Show parsing time.

README.md

@@ -17,6 +17,12 @@ Tiny but powerful single file wavefront obj loader written in C++. No dependency
 
 `tinyobjloader` is good for embedding .obj loader to your (global illumination) renderer ;-)
 
+Notice!
+-------
+
+`master` branch will be replaced with `develop` branch in the near future: https://github.com/syoyo/tinyobjloader/tree/develop
+`develop` branch has more better support and clean API interface for loading .obj and also it has optimized multi-threaded parser(probably 10x faster than `master`). If you are new to use `TinyObjLoader`, I highly recommend to use `develop` branch.
+
 
 What's new
 ----------
@@ -61,6 +67,12 @@ TinyObjLoader is successfully used in ...
 * pbrt-v3 https://github.com/mmp/pbrt-v3
 * cocos2d-x https://github.com/cocos2d/cocos2d-x/
 * Android Vulkan demo https://github.com/SaschaWillems/Vulkan
+* voxelizer https://github.com/karimnaaji/voxelizer
+* Probulator https://github.com/kayru/Probulator
+* OptiX Prime baking https://github.com/nvpro-samples/optix_prime_baking
+* FireRays SDK https://github.com/GPUOpen-LibrariesAndSDKs/FireRays_SDK
+* parg, tiny C library of various graphics utilities and GL demos https://github.com/prideout/parg
+* Opengl unit of ChronoEngine https://github.com/projectchrono/chrono-opengl
 * Your project here!
 
 Features

test.cc

@@ -8,6 +8,90 @@
 #include <sstream>
 #include <fstream>
 
+#ifdef _WIN32
+#ifdef __cplusplus
+extern "C" {
+#endif
+#include <windows.h>
+#include <mmsystem.h>
+#ifdef __cplusplus
+}
+#endif
+#pragma comment(lib, "winmm.lib")
+#else
+#if defined(__unix__) || defined(__APPLE__)
+#include <sys/time.h>
+#else
+#include <ctime>
+#endif
+#endif
+
+// not thread-safe 
+class timerutil {
+public:
+#ifdef _WIN32
+  typedef DWORD time_t;
+
+  timerutil() { ::timeBeginPeriod(1); }
+  ~timerutil() { ::timeEndPeriod(1); }
+
+  void start() { t_[0] = ::timeGetTime(); }
+  void end() { t_[1] = ::timeGetTime(); }
+
+  time_t sec() { return (time_t)((t_[1] - t_[0]) / 1000); }
+  time_t msec() { return (time_t)((t_[1] - t_[0])); }
+  time_t usec() { return (time_t)((t_[1] - t_[0]) * 1000); }
+  time_t current() { return ::timeGetTime(); }
+
+#else
+#if defined(__unix__) || defined(__APPLE__)
+  typedef unsigned long int time_t;
+
+  void start() { gettimeofday(tv + 0, &tz); }
+  void end() { gettimeofday(tv + 1, &tz); }
+
+  time_t sec() { return (time_t)(tv[1].tv_sec - tv[0].tv_sec); }
+  time_t msec() {
+    return this->sec() * 1000 +
+           (time_t)((tv[1].tv_usec - tv[0].tv_usec) / 1000);
+  }
+  time_t usec() {
+    return this->sec() * 1000000 + (time_t)(tv[1].tv_usec - tv[0].tv_usec);
+  }
+  time_t current() {
+    struct timeval t;
+    gettimeofday(&t, NULL);
+    return (time_t)(t.tv_sec * 1000 + t.tv_usec);
+  }
+
+#else // C timer
+  // using namespace std;
+  typedef clock_t time_t;
+
+  void start() { t_[0] = clock(); }
+  void end() { t_[1] = clock(); }
+
+  time_t sec() { return (time_t)((t_[1] - t_[0]) / CLOCKS_PER_SEC); }
+  time_t msec() { return (time_t)((t_[1] - t_[0]) * 1000 / CLOCKS_PER_SEC); }
+  time_t usec() { return (time_t)((t_[1] - t_[0]) * 1000000 / CLOCKS_PER_SEC); }
+  time_t current() { return (time_t)clock(); }
+
+#endif
+#endif
+
+private:
+#ifdef _WIN32
+  DWORD t_[2];
+#else
+#if defined(__unix__) || defined(__APPLE__)
+  struct timeval tv[2];
+  struct timezone tz;
+#else
+  time_t t_[2];
+#endif
+#endif
+};
+
 static void PrintInfo(const std::vector<tinyobj::shape_t>& shapes, const std::vector<tinyobj::material_t>& materials, bool triangulate = true)
 {
   std::cout << "# of shapes    : " << shapes.size() << std::endl;
@@ -131,8 +215,11 @@ TestLoadObj(
   std::vector<tinyobj::shape_t> shapes;
   std::vector<tinyobj::material_t> materials;
 
+  timerutil t;
+  t.start();
   std::string err;
   bool ret = tinyobj::LoadObj(shapes, materials, err, filename, basepath, flags);
+  t.end();
 
   if (!err.empty()) {
     std::cerr << err << std::endl;
@@ -143,6 +230,8 @@ TestLoadObj(
     return false;
   }
 
+  printf("Parse time: %lu [msecs]\n", t.msec());
+
   bool triangulate( ( flags & tinyobj::triangulation ) == tinyobj::triangulation );
   PrintInfo(shapes, materials, triangulate );
 

tiny_obj_loader.h

@@ -267,6 +267,40 @@ struct obj_shape {
   std::vector<float> vt;
 };
 
+//See http://stackoverflow.com/questions/6089231/getting-std-ifstream-to-handle-lf-cr-and-crlf
+std::istream& safeGetline(std::istream& is, std::string& t)
+{
+    t.clear();
+
+    // The characters in the stream are read one-by-one using a std::streambuf.
+    // That is faster than reading them one-by-one using the std::istream.
+    // Code that uses streambuf this way must be guarded by a sentry object.
+    // The sentry object performs various tasks,
+    // such as thread synchronization and updating the stream state.
+
+    std::istream::sentry se(is, true);
+    std::streambuf* sb = is.rdbuf();
+
+    for(;;) {
+        int c = sb->sbumpc();
+        switch (c) {
+        case '\n':
+            return is;
+        case '\r':
+            if(sb->sgetc() == '\n')
+                sb->sbumpc();
+            return is;
+        case EOF:
+            // Also handle the case when the last line has no line ending
+            if(t.empty())
+                is.setstate(std::ios::eofbit);
+            return is;
+        default:
+            t += (char)c;
+        }
+    }
+}
+
 #define IS_SPACE( x ) ( ( (x) == ' ') || ( (x) == '\t') )
 #define IS_DIGIT( x ) ( (unsigned int)( (x) - '0' ) < (unsigned int)10 )
 #define IS_NEW_LINE( x ) ( ( (x) == '\r') || ( (x) == '\n') || ( (x) == '\0') )
@@ -682,12 +716,9 @@ void LoadMtl(std::map<std::string, int> &material_map,
   material_t material;
   InitMaterial(material);
 
-  size_t maxchars = 8192;          // Alloc enough size.
-  std::vector<char> buf(maxchars); // Alloc enough size.
   while (inStream.peek() != -1) {
-    inStream.getline(&buf[0], static_cast<std::streamsize>(maxchars));
+    std::string linebuf;
-
+    safeGetline(inStream, linebuf);
-    std::string linebuf(&buf[0]);
 
     // Trim newline '\r\n' or '\n'
     if (linebuf.size() > 0) {
@@ -972,12 +1003,9 @@ bool LoadObj(std::vector<shape_t> &shapes,       // [output]
 
   shape_t shape;
 
-  int maxchars = 8192;                                  // Alloc enough size.
-  std::vector<char> buf(static_cast<size_t>(maxchars)); // Alloc enough size.
   while (inStream.peek() != -1) {
-    inStream.getline(&buf[0], maxchars);
+    std::string linebuf;
-
+    safeGetline(inStream, linebuf);
-    std::string linebuf(&buf[0]);
 
     // Trim newline '\r\n' or '\n'
     if (linebuf.size() > 0) {