#include "SkStream.h"
+#include "SkStreamPriv.h"
#include "SkData.h"
#include "SkFixed.h"
#include "SkString.h"
#include "SkOSFile.h"
+#include "SkTypes.h"
///////////////////////////////////////////////////////////////////////////////
}
return stream;
}
+
+// Declared in SkStreamPriv.h:
+size_t SkCopyStreamToStorage(SkAutoMalloc* storage, SkStream* stream) {
+ SkASSERT(storage != NULL);
+ SkASSERT(stream != NULL);
+
+ if (stream->hasLength()) {
+ const size_t length = stream->getLength();
+ void* dst = storage->reset(length);
+ if (stream->read(dst, length) != length) {
+ return 0;
+ }
+ return length;
+ }
+
+ SkDynamicMemoryWStream tempStream;
+ // Arbitrary buffer size.
+ const size_t bufferSize = 256 * 1024; // 256KB
+ char buffer[bufferSize];
+ SkDEBUGCODE(size_t debugLength = 0;)
+ do {
+ size_t bytesRead = stream->read(buffer, bufferSize);
+ tempStream.write(buffer, bytesRead);
+ SkDEBUGCODE(debugLength += bytesRead);
+ SkASSERT(tempStream.bytesWritten() == debugLength);
+ } while (!stream->isAtEnd());
+ const size_t length = tempStream.bytesWritten();
+ void* dst = storage->reset(length);
+ tempStream.copyTo(dst);
+ return length;
+}
+
+// Declared in SkStreamPriv.h:
+SkData* SkCopyStreamToData(SkStream* stream) {
+ SkASSERT(stream != NULL);
+
+ if (stream->hasLength()) {
+ const size_t length = stream->getLength();
+ SkAutoMalloc dst(length);
+ if (stream->read(dst.get(), length) != length) {
+ return NULL;
+ }
+ return SkData::NewFromMalloc(dst.detach(), length);
+ }
+
+ SkDynamicMemoryWStream tempStream;
+ const size_t bufferSize = 4096;
+ char buffer[bufferSize];
+ do {
+ size_t bytesRead = stream->read(buffer, bufferSize);
+ tempStream.write(buffer, bytesRead);
+ } while (!stream->isAtEnd());
+ return tempStream.copyToData();
+}
+
+SkStreamRewindable* SkStreamRewindableFromSkStream(SkStream* stream) {
+ if (!stream) {
+ return NULL;
+ }
+ SkAutoTUnref<SkStreamRewindable> dupStream(stream->duplicate());
+ if (dupStream) {
+ return dupStream.detach();
+ }
+ stream->rewind();
+ if (stream->hasLength()) {
+ size_t length = stream->getLength();
+ if (stream->hasPosition()) { // If stream has length, but can't rewind.
+ length -= stream->getPosition();
+ }
+ SkAutoMalloc allocMemory(length);
+ SkDEBUGCODE(size_t read =) stream->read(allocMemory.get(), length);
+ SkASSERT(length == read);
+ SkAutoTUnref<SkData> data(
+ SkData::NewFromMalloc(allocMemory.detach(), length));
+ return SkNEW_ARGS(SkMemoryStream, (data.get()));
+ }
+ SkDynamicMemoryWStream tempStream;
+ const size_t bufferSize = 4096;
+ char buffer[bufferSize];
+ do {
+ size_t bytesRead = stream->read(buffer, bufferSize);
+ tempStream.write(buffer, bytesRead);
+ } while (!stream->isAtEnd());
+ return tempStream.detachAsStream(); // returns a SkBlockMemoryStream,
+ // cheaper than copying to SkData
+}