Add argument --separator to roscontrol-sot-parse-log.

src/roscontrol-sot-parse-log.cc

 #include <fstream>
 #include <iostream>
 #include <iomanip>
+#include <cassert>
+#include <cstring>
+
+void usage (char* bin)
+{
+  std::cerr << "Usage: " << bin << " [--separator sep] binary_file_name\n";
+}
 
 int main (int argc, char* argv[])
 {
-  if (argc != 2) {
-    std::cerr << "Usage: " << argv[0] << " binary_file_name\n";
+  if (argc < 2) {
+    usage(argv[0]);
     return 1;
   }
+  int iarg = 1;
+  std::string sep (" ");
+  while (iarg + 1 < argc - 1) {
+    if (strcmp(argv[iarg], "--separator") == 0) {
+      sep = argv[iarg+1];
+      iarg += 2;
+    } else {
+      usage(argv[0]);
+      return 1;
+    }
+  }
+  assert (iarg == argc-1);
 
-  std::ifstream in (argv[1], std::ios::binary);
+  std::ifstream in (argv[iarg], std::ios::binary);
   if (!in.is_open() || !in.good()) {
-    std::cerr << "Couldn't open file " << argv[1] << '\n';
+    std::cerr << "Couldn't open file " << argv[iarg] << '\n';
     return 2;
   }
 
@@ -20,7 +39,7 @@ int main (int argc, char* argv[])
   in.read ((char*)&nVector   , sizeof(std::size_t));
   in.read ((char*)&vectorSize, sizeof(std::size_t));
   if (!in.good()) {
-    std::cerr << "Couldn't parse file: " << argv[1] << '\n';
+    std::cerr << "Couldn't parse file: " << argv[iarg] << '\n';
     return 3;
   }
 
@@ -33,10 +52,10 @@ int main (int argc, char* argv[])
       in.read ((char*)&v, sizeof(double));
       if (!in.good()) {
         std::cerr << "Stopped to parse at (" << i << ',' << j
-          << ") of file: " << argv[1] << '\n';
+          << ") of file: " << argv[iarg] << '\n';
         return 4;
       }
-      std::cout << v << ' ';
+      std::cout << v << sep;
     }
     std::cout << '\n';
   }