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Netduino-gcode/gcodeparser/Parser/GcodeParser.cs at master · dsuarezv/Netduino-gcode · GitHub
dsuarezv
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GcodeParser.cs
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Netduino-gcode
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gcodeparser
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Parser
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GcodeParser.cs
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using
System
;
using
System
.
Text
;
namespace
gcodeparser
{
public
enum
State
{
}
public
class
GCodeParser
{
#if
DESKTOP
private
static
System
.
Globalization
.
CultureInfo
USCulture
=
new
System
.
Globalization
.
CultureInfo
(
"en-US"
)
;
#endif
private
static
char
[
]
NumberBuffer
=
new
char
[
20
]
;
private
static
int
NumberBufferIndex
=
0
;
private
static
bool
DeletedLine
=
false
;
private
static
int
LineNumber
=
0
;
private
static
int
CurrentIndex
=
0
;
public
static
string
Line
;
public
static
int
ParserLineNumber
=
0
;
public
static
void
ParseLine
(
string
line
)
{
ParserLineNumber
++
;
Line
=
line
.
ToUpper
(
)
;
CurrentIndex
=
0
;
//Logger.Log("=== {0} ===", line);
ParseCommand
(
)
;
}
private
static
bool
SkipSpaces
(
)
{
while
(
CurrentIndex
<
Line
.
Length
)
{
char
c
=
Line
[
CurrentIndex
]
;
switch
(
c
)
{
// Skip spaces and tabs
case
' '
:
case
'
\t
'
:
CurrentIndex
++
;
break
;
default
:
return
true
;
}
}
return
false
;
}
internal
static
char
PeekChar
(
)
{
if
(
!
SkipSpaces
(
)
)
return
(
char
)
0
;
if
(
CurrentIndex
>=
Line
.
Length
)
return
(
char
)
0
;
return
Line
[
CurrentIndex
]
;
}
internal
static
char
ReadChar
(
)
{
if
(
!
SkipSpaces
(
)
)
return
(
char
)
0
;
if
(
CurrentIndex
>=
Line
.
Length
)
return
(
char
)
0
;
return
Line
[
CurrentIndex
++
]
;
}
internal
static
string
ReadNumber
(
)
{
NumberBufferIndex
=
0
;
bool
isFirst
=
true
;
while
(
true
)
{
char
c
=
PeekChar
(
)
;
switch
(
c
)
{
case
'('
:
SkipToEndComment
(
)
;
break
;
case
' '
:
case
'
\t
'
:
if
(
NumberBufferIndex
>
0
)
return
GetNumberString
(
)
;
break
;
case
';'
:
return
GetNumberString
(
)
;
case
'-'
:
if
(
isFirst
)
AddDigitToNumber
(
c
)
;
else
return
GetNumberString
(
)
;
break
;
case
'0'
:
case
'1'
:
case
'2'
:
case
'3'
:
case
'4'
:
case
'5'
:
case
'6'
:
case
'7'
:
case
'8'
:
case
'9'
:
case
'.'
:
AddDigitToNumber
(
c
)
;
break
;
case
'
\0
'
:
default
:
return
GetNumberString
(
)
;
}
isFirst
=
false
;
}
}
private
static
void
SkipToEndComment
(
)
{
while
(
true
)
{
char
c
=
ReadChar
(
)
;
if
(
c
==
')'
)
break
;
}
}
private
static
void
AddDigitToNumber
(
char
d
)
{
ReadChar
(
)
;
NumberBuffer
[
NumberBufferIndex
]
=
d
;
NumberBufferIndex
++
;
}
private
static
string
GetNumberString
(
)
{
if
(
NumberBufferIndex
>
0
)
{
return
new
string
(
NumberBuffer
,
0
,
NumberBufferIndex
)
;
}
else
{
return
null
;
}
}
internal
static
int
ParseInt
(
)
{
string
val
=
ReadNumber
(
)
;
if
(
val
==
null
)
{
Logger
.
Error
(
"ParseInt: no numbers at {0} in '{1}'. Skipped."
,
CurrentIndex
,
Line
)
;
return
-
1
;
}
try
{
return
int
.
Parse
(
val
)
;
}
catch
(
Exception
ex
)
{
Logger
.
Error
(
"ParseInt ERROR parsing '{0}': {1}"
,
val
,
ex
)
;
return
-
1
;
}
}
internal
static
double
ParseDouble
(
)
{
string
val
=
ReadNumber
(
)
;
if
(
val
==
null
)
{
Logger
.
Error
(
"ParseDouble: no numbers at {0} in '{1}'. Skipped."
,
CurrentIndex
,
Line
)
;
return
double
.
MinValue
;
}
try
{
return
Math2
.
StringToDouble
(
val
)
;
}
catch
(
Exception
ex
)
{
Logger
.
Error
(
"ParseDouble ERROR parsing '{0}': {1}"
,
val
,
ex
)
;
return
double
.
MinValue
;
}
}
private
static
bool
ParseComment
(
)
{
while
(
true
)
{
char
c
=
ReadChar
(
)
;
switch
(
c
)
{
case
'
\0
'
:
return
false
;
case
')'
:
return
true
;
}
}
}
private
static
bool
ParseDashComment
(
)
{
int
numDashes
=
1
;
while
(
true
)
{
char
c
=
ReadChar
(
)
;
switch
(
c
)
{
case
'
\0
'
:
return
false
;
case
'-'
:
numDashes
++
;
break
;
default
:
if
(
numDashes
<
3
)
{
Logger
.
Error
(
"ERROR: Parse --- comment: not enough '-' to interpret as comment. Returning control to parser, but it's an unsuported combination."
)
;
return
true
;
}
return
false
;
// otherwise, the rest of the line is a comment, no need to continue.
}
}
}
private
static
void
ParseCommand
(
)
{
while
(
true
)
{
char
c
=
ReadChar
(
)
;
switch
(
c
)
{
case
'
\0
'
:
return
;
// EOL
case
';'
:
return
;
// comment line
case
'('
:
// Begin comment
if
(
!
ParseComment
(
)
)
return
;
break
;
case
'-'
:
// comment --- (not parsed by readnumber)
if
(
!
ParseDashComment
(
)
)
return
;
break
;
case
'/'
:
DeletedLine
=
true
;
break
;
case
'N'
:
LineNumber
=
ParseInt
(
)
;
break
;
case
'G'
:
ProcessCommand
(
new
CommandG
(
)
)
;
break
;
case
'T'
:
ProcessCommand
(
new
CommandT
(
)
)
;
break
;
case
'F'
:
ProcessCommand
(
new
CommandF
(
)
)
;
break
;
case
'M'
:
ProcessCommand
(
new
CommandM
(
)
)
;
break
;
case
'S'
:
ProcessCommand
(
new
CommandS
(
)
)
;
break
;
case
'D'
:
ProcessCommand
(
new
CommandD
(
)
)
;
break
;
case
'X'
:
// Primary axes
case
'Y'
:
case
'Z'
:
case
'I'
:
case
'J'
:
case
'K'
:
case
'R'
:
ProcessCommand
(
new
CommandAxis
(
c
)
)
;
break
;
default
:
Logger
.
Log
(
"ParseCommand: Unknown state at {0}: '{1}'"
,
CurrentIndex
,
c
)
;
ReadChar
(
)
;
break
;
}
}
}
private
static
void
ProcessCommand
(
BaseCommand
cmd
)
{
cmd
.
Deleted
=
DeletedLine
;
cmd
.
LineNumber
=
LineNumber
;
cmd
.
Parse
(
)
;
}
}
}
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