Integrating Online Wallet into Chrome.

base/string_number_conversions.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef BASE_STRING_NUMBER_CONVERSIONS_H_
 #define BASE_STRING_NUMBER_CONVERSIONS_H_
 
 #include <string>
 #include <vector>
 
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 // Returns a hex string representation of a binary buffer. The returned hex
 // string will be in upper case. This function does not check if |size| is
 // within reasonable limits since it's written with trusted data in mind.  If
 // you suspect that the data you want to format might be large, the absolute
 // max size for |size| should be is
 //   std::numeric_limits<size_t>::max() / 2
 BASE_EXPORT std::string HexEncode(const void* bytes, size_t size);
 
 // Best effort conversion, see StringToInt above for restrictions.
+// Will only successful parse hex values that will fit into |output|, i.e.
+// -0x80000000 < |input| < 0x7FFFFFFF.
 BASE_EXPORT bool HexStringToInt(const StringPiece& input, int* output);
 
+// Best effort conversion, see StringToInt above for restrictions.
+// Will only successful parse hex values that will fit into |output|, i.e.
+// -0x8000000000000000 < |input| < 0x7FFFFFFFFFFFFFFF.
+BASE_EXPORT bool HexStringToInt64(const StringPiece& input, int64* output);
+
 // Similar to the previous functions, except that output is a vector of bytes.
 // |*output| will contain as many bytes as were successfully parsed prior to the
 // error.  There is no overflow, but input.size() must be evenly divisible by 2.
 // Leading 0x or +/- are not allowed.
 BASE_EXPORT bool HexStringToBytes(const std::string& input,
                                   std::vector<uint8>* output);
 
 }  // namespace base
 
 #endif  // BASE_STRING_NUMBER_CONVERSIONS_H_