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51 #ifndef _compressed_pstring_h
52 #define _compressed_pstring_h 1
54 #include "object/pstring.h"
55 #include "compression/abs_agent.h"
57 /***************************************
58 * compressed string class.
59 ****************************************/
61 class compressed_pstring: public pstring
67 static buffer* v_cp_io_buf_ptr;
68 static buffer* working_buffer_ptr;
70 static buffer v_cp_io_buf;
71 static buffer working_buffer;
74 oid_t compress_agent_id;
76 compress_agent_handler* agent;
78 unsigned int v_uncompressed_sz;
84 compressed_pstring(c_code_t = COMPRESSED_STRING_CODE);
85 virtual ~compressed_pstring();
87 // get uncompresed version
89 char* get(buffer& optional_buffer = *v_cp_io_buf_ptr);
91 char* get(buffer& optional_buffer = v_cp_io_buf);
94 int size() const; // get uncompressed data size
96 MMDB_SIGNATURES(compressed_pstring);
99 virtual io_status _asciiIn(istream&) ; // read in string part
100 virtual io_status _asciiIn(const char* buf, int size) ;
102 virtual io_status asciiIn(istream&) ; // read in compress agent id and then
103 virtual io_status asciiIn(const char* buf, int size, const oid_t&) ;
104 virtual io_status asciiIn(const char* buf, int size) ;
106 // compacted disk representation In and Out functions
107 virtual int cdr_sizeof();
108 virtual io_status cdrOut(buffer&);
109 virtual io_status cdrIn(buffer&);
111 friend class compressed_pstring_handler;
114 friend void initialize_MMDB();
115 friend void quit_MMDB();
122 HANDLER_SIGNATURES(compressed_pstring)