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#include <u.h>
#include <libc.h>
#include <thread.h>
#include "dat.h"
#include "fns.h"
#include <mp.h>
#include <libsec.h>
int
Hfmt(Fmt *f)
{
uchar *p, *e;
for(p = va_arg(f->args, uchar*), e = p + HASHSZ; p != e; p++)
if(fmtprint(f, "%.2x", *p) < 0)
return -1;
return 0;
}
int
fhash(int fd, uchar p1[], uchar p2[], uchar h[])
{
DigestState *ds;
uchar buf[BUFSZ];
int n;
ds = nil;
memset(h, 0, HASHSZ);
if(memcmp(p1, p2, HASHSZ) > 0){
ds = sha1(p2, HASHSZ, nil, ds);
sha1(p1, HASHSZ, nil, ds);
} else {
ds = sha1(p1, HASHSZ, nil, ds);
sha1(p2, HASHSZ, nil, ds);
}
while((n = read(fd, buf, BUFSZ)) > 0)
sha1(buf, n, nil, ds);
sha1(buf, 0, h, ds);
return 0;
}
int
hex2hash(char *s, uchar *h)
{
uchar *b;
int n;
b = h;
memset(h, 0, HASHSZ);
n = HASHSZ*2;
while(*s && n > 0){
if(*s >= '0' && *s <= '9')
*h |= *s - '0';
else if(*s >= 'a' && *s <= 'f')
*h |= 10 + *s - 'a';
else if(*s >= 'A' && *s <= 'F')
*h |= 10 + *s - 'A';
else
break;
if(n-- & 1)
h++;
else
*h <<= 4;
s++;
}
return h - b;
}
uvlong
hash2qid(uchar *h)
{
uvlong v;
int i;
v = 0;
for(i=0; i<8; i++)
v |= (uvlong)h[i]<<(56-8*i);
return v;
}
int
readhash(char *path, char *name, uchar hash[])
{
char buf[MAXPATH], *p;
int n;
snprint(buf, sizeof(buf), "%s/%s", path, name);
readfile(buf, buf, sizeof(buf));
if(p = strchr(buf, '.'))
p++;
else
p = buf;
n = hex2hash(p, hash);
if(n != HASHSZ)
return -1;
return 0;
}
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