Fixed stl reader by porting it to std string. It had serious problems in utf8 environments

git-svn-id: http://www.openmesh.org/svnrepo/OpenMesh/trunk@583 fdac6126-5c0c-442c-9429-916003d36597

src/OpenMesh/Core/IO/reader/STLReader.cc

@@ -47,6 +47,7 @@
 #include <map>
 
 #include <float.h>
+#include <fstream>
 
 // OpenMesh
 #include <OpenMesh/Core/System/config.h>
@@ -182,6 +183,19 @@ private:
 
 //-----------------------------------------------------------------------------
 
+void trimStdString( std::string& _string) {
+  // Trim Both leading and trailing spaces
+
+  size_t start = _string.find_first_not_of(" \t\r\n");
+  size_t end   = _string.find_last_not_of(" \t\r\n");
+
+  if(( std::string::npos == start ) || ( std::string::npos == end))
+    _string = "";
+  else
+    _string = _string.substr( start, end-start+1 );
+}
+
+//-----------------------------------------------------------------------------
 
 bool
 _STLReader_::
@@ -189,7 +203,8 @@ read_stla(const std::string& _filename, BaseImporter& _bi) const
 {
   omlog() << "[STLReader] : read ascii file\n";
 
-  FILE*  in = fopen(_filename.c_str(), "r");
+  std::fstream in( _filename.c_str(), std::ios_base::in );
+
   if (!in)
   {
     omerr() << "[STLReader] : cannot not open file "
@@ -199,10 +214,9 @@ read_stla(const std::string& _filename, BaseImporter& _bi) const
   }
 
 
-
-  char                       line[100], *p;
   unsigned int               i;
   OpenMesh::Vec3f            v;
+  OpenMesh::Vec3f            n;
   unsigned int               cur_idx(0);
   BaseImporter::VHandles     vhandles;
 
@@ -210,20 +224,60 @@ read_stla(const std::string& _filename, BaseImporter& _bi) const
   std::map<Vec3f, VertexHandle, CmpVec>            vMap(comp);
   std::map<Vec3f, VertexHandle, CmpVec>::iterator  vMapIt;
 
+  std::string line;
 
-  while (in && !feof(in) && fgets(line, 100, in))
+  bool normal = false;
-  {
+
-    for (p=line; isspace(*p) && *p!='\0'; ++p) {}; // skip white-space
+  while( in && !in.eof() ) {
+
+    // Get one line
+    std::getline(in,line);
+    if ( in.bad() ){
+      omerr() << "  Warning! Could not read file properly!\n";
+      in.close();
+      return false;
+    }
+
+    // Trim Both leading and trailing spaces
+    trimStdString(line);
+
+    // Normal found?
+    if (line.find("facet normal") != std::string::npos) {
+      std::stringstream strstream(line);
+
+      std::string garbage;
+
+      // facet
+      strstream >> garbage;
+
+      // normal
+      strstream >> garbage;
+
+      strstream >> n[0];
+      strstream >> n[1];
+      strstream >> n[2];
+
+      normal = true;
+    }
+
+    // Detected a triangle
+    if ( (line.find("outer") != std::string::npos) ||  (line.find("OUTER") != std::string::npos ) ) {
 
-    if ((strncmp(p, "outer", 5) == 0) || (strncmp(p, "OUTER", 5) == 0))
-    {
       vhandles.clear();
 
-      for (i=0; i<3; ++i)
+      for (i=0; i<3; ++i) {
-      {
+        // Get one vertex
- 	fgets(line, 100, in);
+        std::getline(in,line);
-	for (p=line; isspace(*p) && *p!='\0'; ++p) {}; // skip white-space
+        trimStdString(line);
- 	sscanf(p+6, "%f %f %f", &v[0], &v[1], &v[2]);
+
+        std::stringstream strstream(line);
+
+        std::string garbage;
+        strstream >> garbage;
+
+        strstream >> v[0];
+        strstream >> v[1];
+        strstream >> v[2];
 
         // has vector been referenced before?
         if ((vMapIt=vMap.find(v)) == vMap.end())
@@ -236,18 +290,25 @@ read_stla(const std::string& _filename, BaseImporter& _bi) const
         else
           // Yes : get index from map
           vhandles.push_back(vMapIt->second);
+
       }
 
       // Add face only if it is not degenerated
       if ((vhandles[0] != vhandles[1]) &&
           (vhandles[0] != vhandles[2]) &&
-	  (vhandles[1] != vhandles[2]))
+          (vhandles[1] != vhandles[2])) {
-	_bi.add_face(vhandles);
+
+
+        FaceHandle fh = _bi.add_face(vhandles);
+
+      }
+
+      normal = false;
     }
   }
 
   if (in)
-    fclose(in);
+    in.close();
 
   return true;
 }