qzdoom/src/p_openmap.cpp

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/*
** p_openmap.cpp
**
** creates the data structures needed to load a map from the resource files.
**
**---------------------------------------------------------------------------
** Copyright 2005-2018 Christoph Oelckers
** Copyright 2005-2016 Randy Heit
** 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 "p_setup.h"
#include "cmdlib.h"
#include "w_wad.h"
#include "md5.h"
#include "g_levellocals.h"
#include "cmdlib.h"
#define IWAD_ID MAKE_ID('I','W','A','D')
#define PWAD_ID MAKE_ID('P','W','A','D')
inline bool P_IsBuildMap(MapData *map)
{
return false;
}
//===========================================================================
//
// GetMapIndex
//
// Gets the type of map lump or -1 if invalid or -2 if required and not found.
//
//===========================================================================
struct checkstruct
{
const char lumpname[9];
bool required;
};
static int GetMapIndex(const char *mapname, int lastindex, const char *lumpname, bool needrequired)
{
static const checkstruct check[] =
{
{"", true},
{"THINGS", true},
{"LINEDEFS", true},
{"SIDEDEFS", true},
{"VERTEXES", true},
{"SEGS", false},
{"SSECTORS", false},
{"NODES", false},
{"SECTORS", true},
{"REJECT", false},
{"BLOCKMAP", false},
{"BEHAVIOR", false},
//{"SCRIPTS", false},
};
if (lumpname==NULL) lumpname="";
for(size_t i=lastindex+1;i<countof(check);i++)
{
if (!strnicmp(lumpname, check[i].lumpname, 8))
return (int)i;
if (check[i].required)
{
if (needrequired)
{
I_Error("'%s' not found in %s\n", check[i].lumpname, mapname);
}
return -2;
}
}
return -1; // End of map reached
}
//===========================================================================
//
// Opens a map for reading
//
//===========================================================================
MapData *P_OpenMapData(const char * mapname, bool justcheck)
{
MapData * map = new MapData;
FileReader * wadReader = nullptr;
bool externalfile = !strnicmp(mapname, "file:", 5);
if (externalfile)
{
mapname += 5;
if (!FileExists(mapname))
{
delete map;
return NULL;
}
map->resource = FResourceFile::OpenResourceFile(mapname, true);
wadReader = map->resource->GetReader();
}
else
{
FString fmt;
int lump_wad;
int lump_map;
int lump_name = -1;
// Check for both *.wad and *.map in order to load Build maps
// as well. The higher one will take precedence.
// Names with more than 8 characters will only be checked as .wad and .map.
if (strlen(mapname) <= 8) lump_name = fileSystem.CheckNumForName(mapname);
fmt.Format("maps/%s.wad", mapname);
lump_wad = fileSystem.CheckNumForFullName(fmt);
fmt.Format("maps/%s.map", mapname);
lump_map = fileSystem.CheckNumForFullName(fmt);
if (lump_name > lump_wad && lump_name > lump_map && lump_name != -1)
{
int lumpfile = fileSystem.GetLumpFile(lump_name);
int nextfile = fileSystem.GetLumpFile(lump_name+1);
map->lumpnum = lump_name;
if (lumpfile != nextfile)
{
// The following lump is from a different file so whatever this is,
// it is not a multi-lump Doom level so let's assume it is a Build map.
map->MapLumps[0].Reader = fileSystem.ReopenLumpReader(lump_name);
if (!P_IsBuildMap(map))
{
delete map;
return NULL;
}
return map;
}
// This case can only happen if the lump is inside a real WAD file.
// As such any special handling for other types of lumps is skipped.
map->MapLumps[0].Reader = fileSystem.ReopenLumpReader(lump_name);
strncpy(map->MapLumps[0].Name, fileSystem.GetLumpFullName(lump_name), 8);
map->InWad = true;
int index = 0;
if (stricmp(fileSystem.GetLumpFullName(lump_name + 1), "TEXTMAP") != 0)
{
for(int i = 1;; i++)
{
// Since levels must be stored in WADs they can't really have full
// names and for any valid level lump this always returns the short name.
const char * lumpname = fileSystem.GetLumpFullName(lump_name + i);
try
{
index = GetMapIndex(mapname, index, lumpname, !justcheck);
}
catch(...)
{
delete map;
throw;
}
if (index == -2)
{
delete map;
return NULL;
}
if (index == ML_BEHAVIOR) map->HasBehavior = true;
// The next lump is not part of this map anymore
if (index < 0) break;
map->MapLumps[index].Reader = fileSystem.ReopenLumpReader(lump_name + i);
strncpy(map->MapLumps[index].Name, lumpname, 8);
}
}
else
{
map->isText = true;
map->MapLumps[1].Reader = fileSystem.ReopenLumpReader(lump_name + 1);
for(int i = 2;; i++)
{
const char * lumpname = fileSystem.GetLumpFullName(lump_name + i);
if (lumpname == NULL)
{
I_Error("Invalid map definition for %s", mapname);
}
else if (!stricmp(lumpname, "ZNODES"))
{
index = ML_GLZNODES;
}
else if (!stricmp(lumpname, "BLOCKMAP"))
{
// there is no real point in creating a blockmap but let's use it anyway
index = ML_BLOCKMAP;
}
else if (!stricmp(lumpname, "REJECT"))
{
index = ML_REJECT;
}
else if (!stricmp(lumpname, "DIALOGUE"))
{
index = ML_CONVERSATION;
}
else if (!stricmp(lumpname, "BEHAVIOR"))
{
index = ML_BEHAVIOR;
map->HasBehavior = true;
}
else if (!stricmp(lumpname, "ENDMAP"))
{
break;
}
else continue;
map->MapLumps[index].Reader = fileSystem.ReopenLumpReader(lump_name + i);
strncpy(map->MapLumps[index].Name, lumpname, 8);
}
}
return map;
}
else
{
if (lump_map > lump_wad)
{
lump_wad = lump_map;
}
if (lump_wad == -1)
{
delete map;
return NULL;
}
map->lumpnum = lump_wad;
auto reader = fileSystem.ReopenLumpReader(lump_wad);
map->resource = FResourceFile::OpenResourceFile(fileSystem.GetLumpFullName(lump_wad), reader, true);
wadReader = map->resource->GetReader();
}
}
uint32_t id;
// Although we're using the resource system, we still want to be sure we're
// reading from a wad file.
wadReader->Seek(0, FileReader::SeekSet);
wadReader->Read(&id, sizeof(id));
if (id == IWAD_ID || id == PWAD_ID)
{
char maplabel[9]="";
int index=0;
map->MapLumps[0].Reader = map->resource->GetLump(0)->NewReader();
uppercopy(map->MapLumps[0].Name, map->resource->GetLump(0)->getName());
for(uint32_t i = 1; i < map->resource->LumpCount(); i++)
{
const char* lumpname = map->resource->GetLump(i)->getName();
if (i == 1 && !strnicmp(lumpname, "TEXTMAP", 8))
{
map->isText = true;
map->MapLumps[ML_TEXTMAP].Reader = map->resource->GetLump(i)->NewReader();
strncpy(map->MapLumps[ML_TEXTMAP].Name, lumpname, 8);
for(int i = 2;; i++)
{
lumpname = map->resource->GetLump(i)->getName();
if (!strnicmp(lumpname, "ZNODES",8))
{
index = ML_GLZNODES;
}
else if (!strnicmp(lumpname, "BLOCKMAP",8))
{
// there is no real point in creating a blockmap but let's use it anyway
index = ML_BLOCKMAP;
}
else if (!strnicmp(lumpname, "REJECT",8))
{
index = ML_REJECT;
}
else if (!strnicmp(lumpname, "DIALOGUE",8))
{
index = ML_CONVERSATION;
}
else if (!strnicmp(lumpname, "BEHAVIOR",8))
{
index = ML_BEHAVIOR;
map->HasBehavior = true;
}
else if (!strnicmp(lumpname, "ENDMAP",8))
{
return map;
}
else continue;
map->MapLumps[index].Reader = map->resource->GetLump(i)->NewReader();
strncpy(map->MapLumps[index].Name, lumpname, 8);
}
}
if (i>0)
{
try
{
index = GetMapIndex(maplabel, index, lumpname, !justcheck);
}
catch(...)
{
delete map;
throw;
}
if (index == -2)
{
delete map;
return NULL;
}
if (index == ML_BEHAVIOR) map->HasBehavior = true;
// The next lump is not part of this map anymore
if (index < 0) break;
}
else
{
strncpy(maplabel, lumpname, 8);
maplabel[8]=0;
}
map->MapLumps[index].Reader = map->resource->GetLump(i)->NewReader();
strncpy(map->MapLumps[index].Name, lumpname, 8);
}
}
else
{
// This is a Build map and not subject to WAD consistency checks.
//map->MapLumps[0].Size = wadReader->GetLength();
if (!P_IsBuildMap(map))
{
delete map;
return NULL;
}
}
return map;
}
bool P_CheckMapData(const char *mapname)
{
MapData *mapd = P_OpenMapData(mapname, true);
if (mapd == NULL) return false;
delete mapd;
return true;
}
//===========================================================================
//
// MapData :: GetChecksum
//
// Hashes a map based on its header, THINGS, LINEDEFS, SIDEDEFS, SECTORS,
// and BEHAVIOR lumps. Node-builder generated lumps are not included.
//
//===========================================================================
void MapData::GetChecksum(uint8_t cksum[16])
{
MD5Context md5;
if (isText)
{
md5Update(Reader(ML_TEXTMAP), md5, Size(ML_TEXTMAP));
}
else
{
md5Update(Reader(ML_LABEL), md5, Size(ML_LABEL));
md5Update(Reader(ML_THINGS), md5, Size(ML_THINGS));
md5Update(Reader(ML_LINEDEFS), md5, Size(ML_LINEDEFS));
md5Update(Reader(ML_SIDEDEFS), md5, Size(ML_SIDEDEFS));
md5Update(Reader(ML_SECTORS), md5, Size(ML_SECTORS));
}
if (HasBehavior)
{
md5Update(Reader(ML_BEHAVIOR), md5, Size(ML_BEHAVIOR));
}
md5.Final(cksum);
}