X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/c88edf1d276eb4e01b92835163bdd8574ded93db..c72f5c4fb4b1d496a9bbdb421f25e986f0cba9bf:/apt-pkg/tagfile.cc?ds=sidebyside diff --git a/apt-pkg/tagfile.cc b/apt-pkg/tagfile.cc index 23fc344f3..a0b64f9ca 100644 --- a/apt-pkg/tagfile.cc +++ b/apt-pkg/tagfile.cc @@ -1,6 +1,6 @@ // -*- mode: cpp; mode: fold -*- // Description /*{{{*/ -// $Id: tagfile.cc,v 1.12 1998/10/24 04:58:06 jgg Exp $ +// $Id: tagfile.cc,v 1.37.2.2 2003/12/31 16:02:30 mdz Exp $ /* ###################################################################### Fast scanner for RFC-822 type header information @@ -11,48 +11,198 @@ ##################################################################### */ /*}}}*/ // Include Files /*{{{*/ -#ifdef __GNUG__ -#pragma implementation "apt-pkg/tagfile.h" -#endif +#include #include #include +#include +#include #include #include +#include +#include +#include + +#include + /*}}}*/ + +using std::string; + +class pkgTagFilePrivate +{ +public: + void Reset(FileFd * const pFd, unsigned long long const pSize) + { + if (Buffer != NULL) + free(Buffer); + Buffer = NULL; + Fd = pFd; + Start = NULL; + End = NULL; + Done = false; + iOffset = 0; + Size = pSize; + } + + pkgTagFilePrivate(FileFd * const pFd, unsigned long long const Size) : Buffer(NULL) + { + Reset(pFd, Size); + } + FileFd * Fd; + char *Buffer; + char *Start; + char *End; + bool Done; + unsigned long long iOffset; + unsigned long long Size; + + ~pkgTagFilePrivate() + { + if (Buffer != NULL) + free(Buffer); + } +}; + +class pkgTagSectionPrivate +{ +public: + pkgTagSectionPrivate() + { + } + struct TagData { + unsigned int StartTag; + unsigned int EndTag; + unsigned int StartValue; + unsigned int NextInBucket; + + explicit TagData(unsigned int const StartTag) : StartTag(StartTag), EndTag(0), StartValue(0), NextInBucket(0) {} + }; + std::vector Tags; +}; + +static unsigned long AlphaHash(const char *Text, size_t Length) /*{{{*/ +{ + /* This very simple hash function for the last 8 letters gives + very good performance on the debian package files */ + if (Length > 8) + { + Text += (Length - 8); + Length = 8; + } + unsigned long Res = 0; + for (size_t i = 0; i < Length; ++i) + Res = ((unsigned long)(Text[i]) & 0xDF) ^ (Res << 1); + return Res & 0xFF; +} /*}}}*/ // TagFile::pkgTagFile - Constructor /*{{{*/ // --------------------------------------------------------------------- /* */ -pkgTagFile::pkgTagFile(FileFd &Fd,unsigned long Size) : Fd(Fd), Size(Size) +pkgTagFile::pkgTagFile(FileFd * const pFd,unsigned long long const Size) + : d(new pkgTagFilePrivate(pFd, Size + 4)) +{ + Init(pFd, Size); +} +void pkgTagFile::Init(FileFd * const pFd,unsigned long long Size) +{ + /* The size is increased by 4 because if we start with the Size of the + filename we need to try to read 1 char more to see an EOF faster, 1 + char the end-pointer can be on and maybe 2 newlines need to be added + to the end of the file -> 4 extra chars */ + Size += 4; + d->Reset(pFd, Size); + + if (d->Fd->IsOpen() == false) + d->Start = d->End = d->Buffer = 0; + else + d->Buffer = (char*)malloc(sizeof(char) * Size); + + if (d->Buffer == NULL) + d->Done = true; + else + d->Done = false; + + d->Start = d->End = d->Buffer; + d->iOffset = 0; + if (d->Done == false) + Fill(); +} + /*}}}*/ +// TagFile::~pkgTagFile - Destructor /*{{{*/ +// --------------------------------------------------------------------- +/* */ +pkgTagFile::~pkgTagFile() +{ + delete d; +} + /*}}}*/ +// TagFile::Offset - Return the current offset in the buffer /*{{{*/ +APT_PURE unsigned long pkgTagFile::Offset() +{ + return d->iOffset; +} + /*}}}*/ +// TagFile::Resize - Resize the internal buffer /*{{{*/ +// --------------------------------------------------------------------- +/* Resize the internal buffer (double it in size). Fail if a maximum size + * size is reached. + */ +bool pkgTagFile::Resize() +{ + // fail is the buffer grows too big + if(d->Size > 1024*1024+1) + return false; + + return Resize(d->Size * 2); +} +bool pkgTagFile::Resize(unsigned long long const newSize) { - Buffer = new char[Size]; - Start = End = Buffer; - Left = Fd.Size(); - iOffset = 0; - Fill(); + unsigned long long const EndSize = d->End - d->Start; + + // get new buffer and use it + char* newBuffer = (char*)realloc(d->Buffer, sizeof(char) * newSize); + if (newBuffer == NULL) + return false; + d->Buffer = newBuffer; + d->Size = newSize; + + // update the start/end pointers to the new buffer + d->Start = d->Buffer; + d->End = d->Start + EndSize; + return true; } /*}}}*/ // TagFile::Step - Advance to the next section /*{{{*/ // --------------------------------------------------------------------- -/* If the Section Scanner fails we refill the buffer and try again. */ +/* If the Section Scanner fails we refill the buffer and try again. + * If that fails too, double the buffer size and try again until a + * maximum buffer is reached. + */ bool pkgTagFile::Step(pkgTagSection &Tag) { - if (Tag.Scan(Start,End - Start) == false) + if(Tag.Scan(d->Start,d->End - d->Start) == false) { - if (Fill() == false) - return false; - - if (Tag.Scan(Start,End - Start) == false) + do { - cout << string(Start,End-Start) << endl; - return _error->Error("Unable to parse package file"); - } - } - Start += Tag.size(); - iOffset += Tag.size(); - + if (Fill() == false) + return false; + + if(Tag.Scan(d->Start,d->End - d->Start, false)) + break; + + if (Resize() == false) + return _error->Error(_("Unable to parse package file %s (%d)"), + d->Fd->Name().c_str(), 1); + + } while (Tag.Scan(d->Start,d->End - d->Start, false) == false); + } + + d->Start += Tag.size(); + d->iOffset += Tag.size(); + + Tag.Trim(); return true; } /*}}}*/ @@ -62,126 +212,717 @@ bool pkgTagFile::Step(pkgTagSection &Tag) then fills the rest from the file */ bool pkgTagFile::Fill() { - unsigned long EndSize = End - Start; + unsigned long long EndSize = d->End - d->Start; + unsigned long long Actual = 0; + + memmove(d->Buffer,d->Start,EndSize); + d->Start = d->Buffer; + d->End = d->Buffer + EndSize; - if (Left == 0) + if (d->Done == false) { - if (EndSize <= 1) + // See if only a bit of the file is left + unsigned long long const dataSize = d->Size - ((d->End - d->Buffer) + 1); + if (d->Fd->Read(d->End, dataSize, &Actual) == false) return false; - return true; + if (Actual != dataSize) + d->Done = true; + d->End += Actual; } - memmove(Buffer,Start,EndSize); - Start = Buffer; - End = Buffer + EndSize; - - // See if only a bit of the file is left - if (Left < Size - (End - Buffer)) + if (d->Done == true) { - if (Fd.Read(End,Left) == false) + if (EndSize <= 3 && Actual == 0) return false; + if (d->Size - (d->End - d->Buffer) < 4) + return true; - End += Left; - Left = 0; - } - else - { - if (Fd.Read(End,Size - (End - Buffer)) == false) + // Append a double new line if one does not exist + unsigned int LineCount = 0; + for (const char *E = d->End - 1; E - d->End < 6 && (*E == '\n' || *E == '\r'); E--) + if (*E == '\n') + LineCount++; + if (LineCount < 2) { - cout << "boink" << endl; - return false; + if ((unsigned)(d->End - d->Buffer) >= d->Size) + Resize(d->Size + 3); + for (; LineCount < 2; LineCount++) + *d->End++ = '\n'; } - Left -= Size - (End - Buffer); - End = Buffer + Size; - } + return true; + } + return true; } /*}}}*/ // TagFile::Jump - Jump to a pre-recorded location in the file /*{{{*/ // --------------------------------------------------------------------- -/* This jumps to a pre-recorded file location and */ -bool pkgTagFile::Jump(pkgTagSection &Tag,unsigned long Offset) +/* This jumps to a pre-recorded file location and reads the record + that is there */ +bool pkgTagFile::Jump(pkgTagSection &Tag,unsigned long long Offset) { - iOffset = Offset; - Left = Fd.Size() - Offset; - if (Fd.Seek(Offset) == false) + // We are within a buffer space of the next hit.. + if (Offset >= d->iOffset && d->iOffset + (d->End - d->Start) > Offset) + { + unsigned long long Dist = Offset - d->iOffset; + d->Start += Dist; + d->iOffset += Dist; + // if we have seen the end, don't ask for more + if (d->Done == true) + return Tag.Scan(d->Start, d->End - d->Start); + else + return Step(Tag); + } + + // Reposition and reload.. + d->iOffset = Offset; + d->Done = false; + if (d->Fd->Seek(Offset) == false) return false; - End = Start = Buffer; + d->End = d->Start = d->Buffer; if (Fill() == false) return false; + + if (Tag.Scan(d->Start, d->End - d->Start) == true) + return true; + + // This appends a double new line (for the real eof handling) + if (Fill() == false) + return false; + + if (Tag.Scan(d->Start, d->End - d->Start, false) == false) + return _error->Error(_("Unable to parse package file %s (%d)"),d->Fd->Name().c_str(), 2); - if (Tag.Scan(Start,End - Start) == false) - return _error->Error("Unable to parse package file"); return true; } /*}}}*/ -// TagSection::Scan - Scan for the end of the header information /*{{{*/ +// pkgTagSection::pkgTagSection - Constructor /*{{{*/ // --------------------------------------------------------------------- -/* This looks for the first double new line in the data stream. It also - indexes the tags in the section. */ -bool pkgTagSection::Scan(const char *Start,unsigned long MaxLength) +/* */ +APT_IGNORE_DEPRECATED_PUSH +pkgTagSection::pkgTagSection() + : Section(0), d(new pkgTagSectionPrivate()), Stop(0) +{ + memset(&AlphaIndexes, 0, sizeof(AlphaIndexes)); +} +APT_IGNORE_DEPRECATED_POP + /*}}}*/ +// TagSection::Scan - Scan for the end of the header information /*{{{*/ +bool pkgTagSection::Scan(const char *Start,unsigned long MaxLength, bool const Restart) { + Section = Start; const char *End = Start + MaxLength; - Stop = Section = Start; - - TagCount = 0; - Indexes[TagCount++] = Stop - Section; - Stop++; - for (; Stop < End; Stop++) + + if (Restart == false && d->Tags.empty() == false) { - if (Stop[-1] != '\n') - continue; + Stop = Section + d->Tags.back().StartTag; + if (End <= Stop) + return false; + Stop = (const char *)memchr(Stop,'\n',End - Stop); + if (Stop == NULL) + return false; + ++Stop; + } + else + { + Stop = Section; + if (d->Tags.empty() == false) + { + memset(&AlphaIndexes, 0, sizeof(AlphaIndexes)); + d->Tags.clear(); + } + d->Tags.reserve(0x100); + } + unsigned int TagCount = d->Tags.size(); - // Skip line feeds - for (; Stop[0] == '\r' && Stop < End; Stop++); - - if (Stop[0] == '\n') + if (Stop == 0) + return false; + + pkgTagSectionPrivate::TagData lastTagData(0); + lastTagData.EndTag = 0; + unsigned long lastTagHash = 0; + while (Stop < End) + { + TrimRecord(true,End); + + // this can happen when TrimRecord trims away the entire Record + // (e.g. because it just contains comments) + if(Stop == End) + return true; + + // Start a new index and add it to the hash + if (isspace_ascii(Stop[0]) == 0) + { + // store the last found tag + if (lastTagData.EndTag != 0) + { + if (AlphaIndexes[lastTagHash] != 0) + lastTagData.NextInBucket = AlphaIndexes[lastTagHash]; + APT_IGNORE_DEPRECATED_PUSH + AlphaIndexes[lastTagHash] = TagCount; + APT_IGNORE_DEPRECATED_POP + d->Tags.push_back(lastTagData); + } + + APT_IGNORE_DEPRECATED(++TagCount;) + lastTagData = pkgTagSectionPrivate::TagData(Stop - Section); + // find the colon separating tag and value + char const * Colon = (char const *) memchr(Stop, ':', End - Stop); + if (Colon == NULL) + return false; + // find the end of the tag (which might or might not be the colon) + char const * EndTag = Colon; + --EndTag; + for (; EndTag > Stop && isspace_ascii(*EndTag) != 0; --EndTag) + ; + ++EndTag; + lastTagData.EndTag = EndTag - Section; + lastTagHash = AlphaHash(Stop, EndTag - Stop); + // find the beginning of the value + Stop = Colon + 1; + for (; isspace_ascii(*Stop) != 0; ++Stop) + if (*Stop == '\n' && Stop[1] != ' ') + break; + if (Stop >= End) + return false; + lastTagData.StartValue = Stop - Section; + } + + Stop = (const char *)memchr(Stop,'\n',End - Stop); + + if (Stop == 0) + return false; + + for (; Stop+1 < End && Stop[1] == '\r'; Stop++) + /* nothing */ + ; + + // Double newline marks the end of the record + if (Stop+1 < End && Stop[1] == '\n') { - // Extra one at the end to simplify find - Indexes[TagCount] = Stop - Section; - for (; (Stop[0] == '\n' || Stop[0] == '\r') && Stop < End; Stop++); + if (lastTagData.EndTag != 0) + { + if (AlphaIndexes[lastTagHash] != 0) + lastTagData.NextInBucket = AlphaIndexes[lastTagHash]; + APT_IGNORE_DEPRECATED(AlphaIndexes[lastTagHash] = TagCount;) + d->Tags.push_back(lastTagData); + } + + pkgTagSectionPrivate::TagData const td(Stop - Section); + d->Tags.push_back(td); + TrimRecord(false,End); return true; } - if (isspace(Stop[0]) == 0) - Indexes[TagCount++] = Stop - Section; - - // Just in case. - if (TagCount > sizeof(Indexes)/sizeof(Indexes[0])) - TagCount = sizeof(Indexes)/sizeof(Indexes[0]); - } + Stop++; + } + return false; } /*}}}*/ +// TagSection::TrimRecord - Trim off any garbage before/after a record /*{{{*/ +// --------------------------------------------------------------------- +/* There should be exactly 2 newline at the end of the record, no more. */ +void pkgTagSection::TrimRecord(bool BeforeRecord, const char*& End) +{ + if (BeforeRecord == true) + return; + for (; Stop < End && (Stop[0] == '\n' || Stop[0] == '\r'); Stop++); +} + /*}}}*/ +// TagSection::Trim - Trim off any trailing garbage /*{{{*/ +// --------------------------------------------------------------------- +/* There should be exactly 1 newline at the end of the buffer, no more. */ +void pkgTagSection::Trim() +{ + for (; Stop > Section + 2 && (Stop[-2] == '\n' || Stop[-2] == '\r'); Stop--); +} + /*}}}*/ +// TagSection::Exists - return True if a tag exists /*{{{*/ +bool pkgTagSection::Exists(const char* const Tag) const +{ + unsigned int tmp; + return Find(Tag, tmp); +} + /*}}}*/ // TagSection::Find - Locate a tag /*{{{*/ // --------------------------------------------------------------------- /* This searches the section for a tag that matches the given string. */ -bool pkgTagSection::Find(const char *Tag,const char *&Start, - const char *&End) +bool pkgTagSection::Find(const char *Tag,unsigned int &Pos) const { - unsigned int Length = strlen(Tag); - for (unsigned int I = 0; I != TagCount; I++) + size_t const Length = strlen(Tag); + unsigned int Bucket = AlphaIndexes[AlphaHash(Tag, Length)]; + if (Bucket == 0) + return false; + + for (; Bucket != 0; Bucket = d->Tags[Bucket - 1].NextInBucket) { - if (strncasecmp(Tag,Section + Indexes[I],Length) != 0) + if ((d->Tags[Bucket - 1].EndTag - d->Tags[Bucket - 1].StartTag) != Length) continue; - // Make sure the colon is in the right place - const char *C = Section + Length + Indexes[I]; - for (; isspace(*C) != 0; C++); - if (*C != ':') + char const * const St = Section + d->Tags[Bucket - 1].StartTag; + if (strncasecmp(Tag,St,Length) != 0) continue; - // Strip off the gunk from the start end - Start = C; - End = Section + Indexes[I+1]; - for (; (isspace(*Start) != 0 || *Start == ':') && Start < End; Start++); - for (; isspace(End[-1]) != 0 && End > Start; End--); - + Pos = Bucket - 1; return true; } - Start = End = 0; + + Pos = 0; return false; +} +bool pkgTagSection::Find(const char *Tag,const char *&Start, + const char *&End) const +{ + unsigned int Pos; + if (Find(Tag, Pos) == false) + return false; + + Start = Section + d->Tags[Pos].StartValue; + // Strip off the gunk from the end + End = Section + d->Tags[Pos + 1].StartTag; + if (unlikely(Start > End)) + return _error->Error("Internal parsing error"); + + for (; isspace_ascii(End[-1]) != 0 && End > Start; --End); + + return true; } /*}}}*/ +// TagSection::FindS - Find a string /*{{{*/ +string pkgTagSection::FindS(const char *Tag) const +{ + const char *Start; + const char *End; + if (Find(Tag,Start,End) == false) + return string(); + return string(Start,End); +} + /*}}}*/ +// TagSection::FindRawS - Find a string /*{{{*/ +string pkgTagSection::FindRawS(const char *Tag) const +{ + unsigned int Pos; + if (Find(Tag, Pos) == false) + return ""; + + char const *Start = (char const *) memchr(Section + d->Tags[Pos].EndTag, ':', d->Tags[Pos].StartValue - d->Tags[Pos].EndTag); + ++Start; + char const *End = Section + d->Tags[Pos + 1].StartTag; + if (unlikely(Start > End)) + return ""; + + for (; isspace_ascii(End[-1]) != 0 && End > Start; --End); + + return std::string(Start, End - Start); +} + /*}}}*/ +// TagSection::FindI - Find an integer /*{{{*/ +// --------------------------------------------------------------------- +/* */ +signed int pkgTagSection::FindI(const char *Tag,signed long Default) const +{ + const char *Start; + const char *Stop; + if (Find(Tag,Start,Stop) == false) + return Default; + + // Copy it into a temp buffer so we can use strtol + char S[300]; + if ((unsigned)(Stop - Start) >= sizeof(S)) + return Default; + strncpy(S,Start,Stop-Start); + S[Stop - Start] = 0; + + errno = 0; + char *End; + signed long Result = strtol(S,&End,10); + if (errno == ERANGE || + Result < std::numeric_limits::min() || Result > std::numeric_limits::max()) { + errno = ERANGE; + _error->Error(_("Cannot convert %s to integer: out of range"), S); + } + if (S == End) + return Default; + return Result; +} + /*}}}*/ +// TagSection::FindULL - Find an unsigned long long integer /*{{{*/ +// --------------------------------------------------------------------- +/* */ +unsigned long long pkgTagSection::FindULL(const char *Tag, unsigned long long const &Default) const +{ + const char *Start; + const char *Stop; + if (Find(Tag,Start,Stop) == false) + return Default; + + // Copy it into a temp buffer so we can use strtoull + char S[100]; + if ((unsigned)(Stop - Start) >= sizeof(S)) + return Default; + strncpy(S,Start,Stop-Start); + S[Stop - Start] = 0; + + char *End; + unsigned long long Result = strtoull(S,&End,10); + if (S == End) + return Default; + return Result; +} + /*}}}*/ +// TagSection::FindB - Find boolean value /*{{{*/ +// --------------------------------------------------------------------- +/* */ +bool pkgTagSection::FindB(const char *Tag, bool const &Default) const +{ + const char *Start, *Stop; + if (Find(Tag, Start, Stop) == false) + return Default; + return StringToBool(string(Start, Stop)); +} + /*}}}*/ +// TagSection::FindFlag - Locate a yes/no type flag /*{{{*/ +// --------------------------------------------------------------------- +/* The bits marked in Flag are masked on/off in Flags */ +bool pkgTagSection::FindFlag(const char * const Tag, uint8_t &Flags, + uint8_t const Flag) const +{ + const char *Start; + const char *Stop; + if (Find(Tag,Start,Stop) == false) + return true; + return FindFlag(Flags, Flag, Start, Stop); +} +bool pkgTagSection::FindFlag(uint8_t &Flags, uint8_t const Flag, + char const* const Start, char const* const Stop) +{ + switch (StringToBool(string(Start, Stop))) + { + case 0: + Flags &= ~Flag; + return true; + + case 1: + Flags |= Flag; + return true; + + default: + _error->Warning("Unknown flag value: %s",string(Start,Stop).c_str()); + return true; + } + return true; +} +bool pkgTagSection::FindFlag(const char *Tag,unsigned long &Flags, + unsigned long Flag) const +{ + const char *Start; + const char *Stop; + if (Find(Tag,Start,Stop) == false) + return true; + return FindFlag(Flags, Flag, Start, Stop); +} +bool pkgTagSection::FindFlag(unsigned long &Flags, unsigned long Flag, + char const* Start, char const* Stop) +{ + switch (StringToBool(string(Start, Stop))) + { + case 0: + Flags &= ~Flag; + return true; + + case 1: + Flags |= Flag; + return true; + + default: + _error->Warning("Unknown flag value: %s",string(Start,Stop).c_str()); + return true; + } + return true; +} + /*}}}*/ +void pkgTagSection::Get(const char *&Start,const char *&Stop,unsigned int I) const +{ + Start = Section + d->Tags[I].StartTag; + Stop = Section + d->Tags[I+1].StartTag; +} +APT_PURE unsigned int pkgTagSection::Count() const { /*{{{*/ + if (d->Tags.empty() == true) + return 0; + // the last element is just marking the end and isn't a real one + return d->Tags.size() - 1; +} + /*}}}*/ +// TagSection::Write - Ordered (re)writing of fields /*{{{*/ +pkgTagSection::Tag pkgTagSection::Tag::Remove(std::string const &Name) +{ + return Tag(REMOVE, Name, ""); +} +pkgTagSection::Tag pkgTagSection::Tag::Rename(std::string const &OldName, std::string const &NewName) +{ + return Tag(RENAME, OldName, NewName); +} +pkgTagSection::Tag pkgTagSection::Tag::Rewrite(std::string const &Name, std::string const &Data) +{ + if (Data.empty() == true) + return Tag(REMOVE, Name, ""); + else + return Tag(REWRITE, Name, Data); +} +static bool WriteTag(FileFd &File, std::string Tag, std::string const &Value) +{ + if (Value.empty() || isspace_ascii(Value[0]) != 0) + Tag.append(":"); + else + Tag.append(": "); + Tag.append(Value); + Tag.append("\n"); + return File.Write(Tag.c_str(), Tag.length()); +} +static bool RewriteTags(FileFd &File, pkgTagSection const * const This, char const * const Tag, + std::vector::const_iterator &R, + std::vector::const_iterator const &REnd) +{ + size_t const TagLen = strlen(Tag); + for (; R != REnd; ++R) + { + std::string data; + if (R->Name.length() == TagLen && strncasecmp(R->Name.c_str(), Tag, R->Name.length()) == 0) + { + if (R->Action != pkgTagSection::Tag::REWRITE) + break; + data = R->Data; + } + else if(R->Action == pkgTagSection::Tag::RENAME && R->Data.length() == TagLen && + strncasecmp(R->Data.c_str(), Tag, R->Data.length()) == 0) + data = This->FindRawS(R->Name.c_str()); + else + continue; + + return WriteTag(File, Tag, data); + } + return true; +} +bool pkgTagSection::Write(FileFd &File, char const * const * const Order, std::vector const &Rewrite) const +{ + // first pass: Write everything we have an order for + if (Order != NULL) + { + for (unsigned int I = 0; Order[I] != 0; ++I) + { + std::vector::const_iterator R = Rewrite.begin(); + if (RewriteTags(File, this, Order[I], R, Rewrite.end()) == false) + return false; + if (R != Rewrite.end()) + continue; + + if (Exists(Order[I]) == false) + continue; + + if (WriteTag(File, Order[I], FindRawS(Order[I])) == false) + return false; + } + } + // second pass: See if we have tags which aren't ordered + if (d->Tags.empty() == false) + { + for (std::vector::const_iterator T = d->Tags.begin(); T != d->Tags.end() - 1; ++T) + { + char const * const fieldname = Section + T->StartTag; + size_t fieldnamelen = T->EndTag - T->StartTag; + if (Order != NULL) + { + unsigned int I = 0; + for (; Order[I] != 0; ++I) + { + if (fieldnamelen == strlen(Order[I]) && strncasecmp(fieldname, Order[I], fieldnamelen) == 0) + break; + } + if (Order[I] != 0) + continue; + } + + std::string const name(fieldname, fieldnamelen); + std::vector::const_iterator R = Rewrite.begin(); + if (RewriteTags(File, this, name.c_str(), R, Rewrite.end()) == false) + return false; + if (R != Rewrite.end()) + continue; + + if (WriteTag(File, name, FindRawS(name.c_str())) == false) + return false; + } + } + // last pass: see if there are any rewrites remaining we haven't done yet + for (std::vector::const_iterator R = Rewrite.begin(); R != Rewrite.end(); ++R) + { + if (R->Action == Tag::REMOVE) + continue; + std::string const name = ((R->Action == Tag::RENAME) ? R->Data : R->Name); + if (Exists(name.c_str())) + continue; + if (Order != NULL) + { + unsigned int I = 0; + for (; Order[I] != 0; ++I) + { + if (strncasecmp(name.c_str(), Order[I], name.length()) == 0 && name.length() == strlen(Order[I])) + break; + } + if (Order[I] != 0) + continue; + } + + if (WriteTag(File, name, ((R->Action == Tag::RENAME) ? FindRawS(R->Name.c_str()) : R->Data)) == false) + return false; + } + return true; +} + /*}}}*/ + +void pkgUserTagSection::TrimRecord(bool /*BeforeRecord*/, const char* &End)/*{{{*/ +{ + for (; Stop < End && (Stop[0] == '\n' || Stop[0] == '\r' || Stop[0] == '#'); Stop++) + if (Stop[0] == '#') + Stop = (const char*) memchr(Stop,'\n',End-Stop); +} + /*}}}*/ + +#include "tagfile-order.c" + +// TFRewrite - Rewrite a control record /*{{{*/ +// --------------------------------------------------------------------- +/* This writes the control record to stdout rewriting it as necessary. The + override map item specificies the rewriting rules to follow. This also + takes the time to sort the feild list. */ +APT_IGNORE_DEPRECATED_PUSH +bool TFRewrite(FILE *Output,pkgTagSection const &Tags,const char *Order[], + TFRewriteData *Rewrite) +{ + unsigned char Visited[256]; // Bit 1 is Order, Bit 2 is Rewrite + for (unsigned I = 0; I != 256; I++) + Visited[I] = 0; + + // Set new tag up as necessary. + for (unsigned int J = 0; Rewrite != 0 && Rewrite[J].Tag != 0; J++) + { + if (Rewrite[J].NewTag == 0) + Rewrite[J].NewTag = Rewrite[J].Tag; + } + + // Write all all of the tags, in order. + if (Order != NULL) + { + for (unsigned int I = 0; Order[I] != 0; I++) + { + bool Rewritten = false; + + // See if this is a field that needs to be rewritten + for (unsigned int J = 0; Rewrite != 0 && Rewrite[J].Tag != 0; J++) + { + if (strcasecmp(Rewrite[J].Tag,Order[I]) == 0) + { + Visited[J] |= 2; + if (Rewrite[J].Rewrite != 0 && Rewrite[J].Rewrite[0] != 0) + { + if (isspace_ascii(Rewrite[J].Rewrite[0])) + fprintf(Output,"%s:%s\n",Rewrite[J].NewTag,Rewrite[J].Rewrite); + else + fprintf(Output,"%s: %s\n",Rewrite[J].NewTag,Rewrite[J].Rewrite); + } + Rewritten = true; + break; + } + } + + // See if it is in the fragment + unsigned Pos; + if (Tags.Find(Order[I],Pos) == false) + continue; + Visited[Pos] |= 1; + + if (Rewritten == true) + continue; + + /* Write out this element, taking a moment to rewrite the tag + in case of changes of case. */ + const char *Start; + const char *Stop; + Tags.Get(Start,Stop,Pos); + + if (fputs(Order[I],Output) < 0) + return _error->Errno("fputs","IO Error to output"); + Start += strlen(Order[I]); + if (fwrite(Start,Stop - Start,1,Output) != 1) + return _error->Errno("fwrite","IO Error to output"); + if (Stop[-1] != '\n') + fprintf(Output,"\n"); + } + } + + // Now write all the old tags that were missed. + for (unsigned int I = 0; I != Tags.Count(); I++) + { + if ((Visited[I] & 1) == 1) + continue; + + const char *Start; + const char *Stop; + Tags.Get(Start,Stop,I); + const char *End = Start; + for (; End < Stop && *End != ':'; End++); + + // See if this is a field that needs to be rewritten + bool Rewritten = false; + for (unsigned int J = 0; Rewrite != 0 && Rewrite[J].Tag != 0; J++) + { + if (stringcasecmp(Start,End,Rewrite[J].Tag) == 0) + { + Visited[J] |= 2; + if (Rewrite[J].Rewrite != 0 && Rewrite[J].Rewrite[0] != 0) + { + if (isspace_ascii(Rewrite[J].Rewrite[0])) + fprintf(Output,"%s:%s\n",Rewrite[J].NewTag,Rewrite[J].Rewrite); + else + fprintf(Output,"%s: %s\n",Rewrite[J].NewTag,Rewrite[J].Rewrite); + } + + Rewritten = true; + break; + } + } + + if (Rewritten == true) + continue; + + // Write out this element + if (fwrite(Start,Stop - Start,1,Output) != 1) + return _error->Errno("fwrite","IO Error to output"); + if (Stop[-1] != '\n') + fprintf(Output,"\n"); + } + + // Now write all the rewrites that were missed + for (unsigned int J = 0; Rewrite != 0 && Rewrite[J].Tag != 0; J++) + { + if ((Visited[J] & 2) == 2) + continue; + + if (Rewrite[J].Rewrite != 0 && Rewrite[J].Rewrite[0] != 0) + { + if (isspace_ascii(Rewrite[J].Rewrite[0])) + fprintf(Output,"%s:%s\n",Rewrite[J].NewTag,Rewrite[J].Rewrite); + else + fprintf(Output,"%s: %s\n",Rewrite[J].NewTag,Rewrite[J].Rewrite); + } + } + + return true; +} +APT_IGNORE_DEPRECATED_POP + /*}}}*/ + +pkgTagSection::~pkgTagSection() { delete d; }