reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1 | /* libs/graphics/sgl/SkString.cpp |
| 2 | ** |
| 3 | ** Copyright 2006, The Android Open Source Project |
| 4 | ** |
reed@google.com | fa06e52 | 2011-02-28 21:29:58 +0000 | [diff] [blame] | 5 | ** Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 | ** you may not use this file except in compliance with the License. |
| 7 | ** You may obtain a copy of the License at |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 8 | ** |
reed@google.com | fa06e52 | 2011-02-28 21:29:58 +0000 | [diff] [blame] | 9 | ** http://www.apache.org/licenses/LICENSE-2.0 |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 10 | ** |
reed@google.com | fa06e52 | 2011-02-28 21:29:58 +0000 | [diff] [blame] | 11 | ** Unless required by applicable law or agreed to in writing, software |
| 12 | ** distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | ** See the License for the specific language governing permissions and |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 15 | ** limitations under the License. |
| 16 | */ |
| 17 | |
| 18 | #include "SkString.h" |
| 19 | #include "SkFixed.h" |
| 20 | #include "SkUtils.h" |
| 21 | #include <stdarg.h> |
reed@google.com | fa06e52 | 2011-02-28 21:29:58 +0000 | [diff] [blame] | 22 | #include <stdio.h> |
| 23 | |
| 24 | // number of bytes (on the stack) to receive the printf result |
| 25 | static const size_t kBufferSize = 256; |
| 26 | |
| 27 | #ifdef SK_BUILD_FOR_WIN |
| 28 | #define VSNPRINTF _vsnprintf |
| 29 | #define SNPRINTF _snprintf |
| 30 | #else |
| 31 | #define VSNPRINTF vsnprintf |
| 32 | #define SNPRINTF snprintf |
| 33 | #endif |
| 34 | |
| 35 | #define ARGS_TO_BUFFER(format, buffer, size) \ |
| 36 | do { \ |
| 37 | va_list args; \ |
| 38 | va_start(args, format); \ |
| 39 | VSNPRINTF(buffer, size, format, args); \ |
| 40 | va_end(args); \ |
| 41 | } while (0) |
| 42 | |
| 43 | /////////////////////////////////////////////////////////////////////////////// |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 44 | |
| 45 | bool SkStrStartsWith(const char string[], const char prefix[]) |
| 46 | { |
| 47 | SkASSERT(string); |
| 48 | SkASSERT(prefix); |
| 49 | return !strncmp(string, prefix, strlen(prefix)); |
| 50 | } |
| 51 | |
| 52 | bool SkStrEndsWith(const char string[], const char suffix[]) |
| 53 | { |
| 54 | SkASSERT(string); |
| 55 | SkASSERT(suffix); |
| 56 | size_t strLen = strlen(string); |
| 57 | size_t suffixLen = strlen(suffix); |
| 58 | return strLen >= suffixLen && |
| 59 | !strncmp(string + strLen - suffixLen, suffix, suffixLen); |
| 60 | } |
| 61 | |
| 62 | int SkStrStartsWithOneOf(const char string[], const char prefixes[]) |
| 63 | { |
| 64 | int index = 0; |
| 65 | do { |
| 66 | const char* limit = strchr(prefixes, '\0'); |
| 67 | if (!strncmp(string, prefixes, limit - prefixes)) |
| 68 | return index; |
| 69 | prefixes = limit + 1; |
| 70 | index++; |
| 71 | } while (prefixes[0]); |
| 72 | return -1; |
| 73 | } |
| 74 | |
| 75 | char* SkStrAppendS32(char string[], int32_t dec) |
| 76 | { |
| 77 | SkDEBUGCODE(char* start = string;) |
| 78 | |
| 79 | char buffer[SkStrAppendS32_MaxSize]; |
| 80 | char* p = buffer + sizeof(buffer); |
| 81 | bool neg = false; |
| 82 | |
| 83 | if (dec < 0) |
| 84 | { |
| 85 | neg = true; |
| 86 | dec = -dec; |
| 87 | } |
| 88 | do { |
| 89 | *--p = SkToU8('0' + dec % 10); |
| 90 | dec /= 10; |
| 91 | } while (dec != 0); |
| 92 | if (neg) |
| 93 | *--p = '-'; |
| 94 | |
| 95 | SkASSERT(p >= buffer); |
| 96 | char* stop = buffer + sizeof(buffer); |
| 97 | while (p < stop) |
| 98 | *string++ = *p++; |
| 99 | |
| 100 | SkASSERT(string - start <= SkStrAppendS32_MaxSize); |
| 101 | return string; |
| 102 | } |
| 103 | |
vandebo@chromium.org | d877fdb | 2010-10-12 23:08:13 +0000 | [diff] [blame] | 104 | char* SkStrAppendS64(char string[], int64_t dec, int minDigits) |
| 105 | { |
| 106 | SkDEBUGCODE(char* start = string;) |
| 107 | |
| 108 | char buffer[SkStrAppendS64_MaxSize]; |
| 109 | char* p = buffer + sizeof(buffer); |
| 110 | bool neg = false; |
| 111 | |
| 112 | if (dec < 0) { |
| 113 | neg = true; |
| 114 | dec = -dec; |
| 115 | } |
| 116 | do { |
| 117 | *--p = SkToU8('0' + dec % 10); |
| 118 | dec /= 10; |
| 119 | minDigits--; |
| 120 | } while (dec != 0); |
| 121 | while (minDigits > 0) { |
| 122 | *--p = '0'; |
| 123 | minDigits--; |
| 124 | } |
| 125 | if (neg) |
| 126 | *--p = '-'; |
| 127 | |
| 128 | SkASSERT(p >= buffer); |
| 129 | size_t cp_len = buffer + sizeof(buffer) - p; |
| 130 | memcpy(string, p, cp_len); |
| 131 | string += cp_len; |
| 132 | |
| 133 | SkASSERT(string - start <= SkStrAppendS64_MaxSize); |
| 134 | return string; |
| 135 | } |
| 136 | |
vandebo@chromium.org | 677cbed | 2011-03-03 18:20:12 +0000 | [diff] [blame^] | 137 | #ifdef SK_CAN_USE_FLOAT |
| 138 | char* SkStrAppendFloat(char string[], float value) |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 139 | { |
reed@google.com | 8072e4f | 2011-03-01 15:44:08 +0000 | [diff] [blame] | 140 | // since floats have at most 8 significant digits, we limit our %g to that. |
| 141 | static const char gFormat[] = "%.8g"; |
| 142 | // make it 1 larger for the terminating 0 |
| 143 | char buffer[SkStrAppendScalar_MaxSize + 1]; |
| 144 | int len = SNPRINTF(buffer, sizeof(buffer), gFormat, value); |
| 145 | memcpy(string, buffer, len); |
vandebo@chromium.org | 677cbed | 2011-03-03 18:20:12 +0000 | [diff] [blame^] | 146 | SkASSERT(len <= SkStrAppendScalar_MaxSize); |
reed@google.com | 8072e4f | 2011-03-01 15:44:08 +0000 | [diff] [blame] | 147 | return string + len; |
vandebo@chromium.org | 677cbed | 2011-03-03 18:20:12 +0000 | [diff] [blame^] | 148 | } |
| 149 | #endif |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 150 | |
vandebo@chromium.org | 677cbed | 2011-03-03 18:20:12 +0000 | [diff] [blame^] | 151 | char* SkStrAppendFixed(char string[], SkFixed x) |
| 152 | { |
| 153 | SkDEBUGCODE(char* start = string;) |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 154 | if (x < 0) |
| 155 | { |
| 156 | *string++ = '-'; |
| 157 | x = -x; |
| 158 | } |
| 159 | |
| 160 | unsigned frac = x & 0xFFFF; |
| 161 | x >>= 16; |
| 162 | if (frac == 0xFFFF) // need to do this to "round up", since 65535/65536 is closer to 1 than to .9999 |
| 163 | { |
| 164 | x += 1; |
| 165 | frac = 0; |
| 166 | } |
| 167 | string = SkStrAppendS32(string, x); |
| 168 | |
| 169 | // now handle the fractional part (if any) |
| 170 | if (frac) |
| 171 | { |
| 172 | static const uint16_t gTens[] = { 1000, 100, 10, 1 }; |
| 173 | const uint16_t* tens = gTens; |
| 174 | |
| 175 | x = SkFixedRound(frac * 10000); |
| 176 | SkASSERT(x <= 10000); |
| 177 | if (x == 10000) { |
| 178 | x -= 1; |
| 179 | } |
| 180 | *string++ = '.'; |
| 181 | do { |
| 182 | unsigned powerOfTen = *tens++; |
| 183 | *string++ = SkToU8('0' + x / powerOfTen); |
| 184 | x %= powerOfTen; |
| 185 | } while (x != 0); |
| 186 | } |
reed@google.com | fa06e52 | 2011-02-28 21:29:58 +0000 | [diff] [blame] | 187 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 188 | SkASSERT(string - start <= SkStrAppendScalar_MaxSize); |
| 189 | return string; |
| 190 | } |
| 191 | |
| 192 | //////////////////////////////////////////////////////////////////////////////////// |
| 193 | |
| 194 | #define kMaxRefCnt_SkString SK_MaxU16 |
| 195 | |
| 196 | // the 3 values are [length] [refcnt] [terminating zero data] |
| 197 | const SkString::Rec SkString::gEmptyRec = { 0, 0, 0 }; |
| 198 | |
| 199 | #define SizeOfRec() (gEmptyRec.data() - (const char*)&gEmptyRec) |
| 200 | |
| 201 | SkString::Rec* SkString::AllocRec(const char text[], U16CPU len) |
| 202 | { |
| 203 | Rec* rec; |
| 204 | |
| 205 | if (len == 0) |
| 206 | rec = const_cast<Rec*>(&gEmptyRec); |
| 207 | else |
| 208 | { |
| 209 | // add 1 for terminating 0, then align4 so we can have some slop when growing the string |
| 210 | rec = (Rec*)sk_malloc_throw(SizeOfRec() + SkAlign4(len + 1)); |
| 211 | rec->fLength = SkToU16(len); |
| 212 | rec->fRefCnt = 1; |
| 213 | if (text) |
| 214 | memcpy(rec->data(), text, len); |
| 215 | rec->data()[len] = 0; |
| 216 | } |
| 217 | return rec; |
| 218 | } |
| 219 | |
| 220 | SkString::Rec* SkString::RefRec(Rec* src) |
| 221 | { |
| 222 | if (src != &gEmptyRec) |
| 223 | { |
| 224 | if (src->fRefCnt == kMaxRefCnt_SkString) { |
| 225 | src = AllocRec(src->data(), src->fLength); |
| 226 | } else |
| 227 | src->fRefCnt += 1; |
| 228 | } |
| 229 | return src; |
| 230 | } |
| 231 | |
| 232 | #ifdef SK_DEBUG |
| 233 | void SkString::validate() const |
| 234 | { |
| 235 | // make sure know one has written over our global |
| 236 | SkASSERT(gEmptyRec.fLength == 0); |
| 237 | SkASSERT(gEmptyRec.fRefCnt == 0); |
| 238 | SkASSERT(gEmptyRec.data()[0] == 0); |
| 239 | |
| 240 | if (fRec != &gEmptyRec) |
| 241 | { |
| 242 | SkASSERT(fRec->fLength > 0); |
| 243 | SkASSERT(fRec->fRefCnt > 0); |
| 244 | SkASSERT(fRec->data()[fRec->fLength] == 0); |
| 245 | } |
| 246 | SkASSERT(fStr == c_str()); |
| 247 | } |
| 248 | #endif |
| 249 | |
| 250 | /////////////////////////////////////////////////////////////////////// |
| 251 | |
| 252 | SkString::SkString() : fRec(const_cast<Rec*>(&gEmptyRec)) { |
| 253 | #ifdef SK_DEBUG |
| 254 | fStr = fRec->data(); |
| 255 | #endif |
| 256 | } |
| 257 | |
| 258 | SkString::SkString(size_t len) |
| 259 | { |
| 260 | SkASSERT(SkToU16(len) == len); // can't handle larger than 64K |
| 261 | |
| 262 | fRec = AllocRec(NULL, (U16CPU)len); |
| 263 | #ifdef SK_DEBUG |
| 264 | fStr = fRec->data(); |
| 265 | #endif |
| 266 | } |
| 267 | |
| 268 | SkString::SkString(const char text[]) |
| 269 | { |
| 270 | size_t len = text ? strlen(text) : 0; |
| 271 | |
| 272 | fRec = AllocRec(text, (U16CPU)len); |
| 273 | #ifdef SK_DEBUG |
| 274 | fStr = fRec->data(); |
| 275 | #endif |
| 276 | } |
| 277 | |
| 278 | SkString::SkString(const char text[], size_t len) |
| 279 | { |
| 280 | fRec = AllocRec(text, (U16CPU)len); |
| 281 | #ifdef SK_DEBUG |
| 282 | fStr = fRec->data(); |
| 283 | #endif |
| 284 | } |
| 285 | |
| 286 | SkString::SkString(const SkString& src) |
| 287 | { |
| 288 | src.validate(); |
| 289 | |
| 290 | fRec = RefRec(src.fRec); |
| 291 | #ifdef SK_DEBUG |
| 292 | fStr = fRec->data(); |
| 293 | #endif |
| 294 | } |
| 295 | |
| 296 | SkString::~SkString() |
| 297 | { |
| 298 | this->validate(); |
| 299 | |
| 300 | if (fRec->fLength) |
| 301 | { |
| 302 | SkASSERT(fRec->fRefCnt > 0); |
| 303 | if (--fRec->fRefCnt == 0) |
| 304 | sk_free(fRec); |
| 305 | } |
| 306 | } |
| 307 | |
| 308 | bool SkString::equals(const SkString& src) const |
| 309 | { |
| 310 | return fRec == src.fRec || this->equals(src.c_str(), src.size()); |
| 311 | } |
| 312 | |
| 313 | bool SkString::equals(const char text[]) const |
| 314 | { |
| 315 | return this->equals(text, text ? strlen(text) : 0); |
| 316 | } |
| 317 | |
| 318 | bool SkString::equals(const char text[], size_t len) const |
| 319 | { |
| 320 | SkASSERT(len == 0 || text != NULL); |
| 321 | |
| 322 | return fRec->fLength == len && !memcmp(fRec->data(), text, len); |
| 323 | } |
| 324 | |
| 325 | SkString& SkString::operator=(const SkString& src) |
| 326 | { |
| 327 | this->validate(); |
| 328 | |
| 329 | if (fRec != src.fRec) |
| 330 | { |
| 331 | SkString tmp(src); |
| 332 | this->swap(tmp); |
| 333 | } |
| 334 | return *this; |
| 335 | } |
| 336 | |
| 337 | void SkString::reset() |
| 338 | { |
| 339 | this->validate(); |
| 340 | |
| 341 | if (fRec->fLength) |
| 342 | { |
| 343 | SkASSERT(fRec->fRefCnt > 0); |
| 344 | if (--fRec->fRefCnt == 0) |
| 345 | sk_free(fRec); |
| 346 | } |
| 347 | |
| 348 | fRec = const_cast<Rec*>(&gEmptyRec); |
| 349 | #ifdef SK_DEBUG |
| 350 | fStr = fRec->data(); |
| 351 | #endif |
| 352 | } |
| 353 | |
| 354 | char* SkString::writable_str() |
| 355 | { |
| 356 | this->validate(); |
| 357 | |
| 358 | if (fRec->fLength) |
| 359 | { |
| 360 | if (fRec->fRefCnt > 1) |
| 361 | { |
| 362 | fRec->fRefCnt -= 1; |
| 363 | fRec = AllocRec(fRec->data(), fRec->fLength); |
| 364 | #ifdef SK_DEBUG |
| 365 | fStr = fRec->data(); |
| 366 | #endif |
| 367 | } |
| 368 | } |
| 369 | return fRec->data(); |
| 370 | } |
| 371 | |
| 372 | void SkString::set(const char text[]) |
| 373 | { |
| 374 | this->set(text, text ? strlen(text) : 0); |
| 375 | } |
| 376 | |
| 377 | void SkString::set(const char text[], size_t len) |
| 378 | { |
| 379 | if (len == 0) |
| 380 | this->reset(); |
| 381 | else if (fRec->fRefCnt == 1 && len <= fRec->fLength) // should we resize if len <<<< fLength, to save RAM? (e.g. len < (fLength>>1)) |
| 382 | { |
| 383 | // just use less of the buffer without allocating a smaller one |
| 384 | char* p = this->writable_str(); |
| 385 | if (text) |
| 386 | memcpy(p, text, len); |
| 387 | p[len] = 0; |
| 388 | fRec->fLength = SkToU16(len); |
| 389 | } |
| 390 | else if (fRec->fRefCnt == 1 && ((unsigned)fRec->fLength >> 2) == (len >> 2)) |
| 391 | { |
| 392 | // we have spare room in the current allocation, so don't alloc a larger one |
| 393 | char* p = this->writable_str(); |
| 394 | if (text) |
| 395 | memcpy(p, text, len); |
| 396 | p[len] = 0; |
| 397 | fRec->fLength = SkToU16(len); |
| 398 | } |
| 399 | else |
| 400 | { |
| 401 | SkString tmp(text, len); |
| 402 | this->swap(tmp); |
| 403 | } |
| 404 | } |
| 405 | |
| 406 | void SkString::setUTF16(const uint16_t src[]) |
| 407 | { |
| 408 | int count = 0; |
| 409 | |
| 410 | while (src[count]) |
| 411 | count += 1; |
| 412 | setUTF16(src, count); |
| 413 | } |
| 414 | |
| 415 | void SkString::setUTF16(const uint16_t src[], size_t count) |
| 416 | { |
| 417 | if (count == 0) |
| 418 | this->reset(); |
| 419 | else if (count <= fRec->fLength) // should we resize if len <<<< fLength, to save RAM? (e.g. len < (fLength>>1)) |
| 420 | { |
| 421 | if (count < fRec->fLength) |
| 422 | this->resize(count); |
| 423 | char* p = this->writable_str(); |
| 424 | for (size_t i = 0; i < count; i++) |
| 425 | p[i] = SkToU8(src[i]); |
| 426 | p[count] = 0; |
| 427 | } |
| 428 | else |
| 429 | { |
| 430 | SkString tmp(count); // puts a null terminator at the end of the string |
| 431 | char* p = tmp.writable_str(); |
| 432 | |
| 433 | for (size_t i = 0; i < count; i++) |
| 434 | p[i] = SkToU8(src[i]); |
| 435 | |
| 436 | this->swap(tmp); |
| 437 | } |
| 438 | } |
| 439 | |
| 440 | void SkString::insert(size_t offset, const char text[]) |
| 441 | { |
| 442 | this->insert(offset, text, text ? strlen(text) : 0); |
| 443 | } |
| 444 | |
| 445 | void SkString::insert(size_t offset, const char text[], size_t len) |
| 446 | { |
| 447 | if (len) |
| 448 | { |
| 449 | size_t length = fRec->fLength; |
| 450 | if (offset > length) |
| 451 | offset = length; |
| 452 | |
| 453 | /* If we're the only owner, and we have room in our allocation for the insert, |
| 454 | do it in place, rather than allocating a new buffer. |
| 455 | |
| 456 | To know we have room, compare the allocated sizes |
| 457 | beforeAlloc = SkAlign4(length + 1) |
| 458 | afterAlloc = SkAligh4(length + 1 + len) |
| 459 | but SkAlign4(x) is (x + 3) >> 2 << 2 |
| 460 | which is equivalent for testing to (length + 1 + 3) >> 2 == (length + 1 + 3 + len) >> 2 |
| 461 | and we can then eliminate the +1+3 since that doesn't affec the answer |
| 462 | */ |
| 463 | if (fRec->fRefCnt == 1 && (length >> 2) == ((length + len) >> 2)) |
| 464 | { |
| 465 | char* dst = this->writable_str(); |
| 466 | |
| 467 | if (offset < length) |
| 468 | memmove(dst + offset + len, dst + offset, length - offset); |
| 469 | memcpy(dst + offset, text, len); |
| 470 | |
| 471 | dst[length + len] = 0; |
| 472 | fRec->fLength = SkToU16(length + len); |
| 473 | } |
| 474 | else |
| 475 | { |
| 476 | /* Seems we should use realloc here, since that is safe if it fails |
| 477 | (we have the original data), and might be faster than alloc/copy/free. |
| 478 | */ |
| 479 | SkString tmp(fRec->fLength + len); |
| 480 | char* dst = tmp.writable_str(); |
| 481 | |
| 482 | if (offset > 0) |
| 483 | memcpy(dst, fRec->data(), offset); |
| 484 | memcpy(dst + offset, text, len); |
| 485 | if (offset < fRec->fLength) |
| 486 | memcpy(dst + offset + len, fRec->data() + offset, fRec->fLength - offset); |
| 487 | |
| 488 | this->swap(tmp); |
| 489 | } |
| 490 | } |
| 491 | } |
| 492 | |
| 493 | void SkString::insertUnichar(size_t offset, SkUnichar uni) |
| 494 | { |
| 495 | char buffer[kMaxBytesInUTF8Sequence]; |
| 496 | size_t len = SkUTF8_FromUnichar(uni, buffer); |
| 497 | |
| 498 | if (len) |
| 499 | this->insert(offset, buffer, len); |
| 500 | } |
| 501 | |
| 502 | void SkString::insertS32(size_t offset, int32_t dec) |
| 503 | { |
| 504 | char buffer[SkStrAppendS32_MaxSize]; |
| 505 | char* stop = SkStrAppendS32(buffer, dec); |
| 506 | this->insert(offset, buffer, stop - buffer); |
| 507 | } |
| 508 | |
vandebo@chromium.org | d877fdb | 2010-10-12 23:08:13 +0000 | [diff] [blame] | 509 | void SkString::insertS64(size_t offset, int64_t dec, int minDigits) |
| 510 | { |
| 511 | char buffer[SkStrAppendS64_MaxSize]; |
| 512 | char* stop = SkStrAppendS64(buffer, dec, minDigits); |
| 513 | this->insert(offset, buffer, stop - buffer); |
| 514 | } |
| 515 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 516 | void SkString::insertHex(size_t offset, uint32_t hex, int minDigits) |
| 517 | { |
| 518 | minDigits = SkPin32(minDigits, 0, 8); |
reed@google.com | fa06e52 | 2011-02-28 21:29:58 +0000 | [diff] [blame] | 519 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 520 | static const char gHex[] = "0123456789ABCDEF"; |
| 521 | |
| 522 | char buffer[8]; |
| 523 | char* p = buffer + sizeof(buffer); |
| 524 | |
| 525 | do { |
| 526 | *--p = gHex[hex & 0xF]; |
| 527 | hex >>= 4; |
| 528 | minDigits -= 1; |
| 529 | } while (hex != 0); |
| 530 | while (--minDigits >= 0) |
| 531 | *--p = '0'; |
| 532 | |
| 533 | SkASSERT(p >= buffer); |
| 534 | this->insert(offset, p, buffer + sizeof(buffer) - p); |
| 535 | } |
| 536 | |
| 537 | void SkString::insertScalar(size_t offset, SkScalar value) |
| 538 | { |
| 539 | char buffer[SkStrAppendScalar_MaxSize]; |
| 540 | char* stop = SkStrAppendScalar(buffer, value); |
| 541 | this->insert(offset, buffer, stop - buffer); |
| 542 | } |
| 543 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 544 | void SkString::printf(const char format[], ...) { |
| 545 | char buffer[kBufferSize]; |
| 546 | ARGS_TO_BUFFER(format, buffer, kBufferSize); |
| 547 | |
| 548 | this->set(buffer, strlen(buffer)); |
| 549 | } |
| 550 | |
| 551 | void SkString::appendf(const char format[], ...) { |
| 552 | char buffer[kBufferSize]; |
| 553 | ARGS_TO_BUFFER(format, buffer, kBufferSize); |
reed@google.com | fa06e52 | 2011-02-28 21:29:58 +0000 | [diff] [blame] | 554 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 555 | this->append(buffer, strlen(buffer)); |
| 556 | } |
| 557 | |
| 558 | void SkString::prependf(const char format[], ...) { |
| 559 | char buffer[kBufferSize]; |
| 560 | ARGS_TO_BUFFER(format, buffer, kBufferSize); |
reed@google.com | fa06e52 | 2011-02-28 21:29:58 +0000 | [diff] [blame] | 561 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 562 | this->prepend(buffer, strlen(buffer)); |
| 563 | } |
| 564 | |
| 565 | #undef VSNPRINTF |
| 566 | |
reed@google.com | fa06e52 | 2011-02-28 21:29:58 +0000 | [diff] [blame] | 567 | /////////////////////////////////////////////////////////////////////////////// |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 568 | |
| 569 | void SkString::remove(size_t offset, size_t length) |
| 570 | { |
| 571 | size_t size = this->size(); |
| 572 | |
| 573 | if (offset < size) |
| 574 | { |
| 575 | if (offset + length > size) |
| 576 | length = size - offset; |
| 577 | if (length > 0) |
| 578 | { |
| 579 | SkASSERT(size > length); |
| 580 | SkString tmp(size - length); |
| 581 | char* dst = tmp.writable_str(); |
| 582 | const char* src = this->c_str(); |
| 583 | |
| 584 | if (offset) |
| 585 | { |
| 586 | SkASSERT(offset <= tmp.size()); |
| 587 | memcpy(dst, src, offset); |
| 588 | } |
| 589 | size_t tail = size - offset - length; |
| 590 | SkASSERT((int32_t)tail >= 0); |
| 591 | if (tail) |
| 592 | { |
| 593 | // SkASSERT(offset + length <= tmp.size()); |
| 594 | memcpy(dst + offset, src + offset + length, tail); |
| 595 | } |
| 596 | SkASSERT(dst[tmp.size()] == 0); |
| 597 | this->swap(tmp); |
| 598 | } |
| 599 | } |
| 600 | } |
| 601 | |
| 602 | void SkString::swap(SkString& other) |
| 603 | { |
| 604 | this->validate(); |
| 605 | other.validate(); |
| 606 | |
| 607 | SkTSwap<Rec*>(fRec, other.fRec); |
| 608 | #ifdef SK_DEBUG |
| 609 | SkTSwap<const char*>(fStr, other.fStr); |
| 610 | #endif |
| 611 | } |
| 612 | |
| 613 | ///////////////////////////////////////////////////////////////////////////////// |
| 614 | |
| 615 | SkAutoUCS2::SkAutoUCS2(const char utf8[]) |
| 616 | { |
| 617 | size_t len = strlen(utf8); |
| 618 | fUCS2 = (uint16_t*)sk_malloc_throw((len + 1) * sizeof(uint16_t)); |
| 619 | |
| 620 | uint16_t* dst = fUCS2; |
| 621 | for (;;) |
| 622 | { |
| 623 | SkUnichar uni = SkUTF8_NextUnichar(&utf8); |
| 624 | *dst++ = SkToU16(uni); |
| 625 | if (uni == 0) |
| 626 | break; |
| 627 | } |
| 628 | fCount = (int)(dst - fUCS2); |
| 629 | } |
| 630 | |
| 631 | SkAutoUCS2::~SkAutoUCS2() |
| 632 | { |
| 633 | delete[] fUCS2; |
| 634 | } |