| |
| /* |
| * Copyright 2006 The Android Open Source Project |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| |
| #include "SkStream.h" |
| #include "SkData.h" |
| #include "SkFixed.h" |
| #include "SkString.h" |
| #include "SkOSFile.h" |
| |
| SK_DEFINE_INST_COUNT(SkStream) |
| SK_DEFINE_INST_COUNT(SkWStream) |
| SK_DEFINE_INST_COUNT(SkFILEStream) |
| SK_DEFINE_INST_COUNT(SkMemoryStream) |
| SK_DEFINE_INST_COUNT(SkFILEWStream) |
| SK_DEFINE_INST_COUNT(SkMemoryWStream) |
| SK_DEFINE_INST_COUNT(SkDynamicMemoryWStream) |
| SK_DEFINE_INST_COUNT(SkDebugWStream) |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| |
| int8_t SkStream::readS8() { |
| int8_t value; |
| SkDEBUGCODE(size_t len =) this->read(&value, 1); |
| SkASSERT(1 == len); |
| return value; |
| } |
| |
| int16_t SkStream::readS16() { |
| int16_t value; |
| SkDEBUGCODE(size_t len =) this->read(&value, 2); |
| SkASSERT(2 == len); |
| return value; |
| } |
| |
| int32_t SkStream::readS32() { |
| int32_t value; |
| SkDEBUGCODE(size_t len =) this->read(&value, 4); |
| SkASSERT(4 == len); |
| return value; |
| } |
| |
| SkScalar SkStream::readScalar() { |
| SkScalar value; |
| SkDEBUGCODE(size_t len =) this->read(&value, sizeof(SkScalar)); |
| SkASSERT(sizeof(SkScalar) == len); |
| return value; |
| } |
| |
| #define SK_MAX_BYTE_FOR_U8 0xFD |
| #define SK_BYTE_SENTINEL_FOR_U16 0xFE |
| #define SK_BYTE_SENTINEL_FOR_U32 0xFF |
| |
| size_t SkStream::readPackedUInt() { |
| uint8_t byte; |
| if (!this->read(&byte, 1)) { |
| return 0; |
| } |
| if (SK_BYTE_SENTINEL_FOR_U16 == byte) { |
| return this->readU16(); |
| } else if (SK_BYTE_SENTINEL_FOR_U32 == byte) { |
| return this->readU32(); |
| } else { |
| return byte; |
| } |
| } |
| |
| SkData* SkStream::readData() { |
| size_t size = this->readU32(); |
| if (0 == size) { |
| return SkData::NewEmpty(); |
| } else { |
| void* buffer = sk_malloc_throw(size); |
| this->read(buffer, size); |
| return SkData::NewFromMalloc(buffer, size); |
| } |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////////////// |
| |
| SkWStream::~SkWStream() |
| { |
| } |
| |
| void SkWStream::newline() |
| { |
| this->write("\n", 1); |
| } |
| |
| void SkWStream::flush() |
| { |
| } |
| |
| bool SkWStream::writeText(const char text[]) |
| { |
| SkASSERT(text); |
| return this->write(text, strlen(text)); |
| } |
| |
| bool SkWStream::writeDecAsText(int32_t dec) |
| { |
| SkString tmp; |
| tmp.appendS32(dec); |
| return this->write(tmp.c_str(), tmp.size()); |
| } |
| |
| bool SkWStream::writeBigDecAsText(int64_t dec, int minDigits) |
| { |
| SkString tmp; |
| tmp.appendS64(dec, minDigits); |
| return this->write(tmp.c_str(), tmp.size()); |
| } |
| |
| bool SkWStream::writeHexAsText(uint32_t hex, int digits) |
| { |
| SkString tmp; |
| tmp.appendHex(hex, digits); |
| return this->write(tmp.c_str(), tmp.size()); |
| } |
| |
| bool SkWStream::writeScalarAsText(SkScalar value) |
| { |
| SkString tmp; |
| tmp.appendScalar(value); |
| return this->write(tmp.c_str(), tmp.size()); |
| } |
| |
| bool SkWStream::write8(U8CPU value) { |
| uint8_t v = SkToU8(value); |
| return this->write(&v, 1); |
| } |
| |
| bool SkWStream::write16(U16CPU value) { |
| uint16_t v = SkToU16(value); |
| return this->write(&v, 2); |
| } |
| |
| bool SkWStream::write32(uint32_t value) { |
| return this->write(&value, 4); |
| } |
| |
| bool SkWStream::writeScalar(SkScalar value) { |
| return this->write(&value, sizeof(value)); |
| } |
| |
| bool SkWStream::writePackedUInt(size_t value) { |
| uint8_t data[5]; |
| size_t len = 1; |
| if (value <= SK_MAX_BYTE_FOR_U8) { |
| data[0] = value; |
| len = 1; |
| } else if (value <= 0xFFFF) { |
| uint16_t value16 = value; |
| data[0] = SK_BYTE_SENTINEL_FOR_U16; |
| memcpy(&data[1], &value16, 2); |
| len = 3; |
| } else { |
| uint32_t value32 = value; |
| data[0] = SK_BYTE_SENTINEL_FOR_U32; |
| memcpy(&data[1], &value32, 4); |
| len = 5; |
| } |
| return this->write(data, len); |
| } |
| |
| bool SkWStream::writeStream(SkStream* stream, size_t length) { |
| char scratch[1024]; |
| const size_t MAX = sizeof(scratch); |
| |
| while (length != 0) { |
| size_t n = length; |
| if (n > MAX) { |
| n = MAX; |
| } |
| stream->read(scratch, n); |
| if (!this->write(scratch, n)) { |
| return false; |
| } |
| length -= n; |
| } |
| return true; |
| } |
| |
| bool SkWStream::writeData(const SkData* data) { |
| if (data) { |
| this->write32(data->size()); |
| this->write(data->data(), data->size()); |
| } else { |
| this->write32(0); |
| } |
| return true; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| SkFILEStream::SkFILEStream(const char file[]) : fName(file), fOwnership(kCallerPasses_Ownership) { |
| fFILE = file ? sk_fopen(fName.c_str(), kRead_SkFILE_Flag) : NULL; |
| } |
| |
| SkFILEStream::SkFILEStream(FILE* file, Ownership ownership) |
| : fFILE((SkFILE*)file) |
| , fOwnership(ownership) { |
| } |
| |
| SkFILEStream::~SkFILEStream() { |
| if (fFILE && fOwnership != kCallerRetains_Ownership) { |
| sk_fclose(fFILE); |
| } |
| } |
| |
| void SkFILEStream::setPath(const char path[]) { |
| fName.set(path); |
| if (fFILE) { |
| sk_fclose(fFILE); |
| fFILE = NULL; |
| } |
| if (path) { |
| fFILE = sk_fopen(fName.c_str(), kRead_SkFILE_Flag); |
| } |
| } |
| |
| size_t SkFILEStream::read(void* buffer, size_t size) { |
| if (fFILE) { |
| return sk_fread(buffer, size, fFILE); |
| } |
| return 0; |
| } |
| |
| bool SkFILEStream::isAtEnd() const { |
| return sk_feof(fFILE); |
| } |
| |
| bool SkFILEStream::rewind() { |
| if (fFILE) { |
| if (sk_frewind(fFILE)) { |
| return true; |
| } |
| // we hit an error |
| sk_fclose(fFILE); |
| fFILE = NULL; |
| } |
| return false; |
| } |
| |
| SkStreamAsset* SkFILEStream::duplicate() const { |
| if (NULL == fFILE) { |
| return new SkMemoryStream(); |
| } |
| |
| if (NULL != fData.get()) { |
| return new SkMemoryStream(fData); |
| } |
| |
| if (!fName.isEmpty()) { |
| SkAutoTUnref<SkFILEStream> that(new SkFILEStream(fName.c_str())); |
| if (sk_fidentical(that->fFILE, this->fFILE)) { |
| return that.detach(); |
| } |
| } |
| |
| fData.reset(SkData::NewFromFILE(fFILE)); |
| if (NULL == fData.get()) { |
| return NULL; |
| } |
| return new SkMemoryStream(fData); |
| } |
| |
| size_t SkFILEStream::getPosition() const { |
| return sk_ftell(fFILE); |
| } |
| |
| bool SkFILEStream::seek(size_t position) { |
| return sk_fseek(fFILE, position); |
| } |
| |
| bool SkFILEStream::move(long offset) { |
| return sk_fmove(fFILE, offset); |
| } |
| |
| SkStreamAsset* SkFILEStream::fork() const { |
| SkAutoTUnref<SkStreamAsset> that(this->duplicate()); |
| that->seek(this->getPosition()); |
| return that.detach(); |
| } |
| |
| size_t SkFILEStream::getLength() const { |
| return sk_fgetsize(fFILE); |
| } |
| |
| const void* SkFILEStream::getMemoryBase() { |
| if (NULL == fData.get()) { |
| return NULL; |
| } |
| return fData->data(); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| static SkData* newFromParams(const void* src, size_t size, bool copyData) { |
| if (copyData) { |
| return SkData::NewWithCopy(src, size); |
| } else { |
| return SkData::NewWithProc(src, size, NULL, NULL); |
| } |
| } |
| |
| SkMemoryStream::SkMemoryStream() { |
| fData = SkData::NewEmpty(); |
| fOffset = 0; |
| } |
| |
| SkMemoryStream::SkMemoryStream(size_t size) { |
| fData = SkData::NewFromMalloc(sk_malloc_throw(size), size); |
| fOffset = 0; |
| } |
| |
| SkMemoryStream::SkMemoryStream(const void* src, size_t size, bool copyData) { |
| fData = newFromParams(src, size, copyData); |
| fOffset = 0; |
| } |
| |
| SkMemoryStream::SkMemoryStream(SkData* data) { |
| if (NULL == data) { |
| fData = SkData::NewEmpty(); |
| } else { |
| fData = data; |
| fData->ref(); |
| } |
| fOffset = 0; |
| } |
| |
| SkMemoryStream::~SkMemoryStream() { |
| fData->unref(); |
| } |
| |
| void SkMemoryStream::setMemoryOwned(const void* src, size_t size) { |
| fData->unref(); |
| fData = SkData::NewFromMalloc(src, size); |
| fOffset = 0; |
| } |
| |
| void SkMemoryStream::setMemory(const void* src, size_t size, bool copyData) { |
| fData->unref(); |
| fData = newFromParams(src, size, copyData); |
| fOffset = 0; |
| } |
| |
| SkData* SkMemoryStream::copyToData() const { |
| fData->ref(); |
| return fData; |
| } |
| |
| SkData* SkMemoryStream::setData(SkData* data) { |
| fData->unref(); |
| if (NULL == data) { |
| fData = SkData::NewEmpty(); |
| } else { |
| fData = data; |
| fData->ref(); |
| } |
| return data; |
| } |
| |
| void SkMemoryStream::skipToAlign4() { |
| // cast to remove unary-minus warning |
| fOffset += -(int)fOffset & 0x03; |
| } |
| |
| size_t SkMemoryStream::read(void* buffer, size_t size) { |
| size_t dataSize = fData->size(); |
| |
| if (size > dataSize - fOffset) { |
| size = dataSize - fOffset; |
| } |
| if (buffer) { |
| memcpy(buffer, fData->bytes() + fOffset, size); |
| } |
| fOffset += size; |
| return size; |
| } |
| |
| bool SkMemoryStream::isAtEnd() const { |
| return fOffset == fData->size(); |
| } |
| |
| bool SkMemoryStream::rewind() { |
| fOffset = 0; |
| return true; |
| } |
| |
| SkMemoryStream* SkMemoryStream::duplicate() const { |
| return SkNEW_ARGS(SkMemoryStream, (fData)); |
| } |
| |
| size_t SkMemoryStream::getPosition() const { |
| return fOffset; |
| } |
| |
| bool SkMemoryStream::seek(size_t position) { |
| fOffset = position > fData->size() |
| ? fData->size() |
| : position; |
| return true; |
| } |
| |
| bool SkMemoryStream::move(long offset) { |
| return this->seek(fOffset + offset); |
| } |
| |
| SkMemoryStream* SkMemoryStream::fork() const { |
| SkAutoTUnref<SkMemoryStream> that(this->duplicate()); |
| that->seek(fOffset); |
| return that.detach(); |
| } |
| |
| size_t SkMemoryStream::getLength() const { |
| return fData->size(); |
| } |
| |
| const void* SkMemoryStream::getMemoryBase() { |
| return fData->data(); |
| } |
| |
| const void* SkMemoryStream::getAtPos() { |
| return fData->bytes() + fOffset; |
| } |
| |
| ///////////////////////////////////////////////////////////////////////////////////////////////////////// |
| ///////////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| SkFILEWStream::SkFILEWStream(const char path[]) |
| { |
| fFILE = sk_fopen(path, kWrite_SkFILE_Flag); |
| } |
| |
| SkFILEWStream::~SkFILEWStream() |
| { |
| if (fFILE) |
| sk_fclose(fFILE); |
| } |
| |
| bool SkFILEWStream::write(const void* buffer, size_t size) |
| { |
| if (fFILE == NULL) |
| return false; |
| |
| if (sk_fwrite(buffer, size, fFILE) != size) |
| { |
| SkDEBUGCODE(SkDebugf("SkFILEWStream failed writing %d bytes\n", size);) |
| sk_fclose(fFILE); |
| fFILE = NULL; |
| return false; |
| } |
| return true; |
| } |
| |
| void SkFILEWStream::flush() |
| { |
| if (fFILE) |
| sk_fflush(fFILE); |
| } |
| |
| //////////////////////////////////////////////////////////////////////// |
| |
| SkMemoryWStream::SkMemoryWStream(void* buffer, size_t size) |
| : fBuffer((char*)buffer), fMaxLength(size), fBytesWritten(0) |
| { |
| } |
| |
| bool SkMemoryWStream::write(const void* buffer, size_t size) |
| { |
| size = SkMin32(size, fMaxLength - fBytesWritten); |
| if (size > 0) |
| { |
| memcpy(fBuffer + fBytesWritten, buffer, size); |
| fBytesWritten += size; |
| return true; |
| } |
| return false; |
| } |
| |
| //////////////////////////////////////////////////////////////////////// |
| |
| #define SkDynamicMemoryWStream_MinBlockSize 256 |
| |
| struct SkDynamicMemoryWStream::Block { |
| Block* fNext; |
| char* fCurr; |
| char* fStop; |
| |
| const char* start() const { return (const char*)(this + 1); } |
| char* start() { return (char*)(this + 1); } |
| size_t avail() const { return fStop - fCurr; } |
| size_t written() const { return fCurr - this->start(); } |
| |
| void init(size_t size) |
| { |
| fNext = NULL; |
| fCurr = this->start(); |
| fStop = this->start() + size; |
| } |
| |
| const void* append(const void* data, size_t size) |
| { |
| SkASSERT((size_t)(fStop - fCurr) >= size); |
| memcpy(fCurr, data, size); |
| fCurr += size; |
| return (const void*)((const char*)data + size); |
| } |
| }; |
| |
| SkDynamicMemoryWStream::SkDynamicMemoryWStream() |
| : fHead(NULL), fTail(NULL), fBytesWritten(0), fCopy(NULL) |
| { |
| } |
| |
| SkDynamicMemoryWStream::~SkDynamicMemoryWStream() |
| { |
| reset(); |
| } |
| |
| void SkDynamicMemoryWStream::reset() |
| { |
| this->invalidateCopy(); |
| |
| Block* block = fHead; |
| |
| while (block != NULL) { |
| Block* next = block->fNext; |
| sk_free(block); |
| block = next; |
| } |
| fHead = fTail = NULL; |
| fBytesWritten = 0; |
| } |
| |
| bool SkDynamicMemoryWStream::write(const void* buffer, size_t count) |
| { |
| if (count > 0) { |
| this->invalidateCopy(); |
| |
| fBytesWritten += count; |
| |
| size_t size; |
| |
| if (fTail != NULL && fTail->avail() > 0) { |
| size = SkMin32(fTail->avail(), count); |
| buffer = fTail->append(buffer, size); |
| SkASSERT(count >= size); |
| count -= size; |
| if (count == 0) |
| return true; |
| } |
| |
| size = SkMax32(count, SkDynamicMemoryWStream_MinBlockSize); |
| Block* block = (Block*)sk_malloc_throw(sizeof(Block) + size); |
| block->init(size); |
| block->append(buffer, count); |
| |
| if (fTail != NULL) |
| fTail->fNext = block; |
| else |
| fHead = fTail = block; |
| fTail = block; |
| } |
| return true; |
| } |
| |
| bool SkDynamicMemoryWStream::write(const void* buffer, size_t offset, size_t count) |
| { |
| if (offset + count > fBytesWritten) { |
| return false; // test does not partially modify |
| } |
| |
| this->invalidateCopy(); |
| |
| Block* block = fHead; |
| while (block != NULL) { |
| size_t size = block->written(); |
| if (offset < size) { |
| size_t part = offset + count > size ? size - offset : count; |
| memcpy(block->start() + offset, buffer, part); |
| if (count <= part) |
| return true; |
| count -= part; |
| buffer = (const void*) ((char* ) buffer + part); |
| } |
| offset = offset > size ? offset - size : 0; |
| block = block->fNext; |
| } |
| return false; |
| } |
| |
| bool SkDynamicMemoryWStream::read(void* buffer, size_t offset, size_t count) |
| { |
| if (offset + count > fBytesWritten) |
| return false; // test does not partially modify |
| Block* block = fHead; |
| while (block != NULL) { |
| size_t size = block->written(); |
| if (offset < size) { |
| size_t part = offset + count > size ? size - offset : count; |
| memcpy(buffer, block->start() + offset, part); |
| if (count <= part) |
| return true; |
| count -= part; |
| buffer = (void*) ((char* ) buffer + part); |
| } |
| offset = offset > size ? offset - size : 0; |
| block = block->fNext; |
| } |
| return false; |
| } |
| |
| void SkDynamicMemoryWStream::copyTo(void* dst) const |
| { |
| if (fCopy) { |
| memcpy(dst, fCopy->data(), fBytesWritten); |
| } else { |
| Block* block = fHead; |
| |
| while (block != NULL) { |
| size_t size = block->written(); |
| memcpy(dst, block->start(), size); |
| dst = (void*)((char*)dst + size); |
| block = block->fNext; |
| } |
| } |
| } |
| |
| void SkDynamicMemoryWStream::padToAlign4() |
| { |
| // cast to remove unary-minus warning |
| int padBytes = -(int)fBytesWritten & 0x03; |
| if (padBytes == 0) |
| return; |
| int zero = 0; |
| write(&zero, padBytes); |
| } |
| |
| SkData* SkDynamicMemoryWStream::copyToData() const { |
| if (NULL == fCopy) { |
| void* buffer = sk_malloc_throw(fBytesWritten); |
| this->copyTo(buffer); |
| fCopy = SkData::NewFromMalloc(buffer, fBytesWritten); |
| } |
| fCopy->ref(); |
| return fCopy; |
| } |
| |
| void SkDynamicMemoryWStream::invalidateCopy() { |
| if (fCopy) { |
| fCopy->unref(); |
| fCopy = NULL; |
| } |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| void SkDebugWStream::newline() |
| { |
| #if defined(SK_DEBUG) || defined(SK_DEVELOPER) |
| SkDebugf("\n"); |
| #endif |
| } |
| |
| bool SkDebugWStream::write(const void* buffer, size_t size) |
| { |
| #if defined(SK_DEBUG) || defined(SK_DEVELOPER) |
| char* s = new char[size+1]; |
| memcpy(s, buffer, size); |
| s[size] = 0; |
| SkDebugf("%s", s); |
| delete[] s; |
| #endif |
| return true; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| |
| static SkData* mmap_filename(const char path[]) { |
| SkFILE* file = sk_fopen(path, kRead_SkFILE_Flag); |
| if (NULL == file) { |
| return NULL; |
| } |
| |
| SkData* data = SkData::NewFromFILE(file); |
| sk_fclose(file); |
| return data; |
| } |
| |
| SkStreamAsset* SkStream::NewFromFile(const char path[]) { |
| SkAutoTUnref<SkData> data(mmap_filename(path)); |
| if (data.get()) { |
| return SkNEW_ARGS(SkMemoryStream, (data.get())); |
| } |
| |
| // If we get here, then our attempt at using mmap failed, so try normal |
| // file access. |
| SkFILEStream* stream = SkNEW_ARGS(SkFILEStream, (path)); |
| if (!stream->isValid()) { |
| stream->unref(); |
| stream = NULL; |
| } |
| return stream; |
| } |