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files.h

    00001 #ifndef CRYPTOPP_FILES_H
    00002 #define CRYPTOPP_FILES_H
    00003
    00004 #include "cryptlib.h"
    00005 #include "filters.h"
    00006 #include "argnames.h"
    00007
    00008 #include <iostream>
    00009 #include <fstream>
    00010
    00011 NAMESPACE_BEGIN(CryptoPP)
    00012
    00013 //! file-based implementation of Store interface
    00014 class CRYPTOPP_DLL FileStore : public Store, private FilterPutSpaceHelper, public NotCopyable
    00015 {
    00016 public:
    00017     class Err : public Exception
    00018     {
    00019     public:
    00020         Err(const std::string &s) : Exception(IO_ERROR, s) {}
    00021     };
    00022     class OpenErr : public Err {public: OpenErr(const std::string &filename) : Err("FileStore: error opening file for reading: " + filename) {}};
    00023     class ReadErr : public Err {public: ReadErr() : Err("FileStore: error reading file") {}};
    00024
    00025     FileStore() : m_stream(NULL) {}
    00026     FileStore(std::istream &in)
    00027         {StoreInitialize(MakeParameters(Name::InputStreamPointer(), &in));}
    00028     FileStore(const char *filename)
    00029         {StoreInitialize(MakeParameters(Name::InputFileName(), filename));}
    00030 #if defined(CRYPTOPP_UNIX_AVAILABLE) || _MSC_VER >= 1400
    00031     //! specify file with Unicode name. On non-Windows OS, this function assumes that setlocale() has been called.
    00032     FileStore(const wchar_t *filename)
    00033         {StoreInitialize(MakeParameters(Name::InputFileNameWide(), filename));}
    00034 #endif
    00035
    00036     std::istream* GetStream() {return m_stream;}
    00037
    00038     lword MaxRetrievable() const;
    00039     size_t TransferTo2(BufferedTransformation &target, lword &transferBytes, const std::string &channel=DEFAULT_CHANNEL, bool blocking=true);
    00040     size_t CopyRangeTo2(BufferedTransformation &target, lword &begin, lword end=LWORD_MAX, const std::string &channel=DEFAULT_CHANNEL, bool blocking=true) const;
    00041     lword Skip(lword skipMax=ULONG_MAX);
    00042
    00043 private:
    00044     void StoreInitialize(const NameValuePairs &parameters);
    00045
    00046     member_ptr<std::ifstream> m_file;
    00047     std::istream *m_stream;
    00048     byte *m_space;
    00049     size_t m_len;
    00050     bool m_waiting;
    00051 };
    00052
    00053 //! file-based implementation of Source interface
    00054 class CRYPTOPP_DLL FileSource : public SourceTemplate<FileStore>
    00055 {
    00056 public:
    00057     typedef FileStore::Err Err;
    00058     typedef FileStore::OpenErr OpenErr;
    00059     typedef FileStore::ReadErr ReadErr;
    00060
    00061     FileSource(BufferedTransformation *attachment = NULL)
    00062         : SourceTemplate<FileStore>(attachment) {}
    00063     FileSource(std::istream &in, bool pumpAll, BufferedTransformation *attachment = NULL)
    00064         : SourceTemplate<FileStore>(attachment) {SourceInitialize(pumpAll, MakeParameters(Name::InputStreamPointer(), &in));}
    00065     FileSource(const char *filename, bool pumpAll, BufferedTransformation *attachment = NULL, bool binary=true)
    00066         : SourceTemplate<FileStore>(attachment) {SourceInitialize(pumpAll, MakeParameters(Name::InputFileName(), filename)(Name::InputBinaryMode(), binary));}
    00067 #if defined(CRYPTOPP_UNIX_AVAILABLE) || _MSC_VER >= 1400
    00068     //! specify file with Unicode name. On non-Windows OS, this function assumes that setlocale() has been called.
    00069     FileSource(const wchar_t *filename, bool pumpAll, BufferedTransformation *attachment = NULL, bool binary=true)
    00070         : SourceTemplate<FileStore>(attachment) {SourceInitialize(pumpAll, MakeParameters(Name::InputFileNameWide(), filename)(Name::InputBinaryMode(), binary));}
    00071 #endif
    00072
    00073     std::istream* GetStream() {return m_store.GetStream();}
    00074 };
    00075
    00076 //! file-based implementation of Sink interface
    00077 class CRYPTOPP_DLL FileSink : public Sink, public NotCopyable
    00078 {
    00079 public:
    00080     class Err : public Exception
    00081     {
    00082     public:
    00083         Err(const std::string &s) : Exception(IO_ERROR, s) {}
    00084     };
    00085     class OpenErr : public Err {public: OpenErr(const std::string &filename) : Err("FileSink: error opening file for writing: " + filename) {}};
    00086     class WriteErr : public Err {public: WriteErr() : Err("FileSink: error writing file") {}};
    00087
    00088     FileSink() : m_stream(NULL) {}
    00089     FileSink(std::ostream &out)
    00090         {IsolatedInitialize(MakeParameters(Name::OutputStreamPointer(), &out));}
    00091     FileSink(const char *filename, bool binary=true)
    00092         {IsolatedInitialize(MakeParameters(Name::OutputFileName(), filename)(Name::OutputBinaryMode(), binary));}
    00093 #if defined(CRYPTOPP_UNIX_AVAILABLE) || _MSC_VER >= 1400
    00094     //! specify file with Unicode name. On non-Windows OS, this function assumes that setlocale() has been called.
    00095     FileSink(const wchar_t *filename, bool binary=true)
    00096         {IsolatedInitialize(MakeParameters(Name::OutputFileNameWide(), filename)(Name::OutputBinaryMode(), binary));}
    00097 #endif
    00098
    00099     std::ostream* GetStream() {return m_stream;}
    00100
    00101     void IsolatedInitialize(const NameValuePairs &parameters);
    00102     size_t Put2(const byte *inString, size_t length, int messageEnd, bool blocking);
    00103     bool IsolatedFlush(bool hardFlush, bool blocking);
    00104
    00105 private:
    00106     member_ptr<std::ofstream> m_file;
    00107     std::ostream *m_stream;
    00108 };
    00109
    00110 NAMESPACE_END
    00111
    00112 #endif