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Copy pathpattern.cpp
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72 lines (65 loc) · 1.85 KB
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#include "pattern.hpp"
#include "common.hpp"
namespace memory
{
pattern::pattern(std::string_view ida_sig)
{
auto to_upper = [](char c) -> char {
return c >= 'a' && c <= 'z' ? static_cast<char>(c + ('A' - 'a')) : static_cast<char>(c);
};
auto to_hex = [&](char c) -> std::optional<std::uint8_t> {
switch (to_upper(c))
{
case '0': return static_cast<std::uint8_t>(0);
case '1': return static_cast<std::uint8_t>(1);
case '2': return static_cast<std::uint8_t>(2);
case '3': return static_cast<std::uint8_t>(3);
case '4': return static_cast<std::uint8_t>(4);
case '5': return static_cast<std::uint8_t>(5);
case '6': return static_cast<std::uint8_t>(6);
case '7': return static_cast<std::uint8_t>(7);
case '8': return static_cast<std::uint8_t>(8);
case '9': return static_cast<std::uint8_t>(9);
case 'A': return static_cast<std::uint8_t>(10);
case 'B': return static_cast<std::uint8_t>(11);
case 'C': return static_cast<std::uint8_t>(12);
case 'D': return static_cast<std::uint8_t>(13);
case 'E': return static_cast<std::uint8_t>(14);
case 'F': return static_cast<std::uint8_t>(15);
default: return std::nullopt;
}
};
for (std::size_t i = 0; i < ida_sig.size(); ++i)
{
if (ida_sig[i] == ' ')
continue;
bool last = (i == ida_sig.size() - 1);
if (ida_sig[i] != '?')
{
if (!last)
{
auto c1 = to_hex(ida_sig[i]);
auto c2 = to_hex(ida_sig[i + 1]);
if (c1 && c2)
{
m_bytes.emplace_back(static_cast<std::uint8_t>((*c1 * 0x10) + *c2));
}
}
}
else
{
m_bytes.push_back(std::nullopt);
}
}
}
pattern::pattern(const void* bytes, std::string_view mask)
{
for (std::size_t i = 0; i < mask.size(); ++i)
{
if (mask[i] != '?')
m_bytes.emplace_back(static_cast<const std::uint8_t*>(bytes)[i]);
else
m_bytes.push_back(std::nullopt);
}
}
}