epoger@google.com | ec3ed6a | 2011-07-28 14:26:00 +0000 | [diff] [blame] | 1 | |
| 2 | /* |
| 3 | * Copyright 2006 The Android Open Source Project |
| 4 | * |
| 5 | * Use of this source code is governed by a BSD-style license that can be |
| 6 | * found in the LICENSE file. |
| 7 | */ |
| 8 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 9 | |
| 10 | #include "SkStream.h" |
reed@google.com | 8d0b577 | 2011-06-24 13:07:31 +0000 | [diff] [blame] | 11 | #include "SkData.h" |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 12 | #include "SkFixed.h" |
| 13 | #include "SkString.h" |
| 14 | #include "SkOSFile.h" |
| 15 | |
| 16 | SkStream::~SkStream() {} |
| 17 | |
| 18 | const char* SkStream::getFileName() |
| 19 | { |
| 20 | // override in subclass if you represent a file |
| 21 | return NULL; |
| 22 | } |
| 23 | |
| 24 | const void* SkStream::getMemoryBase() |
| 25 | { |
| 26 | // override in subclass if you represent a memory block |
| 27 | return NULL; |
| 28 | } |
| 29 | |
| 30 | size_t SkStream::skip(size_t size) |
| 31 | { |
| 32 | /* Check for size == 0, and just return 0. If we passed that |
| 33 | to read(), it would interpret it as a request for the entire |
| 34 | size of the stream. |
| 35 | */ |
| 36 | return size ? this->read(NULL, size) : 0; |
| 37 | } |
| 38 | |
| 39 | int8_t SkStream::readS8() { |
| 40 | int8_t value; |
reed@android.com | 04225dc | 2009-03-20 04:59:37 +0000 | [diff] [blame] | 41 | SkDEBUGCODE(size_t len =) this->read(&value, 1); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 42 | SkASSERT(1 == len); |
| 43 | return value; |
| 44 | } |
| 45 | |
| 46 | int16_t SkStream::readS16() { |
| 47 | int16_t value; |
reed@android.com | 04225dc | 2009-03-20 04:59:37 +0000 | [diff] [blame] | 48 | SkDEBUGCODE(size_t len =) this->read(&value, 2); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 49 | SkASSERT(2 == len); |
| 50 | return value; |
| 51 | } |
| 52 | |
| 53 | int32_t SkStream::readS32() { |
| 54 | int32_t value; |
reed@android.com | 04225dc | 2009-03-20 04:59:37 +0000 | [diff] [blame] | 55 | SkDEBUGCODE(size_t len =) this->read(&value, 4); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 56 | SkASSERT(4 == len); |
| 57 | return value; |
| 58 | } |
| 59 | |
| 60 | SkScalar SkStream::readScalar() { |
| 61 | SkScalar value; |
reed@android.com | 04225dc | 2009-03-20 04:59:37 +0000 | [diff] [blame] | 62 | SkDEBUGCODE(size_t len =) this->read(&value, sizeof(SkScalar)); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 63 | SkASSERT(sizeof(SkScalar) == len); |
| 64 | return value; |
| 65 | } |
| 66 | |
reed@google.com | 19f286b | 2011-10-18 11:49:52 +0000 | [diff] [blame] | 67 | #define SK_MAX_BYTE_FOR_U8 0xFD |
| 68 | #define SK_BYTE_SENTINEL_FOR_U16 0xFE |
| 69 | #define SK_BYTE_SENTINEL_FOR_U32 0xFF |
| 70 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 71 | size_t SkStream::readPackedUInt() { |
| 72 | uint8_t byte; |
| 73 | if (!this->read(&byte, 1)) { |
| 74 | return 0; |
| 75 | } |
reed@google.com | 19f286b | 2011-10-18 11:49:52 +0000 | [diff] [blame] | 76 | if (SK_BYTE_SENTINEL_FOR_U16 == byte) { |
| 77 | return this->readU16(); |
| 78 | } else if (SK_BYTE_SENTINEL_FOR_U32 == byte) { |
| 79 | return this->readU32(); |
| 80 | } else { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 81 | return byte; |
| 82 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 83 | } |
| 84 | |
| 85 | ////////////////////////////////////////////////////////////////////////////////////// |
| 86 | |
| 87 | SkWStream::~SkWStream() |
| 88 | { |
| 89 | } |
| 90 | |
| 91 | void SkWStream::newline() |
| 92 | { |
| 93 | this->write("\n", 1); |
| 94 | } |
| 95 | |
| 96 | void SkWStream::flush() |
| 97 | { |
| 98 | } |
| 99 | |
| 100 | bool SkWStream::writeText(const char text[]) |
| 101 | { |
| 102 | SkASSERT(text); |
| 103 | return this->write(text, strlen(text)); |
| 104 | } |
| 105 | |
| 106 | bool SkWStream::writeDecAsText(int32_t dec) |
| 107 | { |
| 108 | SkString tmp; |
| 109 | tmp.appendS32(dec); |
| 110 | return this->write(tmp.c_str(), tmp.size()); |
| 111 | } |
| 112 | |
vandebo@chromium.org | d877fdb | 2010-10-12 23:08:13 +0000 | [diff] [blame] | 113 | bool SkWStream::writeBigDecAsText(int64_t dec, int minDigits) |
| 114 | { |
| 115 | SkString tmp; |
| 116 | tmp.appendS64(dec, minDigits); |
| 117 | return this->write(tmp.c_str(), tmp.size()); |
| 118 | } |
| 119 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 120 | bool SkWStream::writeHexAsText(uint32_t hex, int digits) |
| 121 | { |
| 122 | SkString tmp; |
| 123 | tmp.appendHex(hex, digits); |
| 124 | return this->write(tmp.c_str(), tmp.size()); |
| 125 | } |
| 126 | |
| 127 | bool SkWStream::writeScalarAsText(SkScalar value) |
| 128 | { |
| 129 | SkString tmp; |
| 130 | tmp.appendScalar(value); |
| 131 | return this->write(tmp.c_str(), tmp.size()); |
| 132 | } |
| 133 | |
| 134 | bool SkWStream::write8(U8CPU value) { |
| 135 | uint8_t v = SkToU8(value); |
| 136 | return this->write(&v, 1); |
| 137 | } |
| 138 | |
| 139 | bool SkWStream::write16(U16CPU value) { |
| 140 | uint16_t v = SkToU16(value); |
| 141 | return this->write(&v, 2); |
| 142 | } |
| 143 | |
| 144 | bool SkWStream::write32(uint32_t value) { |
| 145 | return this->write(&value, 4); |
| 146 | } |
| 147 | |
| 148 | bool SkWStream::writeScalar(SkScalar value) { |
| 149 | return this->write(&value, sizeof(value)); |
| 150 | } |
| 151 | |
| 152 | bool SkWStream::writePackedUInt(size_t value) { |
reed@google.com | 19f286b | 2011-10-18 11:49:52 +0000 | [diff] [blame] | 153 | uint8_t data[5]; |
| 154 | size_t len = 1; |
| 155 | if (value <= SK_MAX_BYTE_FOR_U8) { |
| 156 | data[0] = value; |
| 157 | len = 1; |
| 158 | } else if (value <= 0xFFFF) { |
| 159 | uint16_t value16 = value; |
| 160 | data[0] = SK_BYTE_SENTINEL_FOR_U16; |
| 161 | memcpy(&data[1], &value16, 2); |
| 162 | len = 3; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 163 | } else { |
reed@google.com | 19f286b | 2011-10-18 11:49:52 +0000 | [diff] [blame] | 164 | uint32_t value32 = value; |
| 165 | data[0] = SK_BYTE_SENTINEL_FOR_U32; |
| 166 | memcpy(&data[1], &value32, 4); |
| 167 | len = 5; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 168 | } |
reed@google.com | 19f286b | 2011-10-18 11:49:52 +0000 | [diff] [blame] | 169 | return this->write(data, len); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 170 | } |
| 171 | |
| 172 | bool SkWStream::writeStream(SkStream* stream, size_t length) { |
| 173 | char scratch[1024]; |
| 174 | const size_t MAX = sizeof(scratch); |
| 175 | |
| 176 | while (length != 0) { |
| 177 | size_t n = length; |
| 178 | if (n > MAX) { |
| 179 | n = MAX; |
| 180 | } |
| 181 | stream->read(scratch, n); |
| 182 | if (!this->write(scratch, n)) { |
| 183 | return false; |
| 184 | } |
| 185 | length -= n; |
| 186 | } |
| 187 | return true; |
| 188 | } |
| 189 | |
reed@google.com | 8a85d0c | 2011-06-24 19:12:12 +0000 | [diff] [blame] | 190 | bool SkWStream::writeData(const SkData* data) { |
| 191 | if (data) { |
| 192 | this->write(data->data(), data->size()); |
| 193 | } |
| 194 | return true; |
| 195 | } |
| 196 | |
| 197 | /////////////////////////////////////////////////////////////////////////////// |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 198 | |
| 199 | SkFILEStream::SkFILEStream(const char file[]) : fName(file) |
| 200 | { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 201 | fFILE = file ? sk_fopen(fName.c_str(), kRead_SkFILE_Flag) : NULL; |
| 202 | } |
| 203 | |
| 204 | SkFILEStream::~SkFILEStream() |
| 205 | { |
| 206 | if (fFILE) |
| 207 | sk_fclose(fFILE); |
| 208 | } |
| 209 | |
| 210 | void SkFILEStream::setPath(const char path[]) |
| 211 | { |
| 212 | fName.set(path); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 213 | if (fFILE) |
| 214 | { |
| 215 | sk_fclose(fFILE); |
| 216 | fFILE = NULL; |
| 217 | } |
| 218 | if (path) |
| 219 | fFILE = sk_fopen(fName.c_str(), kRead_SkFILE_Flag); |
| 220 | } |
| 221 | |
| 222 | const char* SkFILEStream::getFileName() |
| 223 | { |
| 224 | return fName.c_str(); |
| 225 | } |
| 226 | |
| 227 | bool SkFILEStream::rewind() |
| 228 | { |
| 229 | if (fFILE) |
| 230 | { |
| 231 | if (sk_frewind(fFILE)) |
| 232 | return true; |
| 233 | // we hit an error |
| 234 | sk_fclose(fFILE); |
| 235 | fFILE = NULL; |
| 236 | } |
| 237 | return false; |
| 238 | } |
| 239 | |
| 240 | size_t SkFILEStream::read(void* buffer, size_t size) |
| 241 | { |
| 242 | if (fFILE) |
| 243 | { |
| 244 | if (buffer == NULL && size == 0) // special signature, they want the total size |
| 245 | return sk_fgetsize(fFILE); |
| 246 | else |
| 247 | return sk_fread(buffer, size, fFILE); |
| 248 | } |
| 249 | return 0; |
| 250 | } |
| 251 | |
reed@google.com | 8a85d0c | 2011-06-24 19:12:12 +0000 | [diff] [blame] | 252 | /////////////////////////////////////////////////////////////////////////////// |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 253 | |
reed@google.com | 67d0cff | 2011-06-24 20:06:36 +0000 | [diff] [blame] | 254 | static SkData* newFromParams(const void* src, size_t size, bool copyData) { |
| 255 | if (copyData) { |
| 256 | return SkData::NewWithCopy(src, size); |
| 257 | } else { |
| 258 | return SkData::NewWithProc(src, size, NULL, NULL); |
| 259 | } |
| 260 | } |
| 261 | |
reed@google.com | 8a85d0c | 2011-06-24 19:12:12 +0000 | [diff] [blame] | 262 | SkMemoryStream::SkMemoryStream() { |
| 263 | fData = SkData::NewEmpty(); |
| 264 | fOffset = 0; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 265 | } |
| 266 | |
| 267 | SkMemoryStream::SkMemoryStream(size_t size) { |
reed@google.com | 8a85d0c | 2011-06-24 19:12:12 +0000 | [diff] [blame] | 268 | fData = SkData::NewFromMalloc(sk_malloc_throw(size), size); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 269 | fOffset = 0; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 270 | } |
| 271 | |
reed@google.com | 8a85d0c | 2011-06-24 19:12:12 +0000 | [diff] [blame] | 272 | SkMemoryStream::SkMemoryStream(const void* src, size_t size, bool copyData) { |
reed@google.com | 67d0cff | 2011-06-24 20:06:36 +0000 | [diff] [blame] | 273 | fData = newFromParams(src, size, copyData); |
reed@google.com | 8a85d0c | 2011-06-24 19:12:12 +0000 | [diff] [blame] | 274 | fOffset = 0; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 275 | } |
| 276 | |
reed@google.com | 8a85d0c | 2011-06-24 19:12:12 +0000 | [diff] [blame] | 277 | SkMemoryStream::~SkMemoryStream() { |
| 278 | fData->unref(); |
| 279 | } |
| 280 | |
| 281 | void SkMemoryStream::setMemoryOwned(const void* src, size_t size) { |
| 282 | fData->unref(); |
| 283 | fData = SkData::NewFromMalloc(src, size); |
| 284 | fOffset = 0; |
| 285 | } |
| 286 | |
| 287 | void SkMemoryStream::setMemory(const void* src, size_t size, bool copyData) { |
| 288 | fData->unref(); |
reed@google.com | 67d0cff | 2011-06-24 20:06:36 +0000 | [diff] [blame] | 289 | fData = newFromParams(src, size, copyData); |
reed@google.com | 8a85d0c | 2011-06-24 19:12:12 +0000 | [diff] [blame] | 290 | fOffset = 0; |
| 291 | } |
| 292 | |
| 293 | SkData* SkMemoryStream::copyToData() const { |
| 294 | fData->ref(); |
| 295 | return fData; |
| 296 | } |
| 297 | |
| 298 | SkData* SkMemoryStream::setData(SkData* data) { |
| 299 | SkRefCnt_SafeAssign(fData, data); |
| 300 | return data; |
| 301 | } |
| 302 | |
| 303 | void SkMemoryStream::skipToAlign4() { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 304 | // cast to remove unary-minus warning |
| 305 | fOffset += -(int)fOffset & 0x03; |
| 306 | } |
| 307 | |
reed@google.com | 8a85d0c | 2011-06-24 19:12:12 +0000 | [diff] [blame] | 308 | bool SkMemoryStream::rewind() { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 309 | fOffset = 0; |
| 310 | return true; |
| 311 | } |
| 312 | |
reed@google.com | 8a85d0c | 2011-06-24 19:12:12 +0000 | [diff] [blame] | 313 | size_t SkMemoryStream::read(void* buffer, size_t size) { |
| 314 | size_t dataSize = fData->size(); |
| 315 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 316 | if (buffer == NULL && size == 0) // special signature, they want the total size |
reed@google.com | 8a85d0c | 2011-06-24 19:12:12 +0000 | [diff] [blame] | 317 | return dataSize; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 318 | |
| 319 | // if buffer is NULL, seek ahead by size |
| 320 | |
reed@google.com | 8a85d0c | 2011-06-24 19:12:12 +0000 | [diff] [blame] | 321 | if (size == 0) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 322 | return 0; |
reed@google.com | 8a85d0c | 2011-06-24 19:12:12 +0000 | [diff] [blame] | 323 | } |
| 324 | if (size > dataSize - fOffset) { |
| 325 | size = dataSize - fOffset; |
| 326 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 327 | if (buffer) { |
reed@google.com | 8a85d0c | 2011-06-24 19:12:12 +0000 | [diff] [blame] | 328 | memcpy(buffer, fData->bytes() + fOffset, size); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 329 | } |
| 330 | fOffset += size; |
| 331 | return size; |
| 332 | } |
| 333 | |
reed@google.com | 8a85d0c | 2011-06-24 19:12:12 +0000 | [diff] [blame] | 334 | const void* SkMemoryStream::getMemoryBase() { |
| 335 | return fData->data(); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 336 | } |
| 337 | |
reed@google.com | 8a85d0c | 2011-06-24 19:12:12 +0000 | [diff] [blame] | 338 | const void* SkMemoryStream::getAtPos() { |
| 339 | return fData->bytes() + fOffset; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 340 | } |
| 341 | |
reed@google.com | 8a85d0c | 2011-06-24 19:12:12 +0000 | [diff] [blame] | 342 | size_t SkMemoryStream::seek(size_t offset) { |
| 343 | if (offset > fData->size()) { |
| 344 | offset = fData->size(); |
| 345 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 346 | fOffset = offset; |
| 347 | return offset; |
| 348 | } |
| 349 | |
reed@google.com | 8a85d0c | 2011-06-24 19:12:12 +0000 | [diff] [blame] | 350 | /////////////////////////////////////////////////////////////////////////////// |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 351 | |
| 352 | SkBufferStream::SkBufferStream(SkStream* proxy, size_t bufferSize) |
| 353 | : fProxy(proxy) |
| 354 | { |
| 355 | SkASSERT(proxy != NULL); |
| 356 | proxy->ref(); |
| 357 | this->init(NULL, bufferSize); |
| 358 | } |
| 359 | |
| 360 | SkBufferStream::SkBufferStream(SkStream* proxy, void* buffer, size_t bufferSize) |
| 361 | : fProxy(proxy) |
| 362 | { |
| 363 | SkASSERT(proxy != NULL); |
| 364 | SkASSERT(buffer == NULL || bufferSize != 0); // init(addr, 0) makes no sense, we must know how big their buffer is |
| 365 | proxy->ref(); |
| 366 | this->init(buffer, bufferSize); |
| 367 | } |
| 368 | |
| 369 | void SkBufferStream::init(void* buffer, size_t bufferSize) |
| 370 | { |
| 371 | if (bufferSize == 0) |
| 372 | bufferSize = kDefaultBufferSize; |
| 373 | |
| 374 | fOrigBufferSize = bufferSize; |
| 375 | fBufferSize = bufferSize; |
| 376 | fBufferOffset = bufferSize; // to trigger a reload on the first read() |
| 377 | |
| 378 | if (buffer == NULL) |
| 379 | { |
| 380 | fBuffer = (char*)sk_malloc_throw(fBufferSize); |
| 381 | fWeOwnTheBuffer = true; |
| 382 | } |
| 383 | else |
| 384 | { |
| 385 | fBuffer = (char*)buffer; |
| 386 | fWeOwnTheBuffer = false; |
| 387 | } |
| 388 | } |
| 389 | |
| 390 | SkBufferStream::~SkBufferStream() |
| 391 | { |
| 392 | fProxy->unref(); |
| 393 | if (fWeOwnTheBuffer) |
| 394 | sk_free(fBuffer); |
| 395 | } |
| 396 | |
| 397 | bool SkBufferStream::rewind() |
| 398 | { |
| 399 | fBufferOffset = fBufferSize = fOrigBufferSize; |
| 400 | return fProxy->rewind(); |
| 401 | } |
| 402 | |
| 403 | const char* SkBufferStream::getFileName() |
| 404 | { |
| 405 | return fProxy->getFileName(); |
| 406 | } |
| 407 | |
| 408 | #ifdef SK_DEBUG |
| 409 | // #define SK_TRACE_BUFFERSTREAM |
| 410 | #endif |
| 411 | |
| 412 | size_t SkBufferStream::read(void* buffer, size_t size) { |
| 413 | #ifdef SK_TRACE_BUFFERSTREAM |
| 414 | SkDebugf("Request %d", size); |
| 415 | #endif |
| 416 | |
| 417 | if (buffer == NULL && size == 0) { |
| 418 | return fProxy->read(buffer, size); // requesting total size |
| 419 | } |
| 420 | |
| 421 | if (0 == size) { |
| 422 | return 0; |
| 423 | } |
| 424 | |
| 425 | // skip size bytes |
| 426 | if (NULL == buffer) { |
| 427 | size_t remaining = fBufferSize - fBufferOffset; |
| 428 | if (remaining >= size) { |
| 429 | fBufferOffset += size; |
| 430 | return size; |
| 431 | } |
| 432 | // if we get here, we are being asked to skip beyond our current buffer |
| 433 | // so reset our offset to force a read next time, and skip the diff |
| 434 | // in our proxy |
| 435 | fBufferOffset = fOrigBufferSize; |
| 436 | return remaining + fProxy->read(NULL, size - remaining); |
| 437 | } |
| 438 | |
| 439 | size_t s = size; |
| 440 | size_t actuallyRead = 0; |
| 441 | |
| 442 | // flush what we can from our fBuffer |
| 443 | if (fBufferOffset < fBufferSize) |
| 444 | { |
| 445 | if (s > fBufferSize - fBufferOffset) |
| 446 | s = fBufferSize - fBufferOffset; |
| 447 | memcpy(buffer, fBuffer + fBufferOffset, s); |
| 448 | #ifdef SK_TRACE_BUFFERSTREAM |
| 449 | SkDebugf(" flush %d", s); |
| 450 | #endif |
| 451 | size -= s; |
| 452 | fBufferOffset += s; |
| 453 | buffer = (char*)buffer + s; |
| 454 | actuallyRead = s; |
| 455 | } |
| 456 | |
| 457 | // check if there is more to read |
| 458 | if (size) |
| 459 | { |
| 460 | SkASSERT(fBufferOffset >= fBufferSize); // need to refill our fBuffer |
| 461 | |
| 462 | if (size < fBufferSize) // lets try to read more than the request |
| 463 | { |
| 464 | s = fProxy->read(fBuffer, fBufferSize); |
| 465 | #ifdef SK_TRACE_BUFFERSTREAM |
| 466 | SkDebugf(" read %d into fBuffer", s); |
| 467 | #endif |
| 468 | if (size > s) // they asked for too much |
| 469 | size = s; |
| 470 | if (size) |
| 471 | { |
| 472 | memcpy(buffer, fBuffer, size); |
| 473 | actuallyRead += size; |
| 474 | #ifdef SK_TRACE_BUFFERSTREAM |
| 475 | SkDebugf(" memcpy %d into dst", size); |
| 476 | #endif |
| 477 | } |
| 478 | |
| 479 | fBufferOffset = size; |
| 480 | fBufferSize = s; // record the (possibly smaller) size for the buffer |
| 481 | } |
| 482 | else // just do a direct read |
| 483 | { |
| 484 | actuallyRead += fProxy->read(buffer, size); |
| 485 | #ifdef SK_TRACE_BUFFERSTREAM |
| 486 | SkDebugf(" direct read %d", size); |
| 487 | #endif |
| 488 | } |
| 489 | } |
| 490 | #ifdef SK_TRACE_BUFFERSTREAM |
| 491 | SkDebugf("\n"); |
| 492 | #endif |
| 493 | return actuallyRead; |
| 494 | } |
| 495 | |
| 496 | const void* SkBufferStream::getMemoryBase() |
| 497 | { |
| 498 | return fProxy->getMemoryBase(); |
| 499 | } |
| 500 | |
| 501 | ///////////////////////////////////////////////////////////////////////////////////////////////////////// |
| 502 | ///////////////////////////////////////////////////////////////////////////////////////////////////////// |
| 503 | |
| 504 | SkFILEWStream::SkFILEWStream(const char path[]) |
| 505 | { |
| 506 | fFILE = sk_fopen(path, kWrite_SkFILE_Flag); |
| 507 | } |
| 508 | |
| 509 | SkFILEWStream::~SkFILEWStream() |
| 510 | { |
| 511 | if (fFILE) |
| 512 | sk_fclose(fFILE); |
| 513 | } |
| 514 | |
| 515 | bool SkFILEWStream::write(const void* buffer, size_t size) |
| 516 | { |
| 517 | if (fFILE == NULL) |
| 518 | return false; |
| 519 | |
| 520 | if (sk_fwrite(buffer, size, fFILE) != size) |
| 521 | { |
| 522 | SkDEBUGCODE(SkDebugf("SkFILEWStream failed writing %d bytes\n", size);) |
| 523 | sk_fclose(fFILE); |
| 524 | fFILE = NULL; |
| 525 | return false; |
| 526 | } |
| 527 | return true; |
| 528 | } |
| 529 | |
| 530 | void SkFILEWStream::flush() |
| 531 | { |
| 532 | if (fFILE) |
| 533 | sk_fflush(fFILE); |
| 534 | } |
| 535 | |
| 536 | //////////////////////////////////////////////////////////////////////// |
| 537 | |
| 538 | SkMemoryWStream::SkMemoryWStream(void* buffer, size_t size) |
| 539 | : fBuffer((char*)buffer), fMaxLength(size), fBytesWritten(0) |
| 540 | { |
| 541 | } |
| 542 | |
| 543 | bool SkMemoryWStream::write(const void* buffer, size_t size) |
| 544 | { |
| 545 | size = SkMin32(size, fMaxLength - fBytesWritten); |
| 546 | if (size > 0) |
| 547 | { |
| 548 | memcpy(fBuffer + fBytesWritten, buffer, size); |
| 549 | fBytesWritten += size; |
| 550 | return true; |
| 551 | } |
| 552 | return false; |
| 553 | } |
| 554 | |
| 555 | //////////////////////////////////////////////////////////////////////// |
| 556 | |
| 557 | #define SkDynamicMemoryWStream_MinBlockSize 256 |
| 558 | |
| 559 | struct SkDynamicMemoryWStream::Block { |
| 560 | Block* fNext; |
| 561 | char* fCurr; |
| 562 | char* fStop; |
| 563 | |
| 564 | const char* start() const { return (const char*)(this + 1); } |
| 565 | char* start() { return (char*)(this + 1); } |
| 566 | size_t avail() const { return fStop - fCurr; } |
| 567 | size_t written() const { return fCurr - this->start(); } |
| 568 | |
| 569 | void init(size_t size) |
| 570 | { |
| 571 | fNext = NULL; |
| 572 | fCurr = this->start(); |
| 573 | fStop = this->start() + size; |
| 574 | } |
| 575 | |
| 576 | const void* append(const void* data, size_t size) |
| 577 | { |
| 578 | SkASSERT((size_t)(fStop - fCurr) >= size); |
| 579 | memcpy(fCurr, data, size); |
| 580 | fCurr += size; |
| 581 | return (const void*)((const char*)data + size); |
| 582 | } |
| 583 | }; |
| 584 | |
reed@google.com | 8a85d0c | 2011-06-24 19:12:12 +0000 | [diff] [blame] | 585 | SkDynamicMemoryWStream::SkDynamicMemoryWStream() |
| 586 | : fHead(NULL), fTail(NULL), fBytesWritten(0), fCopy(NULL) |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 587 | { |
| 588 | } |
| 589 | |
| 590 | SkDynamicMemoryWStream::~SkDynamicMemoryWStream() |
| 591 | { |
| 592 | reset(); |
| 593 | } |
| 594 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 595 | void SkDynamicMemoryWStream::reset() |
| 596 | { |
reed@google.com | 8a85d0c | 2011-06-24 19:12:12 +0000 | [diff] [blame] | 597 | this->invalidateCopy(); |
| 598 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 599 | Block* block = fHead; |
| 600 | |
| 601 | while (block != NULL) { |
| 602 | Block* next = block->fNext; |
| 603 | sk_free(block); |
| 604 | block = next; |
| 605 | } |
| 606 | fHead = fTail = NULL; |
| 607 | fBytesWritten = 0; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 608 | } |
| 609 | |
| 610 | bool SkDynamicMemoryWStream::write(const void* buffer, size_t count) |
| 611 | { |
| 612 | if (count > 0) { |
reed@google.com | 8a85d0c | 2011-06-24 19:12:12 +0000 | [diff] [blame] | 613 | this->invalidateCopy(); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 614 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 615 | fBytesWritten += count; |
| 616 | |
| 617 | size_t size; |
| 618 | |
| 619 | if (fTail != NULL && fTail->avail() > 0) { |
| 620 | size = SkMin32(fTail->avail(), count); |
| 621 | buffer = fTail->append(buffer, size); |
| 622 | SkASSERT(count >= size); |
| 623 | count -= size; |
| 624 | if (count == 0) |
| 625 | return true; |
| 626 | } |
| 627 | |
| 628 | size = SkMax32(count, SkDynamicMemoryWStream_MinBlockSize); |
| 629 | Block* block = (Block*)sk_malloc_throw(sizeof(Block) + size); |
| 630 | block->init(size); |
| 631 | block->append(buffer, count); |
| 632 | |
| 633 | if (fTail != NULL) |
| 634 | fTail->fNext = block; |
| 635 | else |
| 636 | fHead = fTail = block; |
| 637 | fTail = block; |
| 638 | } |
| 639 | return true; |
| 640 | } |
| 641 | |
| 642 | bool SkDynamicMemoryWStream::write(const void* buffer, size_t offset, size_t count) |
| 643 | { |
reed@google.com | 8a85d0c | 2011-06-24 19:12:12 +0000 | [diff] [blame] | 644 | if (offset + count > fBytesWritten) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 645 | return false; // test does not partially modify |
reed@google.com | 8a85d0c | 2011-06-24 19:12:12 +0000 | [diff] [blame] | 646 | } |
| 647 | |
| 648 | this->invalidateCopy(); |
| 649 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 650 | Block* block = fHead; |
| 651 | while (block != NULL) { |
| 652 | size_t size = block->written(); |
| 653 | if (offset < size) { |
| 654 | size_t part = offset + count > size ? size - offset : count; |
| 655 | memcpy(block->start() + offset, buffer, part); |
| 656 | if (count <= part) |
| 657 | return true; |
| 658 | count -= part; |
| 659 | buffer = (const void*) ((char* ) buffer + part); |
| 660 | } |
| 661 | offset = offset > size ? offset - size : 0; |
| 662 | block = block->fNext; |
| 663 | } |
| 664 | return false; |
| 665 | } |
| 666 | |
| 667 | bool SkDynamicMemoryWStream::read(void* buffer, size_t offset, size_t count) |
| 668 | { |
| 669 | if (offset + count > fBytesWritten) |
| 670 | return false; // test does not partially modify |
| 671 | Block* block = fHead; |
| 672 | while (block != NULL) { |
| 673 | size_t size = block->written(); |
| 674 | if (offset < size) { |
| 675 | size_t part = offset + count > size ? size - offset : count; |
| 676 | memcpy(buffer, block->start() + offset, part); |
| 677 | if (count <= part) |
| 678 | return true; |
| 679 | count -= part; |
| 680 | buffer = (void*) ((char* ) buffer + part); |
| 681 | } |
| 682 | offset = offset > size ? offset - size : 0; |
| 683 | block = block->fNext; |
| 684 | } |
| 685 | return false; |
| 686 | } |
| 687 | |
| 688 | void SkDynamicMemoryWStream::copyTo(void* dst) const |
| 689 | { |
reed@google.com | 8a85d0c | 2011-06-24 19:12:12 +0000 | [diff] [blame] | 690 | if (fCopy) { |
| 691 | memcpy(dst, fCopy->data(), fBytesWritten); |
| 692 | } else { |
| 693 | Block* block = fHead; |
| 694 | |
| 695 | while (block != NULL) { |
| 696 | size_t size = block->written(); |
| 697 | memcpy(dst, block->start(), size); |
| 698 | dst = (void*)((char*)dst + size); |
| 699 | block = block->fNext; |
| 700 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 701 | } |
| 702 | } |
| 703 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 704 | void SkDynamicMemoryWStream::padToAlign4() |
| 705 | { |
| 706 | // cast to remove unary-minus warning |
| 707 | int padBytes = -(int)fBytesWritten & 0x03; |
| 708 | if (padBytes == 0) |
| 709 | return; |
| 710 | int zero = 0; |
| 711 | write(&zero, padBytes); |
| 712 | } |
| 713 | |
reed@google.com | 8d0b577 | 2011-06-24 13:07:31 +0000 | [diff] [blame] | 714 | SkData* SkDynamicMemoryWStream::copyToData() const { |
reed@google.com | 8a85d0c | 2011-06-24 19:12:12 +0000 | [diff] [blame] | 715 | if (NULL == fCopy) { |
| 716 | void* buffer = sk_malloc_throw(fBytesWritten); |
| 717 | this->copyTo(buffer); |
| 718 | fCopy = SkData::NewFromMalloc(buffer, fBytesWritten); |
| 719 | } |
| 720 | fCopy->ref(); |
| 721 | return fCopy; |
reed@google.com | 70442a6 | 2011-06-23 21:48:04 +0000 | [diff] [blame] | 722 | } |
| 723 | |
reed@google.com | 8a85d0c | 2011-06-24 19:12:12 +0000 | [diff] [blame] | 724 | void SkDynamicMemoryWStream::invalidateCopy() { |
| 725 | if (fCopy) { |
| 726 | fCopy->unref(); |
| 727 | fCopy = NULL; |
| 728 | } |
| 729 | } |
| 730 | |
| 731 | /////////////////////////////////////////////////////////////////////////////// |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 732 | |
| 733 | void SkDebugWStream::newline() |
| 734 | { |
| 735 | #ifdef SK_DEBUG |
| 736 | SkDebugf("\n"); |
| 737 | #endif |
| 738 | } |
| 739 | |
| 740 | bool SkDebugWStream::write(const void* buffer, size_t size) |
| 741 | { |
| 742 | #ifdef SK_DEBUG |
| 743 | char* s = new char[size+1]; |
| 744 | memcpy(s, buffer, size); |
| 745 | s[size] = 0; |
| 746 | SkDebugf("%s", s); |
| 747 | delete[] s; |
| 748 | #endif |
| 749 | return true; |
| 750 | } |