// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
-// $Id: tagfile.cc,v 1.25 1999/07/03 06:45:40 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
##################################################################### */
/*}}}*/
// Include Files /*{{{*/
-#ifdef __GNUG__
-#pragma implementation "apt-pkg/tagfile.h"
-#endif
+#include<config.h>
#include <apt-pkg/tagfile.h>
#include <apt-pkg/error.h>
#include <apt-pkg/strutl.h>
+#include <apt-pkg/fileutl.h>
#include <string>
#include <stdio.h>
+#include <ctype.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <apti18n.h>
+ /*}}}*/
+
+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<TagData> 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))
{
- Buffer = new char[Size];
- Start = End = Buffer;
- Left = Fd.Size();
- iOffset = 0;
- Fill();
+ 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();
}
/*}}}*/
-// pkgTagFile::~pkgTagFile - Destructor /*{{{*/
+// TagFile::~pkgTagFile - Destructor /*{{{*/
// ---------------------------------------------------------------------
/* */
pkgTagFile::~pkgTagFile()
{
- delete [] Buffer;
+ 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)
+{
+ 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)
- return _error->Error("Unable to parse package file %s (1)",Fd.Name().c_str());
- }
- Start += Tag.size();
- iOffset += Tag.size();
-
+ do
+ {
+ 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;
}
/*}}}*/
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(Buffer,Start,EndSize);
- Start = Buffer;
- End = Buffer + EndSize;
+ memmove(d->Buffer,d->Start,EndSize);
+ d->Start = d->Buffer;
+ d->End = d->Buffer + EndSize;
- if (Left == 0)
+ if (d->Done == false)
{
- if (EndSize <= 3)
+ // 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;
- if (Size - (End - Buffer) < 4)
+ if (Actual != dataSize)
+ d->Done = true;
+ d->End += Actual;
+ }
+
+ if (d->Done == true)
+ {
+ if (EndSize <= 3 && Actual == 0)
+ return false;
+ if (d->Size - (d->End - d->Buffer) < 4)
return true;
// Append a double new line if one does not exist
unsigned int LineCount = 0;
- for (const char *E = End - 1; E - End < 6 && (*E == '\n' || *E == '\r'); E--)
+ for (const char *E = d->End - 1; E - d->End < 6 && (*E == '\n' || *E == '\r'); E--)
if (*E == '\n')
LineCount++;
- for (; LineCount < 2; LineCount++)
- *End++ = '\n';
+ if (LineCount < 2)
+ {
+ if ((unsigned)(d->End - d->Buffer) >= d->Size)
+ Resize(d->Size + 3);
+ for (; LineCount < 2; LineCount++)
+ *d->End++ = '\n';
+ }
return true;
}
- // See if only a bit of the file is left
- if (Left < Size - (End - Buffer))
- {
- if (Fd.Read(End,Left) == false)
- return false;
-
- End += Left;
- Left = 0;
- }
- else
- {
- if (Fd.Read(End,Size - (End - Buffer)) == false)
- return false;
-
- Left -= Size - (End - Buffer);
- End = Buffer + Size;
- }
return true;
}
/*}}}*/
// ---------------------------------------------------------------------
/* This jumps to a pre-recorded file location and reads the record
that is there */
-bool pkgTagFile::Jump(pkgTagSection &Tag,unsigned long Offset)
+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(Start,End - Start) == true)
+ 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(Start,End - Start) == false)
- {
- cout << string(Start,End) << endl;
- return _error->Error("Unable to parse package file %s (2)",Fd.Name().c_str());
- }
+ 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);
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. This very simple hash function for the
- first 3 letters gives very good performance on the debian package files */
-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;
- memset(AlphaIndexes,0,sizeof(AlphaIndexes));
+
+ if (Restart == false && d->Tags.empty() == false)
+ {
+ 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();
if (Stop == 0)
return false;
-
- TagCount = 0;
- while (TagCount < sizeof(Indexes)/sizeof(Indexes[0]) && Stop < End)
+
+ 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(Stop[0]) == 0)
+ if (isspace_ascii(Stop[0]) == 0)
{
- Indexes[TagCount++] = Stop - Section;
- unsigned char A = tolower(Stop[0]) - 'a';
- unsigned char B = tolower(Stop[1]) - 'a';
- unsigned char C = tolower(Stop[3]) - 'a';
- AlphaIndexes[((A + C/3)%26) + 26*((B + C/2)%26)] = TagCount;
+ // 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] == '\r' && Stop+1 < End; Stop++);
+
+ for (; Stop+1 < End && Stop[1] == '\r'; Stop++)
+ /* nothing */
+ ;
// Double newline marks the end of the record
if (Stop+1 < End && Stop[1] == '\n')
{
- 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;
}
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)
-{
- unsigned int Length = strlen(Tag);
- unsigned char A = tolower(Tag[0]) - 'a';
- unsigned char B = tolower(Tag[1]) - 'a';
- unsigned char C = tolower(Tag[3]) - 'a';
- unsigned int I = AlphaIndexes[((A + C/3)%26) + 26*((B + C/2)%26)];
- if (I == 0)
+bool pkgTagSection::Find(const char *Tag,unsigned int &Pos) const
+{
+ size_t const Length = strlen(Tag);
+ unsigned int Bucket = AlphaIndexes[AlphaHash(Tag, Length)];
+ if (Bucket == 0)
return false;
- I--;
-
- for (unsigned int Counter = 0; Counter != TagCount; Counter++,
- I = (I+1)%TagCount)
+
+ for (; Bucket != 0; Bucket = d->Tags[Bucket - 1].NextInBucket)
{
- const char *St;
- St = Section + Indexes[I];
- if (strncasecmp(Tag,St,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 = St + Length;
- 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];
- if (Start >= End)
- return _error->Error("Internal parsing error");
-
- 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)
+string pkgTagSection::FindS(const char *Tag) const
{
const char *Start;
const char *End;
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)
+signed int pkgTagSection::FindI(const char *Tag,signed long Default) const
{
const char *Start;
const char *Stop;
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<int>::min() || Result > std::numeric_limits<int>::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)
+ unsigned long Flag) const
{
const char *Start;
const char *Stop;
if (Find(Tag,Start,Stop) == false)
return true;
-
- switch (StringToBool(string(Start,Stop)))
- {
+ 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;
return true;
default:
- _error->Warning("Unknown flag value");
+ _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<pkgTagSection::Tag>::const_iterator &R,
+ std::vector<pkgTagSection::Tag>::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<Tag> 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<Tag>::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<pkgTagSectionPrivate::TagData>::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<Tag>::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<Tag>::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; }
projects / apt.git / blobdiff