The Tor Browser: gfx/skia/trunk/include/core/SkReader32.h@129ffea94266 (annotated)

gfx/skia/trunk/include/core/SkReader32.h@129ffea94266 (annotated)

gfx/skia/trunk/include/core/SkReader32.h

Sat, 03 Jan 2015 20:18:00 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Sat, 03 Jan 2015 20:18:00 +0100
branch: TOR_BUG_3246
changeset 7: 129ffea94266
permissions: -rw-r--r--

Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.

 /*
  * Copyright 2008 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.
  */
 #ifndef SkReader32_DEFINED
 #define SkReader32_DEFINED
 #include "SkMatrix.h"
 #include "SkPath.h"
 #include "SkRegion.h"
 #include "SkRRect.h"
 #include "SkScalar.h"
 class SkString;
 class SkReader32 : SkNoncopyable {
 public:
     SkReader32() : fCurr(NULL), fStop(NULL), fBase(NULL) {}
     SkReader32(const void* data, size_t size)  {
         this->setMemory(data, size);
     }
     void setMemory(const void* data, size_t size) {
         SkASSERT(ptr_align_4(data));
         SkASSERT(SkAlign4(size) == size);
         fBase = fCurr = (const char*)data;
         fStop = (const char*)data + size;
     }
     uint32_t size() const { return SkToU32(fStop - fBase); }
     uint32_t offset() const { return SkToU32(fCurr - fBase); }
     bool eof() const { return fCurr >= fStop; }
     const void* base() const { return fBase; }
     const void* peek() const { return fCurr; }
     uint32_t available() const { return SkToU32(fStop - fCurr); }
     bool isAvailable(uint32_t size) const { return fCurr + size <= fStop; }
     void rewind() { fCurr = fBase; }
     void setOffset(size_t offset) {
         SkASSERT(SkAlign4(offset) == offset);
         SkASSERT(offset <= this->size());
         fCurr = fBase + offset;
     }
     bool readBool() { return this->readInt() != 0; }
     int32_t readInt() {
         SkASSERT(ptr_align_4(fCurr));
         int32_t value = *(const int32_t*)fCurr;
         fCurr += sizeof(value);
         SkASSERT(fCurr <= fStop);
         return value;
     }
     void* readPtr() {
         void* ptr;
         // we presume this "if" is resolved at compile-time
         if (4 == sizeof(void*)) {
             ptr = *(void**)fCurr;
         } else {
             memcpy(&ptr, fCurr, sizeof(void*));
         }
         fCurr += sizeof(void*);
         return ptr;
     }
     SkScalar readScalar() {
         SkASSERT(ptr_align_4(fCurr));
         SkScalar value = *(const SkScalar*)fCurr;
         fCurr += sizeof(value);
         SkASSERT(fCurr <= fStop);
         return value;
     }
     const void* skip(size_t size) {
         SkASSERT(ptr_align_4(fCurr));
         const void* addr = fCurr;
         fCurr += SkAlign4(size);
         SkASSERT(fCurr <= fStop);
         return addr;
     }
     template <typename T> const T& skipT() {
         SkASSERT(SkAlign4(sizeof(T)) == sizeof(T));
         return *(const T*)this->skip(sizeof(T));
     }
     void read(void* dst, size_t size) {
         SkASSERT(0 == size || dst != NULL);
         SkASSERT(ptr_align_4(fCurr));
         memcpy(dst, fCurr, size);
         fCurr += SkAlign4(size);
         SkASSERT(fCurr <= fStop);
     }
     uint8_t readU8() { return (uint8_t)this->readInt(); }
     uint16_t readU16() { return (uint16_t)this->readInt(); }
     int32_t readS32() { return this->readInt(); }
     uint32_t readU32() { return this->readInt(); }
     bool readPath(SkPath* path) {
         return readObjectFromMemory(path);
     }
     bool readMatrix(SkMatrix* matrix) {
         return readObjectFromMemory(matrix);
     }
     bool readRRect(SkRRect* rrect) {
         return readObjectFromMemory(rrect);
     }
     bool readRegion(SkRegion* rgn) {
         return readObjectFromMemory(rgn);
     }
     /**
      *  Read the length of a string (written by SkWriter32::writeString) into
      *  len (if len is not NULL) and return the null-ternimated address of the
      *  string within the reader's buffer.
      */
     const char* readString(size_t* len = NULL);
     /**
      *  Read the string (written by SkWriter32::writeString) and return it in
      *  copy (if copy is not null). Return the length of the string.
      */
     size_t readIntoString(SkString* copy);
 private:
     template <typename T> bool readObjectFromMemory(T* obj) {
         size_t size = obj->readFromMemory(this->peek(), this->available());
         // If readFromMemory() fails (which means that available() was too small), it returns 0
         bool success = (size > 0) && (size <= this->available()) && (SkAlign4(size) == size);
         // In case of failure, we want to skip to the end
         (void)this->skip(success ? size : this->available());
         return success;
     }
     // these are always 4-byte aligned
     const char* fCurr;  // current position within buffer
     const char* fStop;  // end of buffer
     const char* fBase;  // beginning of buffer
 #ifdef SK_DEBUG
     static bool ptr_align_4(const void* ptr) {
         return (((const char*)ptr - (const char*)NULL) & 3) == 0;
     }
 #endif
 };
 #endif

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gfx/skia/trunk/include/core/SkReader32.h@129ffea94266 (annotated)

gfx/skia/trunk/include/core/SkReader32.h