Split directory and stat related functions into their own files

[libs/core.git] / source / dir.cpp

diff --git a/source/dir.cpp b/source/dir.cpp
new file mode 100644 (file)
index 0000000..c402ec9
--- /dev/null
+++ b/source/dir.cpp
@@ -0,0 +1,137 @@
+/* $Id$
+
+This file is part of libmspfs
+Copyright © 2006-2008  Mikko Rasa, Mikkosoft Productions
+Distributed under the LGPL
+*/
+
+#include <cstdlib>
+#include <cerrno>
+#include <dirent.h>
+#include <sys/stat.h>
+#include <msp/core/except.h>
+#include "dir.h"
+#include "path.h"
+#include "stat.h"
+#include "utils.h"
+
+using namespace std;
+
+namespace Msp {
+namespace FS {
+
+void mkdir(const Path &path, int mode)
+{
+       int err;
+#ifdef WIN32
+       // The win32 version of this function doesn't take the mode argument.  Go figure.
+       (void)mode;
+       err=::mkdir(path.str().c_str());
+#else
+       err=::mkdir(path.str().c_str(), mode);
+#endif
+
+       if(err==-1)
+               throw SystemError("mkdir failed", errno);
+}
+
+/**
+Creates a directory and any parent directories if needed.
+
+@param   path  The path to create
+@param   mode  Access mode for new directories
+
+@return  0 on success, -1 on error
+*/
+void mkpath(const Path &path, int mode)
+{
+       Path p;
+       for(Path::Iterator i=path.begin(); i!=path.end(); ++i)
+       {
+               p/=*i;
+#ifdef WIN32
+               if(p.size()==1 && is_windows_drive(*i))
+                       continue;
+#endif
+               struct stat st;
+               int err=stat(p, st);
+               if(err==0)
+               {
+                       if(!S_ISDIR(st.st_mode))
+                               throw Exception("A component exists and is not a directory");
+                       continue;
+               }
+               else if(errno!=ENOENT)
+                       throw SystemError("stat failed", errno);
+               else
+                       mkdir(p, mode);
+       }
+}
+
+void rmdir(const Path &path)
+{
+       if(::rmdir(path.str().c_str())==-1)
+               throw SystemError("rmdir failed", errno);
+}
+
+void rmdirs(const Path &path)
+{
+       list<string> files=list_files(path);
+       for(list<string>::iterator i=files.begin(); i!=files.end(); ++i)
+       {
+               Path p=path / *i;
+               struct stat st=stat(p.str().c_str());
+               if(S_ISDIR(st.st_mode))
+                       rmdirs(p);
+               else
+                       unlink(p);
+       }
+
+       rmdir(path);
+}
+
+list<string> list_files(const Path &path)
+{
+       list<string> result;
+       DIR *dir=opendir(path.str().c_str());
+       if(dir)
+       {
+               while(dirent *de=readdir(dir))
+               {
+                       const char *fn=de->d_name;
+                       if(fn[0]=='.' && (fn[1]==0 || (fn[1]=='.' && fn[2]==0))) 
+                               continue;
+                       result.push_back(fn);
+               }
+               closedir(dir);
+       }
+
+       return result;
+}
+
+Path getcwd()
+{
+       char buf[1024];
+       return ::getcwd(buf, sizeof(buf));
+}
+
+Path get_home_dir()
+{
+#ifndef WIN32
+       const char *home=getenv("HOME");
+       if(home)
+               return home;
+       return ".";
+#else
+       return ".";
+#endif
+}
+
+void chdir(const Path &path)
+{
+       if(::chdir(path.str().c_str())==-1)
+               throw SystemError("chdir failed", errno);
+}
+
+} // namespace FS
+} // namespace Msp