[apt.git] / ftparchive / override.cc

// -*- mode: cpp; mode: fold -*-
// Description								/*{{{*/
// $Id: override.cc,v 1.4 2003/02/10 07:34:41 doogie Exp $
/* ######################################################################

   Override
   
   Store the override file.
   
   ##################################################################### */
									/*}}}*/
// Include Files							/*{{{*/
#include <config.h>

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

#include <stdio.h>

#include "override.h"

#include <apti18n.h>
									/*}}}*/

// Override::ReadOverride - Read the override file			/*{{{*/
// ---------------------------------------------------------------------
/* This parses the override file and reads it into the map */
bool Override::ReadOverride(string const &File,bool const &Source)
{
   if (File.empty() == true)
      return true;
   
   FILE *F = fopen(File.c_str(),"r");
   if (F == 0)
      return _error->Errno("fopen",_("Unable to open %s"),File.c_str());
   
   char Line[500];
   unsigned long long Counter = 0;
   while (fgets(Line,sizeof(Line),F) != 0)
   {
      Counter++;
      Item Itm;

      // Silence 
      for (char *I = Line; *I != 0; I++)
	 if (*I == '#')
	    *I = 0;

      // Strip space leading up to the package name, skip blank lines
      char *Pkg = Line;
      for (; isspace(*Pkg) && *Pkg != 0;Pkg++);
      if (Pkg == 0)
	 continue;

      // Find the package and zero..
      char *Start = Pkg;
      char *End = Pkg;
      for (; isspace(*End) == 0 && *End != 0; End++);
      if (*End == 0)
      {
	 _error->Warning(_("Malformed override %s line %llu #1"),File.c_str(),
			 Counter);
	 continue;
      }      
      *End = 0;

      // Find the priority
      if (Source == false)
      {
	 for (End++; isspace(*End) != 0 && *End != 0; End++);
	 Start = End;
	 for (; isspace(*End) == 0 && *End != 0; End++);
	 if (*End == 0)
	 {
	    _error->Warning(_("Malformed override %s line %llu #2"),File.c_str(),
			    Counter);
	    continue;
	 }
	 *End = 0;
	 Itm.Priority = Start;
      }
      
      // Find the Section
      for (End++; isspace(*End) != 0 && *End != 0; End++);
      Start = End;
      for (; isspace(*End) == 0 && *End != 0; End++);
      if (*End == 0)
      {
	 _error->Warning(_("Malformed override %s line %llu #3"),File.c_str(),
			 Counter);
	 continue;
      }      
      *End = 0;
      Itm.FieldOverride["Section"] = Start;

      // Source override files only have the two columns
      if (Source == true)
      {
	 Mapping[Pkg] = Itm;
	 continue;
      }
      
      // Find the =>
      for (End++; isspace(*End) != 0 && *End != 0; End++);
      if (*End != 0)
      {
	 Start = End;
	 for (; *End != 0 && (End[0] != '=' || End[1] != '>'); End++);
	 if (*End == 0 || strlen(End) < 4)
	 {
	    Itm.OldMaint = "*";
	    Itm.NewMaint = _strstrip(Start);
	 }
	 else
	 {
	    *End = 0;
	    Itm.OldMaint = _strstrip(Start);
	    
	    End += 3;
	    Itm.NewMaint = _strstrip(End);
	 }	 
      }

      Mapping[Pkg] = Itm;
   }

   if (ferror(F))
      _error->Errno("fgets",_("Failed to read the override file %s"),File.c_str());
   fclose(F);
   return true;
}
									/*}}}*/
// Override::ReadExtraOverride - Read the extra override file		/*{{{*/
// ---------------------------------------------------------------------
/* This parses the extra override file and reads it into the map */
bool Override::ReadExtraOverride(string const &File,bool const &Source)
{
   if (File.empty() == true)
      return true;
   
   FILE *F = fopen(File.c_str(),"r");
   if (F == 0)
      return _error->Errno("fopen",_("Unable to open %s"),File.c_str());
  
   char Line[500];
   unsigned long long Counter = 0;
   while (fgets(Line,sizeof(Line),F) != 0)
   {
      Counter++;

      // Silence 
      for (char *I = Line; *I != 0; I++)
	 if (*I == '#')
	    *I = 0;

      // Strip space leading up to the package name, skip blank lines
      char *Pkg = Line;
      for (; isspace(*Pkg) && *Pkg != 0;Pkg++);
      if (Pkg == 0)
	 continue;

      // Find the package and zero..
      char *End = Pkg;
      for (; isspace(*End) == 0 && *End != 0; End++);
      if (*End == 0)
      {
	 _error->Warning(_("Malformed override %s line %llu #1"),File.c_str(),
			 Counter);
	 continue;
      }      
      *End = 0;

      // Find the field
      for (End++; isspace(*End) != 0 && *End != 0; End++);
      char *Field = End;
      for (; isspace(*End) == 0 && *End != 0; End++);
      if (*End == 0)
      {
	 _error->Warning(_("Malformed override %s line %llu #2"),File.c_str(),
			 Counter);
	 continue;
      }
      *End = 0;
      
      // Find the field value 
      for (End++; isspace(*End) != 0 && *End != 0; End++);
      char *Value = End;
      for (; *End != 0; End++);
      for (; isspace(*(End-1)) && End > Value; End--);
      if (End == Value)
      {
	 _error->Warning(_("Malformed override %s line %llu #3"),File.c_str(),
			 Counter);
	 continue;
      }      
      *End = 0;

      Mapping[Pkg].FieldOverride[Field] = Value;
   }

   if (ferror(F))
      _error->Errno("fgets",_("Failed to read the override file %s"),File.c_str());
   fclose(F);
   return true;
}
									/*}}}*/

// Override::GetItem - Get a architecture specific item 	/*{{{*/
// ---------------------------------------------------------------------
/* Returns a override item for the given package and the given architecture.
 * Treats "all" special
 */
Override::Item* Override::GetItem(string const &Package, string const &Architecture)
{
   map<string,Item>::const_iterator I = Mapping.find(Package);
   map<string,Item>::iterator J = Mapping.find(Package + "/" + Architecture);

   if (I == Mapping.end() && J == Mapping.end())
   {
      return 0;
   }

   Item *result = new Item;
   if (I == Mapping.end()) *result = J->second;
   else
   {
      *result = I->second;
      if (J != Mapping.end())
      {
	 Item *R = &J->second;
	 if (R->Priority != "") result->Priority = R->Priority;
	 if (R->OldMaint != "") result->OldMaint = R->OldMaint;
	 if (R->NewMaint != "") result->NewMaint = R->NewMaint;
	 for (map<string,string>::const_iterator foI = R->FieldOverride.begin();
	      foI != R->FieldOverride.end(); ++foI)
         {
	    result->FieldOverride[foI->first] = foI->second;
	 }
      } 
   } 
   return result;
};


// Override::Item::SwapMaint - Swap the maintainer field if necessary	/*{{{*/
// ---------------------------------------------------------------------
/* Returns the new maintainer string after evaluating the rewriting rule. If
   there is a rule but it does not match then the empty string is returned,
   also if there was no rewrite rule the empty string is returned. Failed
   indicates if there was some kind of problem while rewriting. */
string Override::Item::SwapMaint(string const &Orig,bool &Failed)
{
   Failed = false;
   
   // Degenerate case..
   if (NewMaint.empty() == true)
	 return OldMaint;
   
   if (OldMaint == "*")
      return NewMaint;
   
   /* James: ancient, eliminate it, however it is still being used in the main
      override file. Thus it persists.*/
#if 1
   // Break OldMaint up into little bits on double slash boundaries.
   string::const_iterator End = OldMaint.begin();
   while (1)
   {
      string::const_iterator Start = End;      
      for (; End < OldMaint.end() &&
	   (End + 3 >= OldMaint.end() || End[0] != ' ' || 
	    End[1] != '/' || End[2] != '/'); ++End);
      if (stringcasecmp(Start,End,Orig.begin(),Orig.end()) == 0)
	 return NewMaint;
      
      if (End >= OldMaint.end())
	 break;

      // Skip the divider and white space
      for (; End < OldMaint.end() && (*End == '/' || *End == ' '); ++End);
   }
#else
   if (stringcasecmp(OldMaint.begin(),OldMaint.end(),Orig.begin(),Orig.end()) == 0)
      return NewMaint;   
#endif
   
   Failed = true;
   return string();
}
									/*}}}*/
Commit	Line	Data
b2e465d6 AL	1	// -- mode: cpp; mode: fold --
b2e465d6 AL	2	// Description /{{{/
dc738e7a	3	// $Id: override.cc,v 1.4 2003/02/10 07:34:41 doogie Exp $
b2e465d6 AL	4	/* ######################################################################
	5
	6	Override
	7
	8	Store the override file.
	9
	10	##################################################################### */
	11	/}}}/
	12	// Include Files /{{{/
ea542140 DK	13	#include <config.h>
ea542140 DK	14
b2e465d6 AL	15	#include <apt-pkg/strutl.h>
	16	#include <apt-pkg/error.h>
	17
	18	#include <stdio.h>
ea542140	19
b2e465d6	20	#include "override.h"
a00a9b44 DK	21
a00a9b44 DK	22	#include <apti18n.h>
b2e465d6 AL	23	/}}}/
	24
	25	// Override::ReadOverride - Read the override file /{{{/
	26	// ---------------------------------------------------------------------
	27	/* This parses the override file and reads it into the map */
9209ec47	28	bool Override::ReadOverride(string const &File,bool const &Source)
b2e465d6 AL	29	{
	30	if (File.empty() == true)
	31	return true;
	32
	33	FILE *F = fopen(File.c_str(),"r");
	34	if (F == 0)
dc738e7a	35	return _error->Errno("fopen",_("Unable to open %s"),File.c_str());
b2e465d6 AL	36
b2e465d6 AL	37	char Line[500];
650faab0	38	unsigned long long Counter = 0;
b2e465d6 AL	39	while (fgets(Line,sizeof(Line),F) != 0)
	40	{
	41	Counter++;
	42	Item Itm;
	43
	44	// Silence
	45	for (char I = Line; I != 0; I++)
	46	if (*I == '#')
	47	*I = 0;
	48
	49	// Strip space leading up to the package name, skip blank lines
	50	char *Pkg = Line;
	51	for (; isspace(Pkg) && Pkg != 0;Pkg++);
	52	if (Pkg == 0)
	53	continue;
	54
	55	// Find the package and zero..
	56	char *Start = Pkg;
	57	char *End = Pkg;
	58	for (; isspace(End) == 0 && End != 0; End++);
	59	if (*End == 0)
	60	{
650faab0	61	_error->Warning(_("Malformed override %s line %llu #1"),File.c_str(),
b2e465d6 AL	62	Counter);
	63	continue;
	64	}
	65	*End = 0;
	66
	67	// Find the priority
	68	if (Source == false)
	69	{
	70	for (End++; isspace(End) != 0 && End != 0; End++);
	71	Start = End;
	72	for (; isspace(End) == 0 && End != 0; End++);
	73	if (*End == 0)
	74	{
650faab0	75	_error->Warning(_("Malformed override %s line %llu #2"),File.c_str(),
b2e465d6 AL	76	Counter);
	77	continue;
	78	}
	79	*End = 0;
	80	Itm.Priority = Start;
	81	}
	82
	83	// Find the Section
	84	for (End++; isspace(End) != 0 && End != 0; End++);
	85	Start = End;
	86	for (; isspace(End) == 0 && End != 0; End++);
	87	if (*End == 0)
	88	{
650faab0	89	_error->Warning(_("Malformed override %s line %llu #3"),File.c_str(),
b2e465d6 AL	90	Counter);
	91	continue;
	92	}
	93	*End = 0;
64177f17	94	Itm.FieldOverride["Section"] = Start;
b2e465d6 AL	95
	96	// Source override files only have the two columns
	97	if (Source == true)
	98	{
	99	Mapping[Pkg] = Itm;
	100	continue;
	101	}
	102
	103	// Find the =>
	104	for (End++; isspace(End) != 0 && End != 0; End++);
	105	if (*End != 0)
	106	{
	107	Start = End;
	108	for (; *End != 0 && (End[0] != '=' \|\| End[1] != '>'); End++);
	109	if (*End == 0 \|\| strlen(End) < 4)
	110	{
	111	Itm.OldMaint = "*";
	112	Itm.NewMaint = _strstrip(Start);
	113	}
	114	else
	115	{
	116	*End = 0;
	117	Itm.OldMaint = _strstrip(Start);
	118
	119	End += 3;
	120	Itm.NewMaint = _strstrip(End);
	121	}
	122	}
	123
	124	Mapping[Pkg] = Itm;
	125	}
	126
64177f17	127	if (ferror(F))
dc738e7a	128	_error->Errno("fgets",_("Failed to read the override file %s"),File.c_str());
64177f17 AL	129	fclose(F);
	130	return true;
	131	}
	132	/}}}/
	133	// Override::ReadExtraOverride - Read the extra override file /{{{/
	134	// ---------------------------------------------------------------------
	135	/* This parses the extra override file and reads it into the map */
9209ec47	136	bool Override::ReadExtraOverride(string const &File,bool const &Source)
64177f17 AL	137	{
	138	if (File.empty() == true)
	139	return true;
	140
	141	FILE *F = fopen(File.c_str(),"r");
	142	if (F == 0)
dc738e7a	143	return _error->Errno("fopen",_("Unable to open %s"),File.c_str());
64177f17 AL	144
64177f17 AL	145	char Line[500];
650faab0	146	unsigned long long Counter = 0;
64177f17 AL	147	while (fgets(Line,sizeof(Line),F) != 0)
	148	{
	149	Counter++;
	150
	151	// Silence
	152	for (char I = Line; I != 0; I++)
	153	if (*I == '#')
	154	*I = 0;
	155
	156	// Strip space leading up to the package name, skip blank lines
	157	char *Pkg = Line;
	158	for (; isspace(Pkg) && Pkg != 0;Pkg++);
	159	if (Pkg == 0)
	160	continue;
	161
	162	// Find the package and zero..
	163	char *End = Pkg;
	164	for (; isspace(End) == 0 && End != 0; End++);
	165	if (*End == 0)
	166	{
650faab0	167	_error->Warning(_("Malformed override %s line %llu #1"),File.c_str(),
64177f17 AL	168	Counter);
	169	continue;
	170	}
	171	*End = 0;
	172
	173	// Find the field
	174	for (End++; isspace(End) != 0 && End != 0; End++);
	175	char *Field = End;
	176	for (; isspace(End) == 0 && End != 0; End++);
	177	if (*End == 0)
	178	{
650faab0	179	_error->Warning(_("Malformed override %s line %llu #2"),File.c_str(),
64177f17 AL	180	Counter);
	181	continue;
	182	}
	183	*End = 0;
	184
	185	// Find the field value
	186	for (End++; isspace(End) != 0 && End != 0; End++);
	187	char *Value = End;
	188	for (; *End != 0; End++);
	189	for (; isspace(*(End-1)) && End > Value; End--);
	190	if (End == Value)
	191	{
650faab0	192	_error->Warning(_("Malformed override %s line %llu #3"),File.c_str(),
64177f17 AL	193	Counter);
	194	continue;
	195	}
	196	*End = 0;
	197
	198	Mapping[Pkg].FieldOverride[Field] = Value;
	199	}
	200
b2e465d6	201	if (ferror(F))
dc738e7a	202	_error->Errno("fgets",_("Failed to read the override file %s"),File.c_str());
b2e465d6 AL	203	fclose(F);
	204	return true;
	205	}
	206	/}}}/
0b41e0e7 MV	207
	208	// Override::GetItem - Get a architecture specific item /{{{/
	209	// ---------------------------------------------------------------------
	210	/* Returns a override item for the given package and the given architecture.
	211	* Treats "all" special
	212	*/
9209ec47	213	Override::Item* Override::GetItem(string const &Package, string const &Architecture)
0b41e0e7	214	{
9209ec47	215	map<string,Item>::const_iterator I = Mapping.find(Package);
0b41e0e7 MV	216	map<string,Item>::iterator J = Mapping.find(Package + "/" + Architecture);
	217
	218	if (I == Mapping.end() && J == Mapping.end())
	219	{
	220	return 0;
	221	}
	222
	223	Item *result = new Item;
	224	if (I == Mapping.end()) *result = J->second;
	225	else
	226	{
	227	*result = I->second;
	228	if (J != Mapping.end())
	229	{
	230	Item *R = &J->second;
	231	if (R->Priority != "") result->Priority = R->Priority;
	232	if (R->OldMaint != "") result->OldMaint = R->OldMaint;
	233	if (R->NewMaint != "") result->NewMaint = R->NewMaint;
9209ec47	234	for (map<string,string>::const_iterator foI = R->FieldOverride.begin();
f7f0d6c7	235	foI != R->FieldOverride.end(); ++foI)
0b41e0e7 MV	236	{
	237	result->FieldOverride[foI->first] = foI->second;
	238	}
	239	}
	240	}
	241	return result;
	242	};
	243
	244
b2e465d6 AL	245	// Override::Item::SwapMaint - Swap the maintainer field if necessary /{{{/
	246	// ---------------------------------------------------------------------
	247	/* Returns the new maintainer string after evaluating the rewriting rule. If
	248	there is a rule but it does not match then the empty string is returned,
	249	also if there was no rewrite rule the empty string is returned. Failed
	250	indicates if there was some kind of problem while rewriting. */
9209ec47	251	string Override::Item::SwapMaint(string const &Orig,bool &Failed)
b2e465d6 AL	252	{
	253	Failed = false;
	254
	255	// Degenerate case..
	256	if (NewMaint.empty() == true)
	257	return OldMaint;
	258
	259	if (OldMaint == "*")
	260	return NewMaint;
	261
	262	/* James: ancient, eliminate it, however it is still being used in the main
	263	override file. Thus it persists.*/
	264	#if 1
	265	// Break OldMaint up into little bits on double slash boundaries.
9209ec47	266	string::const_iterator End = OldMaint.begin();
b2e465d6 AL	267	while (1)
b2e465d6 AL	268	{
9209ec47	269	string::const_iterator Start = End;
b2e465d6 AL	270	for (; End < OldMaint.end() &&
b2e465d6 AL	271	(End + 3 >= OldMaint.end() \|\| End[0] != ' ' \|\|
f7f0d6c7	272	End[1] != '/' \|\| End[2] != '/'); ++End);
b2e465d6 AL	273	if (stringcasecmp(Start,End,Orig.begin(),Orig.end()) == 0)
	274	return NewMaint;
	275
	276	if (End >= OldMaint.end())
	277	break;
	278
	279	// Skip the divider and white space
f7f0d6c7	280	for (; End < OldMaint.end() && (End == '/' \|\| End == ' '); ++End);
b2e465d6 AL	281	}
	282	#else
	283	if (stringcasecmp(OldMaint.begin(),OldMaint.end(),Orig.begin(),Orig.end()) == 0)
	284	return NewMaint;
	285	#endif
	286
	287	Failed = true;
	288	return string();
	289	}
	290	/}}}/