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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
//-------------------------------------------------------------------------
#include "duke3d.h"
static int32_t rts_numlumps;
static void **rts_lumpcache;
static lumpinfo_t *rts_lumpinfo;
static int32_t RTS_Started = FALSE;
char rts_lumplockbyte[11];
/*
= 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
*/
static int32_t RTS_AddFile(const char *filename)
{
wadinfo_t header;
int32_t i, handle, length, 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
i = kread(handle, &header, sizeof(header));
if (i != sizeof(header) || Bmemcmp(header.identification, "IWAD", 4))
{
initprintf("RTS file \"%s\" too short or doesn't have IWAD id\n", filename);
kclose(handle);
return -1;
}
header.numlumps = B_LITTLE32(header.numlumps);
header.infotableofs = B_LITTLE32(header.infotableofs);
length = header.numlumps*sizeof(filelump_t);
fileinfo = fileinfoo = (filelump_t *)Xmalloc(length);
klseek(handle, header.infotableofs, SEEK_SET);
kread(handle, fileinfo, length);
{
lumpinfo_t *lump_p = (lumpinfo_t *)Xrealloc(
rts_lumpinfo, (rts_numlumps + header.numlumps)*sizeof(lumpinfo_t));
rts_lumpinfo = lump_p;
}
rts_numlumps += header.numlumps;
for (i=startlump; i<rts_numlumps; i++, fileinfo++)
{
lumpinfo_t *lump = &rts_lumpinfo[i];
lump->handle = handle; // NOTE: cache1d-file is not closed!
lump->position = B_LITTLE32(fileinfo->filepos);
lump->size = B_LITTLE32(fileinfo->size);
Bstrncpy(lump->name, fileinfo->name, 8);
}
Bfree(fileinfoo);
return 0;
}
void RTS_Init(const char *filename)
{
// open all the files, load headers, and count lumps
rts_numlumps = 0;
rts_lumpinfo = NULL; // will be realloced as lumps are added
if (RTS_AddFile(filename))
return;
if (rts_numlumps == 0)
return;
rts_lumpcache = (void **)Xcalloc(rts_numlumps, sizeof(rts_lumpcache[0]));
RTS_Started = TRUE;
}
int32_t RTS_IsInitialized(void)
{
return rts_numlumps > 0;
}
#define RTS_BAD_LUMP(lump) ((uint32_t)lump >= (uint32_t)rts_numlumps)
int32_t RTS_SoundLength(int32_t lump)
{
lump++;
return RTS_BAD_LUMP(lump) ? 0 : rts_lumpinfo[lump].size;
}
/* Loads the lump into the given buffer, which must be >= RTS_SoundLength() */
static void RTS_ReadLump(int32_t lump, void *dest)
{
lumpinfo_t *l = &rts_lumpinfo[lump];
klseek(l->handle, l->position, SEEK_SET);
kread(l->handle, dest, l->size);
}
void *RTS_GetSound(int32_t lump)
{
lump++;
if (RTS_BAD_LUMP(lump))
return NULL;
if (rts_lumpcache[lump] == NULL)
{
rts_lumplockbyte[lump] = 200;
allocache((intptr_t *)&rts_lumpcache[lump], 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];
}