add WFObj::getLine()

WFObj.cc

@@ -123,11 +123,10 @@ bool WFObj::load(const char *fname)
 
 bool WFObj::load(const WFObj::Buffer &buff)
 {
-    string buildup;
-    while (istr.good())
+    for (size_t idx = 0; idx < buff.size;)
     {
-        istr.getline(buf, size+1);
-        string input = trimString(buf);
+        string line = getLine(buff, idx, &idx)
+        string input = trimString(line);
         int sz = input.size();
         if (sz == 0 || input[0] == '#')
             continue;
@@ -145,6 +144,30 @@ bool WFObj::load(const WFObj::Buffer &buff)
     return true;
 }
 
+string WFObj::getLine(const Buff & buff, size_t idx, size_t *update_idx)
+{
+    size_t len = 0;
+    while (idx + len < buff.length)
+    {
+        uint8_t ch = buff.data[idx + len];
+        if (ch == 0)
+        {
+            *update_idx = idx + len + 1;
+            break;
+        }
+        if (ch == '\r' || ch == '\n')
+        {
+            *update_idx = idx + len + 1;
+            uint8_t nextch = buff.data[*update_idx];
+            if (ch == '\r' && nextch == '\n')
+                (*update_idx)++;
+            break;
+        }
+        len++;
+    }
+    return string((const char *) &buff.data[idx], len);
+}
+
 void WFObj::processInputLine(const std::string & input)
 {
     string line = input;

WFObj.h

@@ -77,6 +77,7 @@ protected:
     void parseVertexIndices(const std::string & vtxref, int * ret);
     void updateAABB(const float * const vertex);
     static Buffer loadfile(const char *path);
+    std::string getLine(const Buff & buff, size_t idx, size_t *update_idx);
 
     /* variables */
     std::vector< std::vector<std::string> > m_data;