-#include <msp/core/except.h>
+#include <stdexcept>
#include <msp/strings/utils.h>
#include "path.h"
#include "utils.h"
namespace {
+#ifdef _WIN32
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]==':'); }
+#endif
}
init(p);
}
+void Path::init(const string &p)
+{
+ if(p.empty())
+ return;
+ string::size_type start = 0;
+ while(start<p.size())
+ {
+ string::size_type slash = p.find_first_of("/\\", start);
+ if(slash>start || start==0)
+ add_component(p.substr(start, max<string::size_type>(slash-start, 1U)));
+ if(slash==string::npos)
+ break;
+ start = slash+1;
+ }
+}
+
unsigned Path::size() const
{
if(path.empty())
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;
+ return separators.size()+1;
}
bool Path::is_absolute() const
{
-#ifdef WIN32
+#ifdef _WIN32
if(is_windows_drive((*this)[0]))
return true;
#endif
- if(path[0]==DIRSEP)
- return true;
- return false;
+ return path[0]==DIRSEP;
}
Path Path::subpath(unsigned start, unsigned count) const
Path &Path::operator/=(const Path &p)
{
if(p.is_absolute())
- path = p.path;
+ *this = p;
else
{
for(Iterator i=p.begin(); i!=p.end(); ++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;
- }
-}
-
void Path::add_component(const string &comp)
{
- if(comp.empty())
- ;
- else if(comp.size()==1 && comp[0]==DIRSEP)
+ if(comp.size()==1 && (comp[0]=='/' || comp[0]=='\\'))
{
// Replace the path with the root directory
-#ifdef WIN32
- unsigned slash = path.find(DIRSEP);
+#ifdef _WIN32
+ string::size_type slash = (separators.empty() ? string::npos : separators.front());
if(is_windows_drive(path.substr(0, slash)))
+ {
path = path.substr(0, 2);
+ separators.clear();
+ }
else
#endif
- path = comp;
+ {
+ path.assign(1, DIRSEP);
+ separators.clear();
+ separators.push_back(0);
+ }
}
-#ifdef WIN32
+#ifdef _WIN32
else if(is_windows_drive(comp))
+ {
path = comp;
+ separators.clear();
+ }
#endif
else if(comp=="..")
{
// .. in root directory is a no-op
else if(path.size()==1 && path[0]==DIRSEP)
;
-#ifdef WIN32
+#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);
+ string::size_type start = (separators.empty() ? 0 : separators.back()+1);
if(!path.compare(start, string::npos, ".."))
{
// If the last component already is a .., add another
+ separators.push_back(path.size());
path += DIRSEP;
path += comp;
}
- else if(slash==string::npos)
+ else if(separators.empty())
path = ".";
else
{
- if(slash==0)
- slash = 1;
// Otherwise, erase the last component
- path.erase(slash, string::npos);
+ path.erase(separators.back(), string::npos);
+ separators.pop_back();
}
}
}
if(comp!="." && path.empty())
path = ".";
if(path.size()>1 || (path.size()==1 && path[0]!=DIRSEP))
+ {
+ separators.push_back(path.size());
path += DIRSEP;
+ }
path += comp;
}
}
+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 invalid_argument("Path::operator[]");
+}
-Path::Iterator::Iterator(const Path &p):
- path(p),
- start(0)
+bool Path::operator==(const Path &other) const
{
- 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;
+#ifdef _WIN32
+ return strcasecmp(path, other.path)==0;
+#else
+ return path==other.path;
#endif
- else
- end = path.path.find(DIRSEP);
}
-Path::Iterator &Path::Iterator::operator++()
+bool Path::operator<(const Path &other) const
{
- start = end;
- if(start>=path.path.size())
- return *this;
- if(path.path[start]==DIRSEP)
- ++start;
- end = path.path.find(DIRSEP, start);
- return *this;
+#ifdef _WIN32
+ return strcasecmp(path, other.path)<0;
+#else
+ return path<other.path;
+#endif
}
-Path::Iterator &Path::Iterator::operator--()
+bool Path::operator>(const Path &other) const
{
- if(start==0)
- return *this;
+#ifdef _WIN32
+ return strcasecmp(path, other.path)>0;
+#else
+ return path>other.path;
+#endif
+}
- 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;
+Path::Iterator::Iterator(const Path &p, bool e):
+ path(&p),
+ iter(e ? path->separators.end() : path->separators.begin()),
+ end(e || path->path.empty())
+{
+ update();
+}
+Path::Iterator &Path::Iterator::operator++()
+{
+ if(iter==path->separators.end())
+ end = true;
+ else
+ {
+ ++iter;
+ if(path->path.size()==1 && path->separators.size()==1)
+ end = true;
+ }
+ update();
return *this;
}
-string Path::Iterator::operator*() const
+Path::Iterator &Path::Iterator::operator--()
{
- if(start>=path.path.size())
- return string();
- if(start==end)
- return string();
- return path.path.substr(start, end-start);
+ if(end)
+ {
+ end = false;
+ if(path->path.size()==1 && path->separators.size()==1)
+ --iter;
+ }
+ else if(iter!=path->separators.begin())
+ --iter;
+ update();
+ return *this;
+}
+
+void Path::Iterator::update()
+{
+ if(end)
+ {
+ current.clear();
+ return;
+ }
+
+ string::size_type start = 0;
+ if(iter!=path->separators.begin())
+ {
+ PositionArray::const_iterator prev = iter;
+ start = *--prev+1;
+ }
+
+ string::size_type slash = string::npos;
+ if(iter!=path->separators.end())
+ slash = *iter;
+
+ if(slash==0)
+ current = path->path.substr(start, 1);
+ else
+ current = path->path.substr(start, slash-start);
}
} // namespace FS
projects / libs / core.git / blobdiff