MunGenUid.hpp

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#ifndef __MUN_GEN_UID_HPP__
#define __MUN_GEN_UID_HPP__

#include <string>
#include <mrs.hpp>

class   MunGenUid
{
public:
    static  uint64      GetUid64( std::string host, uint16 port ) {
        // 「ホスト名:ポート番号」の文字列化
        char    str[64];
        ::snprintf( str, sizeof(str), "%s:%d", host.c_str(), port );
        uint32  len = strlen(str);
        
        // FNV-1アルゴリズムによるハッシュ値の取得
        uint64  base64  = 14695981039346656037U;
#ifdef _WIN32
        uint64  prime64 = 1099511628211ULL;
#else
        uint64  prime64 = 1099511628211LLU;
#endif /* _WIN32 */
        uint64  hash = base64;
        for( uint32 i = 0; i < len; i++ ) {
            hash = (prime64 * hash) ^ (str[i]);
        }
        
        return  hash;
    }
    
    static  uint32      GetUid32( std::string host, uint16 port ) {
        // 「ホスト名:ポート番号」の文字列化
        char    str[64];
        ::snprintf( str, sizeof(str), "%s:%d", host.c_str(), port );
        uint32  len = strlen(str);
        
        // FNV-1アルゴリズムによるハッシュ値の取得
        uint32  base32  = 2166136261U;
        uint32  prime32 = 16777619U;
        uint32  hash = base32;
        for( uint32 i = 0; i < len; i++ ) {
            hash = (prime32 * hash) ^ (str[i]);
        }
        
        return  hash;
    }
};

#endif  /* __MUN_GEN_PID_FILE_HPP__ */