work on the native parser, in progress, uploaded to have a backup

experimental/PdfViewer/pdfparser/native/SkPdfObject.h

+#ifndef EXPERIMENTAL_PDFVIEWER_PDFPARSER_NATIVE_SKPDFOBJECT_H_
+#define EXPERIMENTAL_PDFVIEWER_PDFPARSER_NATIVE_SKPDFOBJECT_H_
+
+#include <stdint.h>
+#include <string.h>
+#include <string>
+#include "SkTDArray.h"
+#include "SkTDict.h"
+#include "SkRect.h"
+#include "SkMatrix.h"
+#include "SkString.h"
+
+#include "SkPdfNYI.h"
+#include "SkPdfConfig.h"
+
+class SkPdfDictionary;
+class SkPdfStream;
+class SkPdfAllocator;
+
+// TODO(edisonn): macro it and move it to utils
+SkMatrix SkMatrixFromPdfMatrix(double array[6]);
+
+
+#define kFilteredStreamBit 0
+#define kUnfilteredStreamBit 1
+
+
+class SkPdfObject {
+ public:
+     enum ObjectType {
+         kInvalid_PdfObjectType,
+
+         kBoolean_PdfObjectType,
+         kInteger_PdfObjectType,
+         kReal_PdfObjectType,
+         kString_PdfObjectType,
+         kHexString_PdfObjectType,
+         kName_PdfObjectType,
+         kKeyword_PdfObjectType,
+         //kStream_PdfObjectType,  //  attached to a Dictionary
+         kArray_PdfObjectType,
+         kDictionary_PdfObjectType,
+         kNull_PdfObjectType,
+
+         // TODO(edisonn): after the pdf has been loaded completely, resolve all references
+         // try the same thing with delayed loaded ...
+         kReference_PdfObjectType,
+
+         kUndefined_PdfObjectType,  // per 1.4 spec, if the same key appear twice in the dictionary, the value is undefined
+     };
+
+private:
+    struct NotOwnedString {
+        unsigned char* fBuffer;
+        size_t fBytes;
+    };
+
+    struct Reference {
+        unsigned int fId;
+        unsigned int fGen;
+    };
+
+    // TODO(edisonn): add stream start, stream end, where stream is weither the file
+    // or decoded/filtered pdf stream
+
+    // TODO(edisonn): add warning/report per object
+    // TODO(edisonn): add flag fUsed, to be used once the parsing is complete,
+    // so we could show what parts have been proccessed, ignored, or generated errors
+
+    ObjectType fObjectType;
+
+    union {
+        bool fBooleanValue;
+        int64_t fIntegerValue;
+        // TODO(edisonn): double, float? typedefed
+        double fRealValue;
+        NotOwnedString fStr;
+
+        // TODO(edisonn): make sure the foorprint of fArray and fMap is small, otherwise, use pointers, or classes with up to 8 bytes in footprint
+        SkTDArray<SkPdfObject*>* fArray;
+        Reference fRef;
+    };
+    SkTDict<SkPdfObject*>* fMap;
+    void* fData;
+
+
+public:
+
+    SkPdfObject() : fObjectType(kInvalid_PdfObjectType), fData(NULL) {}
+
+    inline void* data() {
+        return fData;
+    }
+
+    inline void setData(void* data) {
+        fData = data;
+    }
+
+    ~SkPdfObject() {
+        reset();
+    }
+
+    void reset() {
+        switch (fObjectType) {
+            case kArray_PdfObjectType:
+                delete fArray;
+                break;
+
+            case kDictionary_PdfObjectType:
+                delete fMap;
+                break;
+
+            default:
+                break;
+        }
+        fObjectType = kInvalid_PdfObjectType;
+    }
+
+    ObjectType type() { return fObjectType; }
+
+    const char* c_str() const {
+        switch (fObjectType) {
+            case kString_PdfObjectType:
+            case kHexString_PdfObjectType:
+            case kKeyword_PdfObjectType:
+                return (const char*)fStr.fBuffer;
+
+            default:
+                // TODO(edisonn): report/warning
+                return NULL;
+        }
+    }
+
+    size_t len() const {
+        switch (fObjectType) {
+            case kString_PdfObjectType:
+            case kHexString_PdfObjectType:
+            case kKeyword_PdfObjectType:
+                return fStr.fBytes;
+
+            default:
+                // TODO(edisonn): report/warning
+                return 0;
+        }
+    }
+
+
+    // TODO(edisonn): NYI
+    SkPdfDate& dateValue() const {
+        static SkPdfDate nyi;
+        return nyi;
+    }
+
+    // TODO(edisonn): NYI
+    SkPdfFunction& functionValue() const {
+        static SkPdfFunction nyi;
+        return nyi;
+    }
+
+    // TODO(edisonn): NYI
+    SkPdfFileSpec& fileSpecValue() const {
+        static SkPdfFileSpec nyi;
+        return nyi;
+    }
+
+    // TODO(edisonn): NYI
+    SkPdfTree& treeValue() const {
+        static SkPdfTree nyi;
+        return nyi;
+    }
+
+
+    static void makeBoolean(bool value, SkPdfObject* obj) {
+        SkASSERT(obj->fObjectType == kInvalid_PdfObjectType);
+
+        obj->fObjectType = kBoolean_PdfObjectType;
+        obj->fBooleanValue = value;
+    }
+
+    static SkPdfObject makeBoolean(bool value) {
+        SkPdfObject obj;
+        obj.fObjectType = kBoolean_PdfObjectType;
+        obj.fBooleanValue = value;
+        return obj;
+    }
+
+    static void makeInteger(int64_t value, SkPdfObject* obj) {
+        SkASSERT(obj->fObjectType == kInvalid_PdfObjectType);
+
+        obj->fObjectType = kInteger_PdfObjectType;
+        obj->fIntegerValue = value;
+    }
+
+    static void makeReal(double value, SkPdfObject* obj) {
+        SkASSERT(obj->fObjectType == kInvalid_PdfObjectType);
+
+        obj->fObjectType = kReal_PdfObjectType;
+        obj->fRealValue = value;
+    }
+
+    static void makeNull(SkPdfObject* obj) {
+        SkASSERT(obj->fObjectType == kInvalid_PdfObjectType);
+
+        obj->fObjectType = kNull_PdfObjectType;
+    }
+
+    static SkPdfObject makeNull() {
+        SkPdfObject obj;
+        obj.fObjectType = kNull_PdfObjectType;
+        return obj;
+    }
+
+    static SkPdfObject kNull;
+
+    static void makeNumeric(unsigned char* start, unsigned char* end, SkPdfObject* obj) {
+        SkASSERT(obj->fObjectType == kInvalid_PdfObjectType);
+
+        // TODO(edisonn): NYI properly
+        // if has dot (impl), or exceeds max int, is real, otherwise is int
+        bool isInt = true;
+        for (unsigned char* current = start; current < end; current++) {
+            if (*current == '.') {
+                isInt = false;
+                break;
+            }
+            // TODO(edisonn): report parse issue with numbers like "24asdasd123"
+        }
+        if (isInt) {
+            makeInteger(atol((const char*)start), obj);
+        } else {
+            makeReal(atof((const char*)start), obj);
+        }
+    }
+
+    static void makeReference(unsigned int id, unsigned int gen, SkPdfObject* obj) {
+        SkASSERT(obj->fObjectType == kInvalid_PdfObjectType);
+
+        obj->fObjectType = kReference_PdfObjectType;
+        obj->fRef.fId = id;
+        obj->fRef.fGen = gen;
+    }
+
+
+    static void makeString(unsigned char* start, SkPdfObject* obj) {
+        makeStringCore(start, strlen((const char*)start), obj, kString_PdfObjectType);
+    }
+
+    static void makeString(unsigned char* start, unsigned char* end, SkPdfObject* obj) {
+        makeStringCore(start, end - start, obj, kString_PdfObjectType);
+    }
+
+    static void makeString(unsigned char* start, size_t bytes, SkPdfObject* obj) {
+        makeStringCore(start, bytes, obj, kString_PdfObjectType);
+    }
+
+
+    static void makeHexString(unsigned char* start, SkPdfObject* obj) {
+        makeStringCore(start, strlen((const char*)start), obj, kHexString_PdfObjectType);
+    }
+
+    static void makeHexString(unsigned char* start, unsigned char* end, SkPdfObject* obj) {
+        makeStringCore(start, end - start, obj, kHexString_PdfObjectType);
+    }
+
+    static void makeHexString(unsigned char* start, size_t bytes, SkPdfObject* obj) {
+        makeStringCore(start, bytes, obj, kHexString_PdfObjectType);
+    }
+
+
+    static void makeName(unsigned char* start, SkPdfObject* obj) {
+        makeStringCore(start, strlen((const char*)start), obj, kName_PdfObjectType);
+    }
+
+    static void makeName(unsigned char* start, unsigned char* end, SkPdfObject* obj) {
+        makeStringCore(start, end - start, obj, kName_PdfObjectType);
+    }
+
+    static void makeName(unsigned char* start, size_t bytes, SkPdfObject* obj) {
+        makeStringCore(start, bytes, obj, kName_PdfObjectType);
+    }
+
+
+    static void makeKeyword(unsigned char* start, SkPdfObject* obj) {
+        makeStringCore(start, strlen((const char*)start), obj, kKeyword_PdfObjectType);
+    }
+
+    static void makeKeyword(unsigned char* start, unsigned char* end, SkPdfObject* obj) {
+        makeStringCore(start, end - start, obj, kKeyword_PdfObjectType);
+    }
+
+    static void makeKeyword(unsigned char* start, size_t bytes, SkPdfObject* obj) {
+        makeStringCore(start, bytes, obj, kKeyword_PdfObjectType);
+    }
+
+
+
+    // TODO(edisonn): make the functions to return SkPdfArray, move these functions in SkPdfArray
+    static void makeEmptyArray(SkPdfObject* obj) {
+        SkASSERT(obj->fObjectType == kInvalid_PdfObjectType);
+
+        obj->fObjectType = kArray_PdfObjectType;
+        obj->fArray = new SkTDArray<SkPdfObject*>();
+        // return (SkPdfArray*)obj;
+    }
+
+    bool appendInArray(SkPdfObject* obj) {
+        SkASSERT(fObjectType == kArray_PdfObjectType);
+        if (fObjectType != kArray_PdfObjectType) {
+            // TODO(edisonn): report err
+            return false;
+        }
+
+        fArray->push(obj);
+        return true;
+    }
+
+    size_t size() const {
+        SkASSERT(fObjectType == kArray_PdfObjectType);
+
+        return fArray->count();
+    }
+
+    SkPdfObject* objAtAIndex(int i) {
+        SkASSERT(fObjectType == kArray_PdfObjectType);
+
+        return (*fArray)[i];
+    }
+
+    SkPdfObject* removeLastInArray() {
+        SkASSERT(fObjectType == kArray_PdfObjectType);
+
+        SkPdfObject* ret = NULL;
+        fArray->pop(&ret);
+
+        return ret;
+    }
+
+
+    const SkPdfObject* objAtAIndex(int i) const {
+        SkASSERT(fObjectType == kArray_PdfObjectType);
+
+        return (*fArray)[i];
+    }
+
+    SkPdfObject* operator[](int i) {
+        SkASSERT(fObjectType == kArray_PdfObjectType);
+
+        return (*fArray)[i];
+    }
+
+    const SkPdfObject* operator[](int i) const {
+        SkASSERT(fObjectType == kArray_PdfObjectType);
+
+        return (*fArray)[i];
+    }
+
+
+    // TODO(edisonn): make the functions to return SkPdfDictionary, move these functions in SkPdfDictionary
+    static void makeEmptyDictionary(SkPdfObject* obj) {
+        SkASSERT(obj->fObjectType == kInvalid_PdfObjectType);
+
+        obj->fObjectType = kDictionary_PdfObjectType;
+        obj->fMap = new SkTDict<SkPdfObject*>(1);
+        obj->fStr.fBuffer = NULL;
+        obj->fStr.fBytes = 0;
+    }
+
+    // TODO(edisonn): get all the possible names from spec, and compute a hash function
+    // that would create no overlaps in the same dictionary
+    // or build a tree of chars that when followed goes to a unique id/index/hash
+    // TODO(edisonn): generate constants like kDictFoo, kNameDict_name
+    // which will be used in code
+    // add function SkPdfFastNameKey key(const char* key);
+    // TODO(edisonn): setting the same key twike, will make the value undefined!
+    bool set(SkPdfObject* key, SkPdfObject* value) {
+        SkASSERT(fObjectType == kDictionary_PdfObjectType);
+        SkASSERT(key->fObjectType == kName_PdfObjectType);
+
+        if (key->fObjectType != kName_PdfObjectType || fObjectType != kDictionary_PdfObjectType) {
+            // TODO(edisonn): report err
+            return false;
+        }
+
+        // we rewrite all delimiters and white spaces with '\0', so we expect the end of name to be '\0'
+        SkASSERT(key->fStr.fBuffer[key->fStr.fBytes] == '\0');
+
+        return set((char*)key->fStr.fBuffer, value);
+    }
+
+    bool set(const char* key, SkPdfObject* value) {
+        SkASSERT(fObjectType == kDictionary_PdfObjectType);
+
+        if (fObjectType != kDictionary_PdfObjectType) {
+            // TODO(edisonn): report err
+            return false;
+        }
+
+        return fMap->set(key, value);
+    }
+
+    SkPdfObject* get(SkPdfObject* key) {
+        SkASSERT(fObjectType == kDictionary_PdfObjectType);
+        SkASSERT(key->fObjectType == kName_PdfObjectType);
+
+        if (key->fObjectType != kName_PdfObjectType || fObjectType != kDictionary_PdfObjectType) {
+            // TODO(edisonn): report err
+            return false;
+        }
+
+        SkASSERT(key->fStr.fBuffer[key->fStr.fBytes] == '\0');
+
+        return get((char*)key->fStr.fBuffer);
+    }
+
+    SkPdfObject* get(const char* key) {
+        SkASSERT(fObjectType == kDictionary_PdfObjectType);
+        SkASSERT(key);
+        if (fObjectType != kDictionary_PdfObjectType) {
+            // TODO(edisonn): report err
+            return NULL;
+        }
+        SkPdfObject* ret = NULL;
+        fMap->find(key, &ret);
+        return ret;
+    }
+
+    const SkPdfObject* get(SkPdfObject* key) const {
+        SkASSERT(fObjectType == kDictionary_PdfObjectType);
+        SkASSERT(key->fObjectType == kName_PdfObjectType);
+
+        if (key->fObjectType != kName_PdfObjectType || fObjectType != kDictionary_PdfObjectType) {
+            // TODO(edisonn): report err
+            return false;
+        }
+
+        SkASSERT(key->fStr.fBuffer[key->fStr.fBytes] == '\0');
+
+        return get((char*)key->fStr.fBuffer);
+    }
+
+
+    const SkPdfObject* get(const char* key) const {
+        SkASSERT(fObjectType == kDictionary_PdfObjectType);
+        SkASSERT(key);
+        if (fObjectType != kDictionary_PdfObjectType) {
+            // TODO(edisonn): report err
+            return NULL;
+        }
+        SkPdfObject* ret = NULL;
+        fMap->find(key, &ret);
+        return ret;
+    }
+
+    const SkPdfObject* get(const char* key, const char* abr) const {
+        const SkPdfObject* ret = get(key);
+        // TODO(edisonn): / is a valid name, and it might be an abreviation, so "" should not be like NULL
+        // make this distiontion in generator, and remove "" from condition
+        if (ret != NULL || abr == NULL || *abr == '\0') {
+            return ret;
+        }
+        return get(abr);
+    }
+
+    SkPdfObject* get(const char* key, const char* abr) {
+        SkPdfObject* ret = get(key);
+        // TODO(edisonn): / is a valid name, and it might be an abreviation, so "" should not be like NULL
+        // make this distiontion in generator, and remove "" from condition
+        if (ret != NULL || abr == NULL || *abr == '\0') {
+            return ret;
+        }
+        return get(abr);
+    }
+
+    SkPdfDictionary* asDictionary() {
+        SkASSERT(isDictionary());
+        if (!isDictionary()) {
+            return NULL;
+        }
+        return (SkPdfDictionary*) this;
+    }
+
+    const SkPdfDictionary* asDictionary() const {
+        SkASSERT(isDictionary());
+        if (!isDictionary()) {
+            return NULL;
+        }
+        return (SkPdfDictionary*) this;
+    }
+
+
+    bool isReference() const {
+        return fObjectType == kReference_PdfObjectType;
+    }
+
+    bool isBoolean() const {
+        return fObjectType == kBoolean_PdfObjectType;
+    }
+
+    bool isInteger() const {
+        return fObjectType == kInteger_PdfObjectType;
+    }
+private:
+    bool isReal() const {
+        return fObjectType == kReal_PdfObjectType;
+    }
+public:
+    bool isNumber() const {
+        return fObjectType == kInteger_PdfObjectType || fObjectType == kReal_PdfObjectType;
+    }
+
+    bool isKeywordReference() const {
+        return fObjectType == kKeyword_PdfObjectType && fStr.fBytes == 1 && fStr.fBuffer[0] == 'R';
+    }
+
+    bool isKeyword() const {
+        return fObjectType == kKeyword_PdfObjectType;
+    }
+
+    bool isName() const {
+        return fObjectType == kName_PdfObjectType;
+    }
+
+    bool isArray() const {
+        return fObjectType == kArray_PdfObjectType;
+    }
+
+    bool isDate() const {
+        return fObjectType == kString_PdfObjectType || fObjectType == kHexString_PdfObjectType;
+    }
+
+    bool isDictionary() const {
+        return fObjectType == kDictionary_PdfObjectType;
+    }
+
+    bool isFunction() const {
+        return false;  // NYI
+    }
+
+    bool isRectangle() const {
+        return fObjectType == kArray_PdfObjectType && fArray->count() == 4; // NYI + and elems are numbers
+    }
+
+    // TODO(edisonn): has stream .. or is stream ... TBD
+    bool hasStream() const {
+        return isDictionary() && fStr.fBuffer != NULL;
+    }
+
+    // TODO(edisonn): has stream .. or is stream ... TBD
+    const SkPdfStream* getStream() const {
+        return hasStream() ? (const SkPdfStream*)this : NULL;
+    }
+
+    SkPdfStream* getStream() {
+        return hasStream() ? (SkPdfStream*)this : NULL;
+    }
+
+    bool isAnyString() const {
+        return fObjectType == kString_PdfObjectType || fObjectType == kHexString_PdfObjectType;
+    }
+
+    bool isMatrix() const {
+        return fObjectType == kArray_PdfObjectType && fArray->count() == 6; // NYI + and elems are numbers
+    }
+
+    inline int64_t intValue() const {
+        SkASSERT(fObjectType == kInteger_PdfObjectType);
+
+        if (fObjectType != kInteger_PdfObjectType) {
+            // TODO(edisonn): log err
+            return 0;
+        }
+        return fIntegerValue;
+    }
+private:
+    inline double realValue() const {
+        SkASSERT(fObjectType == kReal_PdfObjectType);
+
+        if (fObjectType != kReal_PdfObjectType) {
+            // TODO(edisonn): log err
+            return 0;
+        }
+        return fRealValue;
+    }
+public:
+    inline double numberValue() const {
+        SkASSERT(isNumber());
+
+        if (!isNumber()) {
+            // TODO(edisonn): log err
+            return 0;
+        }
+        return fObjectType == kReal_PdfObjectType ? fRealValue : fIntegerValue;
+    }
+
+    int referenceId() const {
+        SkASSERT(fObjectType == kReference_PdfObjectType);
+        return fRef.fId;
+    }
+
+    int referenceGeneration() const {
+        SkASSERT(fObjectType == kReference_PdfObjectType);
+        return fRef.fGen;
+    }
+
+    inline const char* nameValue() const {
+        SkASSERT(fObjectType == kName_PdfObjectType);
+
+        if (fObjectType != kName_PdfObjectType) {
+            // TODO(edisonn): log err
+            return "";
+        }
+        return (const char*)fStr.fBuffer;
+    }
+
+    inline const char* stringValue() const {
+        SkASSERT(fObjectType == kString_PdfObjectType || fObjectType == kHexString_PdfObjectType);
+
+        if (fObjectType != kString_PdfObjectType && fObjectType != kHexString_PdfObjectType) {
+            // TODO(edisonn): log err
+            return "";
+        }
+        return (const char*)fStr.fBuffer;
+    }
+
+    // TODO(edisonn): nameValue2 and stringValue2 are used to make code generation easy,
+    // but it is not a performat way to do it, since it will create an extra copy
+    // remove these functions and make code generated faster
+    inline std::string nameValue2() const {
+        SkASSERT(fObjectType == kName_PdfObjectType);
+
+        if (fObjectType != kName_PdfObjectType) {
+            // TODO(edisonn): log err
+            return "";
+        }
+        return (const char*)fStr.fBuffer;
+    }
+
+    inline std::string stringValue2() const {
+        SkASSERT(fObjectType == kString_PdfObjectType || fObjectType == kHexString_PdfObjectType);
+
+        if (fObjectType != kString_PdfObjectType && fObjectType != kHexString_PdfObjectType) {
+            // TODO(edisonn): log err
+            return "";
+        }
+        return (const char*)fStr.fBuffer;
+    }
+
+    inline bool boolValue() const {
+        SkASSERT(fObjectType == kBoolean_PdfObjectType);
+
+        if (fObjectType == kBoolean_PdfObjectType) {
+            // TODO(edisonn): log err
+            return false;
+        }
+        return fBooleanValue;
+    }
+
+    SkRect rectangleValue() const {
+        SkASSERT(isRectangle());
+        if (!isRectangle()) {
+            return SkRect::MakeEmpty();
+        }
+
+        double array[4];
+        for (int i = 0; i < 4; i++) {
+            // TODO(edisonn): version where we could resolve references?
+            const SkPdfObject* elem = objAtAIndex(i);
+            if (elem == NULL || !elem->isNumber()) {
+                // TODO(edisonn): report error
+                return SkRect::MakeEmpty();
+            }
+            array[i] = elem->numberValue();
+        }
+
+        return SkRect::MakeLTRB(SkDoubleToScalar(array[0]),
+                                SkDoubleToScalar(array[1]),
+                                SkDoubleToScalar(array[2]),
+                                SkDoubleToScalar(array[3]));
+    }
+
+    SkMatrix matrixValue() const {
+        SkASSERT(isMatrix());
+        if (!isMatrix()) {
+            return SkMatrix::I();
+        }
+
+        double array[6];
+        for (int i = 0; i < 6; i++) {
+            // TODO(edisonn): version where we could resolve references?
+            const SkPdfObject* elem = objAtAIndex(i);
+            if (elem == NULL || !elem->isNumber()) {
+                // TODO(edisonn): report error
+                return SkMatrix::I();
+            }
+            array[i] = elem->numberValue();
+        }
+
+        return SkMatrixFromPdfMatrix(array);
+    }
+
+    bool filterStream(SkPdfAllocator* allocator);
+
+
+    bool GetFilteredStreamRef(unsigned char** buffer, size_t* len, SkPdfAllocator* allocator) {
+        // TODO(edisonn): add params that couls let the last filter in place if it is jpeg or png to fast load images
+        if (!hasStream()) {
+            return false;
+        }
+
+        filterStream(allocator);
+
+        if (buffer) {
+            *buffer = fStr.fBuffer;
+        }
+
+        if (len) {
+            *len = fStr.fBytes >> 1;  // last bit
+        }
+
+        return true;
+    }
+
+    bool isStreamFiltered() const {
+        return hasStream() && ((fStr.fBytes & 1) == kFilteredStreamBit);
+    }
+
+    bool GetUnfilteredStreamRef(unsigned char** buffer, size_t* len) const {
+        if (isStreamFiltered()) {
+            return false;
+        }
+
+        if (!hasStream()) {
+            return false;
+        }
+
+        if (buffer) {
+            *buffer = fStr.fBuffer;
+        }
+
+        if (len) {
+            *len = fStr.fBytes >> 1;  // remove slast bit
+        }
+
+        return true;
+    }
+
+    bool addStream(unsigned char* buffer, size_t len) {
+        SkASSERT(!hasStream());
+        SkASSERT(isDictionary());
+
+        if (!isDictionary() || hasStream()) {
+            return false;
+        }
+
+        fStr.fBuffer = buffer;
+        fStr.fBytes = (len << 2) + kUnfilteredStreamBit;
+
+        return true;
+    }
+
+    SkString toString() {
+        SkString str;
+        switch (fObjectType) {
+            case kInvalid_PdfObjectType:
+                str.append("Invalid");
+                break;
+
+            case kBoolean_PdfObjectType:
+                str.appendf("Boolean: %s", fBooleanValue ? "true" : "false");
+                break;
+
+            case kInteger_PdfObjectType:
+                str.appendf("Integer: %i", (int)fIntegerValue);
+                break;
+
+            case kReal_PdfObjectType:
+                str.appendf("Real: %f", fRealValue);
+                break;
+
+            case kString_PdfObjectType:
+                str.appendf("String, len() = %u: ", (unsigned int)fStr.fBytes);
+                str.append((const char*)fStr.fBuffer, fStr.fBytes);
+                break;
+
+            case kHexString_PdfObjectType:
+                str.appendf("HexString, len() = %u: ", (unsigned int)fStr.fBytes);
+                str.append((const char*)fStr.fBuffer, fStr.fBytes);
+                break;
+
+            case kName_PdfObjectType:
+                str.appendf("Name, len() = %u: ", (unsigned int)fStr.fBytes);
+                str.append((const char*)fStr.fBuffer, fStr.fBytes);
+                break;
+
+            case kKeyword_PdfObjectType:
+                str.appendf("Keyword, len() = %u: ", (unsigned int)fStr.fBytes);
+                str.append((const char*)fStr.fBuffer, fStr.fBytes);
+                break;
+
+            case kArray_PdfObjectType:
+                str.append("Array, size() = %i [", size());
+                for (unsigned int i = 0; i < size(); i++) {
+                    str.append(objAtAIndex(i)->toString());
+                }
+                str.append("]");
+                break;
+
+            case kDictionary_PdfObjectType:
+                // TODO(edisonn): NYI
+                str.append("Dictionary: NYI");
+                if (hasStream()) {
+                    str.append(" HAS_STREAM");
+                }
+                break;
+
+            case kNull_PdfObjectType:
+                str = "NULL";
+                break;
+
+            case kReference_PdfObjectType:
+                str.appendf("Reference: %i %i", fRef.fId, fRef.fGen);
+                break;
+
+            case kUndefined_PdfObjectType:
+                str = "Undefined";
+                break;
+
+            default:
+                str = "Internal Error Object Type";
+                break;
+        }
+
+        return str;
+    }
+
+private:
+    static void makeStringCore(unsigned char* start, SkPdfObject* obj, ObjectType type) {
+        makeStringCore(start, strlen((const char*)start), obj, type);
+    }
+
+    static void makeStringCore(unsigned char* start, unsigned char* end, SkPdfObject* obj, ObjectType type) {
+        makeStringCore(start, end - start, obj, type);
+    }
+
+    static void makeStringCore(unsigned char* start, size_t bytes, SkPdfObject* obj, ObjectType type) {
+        SkASSERT(obj->fObjectType == kInvalid_PdfObjectType);
+
+        obj->fObjectType = type;
+        obj->fStr.fBuffer = start;
+        obj->fStr.fBytes = bytes;
+    }
+
+    bool applyFilter(const char* name, SkPdfAllocator* allocator);
+    bool applyFlateDecodeFilter(SkPdfAllocator* allocator);
+    bool applyDCTDecodeFilter(SkPdfAllocator* allocator);
+};
+
+class SkPdfStream : public SkPdfObject {};
+class SkPdfArray : public SkPdfObject {};
+class SkPdfString : public SkPdfObject {};
+class SkPdfHexString : public SkPdfObject {};
+class SkPdfInteger : public SkPdfObject {};
+class SkPdfReal : public SkPdfObject {};
+class SkPdfNumber : public SkPdfObject {};
+
+#endif  // EXPERIMENTAL_PDFVIEWER_PDFPARSER_NATIVE_SKPDFOBJECT_H_