Allow wave_heights up to two nodes. #9220 - minetest.git - modified minetest for gpcfs purposes

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author	Lars Hofhansl <larsh@apache.org>	2019-12-21 06:33:59 -0800
committer	Lars Hofhansl <larsh@apache.org>	2019-12-21 06:33:59 -0800
commit	9c28acd29b4151a22e305c666b6aeafadc190a59 (patch)
tree	fb68324eab73a4b168dcbc6c7c0d97b454ebe19f /doc/README.android
parent	37f771a95bd54e2072f07783df142da4a91e7bff (diff)
download	minetest-9c28acd29b4151a22e305c666b6aeafadc190a59.tar.gz minetest-9c28acd29b4151a22e305c666b6aeafadc190a59.tar.bz2 minetest-9c28acd29b4151a22e305c666b6aeafadc190a59.zip

Allow wave_heights up to two nodes. #9220

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/* Minetest Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com> This program is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #include "filesys.h" #include "util/string.h" #include <iostream> #include <stdio.h> #include <string.h> #include <errno.h> #include <fstream> #include "log.h" #include "config.h" namespace fs { #ifdef _WIN32 // WINDOWS #define _WIN32_WINNT 0x0501 #include <windows.h> #include <shlwapi.h> std::vector<DirListNode> GetDirListing(const std::string &pathstring) { std::vector<DirListNode> listing; WIN32_FIND_DATA FindFileData; HANDLE hFind = INVALID_HANDLE_VALUE; DWORD dwError; std::string dirSpec = pathstring + "\\*"; // Find the first file in the directory. hFind = FindFirstFile(dirSpec.c_str(), &FindFileData); if (hFind == INVALID_HANDLE_VALUE) { dwError = GetLastError(); if (dwError != ERROR_FILE_NOT_FOUND && dwError != ERROR_PATH_NOT_FOUND) { errorstream << "GetDirListing: FindFirstFile error." << " Error is " << dwError << std::endl; } } else { // NOTE: // Be very sure to not include '..' in the results, it will // result in an epic failure when deleting stuff. DirListNode node; node.name = FindFileData.cFileName; node.dir = FindFileData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY; if (node.name != "." && node.name != "..") listing.push_back(node); // List all the other files in the directory. while (FindNextFile(hFind, &FindFileData) != 0) { DirListNode node; node.name = FindFileData.cFileName; node.dir = FindFileData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY; if(node.name != "." && node.name != "..") listing.push_back(node); } dwError = GetLastError(); FindClose(hFind); if (dwError != ERROR_NO_MORE_FILES) { errorstream << "GetDirListing: FindNextFile error." << " Error is " << dwError << std::endl; listing.clear(); return listing; } } return listing; } bool CreateDir(const std::string &path) { bool r = CreateDirectory(path.c_str(), NULL); if(r == true) return true; if(GetLastError() == ERROR_ALREADY_EXISTS) return true; return false; } bool PathExists(const std::string &path) { return (GetFileAttributes(path.c_str()) != INVALID_FILE_ATTRIBUTES); } bool IsPathAbsolute(const std::string &path) { return !PathIsRelative(path.c_str()); } bool IsDir(const std::string &path) { DWORD attr = GetFileAttributes(path.c_str()); return (attr != INVALID_FILE_ATTRIBUTES && (attr & FILE_ATTRIBUTE_DIRECTORY)); } bool IsDirDelimiter(char c) { return c == '/' || c == '\\'; } bool RecursiveDelete(const std::string &path) { infostream<<"Recursively deleting \""<<path<<"\""<<std::endl; DWORD attr = GetFileAttributes(path.c_str()); bool is_directory = (attr != INVALID_FILE_ATTRIBUTES && (attr & FILE_ATTRIBUTE_DIRECTORY)); if(!is_directory) { infostream<<"RecursiveDelete: Deleting file "<<path<<std::endl; //bool did = DeleteFile(path.c_str()); bool did = true; if(!did){ errorstream<<"RecursiveDelete: Failed to delete file " <<path<<std::endl; return false; } } else { infostream<<"RecursiveDelete: Deleting content of directory " <<path<<std::endl; std::vector<DirListNode> content = GetDirListing(path); for(size_t i=0; i<content.size(); i++){ const DirListNode &n = content[i]; std::string fullpath = path + DIR_DELIM + n.name; bool did = RecursiveDelete(fullpath); if(!did){ errorstream<<"RecursiveDelete: Failed to recurse to " <<fullpath<<std::endl; return false; } } infostream<<"RecursiveDelete: Deleting directory "<<path<<std::endl; //bool did = RemoveDirectory(path.c_str(); bool did = true; if(!did){ errorstream<<"Failed to recursively delete directory " <<path<<std::endl; return false; } } return true; } bool DeleteSingleFileOrEmptyDirectory(const std::string &path) { DWORD attr = GetFileAttributes(path.c_str()); bool is_directory = (attr != INVALID_FILE_ATTRIBUTES && (attr & FILE_ATTRIBUTE_DIRECTORY)); if(!is_directory) { bool did = DeleteFile(path.c_str()); return did; } else { bool did = RemoveDirectory(path.c_str()); return did; } } std::string TempPath() { DWORD bufsize = GetTempPath(0, NULL); if(bufsize == 0){ errorstream<<"GetTempPath failed, error = "<<GetLastError()<<std::endl; return ""; } std::vector<char> buf(bufsize); DWORD len = GetTempPath(bufsize, &buf[0]); if(len == 0 || len > bufsize){ errorstream<<"GetTempPath failed, error = "<<GetLastError()<<std::endl; return ""; } return std::string(buf.begin(), buf.begin() + len); } #else // POSIX #include <sys/types.h> #include <dirent.h> #include <sys/stat.h> #include <sys/wait.h> #include <unistd.h> std::vector<DirListNode> GetDirListing(const std::string &pathstring) { std::vector<DirListNode> listing; DIR *dp; struct dirent *dirp; if((dp = opendir(pathstring.c_str())) == NULL) { //infostream<<"Error("<<errno<<") opening "<<pathstring<<std::endl; return listing; } while ((dirp = readdir(dp)) != NULL) { // NOTE: // Be very sure to not include '..' in the results, it will // result in an epic failure when deleting stuff. if(strcmp(dirp->d_name, ".") == 0 || strcmp(dirp->d_name, "..") == 0) continue; DirListNode node; node.name = dirp->d_name; int isdir = -1; // -1 means unknown /* POSIX doesn't define d_type member of struct dirent and certain filesystems on glibc/Linux will only return DT_UNKNOWN for the d_type member. Also we don't know whether symlinks are directories or not. */ #ifdef _DIRENT_HAVE_D_TYPE if(dirp->d_type != DT_UNKNOWN && dirp->d_type != DT_LNK) isdir = (dirp->d_type == DT_DIR); #endif /* _DIRENT_HAVE_D_TYPE */ /* Was d_type DT_UNKNOWN, DT_LNK or nonexistent? If so, try stat(). */ if(isdir == -1) { struct stat statbuf; if (stat((pathstring + "/" + node.name).c_str(), &statbuf)) continue; isdir = ((statbuf.st_mode & S_IFDIR) == S_IFDIR); } node.dir = isdir; listing.push_back(node); } closedir(dp); return listing; } bool CreateDir(const std::string &path) { int r = mkdir(path.c_str(), S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH); if(r == 0) { return true; } else { // If already exists, return true if(errno == EEXIST) return true; return false; } } bool PathExists(const std::string &path) { struct stat st; return (stat(path.c_str(),&st) == 0); } bool IsPathAbsolute(const std::string &path) { return path[0] == '/'; } bool IsDir(const std::string &path) { struct stat statbuf; if(stat(path.c_str(), &statbuf)) return false; // Actually error; but certainly not a directory return ((statbuf.st_mode & S_IFDIR) == S_IFDIR); } bool IsDirDelimiter(char c) { return c == '/'; } bool RecursiveDelete(const std::string &path) { /* Execute the 'rm' command directly, by fork() and execve() */ infostream<<"Removing \""<<path<<"\""<<std::endl; //return false; pid_t child_pid = fork(); if(child_pid == 0) { // Child char argv_data[3][10000]; strcpy(argv_data[0], "/bin/rm"); strcpy(argv_data[1], "-rf"); strncpy(argv_data[2], path.c_str(), 10000); char *argv[4]; argv[0] = argv_data[0]; argv[1] = argv_data[1]; argv[2] = argv_data[2]; argv[3] = NULL; verbosestream<<"Executing '"<<argv[0]<<"' '"<<argv[1]<<"' '" <<argv[2]<<"'"<<std::endl; execv(argv[0], argv); // Execv shouldn't return. Failed. _exit(1); } else { // Parent int child_status; pid_t tpid; do{ tpid = wait(&child_status); //if(tpid != child_pid) process_terminated(tpid); }while(tpid != child_pid); return (child_status == 0); } } bool DeleteSingleFileOrEmptyDirectory(const std::string &path) { if(IsDir(path)){ bool did = (rmdir(path.c_str()) == 0); if(!did) errorstream<<"rmdir errno: "<<errno<<": "<<strerror(errno) <<std::endl; return did; } else { bool did = (unlink(path.c_str()) == 0); if(!did) errorstream<<"unlink errno: "<<errno<<": "<<strerror(errno) <<std::endl; return did; } } std::string TempPath() { /* Should the environment variables TMPDIR, TMP and TEMP and the macro P_tmpdir (if defined by stdio.h) be checked before falling back on /tmp? Probably not, because this function is intended to be compatible with lua's os.tmpname which under the default configuration hardcodes mkstemp("/tmp/lua_XXXXXX"). */ #ifdef __ANDROID__ return DIR_DELIM "sdcard" DIR_DELIM PROJECT_NAME DIR_DELIM "tmp"; #else return DIR_DELIM "tmp"; #endif } #endif void GetRecursiveSubPaths(const std::string &path, std::vector<std::string> &dst) { std::vector<DirListNode> content = GetDirListing(path); for(unsigned int i=0; i<content.size(); i++){ const DirListNode &n = content[i]; std::string fullpath = path + DIR_DELIM + n.name; dst.push_back(fullpath); if (n.dir) { GetRecursiveSubPaths(fullpath, dst); } } } bool DeletePaths(const std::vector<std::string> &paths) { bool success = true; // Go backwards to succesfully delete the output of GetRecursiveSubPaths for(int i=paths.size()-1; i>=0; i--){ const std::string &path = paths[i]; bool did = DeleteSingleFileOrEmptyDirectory(path); if(!did){ errorstream<<"Failed to delete "<<path<<std::endl; success = false; } } return success; } bool RecursiveDeleteContent(const std::string &path) { infostream<<"Removing content of \""<<path<<"\""<<std::endl; std::vector<DirListNode> list = GetDirListing(path); for(unsigned int i=0; i<list.size(); i++) { if(trim(list[i].name) == "." || trim(list[i].name) == "..") continue; std::string childpath = path + DIR_DELIM + list[i].name; bool r = RecursiveDelete(childpath); if(r == false) { errorstream<<"Removing \""<<childpath<<"\" failed"<<std::endl; return false; } } return true; } bool CreateAllDirs(const std::string &path) { std::vector<std::string> tocreate; std::string basepath = path; while(!PathExists(basepath)) { tocreate.push_back(basepath); basepath = RemoveLastPathComponent(basepath); if(basepath.empty()) break; } for(int i=tocreate.size()-1;i>=0;i--) if(!CreateDir(tocreate[i])) return false; return true; } bool CopyFileContents(const std::string &source, const 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(const std::string &source, const 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(const std::string &path, const 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(const 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); } std::string AbsolutePath(const std::string &path) { #ifdef _WIN32 char *abs_path = _fullpath(NULL, path.c_str(), MAX_PATH); #else char *abs_path = realpath(path.c_str(), NULL); #endif if (!abs_path) return ""; std::string abs_path_str(abs_path); free(abs_path); return abs_path_str; } const char *GetFilenameFromPath(const char *path) { const char *filename = strrchr(path, DIR_DELIM_CHAR); return filename ? filename + 1 : path; } 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; } } } // namespace fs


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