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https://opencores.org/ocsvn/openrisc/openrisc/trunk
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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [zlib/] [contrib/] [iostream/] [zfstream.cpp] - Rev 746
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#include "zfstream.h" gzfilebuf::gzfilebuf() : file(NULL), mode(0), own_file_descriptor(0) { } gzfilebuf::~gzfilebuf() { sync(); if ( own_file_descriptor ) close(); } gzfilebuf *gzfilebuf::open( const char *name, int io_mode ) { if ( is_open() ) return NULL; char char_mode[10]; char *p = char_mode; if ( io_mode & ios::in ) { mode = ios::in; *p++ = 'r'; } else if ( io_mode & ios::app ) { mode = ios::app; *p++ = 'a'; } else { mode = ios::out; *p++ = 'w'; } if ( io_mode & ios::binary ) { mode |= ios::binary; *p++ = 'b'; } // Hard code the compression level if ( io_mode & (ios::out|ios::app )) { *p++ = '9'; } // Put the end-of-string indicator *p = '\0'; if ( (file = gzopen(name, char_mode)) == NULL ) return NULL; own_file_descriptor = 1; return this; } gzfilebuf *gzfilebuf::attach( int file_descriptor, int io_mode ) { if ( is_open() ) return NULL; char char_mode[10]; char *p = char_mode; if ( io_mode & ios::in ) { mode = ios::in; *p++ = 'r'; } else if ( io_mode & ios::app ) { mode = ios::app; *p++ = 'a'; } else { mode = ios::out; *p++ = 'w'; } if ( io_mode & ios::binary ) { mode |= ios::binary; *p++ = 'b'; } // Hard code the compression level if ( io_mode & (ios::out|ios::app )) { *p++ = '9'; } // Put the end-of-string indicator *p = '\0'; if ( (file = gzdopen(file_descriptor, char_mode)) == NULL ) return NULL; own_file_descriptor = 0; return this; } gzfilebuf *gzfilebuf::close() { if ( is_open() ) { sync(); gzclose( file ); file = NULL; } return this; } int gzfilebuf::setcompressionlevel( int comp_level ) { return gzsetparams(file, comp_level, -2); } int gzfilebuf::setcompressionstrategy( int comp_strategy ) { return gzsetparams(file, -2, comp_strategy); } streampos gzfilebuf::seekoff( streamoff off, ios::seek_dir dir, int which ) { return streampos(EOF); } int gzfilebuf::underflow() { // If the file hasn't been opened for reading, error. if ( !is_open() || !(mode & ios::in) ) return EOF; // if a buffer doesn't exists, allocate one. if ( !base() ) { if ( (allocate()) == EOF ) return EOF; setp(0,0); } else { if ( in_avail() ) return (unsigned char) *gptr(); if ( out_waiting() ) { if ( flushbuf() == EOF ) return EOF; } } // Attempt to fill the buffer. int result = fillbuf(); if ( result == EOF ) { // disable get area setg(0,0,0); return EOF; } return (unsigned char) *gptr(); } int gzfilebuf::overflow( int c ) { if ( !is_open() || !(mode & ios::out) ) return EOF; if ( !base() ) { if ( allocate() == EOF ) return EOF; setg(0,0,0); } else { if (in_avail()) { return EOF; } if (out_waiting()) { if (flushbuf() == EOF) return EOF; } } int bl = blen(); setp( base(), base() + bl); if ( c != EOF ) { *pptr() = c; pbump(1); } return 0; } int gzfilebuf::sync() { if ( !is_open() ) return EOF; if ( out_waiting() ) return flushbuf(); return 0; } int gzfilebuf::flushbuf() { int n; char *q; q = pbase(); n = pptr() - q; if ( gzwrite( file, q, n) < n ) return EOF; setp(0,0); return 0; } int gzfilebuf::fillbuf() { int required; char *p; p = base(); required = blen(); int t = gzread( file, p, required ); if ( t <= 0) return EOF; setg( base(), base(), base()+t); return t; } gzfilestream_common::gzfilestream_common() : ios( gzfilestream_common::rdbuf() ) { } gzfilestream_common::~gzfilestream_common() { } void gzfilestream_common::attach( int fd, int io_mode ) { if ( !buffer.attach( fd, io_mode) ) clear( ios::failbit | ios::badbit ); else clear(); } void gzfilestream_common::open( const char *name, int io_mode ) { if ( !buffer.open( name, io_mode ) ) clear( ios::failbit | ios::badbit ); else clear(); } void gzfilestream_common::close() { if ( !buffer.close() ) clear( ios::failbit | ios::badbit ); } gzfilebuf *gzfilestream_common::rdbuf() { return &buffer; } gzifstream::gzifstream() : ios( gzfilestream_common::rdbuf() ) { clear( ios::badbit ); } gzifstream::gzifstream( const char *name, int io_mode ) : ios( gzfilestream_common::rdbuf() ) { gzfilestream_common::open( name, io_mode ); } gzifstream::gzifstream( int fd, int io_mode ) : ios( gzfilestream_common::rdbuf() ) { gzfilestream_common::attach( fd, io_mode ); } gzifstream::~gzifstream() { } gzofstream::gzofstream() : ios( gzfilestream_common::rdbuf() ) { clear( ios::badbit ); } gzofstream::gzofstream( const char *name, int io_mode ) : ios( gzfilestream_common::rdbuf() ) { gzfilestream_common::open( name, io_mode ); } gzofstream::gzofstream( int fd, int io_mode ) : ios( gzfilestream_common::rdbuf() ) { gzfilestream_common::attach( fd, io_mode ); } gzofstream::~gzofstream() { }
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