mirror of
https://github.com/akuker/RASCSI.git
synced 2024-11-22 16:33:17 +00:00
112 lines
2.5 KiB
C++
112 lines
2.5 KiB
C++
//---------------------------------------------------------------------------
|
|
//
|
|
// SCSI Target Emulator PiSCSI
|
|
// for Raspberry Pi
|
|
//
|
|
// Copyright (C) 2021-2023 Uwe Seimet
|
|
//
|
|
//---------------------------------------------------------------------------
|
|
|
|
#include "piscsi_version.h"
|
|
#include "piscsi_util.h"
|
|
#include <cassert>
|
|
#include <sstream>
|
|
#include <algorithm>
|
|
|
|
using namespace std;
|
|
|
|
bool piscsi_util::GetAsUnsignedInt(const string& value, int& result)
|
|
{
|
|
if (value.find_first_not_of("0123456789") != string::npos) {
|
|
return false;
|
|
}
|
|
|
|
try {
|
|
auto v = stoul(value);
|
|
result = (int)v;
|
|
}
|
|
catch(const invalid_argument&) {
|
|
return false;
|
|
}
|
|
catch(const out_of_range&) {
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
string piscsi_util::ProcessId(const string& id_spec, int max_luns, int& id, int& lun)
|
|
{
|
|
assert(max_luns > 0);
|
|
|
|
id = -1;
|
|
lun = -1;
|
|
|
|
if (id_spec.empty()) {
|
|
return "Missing device ID";
|
|
}
|
|
|
|
if (const size_t separator_pos = id_spec.find(COMPONENT_SEPARATOR); separator_pos == string::npos) {
|
|
if (!GetAsUnsignedInt(id_spec, id) || id >= 8) {
|
|
id = -1;
|
|
|
|
return "Invalid device ID (0-7)";
|
|
}
|
|
|
|
lun = 0;
|
|
}
|
|
else if (!GetAsUnsignedInt(id_spec.substr(0, separator_pos), id) || id > 7 ||
|
|
!GetAsUnsignedInt(id_spec.substr(separator_pos + 1), lun) || lun >= max_luns) {
|
|
id = -1;
|
|
lun = -1;
|
|
|
|
return "Invalid LUN (0-" + to_string(max_luns - 1) + ")";
|
|
}
|
|
|
|
return "";
|
|
}
|
|
|
|
string piscsi_util::Banner(const string& app)
|
|
{
|
|
ostringstream s;
|
|
|
|
s << "SCSI Target Emulator PiSCSI " << app << "\n";
|
|
s << "Version " << piscsi_get_version_string() << " (" << __DATE__ << ' ' << __TIME__ << ")\n";
|
|
s << "Powered by XM6 TypeG Technology / ";
|
|
s << "Copyright (C) 2016-2020 GIMONS\n";
|
|
s << "Copyright (C) 2020-2023 Contributors to the PiSCSI project\n";
|
|
|
|
return s.str();
|
|
}
|
|
|
|
string piscsi_util::GetExtensionLowerCase(const string& filename)
|
|
{
|
|
string ext;
|
|
if (const size_t separator = filename.rfind('.'); separator != string::npos) {
|
|
ext = filename.substr(separator + 1);
|
|
}
|
|
transform(ext.begin(), ext.end(), ext.begin(), [](unsigned char c){ return std::tolower(c); });
|
|
|
|
return ext;
|
|
}
|
|
|
|
// Pin the thread to a specific CPU
|
|
// TODO Check whether just using a single CPU really makes sense
|
|
void piscsi_util::FixCpu(int cpu)
|
|
{
|
|
#ifdef __linux__
|
|
// Get the number of CPUs
|
|
cpu_set_t mask;
|
|
CPU_ZERO(&mask);
|
|
sched_getaffinity(0, sizeof(cpu_set_t), &mask);
|
|
const int cpus = CPU_COUNT(&mask);
|
|
|
|
// Set the thread affinity
|
|
if (cpu < cpus) {
|
|
CPU_ZERO(&mask);
|
|
CPU_SET(cpu, &mask);
|
|
sched_setaffinity(0, sizeof(cpu_set_t), &mask);
|
|
}
|
|
#endif
|
|
}
|