[apt.git] / apt-pkg / deb / deblistparser.cc

// -*- mode: cpp; mode: fold -*-
// Description								/*{{{*/
// $Id: deblistparser.cc,v 1.7 1998/07/16 06:08:42 jgg Exp $
/* ######################################################################
   
   Package Cache Generator - Generator for the cache structure.
   
   This builds the cache structure from the abstract package list parser. 
   
   ##################################################################### */
									/*}}}*/
// Include Files							/*{{{*/
#include <apt-pkg/deblistparser.h>
#include <apt-pkg/error.h>
#include <apt-pkg/configuration.h>
#include <strutl.h>

#include <system.h>
									/*}}}*/

// ListParser::debListParser - Constructor				/*{{{*/
// ---------------------------------------------------------------------
/* */
debListParser::debListParser(File &File) : Tags(File)
{
}
									/*}}}*/
// 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::FindTagI - Find the tag and return an int		/*{{{*/
// ---------------------------------------------------------------------
/* */
signed long debListParser::FindTagI(const char *Tag,signed long Default)
{
   const char *Start;
   const char *Stop;
   if (Section.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;
   
   char *End;
   signed long Result = strtol(S,&End,10);
   if (S == End)
      return Default;
   return Result;
}
									/*}}}*/
// 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 (stringcasecmp(Start,Stop,"yes") == 0)
      Set = 1;
   if (stringcasecmp(Start,Stop,"true") == 0)
      Set = 1;
   if (stringcasecmp(Start,Stop,"no") == 0)
      Set = 0;
   if (stringcasecmp(Start,Stop,"false") == 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::NewVersion - Fill in the version structure		/*{{{*/
// ---------------------------------------------------------------------
/* */
bool debListParser::NewVersion(pkgCache::VerIterator Ver)
{
   // Parse the section
   if ((Ver->Section = UniqFindTagWrite("Section")) == 0)
      return _error->Warning("Missing Section tag");
   
   // Archive Size
   if ((Ver->Size = (unsigned)FindTagI("Size")) == 0)
      return _error->Error("Unparsable Size field");
   
   // Unpacked Size (in K)
   if ((Ver->InstalledSize = (unsigned)FindTagI("Installed-Size")) == 0)
      return _error->Error("Unparsable Installed-Size field");
   Ver->InstalledSize *= 1024;

   // Priority
   const char *Start;
   const char *Stop;
   if (Section.Find("Priority",Start,Stop) == true)
   {
      WordList PrioList[] = {{"important",pkgCache::State::Important},
	                     {"required",pkgCache::State::Required},
	                     {"standard",pkgCache::State::Standard},
	                     {"optional",pkgCache::State::Optional},
	                     {"extra",pkgCache::State::Extra}};
      if (GrabWord(string(Start,Stop-Start),PrioList,
		   _count(PrioList),Ver->Priority) == false)
	 return _error->Error("Malformed Priority line");
   }

   if (ParseDepends(Ver,"Depends",pkgCache::Dep::Depends) == false)
      return false;
   if (ParseDepends(Ver,"Pre-Depends",pkgCache::Dep::PreDepends) == false)
      return false;
   if (ParseDepends(Ver,"Suggests",pkgCache::Dep::Suggests) == false)
      return false;
   if (ParseDepends(Ver,"Recommends",pkgCache::Dep::Recommends) == false)
      return false;
   if (ParseDepends(Ver,"Conflicts",pkgCache::Dep::Conflicts) == false)
      return false;
   if (ParseDepends(Ver,"Replaces",pkgCache::Dep::Depends) == false)
      return false;

   if (ParseProvides(Ver) == false)
      return false;
   
   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::Flag::Essential) == false)
      return false;
   if (HandleFlag("Immediate-Configure",Pkg->Flags,pkgCache::Flag::ImmediateConf) == false)
      return false;
   if (ParseStatus(Pkg,Ver) == false)
      return false;
   return true;
}
									/*}}}*/
// ListParser::ParseStatus - Parse the status field			/*{{{*/
// ---------------------------------------------------------------------
/* 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::State::Unknown},
                          {"install",pkgCache::State::Install},
                          {"hold",pkgCache::State::Hold},
                          {"deinstall",pkgCache::State::DeInstall},
                          {"purge",pkgCache::State::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::State::Ok},
                          {"reinstreq",pkgCache::State::ReInstReq},
                          {"hold",pkgCache::State::HoldInst},
                          {"hold-reinstreq",pkgCache::State::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::State::NotInstalled},
                            {"unpacked",pkgCache::State::UnPacked},
                            {"half-configured",pkgCache::State::HalfConfigured},
                            {"installed",pkgCache::State::Installed},
                            {"uninstalled",pkgCache::State::UnInstalled},
                            {"half-installed",pkgCache::State::HalfInstalled},
                            {"config-files",pkgCache::State::ConfigFiles},
                            {"post-inst-failed",pkgCache::State::HalfConfigured},
                            {"removal-failed",pkgCache::State::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::State::NotInstalled ||
	 Pkg->CurrentState == pkgCache::State::ConfigFiles))
   {
      if (Ver.end() == true)
	 _error->Warning("Encountered status field in a non-version description");
      else
	 Pkg->CurrentVer = Ver.Index();
   }
   
   return true;
}
									/*}}}*/
// ListParser::ParseDepends - Parse a dependency element		/*{{{*/
// ---------------------------------------------------------------------
/* This parses the dependency elements out of a standard string in place,
   bit by bit. */
const char *debListParser::ParseDepends(const char *Start,const char *Stop,
					string &Package,string &Ver,
					unsigned int &Op)
{
   // Strip off leading space
   for (;Start != Stop && isspace(*Start) != 0; Start++);
   
   // Parse off the package name
   const char *I = Start;
   for (;I != Stop && isspace(*I) == 0 && *I != '(' && *I != ')' &&
	*I != ',' && *I != '|'; I++);
   
   // Malformed, no '('
   if (I != Stop && *I == ')')
      return 0;

   if (I == Start)
      return 0;
   
   // Stash the package name
   Package.assign(Start,I - Start);
   
   // Skip white space to the '('
   for (;I != Stop && isspace(*I) != 0 ; I++);
   
   // Parse a version
   if (I != Stop && *I == '(')
   {
      // Skip the '('
      for (I++; I != Stop && isspace(*I) != 0 ; I++);
      if (I + 3 >= Stop)
	 return 0;
      
      // Determine the operator
      switch (*I)
      {
	 case '<':
	 I++;
	 if (*I == '=')
	 {
	    I++;
	    Op = pkgCache::Dep::LessEq;
	    break;
	 }
	 
	 if (*I == '<')
	 {
	    I++;
	    Op = pkgCache::Dep::Less;
	    break;
	 }
	 
	 // < is the same as <= and << is really Cs < for some reason
	 Op = pkgCache::Dep::LessEq;
	 break;
	 
	 case '>':
	 I++;
	 if (*I == '=')
	 {
	    I++;
	    Op = pkgCache::Dep::GreaterEq;
	    break;
	 }
	 
	 if (*I == '>')
	 {
	    I++;
	    Op = pkgCache::Dep::Greater;
	    break;
	 }
	 
	 // > is the same as >= and >> is really Cs > for some reason
	 Op = pkgCache::Dep::GreaterEq;
	 break;
	 
	 case '=':
	 Op = pkgCache::Dep::Equals;
	 I++;
	 break;
	 
	 // HACK around bad package definitions
	 default:
	 Op = pkgCache::Dep::Equals;
	 break;
      }
      
      // Skip whitespace
      for (;I != Stop && isspace(*I) != 0; I++);
      Start = I;
      for (;I != Stop && *I != ')'; I++);
      if (I == Stop || Start == I)
	 return 0;     
      
      Ver = string(Start,I-Start);
      I++;
   }
   else
   {
      Ver = string();
      Op = pkgCache::Dep::NoOp;
   }
   
   // Skip whitespace
   for (;I != Stop && isspace(*I) != 0; I++);
   if (I != Stop && *I == '|')
      Op |= pkgCache::Dep::Or;
   
   if (I == Stop || *I == ',' || *I == '|')
   {
      if (I != Stop)
	 for (I++; I != Stop && isspace(*I) != 0; I++);
      return I;
   }
   
   return 0;
}
									/*}}}*/
// ListParser::ParseDepends - Parse a dependency list			/*{{{*/
// ---------------------------------------------------------------------
/* This is the higher level depends parser. It takes a tag and generates
   a complete depends tree for the given version. */
bool debListParser::ParseDepends(pkgCache::VerIterator Ver,
				 const char *Tag,unsigned int Type)
{
   const char *Start;
   const char *Stop;
   if (Section.Find(Tag,Start,Stop) == false)
      return true;
   
   string Package;
   string Version;
   unsigned int Op;

   while (1)
   {
      Start = ParseDepends(Start,Stop,Package,Version,Op);
      if (Start == 0)
	 return _error->Error("Problem parsing dependency %s",Tag);
      
      if (NewDepends(Ver,Package,Version,Op,Type) == false)
	 return false;
      if (Start == Stop)
	 break;
   }
   return true;
}
									/*}}}*/
// ListParser::ParseProvides - Parse the provides list			/*{{{*/
// ---------------------------------------------------------------------
/* */
bool debListParser::ParseProvides(pkgCache::VerIterator Ver)
{
   const char *Start;
   const char *Stop;
   if (Section.Find("Provides",Start,Stop) == false)
      return true;
   
   string Package;
   string Version;
   unsigned int Op;

   while (1)
   {
      Start = ParseDepends(Start,Stop,Package,Version,Op);
      if (Start == 0)
	 return _error->Error("Problem parsing Provides line");
      if (Op != pkgCache::Dep::NoOp)
	 return _error->Error("Malformed provides line");

      if (NewProvides(Ver,Package,Version) == false)
	 return false;

      if (Start == Stop)
	 break;
   }
   
   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		/*{{{*/
// ---------------------------------------------------------------------
/* This has to be carefull to only process the correct architecture */
bool debListParser::Step()
{
   iOffset = Tags.Offset();
   string Arch = _config->Find("APT::architecture");
   while (Tags.Step(Section) == true)
   {
      /* See if this is the correct Architecture, if it isnt then we
         drop the whole section */
      const char *Start;
      const char *Stop;
      if (Section.Find("Architecture",Start,Stop) == false)
	 return true;

      if (stringcmp(Start,Stop,Arch.begin(),Arch.end()) == 0)
	 return true;

      if (stringcmp(Start,Stop,"all") == 0)
	 return true;

      iOffset = Tags.Offset();
   }   
   return false;
}
									/*}}}*/
Commit	Line	Data
f55a958f AL	1	// -- mode: cpp; mode: fold --
f55a958f AL	2	// Description /{{{/
8efa2a3b	3	// $Id: deblistparser.cc,v 1.7 1998/07/16 06:08:42 jgg Exp $
f55a958f AL	4	/* ######################################################################
	5
	6	Package Cache Generator - Generator for the cache structure.
	7
	8	This builds the cache structure from the abstract package list parser.
	9
	10	##################################################################### */
	11	/}}}/
	12	// Include Files /{{{/
094a497d AL	13	#include <apt-pkg/deblistparser.h>
	14	#include <apt-pkg/error.h>
	15	#include <apt-pkg/configuration.h>
9c14e3d6 AL	16	#include <strutl.h>
9c14e3d6 AL	17
f55a958f AL	18	#include <system.h>
	19	/}}}/
	20
	21	// ListParser::debListParser - Constructor /{{{/
	22	// ---------------------------------------------------------------------
	23	/* */
	24	debListParser::debListParser(File &File) : Tags(File)
	25	{
f55a958f AL	26	}
	27	/}}}/
	28	// ListParser::FindTag - Find the tag and return a string /{{{/
	29	// ---------------------------------------------------------------------
	30	/* */
	31	string debListParser::FindTag(const char *Tag)
	32	{
	33	const char *Start;
	34	const char *Stop;
	35	if (Section.Find(Tag,Start,Stop) == false)
	36	return string();
	37	return string(Start,Stop - Start);
	38	}
	39	/}}}/
0149949b AL	40	// ListParser::FindTagI - Find the tag and return an int /{{{/
	41	// ---------------------------------------------------------------------
	42	/* */
	43	signed long debListParser::FindTagI(const char *Tag,signed long Default)
	44	{
	45	const char *Start;
	46	const char *Stop;
	47	if (Section.Find(Tag,Start,Stop) == false)
	48	return Default;
	49
	50	// Copy it into a temp buffer so we can use strtol
	51	char S[300];
	52	if ((unsigned)(Stop - Start) >= sizeof(S))
	53	return Default;
	54	strncpy(S,Start,Stop-Start);
	55	S[Stop - Start] = 0;
	56
	57	char *End;
	58	signed long Result = strtol(S,&End,10);
	59	if (S == End)
	60	return Default;
	61	return Result;
	62	}
	63	/}}}/
f55a958f AL	64	// ListParser::UniqFindTagWrite - Find the tag and write a unq string /{{{/
	65	// ---------------------------------------------------------------------
	66	/* */
	67	unsigned long debListParser::UniqFindTagWrite(const char *Tag)
	68	{
	69	const char *Start;
	70	const char *Stop;
	71	if (Section.Find(Tag,Start,Stop) == false)
	72	return 0;
	73	return WriteUniqString(Start,Stop - Start);
	74	}
	75	/}}}/
	76	// ListParser::HandleFlag - Sets a flag variable based on a tag /{{{/
	77	// ---------------------------------------------------------------------
	78	/* This checks the tag for true/false yes/no etc */
	79	bool debListParser::HandleFlag(const char *Tag,unsigned long &Flags,
	80	unsigned long Flag)
	81	{
	82	const char *Start;
	83	const char *Stop;
	84	if (Section.Find(Tag,Start,Stop) == false)
	85	return true;
	86
	87	int Set = 2;
9c14e3d6	88	if (stringcasecmp(Start,Stop,"yes") == 0)
f55a958f	89	Set = 1;
9c14e3d6	90	if (stringcasecmp(Start,Stop,"true") == 0)
f55a958f	91	Set = 1;
9c14e3d6	92	if (stringcasecmp(Start,Stop,"no") == 0)
f55a958f	93	Set = 0;
9c14e3d6	94	if (stringcasecmp(Start,Stop,"false") == 0)
f55a958f AL	95	Set = 0;
	96	if (Set == 2)
	97	{
	98	_error->Warning("Unknown flag value");
	99	return true;
	100	}
	101
	102	if (Set == 0)
	103	Flags &= ~Flag;
	104	if (Set == 1)
	105	Flags \|= Flag;
	106	return true;
	107	}
	108	/}}}/
	109	// ListParser::Package - Return the package name /{{{/
	110	// ---------------------------------------------------------------------
	111	/* This is to return the name of the package this section describes */
	112	string debListParser::Package()
	113	{
	114	string Result = FindTag("Package");
	115	if (Result.empty() == true)
	116	_error->Error("Encoutered a section with no Package: header");
	117	return Result;
	118	}
	119	/}}}/
	120	// ListParser::Version - Return the version string /{{{/
	121	// ---------------------------------------------------------------------
	122	/* This is to return the string describing the version in debian form,
	123	epoch:upstream-release. If this returns the blank string then the
	124	entry is assumed to only describe package properties */
	125	string debListParser::Version()
	126	{
	127	return FindTag("Version");
	128	}
	129	/}}}/
f55a958f AL	130	// ListParser::NewVersion - Fill in the version structure /{{{/
	131	// ---------------------------------------------------------------------
	132	/* */
	133	bool debListParser::NewVersion(pkgCache::VerIterator Ver)
0149949b AL	134	{
	135	// Parse the section
	136	if ((Ver->Section = UniqFindTagWrite("Section")) == 0)
	137	return _error->Warning("Missing Section tag");
	138
	139	// Archive Size
	140	if ((Ver->Size = (unsigned)FindTagI("Size")) == 0)
	141	return _error->Error("Unparsable Size field");
	142
	143	// Unpacked Size (in K)
	144	if ((Ver->InstalledSize = (unsigned)FindTagI("Installed-Size")) == 0)
	145	return _error->Error("Unparsable Installed-Size field");
	146	Ver->InstalledSize *= 1024;
	147
	148	// Priority
	149	const char *Start;
	150	const char *Stop;
	151	if (Section.Find("Priority",Start,Stop) == true)
	152	{
6c139d6e AL	153	WordList PrioList[] = {{"important",pkgCache::State::Important},
	154	{"required",pkgCache::State::Required},
	155	{"standard",pkgCache::State::Standard},
	156	{"optional",pkgCache::State::Optional},
	157	{"extra",pkgCache::State::Extra}};
0149949b AL	158	if (GrabWord(string(Start,Stop-Start),PrioList,
	159	_count(PrioList),Ver->Priority) == false)
	160	return _error->Error("Malformed Priority line");
	161	}
dcb79bae	162
6c139d6e	163	if (ParseDepends(Ver,"Depends",pkgCache::Dep::Depends) == false)
dcb79bae	164	return false;
8efa2a3b	165	if (ParseDepends(Ver,"Pre-Depends",pkgCache::Dep::PreDepends) == false)
dcb79bae	166	return false;
6c139d6e	167	if (ParseDepends(Ver,"Suggests",pkgCache::Dep::Suggests) == false)
dcb79bae	168	return false;
6c139d6e	169	if (ParseDepends(Ver,"Recommends",pkgCache::Dep::Recommends) == false)
dcb79bae	170	return false;
6c139d6e	171	if (ParseDepends(Ver,"Conflicts",pkgCache::Dep::Conflicts) == false)
dcb79bae	172	return false;
6c139d6e	173	if (ParseDepends(Ver,"Replaces",pkgCache::Dep::Depends) == false)
dcb79bae AL	174	return false;
	175
	176	if (ParseProvides(Ver) == false)
	177	return false;
0149949b	178
f55a958f AL	179	return true;
	180	}
	181	/}}}/
	182	// ListParser::UsePackage - Update a package structure /{{{/
	183	// ---------------------------------------------------------------------
	184	/* This is called to update the package with any new information
	185	that might be found in the section */
	186	bool debListParser::UsePackage(pkgCache::PkgIterator Pkg,
	187	pkgCache::VerIterator Ver)
	188	{
	189	if (Pkg->Section == 0)
	190	if ((Pkg->Section = UniqFindTagWrite("Section")) == 0)
	191	return false;
6c139d6e	192	if (HandleFlag("Essential",Pkg->Flags,pkgCache::Flag::Essential) == false)
f55a958f	193	return false;
6c139d6e	194	if (HandleFlag("Immediate-Configure",Pkg->Flags,pkgCache::Flag::ImmediateConf) == false)
f55a958f AL	195	return false;
	196	if (ParseStatus(Pkg,Ver) == false)
	197	return false;
	198	return true;
	199	}
	200	/}}}/
dcb79bae	201	// ListParser::ParseStatus - Parse the status field /{{{/
f55a958f AL	202	// ---------------------------------------------------------------------
	203	/* Status lines are of the form,
	204	Status: want flag status
	205	want = unknown, install, hold, deinstall, purge
	206	flag = ok, reinstreq, hold, hold-reinstreq
	207	status = not-installed, unpacked, half-configured, uninstalled,
	208	half-installed, config-files, post-inst-failed,
	209	removal-failed, installed
	210
	211	Some of the above are obsolete (I think?) flag = hold-* and
	212	status = post-inst-failed, removal-failed at least.
	213	*/
	214	bool debListParser::ParseStatus(pkgCache::PkgIterator Pkg,
	215	pkgCache::VerIterator Ver)
	216	{
	217	const char *Start;
	218	const char *Stop;
	219	if (Section.Find("Status",Start,Stop) == false)
	220	return true;
	221
	222	// Isolate the first word
	223	const char *I = Start;
	224	for(; I < Stop && *I != ' '; I++);
	225	if (I >= Stop \|\| *I != ' ')
	226	return _error->Error("Malformed Status line");
	227
	228	// Process the want field
6c139d6e AL	229	WordList WantList[] = {{"unknown",pkgCache::State::Unknown},
	230	{"install",pkgCache::State::Install},
	231	{"hold",pkgCache::State::Hold},
	232	{"deinstall",pkgCache::State::DeInstall},
	233	{"purge",pkgCache::State::Purge}};
f55a958f AL	234	if (GrabWord(string(Start,I-Start),WantList,
	235	_count(WantList),Pkg->SelectedState) == false)
	236	return _error->Error("Malformed 1st word in the Status line");
	237
	238	// Isloate the next word
	239	I++;
	240	Start = I;
	241	for(; I < Stop && *I != ' '; I++);
	242	if (I >= Stop \|\| *I != ' ')
	243	return _error->Error("Malformed status line, no 2nd word");
	244
	245	// Process the flag field
6c139d6e AL	246	WordList FlagList[] = {{"ok",pkgCache::State::Ok},
	247	{"reinstreq",pkgCache::State::ReInstReq},
	248	{"hold",pkgCache::State::HoldInst},
	249	{"hold-reinstreq",pkgCache::State::HoldReInstReq}};
f55a958f AL	250	if (GrabWord(string(Start,I-Start),FlagList,
	251	_count(FlagList),Pkg->InstState) == false)
	252	return _error->Error("Malformed 2nd word in the Status line");
	253
	254	// Isloate the last word
	255	I++;
	256	Start = I;
	257	for(; I < Stop && *I != ' '; I++);
	258	if (I != Stop)
	259	return _error->Error("Malformed Status line, no 3rd word");
	260
	261	// Process the flag field
6c139d6e AL	262	WordList StatusList[] = {{"not-installed",pkgCache::State::NotInstalled},
	263	{"unpacked",pkgCache::State::UnPacked},
	264	{"half-configured",pkgCache::State::HalfConfigured},
	265	{"installed",pkgCache::State::Installed},
	266	{"uninstalled",pkgCache::State::UnInstalled},
	267	{"half-installed",pkgCache::State::HalfInstalled},
	268	{"config-files",pkgCache::State::ConfigFiles},
	269	{"post-inst-failed",pkgCache::State::HalfConfigured},
	270	{"removal-failed",pkgCache::State::HalfInstalled}};
f55a958f AL	271	if (GrabWord(string(Start,I-Start),StatusList,
	272	_count(StatusList),Pkg->CurrentState) == false)
	273	return _error->Error("Malformed 3rd word in the Status line");
	274
	275	/* A Status line marks the package as indicating the current
	276	version as well. Only if it is actually installed.. Otherwise
	277	the interesting dpkg handling of the status file creates bogus
	278	entries. */
6c139d6e AL	279	if (!(Pkg->CurrentState == pkgCache::State::NotInstalled \|\|
6c139d6e AL	280	Pkg->CurrentState == pkgCache::State::ConfigFiles))
f55a958f AL	281	{
	282	if (Ver.end() == true)
	283	_error->Warning("Encountered status field in a non-version description");
	284	else
	285	Pkg->CurrentVer = Ver.Index();
	286	}
	287
dcb79bae AL	288	return true;
	289	}
	290	/}}}/
	291	// ListParser::ParseDepends - Parse a dependency element /{{{/
	292	// ---------------------------------------------------------------------
	293	/* This parses the dependency elements out of a standard string in place,
	294	bit by bit. */
	295	const char debListParser::ParseDepends(const char Start,const char *Stop,
	296	string &Package,string &Ver,
	297	unsigned int &Op)
	298	{
	299	// Strip off leading space
	300	for (;Start != Stop && isspace(*Start) != 0; Start++);
	301
	302	// Parse off the package name
	303	const char *I = Start;
	304	for (;I != Stop && isspace(I) == 0 && I != '(' && *I != ')' &&
	305	I != ',' && I != '\|'; I++);
	306
	307	// Malformed, no '('
	308	if (I != Stop && *I == ')')
	309	return 0;
	310
	311	if (I == Start)
	312	return 0;
	313
	314	// Stash the package name
	315	Package.assign(Start,I - Start);
	316
	317	// Skip white space to the '('
	318	for (;I != Stop && isspace(*I) != 0 ; I++);
	319
	320	// Parse a version
	321	if (I != Stop && *I == '(')
	322	{
	323	// Skip the '('
	324	for (I++; I != Stop && isspace(*I) != 0 ; I++);
	325	if (I + 3 >= Stop)
	326	return 0;
	327
	328	// Determine the operator
	329	switch (*I)
	330	{
	331	case '<':
	332	I++;
	333	if (*I == '=')
	334	{
	335	I++;
6c139d6e	336	Op = pkgCache::Dep::LessEq;
dcb79bae AL	337	break;
	338	}
	339
	340	if (*I == '<')
	341	{
	342	I++;
6c139d6e	343	Op = pkgCache::Dep::Less;
dcb79bae AL	344	break;
	345	}
	346
	347	// < is the same as <= and << is really Cs < for some reason
6c139d6e	348	Op = pkgCache::Dep::LessEq;
dcb79bae AL	349	break;
	350
	351	case '>':
	352	I++;
	353	if (*I == '=')
	354	{
	355	I++;
6c139d6e	356	Op = pkgCache::Dep::GreaterEq;
dcb79bae AL	357	break;
	358	}
	359
	360	if (*I == '>')
	361	{
	362	I++;
6c139d6e	363	Op = pkgCache::Dep::Greater;
dcb79bae AL	364	break;
	365	}
	366
	367	// > is the same as >= and >> is really Cs > for some reason
6c139d6e	368	Op = pkgCache::Dep::GreaterEq;
dcb79bae AL	369	break;
	370
	371	case '=':
6c139d6e	372	Op = pkgCache::Dep::Equals;
dcb79bae AL	373	I++;
	374	break;
	375
	376	// HACK around bad package definitions
	377	default:
6c139d6e	378	Op = pkgCache::Dep::Equals;
dcb79bae AL	379	break;
	380	}
	381
	382	// Skip whitespace
	383	for (;I != Stop && isspace(*I) != 0; I++);
	384	Start = I;
	385	for (;I != Stop && *I != ')'; I++);
	386	if (I == Stop \|\| Start == I)
	387	return 0;
	388
	389	Ver = string(Start,I-Start);
	390	I++;
	391	}
	392	else
	393	{
	394	Ver = string();
6c139d6e	395	Op = pkgCache::Dep::NoOp;
dcb79bae AL	396	}
	397
	398	// Skip whitespace
	399	for (;I != Stop && isspace(*I) != 0; I++);
	400	if (I != Stop && *I == '\|')
6c139d6e	401	Op \|= pkgCache::Dep::Or;
dcb79bae AL	402
	403	if (I == Stop \|\| I == ',' \|\| I == '\|')
	404	{
	405	if (I != Stop)
	406	for (I++; I != Stop && isspace(*I) != 0; I++);
	407	return I;
	408	}
	409
	410	return 0;
	411	}
	412	/}}}/
	413	// ListParser::ParseDepends - Parse a dependency list /{{{/
	414	// ---------------------------------------------------------------------
	415	/* This is the higher level depends parser. It takes a tag and generates
	416	a complete depends tree for the given version. */
	417	bool debListParser::ParseDepends(pkgCache::VerIterator Ver,
	418	const char *Tag,unsigned int Type)
	419	{
	420	const char *Start;
	421	const char *Stop;
	422	if (Section.Find(Tag,Start,Stop) == false)
	423	return true;
	424
	425	string Package;
	426	string Version;
	427	unsigned int Op;
	428
8efa2a3b	429	while (1)
dcb79bae	430	{
8efa2a3b	431	Start = ParseDepends(Start,Stop,Package,Version,Op);
dcb79bae AL	432	if (Start == 0)
dcb79bae AL	433	return _error->Error("Problem parsing dependency %s",Tag);
8efa2a3b	434
dcb79bae AL	435	if (NewDepends(Ver,Package,Version,Op,Type) == false)
dcb79bae AL	436	return false;
8efa2a3b AL	437	if (Start == Stop)
8efa2a3b AL	438	break;
dcb79bae AL	439	}
	440	return true;
	441	}
	442	/}}}/
	443	// ListParser::ParseProvides - Parse the provides list /{{{/
	444	// ---------------------------------------------------------------------
	445	/* */
	446	bool debListParser::ParseProvides(pkgCache::VerIterator Ver)
	447	{
	448	const char *Start;
	449	const char *Stop;
	450	if (Section.Find("Provides",Start,Stop) == false)
	451	return true;
	452
	453	string Package;
	454	string Version;
	455	unsigned int Op;
	456
	457	while (1)
	458	{
	459	Start = ParseDepends(Start,Stop,Package,Version,Op);
	460	if (Start == 0)
	461	return _error->Error("Problem parsing Provides line");
6c139d6e	462	if (Op != pkgCache::Dep::NoOp)
dcb79bae AL	463	return _error->Error("Malformed provides line");
	464
	465	if (NewProvides(Ver,Package,Version) == false)
	466	return false;
	467
	468	if (Start == Stop)
	469	break;
	470	}
	471
f55a958f AL	472	return true;
	473	}
	474	/}}}/
	475	// ListParser::GrabWord - Matches a word and returns /{{{/
	476	// ---------------------------------------------------------------------
	477	/* Looks for a word in a list of words - for ParseStatus */
	478	bool debListParser::GrabWord(string Word,WordList *List,int Count,
	479	unsigned char &Out)
	480	{
	481	for (int C = 0; C != Count; C++)
	482	{
	483	if (strcasecmp(Word.c_str(),List[C].Str) == 0)
	484	{
	485	Out = List[C].Val;
	486	return true;
	487	}
	488	}
	489	return false;
	490	}
	491	/}}}/
	492	// ListParser::Step - Move to the next section in the file /{{{/
	493	// ---------------------------------------------------------------------
0149949b	494	/* This has to be carefull to only process the correct architecture */
f55a958f AL	495	bool debListParser::Step()
f55a958f AL	496	{
dcb79bae	497	iOffset = Tags.Offset();
9c14e3d6	498	string Arch = _config->Find("APT::architecture");
0149949b AL	499	while (Tags.Step(Section) == true)
	500	{
	501	/* See if this is the correct Architecture, if it isnt then we
	502	drop the whole section */
	503	const char *Start;
	504	const char *Stop;
	505	if (Section.Find("Architecture",Start,Stop) == false)
	506	return true;
9c14e3d6 AL	507
9c14e3d6 AL	508	if (stringcmp(Start,Stop,Arch.begin(),Arch.end()) == 0)
0149949b AL	509	return true;
0149949b AL	510
9c14e3d6	511	if (stringcmp(Start,Stop,"all") == 0)
0149949b	512	return true;
dcb79bae AL	513
dcb79bae AL	514	iOffset = Tags.Offset();
0149949b AL	515	}
0149949b AL	516	return false;
f55a958f AL	517	}
f55a958f AL	518	/}}}/