Initial commit of the FlatBuffers code.

Change-Id: I4c9f0f722490b374257adb3fec63e44ae93da920
Tested: using VS2010 / Xcode / gcc on Linux.

include/flatbuffers/util.h

@@ -0,0 +1,99 @@
+/*
+ * Copyright 2014 Google Inc. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef FLATBUFFERS_UTIL_H_
+#define FLATBUFFERS_UTIL_H_
+
+#include <fstream>
+#include <iomanip>
+#include <string>
+#include <sstream>
+#include <stdlib.h>
+
+namespace flatbuffers {
+
+// Convert an integer or floating point value to a string.
+// In contrast to std::stringstream, "char" values are
+// converted to a string of digits.
+template<typename T> std::string NumToString(T t) {
+  // to_string() prints different numbers of digits for floats depending on
+  // platform and isn't available on Android, so we use stringstream
+  std::stringstream ss;
+  if (sizeof(T) > 1) ss << t;
+  else ss << static_cast<int>(t);  // Avoid char types used as character data.
+  return ss.str();
+}
+
+// Convert an integer value to a hexadecimal string.
+// The returned string length is the number of nibbles in
+// the supplied value prefixed by 0 digits.  For example,
+// IntToStringHex(static_cast<int>(0x23)) returns the
+// string "00000023".
+template<typename T> std::string IntToStringHex(T i) {
+  std::stringstream ss;
+  ss << std::setw(sizeof(T) * 2)
+     << std::setfill('0')
+     << std::hex
+     << std::uppercase
+     << i;
+  return ss.str();
+}
+
+// Portable implementation of strtoull().
+inline int64_t StringToInt(const char *str) {
+  #ifdef _MSC_VER
+    return _strtoui64(str, nullptr, 10);
+  #else
+    return strtoull(str, nullptr, 10);
+  #endif
+}
+
+// Load file "name" into "buf" returning true if successful
+// false otherwise.  If "binary" is false data is read
+// using ifstream's text mode, otherwise data is read with
+// no transcoding.
+inline bool LoadFile(const char *name, bool binary, std::string *buf) {
+  std::ifstream ifs(name, binary ? std::ifstream::binary : std::ifstream::in);
+  if (!ifs.is_open()) return false;
+  *buf = std::string(std::istreambuf_iterator<char>(ifs),
+                    std::istreambuf_iterator<char>());
+  return !ifs.bad();
+}
+
+// Save data "buf" of length "len" bytes into a file
+// "name" returning true if successful, false otherwise.
+// If "binary" is false data is written using ifstream's
+// text mode, otherwise data is written with no
+// transcoding.
+inline bool SaveFile(const char *name, const char *buf, size_t len,
+                     bool binary) {
+  std::ofstream ofs(name, binary ? std::ofstream::binary : std::ofstream::out);
+  if (!ofs.is_open()) return false;
+  ofs.write(buf, len);
+  return !ofs.bad();
+}
+
+// Save data "buf" into file "name" returning true if
+// successful, false otherwise.  If "binary" is false
+// data is written using ifstream's text mode, otherwise
+// data is written with no transcoding.
+inline bool SaveFile(const char *name, const std::string &buf, bool binary) {
+  return SaveFile(name, buf.c_str(), buf.size(), binary);
+}
+
+}  // namespace flatbuffers
+
+#endif  // FLATBUFFERS_UTIL_H_