Gnash 0.8.9

action_buffer.h

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00001 // 
00002 //   Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010,
00003 //   2011 Free Software Foundation, Inc
00004 // 
00005 // This program is free software; you can redistribute it and/or modify
00006 // it under the terms of the GNU General Public License as published by
00007 // the Free Software Foundation; either version 3 of the License, or
00008 // (at your option) any later version.
00009 // 
00010 // This program is distributed in the hope that it will be useful,
00011 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00012 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00013 // GNU General Public License for more details.
00014 // 
00015 // You should have received a copy of the GNU General Public License
00016 // along with this program; if not, write to the Free Software
00017 // Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
00018 
00019 #ifndef GNASH_ACTION_BUFFER_H
00020 #define GNASH_ACTION_BUFFER_H
00021 
00022 #include <string>
00023 #include <vector> 
00024 #include <boost/noncopyable.hpp>
00025 #include <boost/cstdint.hpp> 
00026 
00027 #include "GnashException.h"
00028 #include "log.h"
00029 
00030 // Forward declarations
00031 namespace gnash {
00032         class as_environment;
00033         class as_value;
00034         class movie_definition;
00035         class SWFStream; // for read signature
00036 }
00037 
00038 namespace gnash {
00039 
00041 //
00046 //
00048 class action_buffer : boost::noncopyable
00049 {
00050 public:
00051 
00052         action_buffer(const movie_definition& md);
00053 
00055         //
00062         void read(SWFStream& in, unsigned long endPos);
00063 
00064         size_t size() const { return m_buffer.size(); }
00065 
00066         boost::uint8_t operator[] (size_t off) const
00067         {
00068                 if (off >= m_buffer.size()) {
00069                     throw ActionParserException (_("Attempt to read outside "
00070                                     "action buffer"));
00071                 }
00072                 return m_buffer[off];
00073         }
00074 
00076         std::string disasm(size_t pc) const;
00077 
00079         //
00082         const char* read_string(size_t pc) const
00083         {
00084                 assert(pc <= m_buffer.size() );
00085         if (pc == m_buffer.size())
00086         {
00087             throw ActionParserException(_("Asked to read string when only "
00088                 "1 byte remains in the buffer"));
00089         }
00090                 return reinterpret_cast<const char*>(&m_buffer[pc]);
00091         }
00092 
00094         const unsigned char* getFramePointer(size_t pc) const
00095         {
00096             assert (pc < m_buffer.size());
00097                 return reinterpret_cast<const unsigned char*>(&m_buffer.at(pc));
00098         }
00099 
00101         //
00104         boost::int16_t read_int16(size_t pc) const
00105         {
00106             if (pc + 1 >= m_buffer.size()) {
00107                 throw ActionParserException(_("Attempt to read outside action buffer limits"));
00108             }
00109                 boost::int16_t ret = (m_buffer[pc] | (m_buffer[pc + 1] << 8));
00110                 return ret;
00111         }
00112 
00115         boost::uint16_t read_uint16(size_t pc) const
00116         {
00117                 return static_cast<boost::uint16_t>(read_int16(pc));
00118         }
00119 
00121         //
00124         boost::int32_t read_int32(size_t pc) const
00125         {
00126                 if (pc + 3 >= m_buffer.size()) {
00127                 throw ActionParserException(_("Attempt to read outside action buffer limits"));
00128             }
00129             
00130                 boost::int32_t  val = m_buffer[pc]
00131                       | (m_buffer[pc + 1] << 8)
00132                       | (m_buffer[pc + 2] << 16)
00133                       | (m_buffer[pc + 3] << 24);
00134                 return val;
00135         }
00136 
00138         //
00141         float read_float_little(size_t pc) const;
00142 
00144         //
00148         double read_double_wacky(size_t pc) const;
00149 
00151         size_t dictionary_size() const
00152         {
00153                 return m_dictionary.size();
00154         }
00155 
00157         const char* dictionary_get(size_t n) const
00158         {
00159             assert (n < m_dictionary.size());
00160                 return m_dictionary[n];
00161         }
00162 
00164         //
00185         void process_decl_dict(size_t start_pc, size_t stop_pc) const;
00186 
00188         const std::string& getDefinitionURL() const;
00189 
00191         int getDefinitionVersion() const;
00192 
00193     const movie_definition& getMovieDefinition() const {
00194         return _src;
00195     }
00196 
00197 private:
00198 
00200         std::vector<boost::uint8_t> m_buffer;
00201 
00203         mutable std::vector<const char*> m_dictionary;
00204 
00206         mutable int m_decl_dict_processed_at;
00207 
00209         //
00213         const movie_definition& _src;
00214 };
00215 
00216 
00217 }       // end namespace gnash
00218 
00219 
00220 #endif // GNASH_ACTION_BUFFER_H
00221 
00222 
00223 // Local Variables:
00224 // mode: C++
00225 // indent-tabs-mode: t
00226 // End: