97 lines
2.9 KiB
C++
97 lines
2.9 KiB
C++
// -*- related-file-name: "../../lib/fromfile.cc"; c-basic-offset: 4 -*-
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#ifndef CLICK_FROMFILE_HH
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#define CLICK_FROMFILE_HH
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#include <click/string.hh>
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#include <click/vector.hh>
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#include <stdio.h>
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CLICK_DECLS
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class ErrorHandler;
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class Element;
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class Packet;
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class WritablePacket;
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class FromFile { public:
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FromFile();
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~FromFile() { cleanup(); }
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const String &filename() const { return _filename; }
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String &filename() { return _filename; }
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bool initialized() const { return _fd != -1; }
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void set_landmark_pattern(const String &lp) { _landmark_pattern = lp; }
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String landmark(const String &landmark_pattern) const;
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String landmark() const { return landmark(_landmark_pattern); }
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String print_filename() const;
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int lineno() const { return _lineno; }
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void set_lineno(int lineno) { _lineno = lineno; }
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off_t file_pos() const { return _file_offset + _pos; }
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int configure_keywords(Vector<String>& conf, Element* e, ErrorHandler* errh);
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int set_data(const String& data, ErrorHandler* errh);
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int initialize(ErrorHandler* errh, bool allow_nonexistent = false);
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void add_handlers(Element* e, bool filepos_writable = false) const;
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void cleanup();
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void take_state(FromFile &, ErrorHandler *);
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int seek(off_t want, ErrorHandler *);
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int read(void*, uint32_t, ErrorHandler * = 0);
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const uint8_t* get_unaligned(size_t, void*, ErrorHandler* = 0);
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const uint8_t* get_aligned(size_t, void*, ErrorHandler* = 0);
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String get_string(size_t, ErrorHandler* = 0);
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Packet* get_packet(size_t, uint32_t sec, uint32_t subsec, ErrorHandler *);
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Packet* get_packet_from_data(const void *buf, size_t buf_size, size_t full_size, uint32_t sec, uint32_t subsec, ErrorHandler *);
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void shift_pos(int delta) { _pos += delta; }
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int read_line(String &str, ErrorHandler *errh, bool temporary = false);
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int peek_line(String &str, ErrorHandler *errh, bool temporary = false);
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int error(ErrorHandler *, const char *format, ...) const;
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int warning(ErrorHandler *, const char *format, ...) const;
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private:
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enum { BUFFER_SIZE = 32768 };
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int _fd;
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const uint8_t *_buffer;
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uint32_t _pos;
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uint32_t _len;
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WritablePacket *_data_packet;
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#ifdef ALLOW_MMAP
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bool _mmap;
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#endif
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#ifdef ALLOW_MMAP
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enum { WANT_MMAP_UNIT = 4194304 }; // 4 MB
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size_t _mmap_unit;
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off_t _mmap_off;
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#endif
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String _filename;
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FILE *_pipe;
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off_t _file_offset;
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String _landmark_pattern;
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int _lineno;
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#ifdef ALLOW_MMAP
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int read_buffer_mmap(ErrorHandler *);
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#endif
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int read_buffer(ErrorHandler *);
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bool read_packet(ErrorHandler *);
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int skip_ahead(ErrorHandler *);
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static String filename_handler(Element *, void *);
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static String filesize_handler(Element *, void *);
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static String filepos_handler(Element *, void *);
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static int filepos_write_handler(const String&, Element*, void*, ErrorHandler*);
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};
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CLICK_ENDDECLS
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#endif
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