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370 lines
10 KiB
C++
370 lines
10 KiB
C++
/*=========================================================================
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Program: CMake - Cross-Platform Makefile Generator
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Module: $RCSfile$
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Language: C++
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Date: $Date$
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Version: $Revision$
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Copyright (c) 2002 Kitware, Inc., Insight Consortium. All rights reserved.
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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
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the above copyright notices for more information.
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=========================================================================*/
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#include "cmListFileCache.h"
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#include "cmSystemTools.h"
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#include <cmsys/RegularExpression.hxx>
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cmListFileCache* cmListFileCache::Instance = 0;
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cmListFileCache* cmListFileCache::GetInstance()
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{
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if(!cmListFileCache::Instance)
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{
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cmListFileCache::Instance = new cmListFileCache;
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}
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return cmListFileCache::Instance;
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}
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void cmListFileCache::ClearCache()
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{
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delete cmListFileCache::Instance;
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cmListFileCache::Instance = 0;
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}
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cmListFile* cmListFileCache::GetFileCache(const char* path,
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bool requireProjectCommand)
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{
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ListFileMap::iterator sl = m_ListFileCache.find(path);
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if (sl == m_ListFileCache.end())
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{
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// if not already in the map, then parse and store the
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// file
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if(!this->CacheFile(path, requireProjectCommand))
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{
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return 0;
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}
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sl = m_ListFileCache.find(path);
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if (sl == m_ListFileCache.end())
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{
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cmSystemTools::Error("Fatal error, in cmListFileCache CacheFile failed",
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path);
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return 0;
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}
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}
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cmListFile& ret = sl->second;
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if(cmSystemTools::ModifiedTime(path) > ret.m_ModifiedTime )
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{
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if(!this->CacheFile(path, requireProjectCommand))
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{
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return 0;
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}
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else
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{
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sl = m_ListFileCache.find(path);
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return &sl->second;
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}
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}
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return &ret;
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}
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bool cmListFileCache::CacheFile(const char* path, bool requireProjectCommand)
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{
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if(!cmSystemTools::FileExists(path))
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{
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return false;
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}
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std::ifstream fin(path);
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if(!fin)
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{
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cmSystemTools::Error("cmListFileCache: error can not open file ", path);
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return false;
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}
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long line=0;
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cmListFile inFile;
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inFile.m_ModifiedTime = cmSystemTools::ModifiedTime(path);
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bool parseError;
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while ( fin )
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{
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cmListFileFunction inFunction;
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if(cmListFileCache::ParseFunction(fin, inFunction, path, parseError,
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line))
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{
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inFunction.m_FilePath = path;
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inFile.m_Functions.push_back(inFunction);
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}
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if (parseError)
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{
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inFile.m_ModifiedTime = 0;
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}
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}
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if(requireProjectCommand)
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{
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bool hasProject = false;
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// search for a project command
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for(std::vector<cmListFileFunction>::iterator i
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= inFile.m_Functions.begin();
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i != inFile.m_Functions.end(); ++i)
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{
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if(i->m_Name == "PROJECT")
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{
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hasProject = true;
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break;
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}
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}
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// if no project command is found, add one
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if(!hasProject)
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{
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cmListFileFunction project;
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project.m_Name = "PROJECT";
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cmListFileArgument prj("Project", false);
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project.m_Arguments.push_back(prj);
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inFile.m_Functions.insert(inFile.m_Functions.begin(),project);
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}
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}
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m_ListFileCache[path] = inFile;
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return true;
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}
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void cmListFileCache::FlushCache(const char* path)
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{
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ListFileMap::iterator it = m_ListFileCache.find(path);
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if ( it != m_ListFileCache.end() )
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{
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m_ListFileCache.erase(it);
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return;
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}
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}
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//----------------------------------------------------------------------------
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inline bool cmListFileCachePreprocessLine(std::string& line)
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{
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// Keep track of whether characters are inside a quoted argument.
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bool quoted = false;
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// Keep track of whether the line is blank.
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bool blank = true;
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// Loop over every character in the line.
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std::string::iterator c;
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for(c = line.begin(); c != line.end(); ++c)
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{
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if((*c == '\\') && (c < line.end()-1))
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{
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// A backslash escapes any character, so skip the next
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// character.
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++c;
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// We have encountered a non-whitespace character.
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blank = false;
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}
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else if(*c == '"')
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{
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// A double-quote either starts or ends a quoted argument.
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quoted = !quoted;
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// We have encountered a non-whitespace character.
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blank = false;
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}
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else if(*c == '#' && !quoted)
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{
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// A pound character outside a double-quoted argument marks the
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// rest of the line as a comment. Skip it.
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break;
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}
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else if((*c != ' ') && (*c != '\t') && (*c != '\r'))
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{
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// We have encountered a non-whitespace character.
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blank = false;
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}
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}
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// Erase from the comment character to the end of the line. If no
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// comment was present, both iterators are end() iterators and this
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// does nothing.
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line.erase(c, line.end());
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// Return true if there is anything useful on this line.
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return !blank;
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}
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//----------------------------------------------------------------------------
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bool cmListFileCache::ParseFunction(std::ifstream& fin,
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cmListFileFunction& function,
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const char* filename,
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bool& parseError,
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long& line)
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{
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parseError = false;
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std::string& name = function.m_Name;
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std::vector<cmListFileArgument>& arguments = function.m_Arguments;
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name = "";
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arguments = std::vector<cmListFileArgument>();
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std::string inbuffer;
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if(!fin)
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{
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return false;
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}
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if(cmSystemTools::GetLineFromStream(fin, inbuffer) )
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{
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// Count this line in line numbering.
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++line;
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// Preprocess the line to remove comments. Only use it if there
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// is non-whitespace.
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if(!cmListFileCachePreprocessLine(inbuffer))
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{
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return false;
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}
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// Regular expressions to match portions of a command invocation.
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cmsys::RegularExpression oneLiner("^[ \t]*([A-Za-z_0-9]*)[ \t]*\\((.*)\\)[ \t\r]*$");
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cmsys::RegularExpression multiLine("^[ \t]*([A-Za-z_0-9]*)[ \t]*\\((.*)$");
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cmsys::RegularExpression lastLine("^(.*)\\)[ \t\r]*$");
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// look for a oneline fun(arg arg2)
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if(oneLiner.find(inbuffer.c_str()))
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{
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// the arguments are the second match
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std::string args = oneLiner.match(2);
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name = oneLiner.match(1);
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// break up the arguments
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cmListFileCache::GetArguments(args, arguments);
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function.m_Line = line;
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return true;
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}
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// look for a start of a multiline with no trailing ")" fun(arg arg2
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else if(multiLine.find(inbuffer.c_str()))
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{
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name = multiLine.match(1);
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std::string args = multiLine.match(2);
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cmListFileCache::GetArguments(args, arguments);
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function.m_Line = line;
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// Read lines until the closing paren is hit
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bool done = false;
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while(!done)
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{
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// read lines until the end paren is found
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if(cmSystemTools::GetLineFromStream(fin, inbuffer) )
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{
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// Count this line in line numbering.
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++line;
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// Preprocess the line to remove comments. Only use it if there
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// is non-whitespace.
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if(!cmListFileCachePreprocessLine(inbuffer))
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{
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continue;
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}
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// Is this the last line?
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if(lastLine.find(inbuffer.c_str()))
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{
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done = true;
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std::string gargs = lastLine.match(1);
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cmListFileCache::GetArguments(gargs, arguments);
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}
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else
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{
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cmListFileCache::GetArguments(inbuffer, arguments);
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}
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}
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else
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{
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parseError = true;
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cmOStringStream error;
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error << "Error in cmake code at\n"
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<< filename << ":" << line << ":\n"
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<< "Parse error. Function missing ending \")\".";
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cmSystemTools::Error(error.str().c_str());
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return false;
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}
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}
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return true;
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}
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else
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{
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parseError = true;
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cmOStringStream error;
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error << "Error in cmake code at\n"
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<< filename << ":" << line << ":\n"
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<< "Parse error.";
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cmSystemTools::Error(error.str().c_str());
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return false;
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}
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}
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return false;
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}
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void cmListFileCache::GetArguments(std::string& line,
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std::vector<cmListFileArgument>& arguments)
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{
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// Match a normal argument (not quoted, no spaces).
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cmsys::RegularExpression normalArgument("[ \t]*(([^ \t\r\\]|[\\].)+)[ \t\r]*");
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// Match a quoted argument (surrounded by double quotes, spaces allowed).
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cmsys::RegularExpression quotedArgument("[ \t]*(\"([^\"\\]|[\\].)*\")[ \t\r]*");
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bool done = false;
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while(!done)
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{
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std::string arg;
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std::string::size_type endpos=0;
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bool quoted = false;
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bool foundQuoted = quotedArgument.find(line.c_str());
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bool foundNormal = normalArgument.find(line.c_str());
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if(foundQuoted && foundNormal)
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{
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// Both matches were found. Take the earlier one.
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// Favor double-quoted version if there is a tie.
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if(normalArgument.start(1) < quotedArgument.start(1))
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{
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arg = normalArgument.match(1);
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endpos = normalArgument.end(1);
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}
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else
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{
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arg = quotedArgument.match(1);
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endpos = quotedArgument.end(1);
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// Strip off the double quotes on the ends.
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arg = arg.substr(1, arg.length()-2);
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quoted = true;
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}
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}
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else if(foundQuoted)
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{
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arg = quotedArgument.match(1);
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endpos = quotedArgument.end(1);
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// Strip off the double quotes on the ends.
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arg = arg.substr(1, arg.length()-2);
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quoted = true;
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}
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else if(foundNormal)
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{
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arg = normalArgument.match(1);
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endpos = normalArgument.end(1);
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}
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else
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{
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done = true;
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}
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if(!done)
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{
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cmListFileArgument a(cmSystemTools::RemoveEscapes(arg.c_str()), quoted);
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arguments.push_back(a);
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line = line.substr(endpos, line.length() - endpos);
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}
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}
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}
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