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#include "utils/platform/ready_string_finder.h"
#include <sstream>
#include <cstddef>
namespace TangoTest::platform
{
ReadyStringFinder::ReadyStringFinder(const std::string &filename) :
m_file{filename}
{
if(m_file.bad())
{
std::stringstream ss;
ss << "failed to open \"" << filename << "\"";
throw std::runtime_error(ss.str());
}
}
bool ReadyStringFinder::check_for_ready_string(const std::string &ready_string)
{
while(true)
{
std::string line;
std::getline(m_file, line);
// Didn't hit a \n, so "put the line back" so we can try again
// next time.
if(m_file.eof())
{
auto offset = -static_cast<ptrdiff_t>(line.size());
// clear needs to happen here.
// The reason being that on macOS seekg fails when
// fail bit is set. We hope that it is a libc++ thing
// and not a implementation detail that could bite us
// again when implementing the Windows version.
m_file.clear();
m_file.seekg(offset, std::ios_base::cur);
return false;
}
if(m_file.fail())
{
throw std::runtime_error("getline() failed");
}
if(line.find(ready_string) != std::string::npos)
{
return true;
}
}
}
} // namespace TangoTest::platform
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