📄 lob_8c-source.html
字号:
<a name="l00134"></a>00134 <span class="comment">/* ------------------------------------------------------------------------ *</span><a name="l00135"></a>00135 <span class="comment"> * OCI_LobCreate</span><a name="l00136"></a>00136 <span class="comment"> * ------------------------------------------------------------------------ */</span><a name="l00137"></a>00137 <a name="l00138"></a><a class="code" href="group__g__lob.html#g318f1273603e24b51c3d9e4c29f42685">00138</a> <a class="code" href="struct_o_c_i___lob.html" title="Oracle Internal Large objects:.">OCI_Lob</a> * OCI_API <a class="code" href="group__g__lob.html#g318f1273603e24b51c3d9e4c29f42685" title="Create a local temporary Lob instance.">OCI_LobCreate</a>(<a class="code" href="struct_o_c_i___connection.html" title="Oracle physical connection.">OCI_Connection</a> *con, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> type)<a name="l00139"></a>00139 {<a name="l00140"></a>00140 <a class="code" href="struct_o_c_i___lob.html" title="Oracle Internal Large objects:.">OCI_Lob</a> *lob = NULL;<a name="l00141"></a>00141 <a name="l00142"></a>00142 OCI_CHECK_INITIALIZED(NULL);<a name="l00143"></a>00143 <a name="l00144"></a>00144 OCI_CHECK_PTR(OCI_IPC_CONNECTION, con, NULL);<a name="l00145"></a>00145 <a name="l00146"></a>00146 lob = OCI_LobInit(con, &lob, NULL, type);<a name="l00147"></a>00147 <a name="l00148"></a>00148 OCI_RESULT(lob != NULL);<a name="l00149"></a>00149 <a name="l00150"></a>00150 <span class="keywordflow">return</span> lob;<a name="l00151"></a>00151 }<a name="l00152"></a>00152 <a name="l00153"></a>00153 <span class="comment">/* ------------------------------------------------------------------------ *</span><a name="l00154"></a>00154 <span class="comment"> * OCI_LobFree</span><a name="l00155"></a>00155 <span class="comment"> * ------------------------------------------------------------------------ */</span><a name="l00156"></a>00156 <a name="l00157"></a><a class="code" href="group__g__lob.html#gac269a3de312c2c7d1a6193a9ab79545">00157</a> <span class="keywordtype">boolean</span> OCI_API <a class="code" href="group__g__lob.html#gac269a3de312c2c7d1a6193a9ab79545" title="Free a local temporary lob.">OCI_LobFree</a>(<a class="code" href="struct_o_c_i___lob.html" title="Oracle Internal Large objects:.">OCI_Lob</a> *lob)<a name="l00158"></a>00158 {<a name="l00159"></a>00159 <span class="keywordtype">boolean</span> res = TRUE;<a name="l00160"></a>00160 <a name="l00161"></a>00161 OCI_CHECK_PTR(OCI_IPC_LOB, lob, FALSE);<a name="l00162"></a>00162 <a name="l00163"></a>00163 OCI_CHECK_OBJECT_FETCHED(lob, FALSE);<a name="l00164"></a>00164 <a name="l00165"></a>00165 <span class="keywordflow">if</span> (<a class="code" href="group__g__lob.html#g642bbf0e0fa52f9900aa332ec2d70cdb" title="Check if the given lob is a temporary lob.">OCI_LobIsTemporary</a>(lob) == TRUE)<a name="l00166"></a>00166 {<a name="l00167"></a>00167 OCI_CALL2<a name="l00168"></a>00168 (<a name="l00169"></a>00169 res, lob-><a class="code" href="struct_o_c_i___lob.html#17646b1cc70c0c914ecb28849333fa65">con</a>, <a name="l00170"></a>00170 <a name="l00171"></a>00171 OCILobFreeTemporary(lob-><a class="code" href="struct_o_c_i___lob.html#17646b1cc70c0c914ecb28849333fa65">con</a>-><a class="code" href="struct_o_c_i___connection.html#f20d1bea40e79481aeece933a4c70898">cxt</a>, lob-><a class="code" href="struct_o_c_i___lob.html#17646b1cc70c0c914ecb28849333fa65">con</a>-><a class="code" href="struct_o_c_i___connection.html#573a359867139990b1b0f50aa7a86175">err</a>, lob-><a class="code" href="struct_o_c_i___lob.html#bd1e86de291b7773f17282a1e9f79bd6">handle</a>)<a name="l00172"></a>00172 )<a name="l00173"></a>00173 }<a name="l00174"></a>00174 <a name="l00175"></a>00175 <span class="keywordflow">if</span> (lob-><a class="code" href="struct_o_c_i___lob.html#ec698e0559c2ebc1ba332fe478612bdf">hstate</a> == OCI_OBJECT_ALLOCATED)<a name="l00176"></a>00176 {<a name="l00177"></a>00177 OCI_DescriptorFree((dvoid *) lob-><a class="code" href="struct_o_c_i___lob.html#bd1e86de291b7773f17282a1e9f79bd6">handle</a>, (ub4) OCI_DTYPE_LOB);<a name="l00178"></a>00178 }<a name="l00179"></a>00179 <a name="l00180"></a>00180 OCI_FREE(lob);<a name="l00181"></a>00181 <a name="l00182"></a>00182 OCI_RESULT(res);<a name="l00183"></a>00183 <a name="l00184"></a>00184 <span class="keywordflow">return</span> res;<a name="l00185"></a>00185 }<a name="l00186"></a>00186 <a name="l00187"></a>00187 <span class="comment">/* ------------------------------------------------------------------------ *</span><a name="l00188"></a>00188 <span class="comment"> * OCI_LobGetType</span><a name="l00189"></a>00189 <span class="comment"> * ------------------------------------------------------------------------ */</span><a name="l00190"></a>00190 <a name="l00191"></a><a class="code" href="group__g__lob.html#g08db605f9acb170ddc9b0f403f65d871">00191</a> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> OCI_API <a class="code" href="group__g__lob.html#g08db605f9acb170ddc9b0f403f65d871" title="Return the type of the given Lob object.">OCI_LobGetType</a>(<a class="code" href="struct_o_c_i___lob.html" title="Oracle Internal Large objects:.">OCI_Lob</a> *lob)<a name="l00192"></a>00192 {<a name="l00193"></a>00193 OCI_CHECK_PTR(OCI_IPC_LOB, lob,OCI_UNKNOWN);<a name="l00194"></a>00194 <a name="l00195"></a>00195 OCI_RESULT(TRUE);<a name="l00196"></a>00196 <a name="l00197"></a>00197 <span class="keywordflow">return</span> lob-><a class="code" href="struct_o_c_i___lob.html#f9e973d2ab2c1ec747e9e219f5ca7ba6">type</a>;<a name="l00198"></a>00198 }<a name="l00199"></a>00199 <a name="l00200"></a>00200 <span class="comment">/* ------------------------------------------------------------------------ *</span><a name="l00201"></a>00201 <span class="comment"> * OCI_LobSeek</span><a name="l00202"></a>00202 <span class="comment"> * ------------------------------------------------------------------------ */</span><a name="l00203"></a>00203 <a name="l00204"></a><a class="code" href="group__g__lob.html#g63df7f944c418642fc04571a4a522b87">00204</a> <span class="keywordtype">boolean</span> OCI_API <a class="code" href="group__g__lob.html#g63df7f944c418642fc04571a4a522b87" title="Perform a seek operation on the OCI_lob content buffer.">OCI_LobSeek</a>(<a class="code" href="struct_o_c_i___lob.html" title="Oracle Internal Large objects:.">OCI_Lob</a> *lob, big_uint offset, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> mode)<a name="l00205"></a>00205 {<a name="l00206"></a>00206 <span class="keywordtype">boolean</span> res = TRUE;<a name="l00207"></a>00207 big_uint size = 0;<a name="l00208"></a>00208 <a name="l00209"></a>00209 OCI_CHECK_PTR(OCI_IPC_LOB, lob, FALSE);<a name="l00210"></a>00210 <a name="l00211"></a>00211 size = <a class="code" href="group__g__lob.html#g1fed642e2fdc4b72724340e27e13153e" title="Return the actual length of a lob.">OCI_LobGetLength</a>(lob);<a name="l00212"></a>00212 <a name="l00213"></a>00213 <span class="keywordflow">if</span> ((mode == OCI_SEEK_CUR && (offset + lob-><a class="code" href="struct_o_c_i___lob.html#a2b896dd50cda4d2b8952deccacdc030">offset</a>-1) > size))<a name="l00214"></a>00214 res = FALSE;<a name="l00215"></a>00215 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (mode == OCI_SEEK_SET)<a name="l00216"></a>00216 lob-><a class="code" href="struct_o_c_i___lob.html#a2b896dd50cda4d2b8952deccacdc030">offset</a> = offset + 1;<a name="l00217"></a>00217 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (mode == OCI_SEEK_END)<a name="l00218"></a>00218 lob-><a class="code" href="struct_o_c_i___lob.html#a2b896dd50cda4d2b8952deccacdc030">offset</a> = size-offset + 1;<a name="l00219"></a>00219 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (mode == OCI_SEEK_CUR)<a name="l00220"></a>00220 lob-><a class="code" href="struct_o_c_i___lob.html#a2b896dd50cda4d2b8952deccacdc030">offset</a> += offset;<a name="l00221"></a>00221 <span class="keywordflow">else</span><a name="l00222"></a>00222 res = FALSE;<a name="l00223"></a>00223 <a name="l00224"></a>00224 OCI_RESULT(res);<a name="l00225"></a>00225 <a name="l00226"></a>00226 <span class="keywordflow">return</span> res;<a name="l00227"></a>00227 }<a name="l00228"></a>00228 <a name="l00229"></a>00229 <span class="comment">/* ------------------------------------------------------------------------ *</span><a name="l00230"></a>00230 <span class="comment"> * OCI_LobGetOffset</span><a name="l00231"></a>00231 <span class="comment"> * ------------------------------------------------------------------------ */</span><a name="l00232"></a>00232 <a name="l00233"></a><a class="code" href="group__g__lob.html#gb3bc556383addcbd81f7e4158757626e">00233</a> big_uint OCI_API <a class="code" href="group__g__lob.html#gb3bc556383addcbd81f7e4158757626e" title="Return the current position in the Lob content buffer.">OCI_LobGetOffset</a>(<a class="code" href="struct_o_c_i___lob.html" title="Oracle Internal Large objects:.">OCI_Lob</a> *lob)<a name="l00234"></a>00234 {<a name="l00235"></a>00235 OCI_CHECK_PTR(OCI_IPC_LOB, lob, 0);<a name="l00236"></a>00236 <a name="l00237"></a>00237 OCI_RESULT(TRUE);<a name="l00238"></a>00238 <a name="l00239"></a>00239 <span class="keywordflow">return</span> lob-><a class="code" href="struct_o_c_i___lob.html#a2b896dd50cda4d2b8952deccacdc030">offset</a> - 1;<a name="l00240"></a>00240 }<a name="l00241"></a>00241 <a name="l00242"></a>00242 <span class="comment">/* ------------------------------------------------------------------------ *</span><a name="l00243"></a>00243 <span class="comment"> * OCI_LobRead</span><a name="l00244"></a>00244 <span class="comment"> * ------------------------------------------------------------------------ */</span><a name="l00245"></a>00245 <a name="l00246"></a><a class="code" href="group__g__lob.html#g36708313dc7d5c0b2c30f7f8b9fa2e2d">00246</a> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> OCI_API <a class="code" href="group__g__lob.html#g36708313dc7d5c0b2c30f7f8b9fa2e2d" title="Read a portion of a lob into the given buffer.">OCI_LobRead</a>(<a class="code" href="struct_o_c_i___lob.html" title="Oracle Internal Large objects:.">OCI_Lob</a> *lob, <span class="keywordtype">void</span> *buffer, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> len)<a name="l00247"></a>00247 {<a name="l00248"></a>00248 <span class="keywordtype">boolean</span> res = TRUE;<a name="l00249"></a>00249 ub4 size_in = 0;<a name="l00250"></a>00250 ub4 size_out = 0;<a name="l00251"></a>00251 ub2 csid = 0;<a name="l00252"></a>00252 ub1 csfrm = 0;<a name="l00253"></a>00253 <a name="l00254"></a>00254 OCI_CHECK_PTR(OCI_IPC_LOB, lob, 0);<a name="l00255"></a>00255 OCI_CHECK_MIN(lob-><a class="code" href="struct_o_c_i___lob.html#17646b1cc70c0c914ecb28849333fa65">con</a>, NULL, len, 1, 0);<a name="l00256"></a>00256 <a name="l00257"></a>00257 size_out = size_in = len;<a name="l00258"></a>00258 <a name="l00259"></a>00259 <span class="keywordflow">if</span> (lob-><a class="code" href="struct_o_c_i___lob.html#f9e973d2ab2c1ec747e9e219f5ca7ba6">type</a> != OCI_BLOB)<a name="l00260"></a>00260 {<a name="l00261"></a>00261 <a name="l00262"></a>00262 <span class="preprocessor">#ifndef OCI_CHARSET_ANSI</span><a name="l00263"></a>00263 <span class="preprocessor"></span><a name="l00264"></a>00264 csid = OCI_UTF16ID;<a name="l00265"></a>00265 <a name="l00266"></a>00266 <span class="preprocessor">#endif </span><a name="l00267"></a>00267 <span class="preprocessor"></span> <a name="l00268"></a>00268 size_in *= <span class="keyword">sizeof</span>(odtext);<a name="l00269"></a>00269 }<a name="l00270"></a>00270 <a name="l00271"></a>00271 <span class="keywordflow">if</span> (lob-><a class="code" href="struct_o_c_i___lob.html#f9e973d2ab2c1ec747e9e219f5ca7ba6">type</a> == OCI_NCLOB)<a name="l00272"></a>00272 csfrm = SQLCS_NCHAR;<a name="l00273"></a>00273 <span class="keywordflow">else</span><a name="l00274"></a>00274 csfrm = SQLCS_IMPLICIT;<a name="l00275"></a>00275 <a name="l00276"></a>00276 <span class="preprocessor">#ifdef OCI_LOB2_API_ENABLED</span><a name="l00277"></a>00277 <span class="preprocessor"></span><a name="l00278"></a>00278 <span class="keywordflow">if</span> (OCILib.use_lob_ub8)<a name="l00279"></a>00279 {<a name="l00280"></a>00280 ub8 size_char = (ub8) len;<a name="l00281"></a>00281 ub8 size_byte = (ub8) size_in;⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -