[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 "override.h"
    
#include <apti18n.h>
#include <apt-pkg/strutl.h>
#include <apt-pkg/error.h>

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