129 lines
No EOL
3.1 KiB
C++
129 lines
No EOL
3.1 KiB
C++
#ifndef _rrdata__hpp__included__
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#define _rrdata__hpp__included__
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#define RRDATA_BYTES 32
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#include <cstdint>
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#include <stdexcept>
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#include <vector>
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/**
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* Set of load IDs
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*/
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class rrdata
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{
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public:
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/**
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* One load ID.
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*/
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struct instance
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{
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/**
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* Create new random load ID.
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*
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* throws std::bad_alloc: Not enough memory
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*/
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instance() throw(std::bad_alloc);
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/**
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* Create new load id from bytes.
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*
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* parameter b: 32 byte array containing the new ID.
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*/
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instance(unsigned char* b) throw();
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/**
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* The load ID.
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*/
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unsigned char bytes[RRDATA_BYTES];
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/**
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* Is this ID before another one?
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*
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* parameter i: Another ID.
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* returns: True if this ID is before another one, false otherwise.
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*/
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bool operator<(const struct instance& i) const throw();
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/**
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* Is this ID equal to another one?
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*
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* parameter i: Another ID.
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* returns: True if this ID is equal to another one, false otherwise.
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*/
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bool operator==(const struct instance& i) const throw();
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/**
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* Increment this ID.
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*
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* returns: Copy of the ID before the increment.
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*/
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const struct instance operator++(int) throw();
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/**
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* Increment this ID.
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*
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* returns: Reference to this.
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*/
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struct instance& operator++() throw();
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};
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/**
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* Read the saved set of load IDs for specified project and switch to that project.
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*
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* parameter project: The name of project.
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* throws std::bad_alloc: Not enough memory
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*/
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static void read_base(const std::string& project) throw(std::bad_alloc);
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/**
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* Switch to no project, closing the load IDs.
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*/
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static void close() throw();
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/**
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* Add new specified instance to current project.
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*
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* Not allowed if there is no project open.
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*
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* parameter i: The load ID to add.
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*/
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static void add(const struct instance& i) throw(std::bad_alloc);
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/**
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* Generate new load ID and add it to the current proejct.
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*
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* Not allowed if there is no project open.
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*
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* throws std::bad_alloc: Not enough memory.
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*/
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static void add_internal() throw(std::bad_alloc);
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/**
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* Write compressed representation of current load ID set to stream.
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*
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* parameter strm: The stream to write to.
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* returns: Rerecord count.
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* throws std::bad_alloc: Not enough memory.
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*/
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static uint64_t write(std::vector<char>& strm) throw(std::bad_alloc);
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/**
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* Load compressed representation of load ID set from stream and union it with current set to form new current
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* set.
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*
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* parameter strm: The stream to read from.
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* returns: Rerecord count.
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* throws std::bad_alloc: Not enough memory.
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*/
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static uint64_t read(std::vector<char>& strm, bool dummy = false) throw(std::bad_alloc);
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/**
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* Load compressed representation of load ID set from stream, but don't do anything to it.
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*
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* parameter strm: The stream to read from.
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* returns: Rerecord count.
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* throws std::bad_alloc: Not enough memory.
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*/
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static uint64_t count(std::vector<char>& strm) throw(std::bad_alloc);
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/**
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* Internal pointer used by add_internal.
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*/
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static struct instance* internal;
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};
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/**
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* Print load ID. Mainly useful for deubugging.
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*
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* parameter os: Stream to print to.
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* parameter i: load ID to print.
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*/
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std::ostream& operator<<(std::ostream& os, const struct rrdata::instance& i);
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#endif |