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Diffstat (limited to 'ACE/ACEXML/common/FileCharStream.h')
-rw-r--r-- | ACE/ACEXML/common/FileCharStream.h | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/ACE/ACEXML/common/FileCharStream.h b/ACE/ACEXML/common/FileCharStream.h new file mode 100644 index 00000000000..0f3408ae18e --- /dev/null +++ b/ACE/ACEXML/common/FileCharStream.h @@ -0,0 +1,130 @@ +// -*- C++ -*- + +//============================================================================= +/** + * @file FileCharStream.h + * + * $Id$ + * + * @author Nanbor Wang <nanbor@cs.wustl.edu> + */ +//============================================================================= + +#ifndef _ACEXML_FILECHARSTREAM_H_ +#define _ACEXML_FILECHARSTREAM_H_ + +#include /**/ "ace/pre.h" +#include "ACEXML/common/ACEXML_Export.h" + +#if !defined (ACE_LACKS_PRAGMA_ONCE) +#pragma once +#endif /* ACE_LACKS_PRAGMA_ONCE */ + +#include "ACEXML/common/CharStream.h" +#include "ACEXML/common/Encoding.h" + +/** + * @class ACEXML_FileCharStream FileCharStream.h "ACEXML/common/FileCharStream.h" + * + * An implementation of ACEXML_CharStream for reading input from a file. + */ +class ACEXML_Export ACEXML_FileCharStream : public ACEXML_CharStream +{ +public: + /// Default constructor. + ACEXML_FileCharStream (void); + + /// Destructor + virtual ~ACEXML_FileCharStream (void); + + /// Open a file. + int open (const ACEXML_Char *name); + + /** + * Returns the available ACEXML_Char in the buffer. -1 + * if the object is not initialized properly. + */ + virtual int available (void); + + /** + * Close this stream and release all resources used by it. + */ + virtual int close (void); + + /** + * Read the next ACEXML_Char. Return -1 if we are not able to + * return an ACEXML_Char, 0 if succees. + */ + virtual int get (ACEXML_Char& ch); + + /** + * Read the next batch of ACEXML_Char strings + */ + virtual int read (ACEXML_Char *str, + size_t len); + + /** + * Determine the encoding of the file. + */ + virtual int determine_encoding (void); + + + /** + * Peek the next ACEXML_Char in the CharStream. Return the + * character if success, -1 if EOF is reached. + */ + virtual int peek (void); + + /** + * Resets the file pointer to the beginning of the stream. + */ + virtual void rewind (void); + + /* + * Get the character encoding for the file. + */ + virtual const ACEXML_Char *getEncoding (void); + + /* + * Get the systemId for the underlying CharStream + */ + virtual const ACEXML_Char* getSystemId (void); + +private: + + /** Read the next character as a normal character. Return -1 if EOF is + * reached, else return 0. + */ + int getchar_i (char& ch); + +#if defined (ACE_USES_WCHAR) + /** + * Read the next character from the stream taking into account the + * encoding of the file. + */ + int get_i (ACEXML_Char& ch); + + /** + * Read the next character from the stream taking into account the + * encoding of the file. Subsequent call to get() returns this + * character. + */ + int peek_i (void); + +#endif /* ACE_USES_WCHAR */ + + ACEXML_Char* filename_; + ACEXML_Char* encoding_; + off_t size_; + FILE* infile_; + // This is needed to ensure that we can implement a peek operation on a + // UTF-16 encoded file. It is a bit hackish, but there is no other way of + // implementing a peek() as the standard I/O FILE* guarantees only one + // pushback. + ACEXML_Char peek_; +}; + + +#include /**/ "ace/post.h" + +#endif /* _ACEXML_FILECHARSTREAM_H_ */ |