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| 1 // Copyright 2013 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #ifndef CHROME_BROWSER_PROFILE_RESETTER_JTL_INTERPRETER_H_ | |
| 6 #define CHROME_BROWSER_PROFILE_RESETTER_JTL_INTERPRETER_H_ | |
| 7 | |
| 8 #include <string> | |
| 9 | |
| 10 #include "base/basictypes.h" | |
| 11 #include "base/values.h" | |
| 12 | |
| 13 // Executes a JTL program on a given dictionary. | |
| 14 // | |
| 15 // JTL (Json Traversal Language) programs are defined in jtl_foundation.h | |
| 16 class JtlInterpreter { | |
| 17 public: | |
| 18 enum Result { | |
| 19 OK, | |
| 20 PARSE_ERROR, | |
| 21 RUNTIME_ERROR, | |
| 22 RESULT_MAX, | |
| 23 }; | |
| 24 | |
| 25 // |hasher_seed| is a value used in jtl_foundation::Hasher. All node names, | |
| 26 // strings, integers and doubles are hashed before being compared to hash | |
| 27 // values listed in |program|. | |
| 28 // |program| is a byte array containing a JTL program. | |
| 29 // |input| is a dictionary on which the program is evaluated. | |
| 30 JtlInterpreter(const std::string& hasher_seed, | |
| 31 const std::string& program, | |
| 32 const base::DictionaryValue* input); | |
| 33 ~JtlInterpreter(); | |
| 34 | |
| 35 void Execute(); | |
| 36 | |
| 37 Result result() const { return result_; } | |
| 38 const base::DictionaryValue* working_memory() const { | |
| 39 return working_memory_.get(); | |
| 40 } | |
| 41 bool GetOutputBoolean(const std::string& unhashed_key, bool* output) const; | |
| 42 bool GetOutputString(const std::string& unhashed_key, | |
| 43 std::string* output) const; | |
| 44 | |
| 45 // Generates a checksum of the loaded program, defined as the first 3 bytes of | |
| 46 // the program's SHA-256 hash interpreted as a big-endian integer. | |
| 47 int CalculateProgramChecksum() const; | |
| 48 | |
| 49 private: | |
| 50 // Input. | |
| 51 std::string hasher_seed_; | |
| 52 std::string program_; | |
| 53 const base::DictionaryValue* input_; | |
| 54 // Output. | |
| 55 scoped_ptr<base::DictionaryValue> working_memory_; | |
| 56 Result result_; | |
| 57 | |
| 58 DISALLOW_COPY_AND_ASSIGN(JtlInterpreter); | |
| 59 }; | |
| 60 | |
| 61 #endif // CHROME_BROWSER_PROFILE_RESETTER_JTL_INTERPRETER_H_ | |
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