CMake/Source/cmListFileCache.cxx

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/*=========================================================================
Program: CMake - Cross-Platform Makefile Generator
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Module: $RCSfile$
Language: C++
Date: $Date$
Version: $Revision$
Copyright (c) 2002 Kitware, Inc., Insight Consortium. All rights reserved.
See Copyright.txt or http://www.cmake.org/HTML/Copyright.html for details.
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This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notices for more information.
=========================================================================*/
#include "cmListFileCache.h"
#include "cmSystemTools.h"
#include <cmsys/RegularExpression.hxx>
cmListFileCache* cmListFileCache::Instance = 0;
cmListFileCache* cmListFileCache::GetInstance()
{
if(!cmListFileCache::Instance)
{
cmListFileCache::Instance = new cmListFileCache;
}
return cmListFileCache::Instance;
}
void cmListFileCache::ClearCache()
{
delete cmListFileCache::Instance;
cmListFileCache::Instance = 0;
}
cmListFile* cmListFileCache::GetFileCache(const char* path,
bool requireProjectCommand)
{
ListFileMap::iterator sl = m_ListFileCache.find(path);
if (sl == m_ListFileCache.end())
{
// if not already in the map, then parse and store the
// file
if(!this->CacheFile(path, requireProjectCommand))
{
return 0;
}
sl = m_ListFileCache.find(path);
if (sl == m_ListFileCache.end())
{
cmSystemTools::Error("Fatal error, in cmListFileCache CacheFile failed",
path);
return 0;
}
}
cmListFile& ret = sl->second;
if(cmSystemTools::ModifiedTime(path) > ret.m_ModifiedTime )
{
if(!this->CacheFile(path, requireProjectCommand))
{
return 0;
}
else
{
sl = m_ListFileCache.find(path);
return &sl->second;
}
}
return &ret;
}
bool cmListFileCache::CacheFile(const char* path, bool requireProjectCommand)
{
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if(!cmSystemTools::FileExists(path))
{
return false;
}
std::ifstream fin(path);
if(!fin)
{
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cmSystemTools::Error("cmListFileCache: error can not open file ", path);
return false;
}
long line=0;
cmListFile inFile;
inFile.m_ModifiedTime = cmSystemTools::ModifiedTime(path);
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bool parseError;
while ( fin )
{
cmListFileFunction inFunction;
if(cmListFileCache::ParseFunction(fin, inFunction, path, parseError,
line))
{
inFunction.m_FilePath = path;
inFile.m_Functions.push_back(inFunction);
}
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if (parseError)
{
inFile.m_ModifiedTime = 0;
}
}
if(requireProjectCommand)
{
bool hasProject = false;
// search for a project command
for(std::vector<cmListFileFunction>::iterator i
= inFile.m_Functions.begin();
i != inFile.m_Functions.end(); ++i)
{
if(i->m_Name == "PROJECT")
{
hasProject = true;
break;
}
}
// if no project command is found, add one
if(!hasProject)
{
cmListFileFunction project;
project.m_Name = "PROJECT";
cmListFileArgument prj("Project", false);
project.m_Arguments.push_back(prj);
inFile.m_Functions.insert(inFile.m_Functions.begin(),project);
}
}
m_ListFileCache[path] = inFile;
return true;
}
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void cmListFileCache::FlushCache(const char* path)
{
ListFileMap::iterator it = m_ListFileCache.find(path);
if ( it != m_ListFileCache.end() )
{
m_ListFileCache.erase(it);
return;
}
}
inline void RemoveComments(std::string& line)
{
std::string::size_type pos = line.find("#");
if (pos != std::string::npos )
{
line.erase(pos);
}
}
bool cmListFileCache::ParseFunction(std::ifstream& fin,
cmListFileFunction& function,
const char* filename,
bool& parseError,
long& line)
{
parseError = false;
std::string& name = function.m_Name;
std::vector<cmListFileArgument>& arguments = function.m_Arguments;
name = "";
arguments = std::vector<cmListFileArgument>();
std::string inbuffer;
if(!fin)
{
return false;
}
if(cmSystemTools::GetLineFromStream(fin, inbuffer) )
{
++line;
RemoveComments(inbuffer);
cmsys::RegularExpression blankLine("^[ \t\r]*$");
cmsys::RegularExpression oneLiner("^[ \t]*([A-Za-z_0-9]*)[ \t]*\\((.*)\\)[ \t\r]*$");
cmsys::RegularExpression multiLine("^[ \t]*([A-Za-z_0-9]*)[ \t]*\\((.*)$");
cmsys::RegularExpression lastLine("^(.*)\\)[ \t\r]*$");
// check for blank line or comment
if(blankLine.find(inbuffer.c_str()) )
{
return false;
}
// look for a oneline fun(arg arg2)
else if(oneLiner.find(inbuffer.c_str()))
{
// the arguments are the second match
std::string args = oneLiner.match(2);
name = oneLiner.match(1);
// break up the arguments
cmListFileCache::GetArguments(args, arguments);
function.m_Line = line;
return true;
}
// look for a start of a multiline with no trailing ")" fun(arg arg2
else if(multiLine.find(inbuffer.c_str()))
{
name = multiLine.match(1);
std::string args = multiLine.match(2);
cmListFileCache::GetArguments(args, arguments);
function.m_Line = line;
// Read lines until the closing paren is hit
bool done = false;
while(!done)
{
// read lines until the end paren is found
if(cmSystemTools::GetLineFromStream(fin, inbuffer) )
{
++line;
RemoveComments(inbuffer);
// Check for comment lines and ignore them.
if(blankLine.find(inbuffer.c_str()))
{ continue; }
// Is this the last line?
if(lastLine.find(inbuffer.c_str()))
{
done = true;
std::string gargs = lastLine.match(1);
cmListFileCache::GetArguments(gargs, arguments);
}
else
{
cmListFileCache::GetArguments(inbuffer, arguments);
}
}
else
{
parseError = true;
cmOStringStream error;
error << "Error in cmake code at\n"
<< filename << ":" << line << ":\n"
<< "Parse error. Function missing ending \")\".";
cmSystemTools::Error(error.str().c_str());
return false;
}
}
return true;
}
else
{
parseError = true;
cmOStringStream error;
error << "Error in cmake code at\n"
<< filename << ":" << line << ":\n"
<< "Parse error.";
cmSystemTools::Error(error.str().c_str());
return false;
}
}
return false;
}
void cmListFileCache::GetArguments(std::string& line,
std::vector<cmListFileArgument>& arguments)
{
// Match a normal argument (not quoted, no spaces).
cmsys::RegularExpression normalArgument("[ \t]*(([^ \t\r\\]|[\\].)+)[ \t\r]*");
// Match a quoted argument (surrounded by double quotes, spaces allowed).
cmsys::RegularExpression quotedArgument("[ \t]*(\"([^\"\\]|[\\].)*\")[ \t\r]*");
bool done = false;
while(!done)
{
std::string arg;
std::string::size_type endpos=0;
bool quoted = false;
bool foundQuoted = quotedArgument.find(line.c_str());
bool foundNormal = normalArgument.find(line.c_str());
if(foundQuoted && foundNormal)
{
// Both matches were found. Take the earlier one.
// Favor double-quoted version if there is a tie.
if(normalArgument.start(1) < quotedArgument.start(1))
{
arg = normalArgument.match(1);
endpos = normalArgument.end(1);
}
else
{
arg = quotedArgument.match(1);
endpos = quotedArgument.end(1);
// Strip off the double quotes on the ends.
arg = arg.substr(1, arg.length()-2);
quoted = true;
}
}
else if(foundQuoted)
{
arg = quotedArgument.match(1);
endpos = quotedArgument.end(1);
// Strip off the double quotes on the ends.
arg = arg.substr(1, arg.length()-2);
quoted = true;
}
else if(foundNormal)
{
arg = normalArgument.match(1);
endpos = normalArgument.end(1);
}
else
{
done = true;
}
if(!done)
{
cmListFileArgument a(cmSystemTools::RemoveEscapes(arg.c_str()), quoted);
arguments.push_back(a);
line = line.substr(endpos, line.length() - endpos);
}
}
}