62 lines
1.6 KiB
C++
62 lines
1.6 KiB
C++
#include "pattern.hpp"
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#include "../common.hpp"
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namespace memory
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{
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std::optional<uint8_t> to_hex(char const c)
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{
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switch (c)
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{
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case '0': return static_cast<uint8_t>(0x0);
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case '1': return static_cast<uint8_t>(0x1);
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case '2': return static_cast<uint8_t>(0x2);
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case '3': return static_cast<uint8_t>(0x3);
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case '4': return static_cast<uint8_t>(0x4);
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case '5': return static_cast<uint8_t>(0x5);
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case '6': return static_cast<uint8_t>(0x6);
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case '7': return static_cast<uint8_t>(0x7);
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case '8': return static_cast<uint8_t>(0x8);
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case '9': return static_cast<uint8_t>(0x9);
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case 'a': return static_cast<uint8_t>(0xa);
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case 'b': return static_cast<uint8_t>(0xb);
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case 'c': return static_cast<uint8_t>(0xc);
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case 'd': return static_cast<uint8_t>(0xd);
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case 'e': return static_cast<uint8_t>(0xe);
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case 'f': return static_cast<uint8_t>(0xf);
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case 'A': return static_cast<uint8_t>(0xA);
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case 'B': return static_cast<uint8_t>(0xB);
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case 'C': return static_cast<uint8_t>(0xC);
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case 'D': return static_cast<uint8_t>(0xD);
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case 'E': return static_cast<uint8_t>(0xE);
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case 'F': return static_cast<uint8_t>(0xF);
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default: return std::nullopt;
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}
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}
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pattern::pattern(std::string_view ida_sig)
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{
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const auto size_minus_one = ida_sig.size() - 1;
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m_bytes.reserve(size_minus_one / 2);
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for (size_t i = 0; i != size_minus_one; ++i)
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{
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if (ida_sig[i] == ' ')
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continue;
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if (ida_sig[i] != '?')
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{
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auto c1 = to_hex(ida_sig[i]);
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auto c2 = to_hex(ida_sig[i + 1]);
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if (c1 && c2)
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{
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m_bytes.emplace_back(static_cast<uint8_t>((*c1 * 0x10) + *c2));
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}
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}
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else
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{
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m_bytes.push_back({});
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}
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}
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}
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}
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