static DrillGCode ParseGCode(GerberLineReader lineReader, GerberImage image)
{
DrillFileStats stats = image.DrillStats;
DrillGCode result = DrillGCode.Unknown;
int length = 0;
int value = lineReader.GetIntegerValue(ref length);
if (length == 2)
{
switch (value)
{
case 0:
stats.G00++;
result = DrillGCode.Rout;
break;
case 1:
stats.G01++;
result = DrillGCode.LinearMove;
break;
case 2:
stats.G02++;
result = DrillGCode.ClockwiseMove;
break;
case 3:
stats.G03++;
result = DrillGCode.CounterClockwiseMove;
break;
case 5:
image.DrillStats.G05++;
result = DrillGCode.Drill;
break;
case 90:
stats.G90++;
result = DrillGCode.Absolute;
break;
case 91:
stats.G91++;
result = DrillGCode.Incrementle;
break;
case 93:
stats.G93++;
result = DrillGCode.ZeroSet;
break;
default:
stats.GUnknown++;
break;
}
}
return(result);
}
static bool ParseDrillSegment(string drillFileName, GerberLineReader lineReader, GerberImage image, DrillState drillState)
{
bool foundEOF = false;
DrillFileStats stats = image.DrillStats;
GerberNet currentNet = image.GerberNetList[0];
currentNet.Level = image.LevelList[0];
currentNet.NetState = image.NetStateList[0];
bool done = false;
string line;
string[] command;
string errorMessage;
char nextCharacter;
while (!lineReader.EndOfFile && !foundEOF)
{
nextCharacter = lineReader.Read();
switch (nextCharacter)
{
case ';': // Comment.
line = lineReader.ReadLineToEnd();
break;
case 'D':
lineReader.Position--;
line = lineReader.ReadLineToEnd();
if (line.Substring(0, 6) == "DETECT")
{
stats.Detect = line.Substring(6, (line.Length - 7));
}
else
{
errorMessage = String.Format(CultureInfo.CurrentCulture, "Undefined header line: {0}.\n", line);
stats.AddNewError(-1, errorMessage, GerberErrorType.GerberNote, lineReader.LineNumber, drillFileName);
}
break;
case 'F':
lineReader.Position--;
line = lineReader.ReadLineToEnd();
if (line != "FMAT,2")
{
errorMessage = String.Format(CultureInfo.CurrentCulture, "Undefined header line: {0}.\n", line);
stats.AddNewError(-1, errorMessage, GerberErrorType.GerberNote, lineReader.LineNumber, drillFileName);
}
break;
case 'G':
DrillGCode gCode = ParseGCode(lineReader, image);
switch (gCode)
{
case DrillGCode.Rout:
errorMessage = "Rout Mode not supported.\n";
stats.AddNewError(-1, errorMessage, GerberErrorType.GerberNote, lineReader.LineNumber, drillFileName);
break;
case DrillGCode.Drill:
break;
case DrillGCode.Slot:
nextCharacter = lineReader.Read();
ParseCoordinate(lineReader, nextCharacter, image, drillState);
currentNet.StopX = drillState.CurrentX;
currentNet.StopY = drillState.CurrentY;
if (drillState.Unit == GerberUnit.Millimeter)
{
currentNet.StopX /= 25.4;
currentNet.StopY /= 25.4;
}
currentNet.ApertureState = GerberApertureState.On;
break;
case DrillGCode.Absolute:
drillState.CoordinateMode = DrillCoordinateMode.Absolute;
break;
case DrillGCode.Incrementle:
drillState.CoordinateMode = DrillCoordinateMode.Incremental;
break;
case DrillGCode.ZeroSet:
nextCharacter = lineReader.Read();
ParseCoordinate(lineReader, nextCharacter, image, drillState);
drillState.OriginX = drillState.CurrentX;
drillState.OriginY = drillState.CurrentY;
break;
default:
line = lineReader.ReadLineToEnd();
break;
}
break;
case 'I': // Inch header.
if (drillState.CurrentSection != DrillFileSection.Header)
{
break;
}
nextCharacter = lineReader.Read();
switch (nextCharacter)
{
// Inch
case 'N':
lineReader.Position -= 2;
line = lineReader.ReadLineToEnd();
command = line.Split(',');
if (command[0] == "INCH")
{
drillState.Unit = GerberUnit.Inch;
}
if (command.Length == 2)
{
if (command[1] == "TZ")
{
if (drillState.AutoDetect)
{
image.Format.OmitZeros = GerberOmitZero.OmitZerosLeading;
drillState.HeaderNumberFormat = DrillNumberFormat.Format_00_0000;
drillState.DecimalPlaces = 4;
}
}
else if (command[1] == "LZ")
{
image.Format.OmitZeros = GerberOmitZero.OmitZerosTrailing;
drillState.HeaderNumberFormat = DrillNumberFormat.Format_00_0000;
drillState.DecimalPlaces = 4;
}
else
{
errorMessage = "Invalid zero suppression found after INCH.\n";
stats.AddNewError(-1, errorMessage, GerberErrorType.GerberWarning, lineReader.LineNumber, drillFileName);
}
}
else
{
// No TZ/LZ specified, use defaults.
if (drillState.AutoDetect)
{
image.Format.OmitZeros = GerberOmitZero.OmitZerosLeading;
drillState.HeaderNumberFormat = DrillNumberFormat.Format_00_0000;
drillState.DecimalPlaces = 4;
}
}
break;
case 'C':
lineReader.Position -= 2;
line = lineReader.ReadLineToEnd();
command = line.Split(',');
if (command.Length == 2)
{
if (command[1] == "ON")
{
drillState.CoordinateMode = DrillCoordinateMode.Incremental;
}
else if (command[1] == "OFF")
{
drillState.CoordinateMode = DrillCoordinateMode.Absolute;
}
else
{
errorMessage = "Invalid coordinate data found.\n";
stats.AddNewError(-1, errorMessage, GerberErrorType.GerberWarning, lineReader.LineNumber, drillFileName);
}
}
else
{
errorMessage = "Invalid data found.\n";
stats.AddNewError(-1, errorMessage, GerberErrorType.GerberWarning, lineReader.LineNumber, drillFileName);
}
break;
}
break;
case 'M': // M code or Metric
nextCharacter = lineReader.Read();
if (!Char.IsDigit(nextCharacter)) // Not a M## command.
{
// Should be a metric command in header.
// METRIC is only acceptable within the header section.
// The syntax is METRIC[,{TZ|LZ}][,{000.000|000.00|0000.00}] ??????
if (drillState.CurrentSection != DrillFileSection.Header)
{
break;
}
done = true;
lineReader.Position -= 2; // Point back to the start on the line.
line = lineReader.ReadLineToEnd();
command = line.Split(',');
if (command[0] == "METRIC")
{
drillState.Unit = GerberUnit.Millimeter;
}
if (command.Length > 1)
{
if (command[1] == "TZ")
{
if (drillState.AutoDetect)
{
image.Format.OmitZeros = GerberOmitZero.OmitZerosLeading;
}
done = false;
}
else if (command[1] == "LZ")
{
if (drillState.AutoDetect)
{
image.Format.OmitZeros = GerberOmitZero.OmitZerosTrailing;
}
done = false;
}
else
{
errorMessage = "Invalid zero suppression found after METRIC.\n";
stats.AddNewError(-1, errorMessage, GerberErrorType.GerberWarning, lineReader.LineNumber, drillFileName);
done = true;
}
// Number format may or may not be specified.
if (!done && command.Length == 3)
{
if (drillState.AutoDetect)
{
drillState.HeaderNumberFormat = drillState.DataNumberFormat = DrillNumberFormat.Format_000_000;
drillState.DecimalPlaces = 3;
}
if (command[2] == "0000.00")
{
drillState.DataNumberFormat = DrillNumberFormat.Format_0000_00;
drillState.DecimalPlaces = 2;
}
else if (command[2] == "000.000")
{
drillState.DataNumberFormat = DrillNumberFormat.Format_000_000;
drillState.DecimalPlaces = 3;
}
else if (command[2] == "000.00")
{
drillState.DataNumberFormat = DrillNumberFormat.Format_000_00;
drillState.DecimalPlaces = 2;
}
else
{
errorMessage = "Invalid number format found after TZ/LZ.\n";
stats.AddNewError(-1, errorMessage, GerberErrorType.GerberWarning, lineReader.LineNumber, drillFileName);
}
}
}
else
{
// No TZ/LZ or number format specified, use defaults.
if (drillState.AutoDetect)
{
image.Format.OmitZeros = GerberOmitZero.OmitZerosLeading;
drillState.HeaderNumberFormat = DrillNumberFormat.Format_000_000;
drillState.DecimalPlaces = 3;
}
}
}
else if (Char.IsDigit(nextCharacter))
{
// Must be an M## code.
lineReader.Position--;
DrillMCode mCode = ParseMCode(lineReader, drillState, image);
switch (mCode)
{
case DrillMCode.Header:
drillState.CurrentSection = DrillFileSection.Header;
break;
case DrillMCode.EndHeader:
drillState.CurrentSection = DrillFileSection.Data;
break;
case DrillMCode.Metric:
if (drillState.Unit == GerberUnit.Unspecified && drillState.CurrentSection != DrillFileSection.Header)
{
errorMessage = "M71 code found with no METRIC specification in header.\n";
stats.AddNewError(-1, errorMessage, GerberErrorType.GerberError, lineReader.LineNumber, drillFileName);
errorMessage = "Assuming all tool sizes are in millimeters.\n";
stats.AddNewError(-1, errorMessage, GerberErrorType.GerberWarning);
for (int toolNumber = ToolMin; toolNumber < ToolMax; toolNumber++)
{
if (image.ApertureArray[toolNumber] != null)
{
double toolSize = image.ApertureArray[toolNumber].Parameters[0];
stats.ModifyDrillList(toolNumber, toolSize, "MM");
image.ApertureArray[toolNumber].Parameters[0] /= 25.4;
}
}
}
if (drillState.AutoDetect)
{
drillState.DataNumberFormat = drillState.BackupNumberFormat;
drillState.Unit = GerberUnit.Millimeter;
}
break;
case DrillMCode.Imperial:
if (drillState.AutoDetect)
{
if (drillState.DataNumberFormat != DrillNumberFormat.Format_00_0000)
{
drillState.BackupNumberFormat = drillState.DataNumberFormat; // Save format definition for later.
}
drillState.DataNumberFormat = DrillNumberFormat.Format_00_0000;
drillState.DecimalPlaces = 4;
drillState.Unit = GerberUnit.Inch;
}
break;
case DrillMCode.LongMessage:
case DrillMCode.Message:
case DrillMCode.CannedText:
line = lineReader.ReadLineToEnd();
// message here.
break;
case DrillMCode.NotImplemented:
case DrillMCode.EndPattern:
case DrillMCode.TipCheck:
break;
case DrillMCode.End:
line = lineReader.ReadLineToEnd();
break;
case DrillMCode.EndRewind: // EOF.
//done = true;
foundEOF = true;
break;
default:
stats.AddNewError(-1, "Undefined M code.", GerberErrorType.GerberError, lineReader.LineNumber, drillFileName);
break;
}
}
break;
case 'R':
if (drillState.CurrentSection == DrillFileSection.Header)
{
stats.AddNewError(-1, "R code not allowed in the header.", GerberErrorType.GerberError, lineReader.LineNumber, drillFileName);
}
else
{
double stepX = 0.0, stepY = 0.0;
int length = 0;
image.DrillStats.R++;
double startX = drillState.CurrentX;
double startY = drillState.CurrentY;
int repeatcount = lineReader.GetIntegerValue(ref length);
nextCharacter = lineReader.Read();
if (nextCharacter == 'X')
{
stepX = GetDoubleValue(lineReader, drillState.DataNumberFormat, image.Format.OmitZeros, drillState.DecimalPlaces);
nextCharacter = lineReader.Read();
}
if (nextCharacter == 'Y')
{
stepY = GetDoubleValue(lineReader, drillState.DataNumberFormat, image.Format.OmitZeros, drillState.DecimalPlaces);
}
else
{
lineReader.Position--;
}
for (int i = 1; i < repeatcount; i++)
{
drillState.CurrentX = startX + i * stepX;
drillState.CurrentY = startY + i * stepY;
currentNet = AddDrillHole(image, drillState, currentNet);
}
}
break;
case 'S':
// Ignore spindle speed.
lineReader.ReadLineToEnd();
break;
case 'T':
int tool = ParseTCode(lineReader, drillFileName, drillState, image);
break;
case 'X':
case 'Y':
// Hole coordinate found. Do some parsing.
ParseCoordinate(lineReader, nextCharacter, image, drillState);
// Add the new drill hole.
currentNet = AddDrillHole(image, drillState, currentNet);
break;
case '%':
drillState.CurrentSection = DrillFileSection.Data;
break;
// Ignore white space or null characters.
case '\n':
case '\r':
case ' ':
case '\t':
case '\0':
break;
}
}
return(foundEOF);
}
