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utils/xwad/wadlib.cpp

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//
+//=============================================================================//
+
+// wad2lib.c
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <ctype.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+//#include <sys/file.h>
+#include <stdarg.h>
+
+#ifdef NeXT
+#include <libc.h>
+#endif
+#include "goldsrc_standin.h"
+#include "wadlib.h"
+
+/*
+============================================================================
+
+							WAD READING
+
+============================================================================
+*/
+
+
+lumpinfo_t		*lumpinfo;		// location of each lump on disk
+int				numlumps;
+
+wadinfo_t		header;
+FILE			*wadhandle;
+
+
+/*
+====================
+W_OpenWad
+====================
+*/
+void W_OpenWad (const char *filename)
+{
+	lumpinfo_t		*lump_p;
+	int	i;
+	int				length;
+
+//
+// open the file and add to directory
+//	
+	wadhandle = SafeOpenRead ((char*)filename);
+	SafeRead (wadhandle, &header, sizeof(header));
+
+	if (strncmp(header.identification,"WAD2",4) &&
+		strncmp(header.identification, "WAD3", 4))
+		Error ("Wad file %s doesn't have WAD2/WAD3 id\n",filename);
+		
+	header.numlumps = LittleLong(header.numlumps);
+	header.infotableofs = LittleLong(header.infotableofs);
+
+	numlumps = header.numlumps;
+
+	length = numlumps*sizeof(lumpinfo_t);
+	lumpinfo = (lumpinfo_t*)malloc (length);
+	lump_p = lumpinfo;
+	
+	fseek (wadhandle, header.infotableofs, SEEK_SET);
+	SafeRead (wadhandle, lumpinfo, length);
+
+//
+// Fill in lumpinfo
+//
+	
+	for (i=0 ; i<numlumps ; i++,lump_p++)
+	{
+		lump_p->filepos = LittleLong(lump_p->filepos);
+		lump_p->size = LittleLong(lump_p->size);
+	}
+}
+
+
+void CleanupName (char *in, char *out)
+{
+	int		i;
+	
+	for (i=0 ; i<sizeof( ((lumpinfo_t *)0)->name ) ; i++ )
+	{
+		if (!in[i])
+			break;
+			
+		out[i] = toupper(in[i]);
+	}
+	
+	for ( ; i<sizeof( ((lumpinfo_t *)0)->name ); i++ )
+		out[i] = 0;
+}
+
+
+/*
+====================
+W_CheckNumForName
+
+Returns -1 if name not found
+====================
+*/
+int	W_CheckNumForName (char *name)
+{
+	char	cleanname[16];
+	int		v1,v2, v3, v4;
+	int		i;
+	lumpinfo_t	*lump_p;
+	
+	CleanupName (name, cleanname);
+	
+// make the name into four integers for easy compares
+
+	v1 = *(int *)cleanname;
+	v2 = *(int *)&cleanname[4];
+	v3 = *(int *)&cleanname[8];
+	v4 = *(int *)&cleanname[12];
+
+// find it
+
+	lump_p = lumpinfo;
+	for (i=0 ; i<numlumps ; i++, lump_p++)
+	{
+		if ( *(int *)lump_p->name == v1
+		&& *(int *)&lump_p->name[4] == v2
+		&& *(int *)&lump_p->name[8] == v3
+		&& *(int *)&lump_p->name[12] == v4)
+			return i;
+	}
+
+	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_ReadLumpNum
+
+Loads the lump into the given buffer, which must be >= W_LumpLength()
+====================
+*/
+void W_ReadLumpNum (int lump, void *dest)
+{
+	lumpinfo_t	*l;
+	
+	if (lump >= numlumps)
+		Error ("W_ReadLump: %i >= numlumps",lump);
+	l = lumpinfo+lump;
+	
+	fseek (wadhandle, l->filepos, SEEK_SET);
+	SafeRead (wadhandle, dest, l->size);
+}
+
+
+
+/*
+====================
+W_LoadLumpNum
+====================
+*/
+void	*W_LoadLumpNum (int lump)
+{
+	void	*buf;
+	
+	if ((unsigned)lump >= (unsigned)numlumps)
+		Error ("W_CacheLumpNum: %i >= numlumps",lump);
+		
+	buf = malloc (W_LumpLength (lump));
+	W_ReadLumpNum (lump, buf);
+	
+	return buf;
+}
+
+
+/*
+====================
+W_LoadLumpName
+====================
+*/
+void	*W_LoadLumpName (char *name)
+{
+	return W_LoadLumpNum (W_GetNumForName(name));
+}
+
+
+/*
+===============================================================================
+
+						WAD CREATION
+
+===============================================================================
+*/
+
+FILE		*outwad;
+
+lumpinfo_t	outinfo[4096];
+int			outlumps;
+
+short	(*wadshort) (short l);
+int		(*wadlong) (int l);
+
+/*
+===============
+NewWad
+===============
+*/
+
+void NewWad (char *pathname, qboolean bigendien)
+{
+	outwad = SafeOpenWrite (pathname);
+	fseek (outwad, sizeof(wadinfo_t), SEEK_SET);
+	memset (outinfo, 0, sizeof(outinfo));
+	
+	if (bigendien)
+	{
+		wadshort = BigShort;
+		wadlong = BigLong;
+	}
+	else
+	{
+		wadshort = LittleShort;
+		wadlong = LittleLong;
+	}
+	
+	outlumps = 0;
+}
+
+
+/*
+===============
+AddLump
+===============
+*/
+
+void	AddLump (char *name, void *buffer, int length, int type, int compress)
+{
+	lumpinfo_t	*info;
+	int			ofs;
+	
+	info = &outinfo[outlumps];
+	outlumps++;
+
+	memset (info,0,sizeof(info));
+	
+	strcpy (info->name, name);
+	strupr (info->name);
+	
+	ofs = ftell(outwad);
+	info->filepos = wadlong(ofs);
+	info->size = info->disksize = wadlong(length);
+	info->type = type;
+	info->compression = compress;
+	
+// FIXME: do compression
+
+	SafeWrite (outwad, buffer, length);
+}
+
+
+/*
+===============
+WriteWad
+===============
+*/
+
+void WriteWad (int wad3)
+{
+	wadinfo_t	header;
+	int			ofs;
+	
+// write the lumpingo
+	ofs = ftell(outwad);
+
+	SafeWrite (outwad, outinfo, outlumps*sizeof(lumpinfo_t) );
+		
+// write the header
+
+// a program will be able to tell the ednieness of a wad by the id
+	header.identification[0] = 'W';
+	header.identification[1] = 'A';
+	header.identification[2] = 'D';
+	header.identification[3] = wad3 ? '3' : '2';
+	
+	header.numlumps = wadlong(outlumps);
+	header.infotableofs = wadlong(ofs);
+		
+	fseek (outwad, 0, SEEK_SET);
+	SafeWrite (outwad, &header, sizeof(header));
+	fclose (outwad);
+}
+
+