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/*============================================================================
CMake - Cross Platform Makefile Generator
Copyright 2000-2009 Kitware, Inc., Insight Software Consortium
Distributed under the OSI-approved BSD License (the "License");
see accompanying file Copyright.txt for details.
This software is distributed WITHOUT ANY WARRANTY; without even the
implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the License for more information.
============================================================================*/
#include "cmLoadCacheCommand.h"
#include <cmsys/RegularExpression.hxx>
#include <cmsys/FStream.hxx>
// cmLoadCacheCommand
bool cmLoadCacheCommand
::InitialPass(std::vector<std::string> const& args, cmExecutionStatus &)
{
if (args.size()< 1)
{
this->SetError("called with wrong number of arguments.");
}
if(args.size() >= 2 && args[1] == "READ_WITH_PREFIX")
{
return this->ReadWithPrefix(args);
}
// Cache entries to be excluded from the import list.
// If this set is empty, all cache entries are brought in
// and they can not be overridden.
bool excludeFiles=false;
unsigned int i;
std::set<std::string> excludes;
for(i=0; i<args.size(); i++)
{
if (excludeFiles)
{
excludes.insert(args[i]);
}
if (args[i] == "EXCLUDE")
{
excludeFiles=true;
}
if (excludeFiles && (args[i] == "INCLUDE_INTERNALS"))
{
break;
}
}
// Internal cache entries to be imported.
// If this set is empty, no internal cache entries are
// brought in.
bool includeFiles=false;
std::set<std::string> includes;
for(i=0; i<args.size(); i++)
{
if (includeFiles)
{
includes.insert(args[i]);
}
if (args[i] == "INCLUDE_INTERNALS")
{
includeFiles=true;
}
if (includeFiles && (args[i] == "EXCLUDE"))
{
break;
}
}
// Loop over each build directory listed in the arguments. Each
// directory has a cache file.
for(i=0; i<args.size(); i++)
{
if ((args[i] == "EXCLUDE") || (args[i] == "INCLUDE_INTERNALS"))
{
break;
}
this->Makefile->GetCacheManager()->LoadCache(args[i], false,
excludes, includes);
}
return true;
}
//----------------------------------------------------------------------------
bool cmLoadCacheCommand::ReadWithPrefix(std::vector<std::string> const& args)
{
// Make sure we have a prefix.
if(args.size() < 3)
{
this->SetError("READ_WITH_PREFIX form must specify a prefix.");
return false;
}
// Make sure the cache file exists.
std::string cacheFile = args[0]+"/CMakeCache.txt";
if(!cmSystemTools::FileExists(cacheFile.c_str()))
{
std::string e = "Cannot load cache file from " + cacheFile;
this->SetError(e);
return false;
}
// Prepare the table of variables to read.
this->Prefix = args[2];
this->VariablesToRead.insert(args.begin() + 3, args.end());
// Read the cache file.
cmsys::ifstream fin(cacheFile.c_str());
// This is a big hack read loop to overcome a buggy ifstream
// implementation on HP-UX. This should work on all platforms even
// for small buffer sizes.
const int bufferSize = 4096;
char buffer[bufferSize];
std::string line;
while(fin)
{
// Read a block of the file.
fin.read(buffer, bufferSize);
if(fin.gcount())
{
// Parse for newlines directly.
const char* i = buffer;
const char* end = buffer+fin.gcount();
while(i != end)
{
const char* begin = i;
while(i != end && *i != '\n') { ++i; }
if(i == begin || *(i-1) != '\r')
{
// Include this portion of the line.
line += std::string(begin, i-begin);
}
else
{
// Include this portion of the line.
// Don't include the \r in a \r\n pair.
line += std::string(begin, i-1-begin);
}
if(i != end)
{
// Completed a line.
this->CheckLine(line.c_str());
line = "";
// Skip the newline character.
++i;
}
}
}
}
if(!line.empty())
{
// Partial last line.
this->CheckLine(line.c_str());
}
return true;
}
//----------------------------------------------------------------------------
void cmLoadCacheCommand::CheckLine(const char* line)
{
// Check one line of the cache file.
std::string var;
std::string value;
cmCacheManager::CacheEntryType type = cmCacheManager::UNINITIALIZED;
if(cmCacheManager::ParseEntry(line, var, value, type))
{
// Found a real entry. See if this one was requested.
if(this->VariablesToRead.find(var) != this->VariablesToRead.end())
{
// This was requested. Set this variable locally with the given
// prefix.
var = this->Prefix + var;
if(!value.empty())
{
this->Makefile->AddDefinition(var, value.c_str());
}
else
{
this->Makefile->RemoveDefinition(var);
}
}
}
}
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