mirror of https://github.com/ZDoom/gzdoom.git
135 lines
3.8 KiB
C++
135 lines
3.8 KiB
C++
/*
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** pathexpander.cpp
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** Utility class for expanding a given path with a range of directories
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**
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**---------------------------------------------------------------------------
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** Copyright 2015 Christoph Oelckers
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** All rights reserved.
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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 "pathexpander.h"
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#include "cmdlib.h"
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#include "w_wad.h"
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//============================================================================
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//
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//
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//
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//============================================================================
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static FString BuildPath(const FString &base, const char *name)
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{
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FString current;
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if (base.IsNotEmpty())
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{
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current = base;
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if (current[current.Len() - 1] != '/') current += '/';
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}
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current += name;
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return current;
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}
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//============================================================================
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//
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// This is meant to find and open files for reading.
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//
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//============================================================================
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FileReader *PathExpander::openFileReader(const char *name, int *plumpnum)
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{
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FileReader *fp;
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FString current_filename;
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if (!name || !(*name))
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{
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return 0;
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}
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/* First try the given name */
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current_filename = name;
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FixPathSeperator(current_filename);
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if (openmode != OM_FILE)
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{
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int lumpnum = Wads.CheckNumForFullName(current_filename);
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if (lumpnum >= 0)
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{
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fp = Wads.ReopenLumpNum(lumpnum);
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if (plumpnum) *plumpnum = lumpnum;
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return fp;
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}
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if (openmode == OM_LUMP) // search the path list when not loading the main config
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{
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for (unsigned int plp = PathList.Size(); plp-- != 0; )
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{ /* Try along the path then */
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current_filename = BuildPath(PathList[plp], name);
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lumpnum = Wads.CheckNumForFullName(current_filename);
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if (lumpnum >= 0)
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{
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fp = Wads.ReopenLumpNum(lumpnum);
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if (plumpnum) *plumpnum = lumpnum;
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return fp;
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}
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}
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return NULL;
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}
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}
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if (plumpnum) *plumpnum = -1;
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fp = new FileReader;
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if (fp->Open(current_filename)) return fp;
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if (name[0] != '/')
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{
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for (unsigned int plp = PathList.Size(); plp-- != 0; )
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{ /* Try along the path then */
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current_filename = BuildPath(PathList[plp], name);
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if (fp->Open(current_filename)) return fp;
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}
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}
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delete fp;
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/* Nothing could be opened. */
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return NULL;
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}
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/* This adds a directory to the path list */
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void PathExpander::addToPathlist(const char *s)
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{
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FString copy = s;
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FixPathSeperator(copy);
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PathList.Push(copy);
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}
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void PathExpander::clearPathlist()
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{
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PathList.Clear();
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}
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