#usage "<nobr><b>Import an EAGLE-Net-List into a schematic</b>\n"
       "<p>"
       "Usage:<br>"
       "RUN cmd-net-list2sch [<i>netlist-file</i> ] <br>"
       "RUN cmd-net-list2sch [<i>net part pin part pin</i> ] <br>"
       "RUN cmd-net-list2sch : Opens a file dialog to select the Net list file."
       "<p>"
       "Example:<br>"
       "RUN cmd-net-list2sch hexapod.lst<br>"
       "RUN cmd-net-list2sch IN1 R1 1 C1 2<br>"
       "RUN cmd-net-list2sch clk ic1 9 ic3 15<br>"
       "<p>"
       "<b>Attention:</b>"
       "In special situations it could happen that importing a netlist into a schematic "
       "(in form of 'airwires' as it happens here) results in misconnections.<br>"
       "This is the case if a net line overlaps a pin connection point.<br>"
       "If this certain pin under the net should get connected later, EAGLE will connect to the net "
       "instead of the pin under it.<br>"
       "We want to avoid this problem in the ULP by drawing the net "
       "line from the first pin with an offset of 50 mil. This way "
       "diagonal net lines will be drawn <br>"
       "and there will be hardly pins that lie under net lines.<br>"
       "If a net has to be drawn on a further sheet of the schematic "
       "EAGLE uses the diagonal offset of 50 mil and places an "
       "additional LABEL."
       "<p></nobr>"
       "<author>Author: support@cadsoft.de</author>"

// THIS PROGRAM IS PROVIDED AS IS AND WITHOUT WARRANTY OF ANY KIND, EXPRESSED OR IMPLIED

string Hilfe = "<p><b>ACHTUNG:</b><br>\n"
       "Das Einlesen einer Netzliste (Airwire) in den Schaltplan, " +
       "kann in besonderen Situationen zu falschen Verbindungen f&uuml;hren.<br>" +
       "Werden die Netze als <i>Luftlinien</i> zwischen den Bauteilpins gezeichnet, " +
       "so kann es vorkommen, dass eine Netzlinie Bauteilpins &uuml;berlagert.<br>" +
       "Wird sp&auml;ter <b>dieser</b> Pin unter der Linie an ein Netz angeschlossen " +
       "so nimmt EAGLE das Netz als Kontaktpunkt und nicht den darunterliegenden Pin.<br>" +
       "In diesem ULP wird versucht diese Problematik zu umgehen, in dem vom " +
       "ersten Pin mit einem Offset (50mil) diagonal vom Pin weg, " +
       "und dann direkt zum zweiten Pin gezeichnet wird.<br>" +
       "Dadurch entstehen diagonale Luftlinien die nur in seltenen F&auml;llen einen Pin " +
       "&uuml;berlagern.<br>" +
       "Wird ein Netz auf einer anderen Schaltplanseite weitergef&uuml;hrt, " +
       "so wird vom Pin um 50 Mil diagonal weggezeichnet und zus&auml;tzlich " +
       "ein <b>LABEL</b> plaziert.</nobr>";

if (argc < 2) dlgMessageBox(usage + Hilfe, "OK");

string Version = "1.0.1"; // 2009-12-15 command RUN path/filename option with apostroph while space in path/filename
                          //            check first if part place bevor run script. alf@cadsoft.de

// Eagle NET-Command definition
string net_name = strupr(argv[1]);
string part_a = strupr(argv[2]);
string pin_a    = strupr(argv[3]);
string part_b = strupr(argv[4]);
string pin_b    = strupr(argv[5]);

string cmd = "";

string lines[];
int    nLines;
//string s;

// *** Eagle NET LIST definition ***
string tok_Net = "Net";
string tok_Part = "Part";
string tok_Pad = "Pad";
string netlistLines[];
string signalName;
int    signalCnt = 0;
string NetListfileName;

int    cntP = 0;
string Parts[];


// *** functions ***
int actSheet(UL_SHEET S) {
  return S.number;
}


int partplaced(string partname) {        // 2009-12-15
  for (int n = 0; n < cntP; n++) {
    if (Parts[n] == partname) return 1;
  }
  return 0;
}


void readNetList(void) {
  int sn = 0;

  for (sn = 0; sn < nLines; sn++)   {  // search for start line "Net  Part  Pin" in Eagle Netlist
    if( (strstr(lines[sn], tok_Net) == 0) && (strstr(lines[sn], tok_Part) >= 8) && (strstr(lines[sn], tok_Pad) >= 16) )     {
      sn++;
      break;
    }
  }
  if (sn == nLines) {
    dlgMessageBox(NetListfileName + " is not a Eagle-Netlist", "OK");
    exit (0);
  }

  string netName;
  string par;
  string pin;
  string par_b;
  string pin_b;

  do {
    signalCnt = strsplit (netlistLines, lines[sn], ' ');

    if (signalCnt > 1) {
      // init NET command
      int ncnt = 1;
      if (netlistLines[0]) {
        netName = netlistLines[0];
        do {
          if (netlistLines[ncnt]) {
            par = netlistLines[ncnt];
            ncnt++;
            break;
          }
          ncnt++;
        } while (ncnt <= signalCnt);
        do         {
          if (netlistLines[ncnt] ) {
            pin = netlistLines[ncnt];
            ncnt++;
          }
          ncnt++;
        } while (ncnt <= signalCnt);
      }

      else {
        do {
          if (netlistLines[ncnt]) {
            par_b = netlistLines[ncnt];
            ncnt++;
            break;
          }
          ncnt++;
        } while (ncnt <= signalCnt);
        do {
          if (netlistLines[ncnt] ) {
            pin_b = netlistLines[ncnt];
          }
          ncnt++;
        } while (ncnt <= signalCnt);
        if (partplaced(par)) {       // 2009-12-15 alf@cadsoft.de
          cmd += "RUN '" + argv[0] + "' " + netName + " " + par + " " + pin + " ";
          cmd += par_b + " " + pin_b + ";\n";
          par = par_b;
          pin = pin_b;
          par_b = "";
          pin_b = "";
        }
        else {
          dlgMessageBox("! Part "+ par +" not foud.","OK");
          exit(-2);
        }
      }
    }
    sn++;
  } while (sn <= nLines);
  return;
}

// *** MAIN ***
if (schematic) {
  // run as net command
  if (part_b && pin_b) {
    int pinA_sheet = 0;
    int pinB_sheet = 0;
    int xA, yA, xB, yB;
    string g = ";\nGRID LAST;\n";
    int actualsheet;
    if (sheet) sheet(SH) actualsheet = SH.number;

    // *** Schematic coord. ***
    schematic(S) {
      cmd = "SET WIRE_BEND 2;\nGRID MIL 50 2 ;\n";
      S.sheets(SH) {
        SH.parts(PA) {
          if (PA.name == part_a ) {
            PA.instances(IN) {
              IN.gate.symbol.pins(P) { // Pin
                if (P.contact) {
                  string cp = P.contact.name;        // PAD name von Connect/Pad
                  if (cp == pin_a) {
                    xA = P.x;
                    yA = P.y;
                    pinA_sheet = SH.number;
                  }
                }
              }
            }
          }
          if (part_b) {
            if (PA.name == part_b ) {
              PA.instances(IN) {
                IN.gate.symbol.pins(P) { // Pin
                  if (P.contact) {
                    string cp = P.contact.name;        // PAD name von Connect/Pad
                    if (cp == pin_b) {
                      xB = P.x;
                      yB = P.y;
                      pinB_sheet = SH.number;
                    }
                  }
                }
              }
            }
          }
        }
      }
    }
    if (net_name) net_name = "'" + net_name + "'"; // place Name in ' ' for NET-Command
    string s;
    if ( (pinA_sheet != 0) && (pinB_sheet != 0) ) {
      if (pinA_sheet == pinB_sheet) {
        if (actualsheet != pinA_sheet) {
          sprintf(s, "EDIT .s%d;\n", pinA_sheet);
          cmd += s;
        }
        sprintf(s, "NET %s (%.3f %.3f)", net_name, u2mil(xA), u2mil(yA) );
        cmd += s;
        sprintf(s, " (%.3f %.3f)", u2mil(xA)+50, u2mil(yA)-50 );
        cmd += s;
        sprintf(s, " (%.3f %.3f);\n", u2mil(xB), u2mil(yB) );
        cmd += s;
        exit (cmd + g);
      }
      else {
        if (actualsheet != pinA_sheet) {
          sprintf(s, "EDIT .s%d;\n", pinA_sheet);
          cmd += s;
        }
        sprintf(s, "NET %s (%.3f %.3f)", net_name, u2mil(xA), u2mil(yA) );
        cmd += s;
        sprintf(s, " (%.3f %.3f);\n", u2mil(xA)+50, u2mil(yA)+50 );
        cmd += s;
        sprintf(s, "LABEL (%.3f %.3f)", u2mil(xA), u2mil(yA) );
        cmd += s;
        sprintf(s, " (%.3f %.3f);\n", u2mil(xA)+50, u2mil(yA)+50 );
        cmd += s;
        sprintf(s, "CHANGE LAYER 91 (%.3f %.3f);\n", u2mil(xA)+50, u2mil(yA)+50 );
        cmd += s;

        if (actualsheet != pinB_sheet) {
          sprintf(s, "EDIT .s%d;\n", pinB_sheet);
          cmd += s;
        }
        sprintf(s, "NET %s (%.3f %.3f)", net_name, u2mil(xB), u2mil(yB) );
        cmd += s;
        sprintf(s, " (%.3f %.3f);\n", u2mil(xB)+50, u2mil(yB)+50 );
        cmd += s;
        sprintf(s, "LABEL (%.3f %.3f)", u2mil(xB), u2mil(yB) );
        cmd += s;
        sprintf(s, " (%.3f %.3f);\n", u2mil(xB)+50, u2mil(yB)+50 );
        cmd += s;
        sprintf(s, "CHANGE LAYER 91 (%.3f %.3f);\n", u2mil(xB)+50, u2mil(yB)+50 );
        cmd += s;
        exit (cmd + g);
      }
    }
    else {
      cmd = "";
      if (pinA_sheet == 0) cmd += "part " + part_a + " Pin " + pin_a + "\n";
      if (pinB_sheet == 0) cmd += "part " + part_b + " Pin " + pin_b + "\n";
      cmd += "not fond!";
      dlgMessageBox(cmd, "OK");
      exit (-1);
    }
  }

  // run as script converter
  else {
    schematic(S) {
      S.parts(P) {
        Parts[cntP] = P.name;
        cntP++;
      }
    }
    int n = 0;
    string text;
    int nBytes;

    if (argv[1]) NetListfileName = argv[1];
    else NetListfileName = dlgFileOpen("Select Script File", "*.*", "*.*");

    if (NetListfileName) {
       nLines = fileread(lines, NetListfileName);
       readNetList();
    }
    output(NetListfileName + "x", "wtD") printf("%s", cmd);  // D == temporary file
    exit (cmd);
  }
}

else {
  dlgMessageBox("Start this ULP from a schematic!", "OK");
  exit (0);
}