| 1 | // -*- mode: cpp; mode: fold -*- |
| 2 | // Description /*{{{*/ |
| 3 | // $Id: tagfile.cc,v 1.37.2.2 2003/12/31 16:02:30 mdz Exp $ |
| 4 | /* ###################################################################### |
| 5 | |
| 6 | Fast scanner for RFC-822 type header information |
| 7 | |
| 8 | This uses a rotating buffer to load the package information into. |
| 9 | The scanner runs over it and isolates and indexes a single section. |
| 10 | |
| 11 | ##################################################################### */ |
| 12 | /*}}}*/ |
| 13 | // Include Files /*{{{*/ |
| 14 | #include<config.h> |
| 15 | |
| 16 | #include <apt-pkg/tagfile.h> |
| 17 | #include <apt-pkg/error.h> |
| 18 | #include <apt-pkg/strutl.h> |
| 19 | #include <apt-pkg/fileutl.h> |
| 20 | |
| 21 | #include <string> |
| 22 | #include <stdio.h> |
| 23 | #include <ctype.h> |
| 24 | #include <stdlib.h> |
| 25 | #include <string.h> |
| 26 | |
| 27 | #include <apti18n.h> |
| 28 | /*}}}*/ |
| 29 | |
| 30 | using std::string; |
| 31 | |
| 32 | class pkgTagFilePrivate |
| 33 | { |
| 34 | public: |
| 35 | pkgTagFilePrivate(FileFd *pFd, unsigned long long Size) : Fd(*pFd), Buffer(NULL), |
| 36 | Start(NULL), End(NULL), |
| 37 | Done(false), iOffset(0), |
| 38 | Size(Size) |
| 39 | { |
| 40 | } |
| 41 | FileFd &Fd; |
| 42 | char *Buffer; |
| 43 | char *Start; |
| 44 | char *End; |
| 45 | bool Done; |
| 46 | unsigned long long iOffset; |
| 47 | unsigned long long Size; |
| 48 | }; |
| 49 | |
| 50 | // TagFile::pkgTagFile - Constructor /*{{{*/ |
| 51 | // --------------------------------------------------------------------- |
| 52 | /* */ |
| 53 | pkgTagFile::pkgTagFile(FileFd *pFd,unsigned long long Size) |
| 54 | { |
| 55 | /* The size is increased by 4 because if we start with the Size of the |
| 56 | filename we need to try to read 1 char more to see an EOF faster, 1 |
| 57 | char the end-pointer can be on and maybe 2 newlines need to be added |
| 58 | to the end of the file -> 4 extra chars */ |
| 59 | Size += 4; |
| 60 | d = new pkgTagFilePrivate(pFd, Size); |
| 61 | |
| 62 | if (d->Fd.IsOpen() == false) |
| 63 | d->Start = d->End = d->Buffer = 0; |
| 64 | else |
| 65 | d->Buffer = (char*)malloc(sizeof(char) * Size); |
| 66 | |
| 67 | if (d->Buffer == NULL) |
| 68 | d->Done = true; |
| 69 | else |
| 70 | d->Done = false; |
| 71 | |
| 72 | d->Start = d->End = d->Buffer; |
| 73 | d->iOffset = 0; |
| 74 | if (d->Done == false) |
| 75 | Fill(); |
| 76 | } |
| 77 | /*}}}*/ |
| 78 | // TagFile::~pkgTagFile - Destructor /*{{{*/ |
| 79 | // --------------------------------------------------------------------- |
| 80 | /* */ |
| 81 | pkgTagFile::~pkgTagFile() |
| 82 | { |
| 83 | free(d->Buffer); |
| 84 | delete d; |
| 85 | } |
| 86 | /*}}}*/ |
| 87 | // TagFile::Offset - Return the current offset in the buffer /*{{{*/ |
| 88 | APT_PURE unsigned long pkgTagFile::Offset() |
| 89 | { |
| 90 | return d->iOffset; |
| 91 | } |
| 92 | /*}}}*/ |
| 93 | // TagFile::Resize - Resize the internal buffer /*{{{*/ |
| 94 | // --------------------------------------------------------------------- |
| 95 | /* Resize the internal buffer (double it in size). Fail if a maximum size |
| 96 | * size is reached. |
| 97 | */ |
| 98 | bool pkgTagFile::Resize() |
| 99 | { |
| 100 | // fail is the buffer grows too big |
| 101 | if(d->Size > 1024*1024+1) |
| 102 | return false; |
| 103 | |
| 104 | return Resize(d->Size * 2); |
| 105 | } |
| 106 | bool pkgTagFile::Resize(unsigned long long const newSize) |
| 107 | { |
| 108 | unsigned long long const EndSize = d->End - d->Start; |
| 109 | |
| 110 | // get new buffer and use it |
| 111 | char* newBuffer = (char*)realloc(d->Buffer, sizeof(char) * newSize); |
| 112 | if (newBuffer == NULL) |
| 113 | return false; |
| 114 | d->Buffer = newBuffer; |
| 115 | d->Size = newSize; |
| 116 | |
| 117 | // update the start/end pointers to the new buffer |
| 118 | d->Start = d->Buffer; |
| 119 | d->End = d->Start + EndSize; |
| 120 | return true; |
| 121 | } |
| 122 | /*}}}*/ |
| 123 | // TagFile::Step - Advance to the next section /*{{{*/ |
| 124 | // --------------------------------------------------------------------- |
| 125 | /* If the Section Scanner fails we refill the buffer and try again. |
| 126 | * If that fails too, double the buffer size and try again until a |
| 127 | * maximum buffer is reached. |
| 128 | */ |
| 129 | bool pkgTagFile::Step(pkgTagSection &Tag) |
| 130 | { |
| 131 | while (Tag.Scan(d->Start,d->End - d->Start) == false) |
| 132 | { |
| 133 | if (Fill() == false) |
| 134 | return false; |
| 135 | |
| 136 | if(Tag.Scan(d->Start,d->End - d->Start)) |
| 137 | break; |
| 138 | |
| 139 | if (Resize() == false) |
| 140 | return _error->Error(_("Unable to parse package file %s (1)"), |
| 141 | d->Fd.Name().c_str()); |
| 142 | } |
| 143 | d->Start += Tag.size(); |
| 144 | d->iOffset += Tag.size(); |
| 145 | |
| 146 | Tag.Trim(); |
| 147 | return true; |
| 148 | } |
| 149 | /*}}}*/ |
| 150 | // TagFile::Fill - Top up the buffer /*{{{*/ |
| 151 | // --------------------------------------------------------------------- |
| 152 | /* This takes the bit at the end of the buffer and puts it at the start |
| 153 | then fills the rest from the file */ |
| 154 | bool pkgTagFile::Fill() |
| 155 | { |
| 156 | unsigned long long EndSize = d->End - d->Start; |
| 157 | unsigned long long Actual = 0; |
| 158 | |
| 159 | memmove(d->Buffer,d->Start,EndSize); |
| 160 | d->Start = d->Buffer; |
| 161 | d->End = d->Buffer + EndSize; |
| 162 | |
| 163 | if (d->Done == false) |
| 164 | { |
| 165 | // See if only a bit of the file is left |
| 166 | unsigned long long const dataSize = d->Size - ((d->End - d->Buffer) + 1); |
| 167 | if (d->Fd.Read(d->End, dataSize, &Actual) == false) |
| 168 | return false; |
| 169 | if (Actual != dataSize) |
| 170 | d->Done = true; |
| 171 | d->End += Actual; |
| 172 | } |
| 173 | |
| 174 | if (d->Done == true) |
| 175 | { |
| 176 | if (EndSize <= 3 && Actual == 0) |
| 177 | return false; |
| 178 | if (d->Size - (d->End - d->Buffer) < 4) |
| 179 | return true; |
| 180 | |
| 181 | // Append a double new line if one does not exist |
| 182 | unsigned int LineCount = 0; |
| 183 | for (const char *E = d->End - 1; E - d->End < 6 && (*E == '\n' || *E == '\r'); E--) |
| 184 | if (*E == '\n') |
| 185 | LineCount++; |
| 186 | if (LineCount < 2) |
| 187 | { |
| 188 | if ((unsigned)(d->End - d->Buffer) >= d->Size) |
| 189 | Resize(d->Size + 3); |
| 190 | for (; LineCount < 2; LineCount++) |
| 191 | *d->End++ = '\n'; |
| 192 | } |
| 193 | |
| 194 | return true; |
| 195 | } |
| 196 | |
| 197 | return true; |
| 198 | } |
| 199 | /*}}}*/ |
| 200 | // TagFile::Jump - Jump to a pre-recorded location in the file /*{{{*/ |
| 201 | // --------------------------------------------------------------------- |
| 202 | /* This jumps to a pre-recorded file location and reads the record |
| 203 | that is there */ |
| 204 | bool pkgTagFile::Jump(pkgTagSection &Tag,unsigned long long Offset) |
| 205 | { |
| 206 | // We are within a buffer space of the next hit.. |
| 207 | if (Offset >= d->iOffset && d->iOffset + (d->End - d->Start) > Offset) |
| 208 | { |
| 209 | unsigned long long Dist = Offset - d->iOffset; |
| 210 | d->Start += Dist; |
| 211 | d->iOffset += Dist; |
| 212 | // if we have seen the end, don't ask for more |
| 213 | if (d->Done == true) |
| 214 | return Tag.Scan(d->Start, d->End - d->Start); |
| 215 | else |
| 216 | return Step(Tag); |
| 217 | } |
| 218 | |
| 219 | // Reposition and reload.. |
| 220 | d->iOffset = Offset; |
| 221 | d->Done = false; |
| 222 | if (d->Fd.Seek(Offset) == false) |
| 223 | return false; |
| 224 | d->End = d->Start = d->Buffer; |
| 225 | |
| 226 | if (Fill() == false) |
| 227 | return false; |
| 228 | |
| 229 | if (Tag.Scan(d->Start, d->End - d->Start) == true) |
| 230 | return true; |
| 231 | |
| 232 | // This appends a double new line (for the real eof handling) |
| 233 | if (Fill() == false) |
| 234 | return false; |
| 235 | |
| 236 | if (Tag.Scan(d->Start, d->End - d->Start) == false) |
| 237 | return _error->Error(_("Unable to parse package file %s (2)"),d->Fd.Name().c_str()); |
| 238 | |
| 239 | return true; |
| 240 | } |
| 241 | /*}}}*/ |
| 242 | // pkgTagSection::pkgTagSection - Constructor /*{{{*/ |
| 243 | // --------------------------------------------------------------------- |
| 244 | /* */ |
| 245 | pkgTagSection::pkgTagSection() |
| 246 | : Section(0), TagCount(0), d(NULL), Stop(0) |
| 247 | { |
| 248 | memset(&Indexes, 0, sizeof(Indexes)); |
| 249 | memset(&AlphaIndexes, 0, sizeof(AlphaIndexes)); |
| 250 | } |
| 251 | /*}}}*/ |
| 252 | // TagSection::Scan - Scan for the end of the header information /*{{{*/ |
| 253 | // --------------------------------------------------------------------- |
| 254 | /* This looks for the first double new line in the data stream. |
| 255 | It also indexes the tags in the section. */ |
| 256 | bool pkgTagSection::Scan(const char *Start,unsigned long MaxLength) |
| 257 | { |
| 258 | const char *End = Start + MaxLength; |
| 259 | Stop = Section = Start; |
| 260 | memset(AlphaIndexes,0,sizeof(AlphaIndexes)); |
| 261 | |
| 262 | if (Stop == 0) |
| 263 | return false; |
| 264 | |
| 265 | TagCount = 0; |
| 266 | while (TagCount+1 < sizeof(Indexes)/sizeof(Indexes[0]) && Stop < End) |
| 267 | { |
| 268 | TrimRecord(true,End); |
| 269 | |
| 270 | // this can happen when TrimRecord trims away the entire Record |
| 271 | // (e.g. because it just contains comments) |
| 272 | if(Stop == End) |
| 273 | return true; |
| 274 | |
| 275 | // Start a new index and add it to the hash |
| 276 | if (isspace(Stop[0]) == 0) |
| 277 | { |
| 278 | Indexes[TagCount++] = Stop - Section; |
| 279 | AlphaIndexes[AlphaHash(Stop,End)] = TagCount; |
| 280 | } |
| 281 | |
| 282 | Stop = (const char *)memchr(Stop,'\n',End - Stop); |
| 283 | |
| 284 | if (Stop == 0) |
| 285 | return false; |
| 286 | |
| 287 | for (; Stop+1 < End && Stop[1] == '\r'; Stop++) |
| 288 | /* nothing */ |
| 289 | ; |
| 290 | |
| 291 | // Double newline marks the end of the record |
| 292 | if (Stop+1 < End && Stop[1] == '\n') |
| 293 | { |
| 294 | Indexes[TagCount] = Stop - Section; |
| 295 | TrimRecord(false,End); |
| 296 | return true; |
| 297 | } |
| 298 | |
| 299 | Stop++; |
| 300 | } |
| 301 | |
| 302 | return false; |
| 303 | } |
| 304 | /*}}}*/ |
| 305 | // TagSection::TrimRecord - Trim off any garbage before/after a record /*{{{*/ |
| 306 | // --------------------------------------------------------------------- |
| 307 | /* There should be exactly 2 newline at the end of the record, no more. */ |
| 308 | void pkgTagSection::TrimRecord(bool BeforeRecord, const char*& End) |
| 309 | { |
| 310 | if (BeforeRecord == true) |
| 311 | return; |
| 312 | for (; Stop < End && (Stop[0] == '\n' || Stop[0] == '\r'); Stop++); |
| 313 | } |
| 314 | /*}}}*/ |
| 315 | // TagSection::Trim - Trim off any trailing garbage /*{{{*/ |
| 316 | // --------------------------------------------------------------------- |
| 317 | /* There should be exactly 1 newline at the end of the buffer, no more. */ |
| 318 | void pkgTagSection::Trim() |
| 319 | { |
| 320 | for (; Stop > Section + 2 && (Stop[-2] == '\n' || Stop[-2] == '\r'); Stop--); |
| 321 | } |
| 322 | /*}}}*/ |
| 323 | // TagSection::Exists - return True if a tag exists /*{{{*/ |
| 324 | bool pkgTagSection::Exists(const char* const Tag) |
| 325 | { |
| 326 | unsigned int tmp; |
| 327 | return Find(Tag, tmp); |
| 328 | } |
| 329 | /*}}}*/ |
| 330 | // TagSection::Find - Locate a tag /*{{{*/ |
| 331 | // --------------------------------------------------------------------- |
| 332 | /* This searches the section for a tag that matches the given string. */ |
| 333 | bool pkgTagSection::Find(const char *Tag,unsigned int &Pos) const |
| 334 | { |
| 335 | unsigned int Length = strlen(Tag); |
| 336 | unsigned int I = AlphaIndexes[AlphaHash(Tag)]; |
| 337 | if (I == 0) |
| 338 | return false; |
| 339 | I--; |
| 340 | |
| 341 | for (unsigned int Counter = 0; Counter != TagCount; Counter++, |
| 342 | I = (I+1)%TagCount) |
| 343 | { |
| 344 | const char *St; |
| 345 | St = Section + Indexes[I]; |
| 346 | if (strncasecmp(Tag,St,Length) != 0) |
| 347 | continue; |
| 348 | |
| 349 | // Make sure the colon is in the right place |
| 350 | const char *C = St + Length; |
| 351 | for (; isspace(*C) != 0; C++); |
| 352 | if (*C != ':') |
| 353 | continue; |
| 354 | Pos = I; |
| 355 | return true; |
| 356 | } |
| 357 | |
| 358 | Pos = 0; |
| 359 | return false; |
| 360 | } |
| 361 | /*}}}*/ |
| 362 | // TagSection::Find - Locate a tag /*{{{*/ |
| 363 | // --------------------------------------------------------------------- |
| 364 | /* This searches the section for a tag that matches the given string. */ |
| 365 | bool pkgTagSection::Find(const char *Tag,const char *&Start, |
| 366 | const char *&End) const |
| 367 | { |
| 368 | unsigned int Length = strlen(Tag); |
| 369 | unsigned int I = AlphaIndexes[AlphaHash(Tag)]; |
| 370 | if (I == 0) |
| 371 | return false; |
| 372 | I--; |
| 373 | |
| 374 | for (unsigned int Counter = 0; Counter != TagCount; Counter++, |
| 375 | I = (I+1)%TagCount) |
| 376 | { |
| 377 | const char *St; |
| 378 | St = Section + Indexes[I]; |
| 379 | if (strncasecmp(Tag,St,Length) != 0) |
| 380 | continue; |
| 381 | |
| 382 | // Make sure the colon is in the right place |
| 383 | const char *C = St + Length; |
| 384 | for (; isspace(*C) != 0; C++); |
| 385 | if (*C != ':') |
| 386 | continue; |
| 387 | |
| 388 | // Strip off the gunk from the start end |
| 389 | Start = C; |
| 390 | End = Section + Indexes[I+1]; |
| 391 | if (Start >= End) |
| 392 | return _error->Error("Internal parsing error"); |
| 393 | |
| 394 | for (; (isspace(*Start) != 0 || *Start == ':') && Start < End; Start++); |
| 395 | for (; isspace(End[-1]) != 0 && End > Start; End--); |
| 396 | |
| 397 | return true; |
| 398 | } |
| 399 | |
| 400 | Start = End = 0; |
| 401 | return false; |
| 402 | } |
| 403 | /*}}}*/ |
| 404 | // TagSection::FindS - Find a string /*{{{*/ |
| 405 | // --------------------------------------------------------------------- |
| 406 | /* */ |
| 407 | string pkgTagSection::FindS(const char *Tag) const |
| 408 | { |
| 409 | const char *Start; |
| 410 | const char *End; |
| 411 | if (Find(Tag,Start,End) == false) |
| 412 | return string(); |
| 413 | return string(Start,End); |
| 414 | } |
| 415 | /*}}}*/ |
| 416 | // TagSection::FindI - Find an integer /*{{{*/ |
| 417 | // --------------------------------------------------------------------- |
| 418 | /* */ |
| 419 | signed int pkgTagSection::FindI(const char *Tag,signed long Default) const |
| 420 | { |
| 421 | const char *Start; |
| 422 | const char *Stop; |
| 423 | if (Find(Tag,Start,Stop) == false) |
| 424 | return Default; |
| 425 | |
| 426 | // Copy it into a temp buffer so we can use strtol |
| 427 | char S[300]; |
| 428 | if ((unsigned)(Stop - Start) >= sizeof(S)) |
| 429 | return Default; |
| 430 | strncpy(S,Start,Stop-Start); |
| 431 | S[Stop - Start] = 0; |
| 432 | |
| 433 | char *End; |
| 434 | signed long Result = strtol(S,&End,10); |
| 435 | if (S == End) |
| 436 | return Default; |
| 437 | return Result; |
| 438 | } |
| 439 | /*}}}*/ |
| 440 | // TagSection::FindULL - Find an unsigned long long integer /*{{{*/ |
| 441 | // --------------------------------------------------------------------- |
| 442 | /* */ |
| 443 | unsigned long long pkgTagSection::FindULL(const char *Tag, unsigned long long const &Default) const |
| 444 | { |
| 445 | const char *Start; |
| 446 | const char *Stop; |
| 447 | if (Find(Tag,Start,Stop) == false) |
| 448 | return Default; |
| 449 | |
| 450 | // Copy it into a temp buffer so we can use strtoull |
| 451 | char S[100]; |
| 452 | if ((unsigned)(Stop - Start) >= sizeof(S)) |
| 453 | return Default; |
| 454 | strncpy(S,Start,Stop-Start); |
| 455 | S[Stop - Start] = 0; |
| 456 | |
| 457 | char *End; |
| 458 | unsigned long long Result = strtoull(S,&End,10); |
| 459 | if (S == End) |
| 460 | return Default; |
| 461 | return Result; |
| 462 | } |
| 463 | /*}}}*/ |
| 464 | // TagSection::FindFlag - Locate a yes/no type flag /*{{{*/ |
| 465 | // --------------------------------------------------------------------- |
| 466 | /* The bits marked in Flag are masked on/off in Flags */ |
| 467 | bool pkgTagSection::FindFlag(const char *Tag,unsigned long &Flags, |
| 468 | unsigned long Flag) const |
| 469 | { |
| 470 | const char *Start; |
| 471 | const char *Stop; |
| 472 | if (Find(Tag,Start,Stop) == false) |
| 473 | return true; |
| 474 | return FindFlag(Flags, Flag, Start, Stop); |
| 475 | } |
| 476 | bool pkgTagSection::FindFlag(unsigned long &Flags, unsigned long Flag, |
| 477 | char const* Start, char const* Stop) |
| 478 | { |
| 479 | switch (StringToBool(string(Start, Stop))) |
| 480 | { |
| 481 | case 0: |
| 482 | Flags &= ~Flag; |
| 483 | return true; |
| 484 | |
| 485 | case 1: |
| 486 | Flags |= Flag; |
| 487 | return true; |
| 488 | |
| 489 | default: |
| 490 | _error->Warning("Unknown flag value: %s",string(Start,Stop).c_str()); |
| 491 | return true; |
| 492 | } |
| 493 | return true; |
| 494 | } |
| 495 | /*}}}*/ |
| 496 | // TFRewrite - Rewrite a control record /*{{{*/ |
| 497 | // --------------------------------------------------------------------- |
| 498 | /* This writes the control record to stdout rewriting it as necessary. The |
| 499 | override map item specificies the rewriting rules to follow. This also |
| 500 | takes the time to sort the feild list. */ |
| 501 | |
| 502 | /* The order of this list is taken from dpkg source lib/parse.c the fieldinfos |
| 503 | array. */ |
| 504 | static const char *iTFRewritePackageOrder[] = { |
| 505 | "Package", |
| 506 | "Essential", |
| 507 | "Status", |
| 508 | "Priority", |
| 509 | "Section", |
| 510 | "Installed-Size", |
| 511 | "Maintainer", |
| 512 | "Original-Maintainer", |
| 513 | "Architecture", |
| 514 | "Source", |
| 515 | "Version", |
| 516 | "Revision", // Obsolete |
| 517 | "Config-Version", // Obsolete |
| 518 | "Replaces", |
| 519 | "Provides", |
| 520 | "Depends", |
| 521 | "Pre-Depends", |
| 522 | "Recommends", |
| 523 | "Suggests", |
| 524 | "Conflicts", |
| 525 | "Breaks", |
| 526 | "Conffiles", |
| 527 | "Filename", |
| 528 | "Size", |
| 529 | "MD5Sum", |
| 530 | "SHA1", |
| 531 | "SHA256", |
| 532 | "SHA512", |
| 533 | "MSDOS-Filename", // Obsolete |
| 534 | "Description", |
| 535 | 0}; |
| 536 | static const char *iTFRewriteSourceOrder[] = {"Package", |
| 537 | "Source", |
| 538 | "Binary", |
| 539 | "Version", |
| 540 | "Priority", |
| 541 | "Section", |
| 542 | "Maintainer", |
| 543 | "Original-Maintainer", |
| 544 | "Build-Depends", |
| 545 | "Build-Depends-Indep", |
| 546 | "Build-Conflicts", |
| 547 | "Build-Conflicts-Indep", |
| 548 | "Architecture", |
| 549 | "Standards-Version", |
| 550 | "Format", |
| 551 | "Directory", |
| 552 | "Files", |
| 553 | 0}; |
| 554 | |
| 555 | /* Two levels of initialization are used because gcc will set the symbol |
| 556 | size of an array to the length of the array, causing dynamic relinking |
| 557 | errors. Doing this makes the symbol size constant */ |
| 558 | const char **TFRewritePackageOrder = iTFRewritePackageOrder; |
| 559 | const char **TFRewriteSourceOrder = iTFRewriteSourceOrder; |
| 560 | |
| 561 | bool TFRewrite(FILE *Output,pkgTagSection const &Tags,const char *Order[], |
| 562 | TFRewriteData *Rewrite) |
| 563 | { |
| 564 | unsigned char Visited[256]; // Bit 1 is Order, Bit 2 is Rewrite |
| 565 | for (unsigned I = 0; I != 256; I++) |
| 566 | Visited[I] = 0; |
| 567 | |
| 568 | // Set new tag up as necessary. |
| 569 | for (unsigned int J = 0; Rewrite != 0 && Rewrite[J].Tag != 0; J++) |
| 570 | { |
| 571 | if (Rewrite[J].NewTag == 0) |
| 572 | Rewrite[J].NewTag = Rewrite[J].Tag; |
| 573 | } |
| 574 | |
| 575 | // Write all all of the tags, in order. |
| 576 | if (Order != NULL) |
| 577 | { |
| 578 | for (unsigned int I = 0; Order[I] != 0; I++) |
| 579 | { |
| 580 | bool Rewritten = false; |
| 581 | |
| 582 | // See if this is a field that needs to be rewritten |
| 583 | for (unsigned int J = 0; Rewrite != 0 && Rewrite[J].Tag != 0; J++) |
| 584 | { |
| 585 | if (strcasecmp(Rewrite[J].Tag,Order[I]) == 0) |
| 586 | { |
| 587 | Visited[J] |= 2; |
| 588 | if (Rewrite[J].Rewrite != 0 && Rewrite[J].Rewrite[0] != 0) |
| 589 | { |
| 590 | if (isspace(Rewrite[J].Rewrite[0])) |
| 591 | fprintf(Output,"%s:%s\n",Rewrite[J].NewTag,Rewrite[J].Rewrite); |
| 592 | else |
| 593 | fprintf(Output,"%s: %s\n",Rewrite[J].NewTag,Rewrite[J].Rewrite); |
| 594 | } |
| 595 | Rewritten = true; |
| 596 | break; |
| 597 | } |
| 598 | } |
| 599 | |
| 600 | // See if it is in the fragment |
| 601 | unsigned Pos; |
| 602 | if (Tags.Find(Order[I],Pos) == false) |
| 603 | continue; |
| 604 | Visited[Pos] |= 1; |
| 605 | |
| 606 | if (Rewritten == true) |
| 607 | continue; |
| 608 | |
| 609 | /* Write out this element, taking a moment to rewrite the tag |
| 610 | in case of changes of case. */ |
| 611 | const char *Start; |
| 612 | const char *Stop; |
| 613 | Tags.Get(Start,Stop,Pos); |
| 614 | |
| 615 | if (fputs(Order[I],Output) < 0) |
| 616 | return _error->Errno("fputs","IO Error to output"); |
| 617 | Start += strlen(Order[I]); |
| 618 | if (fwrite(Start,Stop - Start,1,Output) != 1) |
| 619 | return _error->Errno("fwrite","IO Error to output"); |
| 620 | if (Stop[-1] != '\n') |
| 621 | fprintf(Output,"\n"); |
| 622 | } |
| 623 | } |
| 624 | |
| 625 | // Now write all the old tags that were missed. |
| 626 | for (unsigned int I = 0; I != Tags.Count(); I++) |
| 627 | { |
| 628 | if ((Visited[I] & 1) == 1) |
| 629 | continue; |
| 630 | |
| 631 | const char *Start; |
| 632 | const char *Stop; |
| 633 | Tags.Get(Start,Stop,I); |
| 634 | const char *End = Start; |
| 635 | for (; End < Stop && *End != ':'; End++); |
| 636 | |
| 637 | // See if this is a field that needs to be rewritten |
| 638 | bool Rewritten = false; |
| 639 | for (unsigned int J = 0; Rewrite != 0 && Rewrite[J].Tag != 0; J++) |
| 640 | { |
| 641 | if (stringcasecmp(Start,End,Rewrite[J].Tag) == 0) |
| 642 | { |
| 643 | Visited[J] |= 2; |
| 644 | if (Rewrite[J].Rewrite != 0 && Rewrite[J].Rewrite[0] != 0) |
| 645 | { |
| 646 | if (isspace(Rewrite[J].Rewrite[0])) |
| 647 | fprintf(Output,"%s:%s\n",Rewrite[J].NewTag,Rewrite[J].Rewrite); |
| 648 | else |
| 649 | fprintf(Output,"%s: %s\n",Rewrite[J].NewTag,Rewrite[J].Rewrite); |
| 650 | } |
| 651 | |
| 652 | Rewritten = true; |
| 653 | break; |
| 654 | } |
| 655 | } |
| 656 | |
| 657 | if (Rewritten == true) |
| 658 | continue; |
| 659 | |
| 660 | // Write out this element |
| 661 | if (fwrite(Start,Stop - Start,1,Output) != 1) |
| 662 | return _error->Errno("fwrite","IO Error to output"); |
| 663 | if (Stop[-1] != '\n') |
| 664 | fprintf(Output,"\n"); |
| 665 | } |
| 666 | |
| 667 | // Now write all the rewrites that were missed |
| 668 | for (unsigned int J = 0; Rewrite != 0 && Rewrite[J].Tag != 0; J++) |
| 669 | { |
| 670 | if ((Visited[J] & 2) == 2) |
| 671 | continue; |
| 672 | |
| 673 | if (Rewrite[J].Rewrite != 0 && Rewrite[J].Rewrite[0] != 0) |
| 674 | { |
| 675 | if (isspace(Rewrite[J].Rewrite[0])) |
| 676 | fprintf(Output,"%s:%s\n",Rewrite[J].NewTag,Rewrite[J].Rewrite); |
| 677 | else |
| 678 | fprintf(Output,"%s: %s\n",Rewrite[J].NewTag,Rewrite[J].Rewrite); |
| 679 | } |
| 680 | } |
| 681 | |
| 682 | return true; |
| 683 | } |
| 684 | /*}}}*/ |