raze-gles/polymer/eduke32/source/rts.c

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//-------------------------------------------------------------------------
/*
Copyright (C) 2010 EDuke32 developers and contributors
This file is part of EDuke32.
EDuke32 is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License version 2
as published by the Free Software Foundation.
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.
*/
//-------------------------------------------------------------------------
#include "duke3d.h"
//=============
// STATICS
//=============
int32_t rts_numlumps;
static void **rts_lumpcache;
static lumpinfo_t *rts_lumpinfo; // location of each lump on disk
static int32_t RTS_Started = FALSE;
char rts_lumplockbyte[11];
int32_t IntelLong(int32_t l)
{
#if B_BIG_ENDIAN != 0
int32_t t = ((l & 0x00ff00ffl) << 8) | ((l & 0xff00ff00l) >> 8);
return ((t & 0x0000ffffl) << 16) | ((t & 0xffff0000l) >> 16);
#else
return l;
#endif
}
/*
============================================================================
LUMP BASED ROUTINES
============================================================================
*/
/*
====================
=
= RTS_AddFile
=
= All files are optional, but at least one file must be found
= Files with a .rts extension are wadlink files with multiple lumps
= Other files are single lumps with the base filename for the lump name
=
====================
*/
int32_t RTS_AddFile(const char *filename)
{
wadinfo_t header;
lumpinfo_t *lump_p;
uint32_t i;
int32_t handle, length;
int32_t startlump;
filelump_t *fileinfo, *fileinfoo;
//
// read the entire file in
// FIXME: shared opens
handle = kopen4loadfrommod((char *)filename, 0);
if (handle < 0)
{
initprintf("RTS file \"%s\" was not found\n",filename);
return -1;
}
startlump = rts_numlumps;
// WAD file
// initprintf(" Adding \"%s\".\n",filename);
kread(handle, &header, sizeof(header));
if (strncmp(header.identification,"IWAD",4))
{
initprintf("RTS file \"%s\" doesn't have IWAD id\n",filename);
kclose(handle);
return -1;
}
header.numlumps = IntelLong(header.numlumps);
header.infotableofs = IntelLong(header.infotableofs);
length = header.numlumps*sizeof(filelump_t);
fileinfo = fileinfoo = (filelump_t *)Bmalloc(length);
if (!fileinfo)
{
initprintf("RTS file could not allocate header info\n");
kclose(handle);
return -1;
}
klseek(handle, header.infotableofs, SEEK_SET);
kread(handle, fileinfo, length);
//
// Fill in lumpinfo
//
lump_p = Brealloc(rts_lumpinfo, (rts_numlumps + header.numlumps)*sizeof(lumpinfo_t));
if (!lump_p)
{
kclose(handle);
return -1;
}
rts_lumpinfo = lump_p;
rts_numlumps += header.numlumps;
lump_p = &rts_lumpinfo[startlump];
for (i=startlump ; i<(uint32_t)rts_numlumps ; i++,lump_p++, fileinfo++)
{
lump_p->handle = handle;
lump_p->position = IntelLong(fileinfo->filepos);
lump_p->size = IntelLong(fileinfo->size);
Bstrncpy(lump_p->name, fileinfo->name, 8);
}
Bfree(fileinfoo);
return 0;
}
/*
====================
=
= RTS_Init
=
= Files with a .rts extension are idlink files with multiple lumps
=
====================
*/
void RTS_Init(const char *filename)
{
int32_t length;
//
// open all the files, load headers, and count lumps
//
rts_numlumps = 0;
rts_lumpinfo = NULL; // will be realloced as lumps are added
// initprintf("RTS Manager Started.\n");
if (RTS_AddFile(filename)) return;
if (!rts_numlumps) return;
//
// set up caching
//
length = (rts_numlumps) * sizeof(*rts_lumpcache);
rts_lumpcache = Bmalloc(length);
memset(rts_lumpcache,0,length);
RTS_Started = TRUE;
}
/*
====================
=
= RTS_NumSounds
=
====================
*/
int32_t RTS_NumSounds(void)
{
return rts_numlumps-1;
}
/*
====================
=
= RTS_SoundLength
=
= Returns the buffer size needed to load the given lump
=
====================
*/
int32_t RTS_SoundLength(int32_t lump)
{
lump++;
if (lump >= rts_numlumps)
{
initprintf("RTS_SoundLength: %i >= numlumps",lump);
RTS_Started = FALSE;
rts_numlumps = 0;
return 0;
}
return rts_lumpinfo[lump].size;
}
/*
====================
=
= RTS_GetSoundName
=
====================
*/
const char *RTS_GetSoundName(int32_t i)
{
i++;
if (i>=rts_numlumps)
{
initprintf("RTS_GetSoundName: %i >= numlumps",i);
RTS_Started = FALSE;
rts_numlumps = 0;
return 0;
}
return &(rts_lumpinfo[i].name[0]);
}
/*
====================
=
= RTS_ReadLump
=
= Loads the lump into the given buffer, which must be >= RTS_SoundLength()
=
====================
*/
void RTS_ReadLump(int32_t lump, void *dest)
{
lumpinfo_t *l;
if (lump >= rts_numlumps)
{
initprintf("RTS_ReadLump: %i >= numlumps",lump);
RTS_Started = FALSE;
rts_numlumps = 0;
return;
}
if (lump < 0)
{
initprintf("RTS_ReadLump: %i < 0",lump);
RTS_Started = FALSE;
rts_numlumps = 0;
return;
}
l = rts_lumpinfo+lump;
klseek(l->handle, l->position, SEEK_SET);
kread(l->handle,dest,l->size);
}
/*
====================
=
= RTS_GetSound
=
====================
*/
void *RTS_GetSound(int32_t lump)
{
lump++;
if ((uint32_t)lump >= (uint32_t)rts_numlumps)
{
initprintf("RTS_GetSound: %i >= %i\n",lump,rts_numlumps);
RTS_Started = FALSE;
rts_numlumps = 0;
return 0;
}
if (rts_lumpcache[lump] == NULL)
{
rts_lumplockbyte[lump] = 200;
allocache((intptr_t *)&rts_lumpcache[lump],(int32_t)RTS_SoundLength(lump-1),&rts_lumplockbyte[lump]); // JBF 20030910: char * => int32_t *
RTS_ReadLump(lump, rts_lumpcache[lump]);
}
else
{
if (rts_lumplockbyte[lump] < 200)
rts_lumplockbyte[lump] = 200;
else
rts_lumplockbyte[lump]++;
}
return rts_lumpcache[lump];
}