hphp/runtime/base/variable_unserializer.cpp

   1 /*
   2    +----------------------------------------------------------------------+
   3    | HipHop for PHP                                                       |
   4    +----------------------------------------------------------------------+
   5    | Copyright (c) 2010-2013 Facebook, Inc. (http://www.facebook.com)     |
   6    | Copyright (c) 1998-2010 Zend Technologies Ltd. (http://www.zend.com) |
   7    +----------------------------------------------------------------------+
   8    | This source file is subject to version 2.00 of the Zend license,     |
   9    | that is bundled with this package in the file LICENSE, and is        |
  10    | available through the world-wide-web at the following url:           |
  11    | http://www.zend.com/license/2_00.txt.                                |
  12    | If you did not receive a copy of the Zend license and are unable to  |
  13    | obtain it through the world-wide-web, please send a note to          |
  14    | license@zend.com so we can mail you a copy immediately.              |
  15    +----------------------------------------------------------------------+
  16 */
  17
  18 #include "hphp/runtime/base/variable_unserializer.h"
  19 #include "hphp/runtime/base/complex_types.h"
  20 #include "hphp/runtime/base/zend-strtod.h"
  21 #include "hphp/runtime/base/array_iterator.h"
  22 #include "hphp/runtime/ext/ext_class.h"
  23
  24 namespace HPHP {
  25 ///////////////////////////////////////////////////////////////////////////////
  26
  27 Variant VariableUnserializer::unserialize() {
  28   Variant v;
  29   v.unserialize(this);
  30   return v;
  31 }
  32
  33 Variant VariableUnserializer::unserializeKey() {
  34   Variant v;
  35   v.unserialize(this, Uns::Mode::Key);
  36   return v;
  37 }
  38
  39 int64_t VariableUnserializer::readInt() {
  40   check();
  41   char *newBuf;
  42   int64_t r = strtoll(m_buf, &newBuf, 10);
  43   m_buf = newBuf;
  44   return r;
  45 }
  46
  47 double VariableUnserializer::readDouble() {
  48   check();
  49   char *newBuf;
  50   double r = zend_strtod(m_buf, &newBuf);
  51   m_buf = newBuf;
  52   return r;
  53 }
  54
  55 void VariableUnserializer::read(char *buf, uint n) {
  56   check();
  57
  58   /* compute copy boundaries in a more efficient manner,
  59      by using min(...) operation rather than complex conditional
  60      in a loop guard */
  61   const size_t BUFFER_SIZE = m_end - m_buf;
  62   const size_t BUFFER_LIMIT = std::min(BUFFER_SIZE, size_t(n));
  63
  64   memcpy(buf, m_buf, BUFFER_LIMIT);
  65   m_buf += BUFFER_LIMIT;
  66 }
  67
  68 Variant &VariableUnserializer::addVar() {
  69   m_vars.push_back(uninit_null());
  70   return m_vars.back();
  71 }
  72
  73 bool VariableUnserializer::isWhitelistedClass(CStrRef cls_name) const {
  74   if (m_type != Type::Serialize || m_classWhiteList.isNull()) {
  75     return true;
  76   }
  77   if (!m_classWhiteList.isNull() && !m_classWhiteList.empty()) {
  78     for (ArrayIter iter(m_classWhiteList); iter; ++iter) {
  79       CVarRef value(iter.secondRef());
  80       if (f_is_subclass_of(cls_name, value.toString()) ||
  81           same(value, cls_name)) {
  82         return true;
  83       }
  84     }
  85   }
  86   return false;
  87 }
  88
  89 ///////////////////////////////////////////////////////////////////////////////
  90 }