[apt.git] / apt-pkg / versionmatch.cc

// -*- mode: cpp; mode: fold -*-
// Description								/*{{{*/
// $Id: versionmatch.cc,v 1.9 2003/05/19 17:58:26 doogie Exp $
/* ######################################################################

   Version Matching 
   
   This module takes a matching string and a type and locates the version
   record that satisfies the constraint described by the matching string.
   
   ##################################################################### */
									/*}}}*/
// Include Files							/*{{{*/
#include<config.h>

#include <apt-pkg/versionmatch.h>
#include <apt-pkg/strutl.h>
#include <apt-pkg/error.h>

#include <stdio.h>
#include <ctype.h>
#include <fnmatch.h>
#include <sys/types.h>
#include <regex.h>
									/*}}}*/

using std::string;

// VersionMatch::pkgVersionMatch - Constructor				/*{{{*/
// ---------------------------------------------------------------------
/* Break up the data string according to the selected type */
pkgVersionMatch::pkgVersionMatch(string Data,MatchType Type) : Type(Type)
{
   MatchAll = false;
   VerPrefixMatch = false;
   RelVerPrefixMatch = false;
   
   if (Type == None || Data.length() < 1)
      return;
   
   // Cut up the version representation
   if (Type == Version)
   {
      if (Data.end()[-1] == '*')
      {
	 VerPrefixMatch = true;
	 VerStr = string(Data,0,Data.length()-1);
      }
      else
	 VerStr = Data;
      return;
   }   
   
   if (Type == Release)
   {
      // All empty = match all
      if (Data == "*")
      {
	 MatchAll = true;
	 return;
      }
      
      // Are we a simple specification?
      string::const_iterator I = Data.begin();
      for (; I != Data.end() && *I != '='; ++I);
      if (I == Data.end())
      {
	 // Temporary
	 if (isdigit(Data[0]))
	    RelVerStr = Data;
	 else
	    RelRelease = Data;

	 if (RelVerStr.length() > 0 && RelVerStr.end()[-1] == '*')
	 {
	    RelVerPrefixMatch = true;
	    RelVerStr = string(RelVerStr.begin(),RelVerStr.end()-1);
	 }	 
	 return;
      }
            
      char Spec[300];
      char *Fragments[20];
      snprintf(Spec,sizeof(Spec),"%s",Data.c_str());
      if (TokSplitString(',',Spec,Fragments,
			 sizeof(Fragments)/sizeof(Fragments[0])) == false)
      {
	 Type = None;
	 return;
      }
      
      for (unsigned J = 0; Fragments[J] != 0; J++)
      {
	 if (strlen(Fragments[J]) < 3)
	    continue;

	 if (stringcasecmp(Fragments[J],Fragments[J]+2,"v=") == 0)
	    RelVerStr = Fragments[J]+2;
	 else if (stringcasecmp(Fragments[J],Fragments[J]+2,"o=") == 0)
	    RelOrigin = Fragments[J]+2;
	 else if (stringcasecmp(Fragments[J],Fragments[J]+2,"a=") == 0)
	    RelArchive = Fragments[J]+2;
	 else if (stringcasecmp(Fragments[J],Fragments[J]+2,"n=") == 0)
	    RelCodename = Fragments[J]+2;
	 else if (stringcasecmp(Fragments[J],Fragments[J]+2,"l=") == 0)
	    RelLabel = Fragments[J]+2;
	 else if (stringcasecmp(Fragments[J],Fragments[J]+2,"c=") == 0)
	    RelComponent = Fragments[J]+2;
	 else if (stringcasecmp(Fragments[J],Fragments[J]+2,"b=") == 0)
	    RelArchitecture = Fragments[J]+2;
      }

      if (RelVerStr.end()[-1] == '*')
      {
	 RelVerPrefixMatch = true;
	 RelVerStr = string(RelVerStr.begin(),RelVerStr.end()-1);
      }	 
      return;
   }
   
   if (Type == Origin)
   {
      if (Data[0] == '"' && Data.length() >= 2 && Data.end()[-1] == '"')
	 OrSite = Data.substr(1, Data.length() - 2);
      else
	 OrSite = Data;
      return;
   }   
}
									/*}}}*/
// VersionMatch::MatchVer - Match a version string with prefixing	/*{{{*/
// ---------------------------------------------------------------------
/* */
bool pkgVersionMatch::MatchVer(const char *A,string B,bool Prefix)
{   
   const char *Ab = A;
   const char *Ae = Ab + strlen(A);
   
   // Strings are not a compatible size.
   if (((unsigned)(Ae - Ab) != B.length() && Prefix == false) ||
       (unsigned)(Ae - Ab) < B.length())
      return false;
   
   // Match (leading?)
   if (stringcasecmp(B,Ab,Ab + B.length()) == 0)
      return true;
   
   return false;
}
									/*}}}*/
// VersionMatch::Find - Locate the best match for the select type	/*{{{*/
// ---------------------------------------------------------------------
/* */
pkgCache::VerIterator pkgVersionMatch::Find(pkgCache::PkgIterator Pkg)
{
   pkgCache::VerIterator Ver = Pkg.VersionList();
   for (; Ver.end() == false; ++Ver)
   {
      if (Type == Version)
      {
	 if (MatchVer(Ver.VerStr(),VerStr,VerPrefixMatch) == true)
	    return Ver;
	 if (ExpressionMatches(VerStr, Ver.VerStr()) == true)
	    return Ver;
	 continue;
      }
      
      for (pkgCache::VerFileIterator VF = Ver.FileList(); VF.end() == false; ++VF)
	 if (FileMatch(VF.File()) == true)
	    return Ver;
   }
      
   // This will be Ended by now.
   return Ver;
}

#ifndef FNM_CASEFOLD
#define FNM_CASEFOLD 0
#endif

bool pkgVersionMatch::ExpressionMatches(const char *pattern, const char *string)
{
   if (pattern[0] == '/') {
      size_t length = strlen(pattern);
      if (pattern[length - 1] == '/') {
	 bool res = false;
	 regex_t preg;
	 char *regex = strdup(pattern + 1);
	 regex[length - 2] = '\0';
	 if (regcomp(&preg, regex, REG_EXTENDED | REG_ICASE) != 0) {
	    _error->Warning("Invalid regular expression: %s", regex);
	 } else if (regexec(&preg, string, 0, NULL, 0) == 0) {
	    res = true;
	 }
	 free(regex);
	 regfree(&preg);
	 return res;
      }
   }
   return fnmatch(pattern, string, FNM_CASEFOLD) == 0;
}
bool pkgVersionMatch::ExpressionMatches(const std::string& pattern, const char *string)
{
    return ExpressionMatches(pattern.c_str(), string);
}
									/*}}}*/
// VersionMatch::FileMatch - Match against an index file		/*{{{*/
// ---------------------------------------------------------------------
/* This matcher checks against the release file and the origin location 
   to see if the constraints are met. */
bool pkgVersionMatch::FileMatch(pkgCache::PkgFileIterator File)
{
   if (Type == Release)
   {
      if (MatchAll == true)
	 return true;

/*      cout << RelVerStr << ',' << RelOrigin << ',' << RelArchive << ',' << RelLabel << endl;
      cout << File.Version() << ',' << File.Origin() << ',' << File.Archive() << ',' << File.Label() << endl;*/

      if (RelVerStr.empty() == true && RelOrigin.empty() == true &&
	  RelArchive.empty() == true && RelLabel.empty() == true &&
	  RelRelease.empty() == true && RelCodename.empty() == true &&
	  RelComponent.empty() == true && RelArchitecture.empty() == true)
	 return false;

      if (RelVerStr.empty() == false)
	 if (File->Version == 0 ||
	     (MatchVer(File.Version(),RelVerStr,RelVerPrefixMatch) == false &&
	      ExpressionMatches(RelVerStr, File.Version()) == false))
	    return false;
      if (RelOrigin.empty() == false)
	 if (File->Origin == 0 || !ExpressionMatches(RelOrigin,File.Origin()))
	    return false;
      if (RelArchive.empty() == false)
	 if (File->Archive == 0 ||
	     !ExpressionMatches(RelArchive,File.Archive()))
            return false;
      if (RelCodename.empty() == false)
	 if (File->Codename == 0 ||
	     !ExpressionMatches(RelCodename,File.Codename()))
            return false;
      if (RelRelease.empty() == false)
	 if ((File->Archive == 0 ||
	     !ExpressionMatches(RelRelease,File.Archive())) &&
             (File->Codename == 0 ||
	      !ExpressionMatches(RelRelease,File.Codename())))
	       return false;
      if (RelLabel.empty() == false)
	 if (File->Label == 0 ||
	     !ExpressionMatches(RelLabel,File.Label()))
	    return false;
      if (RelComponent.empty() == false)
	 if (File->Component == 0 ||
	     !ExpressionMatches(RelComponent,File.Component()))
	    return false;
      if (RelArchitecture.empty() == false)
	 if (File->Architecture == 0 ||
	     !ExpressionMatches(RelArchitecture,File.Architecture()))
	    return false;
      return true;
   }

   if (Type == Origin)
   {
      if (OrSite.empty() == false) {
	 if (File->Site == 0)
	    return false;
      } else // so we are talking about file:// or status file
	 if (strcmp(File.Site(),"") == 0 && File->Archive != 0 && strcmp(File.Archive(),"now") == 0) // skip the status file
	    return false;
      return (ExpressionMatches(OrSite, File.Site())); /* both strings match */
   }

   return false;
}
									/*}}}*/
Commit	Line	Data
b2e465d6 AL	1	// -- mode: cpp; mode: fold --
b2e465d6 AL	2	// Description /{{{/
acfe7306	3	// $Id: versionmatch.cc,v 1.9 2003/05/19 17:58:26 doogie Exp $
b2e465d6 AL	4	/* ######################################################################
	5
	6	Version Matching
	7
	8	This module takes a matching string and a type and locates the version
	9	record that satisfies the constraint described by the matching string.
	10
	11	##################################################################### */
	12	/}}}/
	13	// Include Files /{{{/
ea542140	14	#include<config.h>
b2e465d6	15
ea542140	16	#include <apt-pkg/versionmatch.h>
b2e465d6 AL	17	#include <apt-pkg/strutl.h>
	18	#include <apt-pkg/error.h>
	19
	20	#include <stdio.h>
8d9850a1	21	#include <ctype.h>
ae4a4f91 JAK	22	#include <fnmatch.h>
	23	#include <sys/types.h>
	24	#include <regex.h>
b2e465d6 AL	25	/}}}/
b2e465d6 AL	26
8f3ba4e8 DK	27	using std::string;
8f3ba4e8 DK	28
b2e465d6 AL	29	// VersionMatch::pkgVersionMatch - Constructor /{{{/
	30	// ---------------------------------------------------------------------
	31	/* Break up the data string according to the selected type */
	32	pkgVersionMatch::pkgVersionMatch(string Data,MatchType Type) : Type(Type)
	33	{
4e0680f9 AL	34	MatchAll = false;
	35	VerPrefixMatch = false;
	36	RelVerPrefixMatch = false;
	37
b2e465d6 AL	38	if (Type == None \|\| Data.length() < 1)
	39	return;
	40
	41	// Cut up the version representation
	42	if (Type == Version)
	43	{
	44	if (Data.end()[-1] == '*')
	45	{
	46	VerPrefixMatch = true;
8d9850a1	47	VerStr = string(Data,0,Data.length()-1);
b2e465d6 AL	48	}
	49	else
	50	VerStr = Data;
	51	return;
	52	}
	53
	54	if (Type == Release)
	55	{
	56	// All empty = match all
	57	if (Data == "*")
0a5e4a03 AL	58	{
0a5e4a03 AL	59	MatchAll = true;
b2e465d6	60	return;
0a5e4a03 AL	61	}
0a5e4a03 AL	62
b2e465d6	63	// Are we a simple specification?
8d9850a1	64	string::const_iterator I = Data.begin();
f7f0d6c7	65	for (; I != Data.end() && *I != '='; ++I);
b2e465d6 AL	66	if (I == Data.end())
	67	{
	68	// Temporary
	69	if (isdigit(Data[0]))
	70	RelVerStr = Data;
	71	else
efc487fb DK	72	RelRelease = Data;
efc487fb DK	73
b8b7c37d	74	if (RelVerStr.length() > 0 && RelVerStr.end()[-1] == '*')
b2e465d6 AL	75	{
	76	RelVerPrefixMatch = true;
	77	RelVerStr = string(RelVerStr.begin(),RelVerStr.end()-1);
	78	}
	79	return;
	80	}
	81
	82	char Spec[300];
	83	char *Fragments[20];
	84	snprintf(Spec,sizeof(Spec),"%s",Data.c_str());
	85	if (TokSplitString(',',Spec,Fragments,
	86	sizeof(Fragments)/sizeof(Fragments[0])) == false)
	87	{
	88	Type = None;
	89	return;
	90	}
	91
	92	for (unsigned J = 0; Fragments[J] != 0; J++)
	93	{
	94	if (strlen(Fragments[J]) < 3)
	95	continue;
efc487fb	96
b2e465d6 AL	97	if (stringcasecmp(Fragments[J],Fragments[J]+2,"v=") == 0)
	98	RelVerStr = Fragments[J]+2;
	99	else if (stringcasecmp(Fragments[J],Fragments[J]+2,"o=") == 0)
	100	RelOrigin = Fragments[J]+2;
	101	else if (stringcasecmp(Fragments[J],Fragments[J]+2,"a=") == 0)
	102	RelArchive = Fragments[J]+2;
efc487fb DK	103	else if (stringcasecmp(Fragments[J],Fragments[J]+2,"n=") == 0)
efc487fb DK	104	RelCodename = Fragments[J]+2;
b2e465d6 AL	105	else if (stringcasecmp(Fragments[J],Fragments[J]+2,"l=") == 0)
	106	RelLabel = Fragments[J]+2;
	107	else if (stringcasecmp(Fragments[J],Fragments[J]+2,"c=") == 0)
	108	RelComponent = Fragments[J]+2;
5dd4c8b8 DK	109	else if (stringcasecmp(Fragments[J],Fragments[J]+2,"b=") == 0)
5dd4c8b8 DK	110	RelArchitecture = Fragments[J]+2;
b2e465d6	111	}
efc487fb	112
b2e465d6 AL	113	if (RelVerStr.end()[-1] == '*')
	114	{
	115	RelVerPrefixMatch = true;
	116	RelVerStr = string(RelVerStr.begin(),RelVerStr.end()-1);
	117	}
	118	return;
	119	}
	120
	121	if (Type == Origin)
	122	{
99aa69c7	123	if (Data[0] == '"' && Data.length() >= 2 && Data.end()[-1] == '"')
ba91b151 DK	124	OrSite = Data.substr(1, Data.length() - 2);
	125	else
	126	OrSite = Data;
b2e465d6 AL	127	return;
	128	}
	129	}
	130	/}}}/
	131	// VersionMatch::MatchVer - Match a version string with prefixing /{{{/
	132	// ---------------------------------------------------------------------
	133	/* */
	134	bool pkgVersionMatch::MatchVer(const char *A,string B,bool Prefix)
	135	{
	136	const char *Ab = A;
	137	const char *Ae = Ab + strlen(A);
	138
	139	// Strings are not a compatible size.
d320fdc3	140	if (((unsigned)(Ae - Ab) != B.length() && Prefix == false) \|\|
b2e465d6 AL	141	(unsigned)(Ae - Ab) < B.length())
	142	return false;
	143
	144	// Match (leading?)
8d9850a1	145	if (stringcasecmp(B,Ab,Ab + B.length()) == 0)
b2e465d6 AL	146	return true;
	147
	148	return false;
	149	}
	150	/}}}/
	151	// VersionMatch::Find - Locate the best match for the select type /{{{/
	152	// ---------------------------------------------------------------------
	153	/* */
	154	pkgCache::VerIterator pkgVersionMatch::Find(pkgCache::PkgIterator Pkg)
	155	{
	156	pkgCache::VerIterator Ver = Pkg.VersionList();
f7f0d6c7	157	for (; Ver.end() == false; ++Ver)
b2e465d6 AL	158	{
	159	if (Type == Version)
	160	{
	161	if (MatchVer(Ver.VerStr(),VerStr,VerPrefixMatch) == true)
	162	return Ver;
05002864 JAK	163	if (ExpressionMatches(VerStr, Ver.VerStr()) == true)
05002864 JAK	164	return Ver;
b2e465d6 AL	165	continue;
	166	}
	167
f7f0d6c7	168	for (pkgCache::VerFileIterator VF = Ver.FileList(); VF.end() == false; ++VF)
b2e465d6 AL	169	if (FileMatch(VF.File()) == true)
	170	return Ver;
	171	}
	172
	173	// This will be Ended by now.
	174	return Ver;
	175	}
ae4a4f91 JAK	176
	177	#ifndef FNM_CASEFOLD
	178	#define FNM_CASEFOLD 0
	179	#endif
	180
	181	bool pkgVersionMatch::ExpressionMatches(const char pattern, const char string)
	182	{
ae4a4f91	183	if (pattern[0] == '/') {
ae4a4f91 JAK	184	size_t length = strlen(pattern);
ae4a4f91 JAK	185	if (pattern[length - 1] == '/') {
69c2ecbd	186	bool res = false;
ae4a4f91 JAK	187	regex_t preg;
	188	char *regex = strdup(pattern + 1);
	189	regex[length - 2] = '\0';
	190	if (regcomp(&preg, regex, REG_EXTENDED \| REG_ICASE) != 0) {
4213f040	191	_error->Warning("Invalid regular expression: %s", regex);
ae4a4f91 JAK	192	} else if (regexec(&preg, string, 0, NULL, 0) == 0) {
	193	res = true;
	194	}
	195	free(regex);
cec9f4f4	196	regfree(&preg);
ae4a4f91 JAK	197	return res;
	198	}
	199	}
	200	return fnmatch(pattern, string, FNM_CASEFOLD) == 0;
	201	}
	202	bool pkgVersionMatch::ExpressionMatches(const std::string& pattern, const char *string)
	203	{
	204	return ExpressionMatches(pattern.c_str(), string);
	205	}
b2e465d6 AL	206	/}}}/
	207	// VersionMatch::FileMatch - Match against an index file /{{{/
	208	// ---------------------------------------------------------------------
	209	/* This matcher checks against the release file and the origin location
	210	to see if the constraints are met. */
	211	bool pkgVersionMatch::FileMatch(pkgCache::PkgFileIterator File)
	212	{
	213	if (Type == Release)
	214	{
0a5e4a03 AL	215	if (MatchAll == true)
0a5e4a03 AL	216	return true;
efc487fb	217
b2e465d6	218	/* cout << RelVerStr << ',' << RelOrigin << ',' << RelArchive << ',' << RelLabel << endl;
af87ab54	219	cout << File.Version() << ',' << File.Origin() << ',' << File.Archive() << ',' << File.Label() << endl;*/
efc487fb	220
b2e465d6 AL	221	if (RelVerStr.empty() == true && RelOrigin.empty() == true &&
b2e465d6 AL	222	RelArchive.empty() == true && RelLabel.empty() == true &&
efc487fb	223	RelRelease.empty() == true && RelCodename.empty() == true &&
5dd4c8b8	224	RelComponent.empty() == true && RelArchitecture.empty() == true)
b2e465d6	225	return false;
efc487fb	226
b2e465d6 AL	227	if (RelVerStr.empty() == false)
b2e465d6 AL	228	if (File->Version == 0 \|\|
ae4a4f91 JAK	229	(MatchVer(File.Version(),RelVerStr,RelVerPrefixMatch) == false &&
ae4a4f91 JAK	230	ExpressionMatches(RelVerStr, File.Version()) == false))
b2e465d6 AL	231	return false;
b2e465d6 AL	232	if (RelOrigin.empty() == false)
ae4a4f91	233	if (File->Origin == 0 \|\| !ExpressionMatches(RelOrigin,File.Origin()))
b2e465d6 AL	234	return false;
b2e465d6 AL	235	if (RelArchive.empty() == false)
efc487fb	236	if (File->Archive == 0 \|\|
ae4a4f91	237	!ExpressionMatches(RelArchive,File.Archive()))
efc487fb DK	238	return false;
	239	if (RelCodename.empty() == false)
	240	if (File->Codename == 0 \|\|
ae4a4f91	241	!ExpressionMatches(RelCodename,File.Codename()))
efc487fb DK	242	return false;
	243	if (RelRelease.empty() == false)
	244	if ((File->Archive == 0 \|\|
ae4a4f91	245	!ExpressionMatches(RelRelease,File.Archive())) &&
efc487fb	246	(File->Codename == 0 \|\|
ae4a4f91	247	!ExpressionMatches(RelRelease,File.Codename())))
efc487fb	248	return false;
b2e465d6 AL	249	if (RelLabel.empty() == false)
b2e465d6 AL	250	if (File->Label == 0 \|\|
ae4a4f91	251	!ExpressionMatches(RelLabel,File.Label()))
b2e465d6 AL	252	return false;
	253	if (RelComponent.empty() == false)
	254	if (File->Component == 0 \|\|
ae4a4f91	255	!ExpressionMatches(RelComponent,File.Component()))
b2e465d6	256	return false;
5dd4c8b8 DK	257	if (RelArchitecture.empty() == false)
5dd4c8b8 DK	258	if (File->Architecture == 0 \|\|
ae4a4f91	259	!ExpressionMatches(RelArchitecture,File.Architecture()))
5dd4c8b8	260	return false;
b2e465d6 AL	261	return true;
b2e465d6 AL	262	}
efc487fb	263
b2e465d6 AL	264	if (Type == Origin)
b2e465d6 AL	265	{
acfe7306	266	if (OrSite.empty() == false) {
ba91b151	267	if (File->Site == 0)
acfe7306 AL	268	return false;
acfe7306 AL	269	} else // so we are talking about file:// or status file
ba91b151	270	if (strcmp(File.Site(),"") == 0 && File->Archive != 0 && strcmp(File.Archive(),"now") == 0) // skip the status file
acfe7306	271	return false;
ae4a4f91	272	return (ExpressionMatches(OrSite, File.Site())); /* both strings match */
b2e465d6	273	}
efc487fb	274
b2e465d6 AL	275	return false;
	276	}
	277	/}}}/