Remove experimental/PdfViewer

experimental/PdfViewer/pdfparser/native/SkPdfNativeTokenizer.h

-/*
- * Copyright 2013 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#ifndef SkPdfNativeTokenizer_DEFINED
-#define SkPdfNativeTokenizer_DEFINED
-
-#include <math.h>
-#include <string.h>
-
-#include "SkPdfConfig.h"
-#include "SkTDArray.h"
-#include "SkTDict.h"
-
-// All these constants are defined by the PDF 1.4 Spec.
-
-class SkPdfDictionary;
-class SkPdfImageDictionary;
-class SkPdfNativeDoc;
-class SkPdfNativeObject;
-
-
-// White Spaces
-#define kNUL_PdfWhiteSpace '\x00'
-#define kHT_PdfWhiteSpace  '\x09'
-#define kLF_PdfWhiteSpace  '\x0A'
-#define kFF_PdfWhiteSpace  '\x0C'
-#define kCR_PdfWhiteSpace  '\x0D'
-#define kSP_PdfWhiteSpace  '\x20'
-
-// PdfDelimiters
-#define kOpenedRoundBracket_PdfDelimiter        '('
-#define kClosedRoundBracket_PdfDelimiter        ')'
-#define kOpenedInequityBracket_PdfDelimiter     '<'
-#define kClosedInequityBracket_PdfDelimiter     '>'
-#define kOpenedSquareBracket_PdfDelimiter       '['
-#define kClosedSquareBracket_PdfDelimiter       ']'
-#define kOpenedCurlyBracket_PdfDelimiter        '{'
-#define kClosedCurlyBracket_PdfDelimiter        '}'
-#define kNamed_PdfDelimiter                     '/'
-#define kComment_PdfDelimiter                   '%'
-
-#define kEscape_PdfSpecial                      '\\'
-#define kBackspace_PdfSpecial                   '\x08'
-
-// TODO(edisonn): what is the faster way for compiler/machine type to evaluate this expressions?
-// we should evaluate all options. might be even different from one machine to another
-// 1) expand expression, let compiler optimize it
-// 2) binary search
-// 3) linear search in array
-// 4) vector (e.f. T type[256] .. return type[ch] ...
-// 5) manually build the expression with least number of operators, e.g. for consecutive
-// chars, we can use an binary equal ignoring last bit
-#define isPdfWhiteSpace(ch) (((ch)==kNUL_PdfWhiteSpace)|| \
-                             ((ch)==kHT_PdfWhiteSpace)|| \
-                             ((ch)==kLF_PdfWhiteSpace)|| \
-                             ((ch)==kFF_PdfWhiteSpace)|| \
-                             ((ch)==kCR_PdfWhiteSpace)|| \
-                             ((ch)==kSP_PdfWhiteSpace))
-
-#define isPdfEOL(ch) (((ch)==kLF_PdfWhiteSpace)||((ch)==kCR_PdfWhiteSpace))
-
-
-#define isPdfDelimiter(ch) (((ch)==kOpenedRoundBracket_PdfDelimiter)||\
-                            ((ch)==kClosedRoundBracket_PdfDelimiter)||\
-                            ((ch)==kOpenedInequityBracket_PdfDelimiter)||\
-                            ((ch)==kClosedInequityBracket_PdfDelimiter)||\
-                            ((ch)==kOpenedSquareBracket_PdfDelimiter)||\
-                            ((ch)==kClosedSquareBracket_PdfDelimiter)||\
-                            ((ch)==kOpenedCurlyBracket_PdfDelimiter)||\
-                            ((ch)==kClosedCurlyBracket_PdfDelimiter)||\
-                            ((ch)==kNamed_PdfDelimiter)||\
-                            ((ch)==kComment_PdfDelimiter))
-
-#define isPdfWhiteSpaceOrPdfDelimiter(ch) (isPdfWhiteSpace(ch)||isPdfDelimiter(ch))
-
-#define isPdfDigit(ch) ((ch)>='0'&&(ch)<='9')
-#define isPdfNumeric(ch) (isPdfDigit(ch)||(ch)=='+'||(ch)=='-'||(ch)=='.')
-
-const unsigned char* skipPdfWhiteSpaces(const unsigned char* buffer, const unsigned char* end);
-const unsigned char* endOfPdfToken(const unsigned char* start, const unsigned char* end);
-
-#define BUFFER_SIZE 1024
-
-/** \class SkPdfAllocator
- *
- *   An allocator only allocates memory, and it deletes it all when the allocator is destroyed.
- *   This strategy would allow us not to do any garbage collection while we parse and/or render
- *   a pdf.
- *
- */
-class SkPdfAllocator {
-public:
-    SkPdfAllocator() {
-        fSizeInBytes = sizeof(*this);
-        fCurrent = allocBlock();
-        fCurrentUsed = 0;
-    }
-
-    ~SkPdfAllocator();
-
-    // Allocates an object. It will be reset automatically when ~SkPdfAllocator() is called.
-    SkPdfNativeObject* allocObject();
-
-    // Allocates a buffer. It will be freed automatically when ~SkPdfAllocator() is called.
-    void* alloc(size_t bytes) {
-        void* data = malloc(bytes);
-        fHandles.push(data);
-        fSizeInBytes += bytes;
-        return data;
-    }
-
-    // Returns the number of bytes used in this allocator.
-    size_t bytesUsed() const {
-        return fSizeInBytes;
-    }
-
-private:
-    SkTDArray<SkPdfNativeObject*> fHistory;
-    SkTDArray<void*> fHandles;
-    SkPdfNativeObject* fCurrent;
-    int fCurrentUsed;
-
-    SkPdfNativeObject* allocBlock();
-    size_t fSizeInBytes;
-};
-
-// Type of a parsed token.
-enum SkPdfTokenType {
-    kKeyword_TokenType,
-    kObject_TokenType,
-};
-
-
-/** \struct PdfToken
- *
- *   Stores the result of the parsing - a keyword or an object.
- *
- */
-struct PdfToken {
-    const char*             fKeyword;
-    size_t                  fKeywordLength;
-    SkPdfNativeObject*      fObject;
-    SkPdfTokenType          fType;
-
-    PdfToken() : fKeyword(NULL), fKeywordLength(0), fObject(NULL) {}
-};
-
-/** \class SkPdfNativeTokenizer
- *
- *   Responsible to tokenize a stream in small tokens, eityh a keyword or an object.
- *   A renderer can feed on the tokens and render a pdf.
- *
- */
-class SkPdfNativeTokenizer {
-public:
-    SkPdfNativeTokenizer(SkPdfNativeObject* objWithStream,
-                         SkPdfAllocator* allocator, SkPdfNativeDoc* doc);
-    SkPdfNativeTokenizer(const unsigned char* buffer, int len,
-                         SkPdfAllocator* allocator, SkPdfNativeDoc* doc);
-
-    virtual ~SkPdfNativeTokenizer();
-
-    // Reads one token. Returns false if there are no more tokens.
-    // If writeDiff is true, and a token was read, create a PNG highlighting
-    // the difference caused by this command in /tmp/log_step_by_step.
-    // If PDF_TRACE_DIFF_IN_PNG is not defined, writeDiff does nothing.
-    bool readToken(PdfToken* token, bool writeDiff = false);
-
-    // Put back a token to be read in the nextToken read. Only one token is allowed to be put
-    // back. Must not necesaarely be the last token read.
-    void PutBack(PdfToken token);
-
-    // Reads the inline image that is present in the stream. At this point we just consumed the ID
-    // token already.
-    SkPdfImageDictionary* readInlineImage();
-
-private:
-    bool readTokenCore(PdfToken* token);
-
-    SkPdfNativeDoc* fDoc;
-    SkPdfAllocator* fAllocator;
-
-    const unsigned char* fUncompressedStreamStart;
-    const unsigned char* fUncompressedStream;
-    const unsigned char* fUncompressedStreamEnd;
-
-    bool fEmpty;
-    bool fHasPutBack;
-    PdfToken fPutBack;
-};
-
-const unsigned char* nextObject(const unsigned char* start, const unsigned char* end,
-                                SkPdfNativeObject* token,
-                                SkPdfAllocator* allocator,
-                                SkPdfNativeDoc* doc);
-
-#endif  // SkPdfNativeTokenizer_DEFINED