[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 <apt-pkg/pkgcache.h>
#include <apt-pkg/cacheiterators.h>

#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <string>
#include <stdio.h>
#include <ctype.h>
#include <fnmatch.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>
b2e465d6 AL	18	#include <apt-pkg/error.h>
453b82a3 DK	19	#include <apt-pkg/pkgcache.h>
453b82a3 DK	20	#include <apt-pkg/cacheiterators.h>
b2e465d6	21
453b82a3 DK	22	#include <stddef.h>
	23	#include <stdlib.h>
	24	#include <string.h>
	25	#include <string>
b2e465d6	26	#include <stdio.h>
8d9850a1	27	#include <ctype.h>
ae4a4f91	28	#include <fnmatch.h>
ae4a4f91	29	#include <regex.h>
b2e465d6 AL	30	/}}}/
b2e465d6 AL	31
8f3ba4e8 DK	32	using std::string;
8f3ba4e8 DK	33
b2e465d6 AL	34	// VersionMatch::pkgVersionMatch - Constructor /{{{/
	35	// ---------------------------------------------------------------------
	36	/* Break up the data string according to the selected type */
	37	pkgVersionMatch::pkgVersionMatch(string Data,MatchType Type) : Type(Type)
	38	{
4e0680f9 AL	39	MatchAll = false;
	40	VerPrefixMatch = false;
	41	RelVerPrefixMatch = false;
	42
b2e465d6 AL	43	if (Type == None \|\| Data.length() < 1)
	44	return;
	45
	46	// Cut up the version representation
	47	if (Type == Version)
	48	{
	49	if (Data.end()[-1] == '*')
	50	{
	51	VerPrefixMatch = true;
8d9850a1	52	VerStr = string(Data,0,Data.length()-1);
b2e465d6 AL	53	}
	54	else
	55	VerStr = Data;
	56	return;
	57	}
	58
	59	if (Type == Release)
	60	{
	61	// All empty = match all
	62	if (Data == "*")
0a5e4a03 AL	63	{
0a5e4a03 AL	64	MatchAll = true;
b2e465d6	65	return;
0a5e4a03 AL	66	}
0a5e4a03 AL	67
b2e465d6	68	// Are we a simple specification?
8d9850a1	69	string::const_iterator I = Data.begin();
f7f0d6c7	70	for (; I != Data.end() && *I != '='; ++I);
b2e465d6 AL	71	if (I == Data.end())
	72	{
	73	// Temporary
	74	if (isdigit(Data[0]))
	75	RelVerStr = Data;
	76	else
efc487fb DK	77	RelRelease = Data;
efc487fb DK	78
b8b7c37d	79	if (RelVerStr.length() > 0 && RelVerStr.end()[-1] == '*')
b2e465d6 AL	80	{
	81	RelVerPrefixMatch = true;
	82	RelVerStr = string(RelVerStr.begin(),RelVerStr.end()-1);
	83	}
	84	return;
	85	}
	86
	87	char Spec[300];
	88	char *Fragments[20];
	89	snprintf(Spec,sizeof(Spec),"%s",Data.c_str());
	90	if (TokSplitString(',',Spec,Fragments,
	91	sizeof(Fragments)/sizeof(Fragments[0])) == false)
	92	{
	93	Type = None;
	94	return;
	95	}
	96
	97	for (unsigned J = 0; Fragments[J] != 0; J++)
	98	{
	99	if (strlen(Fragments[J]) < 3)
	100	continue;
efc487fb	101
b2e465d6 AL	102	if (stringcasecmp(Fragments[J],Fragments[J]+2,"v=") == 0)
	103	RelVerStr = Fragments[J]+2;
	104	else if (stringcasecmp(Fragments[J],Fragments[J]+2,"o=") == 0)
	105	RelOrigin = Fragments[J]+2;
	106	else if (stringcasecmp(Fragments[J],Fragments[J]+2,"a=") == 0)
	107	RelArchive = Fragments[J]+2;
efc487fb DK	108	else if (stringcasecmp(Fragments[J],Fragments[J]+2,"n=") == 0)
efc487fb DK	109	RelCodename = Fragments[J]+2;
b2e465d6 AL	110	else if (stringcasecmp(Fragments[J],Fragments[J]+2,"l=") == 0)
	111	RelLabel = Fragments[J]+2;
	112	else if (stringcasecmp(Fragments[J],Fragments[J]+2,"c=") == 0)
	113	RelComponent = Fragments[J]+2;
5dd4c8b8 DK	114	else if (stringcasecmp(Fragments[J],Fragments[J]+2,"b=") == 0)
5dd4c8b8 DK	115	RelArchitecture = Fragments[J]+2;
b2e465d6	116	}
efc487fb	117
b2e465d6 AL	118	if (RelVerStr.end()[-1] == '*')
	119	{
	120	RelVerPrefixMatch = true;
	121	RelVerStr = string(RelVerStr.begin(),RelVerStr.end()-1);
	122	}
	123	return;
	124	}
	125
	126	if (Type == Origin)
	127	{
99aa69c7	128	if (Data[0] == '"' && Data.length() >= 2 && Data.end()[-1] == '"')
ba91b151 DK	129	OrSite = Data.substr(1, Data.length() - 2);
	130	else
	131	OrSite = Data;
b2e465d6 AL	132	return;
	133	}
	134	}
	135	/}}}/
	136	// VersionMatch::MatchVer - Match a version string with prefixing /{{{/
	137	// ---------------------------------------------------------------------
	138	/* */
	139	bool pkgVersionMatch::MatchVer(const char *A,string B,bool Prefix)
	140	{
	141	const char *Ab = A;
	142	const char *Ae = Ab + strlen(A);
	143
	144	// Strings are not a compatible size.
d320fdc3	145	if (((unsigned)(Ae - Ab) != B.length() && Prefix == false) \|\|
b2e465d6 AL	146	(unsigned)(Ae - Ab) < B.length())
	147	return false;
	148
	149	// Match (leading?)
8d9850a1	150	if (stringcasecmp(B,Ab,Ab + B.length()) == 0)
b2e465d6 AL	151	return true;
	152
	153	return false;
	154	}
	155	/}}}/
	156	// VersionMatch::Find - Locate the best match for the select type /{{{/
	157	// ---------------------------------------------------------------------
	158	/* */
	159	pkgCache::VerIterator pkgVersionMatch::Find(pkgCache::PkgIterator Pkg)
	160	{
	161	pkgCache::VerIterator Ver = Pkg.VersionList();
f7f0d6c7	162	for (; Ver.end() == false; ++Ver)
b2e465d6 AL	163	{
	164	if (Type == Version)
	165	{
	166	if (MatchVer(Ver.VerStr(),VerStr,VerPrefixMatch) == true)
	167	return Ver;
05002864 JAK	168	if (ExpressionMatches(VerStr, Ver.VerStr()) == true)
05002864 JAK	169	return Ver;
b2e465d6 AL	170	continue;
	171	}
	172
f7f0d6c7	173	for (pkgCache::VerFileIterator VF = Ver.FileList(); VF.end() == false; ++VF)
b2e465d6 AL	174	if (FileMatch(VF.File()) == true)
	175	return Ver;
	176	}
	177
	178	// This will be Ended by now.
	179	return Ver;
	180	}
ae4a4f91 JAK	181
	182	#ifndef FNM_CASEFOLD
	183	#define FNM_CASEFOLD 0
	184	#endif
	185
	186	bool pkgVersionMatch::ExpressionMatches(const char pattern, const char string)
	187	{
ae4a4f91	188	if (pattern[0] == '/') {
ae4a4f91 JAK	189	size_t length = strlen(pattern);
ae4a4f91 JAK	190	if (pattern[length - 1] == '/') {
69c2ecbd	191	bool res = false;
ae4a4f91 JAK	192	regex_t preg;
	193	char *regex = strdup(pattern + 1);
	194	regex[length - 2] = '\0';
	195	if (regcomp(&preg, regex, REG_EXTENDED \| REG_ICASE) != 0) {
4213f040	196	_error->Warning("Invalid regular expression: %s", regex);
ae4a4f91 JAK	197	} else if (regexec(&preg, string, 0, NULL, 0) == 0) {
	198	res = true;
	199	}
	200	free(regex);
cec9f4f4	201	regfree(&preg);
ae4a4f91 JAK	202	return res;
	203	}
	204	}
	205	return fnmatch(pattern, string, FNM_CASEFOLD) == 0;
	206	}
	207	bool pkgVersionMatch::ExpressionMatches(const std::string& pattern, const char *string)
	208	{
	209	return ExpressionMatches(pattern.c_str(), string);
	210	}
b2e465d6 AL	211	/}}}/
	212	// VersionMatch::FileMatch - Match against an index file /{{{/
	213	// ---------------------------------------------------------------------
	214	/* This matcher checks against the release file and the origin location
	215	to see if the constraints are met. */
	216	bool pkgVersionMatch::FileMatch(pkgCache::PkgFileIterator File)
	217	{
	218	if (Type == Release)
	219	{
0a5e4a03 AL	220	if (MatchAll == true)
0a5e4a03 AL	221	return true;
efc487fb	222
b2e465d6	223	/* cout << RelVerStr << ',' << RelOrigin << ',' << RelArchive << ',' << RelLabel << endl;
af87ab54	224	cout << File.Version() << ',' << File.Origin() << ',' << File.Archive() << ',' << File.Label() << endl;*/
efc487fb	225
b2e465d6 AL	226	if (RelVerStr.empty() == true && RelOrigin.empty() == true &&
b2e465d6 AL	227	RelArchive.empty() == true && RelLabel.empty() == true &&
efc487fb	228	RelRelease.empty() == true && RelCodename.empty() == true &&
5dd4c8b8	229	RelComponent.empty() == true && RelArchitecture.empty() == true)
b2e465d6	230	return false;
efc487fb	231
b2e465d6 AL	232	if (RelVerStr.empty() == false)
b2e465d6 AL	233	if (File->Version == 0 \|\|
ae4a4f91 JAK	234	(MatchVer(File.Version(),RelVerStr,RelVerPrefixMatch) == false &&
ae4a4f91 JAK	235	ExpressionMatches(RelVerStr, File.Version()) == false))
b2e465d6 AL	236	return false;
b2e465d6 AL	237	if (RelOrigin.empty() == false)
ae4a4f91	238	if (File->Origin == 0 \|\| !ExpressionMatches(RelOrigin,File.Origin()))
b2e465d6 AL	239	return false;
b2e465d6 AL	240	if (RelArchive.empty() == false)
efc487fb	241	if (File->Archive == 0 \|\|
ae4a4f91	242	!ExpressionMatches(RelArchive,File.Archive()))
efc487fb DK	243	return false;
	244	if (RelCodename.empty() == false)
	245	if (File->Codename == 0 \|\|
ae4a4f91	246	!ExpressionMatches(RelCodename,File.Codename()))
efc487fb DK	247	return false;
	248	if (RelRelease.empty() == false)
	249	if ((File->Archive == 0 \|\|
ae4a4f91	250	!ExpressionMatches(RelRelease,File.Archive())) &&
efc487fb	251	(File->Codename == 0 \|\|
ae4a4f91	252	!ExpressionMatches(RelRelease,File.Codename())))
efc487fb	253	return false;
b2e465d6 AL	254	if (RelLabel.empty() == false)
b2e465d6 AL	255	if (File->Label == 0 \|\|
ae4a4f91	256	!ExpressionMatches(RelLabel,File.Label()))
b2e465d6 AL	257	return false;
	258	if (RelComponent.empty() == false)
	259	if (File->Component == 0 \|\|
ae4a4f91	260	!ExpressionMatches(RelComponent,File.Component()))
b2e465d6	261	return false;
5dd4c8b8 DK	262	if (RelArchitecture.empty() == false)
5dd4c8b8 DK	263	if (File->Architecture == 0 \|\|
ae4a4f91	264	!ExpressionMatches(RelArchitecture,File.Architecture()))
5dd4c8b8	265	return false;
b2e465d6 AL	266	return true;
b2e465d6 AL	267	}
efc487fb	268
b2e465d6 AL	269	if (Type == Origin)
b2e465d6 AL	270	{
acfe7306	271	if (OrSite.empty() == false) {
ba91b151	272	if (File->Site == 0)
acfe7306 AL	273	return false;
acfe7306 AL	274	} else // so we are talking about file:// or status file
ba91b151	275	if (strcmp(File.Site(),"") == 0 && File->Archive != 0 && strcmp(File.Archive(),"now") == 0) // skip the status file
acfe7306	276	return false;
ae4a4f91	277	return (ExpressionMatches(OrSite, File.Site())); /* both strings match */
b2e465d6	278	}
efc487fb	279
b2e465d6 AL	280	return false;
	281	}
	282	/}}}/