mirror of
https://github.com/ZDoom/Raze.git
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278 lines
7.5 KiB
C++
278 lines
7.5 KiB
C++
/*
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** findfile.cpp
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** Warpper around the native directory scanning API
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**
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**---------------------------------------------------------------------------
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** Copyright 1998-2016 Randy Heit
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** Copyright 2005-2020 Christoph Oelckers
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**
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** Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions
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** are met:
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**
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** 1. Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** 2. Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in the
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** documentation and/or other materials provided with the distribution.
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** 3. The name of the author may not be used to endorse or promote products
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** derived from this software without specific prior written permission.
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**
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** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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**---------------------------------------------------------------------------
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**
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*/
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#include "findfile.h"
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#include "zstring.h"
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#include "cmdlib.h"
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#include "printf.h"
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#include "configfile.h"
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#include "i_system.h"
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#include "fs_findfile.h"
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#ifdef __unix__
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#include <sys/stat.h>
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#endif // __unix__
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//==========================================================================
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//
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// D_AddFile
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//
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//==========================================================================
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bool D_AddFile(std::vector<std::string>& wadfiles, const char* file, bool check, int position, FConfigFile* config)
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{
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if (file == nullptr || *file == '\0')
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{
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return false;
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}
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#ifdef __unix__
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// Confirm file exists in filesystem.
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struct stat info;
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bool found = stat(file, &info) == 0;
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FString fullpath = file;
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if (!found)
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{
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// File not found, so split file into path and filename so we can enumerate the path for the file.
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auto lastindex = fullpath.LastIndexOf("/");
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FString basepath = fullpath.Left(lastindex);
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FString filename = fullpath.Right(fullpath.Len() - lastindex - 1);
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// Proceed only if locating a file (i.e. `file` isn't a path to just a directory.)
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if (filename.IsNotEmpty())
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{
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DIR *d;
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struct dirent *dir;
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d = opendir(basepath.GetChars());
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if (d)
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{
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while ((dir = readdir(d)) != NULL)
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{
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if (filename.CompareNoCase(dir->d_name) == 0)
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{
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found = true;
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filename = dir->d_name;
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fullpath = basepath << "/" << filename;
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file = fullpath.GetChars();
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break;
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}
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}
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closedir(d);
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if (!found)
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{
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Printf("Can't find file '%s' in '%s'\n", filename.GetChars(), basepath.GetChars());
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return false;
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}
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}
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else
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{
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Printf("Can't open directory '%s'\n", basepath.GetChars());
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return false;
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}
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}
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}
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#endif
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if (check && !DirEntryExists(file))
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{
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const char* f = BaseFileSearch(file, ".wad", false, config);
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if (f == nullptr)
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{
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Printf("Can't find '%s'\n", file);
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return false;
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}
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file = f;
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}
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std::string f = file;
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for (auto& c : f) if (c == '\\') c = '/';
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if (position == -1) wadfiles.push_back(f);
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else wadfiles.insert(wadfiles.begin() + position, f);
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return true;
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}
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//==========================================================================
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//
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// D_AddWildFile
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//
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//==========================================================================
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void D_AddWildFile(std::vector<std::string>& wadfiles, const char* value, const char *extension, FConfigFile* config)
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{
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if (value == nullptr || *value == '\0')
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{
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return;
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}
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const char* wadfile = BaseFileSearch(value, extension, false, config);
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if (wadfile != nullptr)
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{
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D_AddFile(wadfiles, wadfile, true, -1, config);
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}
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else
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{
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// Try pattern matching
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FileSys::FileList list;
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auto path = ExtractFilePath(value);
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auto name = ExtractFileBase(value, true);
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if (path.IsEmpty()) path = ".";
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if (FileSys::ScanDirectory(list, path, name, true))
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{
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for(auto& entry : list)
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{
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D_AddFile(wadfiles, entry.FilePath.c_str(), true, -1, config);
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}
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}
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}
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}
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//==========================================================================
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//
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// D_AddConfigWads
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//
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// Adds all files in the specified config file section.
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//
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//==========================================================================
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void D_AddConfigFiles(std::vector<std::string>& wadfiles, const char* section, const char* extension, FConfigFile *config)
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{
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if (config && config->SetSection(section))
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{
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const char* key;
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const char* value;
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FConfigFile::Position pos;
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while (config->NextInSection(key, value))
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{
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if (stricmp(key, "Path") == 0)
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{
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// D_AddWildFile resets config's position, so remember it
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config->GetPosition(pos);
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D_AddWildFile(wadfiles, ExpandEnvVars(value), extension, config);
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// Reset config's position to get next wad
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config->SetPosition(pos);
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}
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}
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}
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}
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//==========================================================================
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//
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// D_AddDirectory
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//
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// Add all .wad files in a directory. Does not descend into subdirectories.
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//
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//==========================================================================
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void D_AddDirectory(std::vector<std::string>& wadfiles, const char* dir, const char *filespec, FConfigFile* config)
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{
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FileSys::FileList list;
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if (FileSys::ScanDirectory(list, dir, "*.wad", true))
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{
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for (auto& entry : list)
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{
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if (!entry.isDirectory)
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{
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D_AddFile(wadfiles, entry.FilePath.c_str(), true, -1, config);
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}
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}
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}
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}
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//==========================================================================
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//
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// BaseFileSearch
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//
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// If a file does not exist at <file>, looks for it in the directories
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// specified in the config file. Returns the path to the file, if found,
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// or nullptr if it could not be found.
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//
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//==========================================================================
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static FString BFSwad; // outside the function to evade C++'s insane rules for constructing static variables inside functions.
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const char* BaseFileSearch(const char* file, const char* ext, bool lookfirstinprogdir, FConfigFile* config)
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{
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if (file == nullptr || *file == '\0')
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{
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return nullptr;
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}
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if (lookfirstinprogdir)
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{
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BFSwad.Format("%s%s%s", progdir.GetChars(), progdir.Back() == '/' ? "" : "/", file);
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if (DirEntryExists(BFSwad))
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{
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return BFSwad.GetChars();
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}
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}
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if (DirEntryExists(file))
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{
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BFSwad.Format("%s", file);
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return BFSwad.GetChars();
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}
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if (config != nullptr && config->SetSection("FileSearch.Directories"))
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{
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const char* key;
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const char* value;
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while (config->NextInSection(key, value))
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{
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if (stricmp(key, "Path") == 0)
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{
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FString dir;
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dir = NicePath(value);
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if (dir.IsNotEmpty())
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{
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BFSwad.Format("%s%s%s", dir.GetChars(), dir.Back() == '/' ? "" : "/", file);
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if (DirEntryExists(BFSwad))
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{
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return BFSwad.GetChars();
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}
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}
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}
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}
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}
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// Retry, this time with a default extension
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if (ext != nullptr)
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{
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FString tmp = file;
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DefaultExtension(tmp, ext);
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return BaseFileSearch(tmp, nullptr, lookfirstinprogdir, config);
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}
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return nullptr;
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}
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