1 files changed, 289 insertions, 0 deletions
diff --git a/Source/cmSourceFileLocation.cxx b/Source/cmSourceFileLocation.cxx
new file mode 100644
index 000000000..5525b618a
--- /dev/null
+++ b/Source/cmSourceFileLocation.cxx
@@ -0,0 +1,289 @@
+/*============================================================================
+  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 "cmSourceFileLocation.h"
+
+#include "cmMakefile.h"
+#include "cmLocalGenerator.h"
+#include "cmGlobalGenerator.h"
+#include "cmSystemTools.h"
+
+//----------------------------------------------------------------------------
+cmSourceFileLocation
+::cmSourceFileLocation(cmMakefile* mf, const char* name): Makefile(mf)
+{
+  this->AmbiguousDirectory = !cmSystemTools::FileIsFullPath(name);
+  this->AmbiguousExtension = true;
+  this->Directory = cmSystemTools::GetFilenamePath(name);
+  this->Name = cmSystemTools::GetFilenameName(name);
+  this->UpdateExtension(name);
+}
+
+//----------------------------------------------------------------------------
+void cmSourceFileLocation::Update(const char* name)
+{
+  if(this->AmbiguousDirectory)
+    {
+    this->UpdateDirectory(name);
+    }
+  if(this->AmbiguousExtension)
+    {
+    this->UpdateExtension(name);
+    }
+}
+
+//----------------------------------------------------------------------------
+void cmSourceFileLocation::Update(cmSourceFileLocation const& loc)
+{
+  if(this->AmbiguousDirectory && !loc.AmbiguousDirectory)
+    {
+    this->Directory = loc.Directory;
+    this->AmbiguousDirectory = false;
+    }
+  if(this->AmbiguousExtension && !loc.AmbiguousExtension)
+    {
+    this->Name = loc.Name;
+    this->AmbiguousExtension = false;
+    }
+}
+
+//----------------------------------------------------------------------------
+void cmSourceFileLocation::DirectoryUseSource()
+{
+  if(this->AmbiguousDirectory)
+    {
+    this->Directory =
+      cmSystemTools::CollapseFullPath(
+        this->Directory.c_str(), this->Makefile->GetCurrentDirectory());
+    this->AmbiguousDirectory = false;
+    }
+}
+
+//----------------------------------------------------------------------------
+void cmSourceFileLocation::DirectoryUseBinary()
+{
+  if(this->AmbiguousDirectory)
+    {
+    this->Directory =
+      cmSystemTools::CollapseFullPath(
+        this->Directory.c_str(), this->Makefile->GetCurrentOutputDirectory());
+    this->AmbiguousDirectory = false;
+    }
+}
+
+//----------------------------------------------------------------------------
+void cmSourceFileLocation::UpdateExtension(const char* name)
+{
+  // Check the extension.
+  std::string ext = cmSystemTools::GetFilenameLastExtension(name);
+  if(!ext.empty()) { ext = ext.substr(1); }
+
+  // The global generator checks extensions of enabled languages.
+  cmGlobalGenerator* gg =
+    this->Makefile->GetLocalGenerator()->GetGlobalGenerator();
+  cmMakefile* mf = this->Makefile;
+  const std::vector<std::string>& srcExts = mf->GetSourceExtensions();
+  const std::vector<std::string>& hdrExts = mf->GetHeaderExtensions();
+  if(gg->GetLanguageFromExtension(ext.c_str()) ||
+     std::find(srcExts.begin(), srcExts.end(), ext) != srcExts.end() ||
+     std::find(hdrExts.begin(), hdrExts.end(), ext) != hdrExts.end())
+    {
+    // This is a known extension.  Use the given filename with extension.
+    this->Name = cmSystemTools::GetFilenameName(name);
+    this->AmbiguousExtension = false;
+    }
+  else
+    {
+    // This is not a known extension.  See if the file exists on disk as
+    // named.
+    std::string tryPath;
+    if(this->AmbiguousDirectory)
+      {
+      // Check the source tree only because a file in the build tree should
+      // be specified by full path at least once.  We do not want this
+      // detection to depend on whether the project has already been built.
+      tryPath = this->Makefile->GetCurrentDirectory();
+      tryPath += "/";
+      }
+    if(!this->Directory.empty())
+      {
+      tryPath += this->Directory;
+      tryPath += "/";
+      }
+    tryPath += this->Name;
+    if(cmSystemTools::FileExists(tryPath.c_str(), true))
+      {
+      // We found a source file named by the user on disk.  Trust it's
+      // extension.
+      this->Name = cmSystemTools::GetFilenameName(name);
+      this->AmbiguousExtension = false;
+
+      // If the directory was ambiguous, it isn't anymore.
+      if(this->AmbiguousDirectory)
+        {
+        this->DirectoryUseSource();
+        }
+      }
+    }
+}
+
+//----------------------------------------------------------------------------
+void cmSourceFileLocation::UpdateDirectory(const char* name)
+{
+  // If a full path was given we know the directory.
+  if(cmSystemTools::FileIsFullPath(name))
+    {
+    this->Directory = cmSystemTools::GetFilenamePath(name);
+    this->AmbiguousDirectory = false;
+    }
+}
+
+//----------------------------------------------------------------------------
+bool
+cmSourceFileLocation
+::MatchesAmbiguousExtension(cmSourceFileLocation const& loc) const
+{
+  // This location's extension is not ambiguous but loc's extension
+  // is.  See if the names match as-is.
+  if(this->Name == loc.Name)
+    {
+    return true;
+    }
+
+  // Check if loc's name could possibly be extended to our name by
+  // adding an extension.
+  if(!(this->Name.size() > loc.Name.size() &&
+       this->Name.substr(0, loc.Name.size()) == loc.Name &&
+       this->Name[loc.Name.size()] == '.'))
+    {
+    return false;
+    }
+
+  // Only a fixed set of extensions will be tried to match a file on
+  // disk.  One of these must match if loc refers to this source file.
+  std::string ext = this->Name.substr(loc.Name.size()+1);
+  cmMakefile* mf = this->Makefile;
+  const std::vector<std::string>& srcExts = mf->GetSourceExtensions();
+  if(std::find(srcExts.begin(), srcExts.end(), ext) != srcExts.end())
+    {
+    return true;
+    }
+  const std::vector<std::string>& hdrExts = mf->GetHeaderExtensions();
+  if(std::find(hdrExts.begin(), hdrExts.end(), ext) != hdrExts.end())
+    {
+    return true;
+    }
+  return false;
+}
+
+//----------------------------------------------------------------------------
+bool cmSourceFileLocation::Matches(cmSourceFileLocation const& loc)
+{
+  if(this->AmbiguousExtension && loc.AmbiguousExtension)
+    {
+    // Both extensions are ambiguous.  Since only the old fixed set of
+    // extensions will be tried, the names must match at this point to
+    // be the same file.
+    if(this->Name != loc.Name)
+      {
+      return false;
+      }
+    }
+  else if(this->AmbiguousExtension)
+    {
+    // Only "this" extension is ambiguous.
+    if(!loc.MatchesAmbiguousExtension(*this))
+      {
+      return false;
+      }
+    }
+  else if(loc.AmbiguousExtension)
+    {
+    // Only "loc" extension is ambiguous.
+    if(!this->MatchesAmbiguousExtension(loc))
+      {
+      return false;
+      }
+    }
+  else
+    {
+    // Neither extension is ambiguous.
+    if(this->Name != loc.Name)
+      {
+      return false;
+      }
+    }
+
+  if(!this->AmbiguousDirectory && !loc.AmbiguousDirectory)
+    {
+    // Both sides have absolute directories.
+    if(this->Directory != loc.Directory)
+      {
+      return false;
+      }
+    }
+  else if(this->AmbiguousDirectory && loc.AmbiguousDirectory &&
+          this->Makefile == loc.Makefile)
+    {
+    // Both sides have directories relative to the same location.
+    if(this->Directory != loc.Directory)
+      {
+      return false;
+      }
+    }
+  else if(this->AmbiguousDirectory && loc.AmbiguousDirectory)
+    {
+    // Each side has a directory relative to a different location.
+    // This can occur when referencing a source file from a different
+    // directory.  This is not yet allowed.
+    this->Makefile->IssueMessage(
+      cmake::INTERNAL_ERROR,
+      "Matches error: Each side has a directory relative to a different "
+      "location. This can occur when referencing a source file from a "
+      "different directory.  This is not yet allowed."
+      );
+    return false;
+    }
+  else if(this->AmbiguousDirectory)
+    {
+    // Compare possible directory combinations.
+    std::string srcDir =
+      cmSystemTools::CollapseFullPath(
+        this->Directory.c_str(), this->Makefile->GetCurrentDirectory());
+    std::string binDir =
+      cmSystemTools::CollapseFullPath(
+        this->Directory.c_str(), this->Makefile->GetCurrentOutputDirectory());
+    if(srcDir != loc.Directory &&
+       binDir != loc.Directory)
+      {
+      return false;
+      }
+    }
+  else if(loc.AmbiguousDirectory)
+    {
+    // Compare possible directory combinations.
+    std::string srcDir =
+      cmSystemTools::CollapseFullPath(
+        loc.Directory.c_str(), loc.Makefile->GetCurrentDirectory());
+    std::string binDir =
+      cmSystemTools::CollapseFullPath(
+        loc.Directory.c_str(), loc.Makefile->GetCurrentOutputDirectory());
+    if(srcDir != this->Directory &&
+       binDir != this->Directory)
+      {
+      return false;
+      }
+    }
+
+  // File locations match.
+  this->Update(loc);
+  return true;
+}