161 lines
4.4 KiB
C++
161 lines
4.4 KiB
C++
/* Copyright (c) 2010 Wildfire Games
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "precompiled.h"
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#include "file_system.h"
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#include <vector>
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#include <algorithm>
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#include <string>
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#include "lib/path_util.h"
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#include "lib/wchar.h" // wstring_from_utf8
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#include "lib/posix/posix_filesystem.h"
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struct DirDeleter
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{
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void operator()(WDIR* osDir) const
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{
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const int ret = wclosedir(osDir);
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debug_assert(ret == 0);
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}
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};
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// is name "." or ".."?
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static bool IsDummyDirectory(const std::wstring& name)
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{
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if(name[0] != '.')
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return false;
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return (name[1] == '\0' || (name[1] == '.' && name[2] == '\0'));
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}
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LibError GetDirectoryEntries(const fs::wpath& path, FileInfos* files, DirectoryNames* subdirectoryNames)
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{
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// open directory
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errno = 0;
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WDIR* pDir = wopendir(path.string().c_str());
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if(!pDir)
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return LibError_from_errno(false);
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shared_ptr<WDIR> osDir(pDir, DirDeleter());
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for(;;)
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{
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errno = 0;
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struct wdirent* osEnt = wreaddir(osDir.get());
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if(!osEnt)
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{
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// no error, just no more entries to return
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if(!errno)
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return INFO::OK;
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return LibError_from_errno();
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}
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const std::wstring name(osEnt->d_name);
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RETURN_ERR(path_component_validate(name.c_str()));
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// get file information (mode, size, mtime)
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struct stat s;
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#if OS_WIN
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// .. return wdirent directly (much faster than calling stat).
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RETURN_ERR(wreaddir_stat_np(osDir.get(), &s));
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#else
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// .. call regular stat().
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errno = 0;
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const fs::wpath pathname(path/name);
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if(wstat(pathname.string().c_str(), &s) != 0)
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return LibError_from_errno();
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#endif
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if(files && S_ISREG(s.st_mode))
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files->push_back(FileInfo(name, s.st_size, s.st_mtime));
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else if(subdirectoryNames && S_ISDIR(s.st_mode) && !IsDummyDirectory(name))
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subdirectoryNames->push_back(name);
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}
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}
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LibError GetFileInfo(const fs::wpath& pathname, FileInfo* pfileInfo)
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{
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errno = 0;
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struct stat s;
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memset(&s, 0, sizeof(s));
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if(wstat(pathname.string().c_str(), &s) != 0)
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return LibError_from_errno();
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*pfileInfo = FileInfo(pathname.leaf(), s.st_size, s.st_mtime);
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return INFO::OK;
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}
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LibError CreateDirectories(const fs::wpath& path, mode_t mode)
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{
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if(path.empty() || fs::exists(path))
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{
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if(!path.empty() && !fs::is_directory(path)) // encountered a file
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WARN_RETURN(ERR::FAIL);
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return INFO::OK;
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}
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// If we were passed a path ending with '/', strip the '/' now so that
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// we can consistently use branch_path to find parent directory names
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if (path.leaf() == L".")
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return CreateDirectories(path.branch_path(), mode);
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RETURN_ERR(CreateDirectories(path.branch_path(), mode));
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errno = 0;
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if(wmkdir(path.string().c_str(), mode) != 0)
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return LibError_from_errno();
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return INFO::OK;
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}
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LibError DeleteDirectory(const fs::wpath& path)
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{
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// note: we have to recursively empty the directory before it can
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// be deleted (required by Windows and POSIX rmdir()).
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FileInfos files; DirectoryNames subdirectoryNames;
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RETURN_ERR(GetDirectoryEntries(path, &files, &subdirectoryNames));
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// delete files
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for(size_t i = 0; i < files.size(); i++)
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{
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const fs::wpath pathname(path/files[i].Name());
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errno = 0;
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if(wunlink(pathname.string().c_str()) != 0)
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return LibError_from_errno();
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}
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// recurse over subdirectoryNames
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for(size_t i = 0; i < subdirectoryNames.size(); i++)
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RETURN_ERR(DeleteDirectory(path/subdirectoryNames[i]));
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errno = 0;
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if(wrmdir(path.string().c_str()) != 0)
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return LibError_from_errno();
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return INFO::OK;
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}
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