ref: 786100272f9b96f4aed462b790d8eb79a4828c17
dir: /rott/w_wad.c/
/*
Copyright (C) 1994-1995 Apogee Software, Ltd.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
// W_wad.c
#include <alloca.h>
#include <stdio.h>
#include <string.h>
#include <fcntl.h>
#include <sys/stat.h>
#include "rt_def.h"
#include "rt_util.h"
#include "_w_wad.h"
#include "w_wad.h"
#include "z_zone.h"
#include "isr.h"
#include "develop.h"
#include "rt_crc.h"
#include "rt_main.h"
//=============
// GLOBALS
//=============
int numlumps;
void **lumpcache;
//=============
// STATICS
//=============
static lumpinfo_t *lumpinfo; // location of each lump on disk
#if (DATACORRUPTIONTEST == 1)
static byte *lumpcheck;
#endif
/*
============================================================================
LUMP BASED ROUTINES
============================================================================
*/
/*
====================
=
= W_AddFile
=
= All files are optional, but at least one file must be found
= Files with a .wad extension are wadlink files with multiple lumps
= Other files are single lumps with the base filename for the lump name
=
====================
*/
void W_AddFile (char *_filename)
{
wadinfo_t header;
lumpinfo_t *lump_p;
unsigned i;
int handle, length;
int startlump;
filelump_t *fileinfo, singleinfo;
char filename[MAX_PATH];
char buf[MAX_PATH+100];//bna++
strncpy(filename, _filename, sizeof (filename));
filename[sizeof (filename) - 1] = '\0';
FixFilePath(filename);
//bna section start
if (access (filename, 0) != 0) {
strcpy (buf,"Error, Could not find User file '");
strcat (buf,filename);
strcat (buf,"', ignoring file");
printf("%s", buf);
}
//bna section end
//
// read the entire file in
// FIXME: shared opens
if ( (handle = open (filename,O_RDONLY | O_BINARY)) == -1)
return;
startlump = numlumps;
if ( (strcmpi (filename+strlen(filename)-3, "wad" ) ) &&
(strcmpi (filename+strlen(filename)-3, "rts" ) ) )
{
// single lump file
if (!quiet)
printf(" Adding single file %s.\n",filename);
fileinfo = &singleinfo;
singleinfo.filepos = 0;
singleinfo.size = LONG(filelength(handle));
ExtractFileBase (filename, singleinfo.name);
numlumps++;
}
else
{
// WAD file
if (!quiet)
printf(" Adding %s.\n",filename);
read (handle, &header, sizeof(header));
if (strncmp(header.identification,"IWAD",4))
Error ("Wad file %s doesn't have IWAD id\n",filename);
header.numlumps = IntelLong(LONG(header.numlumps));
header.infotableofs = IntelLong(LONG(header.infotableofs));
length = header.numlumps*sizeof(filelump_t);
fileinfo = alloca (length);
if (!fileinfo)
Error ("Wad file could not allocate header info on stack");
lseek (handle, header.infotableofs, SEEK_SET);
read (handle, fileinfo, length);
numlumps += header.numlumps;
}
//
// Fill in lumpinfo
//
Z_Realloc((void **)&lumpinfo,numlumps*sizeof(lumpinfo_t));
// lumpinfo = realloc (lumpinfo, numlumps*sizeof(lumpinfo_t));
// if (!lumpinfo)
// Error("W_AddFile: Could not realloc %ld bytes",numlumps*sizeof(lumpinfo_t));
lump_p = &lumpinfo[startlump];
for (i=startlump ; i<(unsigned int)numlumps ; i++,lump_p++, fileinfo++)
{
fileinfo->filepos = IntelLong(LONG(fileinfo->filepos));
fileinfo->size = IntelLong(LONG(fileinfo->size));
lump_p->handle = handle;
lump_p->position = LONG(fileinfo->filepos);
lump_p->size = LONG(fileinfo->size);
strncpy (lump_p->name, fileinfo->name, 8);
}
}
/*
====================
=
= W_CheckWADIntegrity
=
====================
*/
void W_CheckWADIntegrity ( void )
{
// CRC disabled because it's not very useful these days
}
/*
====================
=
= W_InitMultipleFiles
=
= Pass a null terminated list of files to use.
=
= All files are optional, but at least one file must be found
=
= Files with a .wad extension are idlink files with multiple lumps
=
= Other files are single lumps with the base filename for the lump name
=
= Lump names can appear multiple times. The name searcher looks backwards,
= so a later file can override an earlier one.
=
====================
*/
void W_InitMultipleFiles (char **filenames)
{
//
// open all the files, load headers, and count lumps
//
numlumps = 0;
lumpinfo = SafeMalloc(5); // will be realloced as lumps are added
for ( ; *filenames ; filenames++)
W_AddFile (*filenames);
if (!numlumps)
Error ("W_InitFiles: no files found");
//
// set up caching
//
lumpcache = calloc (numlumps, sizeof(*lumpcache));
if (!lumpcache)
Error("W_InitFiles: lumpcache malloc failed size=%d\n",numlumps<<2);
if (!quiet)
printf("W_Wad: Wad Manager Started NUMLUMPS=%ld\n",(long int)numlumps);
#if (DATACORRUPTIONTEST == 1)
lumpcheck=SafeMalloc(numlumps);
memset(lumpcheck,255,numlumps);
#endif
W_CheckWADIntegrity ();
}
/*
====================
=
= W_InitFile
=
= Just initialize from a single file
=
====================
*/
void W_InitFile (char *filename)
{
char *names[2];
names[0] = filename;
names[1] = NULL;
W_InitMultipleFiles (names);
}
/*
====================
=
= W_NumLumps
=
====================
*/
int W_NumLumps (void)
{
return numlumps;
}
/*
====================
=
= W_CheckNumForName
=
= Returns -1 if name not found
=
====================
*/
int W_CheckNumForName (char *name)
{
char name8[9];
int v1,v2;
lumpinfo_t *lump_p;
lumpinfo_t *endlump;
// make the name into two integers for easy compares
strncpy (name8,name,8);
name8[8] = 0; // in case the name was a fill 8 chars
strupr (name8); // case insensitive
v1 = *(int *)name8;
v2 = *(int *)&name8[4];
// scan backwards so patch lump files take precedence
lump_p = lumpinfo;
endlump = lumpinfo + numlumps;
while (lump_p != endlump)
{
if ( *(int *)lump_p->name == v1 && *(int *)&lump_p->name[4] == v2)
return lump_p - lumpinfo;
lump_p++;
}
return -1;
}
/*
====================
=
= W_GetNumForName
=
= Calls W_CheckNumForName, but bombs out if not found
=
====================
*/
int W_GetNumForName (char *name)
{
int i;
i = W_CheckNumForName (name);
if (i != -1)
return i;
Error ("W_GetNumForName: %s not found!",name);
return -1;
}
/*
====================
=
= W_LumpLength
=
= Returns the buffer size needed to load the given lump
=
====================
*/
int W_LumpLength (int lump)
{
if (lump >= numlumps)
Error ("W_LumpLength: %i >= numlumps",lump);
return lumpinfo[lump].size;
}
/*
====================
=
= W_GetNameForNum
=
====================
*/
char * W_GetNameForNum (int i)
{
if (i>=numlumps)
Error ("W_GetNameForNum: %i >= numlumps",i);
return &(lumpinfo[i].name[0]);
}
/*
====================
=
= W_ReadLump
=
= Loads the lump into the given buffer, which must be >= W_LumpLength()
=
====================
*/
int readinglump;
byte * lumpdest;
void W_ReadLump (int lump, void *dest)
{
int c;
lumpinfo_t *l;
readinglump=lump;
lumpdest=dest;
if (lump >= numlumps)
Error ("W_ReadLump: %i >= numlumps",lump);
if (lump < 0)
Error ("W_ReadLump: %i < 0",lump);
l = lumpinfo+lump;
lseek (l->handle, l->position, SEEK_SET);
c = read (l->handle, dest, l->size);
if (c < l->size)
Error ("W_ReadLump: only read %i of %i on lump %i",c,l->size,lump);
}
/*
====================
=
= W_WriteLump
=
= Writes the lump into the given buffer, which must be >= W_LumpLength()
=
====================
*/
void W_WriteLump (int lump, void *src)
{
int c;
lumpinfo_t *l;
if (lump >= numlumps)
Error ("W_WriteLump: %i >= numlumps",lump);
if (lump < 0)
Error ("W_WriteLump: %i < 0",lump);
l = lumpinfo+lump;
lseek (l->handle, l->position, SEEK_SET);
c = write (l->handle, src, l->size);
if (c < l->size)
Error ("W_WriteLump: only wrote %i of %i on lump %i",c,l->size,lump);
}
/*
====================
=
= W_CacheLumpNum
=
====================
*/
void *W_CacheLumpNum (int lump, int tag, converter_t converter, int numrec)
{
if (lump >= (int)numlumps)
Error ("W_CacheLumpNum: %i >= numlumps",lump);
else if (lump < 0)
Error ("W_CacheLumpNum: %i < 0 Taglevel: %i",lump,tag);
if (!lumpcache[lump])
{
// read the lump in
#if (PRECACHETEST == 1)
char str[9];
strncpy(&str[0],W_GetNameForNum(lump),8);
str[8]=0;
SoftError("Lump #%d, %s cached at %ld tics size=%ld tag=%ld\n",lump,str,ticcount,W_LumpLength (lump),tag);
if (W_LumpLength(lump)==0)
SoftError("Caching in zero length lump #%d, %s cached at %ld tics size=%ld tag=%ld\n",lump,str,ticcount,W_LumpLength (lump),tag);
#endif
#if (DATACORRUPTIONTEST == 1)
{
int length;
*(lumpcheck+lump)=CHECKPERIOD;
length=W_LumpLength(lump);
Z_Malloc (length+sizeof(word), tag, &lumpcache[lump]);
W_ReadLump (lump, lumpcache[lump]);
Debug("Invoking endian converter on %p, %i records.\n", lumpcache[lump], numrec);
converter(lumpcache[lump], numrec);
*( (word *) ((byte *)lumpcache[lump]+length) ) = CalculateCRC (lumpcache[lump], length);
}
#else
Z_Malloc (W_LumpLength (lump), tag, &lumpcache[lump]);
W_ReadLump (lump, lumpcache[lump]);
Debug("Invoking endian converter on %p, %i records\n", lumpcache[lump], numrec);
converter(lumpcache[lump], numrec);
#endif
}
else
{
#if (DATACORRUPTIONTEST == 1)
if (*(lumpcheck+lump)==255)
Error("Tried using lump%ld before reading it in\n",lump);
(*(lumpcheck+lump))--;
if (*(lumpcheck+lump)==0)
{
word storedcrc;
word crc;
int length;
*(lumpcheck+lump)=CHECKPERIOD;
length=W_LumpLength(lump);
storedcrc = *( (word *) ((byte *)lumpcache[lump]+length) );
crc = CalculateCRC (lumpcache[lump], length);
if (crc!=storedcrc)
Error("Data corruption lump=%ld\n",lump);
}
#endif
Z_ChangeTag (lumpcache[lump],tag);
}
return lumpcache[lump];
}
/*
====================
=
= W_CacheLumpName
=
====================
*/
void *W_CacheLumpName (char *name, int tag, converter_t converter, int numrec)
{
return W_CacheLumpNum (W_GetNumForName(name), tag, converter, numrec);
}