+++ /dev/null
-/* $Id$
-
-This file is part of libmspfs
-Copyright © 2006-2008 Mikko Rasa, Mikkosoft Productions
-Distributed under the LGPL
-*/
-
-#include <msp/core/except.h>
-#include <msp/strings/utils.h>
-#include "path.h"
-#include "utils.h"
-
-using namespace std;
-
-namespace {
-
-inline bool is_windows_drive(const std::string &p)
-{ return (p.size()==2 && ((p[0]>='A' && p[0]<='Z') || (p[0]>='a' && p[0]<='z')) && p[1]==':'); }
-
-}
-
-namespace Msp {
-namespace FS {
-
-Path::Path()
-{ }
-
-Path::Path(const string &p)
-{
- init(p);
-}
-
-Path::Path(const char *p)
-{
- init(p);
-}
-
-unsigned Path::size() const
-{
- if(path.empty())
- return 0;
- if(path.size()==1 && path[0]==DIRSEP)
- return 1;
-
- unsigned count = 1;
- for(string::const_iterator i=path.begin(); i!=path.end(); ++i)
- if(*i==DIRSEP) ++count;
- return count;
-}
-
-bool Path::is_absolute() const
-{
-#ifdef WIN32
- if(is_windows_drive((*this)[0]))
- return true;
-#endif
- if(path[0]==DIRSEP)
- return true;
- return false;
-}
-
-Path Path::subpath(unsigned start, unsigned count) const
-{
- Path result;
- Iterator i = begin();
- for(unsigned j=0; (j<start && i!=end()); ++j)
- ++i;
- for(unsigned j=0; (j<count && i!=end()); ++j)
- {
- result /= *i;
- ++i;
- }
- return result;
-}
-
-Path Path::operator/(const Path &p) const
-{
- Path a = *this;
- a /= p;
- return a;
-}
-
-/**
-Attaches another path to the end of this one. An absolute path replaces the
-existing data. ".." elements annihilate the last component and "." elements
-are ignored.
-*/
-Path &Path::operator/=(const Path &p)
-{
- if(p.is_absolute())
- path = p.path;
- else
- {
- for(Iterator i=p.begin(); i!=p.end(); ++i)
- add_component(*i);
- }
- return *this;
-}
-
-string Path::operator[](int n) const
-{
- if(n>=0)
- {
- for(Iterator i=begin(); i!=end(); ++i, --n)
- if(!n)
- return *i;
- }
- else
- {
- for(Iterator i=end(); i!=begin();)
- {
- --i;
- if(!++n)
- return *i;
- }
- }
-
- throw InvalidParameterValue("Path component index out of range");
-}
-
-bool Path::operator==(const Path &p) const
-{
-#ifdef WIN32
- return !strcasecmp(path, p.path);
-#else
- return path==p.path;
-#endif
-}
-
-Path::Iterator Path::begin() const
-{
- return Iterator(*this);
-}
-
-Path::Iterator Path::end() const
-{
- Iterator i(*this);
- i.start=i.end = std::string::npos;
- return i;
-}
-
-void Path::init(const string &p)
-{
- string::size_type start = 0;
- if(p[0]=='/' || p[0]=='\\')
- add_component(string(1, DIRSEP));
- while(1)
- {
- string::size_type slash = p.find_first_of("/\\", start);
- if(slash>start)
- add_component(p.substr(start, slash-start));
- if(slash==string::npos)
- break;
- start = slash+1;
- }
-}
-
-/**
-Adds a single component to the path, emulating the cd command. Fails horribly
-if comp contains a separator character.
-*/
-void Path::add_component(const string &comp)
-{
- if(comp.empty())
- ;
- else if(comp.size()==1 && comp[0]==DIRSEP)
- {
- // Replace the path with the root directory
-#ifdef WIN32
- unsigned slash = path.find(DIRSEP);
- if(is_windows_drive(path.substr(0, slash)))
- path = path.substr(0, 2);
- else
-#endif
- path = comp;
- }
-#ifdef WIN32
- else if(is_windows_drive(comp))
- path = comp;
-#endif
- else if(comp=="..")
- {
- if(path.empty() || path==".")
- path = comp;
- // .. in root directory is a no-op
- else if(path.size()==1 && path[0]==DIRSEP)
- ;
-#ifdef WIN32
- else if(is_windows_drive(path))
- ;
-#endif
- else
- {
- string::size_type slash = path.rfind(DIRSEP);
- string::size_type start = (slash==string::npos ? 0 : slash+1);
- if(!path.compare(start, string::npos, ".."))
- {
- // If the last component already is a .., add another
- path += DIRSEP;
- path += comp;
- }
- else if(slash==string::npos)
- path = ".";
- else
- {
- if(slash==0)
- slash = 1;
- // Otherwise, erase the last component
- path.erase(slash, string::npos);
- }
- }
- }
- else if(comp!="." || path.empty())
- {
- if(comp!="." && path.empty())
- path = ".";
- if(path.size()>1 || (path.size()==1 && path[0]!=DIRSEP))
- path += DIRSEP;
- path += comp;
- }
-}
-
-
-Path::Iterator::Iterator(const Path &p):
- path(p),
- start(0)
-{
- if(path.path.empty())
- start=end = string::npos;
- else if(path.path[0]==DIRSEP)
- end = 1;
-#ifdef WIN32
- else if(path.path.size()>2 && path.path[2]==DIRSEP && is_windows_drive(path.path.substr(0, 2)))
- end = 2;
-#endif
- else
- end = path.path.find(DIRSEP);
-}
-
-Path::Iterator &Path::Iterator::operator++()
-{
- start = end;
- if(start>=path.path.size())
- return *this;
- if(path.path[start]==DIRSEP)
- ++start;
- end = path.path.find(DIRSEP, start);
- return *this;
-}
-
-Path::Iterator &Path::Iterator::operator--()
-{
- if(start==0)
- return *this;
-
- end = start;
- if(end>1 && end<path.path.size() && path.path[end]!=DIRSEP)
- --end;
-
- start = path.path.rfind(DIRSEP, end-1);
- if(start==string::npos)
- start = 0;
- else if(start<end-1)
- ++start;
-
- return *this;
-}
-
-string Path::Iterator::operator*() const
-{
- if(start>=path.path.size())
- return string();
- if(start==end)
- return string();
- return path.path.substr(start, end-start);
-}
-
-} // namespace FS
-} // namespace Msp
projects / libs / core.git / blobdiff