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raze/polymer/eduke32/source/grpscan.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 "compat.h"
#include "baselayer.h"
#include "scriptfile.h"
#include "cache1d.h"
#include "crc32.h"
#include "duke3d.h"
#include "common_game.h"
#include "grpscan.h"
struct grpfile grpfiles[NUMGRPFILES] =
{
{ "Duke Nukem 3D", DUKE13_CRC, 26524524, GAMEFLAG_DUKE, 0, NULL, NULL },
{ "Duke Nukem 3D (South Korean Censored)", DUKEKR_CRC, 26385383, GAMEFLAG_DUKE, 0, NULL, NULL },
{ "Duke Nukem 3D: Atomic Edition", DUKE15_CRC, 44356548, GAMEFLAG_DUKE, 0, NULL, NULL },
{ "Duke Nukem 3D: Plutonium Pak", DUKEPP_CRC, 44348015, GAMEFLAG_DUKE, 0, NULL, NULL },
{ "Duke Nukem 3D Shareware", DUKESW_CRC, 11035779, GAMEFLAG_DUKE, 0, NULL, NULL },
{ "Duke Nukem 3D Mac Demo", DUKEMD_CRC, 10444391, GAMEFLAG_DUKE, 0, NULL, NULL },
{ "Duke it out in D.C.", DUKEDC_CRC, 8410183 , GAMEFLAG_DUKE|GAMEFLAG_ADDON, DUKE15_CRC, NULL, NULL },
{ "Duke Caribbean: Life's a Beach", DUKECB_CRC, 22213819, GAMEFLAG_DUKE|GAMEFLAG_ADDON, DUKE15_CRC, NULL, NULL },
{ "Duke: Nuclear Winter", DUKENW_CRC, 16169365, GAMEFLAG_DUKE|GAMEFLAG_ADDON, DUKE15_CRC, "nwinter.con", NULL },
{ "NAM", NAM_CRC, 43448927, GAMEFLAG_NAM, 0, NULL, NULL },
{ "NAPALM", NAPALM_CRC, 44365728, GAMEFLAG_NAM|GAMEFLAG_NAPALM, 0, NULL, NULL },
{ "WWII GI", WW2GI_CRC, 77939508, GAMEFLAG_WW2GI|GAMEFLAG_NAM, 0, NULL, NULL },
};
struct grpfile *foundgrps = NULL;
#define GRPCACHEFILE "grpfiles.cache"
static struct grpcache
{
struct grpcache *next;
int32_t size;
int32_t mtime;
int32_t crcval;
char name[BMAX_PATH];
}
*grpcache = NULL, *usedgrpcache = NULL;
static int32_t LoadGroupsCache(void)
{
struct grpcache *fg;
int32_t fsize, fmtime, fcrcval;
char *fname;
scriptfile *script;
script = scriptfile_fromfile(GRPCACHEFILE);
if (!script) return -1;
while (!scriptfile_eof(script))
{
if (scriptfile_getstring(script, &fname)) break; // filename
if (scriptfile_getnumber(script, &fsize)) break; // filesize
if (scriptfile_getnumber(script, &fmtime)) break; // modification time
if (scriptfile_getnumber(script, &fcrcval)) break; // crc checksum
fg = (struct grpcache *)Bcalloc(1, sizeof(struct grpcache));
fg->next = grpcache;
grpcache = fg;
Bstrncpy(fg->name, fname, BMAX_PATH);
fg->size = fsize;
fg->mtime = fmtime;
fg->crcval = fcrcval;
}
scriptfile_close(script);
return 0;
}
static void FreeGroupsCache(void)
{
struct grpcache *fg;
while (grpcache)
{
fg = grpcache->next;
Bfree(grpcache);
grpcache = fg;
}
}
void RemoveGroup(int32_t crcval)
{
struct grpfile *grp;
for (grp = foundgrps; grp; grp=grp->next)
{
if (grp->crcval == crcval)
{
if (grp == foundgrps)
foundgrps = grp->next;
else
{
struct grpfile *fg;
for (fg = foundgrps; fg; fg=fg->next)
{
if (fg->next == grp)
{
fg->next = grp->next;
break;
}
}
}
Bfree((char *)grp->name);
Bfree(grp);
RemoveGroup(crcval);
break;
}
}
}
struct grpfile * FindGroup(int32_t crcval)
{
struct grpfile *grp;
for (grp = foundgrps; grp; grp=grp->next)
{
if (grp->crcval == crcval)
return grp;
}
return NULL;
}
int32_t ScanGroups(void)
{
CACHE1D_FIND_REC *srch, *sidx;
struct grpcache *fg, *fgg;
struct grpfile *grp;
char *fn;
struct Bstat st;
#define BUFFER_SIZE (1024 * 1024 * 8)
uint8_t *buf = (uint8_t *)Bmalloc(BUFFER_SIZE);
if (!buf)
{
initprintf("Error allocating %d byte buffer to scan GRPs!\n", BUFFER_SIZE);
return 0;
}
initprintf("Searching for game data...\n");
LoadGroupsCache();
srch = klistpath("/", "*.grp", CACHE1D_FIND_FILE);
for (sidx = srch; sidx; sidx = sidx->next)
{
for (fg = grpcache; fg; fg = fg->next)
{
if (!Bstrcmp(fg->name, sidx->name)) break;
}
if (fg)
{
if (findfrompath(sidx->name, &fn)) continue; // failed to resolve the filename
if (Bstat(fn, &st))
{
Bfree(fn);
continue;
} // failed to stat the file
Bfree(fn);
if (fg->size == st.st_size && fg->mtime == st.st_mtime)
{
grp = (struct grpfile *)Bcalloc(1, sizeof(struct grpfile));
grp->name = Bstrdup(sidx->name);
grp->crcval = fg->crcval;
grp->size = fg->size;
grp->next = foundgrps;
foundgrps = grp;
fgg = (struct grpcache *)Bcalloc(1, sizeof(struct grpcache));
strcpy(fgg->name, fg->name);
fgg->size = fg->size;
fgg->mtime = fg->mtime;
fgg->crcval = fg->crcval;
fgg->next = usedgrpcache;
usedgrpcache = fgg;
continue;
}
}
{
int32_t b, fh;
int32_t crcval;
fh = openfrompath(sidx->name, BO_RDONLY|BO_BINARY, BS_IREAD);
if (fh < 0) continue;
if (Bfstat(fh, &st)) continue;
initprintf(" Checksumming %s...", sidx->name);
crc32init((uint32_t *)&crcval);
do
{
b = read(fh, buf, BUFFER_SIZE);
if (b > 0) crc32block((uint32_t *)&crcval, (uint8_t *)buf, b);
}
while (b == BUFFER_SIZE);
crc32finish((uint32_t *)&crcval);
close(fh);
initprintf(" Done\n");
grp = (struct grpfile *)Bcalloc(1, sizeof(struct grpfile));
grp->name = Bstrdup(sidx->name);
grp->crcval = crcval;
grp->size = st.st_size;
grp->next = foundgrps;
foundgrps = grp;
fgg = (struct grpcache *)Bcalloc(1, sizeof(struct grpcache));
Bstrncpy(fgg->name, sidx->name, BMAX_PATH);
fgg->size = st.st_size;
fgg->mtime = st.st_mtime;
fgg->crcval = crcval;
fgg->next = usedgrpcache;
usedgrpcache = fgg;
}
}
klistfree(srch);
FreeGroupsCache();
for (grp = foundgrps; grp; /*grp=grp->next*/)
{
int32_t i;
for (i = 0; i<NUMGRPFILES; i++) if (grp->crcval == grpfiles[i].crcval) break;
if (i == NUMGRPFILES) { grp=grp->next; continue; } // unrecognised grp file
if (grpfiles[i].dependency)
{
//initprintf("found grp with dep\n");
for (grp = foundgrps; grp; grp=grp->next)
if (grp->crcval == grpfiles[i].dependency) break;
if (grp == NULL || grp->crcval != grpfiles[i].dependency) // couldn't find dependency
{
//initprintf("removing %s\n", grp->name);
RemoveGroup(grpfiles[i].crcval);
grp = foundgrps;
continue;
}
}
grp=grp->next;
}
if (usedgrpcache)
{
int32_t i = 0;
FILE *fp;
fp = fopen(GRPCACHEFILE, "wt");
if (fp)
{
for (fg = usedgrpcache; fg; fg=fgg)
{
fgg = fg->next;
fprintf(fp, "\"%s\" %d %d %d\n", fg->name, fg->size, fg->mtime, fg->crcval);
Bfree(fg);
i++;
}
fclose(fp);
}
// initprintf("Found %d recognized GRP %s.\n",i,i>1?"files":"file");
Bfree(buf);
return 0;
}
initprintf("Found no recognized game data!\n");
Bfree(buf);
return 0;
}
void FreeGroups(void)
{
struct grpfile *fg;
while (foundgrps)
{
fg = foundgrps->next;
Bfree((char *)foundgrps->name);
Bfree(foundgrps);
foundgrps = fg;
}
}
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