CMake/Source/cmMakeDepend.cxx

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#ifdef _MSC_VER
#pragma warning ( disable : 4786 )
#endif
#include "cmMakeDepend.h"
#include "cmSystemTools.h"
#include <fstream>
#include <iostream>
#include <algorithm>
#include <functional>
cmMakeDepend::cmMakeDepend()
{
m_Verbose = false;
m_IncludeFileRegularExpression.compile("^itk|^vtk|^vnl|^vcl|^f2c");
}
// only files matching this regular expression with be considered
void cmMakeDepend::SetIncludeRegularExpression(const char* prefix)
{
m_IncludeFileRegularExpression.compile(prefix);
}
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 cmClassFile array can
// be updated with the depend information in the cmMakefile.
void cmMakeDepend::SetMakefile(cmMakefile* makefile)
{
m_Makefile = makefile;
// Now extract any include paths from the makefile flags
cmCollectFlags& flags = m_Makefile->GetBuildFlags();
std::vector<std::string>& includes = flags.GetIncludeDirectories();
std::vector<std::string>::iterator j;
for(j = includes.begin(); j != includes.end(); ++j)
{
this->AddSearchPath(j->c_str());
}
// Now create cmDependInformation objects for files in the directory
int index = 0;
std::vector<cmClassFile>::iterator i = makefile->m_Classes.begin();
while(i != makefile->m_Classes.end())
{
if(!(*i).m_HeaderFileOnly)
{
cmDependInformation* info = new cmDependInformation;
info->m_FullPath = this->FullPath((*i).m_FullPath.c_str());
this->AddFileToSearchPath(info->m_FullPath.c_str());
info->m_IncludeName = (*i).m_FullPath;
m_DependInformation.push_back(info);
info->m_ClassFileIndex = index;
}
++i;
index++;
}
}
// 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.
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 cmClassFile
// in the cmMakefile m_Makefile
for(DependArray::iterator i = m_DependInformation.begin();
i != m_DependInformation.end(); ++i)
{
cmDependInformation* info = *i;
// Remove duplicate depends
info->RemoveDuplicateIndices();
std::vector<cmClassFile>::iterator j = m_Makefile->m_Classes.begin();
// find the class
if(info->m_ClassFileIndex != -1)
{
cmClassFile& cfile = m_Makefile->m_Classes[info->m_ClassFileIndex];
for( std::vector<int>::iterator indx = info->m_Indices.begin();
indx != info->m_Indices.end(); ++indx)
{
cfile.m_Depends.push_back(m_DependInformation[*indx]->m_FullPath);
}
}
}
}
// This function actually reads the file
// and scans it for #include directives
void cmMakeDepend::Depend(cmDependInformation* info)
{
const char* path = info->m_FullPath.c_str();
if(!path)
{
std::cerr << "no full path for object" << std::endl;
return;
}
std::ifstream fin(path);
if(!fin)
{
std::cerr << "error can not open " << info->m_FullPath << std::endl;
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)
{
std::cerr << "unknown include directive " << currentline
<< std::endl;
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::cerr << "skipping " << includeFile << " for file " << path << std::endl;
}
continue;
}
// 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(includeFile.c_str());
// add the index to the depends of the current
// depend info object
info->m_Indices.push_back(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);
}
}
info->m_DependDone = true;
}
// 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)
{
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;
}
// remove duplicate indices from the depend information
void cmDependInformation::RemoveDuplicateIndices()
{
// sort the array
std::sort(m_Indices.begin(), m_Indices.end(), std::less<int>());
// remove duplicates
std::vector<int>::iterator new_end =
std::unique(m_Indices.begin(), m_Indices.end());
m_Indices.erase(new_end, m_Indices.end());
}
// add the depend information from info to the m_Indices varible of this class.
void cmDependInformation::MergeInfo(cmDependInformation* info)
{
std::vector<int>::iterator i = info->m_Indices.begin();
for(; i!= info->m_Indices.end(); ++i)
{
m_Indices.push_back(*i);
}
}
// find the full path to fname by searching the m_IncludeDirectories array
std::string cmMakeDepend::FullPath(const char* fname)
{
for(std::vector<std::string>::iterator i = m_IncludeDirectories.begin();
i != m_IncludeDirectories.end(); ++i)
{
if(cmSystemTools::FileExists(fname))
{
return std::string(fname);
}
std::string path = *i;
path = path + "/";
path = path + fname;
if(cmSystemTools::FileExists(path.c_str()))
{
return path;
}
}
std::cerr << "Depend: File not found " << fname << std::endl;
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;
}
}
}