| 1 | #include <stdio.h>\r |
| 2 | #include <string.h>\r |
| 3 | #include <time.h>\r |
| 4 | \r |
| 5 | #define DAT_START 7\r |
| 6 | \r |
| 7 | typedef struct KvidFileType\r |
| 8 | {\r |
| 9 | FILE *FilePtr;\r |
| 10 | unsigned char AtEOF;\r |
| 11 | struct KvidFileType *Parent;\r |
| 12 | unsigned char DataFile;\r |
| 13 | unsigned char ReSeek;\r |
| 14 | unsigned char CanWrite;\r |
| 15 | unsigned long CurFAT;\r |
| 16 | unsigned long CurAU;\r |
| 17 | unsigned short Offset;\r |
| 18 | unsigned short AUSize;\r |
| 19 | unsigned char LastOp;\r |
| 20 | unsigned char CurBit, CurChar;\r |
| 21 | } KvidFile;\r |
| 22 | \r |
| 23 | KvidFile *MainDat;\r |
| 24 | \r |
| 25 | static unsigned long GetFAT(KvidFile *FileStr, unsigned long AU)\r |
| 26 | {\r |
| 27 | unsigned long CurFAT, i, TargetFAT;\r |
| 28 | \r |
| 29 | CurFAT = 0;\r |
| 30 | TargetFAT = AU / ((FileStr->AUSize >> 2) - 1);\r |
| 31 | for(i = 0; i < TargetFAT; i++)\r |
| 32 | {\r |
| 33 | fseek(FileStr->FilePtr, DAT_START + (CurFAT * FileStr->AUSize), SEEK_SET);\r |
| 34 | fread((void *)&CurFAT, 4, 1, FileStr->FilePtr);\r |
| 35 | }\r |
| 36 | return(CurFAT);\r |
| 37 | }\r |
| 38 | \r |
| 39 | static void SetFATEntry(KvidFile *FileStr, unsigned long AU, unsigned long Entry)\r |
| 40 | {\r |
| 41 | unsigned long CurFAT, i, TargetFAT;\r |
| 42 | \r |
| 43 | CurFAT = 0;\r |
| 44 | TargetFAT = AU / ((FileStr->AUSize >> 2) - 1);\r |
| 45 | for(i = 0; i < TargetFAT; i++)\r |
| 46 | {\r |
| 47 | fseek(FileStr->FilePtr, DAT_START + (CurFAT * FileStr->AUSize), SEEK_SET);\r |
| 48 | fread((void *)&CurFAT, 4, 1, FileStr->FilePtr);\r |
| 49 | if(CurFAT >= 0x80000000)\r |
| 50 | return;\r |
| 51 | }\r |
| 52 | fseek(FileStr->FilePtr, DAT_START + (CurFAT * FileStr->AUSize) + (((AU % ((FileStr->AUSize >> 2) - 1)) + 1) << 2), SEEK_SET);\r |
| 53 | fwrite((void *)&Entry, 4, 1, FileStr->FilePtr);\r |
| 54 | }\r |
| 55 | \r |
| 56 | static unsigned long FindFreeAU(KvidFile *FileStr, unsigned char InhibitCreation)\r |
| 57 | {\r |
| 58 | unsigned long OldFAT, CurFAT, NumEntries, Entry, i, FATNum;\r |
| 59 | \r |
| 60 | CurFAT = 0;\r |
| 61 | FATNum = 0;\r |
| 62 | NumEntries = (FileStr->AUSize >> 2) - 1;\r |
| 63 | while(CurFAT < 0x80000000)\r |
| 64 | {\r |
| 65 | OldFAT = CurFAT;\r |
| 66 | fseek(FileStr->FilePtr, DAT_START + (CurFAT * FileStr->AUSize), SEEK_SET);\r |
| 67 | fread((void *)&CurFAT, 4, 1, FileStr->FilePtr);\r |
| 68 | for(i = 0; i < NumEntries; i++)\r |
| 69 | {\r |
| 70 | fread((void *)&Entry, 4, 1, FileStr->FilePtr);\r |
| 71 | if(Entry == 0)\r |
| 72 | return((FATNum * NumEntries) + i);\r |
| 73 | }\r |
| 74 | FATNum++;\r |
| 75 | }\r |
| 76 | if(InhibitCreation == 1)\r |
| 77 | return(0xFFFFFFFF);\r |
| 78 | fseek(FileStr->FilePtr, DAT_START + (OldFAT * FileStr->AUSize), SEEK_SET);\r |
| 79 | CurFAT = NumEntries * FATNum;\r |
| 80 | fwrite((void *)&CurFAT, 4, 1, FileStr->FilePtr);\r |
| 81 | fseek(FileStr->FilePtr, DAT_START + (CurFAT * FileStr->AUSize), SEEK_SET);\r |
| 82 | Entry = 0xFFFFFFFF;\r |
| 83 | fwrite((void *)&Entry, 4, 1, FileStr->FilePtr);\r |
| 84 | Entry = 0;\r |
| 85 | for(i = 0; i < NumEntries; i++)\r |
| 86 | {\r |
| 87 | fwrite((void *)&Entry, 4, 1, FileStr->FilePtr);\r |
| 88 | }\r |
| 89 | SetFATEntry(FileStr, CurFAT, 0xFFFFFFFE);\r |
| 90 | return(FindFreeAU(FileStr, 1));\r |
| 91 | }\r |
| 92 | \r |
| 93 | static unsigned char GetDatChar(KvidFile *FileStr)\r |
| 94 | {\r |
| 95 | unsigned char RetVal;\r |
| 96 | unsigned short OldAU;\r |
| 97 | unsigned short NumEntries;\r |
| 98 | KvidFile *CurFile;\r |
| 99 | \r |
| 100 | for(CurFile = FileStr->Parent; CurFile != NULL; CurFile = CurFile->Parent)\r |
| 101 | CurFile->ReSeek = 1;\r |
| 102 | if(FileStr->ReSeek == 1)\r |
| 103 | {\r |
| 104 | fseek(FileStr->FilePtr, DAT_START + (FileStr->CurAU * FileStr->AUSize) + FileStr->Offset, SEEK_SET);\r |
| 105 | FileStr->ReSeek = 0;\r |
| 106 | FileStr->CurFAT = 0xFFFFFFFF;\r |
| 107 | }\r |
| 108 | RetVal = (unsigned char)fgetc(FileStr->FilePtr);\r |
| 109 | if(FileStr->Offset++ == FileStr->AUSize - 1)\r |
| 110 | {\r |
| 111 | if(FileStr->CurFAT == 0xFFFFFFFF)\r |
| 112 | FileStr->CurFAT = GetFAT(FileStr, FileStr->CurAU);\r |
| 113 | OldAU = FileStr->CurAU;\r |
| 114 | fseek(FileStr->FilePtr, DAT_START + (FileStr->CurFAT * FileStr->AUSize) + (((FileStr->CurAU % ((FileStr->AUSize >> 2) - 1)) + 1) << 2), SEEK_SET);\r |
| 115 | fread((void *)&FileStr->CurAU, 4, 1, FileStr->FilePtr);\r |
| 116 | if(FileStr->CurAU == 0xFFFFFFFF)\r |
| 117 | FileStr->AtEOF = 1;\r |
| 118 | FileStr->Offset = 0;\r |
| 119 | NumEntries = (FileStr->AUSize >> 2) - 1;\r |
| 120 | if((FileStr->CurAU / NumEntries) == (OldAU / NumEntries))\r |
| 121 | {\r |
| 122 | fseek(FileStr->FilePtr, DAT_START + (FileStr->CurAU * FileStr->AUSize) + FileStr->Offset, SEEK_SET);\r |
| 123 | } else {\r |
| 124 | FileStr->ReSeek = 1;\r |
| 125 | }\r |
| 126 | }\r |
| 127 | return(RetVal);\r |
| 128 | }\r |
| 129 | \r |
| 130 | static void PutDatChar(unsigned char c, KvidFile *FileStr)\r |
| 131 | {\r |
| 132 | unsigned char RetVal;\r |
| 133 | unsigned long OldAU;\r |
| 134 | KvidFile *CurFile;\r |
| 135 | \r |
| 136 | for(CurFile = FileStr->Parent; CurFile != NULL; CurFile = CurFile->Parent)\r |
| 137 | CurFile->ReSeek = 1;\r |
| 138 | if(FileStr->ReSeek == 1)\r |
| 139 | {\r |
| 140 | fseek(FileStr->FilePtr, DAT_START + (FileStr->CurAU * FileStr->AUSize) + FileStr->Offset, SEEK_SET);\r |
| 141 | FileStr->ReSeek = 0;\r |
| 142 | FileStr->CurFAT = 0xFFFFFFFF;\r |
| 143 | }\r |
| 144 | fputc(c, FileStr->FilePtr);\r |
| 145 | if(FileStr->Offset++ == FileStr->AUSize - 1)\r |
| 146 | {\r |
| 147 | if(FileStr->CurFAT == 0xFFFFFFFF)\r |
| 148 | FileStr->CurFAT = GetFAT(FileStr, FileStr->CurAU);\r |
| 149 | fseek(FileStr->FilePtr, DAT_START + (FileStr->CurFAT * FileStr->AUSize) + (((FileStr->CurAU % ((FileStr->AUSize >> 2) - 1)) + 1) << 2), SEEK_SET);\r |
| 150 | OldAU = FileStr->CurAU;\r |
| 151 | fread((void *)&FileStr->CurAU, 4, 1, FileStr->FilePtr);\r |
| 152 | if(FileStr->CurAU == 0xFFFFFFFF)\r |
| 153 | {\r |
| 154 | FileStr->CurAU = FindFreeAU(FileStr, 0);\r |
| 155 | SetFATEntry(FileStr, OldAU, FileStr->CurAU);\r |
| 156 | SetFATEntry(FileStr, FileStr->CurAU, 0xFFFFFFFF);\r |
| 157 | }\r |
| 158 | FileStr->Offset = 0;\r |
| 159 | FileStr->ReSeek = 1;\r |
| 160 | }\r |
| 161 | }\r |
| 162 | \r |
| 163 | unsigned char FileGetChar(KvidFile *FileStr)\r |
| 164 | {\r |
| 165 | signed long RetVal;\r |
| 166 | \r |
| 167 | if(FileStr->AtEOF == 1)\r |
| 168 | return(0);\r |
| 169 | if(FileStr->LastOp == 1)\r |
| 170 | {\r |
| 171 | FileStr->LastOp = 0;\r |
| 172 | fflush(FileStr->FilePtr);\r |
| 173 | }\r |
| 174 | if(FileStr->Parent != NULL)\r |
| 175 | return(GetDatChar(FileStr));\r |
| 176 | if((FileStr->Parent == NULL) && (FileStr->DataFile == 0))\r |
| 177 | {\r |
| 178 | if((RetVal = (signed long)fgetc(FileStr->FilePtr)) == EOF)\r |
| 179 | {\r |
| 180 | FileStr->AtEOF = 1;\r |
| 181 | return(0);\r |
| 182 | } else {\r |
| 183 | return((unsigned char)RetVal);\r |
| 184 | }\r |
| 185 | }\r |
| 186 | if((FileStr->Parent == NULL) && (FileStr->DataFile == 1))\r |
| 187 | return(GetDatChar(FileStr));\r |
| 188 | }\r |
| 189 | \r |
| 190 | void FilePutChar(unsigned char c, KvidFile *FileStr)\r |
| 191 | {\r |
| 192 | if(FileStr->CanWrite == 0)\r |
| 193 | return;\r |
| 194 | FileStr->LastOp = 1;\r |
| 195 | if(FileStr->Parent != NULL)\r |
| 196 | PutDatChar(c, FileStr);\r |
| 197 | if((FileStr->Parent == NULL) && (FileStr->DataFile == 0))\r |
| 198 | fputc(c, FileStr->FilePtr);\r |
| 199 | if((FileStr->Parent == NULL) && (FileStr->DataFile == 1))\r |
| 200 | PutDatChar(c, FileStr);\r |
| 201 | }\r |
| 202 | \r |
| 203 | void FileSkip(KvidFile *FileStr, unsigned long NumBytes)\r |
| 204 | {\r |
| 205 | KvidFile *CurFile;\r |
| 206 | \r |
| 207 | if(FileStr->AtEOF == 1)\r |
| 208 | return;\r |
| 209 | if((FileStr->Parent == NULL) && (FileStr->DataFile == 0))\r |
| 210 | {\r |
| 211 | fseek(FileStr->FilePtr, NumBytes, SEEK_CUR);\r |
| 212 | return;\r |
| 213 | }\r |
| 214 | for(CurFile = FileStr->Parent; CurFile != NULL; CurFile = CurFile->Parent)\r |
| 215 | CurFile->ReSeek = 1;\r |
| 216 | if(FileStr->ReSeek == 1)\r |
| 217 | FileStr->CurFAT = 0xFFFFFFFF;\r |
| 218 | while((NumBytes > 0) && (FileStr->AtEOF == 0))\r |
| 219 | {\r |
| 220 | if(NumBytes < FileStr->AUSize - FileStr->Offset)\r |
| 221 | {\r |
| 222 | if(FileStr->ReSeek == 0)\r |
| 223 | fseek(FileStr->FilePtr, NumBytes, SEEK_CUR);\r |
| 224 | FileStr->Offset += NumBytes;\r |
| 225 | NumBytes = 0;\r |
| 226 | } else {\r |
| 227 | NumBytes -= FileStr->AUSize - FileStr->Offset;\r |
| 228 | if(FileStr->CurFAT == 0xFFFFFFFF)\r |
| 229 | FileStr->CurFAT = GetFAT(FileStr, FileStr->CurAU);\r |
| 230 | fseek(FileStr->FilePtr, DAT_START + (FileStr->CurFAT * FileStr->AUSize) + (((FileStr->CurAU % ((FileStr->AUSize >> 2) - 1)) + 1) << 2), SEEK_SET);\r |
| 231 | fread((void *)&FileStr->CurAU, 4, 1, FileStr->FilePtr);\r |
| 232 | if(FileStr->CurAU == 0xFFFFFFFF)\r |
| 233 | FileStr->AtEOF = 1;\r |
| 234 | FileStr->Offset = 0;\r |
| 235 | FileStr->ReSeek = 1;\r |
| 236 | }\r |
| 237 | }\r |
| 238 | if(FileStr->ReSeek == 1)\r |
| 239 | {\r |
| 240 | fseek(FileStr->FilePtr, DAT_START + (FileStr->CurAU * FileStr->AUSize) + FileStr->Offset, SEEK_SET);\r |
| 241 | FileStr->ReSeek = 0;\r |
| 242 | FileStr->CurFAT = 0xFFFFFFFF;\r |
| 243 | }\r |
| 244 | }\r |
| 245 | \r |
| 246 | unsigned long FileReadBits(unsigned char NumBits, KvidFile *FileStr)\r |
| 247 | {\r |
| 248 | unsigned char i;\r |
| 249 | unsigned long Value;\r |
| 250 | \r |
| 251 | Value = 0;\r |
| 252 | for(i = NumBits; i > 0; i--)\r |
| 253 | {\r |
| 254 | if(FileStr->CurBit > 7)\r |
| 255 | {\r |
| 256 | FileStr->CurChar = fgetc(FileStr->FilePtr);\r |
| 257 | FileStr->CurBit = 7;\r |
| 258 | }\r |
| 259 | if((FileStr->CurChar & (1 << FileStr->CurBit)) != 0)\r |
| 260 | Value += 1 << (i - 1);\r |
| 261 | FileStr->CurBit--;\r |
| 262 | }\r |
| 263 | return(Value);\r |
| 264 | }\r |
| 265 | \r |
| 266 | void FileRead(void *Buffer, unsigned long NumBytes, KvidFile *FileStr)\r |
| 267 | {\r |
| 268 | if((FileStr->Parent == NULL) && (FileStr->DataFile == 0))\r |
| 269 | {\r |
| 270 | fread(Buffer, NumBytes, 1, FileStr->FilePtr);\r |
| 271 | return;\r |
| 272 | }\r |
| 273 | while(NumBytes-- > 0)\r |
| 274 | *(unsigned char *)Buffer++ = FileGetChar(FileStr);\r |
| 275 | }\r |
| 276 | \r |
| 277 | void FileWrite(void *Buffer, unsigned long NumBytes, KvidFile *FileStr)\r |
| 278 | {\r |
| 279 | if(FileStr->CanWrite == 0)\r |
| 280 | return;\r |
| 281 | if((FileStr->Parent == NULL) && (FileStr->DataFile == 0))\r |
| 282 | {\r |
| 283 | fwrite(Buffer, NumBytes, 1, FileStr->FilePtr);\r |
| 284 | return;\r |
| 285 | }\r |
| 286 | while(NumBytes-- > 0)\r |
| 287 | FilePutChar(*(unsigned char *)Buffer++, FileStr);\r |
| 288 | }\r |
| 289 | \r |
| 290 | void FileClose(KvidFile *FileStr)\r |
| 291 | {\r |
| 292 | if(FileStr->Parent == NULL)\r |
| 293 | fclose(FileStr->FilePtr);\r |
| 294 | }\r |
| 295 | \r |
| 296 | unsigned char OpenRootDir(KvidFile *FileStr, KvidFile *ParentFile)\r |
| 297 | {\r |
| 298 | if(ParentFile->DataFile == 0)\r |
| 299 | return(0);\r |
| 300 | FileStr->DataFile = 0;\r |
| 301 | FileStr->CanWrite = ParentFile->CanWrite;\r |
| 302 | FileStr->Parent = ParentFile;\r |
| 303 | FileStr->FilePtr = ParentFile->FilePtr;\r |
| 304 | FileStr->AtEOF = 0;\r |
| 305 | FileStr->LastOp = 0;\r |
| 306 | FileStr->ReSeek = 1;\r |
| 307 | FileStr->CurAU = 1;\r |
| 308 | FileStr->Offset = 0;\r |
| 309 | FileStr->AUSize = ParentFile->AUSize;\r |
| 310 | FileStr->CurBit = 255;\r |
| 311 | return(1);\r |
| 312 | }\r |
| 313 | \r |
| 314 | unsigned char OpenNestedFile(unsigned char *FileName, KvidFile *FileStr, KvidFile *ParentFile, unsigned long *TimeBuffer)\r |
| 315 | {\r |
| 316 | unsigned char FileNameBuffer[20];\r |
| 317 | KvidFile RootDir;\r |
| 318 | \r |
| 319 | if(OpenRootDir(&RootDir, ParentFile) == 0)\r |
| 320 | return(0);\r |
| 321 | FileStr->DataFile = 0;\r |
| 322 | FileStr->CanWrite = ParentFile->CanWrite;\r |
| 323 | FileStr->Parent = ParentFile;\r |
| 324 | FileStr->FilePtr = ParentFile->FilePtr;\r |
| 325 | FileStr->AtEOF = 0;\r |
| 326 | FileStr->LastOp = 0;\r |
| 327 | FileStr->ReSeek = 1;\r |
| 328 | FileStr->Offset = 0;\r |
| 329 | FileStr->AUSize = ParentFile->AUSize;\r |
| 330 | FileStr->CurBit = 255;\r |
| 331 | while(1)\r |
| 332 | {\r |
| 333 | FileRead((void *)FileNameBuffer, 20, &RootDir);\r |
| 334 | if((FileNameBuffer[0] == 0) || (RootDir.AtEOF == 1))\r |
| 335 | return(0);\r |
| 336 | if(strcmp(FileNameBuffer, FileName) == 0)\r |
| 337 | {\r |
| 338 | FileRead((void *)FileNameBuffer, 4, &RootDir);\r |
| 339 | FileNameBuffer[4] = 0;\r |
| 340 | if(TimeBuffer == NULL)\r |
| 341 | FileSkip(&RootDir, 4);\r |
| 342 | else\r |
| 343 | FileRead((void *)TimeBuffer, 4, &RootDir);\r |
| 344 | FileRead((void *)&FileStr->CurAU, 4, &RootDir);\r |
| 345 | if(strcmp(FileNameBuffer, "SDIR") == 0)\r |
| 346 | {\r |
| 347 | FileRead((void *)FileNameBuffer, 5, FileStr);\r |
| 348 | FileNameBuffer[5] = 0;\r |
| 349 | if(strcmp(FileNameBuffer, "KFDAT") != 0)\r |
| 350 | return(0);\r |
| 351 | FileRead((void *)&FileStr->AUSize, 2, FileStr);\r |
| 352 | FileStr->DataFile = 1;\r |
| 353 | }\r |
| 354 | return(1);\r |
| 355 | } else {\r |
| 356 | FileSkip(&RootDir, 12);\r |
| 357 | }\r |
| 358 | }\r |
| 359 | }\r |
| 360 | \r |
| 361 | unsigned char OpenFile(unsigned char *FileName, KvidFile *FileStr)\r |
| 362 | {\r |
| 363 | FileStr->DataFile = 0;\r |
| 364 | FileStr->Parent = NULL;\r |
| 365 | FileStr->AtEOF = 0;\r |
| 366 | FileStr->LastOp = 0;\r |
| 367 | FileStr->CurBit = 255;\r |
| 368 | if((FileStr->FilePtr = fopen(FileName, "rb+")) == NULL)\r |
| 369 | {\r |
| 370 | if((FileStr->FilePtr = fopen(FileName, "rb")) == NULL)\r |
| 371 | return((MainDat == NULL)?0:OpenNestedFile(FileName, FileStr, MainDat, NULL));\r |
| 372 | else\r |
| 373 | FileStr->CanWrite = 0;\r |
| 374 | } else {\r |
| 375 | FileStr->CanWrite = 1;\r |
| 376 | }\r |
| 377 | return(1);\r |
| 378 | }\r |
| 379 | \r |
| 380 | unsigned char DeleteFile(unsigned char *FileName, KvidFile *ParentFile)\r |
| 381 | {\r |
| 382 | unsigned char FileNameBuffer[20];\r |
| 383 | unsigned short OldOffset;\r |
| 384 | unsigned long OldAU, CurAU, CurFAT;\r |
| 385 | KvidFile RootDir;\r |
| 386 | \r |
| 387 | if(OpenRootDir(&RootDir, ParentFile) == 0)\r |
| 388 | return(0);\r |
| 389 | while(1)\r |
| 390 | {\r |
| 391 | OldOffset = RootDir.Offset;\r |
| 392 | OldAU = RootDir.CurAU;\r |
| 393 | FileRead((void *)FileNameBuffer, 20, &RootDir);\r |
| 394 | if((FileNameBuffer[0] == 0) || (RootDir.AtEOF == 1))\r |
| 395 | return(0);\r |
| 396 | if(strcmp(FileNameBuffer, FileName) == 0)\r |
| 397 | {\r |
| 398 | FileSkip(&RootDir, 8);\r |
| 399 | FileRead(&CurAU, 4, &RootDir);\r |
| 400 | RootDir.Offset = OldOffset;\r |
| 401 | RootDir.CurAU = OldAU;\r |
| 402 | RootDir.ReSeek = 1;\r |
| 403 | FilePutChar(1, &RootDir);\r |
| 404 | while(CurAU < 0x80000000)\r |
| 405 | {\r |
| 406 | CurFAT = GetFAT(&RootDir, CurAU);\r |
| 407 | fseek(RootDir.FilePtr, DAT_START + (CurFAT * RootDir.AUSize) + ((CurAU % ((RootDir.AUSize >> 2) - 1)) << 2) + 4, SEEK_SET);\r |
| 408 | OldAU = CurAU;\r |
| 409 | fread((void *)&CurAU, 4, 1, RootDir.FilePtr);\r |
| 410 | fseek(RootDir.FilePtr, DAT_START + (CurFAT * RootDir.AUSize) + ((OldAU % ((RootDir.AUSize >> 2) - 1)) << 2) + 4, SEEK_SET);\r |
| 411 | CurFAT = 0;\r |
| 412 | fwrite((void *)&CurFAT, 4, 1, RootDir.FilePtr);\r |
| 413 | }\r |
| 414 | return(1);\r |
| 415 | } else {\r |
| 416 | FileSkip(&RootDir, 12);\r |
| 417 | }\r |
| 418 | }\r |
| 419 | }\r |
| 420 | \r |
| 421 | unsigned char CreateFile(unsigned char *FileName, KvidFile *FileStr, KvidFile *ParentFile, unsigned long FileType)\r |
| 422 | {\r |
| 423 | KvidFile RootDir;\r |
| 424 | unsigned char FileNameBuffer[20];\r |
| 425 | unsigned char Existing;\r |
| 426 | unsigned long OldAU;\r |
| 427 | unsigned short OldOffset;\r |
| 428 | unsigned long i;\r |
| 429 | unsigned long CurTime;\r |
| 430 | unsigned long NewAU;\r |
| 431 | \r |
| 432 | if(ParentFile == NULL)\r |
| 433 | {\r |
| 434 | FileStr->DataFile = 0;\r |
| 435 | FileStr->Parent = NULL;\r |
| 436 | FileStr->AtEOF = 1;\r |
| 437 | FileStr->LastOp = 0;\r |
| 438 | FileStr->CanWrite = 1;\r |
| 439 | if((FileStr->FilePtr = fopen(FileName, "wb+")) == NULL)\r |
| 440 | return(0);\r |
| 441 | else\r |
| 442 | return(1);\r |
| 443 | }\r |
| 444 | if((OpenRootDir(&RootDir, ParentFile) == 0) || (RootDir.CanWrite == 0))\r |
| 445 | return(0);\r |
| 446 | FileStr->DataFile = 0;\r |
| 447 | FileStr->CanWrite = ParentFile->CanWrite;\r |
| 448 | FileStr->Parent = ParentFile;\r |
| 449 | FileStr->FilePtr = ParentFile->FilePtr;\r |
| 450 | FileStr->AtEOF = 0;\r |
| 451 | FileStr->LastOp = 0;\r |
| 452 | FileStr->ReSeek = 1;\r |
| 453 | FileStr->Offset = 0;\r |
| 454 | FileStr->AUSize = ParentFile->AUSize;\r |
| 455 | FileStr->CurBit = 255;\r |
| 456 | while(1)\r |
| 457 | {\r |
| 458 | OldAU = RootDir.CurAU;\r |
| 459 | OldOffset = RootDir.Offset;\r |
| 460 | FileRead((void *)FileNameBuffer, 20, &RootDir);\r |
| 461 | if(((Existing = FileNameBuffer[0]) < 2) || (RootDir.AtEOF == 1))\r |
| 462 | {\r |
| 463 | RootDir.CurAU = OldAU;\r |
| 464 | RootDir.Offset = OldOffset;\r |
| 465 | RootDir.ReSeek = 1;\r |
| 466 | for(i = 0; FileName[i] != 0; i++)\r |
| 467 | FileNameBuffer[i] = FileName[i];\r |
| 468 | while(i < 20)\r |
| 469 | FileNameBuffer[i++] = 0;\r |
| 470 | FileWrite((void *)FileNameBuffer, 20, &RootDir);\r |
| 471 | FileWrite((void *)&FileType, 4, &RootDir);\r |
| 472 | CurTime = (unsigned long)time(NULL);\r |
| 473 | FileWrite((void *)&CurTime, 4, &RootDir);\r |
| 474 | NewAU = FindFreeAU(ParentFile, 0);\r |
| 475 | SetFATEntry(ParentFile, NewAU, 0xFFFFFFFF);\r |
| 476 | RootDir.ReSeek = 1;\r |
| 477 | FileWrite((void *)&NewAU, 4, &RootDir);\r |
| 478 | if(Existing == 0)\r |
| 479 | for(i = 0; i < 32; i++)\r |
| 480 | FilePutChar(0, &RootDir);\r |
| 481 | FileStr->CurAU = NewAU;\r |
| 482 | return(1);\r |
| 483 | }\r |
| 484 | FileSkip(&RootDir, 12);\r |
| 485 | }\r |
| 486 | }\r |
| 487 | \r |
| 488 | unsigned char OpenDatFile(unsigned char *FileName, KvidFile *FileStr)\r |
| 489 | {\r |
| 490 | unsigned char Signature[6];\r |
| 491 | FileStr->DataFile = 1;\r |
| 492 | FileStr->Parent = NULL;\r |
| 493 | FileStr->ReSeek = 0;\r |
| 494 | FileStr->AtEOF = 0;\r |
| 495 | FileStr->LastOp = 0;\r |
| 496 | FileStr->CurBit = 255;\r |
| 497 | if((FileStr->FilePtr = fopen(FileName, "rb+")) == NULL)\r |
| 498 | {\r |
| 499 | if((FileStr->FilePtr = fopen(FileName, "rb")) == NULL)\r |
| 500 | return(0);\r |
| 501 | else\r |
| 502 | FileStr->CanWrite = 0;\r |
| 503 | } else {\r |
| 504 | FileStr->CanWrite = 1;\r |
| 505 | }\r |
| 506 | fread((void *)Signature, 1, 5, FileStr->FilePtr);\r |
| 507 | Signature[5] = 0;\r |
| 508 | if(strcmp(Signature, "KFDAT") != 0)\r |
| 509 | {\r |
| 510 | fclose(FileStr->FilePtr);\r |
| 511 | return(0);\r |
| 512 | }\r |
| 513 | fread((void *)&FileStr->AUSize, 2, 1, FileStr->FilePtr);\r |
| 514 | if((FileStr->AUSize % 4) != 0)\r |
| 515 | {\r |
| 516 | fclose(FileStr->FilePtr);\r |
| 517 | return(0);\r |
| 518 | }\r |
| 519 | FileStr->CurFAT = 0;\r |
| 520 | FileStr->CurAU = 0;\r |
| 521 | FileStr->Offset = 0;\r |
| 522 | return(1);\r |
| 523 | }\r |