Fossilize/path.cpp at master · ValveSoftware/Fossilize · GitHub

History

434 lines (376 loc) · 9.34 KB

Raw

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

256

257

258

259

260

261

262

263

264

265

266

267

268

269

270

271

272

273

274

275

276

277

278

279

280

281

282

283

284

285

286

287

288

289

290

291

292

293

294

295

296

297

298

299

300

301

302

303

304

305

306

307

308

309

310

311

312

313

314

315

316

317

318

319

320

321

322

323

324

325

326

327

328

329

330

331

332

333

334

335

336

337

338

339

340

341

342

343

344

345

346

347

348

349

350

351

352

353

354

355

356

357

358

359

360

361

362

363

364

365

366

367

368

369

370

371

372

373

374

375

376

377

378

379

380

381

382

383

384

385

386

387

388

389

390

391

392

393

394

395

396

397

398

399

400

401

402

403

404

405

406

407

408

409

410

411

412

413

414

415

416

417

418

419

420

421

422

423

424

425

426

427

428

429

430

431

432

433

434

* Permission is hereby granted, free of charge, to any person obtaining

* a copy of this software and associated documentation files (the

* "Software"), to deal in the Software without restriction, including

* without limitation the rights to use, copy, modify, merge, publish,

* distribute, sublicense, and/or sell copies of the Software, and to

* permit persons to whom the Software is furnished to do so, subject to

* the following conditions:

* The above copyright notice and this permission notice shall be

* included in all copies or substantial portions of the Software.

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.

* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY

* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,

* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE

* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

#include "path.hpp"

#include <algorithm>

#include <sstream>

#ifdef _WIN32

#define WIN32_LEAN_AND_MEAN

#include <windows.h>

#include <sys/stat.h>

#else

#include <unistd.h>

#include <sys/stat.h>

#include <errno.h>

#include <fcntl.h>

#ifdef __linux__

#include <linux/limits.h>

#endif

using namespace std;

namespace Util

{

namespace inner

{

template<typename T>

void join_helper(std::ostringstream &stream, T &&t)

{

stream << std::forward<T>(t);

}

template<typename T, typename... Ts>

void join_helper(std::ostringstream &stream, T &&t, Ts &&... ts)

{

stream << std::forward<T>(t);

join_helper(stream, std::forward<Ts>(ts)...);

}

template<typename... Ts>

std::string join(Ts &&... ts)

{

std::ostringstream stream;

inner::join_helper(stream, std::forward<Ts>(ts)...);

return stream.str();

}

namespace Path

{

static vector<string> split(const string &str, const char *delim, bool allow_empty)

{

if (str.empty())

return {};

vector<string> ret;

size_t start_index = 0;

size_t index = 0;

while ((index = str.find_first_of(delim, start_index)) != string::npos)

{

if (allow_empty || index > start_index)

ret.push_back(str.substr(start_index, index - start_index));

start_index = index + 1;

if (allow_empty && (index == str.size() - 1))

ret.emplace_back();

}

if (start_index < str.size())

ret.push_back(str.substr(start_index));

return ret;

}

vector<string> split(const string &str, const char *delim)

{

return split(str, delim, true);

}

vector<string> split_no_empty(const string &str, const char *delim)

{

return split(str, delim, false);

}

string strip_whitespace(const string &str)

{

string ret;

auto index = str.find_first_not_of(" \t");

if (index == string::npos)

return "";

ret = str.substr(index, string::npos);

index = ret.find_last_not_of(" \t");

if (index != string::npos)

return ret.substr(0, index + 1);

else

return ret;

}

string enforce_protocol(const string &path)

{

if (path.empty())

return "";

auto index = path.find("://");

if (index == string::npos)

return string("file://") + path;

else

return path;

}

string canonicalize_path(const string &path)

{

string transformed;

transformed.resize(path.size());

transform(begin(path), end(path), begin(transformed), [](char c) -> char { return c == '\\' ? '/' : c; });

auto data = split_no_empty(transformed, "/");

vector<string> result;

for (auto &i : data)

{

if (i == "..")

{

if (!result.empty())

result.pop_back();

}

else

result.push_back(std::move(i));

}

string res;

for (auto &i : result)

{

if (&i != result.data())

res += "/";

res += i;

}

return res;

}

static size_t find_last_slash(const string &str)

{

#ifdef _WIN32

auto index = str.find_last_of("/\\");

#else

auto index = str.find_last_of('/');

#endif

return index;

}

bool is_abspath(const string &path)

{

if (path.empty())

return false;

if (path.front() == '/')

return true;

#ifdef _WIN32

{

auto index = (std::min)(path.find(":/"), path.find(":\\"));

if (index != string::npos)

return true;

}

#endif

return path.find("://") != string::npos;

}

bool is_root_path(const string &path)

{

if (path.empty())

return false;

if (path.front() == '/' && path.size() == 1)

return true;

#ifdef _WIN32

{

auto index = (std::min)(path.find(":/"), path.find(":\\"));

if (index != string::npos && (index + 2) == path.size())

return true;

}

#endif

auto index = path.find("://");

return index != string::npos && (index + 3) == path.size();

}

string join(const string &base, const string &path)

{

if (base.empty())

return path;

if (path.empty())

return base;

if (is_abspath(path))

return path;

auto index = find_last_slash(base);

bool need_slash = index != base.size() - 1;

return Util::join(base, need_slash ? "/" : "", path);

}

string basedir(const string &path)

{

if (path.empty())

return "";

if (is_root_path(path))

return path;

auto index = find_last_slash(path);

if (index == string::npos)

return ".";

// Preserve the first slash.

if (index == 0 && is_abspath(path))

index++;

auto ret = path.substr(0, index + 1);

if (!is_root_path(ret))

ret.pop_back();

return ret;

}

string basename(const string &path)

{

if (path.empty())

return "";

auto index = find_last_slash(path);

if (index == string::npos)

return path;

auto base = path.substr(index + 1, string::npos);

return base;

}

string relpath(const string &base, const string &path)

{

return Path::join(basedir(base), path);

}

string ext(const string &path)

{

auto index = path.find_last_of('.');

if (index == string::npos)

return "";

else

return path.substr(index + 1, string::npos);

}

pair<string, string> split(const string &path)

{

if (path.empty())

return make_pair(string("."), string("."));

auto index = find_last_slash(path);

if (index == string::npos)

return make_pair(string("."), path);

auto base = path.substr(index + 1, string::npos);

return make_pair(path.substr(0, index), base);

}

pair<string, string> protocol_split(const string &path)

{

if (path.empty())

return make_pair(string(""), string(""));

auto index = path.find("://");

if (index == string::npos)

return make_pair(string(""), path);

return make_pair(path.substr(0, index), path.substr(index + 3, string::npos));

}

string get_executable_path()

{

#ifdef _WIN32

char target[4096];

DWORD ret = GetModuleFileNameA(GetModuleHandle(nullptr), target, sizeof(target));

target[ret] = '\0';

return canonicalize_path(string(target));

#else

static const char *exts[] = { "exe", "file", "a.out" };

char link_path[PATH_MAX];

char target[PATH_MAX];

for (auto *ext : exts)

{

snprintf(link_path, sizeof(link_path), "/proc/self/%s", ext);

ssize_t ret = readlink(link_path, target, sizeof(target) - 1);

if (ret >= 0)

{

target[ret] = '\0';

return string(target);

}

return "";

#endif

}

bool mkdir(const std::string &path)

{

#ifdef _WIN32

if (!CreateDirectoryA(path.c_str(), nullptr))

{

if (GetLastError() != ERROR_ALREADY_EXISTS)

return false;

if (!is_directory(path))

return false;

}

return true;

#else

int ret = ::mkdir(path.c_str(), 0750);

if (ret == 0)

return true;

if (ret < 0 && errno != EEXIST)

return false;

// Verify the path is actually a directory.

struct stat s = {};

return ::stat(path.c_str(), &s) == 0 && (s.st_mode & S_IFDIR) != 0;

#endif

}

bool touch(const std::string &path)

{

#ifdef _WIN32

HANDLE h = CreateFileA(path.c_str(), GENERIC_WRITE, FILE_SHARE_WRITE | FILE_SHARE_READ,

nullptr, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL,

INVALID_HANDLE_VALUE);

if (h == INVALID_HANDLE_VALUE)

return false;

SYSTEMTIME st;

FILETIME ft;

GetSystemTime(&st);

SystemTimeToFileTime(&st, &ft);

bool success = SetFileTime(h, nullptr, nullptr, &ft) != 0;

CloseHandle(h);

return success;

#else

int fd = ::open(path.c_str(), O_WRONLY | O_CREAT | O_TRUNC, 0640);

if (fd < 0)

return false;

const struct timespec times[2] = {{ 0, UTIME_NOW }, { 0, UTIME_NOW }};

bool ret = ::futimens(fd, times) == 0;

::close(fd);

return ret;

#endif

}

bool is_file(const std::string &path)

{

#ifdef _WIN32

struct __stat64 s;

if (_stat64(path.c_str(), &s) < 0)

return false;

return (s.st_mode & _S_IFREG) != 0;

#else

struct stat s = {};

return ::stat(path.c_str(), &s) == 0 && (s.st_mode & S_IFREG) != 0;

#endif

}

bool is_directory(const std::string &path)

{

#ifdef _WIN32

struct __stat64 s;

if (_stat64(path.c_str(), &s) < 0)

return false;

return (s.st_mode & _S_IFDIR) != 0;

#else

struct stat s = {};

return ::stat(path.c_str(), &s) == 0 && (s.st_mode & S_IFDIR) != 0;

#endif

}

bool get_mtime_us(const std::string &path, uint64_t &mtime_us)

{

#ifdef _WIN32

HANDLE h = CreateFileA(path.c_str(), GENERIC_READ, FILE_SHARE_READ,

nullptr, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL,

INVALID_HANDLE_VALUE);

if (h == INVALID_HANDLE_VALUE)

return false;

FILETIME ft;

if (!GetFileTime(h, nullptr, nullptr, &ft))

{

CloseHandle(h);

return false;

}

mtime_us = ((uint64_t(ft.dwHighDateTime) << 32) | uint64_t(ft.dwLowDateTime)) / 10;

CloseHandle(h);

return true;

#else

struct stat s = {};

if (::stat(path.c_str(), &s) != 0)

return false;

#if defined(__linux__)

mtime_us = s.st_mtim.tv_sec * 1000000ll + s.st_mtim.tv_nsec / 1000;

#else

// Fallback.

mtime_us = s.st_mtime * 1000000ll;

#endif

return true;

#endif

}

Fossilize/path.cpp at master · ValveSoftware/Fossilize · GitHub

Uh oh!

Expand file tree

Breadcrumbs

path.cpp

Latest commit

History

Breadcrumbs

path.cpp

File metadata and controls