third_party/WebKit/Source/core/fileapi/FileReaderSync.cpp

/*
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 * modification, are permitted provided that the following conditions are
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#include "core/fileapi/FileReaderSync.h"

#include "bindings/core/v8/ExceptionState.h"
#include "core/dom/DOMArrayBuffer.h"
#include "core/dom/ExceptionCode.h"
#include "core/fileapi/Blob.h"
#include "core/fileapi/FileError.h"
#include "core/fileapi/FileReaderLoader.h"
#include "wtf/PassRefPtr.h"

namespace blink {

FileReaderSync::FileReaderSync()
{
}

PassRefPtr<DOMArrayBuffer> FileReaderSync::readAsArrayBuffer(ExecutionContext* executionContext, Blob* blob, ExceptionState& exceptionState)
{
    ASSERT(blob);

    FileReaderLoader loader(FileReaderLoader::ReadAsArrayBuffer, nullptr);
    startLoading(executionContext, loader, *blob, exceptionState);

    return loader.arrayBufferResult();
}

String FileReaderSync::readAsBinaryString(ExecutionContext* executionContext, Blob* blob, ExceptionState& exceptionState)
{
    ASSERT(blob);

    FileReaderLoader loader(FileReaderLoader::ReadAsBinaryString, 0);
    startLoading(executionContext, loader, *blob, exceptionState);
    return loader.stringResult();
}

String FileReaderSync::readAsText(ExecutionContext* executionContext, Blob* blob, const String& encoding, ExceptionState& exceptionState)
{
    ASSERT(blob);

    FileReaderLoader loader(FileReaderLoader::ReadAsText, nullptr);
    loader.setEncoding(encoding);
    startLoading(executionContext, loader, *blob, exceptionState);
    return loader.stringResult();
}

String FileReaderSync::readAsDataURL(ExecutionContext* executionContext, Blob* blob, ExceptionState& exceptionState)
{
    ASSERT(blob);

    FileReaderLoader loader(FileReaderLoader::ReadAsDataURL, nullptr);
    loader.setDataType(blob->type());
    startLoading(executionContext, loader, *blob, exceptionState);
    return loader.stringResult();
}

void FileReaderSync::startLoading(ExecutionContext* executionContext, FileReaderLoader& loader, const Blob& blob, ExceptionState& exceptionState)
{
    loader.start(executionContext, blob.blobDataHandle());
    if (loader.errorCode())
        FileError::throwDOMException(exceptionState, loader.errorCode());
}

} // namespace blink