| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | #include "script.h" | ||
| 2 | #include "tokens.h" | ||
| 3 | #include <cstring> | ||
| 4 | |||
| 5 | namespace script | ||
| 6 | { | ||
| 7 | 4 | std::string runtime(const std::vector<char>& bytecode, | |
| 8 | std::function<void(const char* msg)> print) | ||
| 9 | { | ||
| 10 |
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4 | if (bytecode.empty()) |
| 11 |
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1 | return "Empty source"; |
| 12 | |||
| 13 | 3 | const auto size = bytecode.size(); | |
| 14 | |||
| 15 |
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3 | if (size < 5) |
| 16 | ✗ | return "Invalid code (1)"; | |
| 17 | |||
| 18 | // check ID | ||
| 19 |
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3 | if (bytecode.at(0) != 't') |
| 20 | ✗ | return "Invalid code (2)"; | |
| 21 |
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3 | if (bytecode.at(1) != 'c') |
| 22 | ✗ | return "Invalid code (2)"; | |
| 23 |
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3 | if (bytecode.at(2) != 'b') |
| 24 | ✗ | return "Invalid code (2)"; | |
| 25 |
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3 | if (bytecode.at(3) != 'c') |
| 26 | ✗ | return "Invalid code (2)"; | |
| 27 | |||
| 28 | // check version | ||
| 29 |
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3 | if (bytecode.at(4) != 1) |
| 30 | ✗ | return "Invalid version"; | |
| 31 | |||
| 32 | // validate | ||
| 33 | |||
| 34 | 3 | const auto payload_offset = 5 + sizeof(size_t); | |
| 35 | |||
| 36 | { | ||
| 37 | 3 | size_t stored_hash = 0; | |
| 38 | 3 | memcpy(&stored_hash, bytecode.data() + 5, sizeof(size_t)); | |
| 39 | |||
| 40 | 3 | std::vector<char> hash_argument; | |
| 41 | |||
| 42 | std::vector<char>::const_iterator start = | ||
| 43 | 3 | bytecode.begin() + payload_offset; | |
| 44 | 3 | std::vector<char>::const_iterator end = bytecode.end(); | |
| 45 | |||
| 46 |
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3 | hash_argument.insert(hash_argument.end(), start, end); |
| 47 | |||
| 48 |
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3 | hash_argument.insert(hash_argument.end(), secret_key.begin(), |
| 49 | secret_key.end()); | ||
| 50 | |||
| 51 | vector_hash hasher; | ||
| 52 | 3 | const auto hash_value = hasher(hash_argument); | |
| 53 | |||
| 54 |
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3 | if (hash_value != stored_hash) |
| 55 |
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1 | return "Invalid code (3)"; |
| 56 |
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3 | } |
| 57 | |||
| 58 | 2 | std::string operand; | |
| 59 | |||
| 60 |
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2 | engine eng{print}; |
| 61 | |||
| 62 |
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11 | for (auto i = payload_offset; i < size; ++i) |
| 63 | { | ||
| 64 |
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9 | const auto value = bytecode.at(i); |
| 65 | |||
| 66 | 9 | language_token t; | |
| 67 |
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9 | if (!get_from_byte_code(value, t)) |
| 68 | ✗ | return "Invalid byte code"; | |
| 69 | |||
| 70 |
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9 | if (t.has_operand) |
| 71 | { | ||
| 72 | // todo: add checks | ||
| 73 | |||
| 74 | 3 | const auto type_size = sizeof(unsigned int); | |
| 75 | 3 | auto operand_size = 0u; | |
| 76 | 3 | i++; | |
| 77 | 3 | memcpy(&operand_size, bytecode.data() + i, type_size); | |
| 78 | |||
| 79 | 3 | i = i + type_size; | |
| 80 | |||
| 81 |
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9 | operand = std::string(bytecode.begin() + i, |
| 82 | 9 | bytecode.begin() + i + operand_size); | |
| 83 | |||
| 84 | 3 | i = i + operand_size - 1; | |
| 85 | } | ||
| 86 | |||
| 87 |
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9 | const auto res = eng.run(t.ID, operand); |
| 88 | |||
| 89 |
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9 | if (!res.empty()) |
| 90 | ✗ | return res; | |
| 91 |
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9 | } |
| 92 | |||
| 93 |
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2 | return ""; |
| 94 | 2 | } | |
| 95 | } // namespace script | ||
| 96 |