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00032 #include "Exception.h"
00033 #include "Connector.h"
00034
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00043
00044 static const char fileid[] = "$Id: Connector.cpp,v 1.11 2002/10/20 20:42:56 darkeye Exp $";
00045
00046
00047
00048
00049
00050
00051
00052
00053
00054
00055 void
00056 Connector :: init ( Source * source ) throw ( Exception )
00057 {
00058 this->source = source;
00059 this->sinks = 0;
00060 this->numSinks = 0;
00061 }
00062
00063
00064
00065
00066
00067 void
00068 Connector :: strip ( void ) throw ( Exception )
00069 {
00070 source = 0;
00071
00072 if ( sinks ) {
00073 unsigned int u;
00074
00075 for ( u = 0; u < numSinks; ++u ) {
00076 sinks[u] = 0;
00077 }
00078
00079 delete[] sinks;
00080 }
00081 }
00082
00083
00084
00085
00086
00087 Connector :: Connector ( const Connector & connector ) throw ( Exception )
00088 {
00089 unsigned int u;
00090
00091 init( connector.source.get());
00092
00093 for ( u = 0; u < connector.numSinks; ++u ) {
00094 attach( connector.sinks[u].get() );
00095 }
00096 }
00097
00098
00099
00100
00101
00102 Connector &
00103 Connector :: operator= ( const Connector & connector ) throw ( Exception )
00104 {
00105 if ( this != &connector ) {
00106 unsigned int u;
00107
00108
00109 strip();
00110
00111
00112 init( connector.source.get() );
00113
00114 for ( u = 0; u < connector.numSinks; ++u ) {
00115 attach( connector.sinks[u].get() );
00116 }
00117 }
00118
00119 return *this;
00120 }
00121
00122
00123
00124
00125
00126 void
00127 Connector :: attach ( Sink * sink ) throw ( Exception )
00128 {
00129 if ( !sinks ) {
00130
00131 numSinks = 1;
00132 sinks = new Ref<Sink>[1];
00133 sinks[0] = sink;
00134
00135 } else {
00136
00137 unsigned int u;
00138 Ref<Sink> * s = new Ref<Sink>[numSinks + 1];
00139
00140 for ( u = 0; u < numSinks; ++u ) {
00141 s[u] = sinks[u].get();
00142 }
00143
00144 s[numSinks] = sink;
00145 delete[] sinks;
00146 sinks = s;
00147 ++numSinks;
00148 }
00149 }
00150
00151
00152
00153
00154
00155 bool
00156 Connector :: detach ( Sink * sink ) throw ( Exception )
00157 {
00158 if ( numSinks == 0 ) {
00159
00160 return false;
00161
00162 } else if ( numSinks == 1 ) {
00163
00164 if ( sinks[0].get() != sink ) {
00165 return false;
00166 }
00167
00168 sinks[0] = 0;
00169 delete[] sinks;
00170 sinks = 0;
00171 --numSinks;
00172
00173 return true;
00174
00175 } else {
00176
00177 unsigned int u;
00178 unsigned int v;
00179 unsigned int ix;
00180 Ref<Sink> * s;
00181
00182 ix = numSinks;
00183 for ( u = 0; u < numSinks; ++u ) {
00184
00185 if ( sinks[u].get() == sink ) {
00186 ix = u;
00187 break;
00188 }
00189 }
00190
00191 if ( ix == numSinks ) {
00192 return false;
00193 }
00194
00195 s = new Ref<Sink>[numSinks - 1];
00196 for ( u = 0, v = 0; u < numSinks; ++u ) {
00197
00198 if ( u != ix ) {
00199 s[v++] = sinks[u];
00200 }
00201 }
00202
00203 sinks[ix] = 0;
00204 delete[] sinks;
00205 sinks = s;
00206 --numSinks;
00207
00208 return true;
00209 }
00210 }
00211
00212
00213
00214
00215
00216 bool
00217 Connector :: open ( void ) throw ( Exception )
00218 {
00219 unsigned int u;
00220
00221 if ( !source->isOpen() ) {
00222 if ( !source->open() ) {
00223 return false;
00224 }
00225 }
00226
00227 for ( u = 0; u < numSinks; ++u ) {
00228 if ( !sinks[u]->isOpen() ) {
00229 if ( !sinks[u]->open() ) {
00230 break;
00231 }
00232 }
00233 }
00234
00235
00236 if ( u < numSinks ) {
00237 unsigned int v;
00238
00239 for ( v = 0; v < u; ++v ) {
00240 sinks[v]->close();
00241 }
00242
00243 source->close();
00244
00245 return false;
00246 }
00247
00248 return true;
00249 }
00250
00251
00252
00253
00254
00255 unsigned int
00256 Connector :: transfer ( unsigned long bytes,
00257 unsigned int bufSize,
00258 unsigned int sec,
00259 unsigned int usec ) throw ( Exception )
00260 {
00261 unsigned int u;
00262 unsigned long b;
00263
00264 if ( numSinks == 0 ) {
00265 return 0;
00266 }
00267
00268 if ( bufSize == 0 ) {
00269 return 0;
00270 }
00271
00272 unsigned char * buf = new unsigned char[bufSize];
00273
00274 reportEvent( 6, "Connector :: tranfer, bytes", bytes);
00275
00276 for ( b = 0; !bytes || b < bytes; ) {
00277 unsigned int d = 0;
00278 unsigned int e = 0;
00279
00280 if ( source->canRead( sec, usec) ) {
00281 d = source->read( buf, bufSize);
00282
00283
00284 if ( d == 0 ) {
00285 reportEvent( 3, "Connector :: transfer, EOF");
00286 break;
00287 }
00288
00289 for ( u = 0; u < numSinks; ++u ) {
00290
00291 if ( sinks[u]->canWrite( sec, usec) ) {
00292 try {
00293
00294 e = sinks[u]->write( buf, d);
00295 } catch ( Exception & e ) {
00296 sinks[u]->close();
00297 detach( sinks[u].get() );
00298
00299 reportEvent( 4,
00300 "Connector :: transfer, sink removed, remaining",
00301 numSinks);
00302
00303 if ( numSinks == 0 ) {
00304 reportEvent( 4,
00305 "Connector :: transfer, no more sinks");
00306 delete[] buf;
00307 return b;
00308 }
00309
00310
00311 --u;
00312 }
00313 }
00314 }
00315
00316 b += d;
00317 } else {
00318 reportEvent( 3, "Connector :: transfer, can't read");
00319 break;
00320 }
00321 }
00322
00323 delete[] buf;
00324 return b;
00325 }
00326
00327
00328
00329
00330
00331 void
00332 Connector :: close ( void ) throw ( Exception )
00333 {
00334 unsigned int u;
00335
00336 source->close();
00337 for ( u = 0; u < numSinks; ++u ) {
00338 sinks[u]->close();
00339 }
00340 }
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