+bool CopyFileContents(std::string source, std::string target)
+{
+ FILE *sourcefile = fopen(source.c_str(), "rb");
+ if(sourcefile == NULL){
+ errorstream<<source<<": can't open for reading: "
+ <<strerror(errno)<<std::endl;
+ return false;
+ }
+
+ FILE *targetfile = fopen(target.c_str(), "wb");
+ if(targetfile == NULL){
+ errorstream<<target<<": can't open for writing: "
+ <<strerror(errno)<<std::endl;
+ fclose(sourcefile);
+ return false;
+ }
+
+ size_t total = 0;
+ bool retval = true;
+ bool done = false;
+ char readbuffer[BUFSIZ];
+ while(!done){
+ size_t readbytes = fread(readbuffer, 1,
+ sizeof(readbuffer), sourcefile);
+ total += readbytes;
+ if(ferror(sourcefile)){
+ errorstream<<source<<": IO error: "
+ <<strerror(errno)<<std::endl;
+ retval = false;
+ done = true;
+ }
+ if(readbytes > 0){
+ fwrite(readbuffer, 1, readbytes, targetfile);
+ }
+ if(feof(sourcefile) || ferror(sourcefile)){
+ // flush destination file to catch write errors
+ // (e.g. disk full)
+ fflush(targetfile);
+ done = true;
+ }
+ if(ferror(targetfile)){
+ errorstream<<target<<": IO error: "
+ <<strerror(errno)<<std::endl;
+ retval = false;
+ done = true;
+ }
+ }
+ infostream<<"copied "<<total<<" bytes from "
+ <<source<<" to "<<target<<std::endl;
+ fclose(sourcefile);
+ fclose(targetfile);
+ return retval;
+}
+
+bool CopyDir(std::string source, std::string target)
+{
+ if(PathExists(source)){
+ if(!PathExists(target)){
+ fs::CreateAllDirs(target);
+ }
+ bool retval = true;
+ std::vector<DirListNode> content = fs::GetDirListing(source);
+
+ for(unsigned int i=0; i < content.size(); i++){
+ std::string sourcechild = source + DIR_DELIM + content[i].name;
+ std::string targetchild = target + DIR_DELIM + content[i].name;
+ if(content[i].dir){
+ if(!fs::CopyDir(sourcechild, targetchild)){
+ retval = false;
+ }
+ }
+ else {
+ if(!fs::CopyFileContents(sourcechild, targetchild)){
+ retval = false;
+ }
+ }
+ }
+ return retval;
+ }
+ else {
+ return false;
+ }
+}
+
+bool PathStartsWith(std::string path, std::string prefix)
+{
+ size_t pathsize = path.size();
+ size_t pathpos = 0;
+ size_t prefixsize = prefix.size();
+ size_t prefixpos = 0;
+ for(;;){
+ bool delim1 = pathpos == pathsize
+ || IsDirDelimiter(path[pathpos]);
+ bool delim2 = prefixpos == prefixsize
+ || IsDirDelimiter(prefix[prefixpos]);
+
+ if(delim1 != delim2)
+ return false;
+
+ if(delim1){
+ while(pathpos < pathsize &&
+ IsDirDelimiter(path[pathpos]))
+ ++pathpos;
+ while(prefixpos < prefixsize &&
+ IsDirDelimiter(prefix[prefixpos]))
+ ++prefixpos;
+ if(prefixpos == prefixsize)
+ return true;
+ if(pathpos == pathsize)
+ return false;
+ }
+ else{
+ size_t len = 0;
+ do{
+ char pathchar = path[pathpos+len];
+ char prefixchar = prefix[prefixpos+len];
+ if(FILESYS_CASE_INSENSITIVE){
+ pathchar = tolower(pathchar);
+ prefixchar = tolower(prefixchar);
+ }
+ if(pathchar != prefixchar)
+ return false;
+ ++len;
+ } while(pathpos+len < pathsize
+ && !IsDirDelimiter(path[pathpos+len])
+ && prefixpos+len < prefixsize
+ && !IsDirDelimiter(
+ prefix[prefixpos+len]));
+ pathpos += len;
+ prefixpos += len;
+ }
+ }
+}
+
+std::string RemoveLastPathComponent(std::string path,
+ std::string *removed, int count)
+{
+ if(removed)
+ *removed = "";
+
+ size_t remaining = path.size();
+
+ for(int i = 0; i < count; ++i){
+ // strip a dir delimiter
+ while(remaining != 0 && IsDirDelimiter(path[remaining-1]))
+ remaining--;
+ // strip a path component
+ size_t component_end = remaining;
+ while(remaining != 0 && !IsDirDelimiter(path[remaining-1]))
+ remaining--;
+ size_t component_start = remaining;
+ // strip a dir delimiter
+ while(remaining != 0 && IsDirDelimiter(path[remaining-1]))
+ remaining--;
+ if(removed){
+ std::string component = path.substr(component_start,
+ component_end - component_start);
+ if(i)
+ *removed = component + DIR_DELIM + *removed;
+ else
+ *removed = component;
+ }
+ }
+ return path.substr(0, remaining);
+}
+
+std::string RemoveRelativePathComponents(std::string path)
+{
+ size_t pos = path.size();
+ size_t dotdot_count = 0;
+ while(pos != 0){
+ size_t component_with_delim_end = pos;
+ // skip a dir delimiter
+ while(pos != 0 && IsDirDelimiter(path[pos-1]))
+ pos--;
+ // strip a path component
+ size_t component_end = pos;
+ while(pos != 0 && !IsDirDelimiter(path[pos-1]))
+ pos--;
+ size_t component_start = pos;
+
+ std::string component = path.substr(component_start,
+ component_end - component_start);
+ bool remove_this_component = false;
+ if(component == "."){
+ remove_this_component = true;
+ }
+ else if(component == ".."){
+ remove_this_component = true;
+ dotdot_count += 1;
+ }
+ else if(dotdot_count != 0){
+ remove_this_component = true;
+ dotdot_count -= 1;
+ }
+
+ if(remove_this_component){
+ while(pos != 0 && IsDirDelimiter(path[pos-1]))
+ pos--;
+ path = path.substr(0, pos) + DIR_DELIM +
+ path.substr(component_with_delim_end,
+ std::string::npos);
+ pos++;
+ }
+ }
+
+ if(dotdot_count > 0)
+ return "";
+
+ // remove trailing dir delimiters
+ pos = path.size();
+ while(pos != 0 && IsDirDelimiter(path[pos-1]))
+ pos--;
+ return path.substr(0, pos);
+}
+
+bool safeWriteToFile(const std::string &path, const std::string &content)
+{
+ std::string tmp_file = path + ".~mt";
+
+ // Write to a tmp file
+ std::ofstream os(tmp_file.c_str(), std::ios::binary);
+ if (!os.good())
+ return false;
+ os << content;
+ os.flush();
+ os.close();
+ if (os.fail()) {
+ remove(tmp_file.c_str());
+ return false;
+ }
+
+ // Copy file
+ remove(path.c_str());
+ if(rename(tmp_file.c_str(), path.c_str())) {
+ remove(tmp_file.c_str());
+ return false;
+ } else {
+ return true;
+ }
+}
+