2 Copyright 2020 Google LLC
4 Use of this source code is governed by a BSD-style
5 license that can be found in the LICENSE file or at
6 https://developers.google.com/open-source/licenses/bsd
9 /* record.c - methods for different types of records. */
14 #include "constants.h"
15 #include "reftable-error.h"
18 static struct reftable_record_vtable
*
19 reftable_record_vtable(struct reftable_record
*rec
);
20 static void *reftable_record_data(struct reftable_record
*rec
);
22 int get_var_int(uint64_t *dest
, struct string_view
*in
)
29 val
= in
->buf
[ptr
] & 0x7f;
31 while (in
->buf
[ptr
] & 0x80) {
36 val
= (val
+ 1) << 7 | (uint64_t)(in
->buf
[ptr
] & 0x7f);
43 int put_var_int(struct string_view
*dest
, uint64_t val
)
45 uint8_t buf
[10] = { 0 };
48 buf
[i
] = (uint8_t)(val
& 0x7f);
56 buf
[i
] = 0x80 | (uint8_t)(val
& 0x7f);
60 n
= sizeof(buf
) - i
- 1;
63 memcpy(dest
->buf
, &buf
[i
+ 1], n
);
67 int reftable_is_block_type(uint8_t typ
)
73 case BLOCK_TYPE_INDEX
:
79 const unsigned char *reftable_ref_record_val1(const struct reftable_ref_record
*rec
)
81 switch (rec
->value_type
) {
82 case REFTABLE_REF_VAL1
:
83 return rec
->value
.val1
;
84 case REFTABLE_REF_VAL2
:
85 return rec
->value
.val2
.value
;
91 const unsigned char *reftable_ref_record_val2(const struct reftable_ref_record
*rec
)
93 switch (rec
->value_type
) {
94 case REFTABLE_REF_VAL2
:
95 return rec
->value
.val2
.target_value
;
101 static int decode_string(struct strbuf
*dest
, struct string_view in
)
103 int start_len
= in
.len
;
105 int n
= get_var_int(&tsize
, &in
);
108 string_view_consume(&in
, n
);
113 strbuf_add(dest
, in
.buf
, tsize
);
114 string_view_consume(&in
, tsize
);
116 return start_len
- in
.len
;
119 static int encode_string(char *str
, struct string_view s
)
121 struct string_view start
= s
;
123 int n
= put_var_int(&s
, l
);
126 string_view_consume(&s
, n
);
129 memcpy(s
.buf
, str
, l
);
130 string_view_consume(&s
, l
);
132 return start
.len
- s
.len
;
135 int reftable_encode_key(int *restart
, struct string_view dest
,
136 struct strbuf prev_key
, struct strbuf key
,
139 struct string_view start
= dest
;
140 int prefix_len
= common_prefix_size(&prev_key
, &key
);
141 uint64_t suffix_len
= key
.len
- prefix_len
;
142 int n
= put_var_int(&dest
, (uint64_t)prefix_len
);
145 string_view_consume(&dest
, n
);
147 *restart
= (prefix_len
== 0);
149 n
= put_var_int(&dest
, suffix_len
<< 3 | (uint64_t)extra
);
152 string_view_consume(&dest
, n
);
154 if (dest
.len
< suffix_len
)
156 memcpy(dest
.buf
, key
.buf
+ prefix_len
, suffix_len
);
157 string_view_consume(&dest
, suffix_len
);
159 return start
.len
- dest
.len
;
162 int reftable_decode_key(struct strbuf
*key
, uint8_t *extra
,
163 struct strbuf last_key
, struct string_view in
)
165 int start_len
= in
.len
;
166 uint64_t prefix_len
= 0;
167 uint64_t suffix_len
= 0;
168 int n
= get_var_int(&prefix_len
, &in
);
171 string_view_consume(&in
, n
);
173 if (prefix_len
> last_key
.len
)
176 n
= get_var_int(&suffix_len
, &in
);
179 string_view_consume(&in
, n
);
181 *extra
= (uint8_t)(suffix_len
& 0x7);
184 if (in
.len
< suffix_len
)
188 strbuf_add(key
, last_key
.buf
, prefix_len
);
189 strbuf_add(key
, in
.buf
, suffix_len
);
190 string_view_consume(&in
, suffix_len
);
192 return start_len
- in
.len
;
195 static void reftable_ref_record_key(const void *r
, struct strbuf
*dest
)
197 const struct reftable_ref_record
*rec
=
198 (const struct reftable_ref_record
*)r
;
200 strbuf_addstr(dest
, rec
->refname
);
203 static void reftable_ref_record_copy_from(void *rec
, const void *src_rec
,
206 struct reftable_ref_record
*ref
= rec
;
207 const struct reftable_ref_record
*src
= src_rec
;
208 assert(hash_size
> 0);
210 /* This is simple and correct, but we could probably reuse the hash
212 reftable_ref_record_release(ref
);
214 ref
->refname
= xstrdup(src
->refname
);
216 ref
->update_index
= src
->update_index
;
217 ref
->value_type
= src
->value_type
;
218 switch (src
->value_type
) {
219 case REFTABLE_REF_DELETION
:
221 case REFTABLE_REF_VAL1
:
222 memcpy(ref
->value
.val1
, src
->value
.val1
, hash_size
);
224 case REFTABLE_REF_VAL2
:
225 memcpy(ref
->value
.val2
.value
, src
->value
.val2
.value
, hash_size
);
226 memcpy(ref
->value
.val2
.target_value
,
227 src
->value
.val2
.target_value
, hash_size
);
229 case REFTABLE_REF_SYMREF
:
230 ref
->value
.symref
= xstrdup(src
->value
.symref
);
235 static char hexdigit(int c
)
239 return 'a' + (c
- 10);
242 static void hex_format(char *dest
, const unsigned char *src
, int hash_size
)
244 assert(hash_size
> 0);
247 for (i
= 0; i
< hash_size
; i
++) {
248 dest
[2 * i
] = hexdigit(src
[i
] >> 4);
249 dest
[2 * i
+ 1] = hexdigit(src
[i
] & 0xf);
251 dest
[2 * hash_size
] = 0;
255 static void reftable_ref_record_print_sz(const struct reftable_ref_record
*ref
,
258 char hex
[GIT_MAX_HEXSZ
+ 1] = { 0 }; /* BUG */
259 printf("ref{%s(%" PRIu64
") ", ref
->refname
, ref
->update_index
);
260 switch (ref
->value_type
) {
261 case REFTABLE_REF_SYMREF
:
262 printf("=> %s", ref
->value
.symref
);
264 case REFTABLE_REF_VAL2
:
265 hex_format(hex
, ref
->value
.val2
.value
, hash_size
);
266 printf("val 2 %s", hex
);
267 hex_format(hex
, ref
->value
.val2
.target_value
,
269 printf("(T %s)", hex
);
271 case REFTABLE_REF_VAL1
:
272 hex_format(hex
, ref
->value
.val1
, hash_size
);
273 printf("val 1 %s", hex
);
275 case REFTABLE_REF_DELETION
:
282 void reftable_ref_record_print(const struct reftable_ref_record
*ref
,
284 reftable_ref_record_print_sz(ref
, hash_size(hash_id
));
287 static void reftable_ref_record_release_void(void *rec
)
289 reftable_ref_record_release(rec
);
292 void reftable_ref_record_release(struct reftable_ref_record
*ref
)
294 switch (ref
->value_type
) {
295 case REFTABLE_REF_SYMREF
:
296 reftable_free(ref
->value
.symref
);
298 case REFTABLE_REF_VAL2
:
300 case REFTABLE_REF_VAL1
:
302 case REFTABLE_REF_DELETION
:
308 reftable_free(ref
->refname
);
309 memset(ref
, 0, sizeof(struct reftable_ref_record
));
312 static uint8_t reftable_ref_record_val_type(const void *rec
)
314 const struct reftable_ref_record
*r
=
315 (const struct reftable_ref_record
*)rec
;
316 return r
->value_type
;
319 static int reftable_ref_record_encode(const void *rec
, struct string_view s
,
322 const struct reftable_ref_record
*r
=
323 (const struct reftable_ref_record
*)rec
;
324 struct string_view start
= s
;
325 int n
= put_var_int(&s
, r
->update_index
);
326 assert(hash_size
> 0);
329 string_view_consume(&s
, n
);
331 switch (r
->value_type
) {
332 case REFTABLE_REF_SYMREF
:
333 n
= encode_string(r
->value
.symref
, s
);
337 string_view_consume(&s
, n
);
339 case REFTABLE_REF_VAL2
:
340 if (s
.len
< 2 * hash_size
) {
343 memcpy(s
.buf
, r
->value
.val2
.value
, hash_size
);
344 string_view_consume(&s
, hash_size
);
345 memcpy(s
.buf
, r
->value
.val2
.target_value
, hash_size
);
346 string_view_consume(&s
, hash_size
);
348 case REFTABLE_REF_VAL1
:
349 if (s
.len
< hash_size
) {
352 memcpy(s
.buf
, r
->value
.val1
, hash_size
);
353 string_view_consume(&s
, hash_size
);
355 case REFTABLE_REF_DELETION
:
361 return start
.len
- s
.len
;
364 static int reftable_ref_record_decode(void *rec
, struct strbuf key
,
365 uint8_t val_type
, struct string_view in
,
368 struct reftable_ref_record
*r
= rec
;
369 struct string_view start
= in
;
370 uint64_t update_index
= 0;
371 int n
= get_var_int(&update_index
, &in
);
374 string_view_consume(&in
, n
);
376 reftable_ref_record_release(r
);
378 assert(hash_size
> 0);
380 r
->refname
= reftable_realloc(r
->refname
, key
.len
+ 1);
381 memcpy(r
->refname
, key
.buf
, key
.len
);
382 r
->update_index
= update_index
;
383 r
->refname
[key
.len
] = 0;
384 r
->value_type
= val_type
;
386 case REFTABLE_REF_VAL1
:
387 if (in
.len
< hash_size
) {
391 memcpy(r
->value
.val1
, in
.buf
, hash_size
);
392 string_view_consume(&in
, hash_size
);
395 case REFTABLE_REF_VAL2
:
396 if (in
.len
< 2 * hash_size
) {
400 memcpy(r
->value
.val2
.value
, in
.buf
, hash_size
);
401 string_view_consume(&in
, hash_size
);
403 memcpy(r
->value
.val2
.target_value
, in
.buf
, hash_size
);
404 string_view_consume(&in
, hash_size
);
407 case REFTABLE_REF_SYMREF
: {
408 struct strbuf dest
= STRBUF_INIT
;
409 int n
= decode_string(&dest
, in
);
413 string_view_consume(&in
, n
);
414 r
->value
.symref
= dest
.buf
;
417 case REFTABLE_REF_DELETION
:
424 return start
.len
- in
.len
;
427 static int reftable_ref_record_is_deletion_void(const void *p
)
429 return reftable_ref_record_is_deletion(
430 (const struct reftable_ref_record
*)p
);
434 static int reftable_ref_record_equal_void(const void *a
,
435 const void *b
, int hash_size
)
437 struct reftable_ref_record
*ra
= (struct reftable_ref_record
*) a
;
438 struct reftable_ref_record
*rb
= (struct reftable_ref_record
*) b
;
439 return reftable_ref_record_equal(ra
, rb
, hash_size
);
442 static void reftable_ref_record_print_void(const void *rec
,
445 reftable_ref_record_print_sz((struct reftable_ref_record
*) rec
, hash_size
);
448 static struct reftable_record_vtable reftable_ref_record_vtable
= {
449 .key
= &reftable_ref_record_key
,
450 .type
= BLOCK_TYPE_REF
,
451 .copy_from
= &reftable_ref_record_copy_from
,
452 .val_type
= &reftable_ref_record_val_type
,
453 .encode
= &reftable_ref_record_encode
,
454 .decode
= &reftable_ref_record_decode
,
455 .release
= &reftable_ref_record_release_void
,
456 .is_deletion
= &reftable_ref_record_is_deletion_void
,
457 .equal
= &reftable_ref_record_equal_void
,
458 .print
= &reftable_ref_record_print_void
,
461 static void reftable_obj_record_key(const void *r
, struct strbuf
*dest
)
463 const struct reftable_obj_record
*rec
=
464 (const struct reftable_obj_record
*)r
;
466 strbuf_add(dest
, rec
->hash_prefix
, rec
->hash_prefix_len
);
469 static void reftable_obj_record_release(void *rec
)
471 struct reftable_obj_record
*obj
= rec
;
472 FREE_AND_NULL(obj
->hash_prefix
);
473 FREE_AND_NULL(obj
->offsets
);
474 memset(obj
, 0, sizeof(struct reftable_obj_record
));
477 static void reftable_obj_record_print(const void *rec
, int hash_size
)
479 const struct reftable_obj_record
*obj
= rec
;
480 char hex
[GIT_MAX_HEXSZ
+ 1] = { 0 };
481 struct strbuf offset_str
= STRBUF_INIT
;
484 for (i
= 0; i
< obj
->offset_len
; i
++)
485 strbuf_addf(&offset_str
, "%" PRIu64
" ", obj
->offsets
[i
]);
486 hex_format(hex
, obj
->hash_prefix
, obj
->hash_prefix_len
);
487 printf("prefix %s (len %d), offsets [%s]\n",
488 hex
, obj
->hash_prefix_len
, offset_str
.buf
);
489 strbuf_release(&offset_str
);
492 static void reftable_obj_record_copy_from(void *rec
, const void *src_rec
,
495 struct reftable_obj_record
*obj
= rec
;
496 const struct reftable_obj_record
*src
=
497 (const struct reftable_obj_record
*)src_rec
;
499 reftable_obj_record_release(obj
);
500 obj
->hash_prefix
= reftable_malloc(src
->hash_prefix_len
);
501 obj
->hash_prefix_len
= src
->hash_prefix_len
;
502 if (src
->hash_prefix_len
)
503 memcpy(obj
->hash_prefix
, src
->hash_prefix
, obj
->hash_prefix_len
);
505 obj
->offsets
= reftable_malloc(src
->offset_len
* sizeof(uint64_t));
506 obj
->offset_len
= src
->offset_len
;
507 COPY_ARRAY(obj
->offsets
, src
->offsets
, src
->offset_len
);
510 static uint8_t reftable_obj_record_val_type(const void *rec
)
512 const struct reftable_obj_record
*r
= rec
;
513 if (r
->offset_len
> 0 && r
->offset_len
< 8)
514 return r
->offset_len
;
518 static int reftable_obj_record_encode(const void *rec
, struct string_view s
,
521 const struct reftable_obj_record
*r
= rec
;
522 struct string_view start
= s
;
526 if (r
->offset_len
== 0 || r
->offset_len
>= 8) {
527 n
= put_var_int(&s
, r
->offset_len
);
531 string_view_consume(&s
, n
);
533 if (r
->offset_len
== 0)
534 return start
.len
- s
.len
;
535 n
= put_var_int(&s
, r
->offsets
[0]);
538 string_view_consume(&s
, n
);
540 last
= r
->offsets
[0];
541 for (i
= 1; i
< r
->offset_len
; i
++) {
542 int n
= put_var_int(&s
, r
->offsets
[i
] - last
);
546 string_view_consume(&s
, n
);
547 last
= r
->offsets
[i
];
549 return start
.len
- s
.len
;
552 static int reftable_obj_record_decode(void *rec
, struct strbuf key
,
553 uint8_t val_type
, struct string_view in
,
556 struct string_view start
= in
;
557 struct reftable_obj_record
*r
= rec
;
558 uint64_t count
= val_type
;
562 r
->hash_prefix
= reftable_malloc(key
.len
);
563 memcpy(r
->hash_prefix
, key
.buf
, key
.len
);
564 r
->hash_prefix_len
= key
.len
;
567 n
= get_var_int(&count
, &in
);
572 string_view_consume(&in
, n
);
578 return start
.len
- in
.len
;
580 r
->offsets
= reftable_malloc(count
* sizeof(uint64_t));
581 r
->offset_len
= count
;
583 n
= get_var_int(&r
->offsets
[0], &in
);
586 string_view_consume(&in
, n
);
588 last
= r
->offsets
[0];
592 int n
= get_var_int(&delta
, &in
);
596 string_view_consume(&in
, n
);
598 last
= r
->offsets
[j
] = (delta
+ last
);
601 return start
.len
- in
.len
;
604 static int not_a_deletion(const void *p
)
609 static int reftable_obj_record_equal_void(const void *a
, const void *b
, int hash_size
)
611 struct reftable_obj_record
*ra
= (struct reftable_obj_record
*) a
;
612 struct reftable_obj_record
*rb
= (struct reftable_obj_record
*) b
;
614 if (ra
->hash_prefix_len
!= rb
->hash_prefix_len
615 || ra
->offset_len
!= rb
->offset_len
)
618 if (ra
->hash_prefix_len
&&
619 memcmp(ra
->hash_prefix
, rb
->hash_prefix
, ra
->hash_prefix_len
))
621 if (ra
->offset_len
&&
622 memcmp(ra
->offsets
, rb
->offsets
, ra
->offset_len
* sizeof(uint64_t)))
628 static struct reftable_record_vtable reftable_obj_record_vtable
= {
629 .key
= &reftable_obj_record_key
,
630 .type
= BLOCK_TYPE_OBJ
,
631 .copy_from
= &reftable_obj_record_copy_from
,
632 .val_type
= &reftable_obj_record_val_type
,
633 .encode
= &reftable_obj_record_encode
,
634 .decode
= &reftable_obj_record_decode
,
635 .release
= &reftable_obj_record_release
,
636 .is_deletion
= ¬_a_deletion
,
637 .equal
= &reftable_obj_record_equal_void
,
638 .print
= &reftable_obj_record_print
,
641 static void reftable_log_record_print_sz(struct reftable_log_record
*log
,
644 char hex
[GIT_MAX_HEXSZ
+ 1] = { 0 };
646 switch (log
->value_type
) {
647 case REFTABLE_LOG_DELETION
:
648 printf("log{%s(%" PRIu64
") delete\n", log
->refname
,
651 case REFTABLE_LOG_UPDATE
:
652 printf("log{%s(%" PRIu64
") %s <%s> %" PRIu64
" %04d\n",
653 log
->refname
, log
->update_index
,
654 log
->value
.update
.name
? log
->value
.update
.name
: "",
655 log
->value
.update
.email
? log
->value
.update
.email
: "",
656 log
->value
.update
.time
,
657 log
->value
.update
.tz_offset
);
658 hex_format(hex
, log
->value
.update
.old_hash
, hash_size
);
659 printf("%s => ", hex
);
660 hex_format(hex
, log
->value
.update
.new_hash
, hash_size
);
661 printf("%s\n\n%s\n}\n", hex
,
662 log
->value
.update
.message
? log
->value
.update
.message
: "");
667 void reftable_log_record_print(struct reftable_log_record
*log
,
670 reftable_log_record_print_sz(log
, hash_size(hash_id
));
673 static void reftable_log_record_key(const void *r
, struct strbuf
*dest
)
675 const struct reftable_log_record
*rec
=
676 (const struct reftable_log_record
*)r
;
677 int len
= strlen(rec
->refname
);
681 strbuf_add(dest
, (uint8_t *)rec
->refname
, len
+ 1);
683 ts
= (~ts
) - rec
->update_index
;
684 put_be64(&i64
[0], ts
);
685 strbuf_add(dest
, i64
, sizeof(i64
));
688 static void reftable_log_record_copy_from(void *rec
, const void *src_rec
,
691 struct reftable_log_record
*dst
= rec
;
692 const struct reftable_log_record
*src
=
693 (const struct reftable_log_record
*)src_rec
;
695 reftable_log_record_release(dst
);
698 dst
->refname
= xstrdup(dst
->refname
);
700 switch (dst
->value_type
) {
701 case REFTABLE_LOG_DELETION
:
703 case REFTABLE_LOG_UPDATE
:
704 if (dst
->value
.update
.email
) {
705 dst
->value
.update
.email
=
706 xstrdup(dst
->value
.update
.email
);
708 if (dst
->value
.update
.name
) {
709 dst
->value
.update
.name
=
710 xstrdup(dst
->value
.update
.name
);
712 if (dst
->value
.update
.message
) {
713 dst
->value
.update
.message
=
714 xstrdup(dst
->value
.update
.message
);
717 if (dst
->value
.update
.new_hash
) {
718 dst
->value
.update
.new_hash
= reftable_malloc(hash_size
);
719 memcpy(dst
->value
.update
.new_hash
,
720 src
->value
.update
.new_hash
, hash_size
);
722 if (dst
->value
.update
.old_hash
) {
723 dst
->value
.update
.old_hash
= reftable_malloc(hash_size
);
724 memcpy(dst
->value
.update
.old_hash
,
725 src
->value
.update
.old_hash
, hash_size
);
731 static void reftable_log_record_release_void(void *rec
)
733 struct reftable_log_record
*r
= rec
;
734 reftable_log_record_release(r
);
737 void reftable_log_record_release(struct reftable_log_record
*r
)
739 reftable_free(r
->refname
);
740 switch (r
->value_type
) {
741 case REFTABLE_LOG_DELETION
:
743 case REFTABLE_LOG_UPDATE
:
744 reftable_free(r
->value
.update
.new_hash
);
745 reftable_free(r
->value
.update
.old_hash
);
746 reftable_free(r
->value
.update
.name
);
747 reftable_free(r
->value
.update
.email
);
748 reftable_free(r
->value
.update
.message
);
751 memset(r
, 0, sizeof(struct reftable_log_record
));
754 static uint8_t reftable_log_record_val_type(const void *rec
)
756 const struct reftable_log_record
*log
=
757 (const struct reftable_log_record
*)rec
;
759 return reftable_log_record_is_deletion(log
) ? 0 : 1;
762 static uint8_t zero
[GIT_SHA256_RAWSZ
] = { 0 };
764 static int reftable_log_record_encode(const void *rec
, struct string_view s
,
767 const struct reftable_log_record
*r
= rec
;
768 struct string_view start
= s
;
770 uint8_t *oldh
= NULL
;
771 uint8_t *newh
= NULL
;
772 if (reftable_log_record_is_deletion(r
))
775 oldh
= r
->value
.update
.old_hash
;
776 newh
= r
->value
.update
.new_hash
;
784 if (s
.len
< 2 * hash_size
)
787 memcpy(s
.buf
, oldh
, hash_size
);
788 memcpy(s
.buf
+ hash_size
, newh
, hash_size
);
789 string_view_consume(&s
, 2 * hash_size
);
791 n
= encode_string(r
->value
.update
.name
? r
->value
.update
.name
: "", s
);
794 string_view_consume(&s
, n
);
796 n
= encode_string(r
->value
.update
.email
? r
->value
.update
.email
: "",
800 string_view_consume(&s
, n
);
802 n
= put_var_int(&s
, r
->value
.update
.time
);
805 string_view_consume(&s
, n
);
810 put_be16(s
.buf
, r
->value
.update
.tz_offset
);
811 string_view_consume(&s
, 2);
814 r
->value
.update
.message
? r
->value
.update
.message
: "", s
);
817 string_view_consume(&s
, n
);
819 return start
.len
- s
.len
;
822 static int reftable_log_record_decode(void *rec
, struct strbuf key
,
823 uint8_t val_type
, struct string_view in
,
826 struct string_view start
= in
;
827 struct reftable_log_record
*r
= rec
;
830 struct strbuf dest
= STRBUF_INIT
;
833 if (key
.len
<= 9 || key
.buf
[key
.len
- 9] != 0)
834 return REFTABLE_FORMAT_ERROR
;
836 r
->refname
= reftable_realloc(r
->refname
, key
.len
- 8);
837 memcpy(r
->refname
, key
.buf
, key
.len
- 8);
838 ts
= get_be64(key
.buf
+ key
.len
- 8);
840 r
->update_index
= (~max
) - ts
;
842 if (val_type
!= r
->value_type
) {
843 switch (r
->value_type
) {
844 case REFTABLE_LOG_UPDATE
:
845 FREE_AND_NULL(r
->value
.update
.old_hash
);
846 FREE_AND_NULL(r
->value
.update
.new_hash
);
847 FREE_AND_NULL(r
->value
.update
.message
);
848 FREE_AND_NULL(r
->value
.update
.email
);
849 FREE_AND_NULL(r
->value
.update
.name
);
851 case REFTABLE_LOG_DELETION
:
856 r
->value_type
= val_type
;
857 if (val_type
== REFTABLE_LOG_DELETION
)
860 if (in
.len
< 2 * hash_size
)
861 return REFTABLE_FORMAT_ERROR
;
863 r
->value
.update
.old_hash
=
864 reftable_realloc(r
->value
.update
.old_hash
, hash_size
);
865 r
->value
.update
.new_hash
=
866 reftable_realloc(r
->value
.update
.new_hash
, hash_size
);
868 memcpy(r
->value
.update
.old_hash
, in
.buf
, hash_size
);
869 memcpy(r
->value
.update
.new_hash
, in
.buf
+ hash_size
, hash_size
);
871 string_view_consume(&in
, 2 * hash_size
);
873 n
= decode_string(&dest
, in
);
876 string_view_consume(&in
, n
);
878 r
->value
.update
.name
=
879 reftable_realloc(r
->value
.update
.name
, dest
.len
+ 1);
880 memcpy(r
->value
.update
.name
, dest
.buf
, dest
.len
);
881 r
->value
.update
.name
[dest
.len
] = 0;
884 n
= decode_string(&dest
, in
);
887 string_view_consume(&in
, n
);
889 r
->value
.update
.email
=
890 reftable_realloc(r
->value
.update
.email
, dest
.len
+ 1);
891 memcpy(r
->value
.update
.email
, dest
.buf
, dest
.len
);
892 r
->value
.update
.email
[dest
.len
] = 0;
895 n
= get_var_int(&ts
, &in
);
898 string_view_consume(&in
, n
);
899 r
->value
.update
.time
= ts
;
903 r
->value
.update
.tz_offset
= get_be16(in
.buf
);
904 string_view_consume(&in
, 2);
907 n
= decode_string(&dest
, in
);
910 string_view_consume(&in
, n
);
912 r
->value
.update
.message
=
913 reftable_realloc(r
->value
.update
.message
, dest
.len
+ 1);
914 memcpy(r
->value
.update
.message
, dest
.buf
, dest
.len
);
915 r
->value
.update
.message
[dest
.len
] = 0;
917 strbuf_release(&dest
);
918 return start
.len
- in
.len
;
921 strbuf_release(&dest
);
922 return REFTABLE_FORMAT_ERROR
;
925 static int null_streq(char *a
, char *b
)
934 return 0 == strcmp(a
, b
);
937 static int zero_hash_eq(uint8_t *a
, uint8_t *b
, int sz
)
945 return !memcmp(a
, b
, sz
);
948 static int reftable_log_record_equal_void(const void *a
,
949 const void *b
, int hash_size
)
951 return reftable_log_record_equal((struct reftable_log_record
*) a
,
952 (struct reftable_log_record
*) b
,
956 int reftable_log_record_equal(const struct reftable_log_record
*a
,
957 const struct reftable_log_record
*b
, int hash_size
)
959 if (!(null_streq(a
->refname
, b
->refname
) &&
960 a
->update_index
== b
->update_index
&&
961 a
->value_type
== b
->value_type
))
964 switch (a
->value_type
) {
965 case REFTABLE_LOG_DELETION
:
967 case REFTABLE_LOG_UPDATE
:
968 return null_streq(a
->value
.update
.name
, b
->value
.update
.name
) &&
969 a
->value
.update
.time
== b
->value
.update
.time
&&
970 a
->value
.update
.tz_offset
== b
->value
.update
.tz_offset
&&
971 null_streq(a
->value
.update
.email
,
972 b
->value
.update
.email
) &&
973 null_streq(a
->value
.update
.message
,
974 b
->value
.update
.message
) &&
975 zero_hash_eq(a
->value
.update
.old_hash
,
976 b
->value
.update
.old_hash
, hash_size
) &&
977 zero_hash_eq(a
->value
.update
.new_hash
,
978 b
->value
.update
.new_hash
, hash_size
);
984 static int reftable_log_record_is_deletion_void(const void *p
)
986 return reftable_log_record_is_deletion(
987 (const struct reftable_log_record
*)p
);
990 static void reftable_log_record_print_void(const void *rec
, int hash_size
)
992 reftable_log_record_print_sz((struct reftable_log_record
*)rec
, hash_size
);
995 static struct reftable_record_vtable reftable_log_record_vtable
= {
996 .key
= &reftable_log_record_key
,
997 .type
= BLOCK_TYPE_LOG
,
998 .copy_from
= &reftable_log_record_copy_from
,
999 .val_type
= &reftable_log_record_val_type
,
1000 .encode
= &reftable_log_record_encode
,
1001 .decode
= &reftable_log_record_decode
,
1002 .release
= &reftable_log_record_release_void
,
1003 .is_deletion
= &reftable_log_record_is_deletion_void
,
1004 .equal
= &reftable_log_record_equal_void
,
1005 .print
= &reftable_log_record_print_void
,
1008 static void reftable_index_record_key(const void *r
, struct strbuf
*dest
)
1010 const struct reftable_index_record
*rec
= r
;
1012 strbuf_addbuf(dest
, &rec
->last_key
);
1015 static void reftable_index_record_copy_from(void *rec
, const void *src_rec
,
1018 struct reftable_index_record
*dst
= rec
;
1019 const struct reftable_index_record
*src
= src_rec
;
1021 strbuf_reset(&dst
->last_key
);
1022 strbuf_addbuf(&dst
->last_key
, &src
->last_key
);
1023 dst
->offset
= src
->offset
;
1026 static void reftable_index_record_release(void *rec
)
1028 struct reftable_index_record
*idx
= rec
;
1029 strbuf_release(&idx
->last_key
);
1032 static uint8_t reftable_index_record_val_type(const void *rec
)
1037 static int reftable_index_record_encode(const void *rec
, struct string_view out
,
1040 const struct reftable_index_record
*r
=
1041 (const struct reftable_index_record
*)rec
;
1042 struct string_view start
= out
;
1044 int n
= put_var_int(&out
, r
->offset
);
1048 string_view_consume(&out
, n
);
1050 return start
.len
- out
.len
;
1053 static int reftable_index_record_decode(void *rec
, struct strbuf key
,
1054 uint8_t val_type
, struct string_view in
,
1057 struct string_view start
= in
;
1058 struct reftable_index_record
*r
= rec
;
1061 strbuf_reset(&r
->last_key
);
1062 strbuf_addbuf(&r
->last_key
, &key
);
1064 n
= get_var_int(&r
->offset
, &in
);
1068 string_view_consume(&in
, n
);
1069 return start
.len
- in
.len
;
1072 static int reftable_index_record_equal(const void *a
, const void *b
, int hash_size
)
1074 struct reftable_index_record
*ia
= (struct reftable_index_record
*) a
;
1075 struct reftable_index_record
*ib
= (struct reftable_index_record
*) b
;
1077 return ia
->offset
== ib
->offset
&& !strbuf_cmp(&ia
->last_key
, &ib
->last_key
);
1080 static void reftable_index_record_print(const void *rec
, int hash_size
)
1082 const struct reftable_index_record
*idx
= rec
;
1083 /* TODO: escape null chars? */
1084 printf("\"%s\" %" PRIu64
"\n", idx
->last_key
.buf
, idx
->offset
);
1087 static struct reftable_record_vtable reftable_index_record_vtable
= {
1088 .key
= &reftable_index_record_key
,
1089 .type
= BLOCK_TYPE_INDEX
,
1090 .copy_from
= &reftable_index_record_copy_from
,
1091 .val_type
= &reftable_index_record_val_type
,
1092 .encode
= &reftable_index_record_encode
,
1093 .decode
= &reftable_index_record_decode
,
1094 .release
= &reftable_index_record_release
,
1095 .is_deletion
= ¬_a_deletion
,
1096 .equal
= &reftable_index_record_equal
,
1097 .print
= &reftable_index_record_print
,
1100 void reftable_record_key(struct reftable_record
*rec
, struct strbuf
*dest
)
1102 reftable_record_vtable(rec
)->key(reftable_record_data(rec
), dest
);
1105 uint8_t reftable_record_type(struct reftable_record
*rec
)
1110 int reftable_record_encode(struct reftable_record
*rec
, struct string_view dest
,
1113 return reftable_record_vtable(rec
)->encode(reftable_record_data(rec
),
1117 void reftable_record_copy_from(struct reftable_record
*rec
,
1118 struct reftable_record
*src
, int hash_size
)
1120 assert(src
->type
== rec
->type
);
1122 reftable_record_vtable(rec
)->copy_from(reftable_record_data(rec
),
1123 reftable_record_data(src
),
1127 uint8_t reftable_record_val_type(struct reftable_record
*rec
)
1129 return reftable_record_vtable(rec
)->val_type(reftable_record_data(rec
));
1132 int reftable_record_decode(struct reftable_record
*rec
, struct strbuf key
,
1133 uint8_t extra
, struct string_view src
, int hash_size
)
1135 return reftable_record_vtable(rec
)->decode(reftable_record_data(rec
),
1136 key
, extra
, src
, hash_size
);
1139 void reftable_record_release(struct reftable_record
*rec
)
1141 reftable_record_vtable(rec
)->release(reftable_record_data(rec
));
1144 int reftable_record_is_deletion(struct reftable_record
*rec
)
1146 return reftable_record_vtable(rec
)->is_deletion(
1147 reftable_record_data(rec
));
1150 int reftable_record_equal(struct reftable_record
*a
, struct reftable_record
*b
, int hash_size
)
1152 if (a
->type
!= b
->type
)
1154 return reftable_record_vtable(a
)->equal(
1155 reftable_record_data(a
), reftable_record_data(b
), hash_size
);
1158 static int hash_equal(const unsigned char *a
, const unsigned char *b
, int hash_size
)
1161 return !memcmp(a
, b
, hash_size
);
1166 int reftable_ref_record_equal(const struct reftable_ref_record
*a
,
1167 const struct reftable_ref_record
*b
, int hash_size
)
1169 assert(hash_size
> 0);
1170 if (!null_streq(a
->refname
, b
->refname
))
1173 if (a
->update_index
!= b
->update_index
||
1174 a
->value_type
!= b
->value_type
)
1177 switch (a
->value_type
) {
1178 case REFTABLE_REF_SYMREF
:
1179 return !strcmp(a
->value
.symref
, b
->value
.symref
);
1180 case REFTABLE_REF_VAL2
:
1181 return hash_equal(a
->value
.val2
.value
, b
->value
.val2
.value
,
1183 hash_equal(a
->value
.val2
.target_value
,
1184 b
->value
.val2
.target_value
, hash_size
);
1185 case REFTABLE_REF_VAL1
:
1186 return hash_equal(a
->value
.val1
, b
->value
.val1
, hash_size
);
1187 case REFTABLE_REF_DELETION
:
1194 int reftable_ref_record_compare_name(const void *a
, const void *b
)
1196 return strcmp(((struct reftable_ref_record
*)a
)->refname
,
1197 ((struct reftable_ref_record
*)b
)->refname
);
1200 int reftable_ref_record_is_deletion(const struct reftable_ref_record
*ref
)
1202 return ref
->value_type
== REFTABLE_REF_DELETION
;
1205 int reftable_log_record_compare_key(const void *a
, const void *b
)
1207 const struct reftable_log_record
*la
= a
;
1208 const struct reftable_log_record
*lb
= b
;
1210 int cmp
= strcmp(la
->refname
, lb
->refname
);
1213 if (la
->update_index
> lb
->update_index
)
1215 return (la
->update_index
< lb
->update_index
) ? 1 : 0;
1218 int reftable_log_record_is_deletion(const struct reftable_log_record
*log
)
1220 return (log
->value_type
== REFTABLE_LOG_DELETION
);
1223 void string_view_consume(struct string_view
*s
, int n
)
1229 static void *reftable_record_data(struct reftable_record
*rec
)
1231 switch (rec
->type
) {
1232 case BLOCK_TYPE_REF
:
1234 case BLOCK_TYPE_LOG
:
1236 case BLOCK_TYPE_INDEX
:
1238 case BLOCK_TYPE_OBJ
:
1244 static struct reftable_record_vtable
*
1245 reftable_record_vtable(struct reftable_record
*rec
)
1247 switch (rec
->type
) {
1248 case BLOCK_TYPE_REF
:
1249 return &reftable_ref_record_vtable
;
1250 case BLOCK_TYPE_LOG
:
1251 return &reftable_log_record_vtable
;
1252 case BLOCK_TYPE_INDEX
:
1253 return &reftable_index_record_vtable
;
1254 case BLOCK_TYPE_OBJ
:
1255 return &reftable_obj_record_vtable
;
1260 struct reftable_record
reftable_new_record(uint8_t typ
)
1262 struct reftable_record clean
= {
1266 /* the following is involved, but the naive solution (just return
1267 * `clean` as is, except for BLOCK_TYPE_INDEX), returns a garbage
1268 * clean.u.obj.offsets pointer on Windows VS CI. Go figure.
1271 case BLOCK_TYPE_OBJ
:
1273 struct reftable_obj_record obj
= { 0 };
1277 case BLOCK_TYPE_INDEX
:
1279 struct reftable_index_record idx
= {
1280 .last_key
= STRBUF_INIT
,
1285 case BLOCK_TYPE_REF
:
1287 struct reftable_ref_record ref
= { 0 };
1291 case BLOCK_TYPE_LOG
:
1293 struct reftable_log_record log
= { 0 };
1301 void reftable_record_print(struct reftable_record
*rec
, int hash_size
)
1303 printf("'%c': ", rec
->type
);
1304 reftable_record_vtable(rec
)->print(reftable_record_data(rec
), hash_size
);