android-database-sqlcipher/external/String16.cpp at master · developernotes/android-database-sqlcipher · GitHub

History

634 lines (544 loc) · 14.9 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

435

436

437

438

439

440

441

442

443

444

445

446

447

448

449

450

451

452

453

454

455

456

457

458

459

460

461

462

463

464

465

466

467

468

469

470

471

472

473

474

475

476

477

478

479

480

481

482

483

484

485

486

487

488

489

490

491

492

493

494

495

496

497

498

499

500

501

502

503

504

505

506

507

508

509

510

511

512

513

514

515

516

517

518

519

520

521

522

523

524

525

526

527

528

529

530

531

532

533

534

535

536

537

538

539

540

541

542

543

544

545

546

547

548

549

550

551

552

553

554

555

556

557

558

559

560

561

562

563

564

565

566

567

568

569

570

571

572

573

574

575

576

577

578

579

580

581

582

583

584

585

586

587

588

589

590

591

592

593

594

595

596

597

598

599

600

601

602

603

604

605

606

607

608

609

610

611

612

613

614

615

616

617

618

619

620

621

622

623

624

625

626

627

628

629

630

631

632

633

634

* Licensed under the Apache License, Version 2.0 (the "License");

* you may not use this file except in compliance with the License.

* You may obtain a copy of the License at

* http://www.apache.org/licenses/LICENSE-2.0

* Unless required by applicable law or agreed to in writing, software

* distributed under the License is distributed on an "AS IS" BASIS,

* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

* See the License for the specific language governing permissions and

* limitations under the License.

#include <utils/String16.h>

#include <utils/Debug.h>

#include <utils/Log.h>

#include <utils/String8.h>

#include <utils/TextOutput.h>

#include <utils/threads.h>

#include <private/utils/Static.h>

#ifdef HAVE_WINSOCK

# undef nhtol

# undef htonl

# undef nhtos

# undef htons

# ifdef HAVE_LITTLE_ENDIAN

# define ntohl(x) ( ((x) << 24) | (((x) >> 24) & 255) | (((x) << 8) & 0xff0000) | (((x) >> 8) & 0xff00) )

# define htonl(x) ntohl(x)

# define ntohs(x) ( (((x) << 8) & 0xff00) | (((x) >> 8) & 255) )

# define htons(x) ntohs(x)

# else

# define ntohl(x) (x)

# define htonl(x) (x)

# define ntohs(x) (x)

# define htons(x) (x)

# endif

#else

//# include <netinet/in.h>

# include <sys/endian.h>

#endif

#include <memory.h>

#include <stdio.h>

#include <ctype.h>

// ---------------------------------------------------------------------------

int strcmp16(const char16_t *s1, const char16_t *s2)

{

char16_t ch;

int d = 0;

while ( 1 ) {

d = (int)(ch = *s1++) - (int)*s2++;

if ( d || !ch )

break;

}

return d;

}

int strncmp16(const char16_t *s1, const char16_t *s2, size_t n)

{

char16_t ch;

int d = 0;

while ( n-- ) {

d = (int)(ch = *s1++) - (int)*s2++;

if ( d || !ch )

break;

}

return d;

}

char16_t *strcpy16(char16_t *dst, const char16_t *src)

{

char16_t *q = dst;

const char16_t *p = src;

char16_t ch;

do {

*q++ = ch = *p++;

} while ( ch );

return dst;

}

size_t strlen16(const char16_t *s)

{

const char16_t *ss = s;

while ( *ss )

ss++;

return ss-s;

}

char16_t *strncpy16(char16_t *dst, const char16_t *src, size_t n)

{

char16_t *q = dst;

const char16_t *p = src;

char ch;

while (n) {

n--;

*q++ = ch = *p++;

if ( !ch )

break;

}

*q = 0;

return dst;

}

size_t strnlen16(const char16_t *s, size_t maxlen)

{

const char16_t *ss = s;

/* Important: the maxlen test must precede the reference through ss;

since the byte beyond the maximum may segfault */

while ((maxlen > 0) && *ss) {

ss++;

maxlen--;

}

return ss-s;

}

int strzcmp16(const char16_t *s1, size_t n1, const char16_t *s2, size_t n2)

{

const char16_t* e1 = s1+n1;

const char16_t* e2 = s2+n2;

while (s1 < e1 && s2 < e2) {

const int d = (int)*s1++ - (int)*s2++;

if (d) {

return d;

}

return n1 < n2

? (0 - (int)*s2)

: (n1 > n2

? ((int)*s1 - 0)

: 0);

}

int strzcmp16_h_n(const char16_t *s1H, size_t n1, const char16_t *s2N, size_t n2)

{

const char16_t* e1 = s1H+n1;

const char16_t* e2 = s2N+n2;

while (s1H < e1 && s2N < e2) {

const char16_t c2 = ntohs(*s2N);

const int d = (int)*s1H++ - (int)c2;

s2N++;

if (d) {

return d;

}

return n1 < n2

? (0 - (int)ntohs(*s2N))

: (n1 > n2

? ((int)*s1H - 0)

: 0);

}

static inline size_t

utf8_char_len(uint8_t ch)

{

return ((0xe5000000 >> ((ch >> 3) & 0x1e)) & 3) + 1;

}

#define UTF8_SHIFT_AND_MASK(unicode, byte) (unicode)<<=6; (unicode) |= (0x3f & (byte));

static inline uint32_t

utf8_to_utf32(const uint8_t *src, size_t length)

{

uint32_t unicode;

switch (length)

{

case 1:

return src[0];

case 2:

unicode = src[0] & 0x1f;

UTF8_SHIFT_AND_MASK(unicode, src[1])

return unicode;

case 3:

unicode = src[0] & 0x0f;

UTF8_SHIFT_AND_MASK(unicode, src[1])

UTF8_SHIFT_AND_MASK(unicode, src[2])

return unicode;

case 4:

unicode = src[0] & 0x07;

UTF8_SHIFT_AND_MASK(unicode, src[1])

UTF8_SHIFT_AND_MASK(unicode, src[2])

UTF8_SHIFT_AND_MASK(unicode, src[3])

return unicode;

default:

return 0xffff;

}

//printf("Char at %p: len=%d, utf-16=%p\n", src, length, (void*)result);

}

void

utf8_to_utf16(const uint8_t *src, size_t srcLen,

char16_t* dst, const size_t dstLen)

{

const uint8_t* const end = src + srcLen;

const char16_t* const dstEnd = dst + dstLen;

while (src < end && dst < dstEnd) {

size_t len = utf8_char_len(*src);

uint32_t codepoint = utf8_to_utf32((const uint8_t*)src, len);

// Convert the UTF32 codepoint to one or more UTF16 codepoints

if (codepoint <= 0xFFFF) {

// Single UTF16 character

*dst++ = (char16_t) codepoint;

} else {

// Multiple UTF16 characters with surrogates

codepoint = codepoint - 0x10000;

*dst++ = (char16_t) ((codepoint >> 10) + 0xD800);

*dst++ = (char16_t) ((codepoint & 0x3FF) + 0xDC00);

}

src += len;

}

if (dst < dstEnd) {

*dst = 0;

}

// ---------------------------------------------------------------------------

namespace android {

static SharedBuffer* gEmptyStringBuf = NULL;

static char16_t* gEmptyString = NULL;

static inline char16_t* getEmptyString()

{

gEmptyStringBuf->acquire();

return gEmptyString;

}

void initialize_string16()

{

SharedBuffer* buf = SharedBuffer::alloc(sizeof(char16_t));

char16_t* str = (char16_t*)buf->data();

*str = 0;

gEmptyStringBuf = buf;

gEmptyString = str;

}

void terminate_string16()

{

SharedBuffer::bufferFromData(gEmptyString)->release();

gEmptyStringBuf = NULL;

gEmptyString = NULL;

}

// ---------------------------------------------------------------------------

static char16_t* allocFromUTF8(const char* in, size_t len)

{

if (len == 0) return getEmptyString();

size_t chars = 0;

const char* end = in+len;

const char* p = in;

while (p < end) {

chars++;

int utf8len = utf8_char_len(*p);

uint32_t codepoint = utf8_to_utf32((const uint8_t*)p, utf8len);

if (codepoint > 0xFFFF) chars++; // this will be a surrogate pair in utf16

p += utf8len;

}

size_t bufSize = (chars+1)*sizeof(char16_t);

SharedBuffer* buf = SharedBuffer::alloc(bufSize);

if (buf) {

p = in;

char16_t* str = (char16_t*)buf->data();

utf8_to_utf16((const uint8_t*)p, len, str, bufSize);

//printf("Created UTF-16 string from UTF-8 \"%s\":", in);

//printHexData(1, str, buf->size(), 16, 1);

//printf("\n");

return str;

}

return getEmptyString();

}

// ---------------------------------------------------------------------------

String16::String16()

: mString(getEmptyString())

{

}

String16::String16(const String16& o)

: mString(o.mString)

{

SharedBuffer::bufferFromData(mString)->acquire();

}

String16::String16(const String16& o, size_t len, size_t begin)

: mString(getEmptyString())

{

setTo(o, len, begin);

}

String16::String16(const char16_t* o)

{

size_t len = strlen16(o);

SharedBuffer* buf = SharedBuffer::alloc((len+1)*sizeof(char16_t));

LOG_ASSERT(buf, "Unable to allocate shared buffer");

if (buf) {

char16_t* str = (char16_t*)buf->data();

strcpy16(str, o);

mString = str;

return;

}

mString = getEmptyString();

}

String16::String16(const char16_t* o, size_t len)

{

SharedBuffer* buf = SharedBuffer::alloc((len+1)*sizeof(char16_t));

LOG_ASSERT(buf, "Unable to allocate shared buffer");

if (buf) {

char16_t* str = (char16_t*)buf->data();

memcpy(str, o, len*sizeof(char16_t));

str[len] = 0;

mString = str;

return;

}

mString = getEmptyString();

}

String16::String16(const String8& o)

: mString(allocFromUTF8(o.string(), o.size()))

{

}

String16::String16(const char* o)

: mString(allocFromUTF8(o, strlen(o)))

{

}

String16::String16(const char* o, size_t len)

: mString(allocFromUTF8(o, len))

{

}

String16::~String16()

{

SharedBuffer::bufferFromData(mString)->release();

}

void String16::setTo(const String16& other)

{

SharedBuffer::bufferFromData(other.mString)->acquire();

SharedBuffer::bufferFromData(mString)->release();

mString = other.mString;

}

status_t String16::setTo(const String16& other, size_t len, size_t begin)

{

const size_t N = other.size();

if (begin >= N) {

SharedBuffer::bufferFromData(mString)->release();

mString = getEmptyString();

return NO_ERROR;

}

if ((begin+len) > N) len = N-begin;

if (begin == 0 && len == N) {

setTo(other);

return NO_ERROR;

}

if (&other == this) {

LOG_ALWAYS_FATAL("Not implemented");

}

return setTo(other.string()+begin, len);

}

status_t String16::setTo(const char16_t* other)

{

return setTo(other, strlen16(other));

}

status_t String16::setTo(const char16_t* other, size_t len)

{

SharedBuffer* buf = SharedBuffer::bufferFromData(mString)

->editResize((len+1)*sizeof(char16_t));

if (buf) {

char16_t* str = (char16_t*)buf->data();

memmove(str, other, len*sizeof(char16_t));

str[len] = 0;

mString = str;

return NO_ERROR;

}

return NO_MEMORY;

}

status_t String16::append(const String16& other)

{

const size_t myLen = size();

const size_t otherLen = other.size();

if (myLen == 0) {

setTo(other);

return NO_ERROR;

} else if (otherLen == 0) {

return NO_ERROR;

}

SharedBuffer* buf = SharedBuffer::bufferFromData(mString)

->editResize((myLen+otherLen+1)*sizeof(char16_t));

if (buf) {

char16_t* str = (char16_t*)buf->data();

memcpy(str+myLen, other, (otherLen+1)*sizeof(char16_t));

mString = str;

return NO_ERROR;

}

return NO_MEMORY;

}

status_t String16::append(const char16_t* chrs, size_t otherLen)

{

const size_t myLen = size();

if (myLen == 0) {

setTo(chrs, otherLen);

return NO_ERROR;

} else if (otherLen == 0) {

return NO_ERROR;

}

SharedBuffer* buf = SharedBuffer::bufferFromData(mString)

->editResize((myLen+otherLen+1)*sizeof(char16_t));

if (buf) {

char16_t* str = (char16_t*)buf->data();

memcpy(str+myLen, chrs, otherLen*sizeof(char16_t));

str[myLen+otherLen] = 0;

mString = str;

return NO_ERROR;

}

return NO_MEMORY;

}

status_t String16::insert(size_t pos, const char16_t* chrs)

{

return insert(pos, chrs, strlen16(chrs));

}

status_t String16::insert(size_t pos, const char16_t* chrs, size_t len)

{

const size_t myLen = size();

if (myLen == 0) {

return setTo(chrs, len);

return NO_ERROR;

} else if (len == 0) {

return NO_ERROR;

}

if (pos > myLen) pos = myLen;

#if 0

printf("Insert in to %s: pos=%d, len=%d, myLen=%d, chrs=%s\n",

String8(*this).string(), pos,

len, myLen, String8(chrs, len).string());

#endif

SharedBuffer* buf = SharedBuffer::bufferFromData(mString)

->editResize((myLen+len+1)*sizeof(char16_t));

if (buf) {

char16_t* str = (char16_t*)buf->data();

if (pos < myLen) {

memmove(str+pos+len, str+pos, (myLen-pos)*sizeof(char16_t));

}

memcpy(str+pos, chrs, len*sizeof(char16_t));

str[myLen+len] = 0;

mString = str;

#if 0

printf("Result (%d chrs): %s\n", size(), String8(*this).string());

#endif

return NO_ERROR;

}

return NO_MEMORY;

}

ssize_t String16::findFirst(char16_t c) const

{

const char16_t* str = string();

const char16_t* p = str;

const char16_t* e = p + size();

while (p < e) {

if (*p == c) {

return p-str;

}

p++;

}

return -1;

}

ssize_t String16::findLast(char16_t c) const

{

const char16_t* str = string();

const char16_t* p = str;

const char16_t* e = p + size();

while (p < e) {

e--;

if (*e == c) {

return e-str;

}

return -1;

}

bool String16::startsWith(const String16& prefix) const

{

const size_t ps = prefix.size();

if (ps > size()) return false;

return strzcmp16(mString, ps, prefix.string(), ps) == 0;

}

bool String16::startsWith(const char16_t* prefix) const

{

const size_t ps = strlen16(prefix);

if (ps > size()) return false;

return strncmp16(mString, prefix, ps) == 0;

}

status_t String16::makeLower()

{

const size_t N = size();

const char16_t* str = string();

char16_t* edit = NULL;

for (size_t i=0; i<N; i++) {

const char16_t v = str[i];

if (v >= 'A' && v <= 'Z') {

if (!edit) {

SharedBuffer* buf = SharedBuffer::bufferFromData(mString)->edit();

if (!buf) {

return NO_MEMORY;

}

edit = (char16_t*)buf->data();

mString = str = edit;

}

edit[i] = tolower((char)v);

}

return NO_ERROR;

}

status_t String16::replaceAll(char16_t replaceThis, char16_t withThis)

{

const size_t N = size();

const char16_t* str = string();

char16_t* edit = NULL;

for (size_t i=0; i<N; i++) {

if (str[i] == replaceThis) {

if (!edit) {

SharedBuffer* buf = SharedBuffer::bufferFromData(mString)->edit();

if (!buf) {

return NO_MEMORY;

}

edit = (char16_t*)buf->data();

mString = str = edit;

}

edit[i] = withThis;

}

return NO_ERROR;

}

status_t String16::remove(size_t len, size_t begin)

{

const size_t N = size();

if (begin >= N) {

SharedBuffer::bufferFromData(mString)->release();

mString = getEmptyString();

return NO_ERROR;

}

if ((begin+len) > N) len = N-begin;

if (begin == 0 && len == N) {

return NO_ERROR;

}

if (begin > 0) {

SharedBuffer* buf = SharedBuffer::bufferFromData(mString)

->editResize((N+1)*sizeof(char16_t));

if (!buf) {

return NO_MEMORY;

}

char16_t* str = (char16_t*)buf->data();

memmove(str, str+begin, (N-begin+1)*sizeof(char16_t));

mString = str;

}

SharedBuffer* buf = SharedBuffer::bufferFromData(mString)

->editResize((len+1)*sizeof(char16_t));

if (buf) {

char16_t* str = (char16_t*)buf->data();

str[len] = 0;

mString = str;

return NO_ERROR;

}

return NO_MEMORY;

}

TextOutput& operator<<(TextOutput& to, const String16& val)

{

to << String8(val).string();

return to;

}

}; // namespace android

android-database-sqlcipher/external/String16.cpp at master · developernotes/android-database-sqlcipher · GitHub

Expand file tree

Breadcrumbs

String16.cpp

Latest commit

History

Breadcrumbs

String16.cpp

File metadata and controls