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

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#include "compat.h"
#include "baselayer.h"
#include "scriptfile.h"
#include "cache1d.h"
#include "crc32.h"
#include "duke3d.h"
#include "grpscan.h"
struct grpfile grpfiles[numgrpfiles] =
{
{ "Duke Nukem 3D", 0xBBC9CE44, 26524524, GAMEDUKE, NULL },
{ "Duke Nukem 3D: Atomic Edition", 0xF514A6AC, 44348015, GAMEDUKE, NULL },
{ "Duke Nukem 3D: Atomic Edition", 0xFD3DCFF1, 44356548, GAMEDUKE, NULL },
{ "Duke Nukem 3D Shareware", 0x983AD923, 11035779, GAMEDUKE, NULL },
{ "Duke Nukem 3D Mac Shareware", 0xC5F71561, 10444391, GAMEDUKE, NULL },
{ "Duke Nukem 3D Mac", 0x00000000, 0, GAMEDUKE, NULL },
{ "NAM", 0x75C1F07B, 43448927, GAMENAM, NULL },
{ "Napalm", 0x3DE1589A, 44365728, GAMENAM, NULL },
{ "WW2GI", 0x907B82BF, 77939508, GAMEWW2, NULL },
};
struct grpfile *foundgrps = NULL;
#define GRPCACHEFILE "grpfiles.cache"
static struct grpcache
{
struct grpcache *next;
char name[BMAX_PATH+1];
int size;
int mtime;
int crcval;
}
*grpcache = NULL, *usedgrpcache = NULL;
static int LoadGroupsCache(void)
{
struct grpcache *fg;
int 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 = Bcalloc(1, sizeof(struct grpcache));
fg->next = grpcache;
grpcache = fg;
strncpy(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;
free(grpcache);
grpcache = fg;
}
}
int ScanGroups(void)
{
CACHE1D_FIND_REC *srch, *sidx;
struct grpcache *fg, *fgg;
struct grpfile *grp;
char *fn;
struct Bstat st;
initprintf("Scanning for GRP files...\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))
{
free(fn);
continue;
} // failed to stat the file
free(fn);
if (fg->size == st.st_size && fg->mtime == st.st_mtime)
{
grp = (struct grpfile *)Bcalloc(1, sizeof(struct grpfile));
grp->name = strdup(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;
}
}
{
int b, fh;
int crcval;
char buf[16*512];
fh = openfrompath(sidx->name, BO_RDONLY|BO_BINARY, BS_IREAD);
if (fh < 0) continue;
if (fstat(fh, &st)) continue;
initprintf(" Checksumming %s...", sidx->name);
crc32init((unsigned int *)&crcval);
do
{
b = read(fh, buf, sizeof(buf));
if (b > 0) crc32block((unsigned int *)&crcval, (unsigned char *)buf, b);
}
while (b == sizeof(buf));
crc32finish((unsigned int *)&crcval);
close(fh);
initprintf(" Done\n");
grp = (struct grpfile *)Bcalloc(1, sizeof(struct grpfile));
grp->name = strdup(sidx->name);
grp->crcval = crcval;
grp->size = st.st_size;
grp->next = foundgrps;
foundgrps = grp;
fgg = (struct grpcache *)Bcalloc(1, sizeof(struct grpcache));
strncpy(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();
if (usedgrpcache)
{
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);
free(fg);
}
fclose(fp);
}
}
return 0;
}
void FreeGroups(void)
{
struct grpfile *fg;
while (foundgrps)
{
fg = foundgrps->next;
free((char*)foundgrps->name);
free(foundgrps);
foundgrps = fg;
}
}