CMake/Source/cmMakeDepend.cxx

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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile$
Language: C++
Date: $Date$
Version: $Revision$
Copyright (c) 2000 National Library of Medicine
All rights reserved.
See COPYRIGHT.txt for copyright details.
=========================================================================*/
#include "cmMakeDepend.h"
#include "cmStandardIncludes.h"
#include "cmSystemTools.h"
cmMakeDepend::cmMakeDepend()
{
m_Verbose = false;
m_IncludeFileRegularExpression.compile("");
}
cmMakeDepend::~cmMakeDepend()
{
for(DependArray::iterator i = m_DependInformation.begin();
i != m_DependInformation.end(); ++i)
{
delete *i;
}
m_DependInformation.clear();
}
// Set the makefile that depends will be made from.
// The pointer is kept so the cmSourceFile array can
// be updated with the depend information in the cmMakefile.
void cmMakeDepend::SetMakefile(cmMakefile* makefile)
{
m_Makefile = makefile;
// Now extract the include file regular expression from the makefile.
m_IncludeFileRegularExpression.compile(
m_Makefile->m_IncludeFileRegularExpression.c_str());
// Now extract any include paths from the makefile flags
std::vector<std::string>& includes = m_Makefile->GetIncludeDirectories();
std::vector<std::string>::iterator j;
for(j = includes.begin(); j != includes.end(); ++j)
{
this->AddSearchPath(j->c_str());
}
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// Now create cmDependInformation objects for files in the directory
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cmTargets &tgts = m_Makefile->GetTargets();
for(cmTargets::iterator l = tgts.begin();
l != tgts.end(); l++)
{
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l->second.GenerateSourceFilesFromSourceLists(*m_Makefile);
std::vector<cmSourceFile> &classes = l->second.GetSourceFiles();
for(std::vector<cmSourceFile>::iterator i = classes.begin();
i != classes.end(); ++i)
{
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if(!i->GetIsAHeaderFileOnly())
{
cmDependInformation* info = new cmDependInformation;
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info->m_FullPath = this->FullPath(i->GetFullPath().c_str());
this->AddFileToSearchPath(info->m_FullPath.c_str());
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info->m_IncludeName = i->GetFullPath();
info->m_ClassFileIndex = &*i;
m_DependInformation.push_back(info);
}
}
}
}
// Compute the depends.
void cmMakeDepend::DoDepends()
{
// The size of the m_DependInformation will change as
// Depend is called so do not use an iterater but rather
// depend on the size of the array.
unsigned int j = 0;
while(j != m_DependInformation.size())
{
cmDependInformation* info = m_DependInformation[j];
// compute the depend information for the info object
// this may add more objects to the m_DependInformation
// array
this->Depend(info);
++j;
}
// Now update the depend information for each cmSourceFile
// in the cmMakefile m_Makefile
for(DependArray::iterator i = m_DependInformation.begin();
i != m_DependInformation.end(); ++i)
{
cmDependInformation* info = *i;
// find the class
if(info->m_ClassFileIndex != 0)
{
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cmSourceFile& cfile = *(info->m_ClassFileIndex);
for( cmDependInformation::IndexSet::const_iterator indx = info->m_IndexSet.begin();
indx != info->m_IndexSet.end(); ++indx)
{
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cfile.GetDepends().push_back(m_DependInformation[*indx]->m_FullPath);
}
}
}
}
void cmMakeDepend::Depend(cmDependInformation* info)
{
const char* path = info->m_FullPath.c_str();
if(!path)
{
cmSystemTools::Error("no full path for object", 0);
return;
}
// If the file exists, use it to find dependency information.
if(cmSystemTools::FileExists(path))
{
// The cmSourceFile may have had hints for dependencies. Delete any that
// exist since we can find the dependencies for real.
if(info->m_ClassFileIndex != 0)
{
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cmSourceFile& cFile = *(info->m_ClassFileIndex);
cFile.GetDepends().erase(cFile.GetDepends().begin(),
cFile.GetDepends().end());
}
// Use the real file to find its dependencies.
this->DependWalk(info, path);
info->m_DependDone = true;
return;
}
// The file doesn't exist. See if the cmSourceFile for it has any files
// specified as dependency hints.
if(info->m_ClassFileIndex != 0)
{
// Get the cmSourceFile corresponding to this.
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cmSourceFile& cFile = *(info->m_ClassFileIndex);
// See if there are any hints for finding dependencies for the missing
// file.
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if(!cFile.GetDepends().empty())
{
// Initial dependencies have been given. Use them to begin the
// recursion.
for(std::vector<std::string>::iterator file =
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cFile.GetDepends().begin(); file != cFile.GetDepends().end();
++file)
{
this->AddDependency(info, file->c_str());
}
// Erase the dependency hints from the cmSourceFile. They will be
// put in again as real dependencies later.
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cFile.GetDepends().erase(cFile.GetDepends().begin(),
cFile.GetDepends().end());
// Found dependency information. We are done.
return;
}
}
// Couldn't find any dependency information.
cmSystemTools::Error("error cannot find dependencies for ", path);
}
// This function actually reads the file specified and scans it for
// #include directives
void cmMakeDepend::DependWalk(cmDependInformation* info, const char* file)
{
std::ifstream fin(file);
if(!fin)
{
cmSystemTools::Error("error can not open ", file);
return;
}
char line[255];
while(!fin.eof() && !fin.fail())
{
fin.getline(line, 255);
if(!strncmp(line, "#include", 8))
{
// if it is an include line then create a string class
std::string currentline = line;
size_t qstart = currentline.find('\"', 8);
size_t qend;
// if a quote is not found look for a <
if(qstart == std::string::npos)
{
qstart = currentline.find('<', 8);
// if a < is not found then move on
if(qstart == std::string::npos)
{
cmSystemTools::Error("unknown include directive ",
currentline.c_str() );
continue;
}
else
{
qend = currentline.find('>', qstart+1);
}
}
else
{
qend = currentline.find('\"', qstart+1);
}
// extract the file being included
std::string includeFile = currentline.substr(qstart+1, qend - qstart-1);
// see if the include matches the regular expression
if(!m_IncludeFileRegularExpression.find(includeFile))
{
if(m_Verbose)
{
std::string message = "Skipping ";
message += includeFile;
message += " for file ";
message += file;
cmSystemTools::Error(message.c_str(), 0);
}
continue;
}
// Add this file and all its dependencies.
this->AddDependency(info, includeFile.c_str());
}
}
}
void cmMakeDepend::AddDependency(cmDependInformation* info, const char* file)
{
// find the index of the include file in the
// m_DependInformation array, if it is not
// there then FindInformation will create it
int index = this->FindInformation(file);
// add the index to the depends of the current
// depend info object
info->m_IndexSet.insert(index);
// Get the depend information object for the include file
cmDependInformation* dependInfo = m_DependInformation[index];
// if the depends are not known for an include file, then compute them
// recursively
if(!dependInfo->m_DependDone)
{
// stop the recursion here
dependInfo->m_DependDone = true;
this->Depend(dependInfo);
}
// add the depends of the included file to the includer
info->MergeInfo(dependInfo);
}
// Find the cmDependInformation array index of the
// given include file. Create a new cmDependInformation
// object if one is not found
int cmMakeDepend::FindInformation(const char* fname)
{
unsigned int i = 0;
while(i < m_DependInformation.size())
{
if(m_DependInformation[i]->m_IncludeName == fname)
{
return i;
}
++i;
}
cmDependInformation* newinfo = new cmDependInformation;
newinfo->m_FullPath = this->FullPath(fname);
// Add the directory where this file was found to the search path
// may have been foo/bar.h, but bar may include files from the foo
// directory without the foo prefix
this->AddFileToSearchPath(newinfo->m_FullPath.c_str());
newinfo->m_IncludeName = fname;
m_DependInformation.push_back(newinfo);
return m_DependInformation.size()-1;
}
// add the depend information from info to the m_IndexSet varible of this class.
void cmDependInformation::MergeInfo(cmDependInformation* info)
{
if(this != info)
{
m_IndexSet.insert(info->m_IndexSet.begin(), info->m_IndexSet.end());
}
}
// find the full path to fname by searching the m_IncludeDirectories array
std::string cmMakeDepend::FullPath(const char* fname)
{
if(cmSystemTools::FileExists(fname))
{
return std::string(fname);
}
for(std::vector<std::string>::iterator i = m_IncludeDirectories.begin();
i != m_IncludeDirectories.end(); ++i)
{
std::string path = *i;
path = path + "/";
path = path + fname;
if(cmSystemTools::FileExists(path.c_str()))
{
return path;
}
}
return std::string(fname);
}
// Add a directory to the search path
void cmMakeDepend::AddSearchPath(const char* path)
{
m_IncludeDirectories.push_back(path);
}
// Add a directory to the search path
void cmMakeDepend::AddFileToSearchPath(const char* file)
{
std::string filepath = file;
std::string::size_type pos = filepath.rfind('/');
if(pos != std::string::npos)
{
std::string path = filepath.substr(0, pos);
if(std::find(m_IncludeDirectories.begin(),
m_IncludeDirectories.end(), path)
== m_IncludeDirectories.end())
{
m_IncludeDirectories.push_back(path);
return;
}
}
}