Home | History | Annotate | Download | only in processor
      1 // Copyright (c) 2010, Google Inc.
      2 // All rights reserved.
      3 //
      4 // Redistribution and use in source and binary forms, with or without
      5 // modification, are permitted provided that the following conditions are
      6 // met:
      7 //
      8 //     * Redistributions of source code must retain the above copyright
      9 // notice, this list of conditions and the following disclaimer.
     10 //     * Redistributions in binary form must reproduce the above
     11 // copyright notice, this list of conditions and the following disclaimer
     12 // in the documentation and/or other materials provided with the
     13 // distribution.
     14 //     * Neither the name of Google Inc. nor the names of its
     15 // contributors may be used to endorse or promote products derived from
     16 // this software without specific prior written permission.
     17 //
     18 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     19 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     20 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     21 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     22 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     23 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     24 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     28 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29 
     30 // binarystream implements part of the std::iostream interface as a
     31 // wrapper around std::stringstream to allow reading and writing strings
     32 // and integers of known size.
     33 
     34 #ifndef GOOGLE_BREAKPAD_PROCESSOR_BINARYSTREAM_H_
     35 #define GOOGLE_BREAKPAD_PROCESSOR_BINARYSTREAM_H_
     36 
     37 #include <sstream>
     38 #include <string>
     39 
     40 #include "common/using_std_string.h"
     41 #include "google_breakpad/common/breakpad_types.h"
     42 
     43 namespace google_breakpad {
     44 using std::ios_base;
     45 using std::ios;
     46 
     47 class binarystream {
     48  public:
     49   explicit binarystream(ios_base::openmode which = ios_base::out|ios_base::in)
     50     : stream_(which) {}
     51   explicit binarystream(const string &str,
     52                         ios_base::openmode which = ios_base::out|ios_base::in)
     53     : stream_(str, which) {}
     54   explicit binarystream(const char *str, size_t size,
     55                         ios_base::openmode which = ios_base::out|ios_base::in)
     56     : stream_(string(str, size), which) {}
     57 
     58   binarystream &operator>>(string &str);
     59   binarystream &operator>>(uint8_t &u8);
     60   binarystream &operator>>(uint16_t &u16);
     61   binarystream &operator>>(uint32_t &u32);
     62   binarystream &operator>>(uint64_t &u64);
     63 
     64   // Note: strings are truncated at 65535 characters
     65   binarystream &operator<<(const string &str);
     66   binarystream &operator<<(uint8_t u8);
     67   binarystream &operator<<(uint16_t u16);
     68   binarystream &operator<<(uint32_t u32);
     69   binarystream &operator<<(uint64_t u64);
     70 
     71   // Forward a few methods directly from the stream object
     72   bool eof() const { return stream_.eof(); }
     73   void clear() { stream_.clear(); }
     74   string str() const { return stream_.str(); }
     75   void str(const string &s) { stream_.str(s); }
     76 
     77   // Seek both read and write pointers to the beginning of the stream.
     78   void rewind() {
     79     stream_.seekg (0, ios::beg);
     80     stream_.seekp (0, ios::beg);
     81     // This is to clear all the error flags, since only the EOF flag is cleared
     82     // with seekg().
     83     stream_.clear();
     84   }
     85 
     86  private:
     87   std::stringstream stream_;
     88 };
     89 
     90 }  // namespace google_breakpad
     91 
     92 #endif  // GOOGLE_BREAKPAD_PROCESSOR_BINARYSTREAM_H_
     93