cliproto_8h-source.html

FastDb是高效的内存数据库系统

00142 
00143 <span class="keyword">inline</span> <span class="keywordtype">void</span> pack2(int2&amp; val) { 
00144 <span class="preprocessor">#if BYTE_ORDER != BIG_ENDIAN</span>
00145 <span class="preprocessor"></span><span class="preprocessor">#ifdef USE_HTON_NTOH</span>
00146 <span class="preprocessor"></span>    val = htons(val);
00147 <span class="preprocessor">#else</span>
00148 <span class="preprocessor"></span>    pack2((<span class="keywordtype">char</span>*)&amp;val, val); 
00149 <span class="preprocessor">#endif</span>
00150 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
00151 <span class="preprocessor"></span>}
00152 
00153 
00154 <span class="keyword">inline</span> <span class="keywordtype">char</span>* pack4(<span class="keywordtype">char</span>* dst, int4 val) { 
00155     *dst++ = char(val &gt;&gt; 24);
00156     *dst++ = char(val &gt;&gt; 16);     
00157     *dst++ = char(val &gt;&gt; 8); 
00158     *dst++ = char(val);
00159     <span class="keywordflow">return</span> dst;
00160 }
00161 
00162 <span class="keyword">inline</span> <span class="keywordtype">char</span>* pack4(<span class="keywordtype">char</span>* dst, <span class="keywordtype">char</span>* src) { 
00163     <span class="keywordflow">return</span> pack4(dst, *(int4*)src); 
00164 }
00165 
00166 <span class="keyword">inline</span> <span class="keywordtype">void</span> pack4(int4&amp; val) { 
00167 <span class="preprocessor">#if BYTE_ORDER != BIG_ENDIAN</span>
00168 <span class="preprocessor"></span><span class="preprocessor">#ifdef USE_HTON_NTOH</span>
00169 <span class="preprocessor"></span>    val = htonl(val);
00170 <span class="preprocessor">#else</span>
00171 <span class="preprocessor"></span>    pack4((<span class="keywordtype">char</span>*)&amp;val, val); 
00172 <span class="preprocessor">#endif</span>
00173 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
00174 <span class="preprocessor"></span>}
00175 
00176 
00177 <span class="keyword">inline</span> <span class="keywordtype">char</span>* pack8(<span class="keywordtype">char</span>* dst, <span class="keywordtype">char</span>* src) { 
00178 <span class="preprocessor">#if BYTE_ORDER == BIG_ENDIAN</span>
00179 <span class="preprocessor"></span>    <span class="keywordflow">return</span> pack4( pack4(dst, src), src + 4);
00180 <span class="preprocessor">#else</span>
00181 <span class="preprocessor"></span>    <span class="keywordflow">return</span> pack4( pack4(dst, src + 4), src);
00182 <span class="preprocessor">#endif</span>
00183 <span class="preprocessor"></span>}
00184 
00185 <span class="keyword">inline</span> <span class="keywordtype">char</span>* pack8(<span class="keywordtype">char</span>* dst, db_int8 val) { 
00186     <span class="keywordflow">return</span> pack8(dst, (<span class="keywordtype">char</span>*)&amp;val);
00187 }
00188 
00189 <span class="keyword">inline</span> <span class="keywordtype">char</span>* pack_oid(<span class="keywordtype">char</span>* dst, cli_oid_t oid)
00190 {
00191     <span class="keywordflow">return</span> (<span class="keyword">sizeof</span>(oid) == 4) ? pack4(dst, oid) : pack8(dst, (char*)&amp;oid);
00192 }
00193 
00194 <span class="keyword">inline</span> int2 unpack2(<span class="keywordtype">char</span>* src) { 
00195     nat1* s = (nat1*)src;
00196     <span class="keywordflow">return</span> (s[0] &lt;&lt; 8) + s[1]; 
00197 }
00198 
00199 <span class="keyword">inline</span> <span class="keywordtype">char</span>* unpack2(<span class="keywordtype">char</span>* dst, <span class="keywordtype">char</span>* src) { 
00200     *(int2*)dst = unpack2(src);
00201     <span class="keywordflow">return</span> src + 2;
00202 }
00203 
00204 <span class="keyword">inline</span> <span class="keywordtype">void</span>  unpack2(int2&amp; val) { 
00205 <span class="preprocessor">#if BYTE_ORDER != BIG_ENDIAN</span>
00206 <span class="preprocessor"></span><span class="preprocessor">#ifdef USE_HTON_NTOH</span>
00207 <span class="preprocessor"></span>    val = ntohs(val);
00208 <span class="preprocessor">#else</span>
00209 <span class="preprocessor"></span>    val = unpack2((<span class="keywordtype">char</span>*)&amp;val); 
00210 <span class="preprocessor">#endif</span>
00211 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
00212 <span class="preprocessor"></span>}
00213 
00214 
00215 <span class="keyword">inline</span> int4  unpack4(<span class="keywordtype">char</span>* src) { 
00216     nat1* s = (nat1*)src;
00217     <span class="keywordflow">return</span> (((((s[0] &lt;&lt; 8) + s[1]) &lt;&lt; 8) + s[2]) &lt;&lt; 8) + s[3];
00218 } 
00219 
00220 <span class="keyword">inline</span> <span class="keywordtype">char</span>* unpack4(<span class="keywordtype">char</span>* dst, <span class="keywordtype">char</span>* src) { 
00221     *(int4*)dst = unpack4(src);
00222     <span class="keywordflow">return</span> src + 4;
00223 }
00224 
00225 <span class="keyword">inline</span> <span class="keywordtype">void</span> unpack4(int4&amp; val) { 
00226 <span class="preprocessor">#if BYTE_ORDER != BIG_ENDIAN</span>
00227 <span class="preprocessor"></span><span class="preprocessor">#ifdef USE_HTON_NTOH</span>
00228 <span class="preprocessor"></span>    val = ntohl(val);
00229 <span class="preprocessor">#else</span>
00230 <span class="preprocessor"></span>    val = unpack4((<span class="keywordtype">char</span>*)&amp;val); 
00231 <span class="preprocessor">#endif</span>
00232 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
00233 <span class="preprocessor"></span>}
00234 
00235 <span class="keyword">inline</span> <span class="keywordtype">char</span>* unpack8(<span class="keywordtype">char</span>* dst, <span class="keywordtype">char</span>* src) { 
00236 <span class="preprocessor">#if BYTE_ORDER == BIG_ENDIAN</span>
00237 <span class="preprocessor"></span>    *(int4*)dst = unpack4(src);
00238     *((int4*)dst+1) = unpack4(src+4);
00239 <span class="preprocessor">#else</span>
00240 <span class="preprocessor"></span>    *(int4*)dst = unpack4(src+4);
00241     *((int4*)dst+1) = unpack4(src);
00242 <span class="preprocessor">#endif</span>
00243 <span class="preprocessor"></span>    <span class="keywordflow">return</span> src + 8;
00244 }
00245 
00246 <span class="keyword">inline</span> db_int8 unpack8(<span class="keywordtype">char</span>* src) { 
00247     db_int8 val;
00248     unpack8((<span class="keywordtype">char</span>*)&amp;val, src);
00249     <span class="keywordflow">return</span> val;
00250 }
00251 
00252 <span class="keyword">inline</span> cli_oid_t unpack_oid(<span class="keywordtype">char</span>* src)
00253 {
00254     cli_oid_t oid;
00255     <span class="keywordflow">if</span> (<span class="keyword">sizeof</span>(oid) == 4) {
00256         oid = unpack4(src);
00257     } <span class="keywordflow">else</span> { 
00258         unpack8((<span class="keywordtype">char</span>*)&amp;oid, src);
00259     }
00260     <span class="keywordflow">return</span> oid;
00261 }
00262 
00263 <span class="keyword">struct </span>cli_request { 
00264     int4 length;
00265     int4 cmd;
00266     int4 stmt_id;
00267     
00268     <span class="keywordtype">void</span> pack() { 
00269         pack4(length);
00270         pack4(cmd);
00271         pack4(stmt_id);
00272     }
00273 
00274     <span class="keywordtype">void</span> unpack() { 
00275         unpack4(length);
00276         unpack4(cmd);
00277         unpack4(stmt_id);
00278     }
00279 };
00280 
00281 <span class="preprocessor">#endif</span>
</pre></div><hr size="1"><address style="align: right;"><small>Generated on Thu Feb 12 13:04:48 2004 for FastDB by
<a href="http://www.doxygen.org/index.html">
<img src="doxygen.png" alt="doxygen" align="middle" border=0 > 
</a>1.3.5 </small></address>
</body>
</html>