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/*
* ASN.1 OID
* (C) 1999-2007 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#ifndef BOTAN_ASN1_OID_H__
#define BOTAN_ASN1_OID_H__
#include <botan/asn1_obj.h>
#include <string>
#include <vector>
namespace Botan {
/**
* This class represents ASN.1 object identifiers.
*/
class BOTAN_DLL OID : public ASN1_Object
{
public:
void encode_into(class DER_Encoder&) const;
void decode_from(class BER_Decoder&);
/**
* Find out whether this OID is empty
* @return true is no OID value is set
*/
bool empty() const { return id.size() == 0; }
/**
* Get this OID as list (vector) of its components.
* @return vector representing this OID
*/
const std::vector<u32bit>& get_id() const { return id; }
/**
* Get this OID as a string
* @return string representing this OID
*/
std::string as_string() const;
/**
* Compare two OIDs.
* @return true if they are equal, false otherwise
*/
bool operator==(const OID&) const;
/**
* Reset this instance to an empty OID.
*/
void clear();
/**
* Add a component to this OID.
* @param new_comp the new component to add to the end of this OID
* @return reference to *this
*/
OID& operator+=(u32bit new_comp);
/**
* Construct an OID from a string.
* @param str a string in the form "a.b.c" etc., where a,b,c are numbers
*/
OID(const std::string& str = "");
private:
std::vector<u32bit> id;
};
/**
* Append another component onto the OID.
* @param oid the OID to add the new component to
* @param new_comp the new component to add
*/
OID BOTAN_DLL operator+(const OID& oid, u32bit new_comp);
/**
* Compare two OIDs.
* @param a the first OID
* @param b the second OID
* @return true if a is not equal to b
*/
bool BOTAN_DLL operator!=(const OID& a, const OID& b);
/**
* Compare two OIDs.
* @param a the first OID
* @param b the second OID
* @return true if a is lexicographically smaller than b
*/
bool BOTAN_DLL operator<(const OID& a, const OID& b);
}
#endif
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