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WebSVN – planix.SVN – Blame – /os/branches/feature_fixcpp/sys/src/cmd/venti/srv/findscore.c – Rev 2

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#include "stdinc.h"
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#include "dat.h"
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#include "fns.h"
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enum
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{
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	ClumpChunks	= 32*1024
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};
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static int	verbose;
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int
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clumpinfoeq(ClumpInfo *c, ClumpInfo *d)
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{
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	return c->type == d->type
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		&& c->size == d->size
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		&& c->uncsize == d->uncsize
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		&& scorecmp(c->score, d->score)==0;
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}
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int
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findscore(Arena *arena, uchar *score)
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{
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	IEntry ie;
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	ClumpInfo *ci, *cis;
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	u64int a;
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	u32int clump;
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	int i, n, found;
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//ZZZ remove fprint?
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	if(arena->memstats.clumps)
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		fprint(2, "reading directory for arena=%s with %d entries\n",
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			arena->name, arena->memstats.clumps);
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	cis = MKN(ClumpInfo, ClumpChunks);
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	found = 0;
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	a = 0;
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	memset(&ie, 0, sizeof(IEntry));
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	for(clump = 0; clump < arena->memstats.clumps; clump += n){
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		n = ClumpChunks;
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		if(n > arena->memstats.clumps - clump)
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			n = arena->memstats.clumps - clump;
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		if(readclumpinfos(arena, clump, cis, n) != n){
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			seterr(EOk, "arena directory read failed: %r");
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			break;
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		}
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		for(i = 0; i < n; i++){
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			ci = &cis[i];
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			if(scorecmp(score, ci->score)==0){
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				fprint(2, "found at clump=%d with type=%d size=%d csize=%d position=%lld\n",
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					clump + i, ci->type, ci->uncsize, ci->size, a);
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				found++;
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			}
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			a += ci->size + ClumpSize;
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		}
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	}
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	free(cis);
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	return found;
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}
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void
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usage(void)
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{
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	fprint(2, "usage: findscore [-v] arenafile score\n");
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	threadexitsall(0);
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}
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void
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threadmain(int argc, char *argv[])
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{
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	ArenaPart *ap;
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	Part *part;
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	char *file;
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	u8int score[VtScoreSize];
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	int i, found;
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	ventifmtinstall();
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	ARGBEGIN{
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	case 'v':
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		verbose++;
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		break;
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	default:
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		usage();
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		break;
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	}ARGEND
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	readonly = 1;
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	if(argc != 2)
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		usage();
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	file = argv[0];
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	if(strscore(argv[1], score) < 0)
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		sysfatal("bad score %s", argv[1]);
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	part = initpart(file, OREAD|ODIRECT);
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	if(part == nil)
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		sysfatal("can't open partition %s: %r", file);
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	ap = initarenapart(part);
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	if(ap == nil)
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		sysfatal("can't initialize arena partition in %s: %r", file);
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	if(verbose > 1){
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		printarenapart(2, ap);
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		fprint(2, "\n");
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	}
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	initdcache(8 * MaxDiskBlock);
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	found = 0;
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	for(i = 0; i < ap->narenas; i++)
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		found += findscore(ap->arenas[i], score);
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	print("found %d occurrences of %V\n", found, score);
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	if(verbose > 1)
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		printstats();
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	threadexitsall(0);
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}