n = size;
memcpy(buf, (char *) buffer + bytes, n);
bytes = n;
- if (bytes < size) {
+ if (bytes <= size) {
+ /*
+ * The above condition must be (bytes <= size), not
+ * (bytes < size). In other words, even though we
+ * expect no more output and set avail_out to zer0,
+ * the input zlib stream may have bytes that express
+ * "this concludes the stream", and we *do* want to
+ * eat that input.
+ *
+ * Otherwise we would not be able to test that we
+ * consumed all the input to reach the expected size;
+ * we also want to check that zlib tells us that all
+ * went well with status == Z_STREAM_END at the end.
+ */
stream->next_out = buf + bytes;
stream->avail_out = size - bytes;
while (status == Z_OK)
status = inflate(stream, Z_FINISH);
}
buf[size] = 0;
- if ((status == Z_OK || status == Z_STREAM_END) && !stream->avail_in) {
+ if (status == Z_STREAM_END && !stream->avail_in) {
inflateEnd(stream);
return buf;
}
#define MAX_DELTA_CACHE (256)
static size_t delta_base_cached;
+
+static struct delta_base_cache_lru_list {
+ struct delta_base_cache_lru_list *prev;
+ struct delta_base_cache_lru_list *next;
+} delta_base_cache_lru = { &delta_base_cache_lru, &delta_base_cache_lru };
+
static struct delta_base_cache_entry {
+ struct delta_base_cache_lru_list lru;
+ void *data;
struct packed_git *p;
off_t base_offset;
unsigned long size;
- void *data;
enum object_type type;
} delta_base_cache[MAX_DELTA_CACHE];
found_cache_entry:
if (!keep_cache) {
ent->data = NULL;
+ ent->lru.next->prev = ent->lru.prev;
+ ent->lru.prev->next = ent->lru.next;
delta_base_cached -= ent->size;
}
else {
if (ent->data) {
free(ent->data);
ent->data = NULL;
+ ent->lru.next->prev = ent->lru.prev;
+ ent->lru.prev->next = ent->lru.next;
delta_base_cached -= ent->size;
}
}
static void add_delta_base_cache(struct packed_git *p, off_t base_offset,
void *base, unsigned long base_size, enum object_type type)
{
- unsigned long i, hash = pack_entry_hash(p, base_offset);
+ unsigned long hash = pack_entry_hash(p, base_offset);
struct delta_base_cache_entry *ent = delta_base_cache + hash;
+ struct delta_base_cache_lru_list *lru;
release_delta_base_cache(ent);
delta_base_cached += base_size;
- for (i = 0; delta_base_cached > delta_base_cache_limit
- && i < MAX_DELTA_CACHE ; i++) {
- struct delta_base_cache_entry *f = delta_base_cache + i;
+
+ for (lru = delta_base_cache_lru.next;
+ delta_base_cached > delta_base_cache_limit
+ && lru != &delta_base_cache_lru;
+ lru = lru->next) {
+ struct delta_base_cache_entry *f = (void *)lru;
if (f->type == OBJ_BLOB)
release_delta_base_cache(f);
}
- for (i = 0; delta_base_cached > delta_base_cache_limit
- && i < MAX_DELTA_CACHE ; i++)
- release_delta_base_cache(delta_base_cache + i);
+ for (lru = delta_base_cache_lru.next;
+ delta_base_cached > delta_base_cache_limit
+ && lru != &delta_base_cache_lru;
+ lru = lru->next) {
+ struct delta_base_cache_entry *f = (void *)lru;
+ release_delta_base_cache(f);
+ }
ent->p = p;
ent->base_offset = base_offset;
ent->type = type;
ent->data = base;
ent->size = base_size;
+ ent->lru.next = &delta_base_cache_lru;
+ ent->lru.prev = delta_base_cache_lru.prev;
+ delta_base_cache_lru.prev->next = &ent->lru;
+ delta_base_cache_lru.prev = &ent->lru;
}
static void *unpack_delta_entry(struct packed_git *p,
}
}
-static void write_sha1_file_prepare(void *buf, unsigned long len,
+static void write_sha1_file_prepare(const void *buf, unsigned long len,
const char *type, unsigned char *sha1,
char *hdr, int *hdrlen)
{
stream->avail_out -= hdrlen;
}
-int hash_sha1_file(void *buf, unsigned long len, const char *type,
+int hash_sha1_file(const void *buf, unsigned long len, const char *type,
unsigned char *sha1)
{
char hdr[32];
int write_sha1_file(void *buf, unsigned long len, const char *type, unsigned char *returnsha1)
{
- int size;
+ int size, ret;
unsigned char *compressed;
z_stream stream;
unsigned char sha1[20];
return error("sha1 file %s: %s\n", filename, strerror(errno));
}
- snprintf(tmpfile, sizeof(tmpfile), "%s/obj_XXXXXX", get_object_directory());
+ snprintf(tmpfile, sizeof(tmpfile), "%s/tmp_obj_XXXXXX", get_object_directory());
fd = mkstemp(tmpfile);
if (fd < 0) {
/* Then the data itself.. */
stream.next_in = buf;
stream.avail_in = len;
- while (deflate(&stream, Z_FINISH) == Z_OK)
- /* nothing */;
- deflateEnd(&stream);
+ ret = deflate(&stream, Z_FINISH);
+ if (ret != Z_STREAM_END)
+ die("unable to deflate new object %s (%d)", sha1_to_hex(sha1), ret);
+
+ ret = deflateEnd(&stream);
+ if (ret != Z_OK)
+ die("deflateEnd on object %s failed (%d)", sha1_to_hex(sha1), ret);
+
size = stream.total_out;
if (write_buffer(fd, compressed, size) < 0)
die("unable to write sha1 file");
fchmod(fd, 0444);
- close(fd);
+ if (close(fd))
+ die("unable to write sha1 file");
free(compressed);
return move_temp_to_file(tmpfile, filename);
int ret;
SHA_CTX c;
- snprintf(tmpfile, sizeof(tmpfile), "%s/obj_XXXXXX", get_object_directory());
+ snprintf(tmpfile, sizeof(tmpfile), "%s/tmp_obj_XXXXXX", get_object_directory());
local = mkstemp(tmpfile);
if (local < 0) {
} while (1);
inflateEnd(&stream);
- close(local);
+ fchmod(local, 0444);
+ if (close(local) != 0)
+ die("unable to write sha1 file");
SHA1_Final(real_sha1, &c);
if (ret != Z_STREAM_END) {
unlink(tmpfile);