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examples: Fix and update ExampleHost::copy_code()

This commit is contained in:
Paweł Bylica 2019-10-30 19:03:57 +01:00
parent 9376fa9716
commit db2e830da4
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1 changed files with 11 additions and 11 deletions
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22
examples/example_host.cpp
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@ -10,6 +10,7 @@
#include <evmc/evmc.hpp>
#include <algorithm>
#include <map>
#include <vector>
@ -104,21 +105,20 @@ public:
uint8_t* buffer_data,
size_t buffer_size) noexcept final
{
auto it = accounts.find(addr);
const auto it = accounts.find(addr);
if (it == accounts.end())
return 0;
auto code = it->second.code;
const auto& code = it->second.code;
if (code_offset >= code.size())
return 0;
// TODO: implement this more nicely?
auto begin = code.begin();
auto end = code.end();
std::advance(begin, static_cast<long>(code_offset));
auto len = std::distance(begin, end);
if (len > static_cast<long>(buffer_size))
std::advance(end, len - static_cast<long>(buffer_size));
std::copy(begin, end, buffer_data);
return static_cast<size_t>(len);
const auto n = std::min(buffer_size, code.size() - code_offset);
if (n > 0)
std::copy_n(&code[code_offset], n, buffer_data);
return n;
}
void selfdestruct(const evmc::address& addr, const evmc::address& beneficiary) noexcept final