1 /************************************************************** 2 * 3 * Licensed to the Apache Software Foundation (ASF) under one 4 * or more contributor license agreements. See the NOTICE file 5 * distributed with this work for additional information 6 * regarding copyright ownership. The ASF licenses this file 7 * to you under the Apache License, Version 2.0 (the 8 * "License"); you may not use this file except in compliance 9 * with the License. You may obtain a copy of the License at 10 * 11 * http://www.apache.org/licenses/LICENSE-2.0 12 * 13 * Unless required by applicable law or agreed to in writing, 14 * software distributed under the License is distributed on an 15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16 * KIND, either express or implied. See the License for the 17 * specific language governing permissions and limitations 18 * under the License. 19 * 20 *************************************************************/ 21 22 23 24 #include <precomp.h> 25 #include <cosv/file.hxx> 26 27 // NOT FULLY DECLARED SERVICES 28 29 30 namespace csv 31 { 32 33 34 File::File( uintt i_nMode ) 35 : // aPath, 36 pStream(0), 37 nMode(i_nMode), 38 eLastIO(io_none) 39 { 40 } 41 42 File::File( const ploc::Path & i_rLocation, 43 uintt i_nMode ) 44 : aPath(i_rLocation), 45 pStream(0), 46 nMode(i_nMode), 47 eLastIO(io_none) 48 { 49 } 50 51 File::File( const char * i_sLocation, 52 uintt i_nMode ) 53 : aPath(i_sLocation), 54 pStream(0), 55 nMode(i_nMode), 56 eLastIO(io_none) 57 { 58 } 59 60 File::File( const String & i_sLocation, 61 uintt i_nMode ) 62 : aPath(i_sLocation), 63 pStream(0), 64 nMode(i_nMode), 65 eLastIO(io_none) 66 { 67 } 68 69 File::~File() 70 { 71 if ( inq_is_open() ) 72 close(); 73 } 74 75 bool 76 File::Assign( ploc::Path i_rLocation ) 77 { 78 if (is_open() ) 79 return false; 80 81 InvalidatePath(); 82 aPath = i_rLocation; 83 return true; 84 } 85 86 bool 87 File::Assign( const char * i_sLocation ) 88 { 89 if (is_open() ) 90 return false; 91 92 InvalidatePath(); 93 aPath.Set( i_sLocation ); 94 return true; 95 } 96 97 bool 98 File::Assign( const String & i_sLocation ) 99 { 100 if (is_open() ) 101 return false; 102 103 InvalidatePath(); 104 aPath.Set( i_sLocation ); 105 return true; 106 } 107 108 uintt 109 File::do_read( void * out_pDest, 110 uintt i_nNrofBytes ) 111 { 112 if ( NOT inq_is_open() ) 113 return 0; 114 115 if ( eLastIO == io_write ) 116 ::fseek( pStream, 0, SEEK_CUR ); 117 uintt ret = position(); 118 int iRet= ::fread( out_pDest, 1, i_nNrofBytes, pStream ); 119 if ( iRet < 0 ) { 120 fprintf(stderr, "warning: read failed in %s line %d \n", __FILE__, __LINE__); 121 } 122 ret = position() - ret; 123 124 eLastIO = io_read; 125 return ret; 126 } 127 128 bool 129 File::inq_eod() const 130 { 131 if ( NOT inq_is_open() ) 132 return true; 133 return feof(pStream) != 0; 134 } 135 136 uintt 137 File::do_write( const void * i_pSrc, 138 uintt i_nNrofBytes ) 139 { 140 if ( NOT inq_is_open() ) 141 return 0; 142 143 if ( eLastIO == io_write ) 144 ::fseek( pStream, 0, SEEK_CUR ); 145 uintt ret = position(); 146 ::fwrite( i_pSrc, 1, i_nNrofBytes, pStream ); 147 ret = position() - ret; 148 149 eLastIO = io_write; 150 return ret; 151 } 152 153 uintt 154 File::do_seek( intt i_nDistance, 155 seek_dir i_eStartPoint ) 156 { 157 if ( NOT inq_is_open() ) 158 return uintt(-1); 159 160 static int eSearchDir[3] = { SEEK_SET, SEEK_CUR, SEEK_END }; 161 162 ::fseek( pStream, 163 intt(i_nDistance), 164 eSearchDir[i_eStartPoint] ); 165 return position(); 166 } 167 168 uintt 169 File::inq_position() const 170 { 171 if ( inq_is_open() ) 172 return uintt( ::ftell(pStream) ); 173 else 174 return uintt(-1); 175 } 176 177 bool 178 File::do_open( uintt i_nOpenMode ) 179 { 180 if ( inq_is_open() ) 181 { 182 if ( i_nOpenMode == 0 OR i_nOpenMode == nMode ) 183 return true; 184 close(); 185 } 186 187 if ( i_nOpenMode != 0 ) 188 nMode = i_nOpenMode; 189 190 const char * sFacadeMode = ""; 191 switch ( nMode ) 192 { 193 case CFM_RW: sFacadeMode = "r+b"; 194 break; 195 case CFM_CREATE: sFacadeMode = "w+b"; 196 break; 197 case CFM_READ: sFacadeMode = "rb"; 198 break; 199 default: 200 sFacadeMode = "rb"; 201 } 202 203 pStream = ::fopen( StrPath(), sFacadeMode ); 204 if ( pStream == 0 AND nMode == CFM_RW ) 205 { 206 sFacadeMode = "w+b"; 207 pStream = ::fopen( StrPath(), sFacadeMode ); 208 } 209 210 return pStream != 0; 211 } 212 213 void 214 File::do_close() 215 { 216 if ( inq_is_open() ) 217 { 218 ::fclose(pStream); 219 pStream = 0; 220 } 221 eLastIO = io_none; 222 } 223 224 bool 225 File::inq_is_open() const 226 { 227 return pStream != 0; 228 } 229 230 const ploc::Path & 231 File::inq_MyPath() const 232 { 233 return aPath; 234 } 235 236 237 } // namespace csv 238 239