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#pragma once
#include <string>
#include <stdexcept>
#include "helpers.h"
namespace helpers {
/// Path helper class (because I don't want to include boost)
class path
{
#ifdef _WIN32
static const char SEP = '\\';
#else
static const char SEP = '/';
#endif
::std::string m_str;
public:
path()
{
}
path(const ::std::string& s):
path(s.c_str())
{
}
path(const char* s);
bool is_valid() const {
return m_str != "";
}
path operator/(const path& p) const
{
if(!this->is_valid())
throw ::std::runtime_error("Appending to an invalid path");
if(!p.is_valid())
throw ::std::runtime_error("Appending from an invalid path");
if(p.m_str[0] == '/')
throw ::std::runtime_error("Appending an absolute path to another path");
return *this / p.m_str.c_str();
}
/// Append a relative path
path operator/(const char* o) const
{
if(!this->is_valid())
throw ::std::runtime_error("Appending to an invalid path");
if (o[0] == '/')
throw ::std::runtime_error("Appending an absolute path to another path");
auto rv = *this;
rv.m_str.push_back(SEP);
rv.m_str.append(o);
return rv;
}
/// Add an arbitary string to the final component
path operator+(const char* o) const
{
if(!this->is_valid())
throw ::std::runtime_error("Appending a string to an invalid path");
if( ::std::strchr(o, SEP) != nullptr )
throw ::std::runtime_error("Appending a string containing the path separator (with operator+)");
auto rv = *this;
rv.m_str.append(o);
return rv;
}
path parent() const
{
if(!this->is_valid())
throw ::std::runtime_error("Calling parent() on an invalid path");
auto pos = m_str.find_last_of(SEP);
if(pos == ::std::string::npos)
{
return *this;
}
else
{
path rv;
rv.m_str = m_str.substr(0, pos);
return rv;
}
}
const ::std::string& str() const
{
return m_str;
}
operator ::std::string() const
{
return m_str;
}
class ComponentsIter
{
const path& p;
size_t pos;
size_t end;
friend class path;
ComponentsIter(const path& p, size_t i): p(p), pos(i) {
end = p.m_str.find(SEP, pos);
if(end == ::std::string::npos)
end = p.m_str.size();
}
public:
string_view operator*() const {
return string_view(p.m_str.c_str() + pos, end - pos);
}
void operator++();
bool operator!=(const ComponentsIter& x) const {
return pos != x.pos;
}
};
ComponentsIter begin() const {
return ComponentsIter(*this, 0);
}
ComponentsIter end() const {
return ComponentsIter(*this, m_str.size());
}
path normalise() const;
//void normalise_in_place();
friend ::std::ostream& operator<<(::std::ostream& os, const path& p)
{
return os << p.m_str;
}
};
}
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