whatever number is stored in the numbered parameter.
-
-The :code:`#` character takes precedence over other operations, so that, for example, :code:`#1+2`
-means the number found by adding 2 to the value of parameter 1, not the value found in parameter
-3. Of course, :code:`#[1+2]` does mean the value found in parameter 3. The :code:`#` character may
-be repeated; for example :code:`##2` means the value of the parameter whose index is the (integer)
-value of parameter 2.
-
-Expressions and Binary Operations
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-An expression is a set of characters starting with a left bracket :code:`[` and ending with a
-balancing right bracket :code:`]`. In between the brackets are numbers, parameter values,
-mathematical operations, and other expressions. An expression may be evaluated to produce a
-number. The expressions on a line are evaluated when the line is read, before anything on the line
-is executed. An example of an expression is :code:`[ 1 + acos[0] - [#3 ** [4.0/2]]]`.
-
-Binary operations appear only inside expressions. Nine binary operations are defined. There are four
-basic mathematical operations: addition :code:`+`, subtraction :code:`-`, multiplication :code:`*`,
-and division :code:`/`. There are three logical operations: non-exclusive or :code:`OR`, exclusive
-or :code:`XOR`, and logical and :code:`AND`. The eighth operation is the modulus operation
-:code:`MOD`. The ninth operation is the “power” operation :code:`**` of raising the number on the
-left of the operation to the power on the right.  The binary operations are divided into three
-groups. The first group is: power. The second group is: multiplication, division, and modulus. The
-third group is: addition, subtraction, logical non- exclusive or, logical exclusive or, and logical
-and. If operations are strung together (for example in the expression :code:`[2.0 / 3 * 1.5 - 5.5 /
-11.0]`), operations in the first group are to be performed before operations in the second group and
-operations in the second group before operations in the third group. If an expression contains more
-than one operation from the same group (such as the first / and * in the example), the operation on
-the left is performed first. Thus, the example is equivalent to: :code:`[((2.0 / 3) * 1.5) - (5.5 /
-11.0)]`, which simplifies to :code:`[1.0 - 0.5]`, which is 0.5.
-
-The logical operations and modulus are to be performed on any real numbers, not just on integers.
-The number zero is equivalent to logical false, and any non-zero number is equivalent to logical
-true.
-
-Unary Operation Value
-~~~~~~~~~~~~~~~~~~~~~
-
-A unary operation value is either :code:`ATAN` followed by one expression divided by another
-expression (for example :code:`ATAN[2]/[1+3]`) or any other unary operation name followed by an
-expression (for example :code:`SIN[90]`). The unary operations are: :code:`ABS` (absolute value),
-:code:`ACOS` (arc cosine), :code:`ASIN` (arc sine), :code:`ATAN` (arc tangent), :code:`COS`
-(cosine), :code:`EXP` (e raised to the given power), :code:`FIX` (round down), :code:`FUP` (round
-up), :code:`LN` (natural logarithm), :code:`ROUND` (round to the nearest whole number), :code:`SIN`
-(sine), :code:`SQRT` (square root), and :code:`TAN` (tangent). Arguments to unary operations which
-take angle measures (:code:`COS`, :code:`SIN`, and :code:`TAN`) are in degrees. Values returned by
-unary operations which return angle measures (:code:`ACOS`, :code:`ASIN`, and :code:`ATAN`) are also
-in degrees.
-
-The :code:`FIX` operation rounds towards the left (less positive or more negative) on a number line,
-so that :code:`FIX[2.8] = 2` and :code:`FIX[-2.8] = -3`, for example. The :code:`FUP` operation
-rounds towards the right (more positive or less negative) on a number line; :code:`FUP[2.8] = 3` and
-:code:`FUP[-2.8] = -2`, for example.
-
-Parameter Setting
-~~~~~~~~~~~~~~~~~
-
-A parameter setting is the following four items one after the other: (1) a pound character
-:code:`#`, (2) a real value which evaluates to an integer between 1 and 5399, (3) an equal sign
-:code:`=`, and (4) a real value. For example :code:`#3 = 15` is a parameter setting meaning “set
-parameter 3 to 15.”
-
-A parameter setting does not take effect until after all parameter values on the same line have
-been found. For example, if parameter 3 has been previously set to 15 and the line :code:`#3=6 G1
-x#3` is interpreted, a straight move to a point where x equals 15 will occur and the value of
-parameter 3 will be 6.
-
-Comments and Messages
-~~~~~~~~~~~~~~~~~~~~~
-
-Printable characters and white space inside parentheses is a comment. A left parenthesis always
-starts a comment. The comment ends at the first right parenthesis found thereafter. Once a left
-parenthesis is placed on a line, a matching right parenthesis must appear before the end of the
-line.  Comments may not be nested; it is an error if a left parenthesis is found after the start of
-a comment and before the end of the comment. Here is an example of a line containing a comment:
-:code:`G80 M5 (stop motion)`. Comments do not cause a machining center to do anything.
-
-.. A comment contains a message if “MSG,” appears after the left parenthesis and before any other
-  printing characters. Variants of “MSG,” which include white space and lower case characters are
-  allowed. The rest of the characters before the right parenthesis are considered to be a message.
-  Messages should be displayed on the message display device. Comments not containing messages need
-  not be displayed there.
-
-Item Repeats
-~~~~~~~~~~~~
-
-A line may have any number of :code:`G` words, but two :code:`G` words from the same modal group may
-not appear on the same line.
-
-A line may have zero to four :code:`M` words. Two :code:`M` words from the same modal group may not
-appear on the same line.
-
-For all other legal letters, a line may have only one word beginning with that letter.
-
-If a parameter setting of the same parameter is repeated on a line, :code:`#3=15 #3=6`, for example,
-only the last setting will take effect. It is silly, but not illegal, to set the same parameter
-twice on the same line.
-
-If more than one comment appears on a line, only the last one will be used; each of the other
-comments will be read and its format will be checked, but it will be ignored thereafter. It is
-expected that putting more than one comment on a line will be very rare.
-
-Item order
-~~~~~~~~~~
-
-The three types of item whose order may vary on a line (as given at the beginning of this section)
-are word, parameter setting, and comment. Imagine that these three types of item are divided into
-three groups by type.
-
-The first group (the words) may be reordered in any way without changing the meaning of the line.
-
-If the second group (the parameter settings) is reordered, there will be no change in the meaning of
-the line unless the same parameter is set more than once. In this case, only the last setting of the
-parameter will take effect. For example, after the line :code:`#3=15 #3=6` has been interpreted, the
-value of parameter 3 will be 6. If the order is reversed to :code:`#3=6 #3=15` and the line is
-interpreted, the value of parameter 3 will be 15.
-
-If the third group (the comments) contains more than one comment and is reordered, only the last
-comment will be used.
-
-If each group is kept in order or reordered without changing the meaning of the line, then the three
-groups may be interleaved in any way without changing the meaning of the line. For example, the line
-:code:`g40 g1 #3=15 (foo) #4=-7.0` has five items and means exactly the same thing in any of the 120
-possible orders (such as :code:`#4=-7.0 g1 #3=15 g40 (foo)`) for the five items.
-
-Commands and Machine Modes
-~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-In RS274/NGC, many commands cause a machining center to change from one mode to another, and the
-mode stays active until some other command changes it implicitly or explicitly. Such commands are
-called “modal”. For example, if coolant is turned on, it stays on until it is explicitly turned
-off. The :code:`G` codes for motion are also modal. If a :code:`G1` (straight move) command is given
-on one line, for example, it will be executed again on the next line if one or more axis words is
-available on the line, unless an explicit command is given on that next line using the axis words or
-cancelling motion.
-
-“Non-modal” codes have effect only on the lines on which they occur. For example, :code:`G4` (dwell)
-is non-modal.
-
-Modal Groups
-------------
-
-Modal commands are arranged in sets called “modal groups”, and only one member of a modal group may
-be in force at any given time. In general, a modal group contains commands for which it is logically
-impossible for two members to be in effect at the same time — like measure in inches vs. measure in
-millimeters. A machining center may be in many modes at the same time, with one mode from each modal
-group being in effect.
-
-.. The modal groups are shown in Table 4.
-
-For several modal groups, when a machining center is ready to accept commands, one member of the
-group must be in effect. There are default settings for these modal groups. When the machining
-center is turned on or otherwise re-initialized, the default values are automatically in effect.
-
-Group 1, the first group on the table, is a group of :code:`G` codes for motion. One of these is
-always in effect. That one is called the current motion mode.
-
-It is an error to put a G-code from group 1 and a G-code from group 0 on the same line if both of
-them use axis words. If an axis word-using G-code from group 1 is implicitly in effect on a line (by
-having been activated on an earlier line), and a group 0 G-code that uses axis words appears on the
-line, the activity of the group 1 G-code is suspended for that line. The axis word-using G-codes
-from group 0 are :code:`G10`, :code:`G28`, :code:`G30`, and :code:`G92`.
-
-G and Input Codes
------------------
-
-See ...
-
-..
-  G codes of the RS274/NGC language are shown in Table 5 and described following that.
-
-  In the command prototypes, three dots (...) stand for a real value. As described earlier, a real
-  value may be (1) an explicit number, 4, for example, (2) an expression, :code:`[2+2]`, for example,
-  (3) a parameter value, #88, for example, or (4) a unary function value, :code:`acos[0]`, for
-  example.  In most cases, if axis words (any or all of X..., Y..., Z..., A..., B..., C...) are given,
-  they specify a destination point. Axis numbers are in the currently active coordinate system, unless
-  explicitly described as being in the absolute coordinate system. Where axis words are optional, any
-  omitted axes will have their current value. Any items in the command prototypes not explicitly
-  described as optional are required. It is an error if a required item is omitted.
-
-  In the prototypes, the values following letters are often given as explicit numbers. Unless stated
-  otherwise, the explicit numbers can be real values. For example, :code:`G10 L2` could equally well
-  be written :code:`G[2*5] L[1+1]`. If the value of parameter 100 were 2, :code:`G10 L#100` would also
-  mean the same. Using real values which are not explicit numbers as just shown in the examples is
-  rarely useful.
-
-  If L... is written in a prototype the “...” will often be referred to as the “L number”. Similarly the
-  “...” in H... may be called the “H number”, and so on for any other letter.
-
-Order of Execution
-------------------
-
-The order of execution of items on a line is critical to safe and effective machine operation. Items
-are executed in a particular order if they occur on the same line.
-
-"""
diff --git a/PythonicGcodeMachine/Gcode/MachineKit/__init__.py b/PythonicGcodeMachine/Gcode/MachineKit/__init__.py
index 37fdd45a0d6bed35fad763c9e5dbb87020fe76cb..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391 100644
--- a/PythonicGcodeMachine/Gcode/MachineKit/__init__.py
+++ b/PythonicGcodeMachine/Gcode/MachineKit/__init__.py
@@ -1,384 +0,0 @@
-####################################################################################################
-#
-# PythonicGcodeMachine - @licence_header_description@
-# Copyright (C) 2018 Fabrice Salvaire
-#
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
-#
-####################################################################################################
-
-"""Module to implement the G-code language.
-
-History
--------
-
-The G-code language, also called RS-274, is a programming language for numerical control.  It was
-developed by the EIA in the early 1960s, and finally standardised by ISO in February 1980 as RS274D
-/ ISO 6983.
-
-The G-code language has several flavours and historical versions. A list of reference documents
-follows :
-
-* The NIST RS274NGC Interpreter - Version 3, T. Kramer, F. Proctor, E. Messina, National Institute
-  of Standards and Technology, NISTIR 6556, August 17, 2000
-* The documentation of the `Linux CNC <http://linuxcnc.org>`_ project, formerly Enhanced Machine
-  Controller developed at NIST,
-* EIA Standard RS-274-D Interchangeable Variable Block Data Format for Positioning, Contouring, and
-  Contouring/Positioning Numerically Controlled Machines, 2001 Eye Street, NW, Washington,
-  D.C. 20006: Electronic Industries Association, February 1979
-
-Overview
---------
-
-The RS274/NGC language is based on lines of code. Each line (also called a “block”) may include
-commands to a machining center to do several different things.
-
-A typical line of code consists of an optional line number at the beginning followed by one or more
-“words.” A word consists of a letter followed by a number (or something that evaluates to a
-number). A word may either give a command or provide an argument to a command. For example,
-:code:`G1 X3` is a valid line of code with two words. :code:`G1` is a command meaning “move in a
-straight line at the programmed feed rate,” and :code:`X3` provides an argument value (the value of
-X should be 3 at the end of the move). Most RS274/NGC commands start with either G or M (for
-miscellaneous). The words for these commands are called “G codes” and “M codes.”
-
-Language View of a Machining Center
------------------------------------
-
-Parameters
-~~~~~~~~~~
-
-In the RS274/NGC language view, a machining center maintains an array of 5400 numerical
-parameters. Many of them have specific uses. The parameter array should persist over time, even if
-the machining center is powered down.
-
-Coordinate Systems
-~~~~~~~~~~~~~~~~~~
-
-In the RS274/NGC language view, a machining center has an absolute coordinate system and nine
-program coordinate systems.
-
-You can set the offsets of the nine program coordinate systems using G10 L2 Pn (n is the number of
-the coordinate system) with values for the axes in terms of the absolute coordinate system.
-
-You can select one of the nine systems by using G54, G55, G56, G57, G58, G59, G59.1, G59.2, or
-G59.3. It is not possible to select the absolute coordinate system directly. You can offset the
-current coordinate system using G92 or G92.3. This offset will then apply to all nine program
-coordinate systems. This offset may be cancelled with G92.1 or G92.2.
-
-You can make straight moves in the absolute machine coordinate system by using G53 with either G0 or
-G1.
-
-Data for coordinate systems is stored in parameters.
-
-During initialization, the coordinate system is selected that is specified by parameter 5220. A
-value of 1 means the first coordinate system (the one G54 activates), a value of 2 means the second
-coordinate system (the one G55 activates), and so on. It is an error for the value of parameter 5220
-to be anything but a whole number between one and nine.
-
-Format of a Line
-----------------
-
-A permissible line of input RS274/NGC code consists of the following, in order, with the restriction
-that there is a maximum (currently 256) to the number of characters allowed on a line.
-
-#. an optional block delete character, which is a slash :code:`/` .
-#. an optional line number.
-#. any number of words, parameter settings, and comments.
-#. an end of line marker (carriage return or line feed or both).
-
-Spaces and tabs are allowed anywhere on a line of code and do not change the meaning of the line,
-except inside comments. This makes some strange-looking input legal. The line :code:`g0x +0. 12 34y
-7` is equivalent to :code:`g0 x+0.1234 y7`, for example.
-
-Blank lines are allowed in the input. They are to be ignored.
-
-Input is case insensitive, except in comments, i.e., any letter outside a comment may be in upper or
-lower case without changing the meaning of a line.
-
-Line Number
-~~~~~~~~~~~
-
-A line number is the letter :code:`N` followed by an integer (with no sign) between 0 and 99999
-written with no more than five digits (000009 is not OK, for example). Line numbers may be repeated
-or used out of order, although normal practice is to avoid such usage. Line numbers may also be
-skipped, and that is normal practice. A line number is not required to be used, but must be in the
-proper place if used.
-
-Word
-~~~~
-
-A word is a letter other than :code:`N` followed by a real value.
-
-Words may begin with any of the letters shown in the following table. The table includes :code:`N`
-for completeness, even though, as defined above, line numbers are not words. Several letters
-(:code:`I`, :code:`J, K`, :code:`L`, :code:`P`, :code:`R`) may have different meanings in different
-contexts.
-
-Table. Linux CNC Words and their meanings Letter
-
-====== =====================================================
-Letter 	Meaning
-====== =====================================================
-A       A axis of machine
-B       B axis of machine
-C       C axis of machine
-D       Tool radius compensation number
-F       Feed rate
-G       General function (See table Modal Groups)
-H       Tool length offset index
-I       X offset for arcs and G87 canned cycles
-J       Y offset for arcs and G87 canned cycles
-K       Z offset for arcs and G87 canned cycles.
-        Spindle-Motion Ratio for G33 synchronized movements.
-L       Generic parameter word for G10, M66 and others
-M       Miscellaneous function (See table Modal Groups)
-N       Line number
-P       Dwell time in canned cycles and with G4.
-        Key used with G10.
-Q       Feed increment in G73, G83 canned cycles
-R       Arc radius or canned cycle plane
-S       Spindle speed
-T       Tool selection
-U       U axis of machine
-V       V axis of machine
-W       W axis of machine
-X       X axis of machine
-Y       Y axis of machine
-Z       Z axis of machine
-====== =====================================================
-
-A real value is some collection of characters that can be processed to come up with a number. A real
-value may be an explicit number (such as 341 or -0.8807), a parameter value, an expression, or a
-unary operation value.
-
-Number
-~~~~~
-
-The following rules are used for (explicit) numbers. In these rules a digit is a single character
-between 0 and 9.
-
-* A number consists of (1) an optional plus or minus sign, followed by (2) zero to many digits,
-  followed, possibly, by (3) one decimal point, followed by (4) zero to many digits — provided that
-  there is at least one digit somewhere in the number.
-* There are two kinds of numbers: integers and decimals. An integer does not have a decimal point in
-  it; a decimal does.
-* Numbers may have any number of digits, subject to the limitation on line length.
-* A non-zero number with no sign as the first character is assumed to be positive.  Notice that
-  initial (before the decimal point and the first non-zero digit) and trailing (after the decimal
-  point and the last non-zero digit) zeros are allowed but not required. A number written with
-  initial or trailing zeros will have the same value when it is read as if the extra zeros were not
-  there.
-
-Parameter Value
-~~~~~~~~~~~~~~~
-
-A parameter value is the pound character :code:`#` followed by a real value. The real value must
-evaluate to an integer between 1 and 5399. The integer is a parameter number, and the value of the
-parameter value is whatever number is stored in the numbered parameter.
-
-The :code:`#` character takes precedence over other operations, so that, for example, :code:`#1+2`
-means the number found by adding 2 to the value of parameter 1, not the value found in parameter
-3. Of course, :code:`#[1+2]` does mean the value found in parameter 3. The :code:`#` character may
-be repeated; for example :code:`##2` means the value of the parameter whose index is the (integer)
-value of parameter 2.
-
-Expressions and Binary Operations
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-An expression is a set of characters starting with a left bracket :code:`[` and ending with a
-balancing right bracket :code:`]`. In between the brackets are numbers, parameter values,
-mathematical operations, and other expressions. An expression may be evaluated to produce a
-number. The expressions on a line are evaluated when the line is read, before anything on the line
-is executed. An example of an expression is :code:`[ 1 + acos[0] - [#3 ** [4.0/2]]]`.
-
-Binary operations appear only inside expressions. Nine binary operations are defined. There are four
-basic mathematical operations: addition :code:`+`, subtraction :code:`-`, multiplication :code:`*`,
-and division :code:`/`. There are three logical operations: non-exclusive or :code:`OR`, exclusive
-or :code:`XOR`, and logical and :code:`AND`. The eighth operation is the modulus operation
-:code:`MOD`. The ninth operation is the “power” operation :code:`**` of raising the number on the
-left of the operation to the power on the right.  The binary operations are divided into three
-groups. The first group is: power. The second group is: multiplication, division, and modulus. The
-third group is: addition, subtraction, logical non- exclusive or, logical exclusive or, and logical
-and. If operations are strung together (for example in the expression :code:`[2.0 / 3 * 1.5 - 5.5 /
-11.0]`), operations in the first group are to be performed before operations in the second group and
-operations in the second group before operations in the third group. If an expression contains more
-than one operation from the same group (such as the first / and * in the example), the operation on
-the left is performed first. Thus, the example is equivalent to: :code:`[((2.0 / 3) * 1.5) - (5.5 /
-11.0)]`, which simplifies to :code:`[1.0 - 0.5]`, which is 0.5.
-
-The logical operations and modulus are to be performed on any real numbers, not just on integers.
-The number zero is equivalent to logical false, and any non-zero number is equivalent to logical
-true.
-
-Unary Operation Value
-~~~~~~~~~~~~~~~~~~~~~
-
-A unary operation value is either :code:`ATAN` followed by one expression divided by another
-expression (for example :code:`ATAN[2]/[1+3]`) or any other unary operation name followed by an
-expression (for example :code:`SIN[90]`). The unary operations are: :code:`ABS` (absolute value),
-:code:`ACOS` (arc cosine), :code:`ASIN` (arc sine), :code:`ATAN` (arc tangent), :code:`COS`
-(cosine), :code:`EXP` (e raised to the given power), :code:`FIX` (round down), :code:`FUP` (round
-up), :code:`LN` (natural logarithm), :code:`ROUND` (round to the nearest whole number), :code:`SIN`
-(sine), :code:`SQRT` (square root), and :code:`TAN` (tangent). Arguments to unary operations which
-take angle measures (:code:`COS`, :code:`SIN`, and :code:`TAN`) are in degrees. Values returned by
-unary operations which return angle measures (:code:`ACOS`, :code:`ASIN`, and :code:`ATAN`) are also
-in degrees.
-
-The :code:`FIX` operation rounds towards the left (less positive or more negative) on a number line,
-so that :code:`FIX[2.8] = 2` and :code:`FIX[-2.8] = -3`, for example. The :code:`FUP` operation
-rounds towards the right (more positive or less negative) on a number line; :code:`FUP[2.8] = 3` and
-:code:`FUP[-2.8] = -2`, for example.
-
-Parameter Setting
-~~~~~~~~~~~~~~~~~
-
-A parameter setting is the following four items one after the other: (1) a pound character
-:code:`#`, (2) a real value which evaluates to an integer between 1 and 5399, (3) an equal sign
-:code:`=`, and (4) a real value. For example :code:`#3 = 15` is a parameter setting meaning “set
-parameter 3 to 15.”
-
-A parameter setting does not take effect until after all parameter values on the same line have
-been found. For example, if parameter 3 has been previously set to 15 and the line :code:`#3=6 G1
-x#3` is interpreted, a straight move to a point where x equals 15 will occur and the value of
-parameter 3 will be 6.
-
-Comments and Messages
-~~~~~~~~~~~~~~~~~~~~~
-
-Printable characters and white space inside parentheses is a comment. A left parenthesis always
-starts a comment. The comment ends at the first right parenthesis found thereafter. Once a left
-parenthesis is placed on a line, a matching right parenthesis must appear before the end of the
-line.  Comments may not be nested; it is an error if a left parenthesis is found after the start of
-a comment and before the end of the comment. Here is an example of a line containing a comment:
-:code:`G80 M5 (stop motion)`. Comments do not cause a machining center to do anything.
-
-.. A comment contains a message if “MSG,” appears after the left parenthesis and before any other
-  printing characters. Variants of “MSG,” which include white space and lower case characters are
-  allowed. The rest of the characters before the right parenthesis are considered to be a message.
-  Messages should be displayed on the message display device. Comments not containing messages need
-  not be displayed there.
-
-Item Repeats
-~~~~~~~~~~~~
-
-A line may have any number of :code:`G` words, but two :code:`G` words from the same modal group may
-not appear on the same line.
-
-A line may have zero to four :code:`M` words. Two :code:`M` words from the same modal group may not
-appear on the same line.
-
-For all other legal letters, a line may have only one word beginning with that letter.
-
-If a parameter setting of the same parameter is repeated on a line, :code:`#3=15 #3=6`, for example,
-only the last setting will take effect. It is silly, but not illegal, to set the same parameter
-twice on the same line.
-
-If more than one comment appears on a line, only the last one will be used; each of the other
-comments will be read and its format will be checked, but it will be ignored thereafter. It is
-expected that putting more than one comment on a line will be very rare.
-
-Item order
-~~~~~~~~~~
-
-The three types of item whose order may vary on a line (as given at the beginning of this section)
-are word, parameter setting, and comment. Imagine that these three types of item are divided into
-three groups by type.
-
-The first group (the words) may be reordered in any way without changing the meaning of the line.
-
-If the second group (the parameter settings) is reordered, there will be no change in the meaning of
-the line unless the same parameter is set more than once. In this case, only the last setting of the
-parameter will take effect. For example, after the line :code:`#3=15 #3=6` has been interpreted, the
-value of parameter 3 will be 6. If the order is reversed to :code:`#3=6 #3=15` and the line is
-interpreted, the value of parameter 3 will be 15.
-
-If the third group (the comments) contains more than one comment and is reordered, only the last
-comment will be used.
-
-If each group is kept in order or reordered without changing the meaning of the line, then the three
-groups may be interleaved in any way without changing the meaning of the line. For example, the line
-:code:`g40 g1 #3=15 (foo) #4=-7.0` has five items and means exactly the same thing in any of the 120
-possible orders (such as :code:`#4=-7.0 g1 #3=15 g40 (foo)`) for the five items.
-
-Commands and Machine Modes
-~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-In RS274/NGC, many commands cause a machining center to change from one mode to another, and the
-mode stays active until some other command changes it implicitly or explicitly. Such commands are
-called “modal”. For example, if coolant is turned on, it stays on until it is explicitly turned
-off. The :code:`G` codes for motion are also modal. If a :code:`G1` (straight move) command is given
-on one line, for example, it will be executed again on the next line if one or more axis words is
-available on the line, unless an explicit command is given on that next line using the axis words or
-cancelling motion.
-
-“Non-modal” codes have effect only on the lines on which they occur. For example, :code:`G4` (dwell)
-is non-modal.
-
-Modal Groups
-------------
-
-Modal commands are arranged in sets called “modal groups”, and only one member of a modal group may
-be in force at any given time. In general, a modal group contains commands for which it is logically
-impossible for two members to be in effect at the same time — like measure in inches vs. measure in
-millimeters. A machining center may be in many modes at the same time, with one mode from each modal
-group being in effect.
-
-.. The modal groups are shown in Table 4.
-
-For several modal groups, when a machining center is ready to accept commands, one member of the
-group must be in effect. There are default settings for these modal groups. When the machining
-center is turned on or otherwise re-initialized, the default values are automatically in effect.
-
-Group 1, the first group on the table, is a group of :code:`G` codes for motion. One of these is
-always in effect. That one is called the current motion mode.
-
-It is an error to put a G-code from group 1 and a G-code from group 0 on the same line if both of
-them use axis words. If an axis word-using G-code from group 1 is implicitly in effect on a line (by
-having been activated on an earlier line), and a group 0 G-code that uses axis words appears on the
-line, the activity of the group 1 G-code is suspended for that line. The axis word-using G-codes
-from group 0 are :code:`G10`, :code:`G28`, :code:`G30`, and :code:`G92`.
-
-G and Input Codes
------------------
-
-See ...
-
-..
-  G codes of the RS274/NGC language are shown in Table 5 and described following that.
-
-  In the command prototypes, three dots (...) stand for a real value. As described earlier, a real
-  value may be (1) an explicit number, 4, for example, (2) an expression, :code:`[2+2]`, for example,
-  (3) a parameter value, #88, for example, or (4) a unary function value, :code:`acos[0]`, for
-  example.  In most cases, if axis words (any or all of X..., Y..., Z..., A..., B..., C...) are given,
-  they specify a destination point. Axis numbers are in the currently active coordinate system, unless
-  explicitly described as being in the absolute coordinate system. Where axis words are optional, any
-  omitted axes will have their current value. Any items in the command prototypes not explicitly
-  described as optional are required. It is an error if a required item is omitted.
-
-  In the prototypes, the values following letters are often given as explicit numbers. Unless stated
-  otherwise, the explicit numbers can be real values. For example, :code:`G10 L2` could equally well
-  be written :code:`G[2*5] L[1+1]`. If the value of parameter 100 were 2, :code:`G10 L#100` would also
-  mean the same. Using real values which are not explicit numbers as just shown in the examples is
-  rarely useful.
-
-  If L... is written in a prototype the “...” will often be referred to as the “L number”. Similarly the
-  “...” in H... may be called the “H number”, and so on for any other letter.
-
-Order of Execution
-------------------
-
-The order of execution of items on a line is critical to safe and effective machine operation. Items
-are executed in a particular order if they occur on the same line.
-
-"""
diff --git a/PythonicGcodeMachine/Gcode/__init__.py b/PythonicGcodeMachine/Gcode/__init__.py
index 37fdd45a0d6bed35fad763c9e5dbb87020fe76cb..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391 100644
--- a/PythonicGcodeMachine/Gcode/__init__.py
+++ b/PythonicGcodeMachine/Gcode/__init__.py
@@ -1,384 +0,0 @@
-####################################################################################################
-#
-# PythonicGcodeMachine - @licence_header_description@
-# Copyright (C) 2018 Fabrice Salvaire
-#
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
-#
-####################################################################################################
-
-"""Module to implement the G-code language.
-
-History
--------
-
-The G-code language, also called RS-274, is a programming language for numerical control.  It was
-developed by the EIA in the early 1960s, and finally standardised by ISO in February 1980 as RS274D
-/ ISO 6983.
-
-The G-code language has several flavours and historical versions. A list of reference documents
-follows :
-
-* The NIST RS274NGC Interpreter - Version 3, T. Kramer, F. Proctor, E. Messina, National Institute
-  of Standards and Technology, NISTIR 6556, August 17, 2000
-* The documentation of the `Linux CNC <http://linuxcnc.org>`_ project, formerly Enhanced Machine
-  Controller developed at NIST,
-* EIA Standard RS-274-D Interchangeable Variable Block Data Format for Positioning, Contouring, and
-  Contouring/Positioning Numerically Controlled Machines, 2001 Eye Street, NW, Washington,
-  D.C. 20006: Electronic Industries Association, February 1979
-
-Overview
---------
-
-The RS274/NGC language is based on lines of code. Each line (also called a “block”) may include
-commands to a machining center to do several different things.
-
-A typical line of code consists of an optional line number at the beginning followed by one or more
-“words.” A word consists of a letter followed by a number (or something that evaluates to a
-number). A word may either give a command or provide an argument to a command. For example,
-:code:`G1 X3` is a valid line of code with two words. :code:`G1` is a command meaning “move in a
-straight line at the programmed feed rate,” and :code:`X3` provides an argument value (the value of
-X should be 3 at the end of the move). Most RS274/NGC commands start with either G or M (for
-miscellaneous). The words for these commands are called “G codes” and “M codes.”
-
-Language View of a Machining Center
------------------------------------
-
-Parameters
-~~~~~~~~~~
-
-In the RS274/NGC language view, a machining center maintains an array of 5400 numerical
-parameters. Many of them have specific uses. The parameter array should persist over time, even if
-the machining center is powered down.
-
-Coordinate Systems
-~~~~~~~~~~~~~~~~~~
-
-In the RS274/NGC language view, a machining center has an absolute coordinate system and nine
-program coordinate systems.
-
-You can set the offsets of the nine program coordinate systems using G10 L2 Pn (n is the number of
-the coordinate system) with values for the axes in terms of the absolute coordinate system.
-
-You can select one of the nine systems by using G54, G55, G56, G57, G58, G59, G59.1, G59.2, or
-G59.3. It is not possible to select the absolute coordinate system directly. You can offset the
-current coordinate system using G92 or G92.3. This offset will then apply to all nine program
-coordinate systems. This offset may be cancelled with G92.1 or G92.2.
-
-You can make straight moves in the absolute machine coordinate system by using G53 with either G0 or
-G1.
-
-Data for coordinate systems is stored in parameters.
-
-During initialization, the coordinate system is selected that is specified by parameter 5220. A
-value of 1 means the first coordinate system (the one G54 activates), a value of 2 means the second
-coordinate system (the one G55 activates), and so on. It is an error for the value of parameter 5220
-to be anything but a whole number between one and nine.
-
-Format of a Line
-----------------
-
-A permissible line of input RS274/NGC code consists of the following, in order, with the restriction
-that there is a maximum (currently 256) to the number of characters allowed on a line.
-
-#. an optional block delete character, which is a slash :code:`/` .
-#. an optional line number.
-#. any number of words, parameter settings, and comments.
-#. an end of line marker (carriage return or line feed or both).
-
-Spaces and tabs are allowed anywhere on a line of code and do not change the meaning of the line,
-except inside comments. This makes some strange-looking input legal. The line :code:`g0x +0. 12 34y
-7` is equivalent to :code:`g0 x+0.1234 y7`, for example.
-
-Blank lines are allowed in the input. They are to be ignored.
-
-Input is case insensitive, except in comments, i.e., any letter outside a comment may be in upper or
-lower case without changing the meaning of a line.
-
-Line Number
-~~~~~~~~~~~
-
-A line number is the letter :code:`N` followed by an integer (with no sign) between 0 and 99999
-written with no more than five digits (000009 is not OK, for example). Line numbers may be repeated
-or used out of order, although normal practice is to avoid such usage. Line numbers may also be
-skipped, and that is normal practice. A line number is not required to be used, but must be in the
-proper place if used.
-
-Word
-~~~~
-
-A word is a letter other than :code:`N` followed by a real value.
-
-Words may begin with any of the letters shown in the following table. The table includes :code:`N`
-for completeness, even though, as defined above, line numbers are not words. Several letters
-(:code:`I`, :code:`J, K`, :code:`L`, :code:`P`, :code:`R`) may have different meanings in different
-contexts.
-
-Table. Linux CNC Words and their meanings Letter
-
-====== =====================================================
-Letter 	Meaning
-====== =====================================================
-A       A axis of machine
-B       B axis of machine
-C       C axis of machine
-D       Tool radius compensation number
-F       Feed rate
-G       General function (See table Modal Groups)
-H       Tool length offset index
-I       X offset for arcs and G87 canned cycles
-J       Y offset for arcs and G87 canned cycles
-K       Z offset for arcs and G87 canned cycles.
-        Spindle-Motion Ratio for G33 synchronized movements.
-L       Generic parameter word for G10, M66 and others
-M       Miscellaneous function (See table Modal Groups)
-N       Line number
-P       Dwell time in canned cycles and with G4.
-        Key used with G10.
-Q       Feed increment in G73, G83 canned cycles
-R       Arc radius or canned cycle plane
-S       Spindle speed
-T       Tool selection
-U       U axis of machine
-V       V axis of machine
-W       W axis of machine
-X       X axis of machine
-Y       Y axis of machine
-Z       Z axis of machine
-====== =====================================================
-
-A real value is some collection of characters that can be processed to come up with a number. A real
-value may be an explicit number (such as 341 or -0.8807), a parameter value, an expression, or a
-unary operation value.
-
-Number
-~~~~~
-
-The following rules are used for (explicit) numbers. In these rules a digit is a single character
-between 0 and 9.
-
-* A number consists of (1) an optional plus or minus sign, followed by (2) zero to many digits,
-  followed, possibly, by (3) one decimal point, followed by (4) zero to many digits — provided that
-  there is at least one digit somewhere in the number.
-* There are two kinds of numbers: integers and decimals. An integer does not have a decimal point in
-  it; a decimal does.
-* Numbers may have any number of digits, subject to the limitation on line length.
-* A non-zero number with no sign as the first character is assumed to be positive.  Notice that
-  initial (before the decimal point and the first non-zero digit) and trailing (after the decimal
-  point and the last non-zero digit) zeros are allowed but not required. A number written with
-  initial or trailing zeros will have the same value when it is read as if the extra zeros were not
-  there.
-
-Parameter Value
-~~~~~~~~~~~~~~~
-
-A parameter value is the pound character :code:`#` followed by a real value. The real value must
-evaluate to an integer between 1 and 5399. The integer is a parameter number, and the value of the
-parameter value is whatever number is stored in the numbered parameter.
-
-The :code:`#` character takes precedence over other operations, so that, for example, :code:`#1+2`
-means the number found by adding 2 to the value of parameter 1, not the value found in parameter
-3. Of course, :code:`#[1+2]` does mean the value found in parameter 3. The :code:`#` character may
-be repeated; for example :code:`##2` means the value of the parameter whose index is the (integer)
-value of parameter 2.
-
-Expressions and Binary Operations
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-An expression is a set of characters starting with a left bracket :code:`[` and ending with a
-balancing right bracket :code:`]`. In between the brackets are numbers, parameter values,
-mathematical operations, and other expressions. An expression may be evaluated to produce a
-number. The expressions on a line are evaluated when the line is read, before anything on the line
-is executed. An example of an expression is :code:`[ 1 + acos[0] - [#3 ** [4.0/2]]]`.
-
-Binary operations appear only inside expressions. Nine binary operations are defined. There are four
-basic mathematical operations: addition :code:`+`, subtraction :code:`-`, multiplication :code:`*`,
-and division :code:`/`. There are three logical operations: non-exclusive or :code:`OR`, exclusive
-or :code:`XOR`, and logical and :code:`AND`. The eighth operation is the modulus operation
-:code:`MOD`. The ninth operation is the “power” operation :code:`**` of raising the number on the
-left of the operation to the power on the right.  The binary operations are divided into three
-groups. The first group is: power. The second group is: multiplication, division, and modulus. The
-third group is: addition, subtraction, logical non- exclusive or, logical exclusive or, and logical
-and. If operations are strung together (for example in the expression :code:`[2.0 / 3 * 1.5 - 5.5 /
-11.0]`), operations in the first group are to be performed before operations in the second group and
-operations in the second group before operations in the third group. If an expression contains more
-than one operation from the same group (such as the first / and * in the example), the operation on
-the left is performed first. Thus, the example is equivalent to: :code:`[((2.0 / 3) * 1.5) - (5.5 /
-11.0)]`, which simplifies to :code:`[1.0 - 0.5]`, which is 0.5.
-
-The logical operations and modulus are to be performed on any real numbers, not just on integers.
-The number zero is equivalent to logical false, and any non-zero number is equivalent to logical
-true.
-
-Unary Operation Value
-~~~~~~~~~~~~~~~~~~~~~
-
-A unary operation value is either :code:`ATAN` followed by one expression divided by another
-expression (for example :code:`ATAN[2]/[1+3]`) or any other unary operation name followed by an
-expression (for example :code:`SIN[90]`). The unary operations are: :code:`ABS` (absolute value),
-:code:`ACOS` (arc cosine), :code:`ASIN` (arc sine), :code:`ATAN` (arc tangent), :code:`COS`
-(cosine), :code:`EXP` (e raised to the given power), :code:`FIX` (round down), :code:`FUP` (round
-up), :code:`LN` (natural logarithm), :code:`ROUND` (round to the nearest whole number), :code:`SIN`
-(sine), :code:`SQRT` (square root), and :code:`TAN` (tangent). Arguments to unary operations which
-take angle measures (:code:`COS`, :code:`SIN`, and :code:`TAN`) are in degrees. Values returned by
-unary operations which return angle measures (:code:`ACOS`, :code:`ASIN`, and :code:`ATAN`) are also
-in degrees.
-
-The :code:`FIX` operation rounds towards the left (less positive or more negative) on a number line,
-so that :code:`FIX[2.8] = 2` and :code:`FIX[-2.8] = -3`, for example. The :code:`FUP` operation
-rounds towards the right (more positive or less negative) on a number line; :code:`FUP[2.8] = 3` and
-:code:`FUP[-2.8] = -2`, for example.
-
-Parameter Setting
-~~~~~~~~~~~~~~~~~
-
-A parameter setting is the following four items one after the other: (1) a pound character
-:code:`#`, (2) a real value which evaluates to an integer between 1 and 5399, (3) an equal sign
-:code:`=`, and (4) a real value. For example :code:`#3 = 15` is a parameter setting meaning “set
-parameter 3 to 15.”
-
-A parameter setting does not take effect until after all parameter values on the same line have
-been found. For example, if parameter 3 has been previously set to 15 and the line :code:`#3=6 G1
-x#3` is interpreted, a straight move to a point where x equals 15 will occur and the value of
-parameter 3 will be 6.
-
-Comments and Messages
-~~~~~~~~~~~~~~~~~~~~~
-
-Printable characters and white space inside parentheses is a comment. A left parenthesis always
-starts a comment. The comment ends at the first right parenthesis found thereafter. Once a left
-parenthesis is placed on a line, a matching right parenthesis must appear before the end of the
-line.  Comments may not be nested; it is an error if a left parenthesis is found after the start of
-a comment and before the end of the comment. Here is an example of a line containing a comment:
-:code:`G80 M5 (stop motion)`. Comments do not cause a machining center to do anything.
-
-.. A comment contains a message if “MSG,” appears after the left parenthesis and before any other
-  printing characters. Variants of “MSG,” which include white space and lower case characters are
-  allowed. The rest of the characters before the right parenthesis are considered to be a message.
-  Messages should be displayed on the message display device. Comments not containing messages need
-  not be displayed there.
-
-Item Repeats
-~~~~~~~~~~~~
-
-A line may have any number of :code:`G` words, but two :code:`G` words from the same modal group may
-not appear on the same line.
-
-A line may have zero to four :code:`M` words. Two :code:`M` words from the same modal group may not
-appear on the same line.
-
-For all other legal letters, a line may have only one word beginning with that letter.
-
-If a parameter setting of the same parameter is repeated on a line, :code:`#3=15 #3=6`, for example,
-only the last setting will take effect. It is silly, but not illegal, to set the same parameter
-twice on the same line.
-
-If more than one comment appears on a line, only the last one will be used; each of the other
-comments will be read and its format will be checked, but it will be ignored thereafter. It is
-expected that putting more than one comment on a line will be very rare.
-
-Item order
-~~~~~~~~~~
-
-The three types of item whose order may vary on a line (as given at the beginning of this section)
-are word, parameter setting, and comment. Imagine that these three types of item are divided into
-three groups by type.
-
-The first group (the words) may be reordered in any way without changing the meaning of the line.
-
-If the second group (the parameter settings) is reordered, there will be no change in the meaning of
-the line unless the same parameter is set more than once. In this case, only the last setting of the
-parameter will take effect. For example, after the line :code:`#3=15 #3=6` has been interpreted, the
-value of parameter 3 will be 6. If the order is reversed to :code:`#3=6 #3=15` and the line is
-interpreted, the value of parameter 3 will be 15.
-
-If the third group (the comments) contains more than one comment and is reordered, only the last
-comment will be used.
-
-If each group is kept in order or reordered without changing the meaning of the line, then the three
-groups may be interleaved in any way without changing the meaning of the line. For example, the line
-:code:`g40 g1 #3=15 (foo) #4=-7.0` has five items and means exactly the same thing in any of the 120
-possible orders (such as :code:`#4=-7.0 g1 #3=15 g40 (foo)`) for the five items.
-
-Commands and Machine Modes
-~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-In RS274/NGC, many commands cause a machining center to change from one mode to another, and the
-mode stays active until some other command changes it implicitly or explicitly. Such commands are
-called “modal”. For example, if coolant is turned on, it stays on until it is explicitly turned
-off. The :code:`G` codes for motion are also modal. If a :code:`G1` (straight move) command is given
-on one line, for example, it will be executed again on the next line if one or more axis words is
-available on the line, unless an explicit command is given on that next line using the axis words or
-cancelling motion.
-
-“Non-modal” codes have effect only on the lines on which they occur. For example, :code:`G4` (dwell)
-is non-modal.
-
-Modal Groups
-------------
-
-Modal commands are arranged in sets called “modal groups”, and only one member of a modal group may
-be in force at any given time. In general, a modal group contains commands for which it is logically
-impossible for two members to be in effect at the same time — like measure in inches vs. measure in
-millimeters. A machining center may be in many modes at the same time, with one mode from each modal
-group being in effect.
-
-.. The modal groups are shown in Table 4.
-
-For several modal groups, when a machining center is ready to accept commands, one member of the
-group must be in effect. There are default settings for these modal groups. When the machining
-center is turned on or otherwise re-initialized, the default values are automatically in effect.
-
-Group 1, the first group on the table, is a group of :code:`G` codes for motion. One of these is
-always in effect. That one is called the current motion mode.
-
-It is an error to put a G-code from group 1 and a G-code from group 0 on the same line if both of
-them use axis words. If an axis word-using G-code from group 1 is implicitly in effect on a line (by
-having been activated on an earlier line), and a group 0 G-code that uses axis words appears on the
-line, the activity of the group 1 G-code is suspended for that line. The axis word-using G-codes
-from group 0 are :code:`G10`, :code:`G28`, :code:`G30`, and :code:`G92`.
-
-G and Input Codes
------------------
-
-See ...
-
-..
-  G codes of the RS274/NGC language are shown in Table 5 and described following that.
-
-  In the command prototypes, three dots (...) stand for a real value. As described earlier, a real
-  value may be (1) an explicit number, 4, for example, (2) an expression, :code:`[2+2]`, for example,
-  (3) a parameter value, #88, for example, or (4) a unary function value, :code:`acos[0]`, for
-  example.  In most cases, if axis words (any or all of X..., Y..., Z..., A..., B..., C...) are given,
-  they specify a destination point. Axis numbers are in the currently active coordinate system, unless
-  explicitly described as being in the absolute coordinate system. Where axis words are optional, any
-  omitted axes will have their current value. Any items in the command prototypes not explicitly
-  described as optional are required. It is an error if a required item is omitted.
-
-  In the prototypes, the values following letters are often given as explicit numbers. Unless stated
-  otherwise, the explicit numbers can be real values. For example, :code:`G10 L2` could equally well
-  be written :code:`G[2*5] L[1+1]`. If the value of parameter 100 were 2, :code:`G10 L#100` would also
-  mean the same. Using real values which are not explicit numbers as just shown in the examples is
-  rarely useful.
-
-  If L... is written in a prototype the “...” will often be referred to as the “L number”. Similarly the
-  “...” in H... may be called the “H number”, and so on for any other letter.
-
-Order of Execution
-------------------
-
-The order of execution of items on a line is critical to safe and effective machine operation. Items
-are executed in a particular order if they occur on the same line.
-
-"""