add representation of hash, decode dependencies

laumann

Sep 10, 2022, 7:44 PM

YG4DZB3AW3Z3LB5CFBZZ4ORJOLZFN3G4CA2YTAMSUOQX3USVNVEAC

Dependencies

[2] 2C2EF2GK move blake3 files to vendor/blake3
[3] LCEKN25G change: parse authors
[4] VKLGQREY change: add base32 decode, initial deconstruction of hashed
[5] Y26WT3ZF change: decode message, description and timestamp
[6] Q7TKZCJP Add initial support for reading the offsets from a (fixed) change
[*] PEUS54XQ
[*] OBKF6SII change: decompress the hashed section too
[*] B3XLVPNC Add ani.c and initial Makefile
[*] X36ICMJN Initial import for blake3

Change contents

file addition: hash.h (----------)

[8.1]

#ifndef HASH_H
#define HASH_H

#define HASH_NONE 0
#define HASH_BLAKE3 1

#define BLAKE3_BYTES 32

struct hash {
uint8_t variant; /* One of the HASH_* defines */
uint8_t bytes[BLAKE3_BYTES];
};

struct hash_list {
size_t len;
struct hash *entries;
};

void hash_print(struct hash *);

#endif
file addition: hash.c (----------)

[8.1]

#include <stdlib.h>
#include <stdint.h>
#include <stdio.h>

#include "hash.h"

void
hash_print(struct hash *hash)
{
int i;
switch (hash->variant) {
case HASH_NONE:
printf("(none)\n");
break;
case HASH_BLAKE3:
for (i = 0; i < BLAKE3_BYTES; i++)
printf("%02x", hash->bytes[i]);
printf("\n");
break;
default:
abort();
}
}
replacement in change.h at line 71

[4.568]→[4.568:661](∅→∅)

void *dependencies; /* array of hashes */
void *extra_known; /* another array of hashes */

[4.568]

[4.661]

struct hash_list dependencies; /* array of hashes */
struct hash_list extra_known; /* another array of hashes */
edit in change.c at line 13

[2.285700]

[4.1192]

#include "hash.h"
edit in change.c at line 250

[3.1176]

[3.1176]

}

/* Decode dependencies (Vec<Hash>) */
len = bincode_getu64(&binstat);
hashed.dependencies.len = len;
hashed.dependencies.entries = xmalloc(sizeof(struct hash) * len);
edit in change.c at line 258

[3.1177]

[3.1177]

printf("[[dependencies]]\n");
for (i = 0; i < hashed.dependencies.len; i++) {
hashed.dependencies.entries[i].variant = bincode_getu32(&binstat);
switch (hashed.dependencies.entries[i].variant) {
case HASH_BLAKE3:
memcpy(hashed.dependencies.entries[i].bytes, binstat.buf, BLAKE3_BYTES);
binstat.buf += BLAKE3_BYTES;
binstat.avail -= BLAKE3_BYTES;
break;
case HASH_NONE:
/* Do nothing, no bytes to consume */
break;
default:
abort();
}
hash_print(&hashed.dependencies.entries[i]);
edit in change.c at line 275

[3.1180]→[3.1180:1227](∅→∅)

dump_buf("buf2", binstat.buf, binstat.avail);
edit in change.c at line 276

[4.1640]

[4.1640]

/* Decode extra_known (Vec<Hash> again) */
len = bincode_getu64(&binstat);
hashed.extra_known.len = len;
hashed.extra_known.entries = xmalloc(sizeof(struct hash) * len);
edit in change.c at line 281

[4.1641]

[9.1373]

printf("[[extra_known]]\n");
for (i = 0; i < hashed.extra_known.len; i++) {
hashed.extra_known.entries[i].variant = bincode_getu32(&binstat);
switch (hashed.extra_known.entries[i].variant) {
case HASH_BLAKE3:
memcpy(hashed.extra_known.entries[i].bytes, binstat.buf, BLAKE3_BYTES);
binstat.buf += BLAKE3_BYTES;
binstat.avail -= BLAKE3_BYTES;
break;
case HASH_NONE:
/* Do nothing, no bytes to consume */
break;
default:
abort();
}
hash_print(&hashed.extra_known.entries[i]);
}
edit in Makefile at line 26

[4.3502]

[11.53469]

OBJS += hash.o