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// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
// $Id: deblistparser.cc,v 1.1 1998/07/04 05:58:08 jgg Exp $
/* ######################################################################
Package Cache Generator - Generator for the cache structure.
This builds the cache structure from the abstract package list parser.
##################################################################### */
/*}}}*/
// Include Files /*{{{*/
#include <pkglib/deblistparser.h>
#include <pkglib/error.h>
#include <system.h>
/*}}}*/
// ListParser::debListParser - Constructor /*{{{*/
// ---------------------------------------------------------------------
/* */
debListParser::debListParser(File &File) : Tags(File)
{
Step();
}
/*}}}*/
// ListParser::FindTag - Find the tag and return a string /*{{{*/
// ---------------------------------------------------------------------
/* */
string debListParser::FindTag(const char *Tag)
{
const char *Start;
const char *Stop;
if (Section.Find(Tag,Start,Stop) == false)
return string();
return string(Start,Stop - Start);
}
/*}}}*/
// ListParser::UniqFindTagWrite - Find the tag and write a unq string /*{{{*/
// ---------------------------------------------------------------------
/* */
unsigned long debListParser::UniqFindTagWrite(const char *Tag)
{
const char *Start;
const char *Stop;
if (Section.Find(Tag,Start,Stop) == false)
return 0;
return WriteUniqString(Start,Stop - Start);
}
/*}}}*/
// ListParser::HandleFlag - Sets a flag variable based on a tag /*{{{*/
// ---------------------------------------------------------------------
/* This checks the tag for true/false yes/no etc */
bool debListParser::HandleFlag(const char *Tag,unsigned long &Flags,
unsigned long Flag)
{
const char *Start;
const char *Stop;
if (Section.Find(Tag,Start,Stop) == false)
return true;
int Set = 2;
if (strncasecmp(Start,"yes",Stop - Start) == 0)
Set = 1;
if (strncasecmp(Start,"true",Stop - Start) == 0)
Set = 1;
if (strncasecmp(Start,"no",Stop - Start) == 0)
Set = 0;
if (strncasecmp(Start,"false",Stop - Start) == 0)
Set = 0;
if (Set == 2)
{
_error->Warning("Unknown flag value");
return true;
}
if (Set == 0)
Flags &= ~Flag;
if (Set == 1)
Flags |= Flag;
return true;
}
/*}}}*/
// ListParser::Package - Return the package name /*{{{*/
// ---------------------------------------------------------------------
/* This is to return the name of the package this section describes */
string debListParser::Package()
{
string Result = FindTag("Package");
if (Result.empty() == true)
_error->Error("Encoutered a section with no Package: header");
return Result;
}
/*}}}*/
// ListParser::Version - Return the version string /*{{{*/
// ---------------------------------------------------------------------
/* This is to return the string describing the version in debian form,
epoch:upstream-release. If this returns the blank string then the
entry is assumed to only describe package properties */
string debListParser::Version()
{
return FindTag("Version");
}
/*}}}*/
// ListParser::NewPackage - Fill in the package structure /*{{{*/
// ---------------------------------------------------------------------
/* This is called when a new package structure is created. It must fill
in the static package information. */
bool debListParser::NewPackage(pkgCache::PkgIterator Pkg)
{
// Debian doesnt have anything, everything is condionally megered
return true;
}
/*}}}*/
// ListParser::NewVersion - Fill in the version structure /*{{{*/
// ---------------------------------------------------------------------
/* */
bool debListParser::NewVersion(pkgCache::VerIterator Ver)
{
return true;
}
/*}}}*/
// ListParser::UsePackage - Update a package structure /*{{{*/
// ---------------------------------------------------------------------
/* This is called to update the package with any new information
that might be found in the section */
bool debListParser::UsePackage(pkgCache::PkgIterator Pkg,
pkgCache::VerIterator Ver)
{
if (Pkg->Section == 0)
if ((Pkg->Section = UniqFindTagWrite("Section")) == 0)
return false;
if (HandleFlag("Essential",Pkg->Flags,pkgCache::Essential) == false)
return false;
if (HandleFlag("Immediate-Configure",Pkg->Flags,pkgCache::ImmediateConf) == false)
return false;
if (ParseStatus(Pkg,Ver) == false)
return false;
return true;
}
/*}}}*/
// ListParser::ParseStatus - Parse the status feild /*{{{*/
// ---------------------------------------------------------------------
/* Status lines are of the form,
Status: want flag status
want = unknown, install, hold, deinstall, purge
flag = ok, reinstreq, hold, hold-reinstreq
status = not-installed, unpacked, half-configured, uninstalled,
half-installed, config-files, post-inst-failed,
removal-failed, installed
Some of the above are obsolete (I think?) flag = hold-* and
status = post-inst-failed, removal-failed at least.
*/
bool debListParser::ParseStatus(pkgCache::PkgIterator Pkg,
pkgCache::VerIterator Ver)
{
const char *Start;
const char *Stop;
if (Section.Find("Status",Start,Stop) == false)
return true;
// Isolate the first word
const char *I = Start;
for(; I < Stop && *I != ' '; I++);
if (I >= Stop || *I != ' ')
return _error->Error("Malformed Status line");
// Process the want field
WordList WantList[] = {{"unknown",pkgCache::Unknown},
{"install",pkgCache::Install},
{"hold",pkgCache::Hold},
{"deinstall",pkgCache::DeInstall},
{"purge",pkgCache::Purge}};
if (GrabWord(string(Start,I-Start),WantList,
_count(WantList),Pkg->SelectedState) == false)
return _error->Error("Malformed 1st word in the Status line");
// Isloate the next word
I++;
Start = I;
for(; I < Stop && *I != ' '; I++);
if (I >= Stop || *I != ' ')
return _error->Error("Malformed status line, no 2nd word");
// Process the flag field
WordList FlagList[] = {{"ok",pkgCache::Ok},
{"reinstreq",pkgCache::ReInstReq},
{"hold",pkgCache::HoldInst},
{"hold-reinstreq",pkgCache::HoldReInstReq}};
if (GrabWord(string(Start,I-Start),FlagList,
_count(FlagList),Pkg->InstState) == false)
return _error->Error("Malformed 2nd word in the Status line");
// Isloate the last word
I++;
Start = I;
for(; I < Stop && *I != ' '; I++);
if (I != Stop)
return _error->Error("Malformed Status line, no 3rd word");
// Process the flag field
WordList StatusList[] = {{"not-installed",pkgCache::NotInstalled},
{"unpacked",pkgCache::UnPacked},
{"half-configured",pkgCache::HalfConfigured},
{"installed",pkgCache::Installed},
{"uninstalled",pkgCache::UnInstalled},
{"half-installed",pkgCache::HalfInstalled},
{"config-files",pkgCache::ConfigFiles},
{"post-inst-failed",pkgCache::HalfConfigured},
{"removal-failed",pkgCache::HalfInstalled}};
if (GrabWord(string(Start,I-Start),StatusList,
_count(StatusList),Pkg->CurrentState) == false)
return _error->Error("Malformed 3rd word in the Status line");
/* A Status line marks the package as indicating the current
version as well. Only if it is actually installed.. Otherwise
the interesting dpkg handling of the status file creates bogus
entries. */
if (!(Pkg->CurrentState == pkgCache::NotInstalled ||
Pkg->CurrentState == pkgCache::ConfigFiles))
{
if (Ver.end() == true)
_error->Warning("Encountered status field in a non-version description");
else
Pkg->CurrentVer = Ver.Index();
}
return true;
}
/*}}}*/
// ListParser::GrabWord - Matches a word and returns /*{{{*/
// ---------------------------------------------------------------------
/* Looks for a word in a list of words - for ParseStatus */
bool debListParser::GrabWord(string Word,WordList *List,int Count,
unsigned char &Out)
{
for (int C = 0; C != Count; C++)
{
if (strcasecmp(Word.c_str(),List[C].Str) == 0)
{
Out = List[C].Val;
return true;
}
}
return false;
}
/*}}}*/
// ListParser::Step - Move to the next section in the file /*{{{*/
// ---------------------------------------------------------------------
/* */
bool debListParser::Step()
{
return Tags.Step(Section);
}
/*}}}*/
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