Add RawData request in preparation for manual loading of...

import/cross/raw_data.cc

Index: import/cross/raw_data.cc
===================================================================
--- import/cross/raw_data.cc	(revision 20922)
+++ import/cross/raw_data.cc	(working copy)
@@ -35,6 +35,9 @@
 
 #include "import/cross/raw_data.h"
 #include "base/file_util.h"
+#include "utils/cross/file_path_utils.h"
+#include "base/file_path.h"
+#include "base/file_util.h"
 
 #ifdef OS_MACOSX
 #include <CoreFoundation/CoreFoundation.h>
@@ -44,6 +47,10 @@
 #include <rpc.h>
 #endif
 
+using file_util::OpenFile;
+using file_util::CloseFile;
+using file_util::GetFileSize;
+
 namespace o3d {
 
 // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -74,13 +81,58 @@
   return RawData::Ref(new RawData(service_locator, uri, data, length));
 }
 
+// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+RawData::Ref RawData::CreateFromFile(ServiceLocator* service_locator,
+                                     const String &uri,
+                                     const String& filename) {
+  RawData::Ref data(Create(service_locator, uri, NULL, 0));
+  if (!data->SetFromFile(filename)) {
+    data.Reset();
+  }
 
+  return data;
+}
+
 // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 RawData::~RawData() {
   Discard();
 }
 
 // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+bool RawData::SetFromFile(const String& filename) {
+  FilePath filepath = UTF8ToFilePath(filename);
+  FILE *file = OpenFile(filepath, "rb");
+  bool result = false;
+  if (!file) {
+    DLOG(ERROR) << "file not found \"" << filename << "\"";
+  } else {
+    // Determine the file's length
+    int64 file_size64;
+    if (!GetFileSize(filepath, &file_size64)) {
+      DLOG(ERROR) << "error getting file size \"" << filename << "\"";
+    } else {
+      if (file_size64 > 0xffffffffLL) {
+        DLOG(ERROR) << "file is too large \"" << filename << "\"";
+      } else {
+        size_t file_length = static_cast<size_t>(file_size64);
+
+        // Load the file data into memory
+        data_.reset(new uint8[file_length]);
+        length_ = file_length;
+        if (fread(data_.get(), file_length, 1, file) != 1) {
+          DLOG(ERROR) << "error reading file \"" << filename << "\"";
+        } else {
+          result = true;
+        }
+      }
+    }
+    CloseFile(file);
+  }
+
+  return result;
+}
+
+// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 const uint8 *RawData::GetData() const {
   // Return data immediately if we have it
   if (data_.get()) {