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|
// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
// $Id: override.cc,v 1.2 2001/02/20 07:03:18 jgg Exp $
/* ######################################################################
Override
Store the override file.
##################################################################### */
/*}}}*/
// Include Files /*{{{*/
#ifdef __GNUG__
#pragma implementation "override.h"
#endif
#include "override.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 File,bool 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.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::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 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::iterator End = OldMaint.begin();
while (1)
{
string::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();
}
/*}}}*/
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