Fixes gcc-4.2.1+libstdc++ compatibility (closes #25)

bob/io/image/cpp/image.cpp

@@ -7,57 +7,59 @@
  * Copyright (c) 2016, Regents of the University of Colorado on behalf of the University of Colorado Colorado Springs.
  */
 
+#include <stdint.h>
+#include <boost/assign/list_of.hpp>
 #include <bob.io.image/image.h>
 
 namespace bob { namespace io { namespace image {
 
-static std::map<std::string, std::vector<std::vector<std::uint8_t>>> _initialize_magic_numbers(){
+static std::map<std::string, std::vector<std::vector<uint8_t>>> _initialize_magic_numbers(){
   // these numbers are based on: http://stackoverflow.com/questions/26350342/determining-the-extension-type-of-an-image-file-using-binary/26350431#26350431
-  std::map<std::string, std::vector<std::vector<std::uint8_t>>> magic_numbers;
+  std::map<std::string, std::vector<std::vector<uint8_t>>> magic_numbers;
   // BMP
-  magic_numbers[".bmp"].push_back({ 0x42, 0x4D });
+  magic_numbers[".bmp"].push_back(boost::assign::list_of(0x42)(0x4D));
   // NetPBM, see https://en.wikipedia.org/wiki/Netpbm_format
-  magic_numbers[".pbm"].push_back({ 0x50, 0x31 });// P1
-  magic_numbers[".pbm"].push_back({ 0x50, 0x34 });// P4
-  magic_numbers[".pgm"].push_back({ 0x50, 0x32 });// P2
-  magic_numbers[".pgm"].push_back({ 0x50, 0x35 });// P5
-  magic_numbers[".ppm"].push_back({ 0x50, 0x33 });// P3
-  magic_numbers[".ppm"].push_back({ 0x50, 0x36 });// P6
+  magic_numbers[".pbm"].push_back(boost::assign::list_of(0x50)(0x31));// P1
+  magic_numbers[".pbm"].push_back(boost::assign::list_of(0x50)(0x34));// P4
+  magic_numbers[".pgm"].push_back(boost::assign::list_of(0x50)(0x32));// P2
+  magic_numbers[".pgm"].push_back(boost::assign::list_of(0x50)(0x35));// P5
+  magic_numbers[".ppm"].push_back(boost::assign::list_of(0x50)(0x33));// P3
+  magic_numbers[".ppm"].push_back(boost::assign::list_of(0x50)(0x36));// P6
   // TODO: what about P7?
 
 #ifdef HAVE_GIFLIB
   // GIF
-  magic_numbers[".gif"].push_back({ 0x47, 0x49, 0x46, 0x38, 0x37, 0x61 });
-  magic_numbers[".gif"].push_back({ 0x47, 0x49, 0x46, 0x38, 0x39, 0x61 });
+  magic_numbers[".gif"].push_back(boost::assign::list_of(0x47)(0x49)(0x46)(0x38)(0x37)(0x61));
+  magic_numbers[".gif"].push_back(boost::assign::list_of(0x47)(0x49)(0x46)(0x38)(0x39)(0x61));
 #endif // HAVE_GIFLIB
 #ifdef HAVE_LIBPNG
   // PNG
-  magic_numbers[".png"].push_back({ 0x89, 0x50, 0x4E, 0x47, 0x0D, 0x0A, 0x1A, 0x0A });
+  magic_numbers[".png"].push_back(boost::assign::list_of(0x89)(0x50)(0x4E)(0x47)(0x0D)(0x0A)(0x1A)(0x0A));
 #endif // HAVE_LIB_PNG
 #ifdef HAVE_LIBJPEG
   // JPEG
-  magic_numbers[".jpg"].push_back({ 0xFF, 0xD8, 0xFF });
-  magic_numbers[".jpg"].push_back({ 0x00, 0x00, 0x00, 0x0C, 0x6A, 0x50, 0x20, 0x20 });
+  magic_numbers[".jpg"].push_back(boost::assign::list_of(0xFF)(0xD8)(0xFF));
+  magic_numbers[".jpg"].push_back(boost::assign::list_of(0x00)(0x00)(0x00)(0x0C)(0x6A)(0x50)(0x20)(0x20));
 #endif // HAVE_LIBJPEG
 #ifdef HAVE_LIBTIFF
   // TIFF
-  magic_numbers[".tiff"].push_back({ 0x0C, 0xED });
-  magic_numbers[".tiff"].push_back({ 0x49, 0x20, 0x49 });
-  magic_numbers[".tiff"].push_back({ 0x49, 0x49, 0x2A, 0x00 });
-  magic_numbers[".tiff"].push_back({ 0x4D, 0x4D, 0x00, 0x2A });
-  magic_numbers[".tiff"].push_back({ 0x4D, 0x4D, 0x00, 0x2B });
+  magic_numbers[".tiff"].push_back(boost::assign::list_of(0x0C)(0xED));
+  magic_numbers[".tiff"].push_back(boost::assign::list_of(0x49)(0x20)(0x49));
+  magic_numbers[".tiff"].push_back(boost::assign::list_of(0x49)(0x49)(0x2A)(0x00));
+  magic_numbers[".tiff"].push_back(boost::assign::list_of(0x4D)(0x4D)(0x00)(0x2A));
+  magic_numbers[".tiff"].push_back(boost::assign::list_of(0x4D)(0x4D)(0x00)(0x2B));
 #endif // HAVE_LIBTIFF
   return magic_numbers;
 }
 
 // global static thread-safe map of known magic numbers
-static std::map<std::string, std::vector<std::vector<std::uint8_t>>> known_magic_numbers = _initialize_magic_numbers();
+static std::map<std::string, std::vector<std::vector<uint8_t>>> known_magic_numbers = _initialize_magic_numbers();
 
 
 const std::string& get_correct_image_extension(const std::string& image_name){
   // read first 8 bytes from file
   uint8_t image_bytes[8];
-  std::ifstream f(image_name);
+  std::ifstream f(image_name.c_str());
   if (!f) throw std::runtime_error("The given image '" + image_name + "' could not be opened for reading");
   f.read(reinterpret_cast<char*>(image_bytes), 8);