* cython/*_imc_termite.*: introduce both print_channel/print_channels

methods featuring csv delimiter option
* imc_raw.hpp: add print_channel()
* python/{example.py,usage.py}: adjust to existing sample file names,
  add print_channel() example
* src/main.cpp: add --delimiter option, additional CLI option checks

cython/imc_termite.pxd

@@ -14,6 +14,7 @@ cdef extern from "imc_raw.hpp" namespace "imc":
     void set_file(string rawfile) except +
     # get JSON list of channels
     vector[string] get_channels(bool json, bool data) except +
-    # print all channels
+    # print single channel/all channels
-    void print_channels(string outputdir) except +
+    void print_channel(string channeluuid, string outputdir, char delimiter) except +
+    void print_channels(string outputdir, char delimiter) except +
     void print_table(string outputfile) except +

cython/py_imc_termite.pyx

@@ -25,9 +25,11 @@ cdef class imctermite:
     chnlstjn = [jn.loads(chn.decode(errors="ignore")) for chn in chnlst]
     return chnlstjn
 
-  # print channels
+  # print single channel/all channels
-  def print_channels(self, string outputdir):
+  def print_channel(self, string channeluuid, string outputfile, char delimiter):
-    self.cpp_imc.print_channels(outputdir)
+    self.cpp_imc.print_channel(channeluuid,outputfile,delimiter)
+  def print_channels(self, string outputdir, char delimiter):
+    self.cpp_imc.print_channels(outputdir,delimiter)
 
   # print table including channels
   def print_table(self, string outputfile):

lib/imc_raw.hpp

@@ -332,14 +332,38 @@ namespace imc
       return channels;
     }
 
-    // print all channels in directory
+    // print single specific channel
+    void print_channel(std::string channeluuid, std::string outputfile, const char sep)
+    {
+      // check for given parent directory of output file
+      std::filesystem::path pdf = outputfile;
+      if ( !std::filesystem::is_directory(pdf.parent_path()) )
+      {
+        throw std::runtime_error(std::string("required directory does not exist: ")
+                                 + pdf.parent_path().u8string() );
+      }
+
+      // find channel with given name
+      if ( channels_.count(channeluuid) == 1 )
+      {
+        channels_.at(channeluuid).print(outputfile,sep);
+      }
+      else
+      {
+        throw std::runtime_error(std::string("channel does not exist:")
+                                 + channeluuid);
+      }
+    }
+
+    // print all channels into given directory
     void print_channels(std::string output, const char sep)
     {
       // check for given directory
       std::filesystem::path pd = output;
       if ( !std::filesystem::is_directory(pd) )
       {
-        throw std::runtime_error("given directory does not exist");
+        throw std::runtime_error(std::string("given directory does not exist: ")
+                                 + output);
       }
 
       for ( std::map<std::string,imc::channel>::iterator it = channels_.begin();

python/example.py

@@ -7,16 +7,16 @@ import pyarrow as pa
 import pyarrow.parquet as pq
 from pathlib import Path
 
-fileobj1 = Path("smp/Rangerover_Evoque_F-RR534_2019-05-07/").rglob("*.raw")
+fileobj1 = Path("samples/datasetA/").rglob("*.raw")
 rawlist1 = [str(fl) for fl in fileobj1]
 
-fileobj2 = Path("smp/Mercedes_E-Klasse-2019-08-08/").rglob("*.raw")
+fileobj2 = Path("samples/datasetB/").rglob("*.raw")
 rawlist2 = [str(fl) for fl in fileobj2]
 
 rawlist = rawlist1 #[rawlist1[0],rawlist1[4],rawlist2[0],rawlist2[6]]
 for fil in rawlist2 :
     rawlist.append(fil)
-rawlist.append("smp/pressure_Vacuum.asc")
+rawlist.append("./README.md")
 
 print("")
 print(rawlist)

python/usage.py

@@ -1,10 +1,11 @@
 
 import imc_termite
 import json
+import os
 
 # declare and initialize instance of "imctermite" by passing a raw-file
 try :
-    imcraw = imc_termite.imctermite(b"samples/sampleA.raw")
+    imcraw = imc_termite.imctermite(b"samples/exampleB.raw")
 except RuntimeError as e :
     raise Exception("failed to load/parse raw-file: " + str(e))
 
@@ -22,7 +23,16 @@ print(len(chnydata))
 print(len(chnxdata))
 
 # print the channels into a specific directory
-imcraw.print_channels(b"./")
+imcraw.print_channels(b"./data",ord(','))
+
+# print all channels separately
+idx = 0
+for chn in channels :
+    print(str(idx)+" : "+chn['name']+" : "+chn['uuid'])
+    filname = os.path.join("./data",str(idx) + "_" + chn['name']+".csv")
+    print(filname)
+    imcraw.print_channel(chn['uuid'].encode(),filname.encode(),ord(','))
+    idx = idx + 1
 
 # print all channels in single file
-imcraw.print_table(b"./allchannels.csv")
+# imcraw.print_table(b"./data/allchannels.csv")

src/main.cpp

@@ -32,25 +32,37 @@ optkeys parse_args(int argc, char* argv[], bool list_args = false)
   // parse all CLI arguments
   for ( int i = 1; i < argc; i++ )
   {
-    if ( std::string(argv[i]) == std::string("--showmeta")
+    // if ( std::string(argv[i]) == std::string("--showmeta")
-      || std::string(argv[i]) == std::string("-m") )
+    //   || std::string(argv[i]) == std::string("-m") )
-    {
+    // {
-      prsdkeys.insert(std::pair<std::string,std::string>("showmeta",argv[i]));
+    //   prsdkeys.insert(std::pair<std::string,std::string>("showmeta",argv[i]));
-    }
+    // }
     // else if ( std::string(argv[i]) == std::string("--listgroups")
     //        || std::string(argv[i]) == std::string("-g") )
     // {
     //   prsdkeys.insert(std::pair<std::string,std::string>("listgroups",argv[i]));
     // }
-    else if ( std::string(argv[i]) == std::string("--listchannels")
+    if ( std::string(argv[i]) == std::string("--listchannels")
            || std::string(argv[i]) == std::string("-c") )
     {
       prsdkeys.insert(std::pair<std::string,std::string>("listchannels",argv[i]));
+      if ( i+1 < argc ) {
+        if ( argv[i+1][0] != '-' ) {
+          std::cerr<<"option --list-channels does not take any argument\n";
+          prsdkeys.insert(std::pair<std::string,std::string>("invalid","channels"));
+        }
+      }
     }
     else if ( std::string(argv[i]) == std::string("--listblocks")
            || std::string(argv[i]) == std::string("-b") )
     {
       prsdkeys.insert(std::pair<std::string,std::string>("listblocks",argv[i]));
+      if ( i+1 < argc ) {
+        if ( argv[i+1][0] != '-' ) {
+          std::cerr<<"option --list-blocks does not take any argument\n";
+          prsdkeys.insert(std::pair<std::string,std::string>("invalid","listblocks"));
+        }
+      }
     }
     else if ( std::string(argv[i]) == std::string("--output")
            || std::string(argv[i]) == std::string("-d") )
@@ -71,7 +83,7 @@ optkeys parse_args(int argc, char* argv[], bool list_args = false)
     {
       if ( i+1 == argc || argv[i+1][0] == '-' )
       {
-        std::cerr<<"invalid or missing --output argument\n";
+        std::cerr<<"invalid or missing --delimiter argument\n";
         prsdkeys.insert(std::pair<std::string,std::string>("invalid","delimiter"));
       }
       else
@@ -98,13 +110,13 @@ optkeys parse_args(int argc, char* argv[], bool list_args = false)
         std::cerr<<"invalid or unkown argument: "<<argv[i]<<"\n";
         prsdkeys.insert(std::pair<std::string,std::string>("invalid",argv[i]));
       }
-      // or missing filenames
+      // // or missing filenames
-      else if ( std::string(argv[i]).find(".raw") == std::string::npos )
+      // else if ( std::string(argv[i]).find(".raw") == std::string::npos )
-      {
+      // {
-        std::cerr<<"doesn't look like a .raw file (make sure to include extension in filename!): "
+      //   std::cerr<<"doesn't look like a .raw file (make sure to include extension in filename!): "
-                 <<argv[i]<<"\n";
+      //            <<argv[i]<<"\n";
-        prsdkeys.insert(std::pair<std::string,std::string>("invalid",argv[i]));
+      //   prsdkeys.insert(std::pair<std::string,std::string>("invalid",argv[i]));
-      }
+      // }
     }
   }
 
@@ -227,11 +239,22 @@ int main(int argc, char* argv[])
     if ( cfgopts.count("output") == 1 )
     {
       try {
+        // check and use desired delimiter
+        char delim;
+        if ( cfgopts.count("delimiter") == 1 )
+        {
           if ( cfgopts.at("delimiter").size() > 1 )
           {
             throw std::runtime_error("invalid delimiter comprised of more than a single char");
           }
-        imcraw.print_channels(cfgopts.at("output"),cfgopts.at("delimiter")[0]);
+          delim = cfgopts.at("delimiter")[0];
+        }
+        // use comma by default
+        else
+        {
+          delim = ',';
+        }
+        imcraw.print_channels(cfgopts.at("output"),delim);
       } catch (const std::exception& e) {
         std::cerr<<"failed to print channels for "<<rawfile<<": "<<e.what()<<"\n";
       }