For PR495:

Get rid of the difference between file paths and directory paths. The Path
class now simply stores a path that can refer to either a file or a
directory. This required various changes in the implementation and interface
of the class with the corresponding impact to its users. Doxygen comments were
also updated to reflect these changes. Interface changes are:

appendDirectory -> appendComponent
appendFile -> appendComponent
elideDirectory -> eraseComponent
elideFile -> eraseComponent
elideSuffix -> eraseSuffix
renameFile -> rename
setDirectory -> set
setFile -> set

Changes pass Dejagnu and llvm-test/SingleSource tests.

llvm-svn: 22349

3 files changed, 83 insertions, 134 deletions

diff --git a/llvm/lib/System/Unix/Path.inc b/llvm/lib/System/Unix/Path.inc
index f871adb2c70..ffcd6949b5e 100644
--- a/llvm/lib/System/Unix/Path.inc
+++ b/llvm/lib/System/Unix/Path.inc
@@ -84,7 +84,7 @@ Path::isValid() const {
 Path
 Path::GetRootDirectory() {
   Path result;
-  result.setDirectory("/");
+  result.set("/");
   return result;
 }
 
@@ -98,7 +98,7 @@ Path::GetTemporaryDirectory() {
   if (0 == mkdtemp(pathname))
     ThrowErrno(std::string(pathname) + ": can't create temporary directory");
   Path result;
-  result.setDirectory(pathname);
+  result.set(pathname);
   assert(result.isValid() && "mkdtemp didn't create a valid pathname!");
   return result;
 #elif defined(HAVE_MKSTEMP)
@@ -117,7 +117,7 @@ Path::GetTemporaryDirectory() {
   if (-1 == ::mkdir(pathname, S_IRWXU)) // end race condition
     ThrowErrno(std::string(pathname) + ": can't create temporary directory");
   Path result;
-  result.setDirectory(pathname);
+  result.set(pathname);
   assert(result.isValid() && "mkstemp didn't create a valid pathname!");
   return result;
 #elif defined(HAVE_MKTEMP)
@@ -134,7 +134,7 @@ Path::GetTemporaryDirectory() {
   if (-1 == ::mkdir(TmpName, S_IRWXU))
     ThrowErrno(std::string(TmpName) + ": can't create temporary directory");
   Path result;
-  result.setDirectory(TmpName);
+  result.set(TmpName);
   assert(result.isValid() && "mktemp didn't create a valid pathname!");
   return result;
 #else
@@ -155,7 +155,7 @@ Path::GetTemporaryDirectory() {
   if (-1 == ::mkdir(pathname, S_IRWXU))
     ThrowErrno(std::string(pathname) + ": can't create temporary directory");
   Path result;
-  result.setDirectory(pathname);
+  result.set(pathname);
   assert(result.isValid() && "mkstemp didn't create a valid pathname!");
   return result;
 #endif
@@ -167,14 +167,14 @@ static void getPathList(const char*path, std::vector<sys::Path>& Paths) {
   Path tmpPath;
   while( delim != 0 ) {
     std::string tmp(at, size_t(delim-at));
-    if (tmpPath.setDirectory(tmp))
+    if (tmpPath.set(tmp))
       if (tmpPath.canRead())
         Paths.push_back(tmpPath);
     at = delim + 1;
     delim = strchr(at, ':');
   }
   if (*at != 0)
-    if (tmpPath.setDirectory(std::string(at)))
+    if (tmpPath.set(std::string(at)))
       if (tmpPath.canRead())
         Paths.push_back(tmpPath);
 
@@ -204,7 +204,7 @@ Path::GetBytecodeLibraryPaths(std::vector<sys::Path>& Paths) {
 #ifdef LLVM_LIBDIR
   {
     Path tmpPath;
-    if (tmpPath.setDirectory(LLVM_LIBDIR))
+    if (tmpPath.set(LLVM_LIBDIR))
       if (tmpPath.canRead())
         Paths.push_back(tmpPath);
   }
@@ -222,7 +222,7 @@ Path::GetUserHomeDirectory() {
   const char* home = getenv("HOME");
   if (home) {
     Path result;
-    if (result.setDirectory(home))
+    if (result.set(home))
       return result;
   }
   return GetRootDirectory();
@@ -230,12 +230,20 @@ Path::GetUserHomeDirectory() {
 
 bool
 Path::isFile() const {
-  return (isValid() && path[path.length()-1] != '/');
+  struct stat buf;
+  if (0 != stat(path.c_str(), &buf)) {
+    ThrowErrno(path + ": can't determine type of path object: ");
+  }
+  return S_ISREG(buf.st_mode);
 }
 
 bool
 Path::isDirectory() const {
-  return (isValid() && path[path.length()-1] == '/');
+  struct stat buf;
+  if (0 != stat(path.c_str(), &buf)) {
+    ThrowErrno(path + ": can't determine type of path object: ");
+  }
+  return S_ISDIR(buf.st_mode);
 }
 
 std::string
@@ -357,8 +365,6 @@ Path::getStatusInfo(StatusInfo& info) const {
   info.user = buf.st_uid;
   info.group = buf.st_gid;
   info.isDir = S_ISDIR(buf.st_mode);
-  if (info.isDir && path[path.length()-1] != '/')
-    path += '/';
 }
 
 static bool AddPermissionBits(const std::string& Filename, int bits) {
@@ -419,8 +425,6 @@ Path::getDirectoryContents(std::set<Path>& result) const {
         ThrowErrno(aPath.path + 
           ": can't determine file object type", stat_errno);
       }
-      if (S_ISDIR(buf.st_mode))
-        aPath.path += "/";
       result.insert(aPath);
     }
   }
@@ -430,124 +434,84 @@ Path::getDirectoryContents(std::set<Path>& result) const {
 }
 
 bool
-Path::setDirectory(const std::string& a_path) {
-  if (a_path.size() == 0)
+Path::set(const std::string& a_path) {
+  if (a_path.empty())
     return false;
-  Path save(*this);
+  std::string save(path);
   path = a_path;
-  size_t last = a_path.size() -1;
-  if (a_path[last] != '/')
-    path += '/';
   if (!isValid()) {
-    path = save.path;
+    path = save;
     return false;
   }
   return true;
 }
 
 bool
-Path::setFile(const std::string& a_path) {
-  if (a_path.size() == 0)
-    return false;
-  Path save(*this);
-  path = a_path;
-  size_t last = a_path.size() - 1;
-  while (last > 0 && a_path[last] == '/')
-    last--;
-  path.erase(last+1);
-  if (!isValid()) {
-    path = save.path;
+Path::appendComponent(const std::string& name) {
+  if (name.empty())
     return false;
+  std::string save(path);
+  if (!path.empty()) {
+    size_t last = path.size() - 1;
+    if (path[last] != '/') 
+      path += '/';
   }
-  return true;
-}
-
-bool
-Path::appendDirectory(const std::string& dir) {
-  if (isFile()) 
-    return false;
-  Path save(*this);
-  path += dir;
-  path += "/";
+  path += name;
   if (!isValid()) {
-    path = save.path;
+    path = save;
     return false;
   }
   return true;
 }
 
 bool
-Path::elideDirectory() {
-  if (isFile()) 
-    return false;
+Path::eraseComponent() {
   size_t slashpos = path.rfind('/',path.size());
-  if (slashpos == 0 || slashpos == std::string::npos)
-    return false;
+  if (slashpos == 0 || slashpos == std::string::npos) {
+    path.erase();
+    return true;
+  }
   if (slashpos == path.size() - 1)
     slashpos = path.rfind('/',slashpos-1);
-  if (slashpos == std::string::npos)
-    return false;
-  path.erase(slashpos);
-  return true;
-}
-
-bool
-Path::appendFile(const std::string& file) {
-  if (!isDirectory()) 
-    return false;
-  Path save(*this);
-  path += file;
-  if (!isValid()) {
-    path = save.path;
-    return false;
+  if (slashpos == std::string::npos) {
+    path.erase();
+    return true;
   }
-  return true;
-}
-
-bool
-Path::elideFile() {
-  if (isDirectory()) 
-    return false;
-  size_t slashpos = path.rfind('/',path.size());
-  if (slashpos == std::string::npos)
-    return false;
-  path.erase(slashpos+1);
+  path.erase(slashpos);
   return true;
 }
 
 bool
 Path::appendSuffix(const std::string& suffix) {
-  if (isDirectory()) 
-    return false;
-  Path save(*this);
+  std::string save(path);
   path.append(".");
   path.append(suffix);
   if (!isValid()) {
-    path = save.path;
+    path = save;
     return false;
   }
   return true;
 }
 
-bool 
-Path::elideSuffix() {
-  if (isDirectory()) return false;
+bool
+Path::eraseSuffix() {
+  std::string save(path);
   size_t dotpos = path.rfind('.',path.size());
   size_t slashpos = path.rfind('/',path.size());
-  if (slashpos != std::string::npos && dotpos != std::string::npos &&
+  if (slashpos != std::string::npos && 
+      dotpos != std::string::npos &&
       dotpos > slashpos) {
     path.erase(dotpos, path.size()-dotpos);
-    return true;
   }
-  return false;
+  if (!isValid()) {
+    path = save;
+    return false;
+  }
+  return true;
 }
 
-
 bool
 Path::createDirectory( bool create_parents) {
-  // Make sure we're dealing with a directory
-  if (!isDirectory()) return false;
-
   // Get a writeable copy of the path name
   char pathname[MAXPATHLEN];
   path.copy(pathname,MAXPATHLEN);
@@ -586,9 +550,6 @@ Path::createDirectory( bool create_parents) {
 
 bool
 Path::createFile() {
-  // Make sure we're dealing with a file
-  if (!isFile()) return false; 
-
   // Create the file
   int fd = ::creat(path.c_str(), S_IRUSR | S_IWUSR);
   if (fd < 0)
@@ -600,10 +561,6 @@ Path::createFile() {
 
 bool
 Path::createTemporaryFile(bool reuse_current) {
-  // Make sure we're dealing with a file
-  if (!isFile()) 
-    return false;
-
   // Make this into a unique file name
   makeUnique( reuse_current );
 
@@ -617,45 +574,38 @@ Path::createTemporaryFile(bool reuse_current) {
 }
 
 bool
-Path::destroyDirectory(bool remove_contents) const {
+Path::destroy(bool remove_contents) const {
   // Make sure we're dealing with a directory
-  if (!isDirectory()) return false;
-
-  // If it doesn't exist, we're done.
-  if (!exists()) return true;
-
-  if (remove_contents) {
-    // Recursively descend the directory to remove its content
-    std::string cmd("/bin/rm -rf ");
-    cmd += path;
-    system(cmd.c_str());
-  } else {
-    // Otherwise, try to just remove the one directory
-    char pathname[MAXPATHLEN];
-    path.copy(pathname,MAXPATHLEN);
-    int lastchar = path.length() - 1 ; 
-    if (pathname[lastchar] == '/') 
-      pathname[lastchar] = 0;
-    else
-      pathname[lastchar+1] = 0;
-    if ( 0 != rmdir(pathname))
-      ThrowErrno(std::string(pathname) + ": can't destroy directory");
+  if (isFile()) {
+    if (0 != unlink(path.c_str()))
+      ThrowErrno(path + ": can't destroy file");
+  } else if (isDirectory()) {
+    if (remove_contents) {
+      // Recursively descend the directory to remove its content
+      std::string cmd("/bin/rm -rf ");
+      cmd += path;
+      system(cmd.c_str());
+    } else {
+      // Otherwise, try to just remove the one directory
+      char pathname[MAXPATHLEN];
+      path.copy(pathname,MAXPATHLEN);
+      int lastchar = path.length() - 1 ; 
+      if (pathname[lastchar] == '/') 
+        pathname[lastchar] = 0;
+      else
+        pathname[lastchar+1] = 0;
+      if ( 0 != rmdir(pathname))
+        ThrowErrno(std::string(pathname) + ": can't destroy directory");
+    }
   }
+  else
+    return false;
   return true;
 }
 
 bool
-Path::destroyFile() const {
-  if (!isFile()) return false;
-  if (0 != unlink(path.c_str()))
-    ThrowErrno(path + ": can't destroy file");
-  return true;
-}
-
-bool
-Path::renameFile(const Path& newName) {
-  if (!isFile()) return false;
-  if (0 != rename(path.c_str(), newName.c_str()))
+Path::rename(const Path& newName) {
+  if (0 != ::rename(path.c_str(), newName.c_str()))
     ThrowErrno(std::string("can't rename '") + path + "' as '" + 
                newName.toString() + "' ");
   return true;
@@ -663,7 +613,6 @@ Path::renameFile(const Path& newName) {
 
 bool
 Path::setStatusInfo(const StatusInfo& si) const {
-  if (!isFile()) return false;
   struct utimbuf utb;
   utb.actime = si.modTime.toPosixTime();
   utb.modtime = utb.actime;
diff --git a/llvm/lib/System/Unix/Program.inc b/llvm/lib/System/Unix/Program.inc
index 774bd02e88b..8aa0705726b 100644
--- a/llvm/lib/System/Unix/Program.inc
+++ b/llvm/lib/System/Unix/Program.inc
@@ -42,7 +42,7 @@ Program::FindProgramByName(const std::string& progName) {
   if (progName.length() == 0) // no program
     return Path();
   Path temp;
-  if (!temp.setFile(progName)) // invalid name
+  if (!temp.set(progName)) // invalid name
     return Path();
   // FIXME: have to check for absolute filename - we cannot assume anything
   // about "." being in $PATH
@@ -64,8 +64,8 @@ Program::FindProgramByName(const std::string& progName) {
 
     // Check to see if this first directory contains the executable...
     Path FilePath;
-    if (FilePath.setDirectory(std::string(PathStr,Colon))) {
-      FilePath.appendFile(progName);
+    if (FilePath.set(std::string(PathStr,Colon))) {
+      FilePath.appendComponent(progName);
       if (FilePath.canExecute())
         return FilePath;                    // Found the executable!
     }
diff --git a/llvm/lib/System/Unix/Signals.inc b/llvm/lib/System/Unix/Signals.inc
index d02d2007c52..ce5b94b9470 100644
--- a/llvm/lib/System/Unix/Signals.inc
+++ b/llvm/lib/System/Unix/Signals.inc
@@ -112,7 +112,7 @@ RETSIGTYPE SignalHandler(int Sig) {
 
   if (DirectoriesToRemove != 0)
     while (!DirectoriesToRemove->empty()) {
-      DirectoriesToRemove->back().destroyDirectory(true);
+      DirectoriesToRemove->back().destroy(true);
       DirectoriesToRemove->pop_back();
     }