+// Loads an std::vector<T> of size num_elements from a file.
+template<typename T>
+static void LoadStructVector(FILE *src_file, size_t num_elems, std::vector<T>& dest)
+{
+ size_t structsread = 0;
+ dest.resize(num_elems);
+ structsread = fread(dest.data(), sizeof(T), num_elems, src_file);
+ if (structsread != num_elems)
+ Fatal("Only read %u structs (expected %u)!", structsread, num_elems);
+}
+
+// Saves an std::vector<T> to a file. Size must be saves separately.
+template<typename T>
+static void SaveStructVector(FILE *dst_file, std::vector<T>& src)
+{
+ size_t written = 0;
+ written = fwrite(src.data(), sizeof(T), src.size(), dst_file);
+ if (written != src.size())
+ Fatal("Only wrote %u structs (expected %u)!", written, src.size());
+}
+
+static void WriteChunkHeader(FILE *dst_file, DocChunkTypes type, uint32_t size)
+{
+ size_t written = 0;
+ written = fwrite(&type, sizeof(type), 1, dst_file);
+ if (written != 1)
+ Fatal("Could not write Chunk header! (ID)");
+ written = fwrite(&size, sizeof(size), 1, dst_file);
+ if (written != 1)
+ Fatal("Could not write Chunk header (size)!");
+}
+
+static bool ReadChunkHeader(FILE *src_file, DocChunkTypes& type, uint32_t& size)
+{
+ if (fread(&type, sizeof(DocChunkTypes), 1, src_file) != 1)
+ return false;
+ if (fread(&size, sizeof(uint32_t), 1, src_file) != 1)
+ return false;
+ return true;
+}
+
+void Document::Save(const string & filename)
+{
+ Debug("Saving document to file \"%s\"...", filename.c_str());
+ FILE * file = fopen(filename.c_str(), "w");
+ if (file == NULL)
+ Fatal("Couldn't open file \"%s\" - %s", filename.c_str(), strerror(errno));
+
+ size_t written;
+ Debug("Number of objects (%u)...", ObjectCount());
+ WriteChunkHeader(file, CT_NUMOBJS, sizeof(m_count));
+ written = fwrite(&m_count, sizeof(m_count), 1, file);
+ if (written != 1)
+ Fatal("Failed to write number of objects!");
+
+ Debug("Object types...");
+ WriteChunkHeader(file, CT_OBJTYPES, m_objects.types.size() * sizeof(ObjectType));
+ SaveStructVector<ObjectType>(file, m_objects.types);
+
+ Debug("Object bounds...");
+ WriteChunkHeader(file, CT_OBJBOUNDS, m_objects.bounds.size() * sizeof(Rect));
+ SaveStructVector<Rect>(file, m_objects.bounds);
+
+ int err = fclose(file);
+ if (err != 0)
+ Fatal("Failed to close file \"%s\" - %s", filename.c_str(), strerror(err));
+
+ Debug("Successfully saved %u objects to \"%s\"", ObjectCount(), filename.c_str());
+}
+