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+// Emacs style mode select -*- C++ -*-
+//-----------------------------------------------------------------------------
+//
+// $Id: w_wad.c 4 2005-07-23 16:19:41Z fraggle $
+//
+// Copyright (C) 1993-1996 by id Software, Inc.
+//
+// This source is available for distribution and/or modification
+// only under the terms of the DOOM Source Code License as
+// published by id Software. All rights reserved.
+//
+// The source is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// FITNESS FOR A PARTICULAR PURPOSE. See the DOOM Source Code License
+// for more details.
+//
+// $Log$
+// Revision 1.1 2005/07/23 16:20:39 fraggle
+// Initial revision
+//
+//
+// DESCRIPTION:
+// Handles WAD file header, directory, lump I/O.
+//
+//-----------------------------------------------------------------------------
+
+
+static const char
+rcsid[] = "$Id: w_wad.c 4 2005-07-23 16:19:41Z fraggle $";
+
+
+#ifdef NORMALUNIX
+#include <ctype.h>
+#include <sys/types.h>
+#include <string.h>
+#include <unistd.h>
+#include <malloc.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <alloca.h>
+#define O_BINARY 0
+#endif
+
+#include "doomtype.h"
+#include "m_swap.h"
+#include "i_system.h"
+#include "z_zone.h"
+
+#ifdef __GNUG__
+#pragma implementation "w_wad.h"
+#endif
+#include "w_wad.h"
+
+
+
+
+
+
+//
+// GLOBALS
+//
+
+// Location of each lump on disk.
+lumpinfo_t* lumpinfo;
+int numlumps;
+
+void** lumpcache;
+
+
+#define strcmpi strcasecmp
+
+void strupr (char* s)
+{
+ while (*s) { *s = toupper(*s); s++; }
+}
+
+int filelength (int handle)
+{
+ struct stat fileinfo;
+
+ if (fstat (handle,&fileinfo) == -1)
+ I_Error ("Error fstating");
+
+ return fileinfo.st_size;
+}
+
+
+void
+ExtractFileBase
+( char* path,
+ char* dest )
+{
+ char* src;
+ int length;
+
+ src = path + strlen(path) - 1;
+
+ // back up until a \ or the start
+ while (src != path
+ && *(src-1) != '\\'
+ && *(src-1) != '/')
+ {
+ src--;
+ }
+
+ // copy up to eight characters
+ memset (dest,0,8);
+ length = 0;
+
+ while (*src && *src != '.')
+ {
+ if (++length == 9)
+ I_Error ("Filename base of %s >8 chars",path);
+
+ *dest++ = toupper((int)*src++);
+ }
+}
+
+
+
+
+
+//
+// LUMP BASED ROUTINES.
+//
+
+//
+// W_AddFile
+// All files are optional, but at least one file must be
+// found (PWAD, if all required lumps are present).
+// Files with a .wad extension are wadlink files
+// with multiple lumps.
+// Other files are single lumps with the base filename
+// for the lump name.
+//
+// If filename starts with a tilde, the file is handled
+// specially to allow map reloads.
+// But: the reload feature is a fragile hack...
+
+int reloadlump;
+char* reloadname;
+
+
+void W_AddFile (char *filename)
+{
+ wadinfo_t header;
+ lumpinfo_t* lump_p;
+ unsigned i;
+ int handle;
+ int length;
+ int startlump;
+ filelump_t* fileinfo;
+ filelump_t singleinfo;
+ int storehandle;
+
+ // open the file and add to directory
+
+ // handle reload indicator.
+ if (filename[0] == '~')
+ {
+ filename++;
+ reloadname = filename;
+ reloadlump = numlumps;
+ }
+
+ if ( (handle = open (filename,O_RDONLY | O_BINARY)) == -1)
+ {
+ printf (" couldn't open %s\n",filename);
+ return;
+ }
+
+ printf (" adding %s\n",filename);
+ startlump = numlumps;
+
+ if (strcmpi (filename+strlen(filename)-3 , "wad" ) )
+ {
+ // single lump file
+ fileinfo = &singleinfo;
+ singleinfo.filepos = 0;
+ singleinfo.size = LONG(filelength(handle));
+ ExtractFileBase (filename, singleinfo.name);
+ numlumps++;
+ }
+ else
+ {
+ // WAD file
+ read (handle, &header, sizeof(header));
+ if (strncmp(header.identification,"IWAD",4))
+ {
+ // Homebrew levels?
+ if (strncmp(header.identification,"PWAD",4))
+ {
+ I_Error ("Wad file %s doesn't have IWAD "
+ "or PWAD id\n", filename);
+ }
+
+ // ???modifiedgame = true;
+ }
+ header.numlumps = LONG(header.numlumps);
+ header.infotableofs = LONG(header.infotableofs);
+ length = header.numlumps*sizeof(filelump_t);
+ fileinfo = alloca (length);
+ lseek (handle, header.infotableofs, SEEK_SET);
+ read (handle, fileinfo, length);
+ numlumps += header.numlumps;
+ }
+
+
+ // Fill in lumpinfo
+ lumpinfo = realloc (lumpinfo, numlumps*sizeof(lumpinfo_t));
+
+ if (!lumpinfo)
+ I_Error ("Couldn't realloc lumpinfo");
+
+ lump_p = &lumpinfo[startlump];
+
+ storehandle = reloadname ? -1 : handle;
+
+ for (i=startlump ; i<numlumps ; i++,lump_p++, fileinfo++)
+ {
+ lump_p->handle = storehandle;
+ lump_p->position = LONG(fileinfo->filepos);
+ lump_p->size = LONG(fileinfo->size);
+ strncpy (lump_p->name, fileinfo->name, 8);
+ }
+
+ if (reloadname)
+ close (handle);
+}
+
+
+
+
+//
+// W_Reload
+// Flushes any of the reloadable lumps in memory
+// and reloads the directory.
+//
+void W_Reload (void)
+{
+ wadinfo_t header;
+ int lumpcount;
+ lumpinfo_t* lump_p;
+ unsigned i;
+ int handle;
+ int length;
+ filelump_t* fileinfo;
+
+ if (!reloadname)
+ return;
+
+ if ( (handle = open (reloadname,O_RDONLY | O_BINARY)) == -1)
+ I_Error ("W_Reload: couldn't open %s",reloadname);
+
+ read (handle, &header, sizeof(header));
+ lumpcount = LONG(header.numlumps);
+ header.infotableofs = LONG(header.infotableofs);
+ length = lumpcount*sizeof(filelump_t);
+ fileinfo = alloca (length);
+ lseek (handle, header.infotableofs, SEEK_SET);
+ read (handle, fileinfo, length);
+
+ // Fill in lumpinfo
+ lump_p = &lumpinfo[reloadlump];
+
+ for (i=reloadlump ;
+ i<reloadlump+lumpcount ;
+ i++,lump_p++, fileinfo++)
+ {
+ if (lumpcache[i])
+ Z_Free (lumpcache[i]);
+
+ lump_p->position = LONG(fileinfo->filepos);
+ lump_p->size = LONG(fileinfo->size);
+ }
+
+ close (handle);
+}
+
+
+
+//
+// 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
+// does override all earlier ones.
+//
+void W_InitMultipleFiles (char** filenames)
+{
+ int size;
+
+ // open all the files, load headers, and count lumps
+ numlumps = 0;
+
+ // will be realloced as lumps are added
+ lumpinfo = malloc(1);
+
+ for ( ; *filenames ; filenames++)
+ W_AddFile (*filenames);
+
+ if (!numlumps)
+ I_Error ("W_InitFiles: no files found");
+
+ // set up caching
+ size = numlumps * sizeof(*lumpcache);
+ lumpcache = malloc (size);
+
+ if (!lumpcache)
+ I_Error ("Couldn't allocate lumpcache");
+
+ memset (lumpcache,0, size);
+}
+
+
+
+
+//
+// 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)
+{
+ union {
+ char s[9];
+ int x[2];
+
+ } name8;
+
+ int v1;
+ int v2;
+ lumpinfo_t* lump_p;
+
+ // make the name into two integers for easy compares
+ strncpy (name8.s,name,8);
+
+ // in case the name was a fill 8 chars
+ name8.s[8] = 0;
+
+ // case insensitive
+ strupr (name8.s);
+
+ v1 = name8.x[0];
+ v2 = name8.x[1];
+
+
+ // scan backwards so patch lump files take precedence
+ lump_p = lumpinfo + numlumps;
+
+ while (lump_p-- != lumpinfo)
+ {
+ if ( *(int *)lump_p->name == v1
+ && *(int *)&lump_p->name[4] == v2)
+ {
+ return lump_p - lumpinfo;
+ }
+ }
+
+ // TFB. Not found.
+ 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)
+ I_Error ("W_GetNumForName: %s not found!", name);
+
+ return i;
+}
+
+
+//
+// W_LumpLength
+// Returns the buffer size needed to load the given lump.
+//
+int W_LumpLength (int lump)
+{
+ if (lump >= numlumps)
+ I_Error ("W_LumpLength: %i >= numlumps",lump);
+
+ return lumpinfo[lump].size;
+}
+
+
+
+//
+// W_ReadLump
+// Loads the lump into the given buffer,
+// which must be >= W_LumpLength().
+//
+void
+W_ReadLump
+( int lump,
+ void* dest )
+{
+ int c;
+ lumpinfo_t* l;
+ int handle;
+
+ if (lump >= numlumps)
+ I_Error ("W_ReadLump: %i >= numlumps",lump);
+
+ l = lumpinfo+lump;
+
+ // ??? I_BeginRead ();
+
+ if (l->handle == -1)
+ {
+ // reloadable file, so use open / read / close
+ if ( (handle = open (reloadname,O_RDONLY | O_BINARY)) == -1)
+ I_Error ("W_ReadLump: couldn't open %s",reloadname);
+ }
+ else
+ handle = l->handle;
+
+ lseek (handle, l->position, SEEK_SET);
+ c = read (handle, dest, l->size);
+
+ if (c < l->size)
+ I_Error ("W_ReadLump: only read %i of %i on lump %i",
+ c,l->size,lump);
+
+ if (l->handle == -1)
+ close (handle);
+
+ // ??? I_EndRead ();
+}
+
+
+
+
+//
+// W_CacheLumpNum
+//
+void*
+W_CacheLumpNum
+( int lump,
+ int tag )
+{
+ byte* ptr;
+
+ if ((unsigned)lump >= numlumps)
+ I_Error ("W_CacheLumpNum: %i >= numlumps",lump);
+
+ if (!lumpcache[lump])
+ {
+ // read the lump in
+
+ //printf ("cache miss on lump %i\n",lump);
+ ptr = Z_Malloc (W_LumpLength (lump), tag, &lumpcache[lump]);
+ W_ReadLump (lump, lumpcache[lump]);
+ }
+ else
+ {
+ //printf ("cache hit on lump %i\n",lump);
+ Z_ChangeTag (lumpcache[lump],tag);
+ }
+
+ return lumpcache[lump];
+}
+
+
+
+//
+// W_CacheLumpName
+//
+void*
+W_CacheLumpName
+( char* name,
+ int tag )
+{
+ return W_CacheLumpNum (W_GetNumForName(name), tag);
+}
+
+
+//
+// W_Profile
+//
+int info[2500][10];
+int profilecount;
+
+void W_Profile (void)
+{
+ int i;
+ memblock_t* block;
+ void* ptr;
+ char ch;
+ FILE* f;
+ int j;
+ char name[9];
+
+
+ for (i=0 ; i<numlumps ; i++)
+ {
+ ptr = lumpcache[i];
+ if (!ptr)
+ {
+ ch = ' ';
+ continue;
+ }
+ else
+ {
+ block = (memblock_t *) ( (byte *)ptr - sizeof(memblock_t));
+ if (block->tag < PU_PURGELEVEL)
+ ch = 'S';
+ else
+ ch = 'P';
+ }
+ info[i][profilecount] = ch;
+ }
+ profilecount++;
+
+ f = fopen ("waddump.txt","w");
+ name[8] = 0;
+
+ for (i=0 ; i<numlumps ; i++)
+ {
+ memcpy (name,lumpinfo[i].name,8);
+
+ for (j=0 ; j<8 ; j++)
+ if (!name[j])
+ break;
+
+ for ( ; j<8 ; j++)
+ name[j] = ' ';
+
+ fprintf (f,"%s ",name);
+
+ for (j=0 ; j<profilecount ; j++)
+ fprintf (f," %c",info[i][j]);
+
+ fprintf (f,"\n");
+ }
+ fclose (f);
+}
+
+
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