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Continued work on the WAL

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cozis
2025-11-17 21:52:44 +01:00
parent 6126a2e932
commit fb28e94a83
8 changed files with 320 additions and 52 deletions
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src/file_tree.c
+26 -19
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@@ -1,3 +1,4 @@
#include <limits.h>
#include <assert.h>
#include <string.h>
#include <stdlib.h>
@@ -374,28 +375,34 @@ int file_tree_write(FileTree *ft, string path,
for (uint64_t i = first_chunk_index; i <= last_chunk_index; i++)
f->chunks[i] = hashes[i - first_chunk_index];
// Now check which old hashes are no longer used anywhere in the tree
*num_removed = 0;
for (uint64_t i = first_chunk_index; i <= last_chunk_index; i++) {
SHA256 old_hash = prev_hashes[i - first_chunk_index];
// Now check which old hashes are no longer used
// anywhere in the tree
//
// NOTE: If removed_hashes is NULL, the caller isn't
// interested in which hashes are no longer reachable.
if (removed_hashes != NULL) {
*num_removed = 0;
for (uint64_t i = first_chunk_index; i <= last_chunk_index; i++) {
SHA256 old_hash = prev_hashes[i - first_chunk_index];
// Skip zero hashes
bool is_zero = true;
for (int j = 0; j < (int) sizeof(SHA256); j++) {
if (old_hash.data[j] != 0) {
is_zero = false;
break;
// Skip zero hashes
bool is_zero = true;
for (int j = 0; j < (int) sizeof(SHA256); j++) {
if (old_hash.data[j] != 0) {
is_zero = false;
break;
}
}
}
if (is_zero)
continue;
if (is_zero)
continue;
// Check if this hash is still used anywhere in the tree
if (!entity_uses_hash(&ft->root, old_hash)) {
// Not used - add to removed list
if (removed_hashes)
removed_hashes[*num_removed] = old_hash;
(*num_removed)++;
// Check if this hash is still used anywhere in the tree
if (!entity_uses_hash(&ft->root, old_hash)) {
// Not used - add to removed list
if (removed_hashes)
removed_hashes[*num_removed] = old_hash;
(*num_removed)++;
}
}
}