X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Futils.cpp;h=4036225a0f2af593584931d1205fe64aeab82199;hb=50734eecb739210eb177a12c39d0ea93da10936a;hp=0ca1d6064e1bd2cfcfa48bd8a3b649efc7333ca0;hpb=a17d6ad286e19e2222ab8b6c9a762a83bf2c6c56;p=libs%2Fcore.git diff --git a/source/utils.cpp b/source/utils.cpp index 0ca1d60..4036225 100644 --- a/source/utils.cpp +++ b/source/utils.cpp @@ -6,6 +6,7 @@ Distributed under the LGPL */ #include +#include #include #ifndef WIN32 #include @@ -15,6 +16,7 @@ Distributed under the LGPL #include #include "dir.h" #include "path.h" +#include "stat.h" #include "utils.h" using namespace std; @@ -29,6 +31,12 @@ string basename(const Path &p) Path dirname(const Path &p) { + if(p.size()==1) + { + if(p.is_absolute()) + return p; + return "."; + } return p.subpath(0, p.size()-1); } @@ -40,7 +48,7 @@ string basepart(const string &fn) string extpart(const string &fn) { - unsigned dot=fn.rfind('.'); + string::size_type dot=fn.rfind('.'); if(dot==string::npos) return string(); return fn.substr(dot); @@ -78,6 +86,64 @@ Path fix_case(const Path &path) return result; } +Path readlink(const Path &link) +{ +#ifdef WIN32 + (void)link; + throw Exception("No symbolic links on win32"); +#else + char buf[4096]; + int len=::readlink(link.str().c_str(), buf, sizeof(buf)); + if(len==-1) + throw SystemError("readlink failed", errno); + return string(buf, len); +#endif +} + +Path realpath(const Path &path) +{ +#ifdef WIN32 + if(path.is_absolute()) + return path; + else + return getcwd()/path; +#else + list 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(); + + struct stat st=lstat(next); + if(S_ISLNK(st.st_mode)) + { + if(++n_links>64) + throw Exception("Ludicrous amount of symlinks detected in realpath, giving up"); + 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 SystemError("rename failed", errno); +} + void unlink(const Path &path) { if(::unlink(path.str().c_str())==-1) @@ -99,5 +165,21 @@ Path relative(const Path &path, const Path &base) return result; } +int descendant_depth(const Path &path, const Path &parent) +{ + Path::Iterator i=path.begin(); + Path::Iterator j=parent.begin(); + for(; (i!=path.end() && j!=parent.end() && *i==*j); ++i, ++j) ; + + if(j!=parent.end()) + return -1; + + int result = 0; + for(; i!=path.end(); ++i) + ++result; + + return result; +} + } // namespace FS } // namespace Msp