-#include <cstdio>
-#ifndef WIN32
-#include <unistd.h>
-#endif
-#include <msp/core/systemerror.h>
#include <msp/strings/utils.h>
#include "dir.h"
-#include "path.h"
-#include "stat.h"
#include "utils.h"
using namespace std;
return result;
}
-Path readlink(const Path &link)
-{
-#ifdef WIN32
- (void)link;
- throw logic_error("no symbolic links on win32");
-#else
- char buf[4096];
- int len = ::readlink(link.str().c_str(), buf, sizeof(buf));
- if(len==-1)
- throw system_error("readlink");
- return string(buf, len);
-#endif
-}
-
-Path realpath(const Path &path)
-{
-#ifdef WIN32
- if(path.is_absolute())
- return path;
- else
- return getcwd()/path;
-#else
- list<string> queue(path.begin(), path.end());
- if(!path.is_absolute())
- {
- Path cwd = getcwd();
- queue.insert(queue.begin(), cwd.begin(), cwd.end());
- }
-
- Path real;
- unsigned n_links = 0;
- while(!queue.empty())
- {
- Path next = real/queue.front();
- queue.pop_front();
-
- if(is_link(next))
- {
- if(++n_links>64)
- throw runtime_error("too many symbolic links");
- Path link = readlink(next);
- queue.insert(queue.begin(), link.begin(), link.end());
- }
- else
- real = next;
- }
-
- return real;
-#endif
-}
-
-void rename(const Path &from, const Path &to)
-{
- if(::rename(from.str().c_str(), to.str().c_str())==-1)
- throw system_error("rename");
-}
-
-void unlink(const Path &path)
-{
- if(::unlink(path.str().c_str())==-1)
- throw system_error("unlink");
-}
-
Path relative(const Path &path, const Path &base)
{
+ if(path.is_absolute()!=base.is_absolute())
+ throw invalid_argument("FS::relative");
+
Path::Iterator i = path.begin();
Path::Iterator j = base.begin();
for(; (i!=path.end() && j!=base.end() && *i==*j); ++i, ++j) ;
return result;
}
+Path common_ancestor(const Path &path1, const Path &path2)
+{
+ Path::Iterator i = path1.begin();
+ Path::Iterator j = path2.begin();
+ Path result;
+ for(; (i!=path1.end() && j!=path2.end() && *i==*j); ++i, ++j)
+ result /= *i;
+ return result;
+}
+
int descendant_depth(const Path &path, const Path &parent)
{
+ if(path.is_absolute()!=parent.is_absolute())
+ throw invalid_argument("FS::descendant_depth");
+
Path::Iterator i = path.begin();
Path::Iterator j = parent.begin();
for(; (i!=path.end() && j!=parent.end() && *i==*j); ++i, ++j) ;