qzdoom/src/pathexpander.cpp

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/*
** pathexpander.cpp
** Utility class for expanding a given path with a range of directories
**
**---------------------------------------------------------------------------
** Copyright 2015 Christoph Oelckers
** All rights reserved.
**
** Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions
** are met:
**
** 1. Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** 2. Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in the
** documentation and/or other materials provided with the distribution.
** 3. The name of the author may not be used to endorse or promote products
** derived from this software without specific prior written permission.
**
** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
**---------------------------------------------------------------------------
**
*/
#include "pathexpander.h"
#include "cmdlib.h"
#include "w_wad.h"
//============================================================================
//
//
//
//============================================================================
static FString BuildPath(const FString &base, const char *name)
{
FString current;
if (base.IsNotEmpty())
{
current = base;
if (current[current.Len() - 1] != '/') current += '/';
}
current += name;
return current;
}
//============================================================================
//
// This is meant to find and open files for reading.
//
//============================================================================
FileReader *PathExpander::openFileReader(const char *name, int *plumpnum)
{
FileReader *fp;
FString current_filename;
if (!name || !(*name))
{
return 0;
}
/* First try the given name */
current_filename = name;
FixPathSeperator(current_filename);
if (openmode != OM_FILE)
{
int lumpnum = Wads.CheckNumForFullName(current_filename);
if (lumpnum >= 0)
{
fp = Wads.ReopenLumpNum(lumpnum);
if (plumpnum) *plumpnum = lumpnum;
return fp;
}
if (openmode == OM_LUMP) // search the path list when not loading the main config
{
for (unsigned int plp = PathList.Size(); plp-- != 0; )
{ /* Try along the path then */
current_filename = BuildPath(PathList[plp], name);
lumpnum = Wads.CheckNumForFullName(current_filename);
if (lumpnum >= 0)
{
fp = Wads.ReopenLumpNum(lumpnum);
if (plumpnum) *plumpnum = lumpnum;
return fp;
}
}
return NULL;
}
}
if (plumpnum) *plumpnum = -1;
fp = new FileReader;
if (fp->Open(current_filename)) return fp;
if (name[0] != '/')
{
for (unsigned int plp = PathList.Size(); plp-- != 0; )
{ /* Try along the path then */
current_filename = BuildPath(PathList[plp], name);
if (fp->Open(current_filename)) return fp;
}
}
delete fp;
/* Nothing could be opened. */
return NULL;
}
/* This adds a directory to the path list */
void PathExpander::addToPathlist(const char *s)
{
FString copy = s;
FixPathSeperator(copy);
PathList.Push(copy);
}
void PathExpander::clearPathlist()
{
PathList.Clear();
}