#include <simgear/debug/logstream.hxx>
#include <stdio.h>
#include <sys/stat.h>
-#include <sys/stat.h>
#ifdef _WIN32
# include <direct.h>
#endif
#include "sg_path.hxx"
+using std::string;
+
/**
* define directory path separators
#endif
-// If Unix, replace all ":" with "/". If MacOS, replace all "/" with
-// ":" it should go without saying that neither of these characters
-// should be used in file or directory names. In windoze, allow the
+// If Unix, replace all ":" with "/". In windoze, allow the
// second character to be a ":" for things like c:\foo\bar
void
// default constructor
SGPath::SGPath()
- : path("")
+ : path(""),
+ _cached(false)
{
}
// create a path based on "path"
SGPath::SGPath( const std::string& p )
- : path(p)
+ : path(p),
+ _cached(false)
+{
+ fix();
+}
+
+// create a path based on "path" and a "subpath"
+SGPath::SGPath( const SGPath& p, const std::string& r )
+ : path(p.path),
+ _cached(false)
{
+ append(r);
fix();
}
+SGPath::SGPath(const SGPath& p) :
+ path(p.path),
+ _cached(p._cached),
+ _exists(p._exists),
+ _isDir(p._isDir),
+ _isFile(p._isFile)
+{
+}
+
+SGPath& SGPath::operator=(const SGPath& p)
+{
+ path = p.path;
+ _cached = p._cached;
+ _exists = p._exists;
+ _isDir = p._isDir;
+ _isFile = p._isFile;
+ return *this;
+}
// destructor
SGPath::~SGPath() {
void SGPath::set( const string& p ) {
path = p;
fix();
+ _cached = false;
}
path += p;
}
fix();
+ _cached = false;
}
//add a new path component to the existing path string
path += p;
}
fix();
+ _cached = false;
}
}
}
-bool SGPath::exists() const {
- FILE* fp = fopen( path.c_str(), "r");
- if (fp == 0) {
- return false;
- }
- fclose(fp);
- return true;
+void SGPath::validate() const
+{
+ if (_cached) {
+ return;
+ }
+
+#ifdef _WIN32
+ struct _stat buf ;
+
+ if (_stat (path.c_str(), &buf ) < 0) {
+ _exists = false;
+ } else {
+ _exists = true;
+ _isFile = ((S_IFREG & buf.st_mode ) !=0);
+ _isDir = ((S_IFDIR & buf.st_mode ) !=0);
+ }
+
+#else
+ struct stat buf ;
+
+ if (stat(path.c_str(), &buf ) < 0) {
+ _exists = false;
+ } else {
+ _exists = true;
+ _isFile = ((S_ISREG(buf.st_mode )) != 0);
+ _isDir = ((S_ISDIR(buf.st_mode )) != 0);
+ }
+
+#endif
+ _cached = true;
+}
+
+bool SGPath::exists() const
+{
+ validate();
+ return _exists;
+}
+
+bool SGPath::isDir() const
+{
+ validate();
+ return _exists && _isDir;
+}
+
+bool SGPath::isFile() const
+{
+ validate();
+ return _exists && _isFile;
}
#ifdef _WIN32
return result;
}
+
+bool SGPath::isAbsolute() const
+{
+ if (path.empty()) {
+ return false;
+ }
+
+#ifdef _WIN32
+ // detect '[A-Za-z]:/'
+ if (path.size() > 2) {
+ if (isalpha(path[0]) && (path[1] == ':') && (path[2] == sgDirPathSep)) {
+ return true;
+ }
+ }
+#endif
+
+ return (path[0] == sgDirPathSep);
+}
+
+bool SGPath::isNull() const
+{
+ return path.empty() || (path == "");
+}