#include <string>
namespace Msp {
+namespace FS {
enum
{
#ifdef WIN32
- DIRCHAR='\\'
+ DIRSEP = '\\'
#else
- DIRCHAR='/'
+ DIRSEP = '/'
#endif
};
+/**
+Stores a filesystem path. Paths are always stored in a normalized form; there
+are never any "." or ".." components in the middle of the path, and relative
+paths always begin with a single "." component or a sequence ".." components.
+*/
class Path
{
public:
class Iterator
{
+ friend class Path;
+
+ private:
+ const Path &path;
+ std::string::size_type start,end;
+
+ Iterator(const Path &);
public:
Iterator &operator++();
Iterator &operator--();
std::string operator*() const;
bool operator==(const Iterator &i) const { return (start==i.start && end==i.end); }
bool operator!=(const Iterator &i) const { return !(*this==i); }
- private:
- const Path &path;
- unsigned start,end;
+ };
- Iterator(const Path &);
+private:
+ std::string path;
- friend class Path;
- };
+public:
+ Path();
+ Path(const std::string &);
+ Path(const char *);
- Path() { }
- Path(const std::string &p) { init(p); }
- Path(const char *p) { init(p); }
const std::string &str() const { return path; }
+
+ /// Returns the number of components in the path.
unsigned size() const;
+
bool empty() const { return path.empty(); }
- bool is_absolute() const;
- Path subpath(unsigned, unsigned =static_cast<unsigned>(-1)) const;
- Path operator/(const Path &p) const { Path a=*this; a/=p; return a; }
- Path &operator/=(const Path &);
+
+ /// Determines whether the path starts from the root directory
+ bool is_absolute() const;
+
+ /// Extracts a range of components from the path.
+ Path subpath(unsigned start, unsigned count = static_cast<unsigned>(-1)) const;
+
+ /// Concatenates this path with another one, with usual filesystem semantics
+ Path operator/(const Path &p) const;
+ Path &operator/=(const Path &);
+
+ /**
+ Extracts a single component from the path. Negative indices count from the
+ end of the path.
+ */
std::string operator[](int) const;
+
bool operator==(const Path &) const;
- Iterator begin() const { return Iterator(*this); }
- Iterator end() const { Iterator i(*this); i.start=i.end=std::string::npos; return i; }
+ Iterator begin() const;
+ Iterator end() const;
private:
- std::string path;
-
void init(const std::string &);
void add_component(const std::string &);
};
inline std::ostream &operator<<(std::ostream &o, const Path &p) { o<<p.str(); return o; }
+} // namespace FS
} // namespace Msp
#endif