1 files changed, 73 insertions, 42 deletions

diff --git a/reftable/block.c b/reftable/block.c
index 00030eee06..0198078485 100644
--- a/reftable/block.c
+++ b/reftable/block.c
@@ -38,9 +38,11 @@ int footer_size(int version)
 }
 
 static int block_writer_register_restart(struct block_writer *w, int n,
-					 int is_restart, struct strbuf *key)
+					 int is_restart, struct reftable_buf *key)
 {
-	int rlen = w->restart_len;
+	int rlen, err;
+
+	rlen = w->restart_len;
 	if (rlen >= MAX_RESTARTS) {
 		is_restart = 0;
 	}
@@ -52,25 +54,30 @@ static int block_writer_register_restart(struct block_writer *w, int n,
 		return -1;
 	if (is_restart) {
 		REFTABLE_ALLOC_GROW(w->restarts, w->restart_len + 1, w->restart_cap);
+		if (!w->restarts)
+			return REFTABLE_OUT_OF_MEMORY_ERROR;
 		w->restarts[w->restart_len++] = w->next;
 	}
 
 	w->next += n;
 
-	strbuf_reset(&w->last_key);
-	strbuf_addbuf(&w->last_key, key);
+	reftable_buf_reset(&w->last_key);
+	err = reftable_buf_add(&w->last_key, key->buf, key->len);
+	if (err < 0)
+		return err;
+
 	w->entries++;
 	return 0;
 }
 
-void block_writer_init(struct block_writer *bw, uint8_t typ, uint8_t *buf,
-		       uint32_t block_size, uint32_t header_off, int hash_size)
+int block_writer_init(struct block_writer *bw, uint8_t typ, uint8_t *block,
+		      uint32_t block_size, uint32_t header_off, int hash_size)
 {
-	bw->buf = buf;
+	bw->block = block;
 	bw->hash_size = hash_size;
 	bw->block_size = block_size;
 	bw->header_off = header_off;
-	bw->buf[header_off] = typ;
+	bw->block[header_off] = typ;
 	bw->next = header_off + 4;
 	bw->restart_interval = 16;
 	bw->entries = 0;
@@ -78,13 +85,17 @@ void block_writer_init(struct block_writer *bw, uint8_t typ, uint8_t *buf,
 	bw->last_key.len = 0;
 	if (!bw->zstream) {
 		REFTABLE_CALLOC_ARRAY(bw->zstream, 1);
+		if (!bw->zstream)
+			return REFTABLE_OUT_OF_MEMORY_ERROR;
 		deflateInit(bw->zstream, 9);
 	}
+
+	return 0;
 }
 
 uint8_t block_writer_type(struct block_writer *bw)
 {
-	return bw->buf[bw->header_off];
+	return bw->block[bw->header_off];
 }
 
 /* Adds the reftable_record to the block. Returns -1 if it does not fit, 0 on
@@ -92,42 +103,45 @@ uint8_t block_writer_type(struct block_writer *bw)
    empty key. */
 int block_writer_add(struct block_writer *w, struct reftable_record *rec)
 {
-	struct strbuf empty = STRBUF_INIT;
-	struct strbuf last =
+	struct reftable_buf empty = REFTABLE_BUF_INIT;
+	struct reftable_buf last =
 		w->entries % w->restart_interval == 0 ? empty : w->last_key;
 	struct string_view out = {
-		.buf = w->buf + w->next,
+		.buf = w->block + w->next,
 		.len = w->block_size - w->next,
 	};
-
 	struct string_view start = out;
-
 	int is_restart = 0;
-	struct strbuf key = STRBUF_INIT;
 	int n = 0;
-	int err = -1;
+	int err;
+
+	err = reftable_record_key(rec, &w->scratch);
+	if (err < 0)
+		goto done;
 
-	reftable_record_key(rec, &key);
-	if (!key.len) {
+	if (!w->scratch.len) {
 		err = REFTABLE_API_ERROR;
 		goto done;
 	}
 
-	n = reftable_encode_key(&is_restart, out, last, key,
+	n = reftable_encode_key(&is_restart, out, last, w->scratch,
 				reftable_record_val_type(rec));
-	if (n < 0)
+	if (n < 0) {
+		err = -1;
 		goto done;
+	}
 	string_view_consume(&out, n);
 
 	n = reftable_record_encode(rec, out, w->hash_size);
-	if (n < 0)
+	if (n < 0) {
+		err = -1;
 		goto done;
+	}
 	string_view_consume(&out, n);
 
 	err = block_writer_register_restart(w, start.len - out.len, is_restart,
-					    &key);
+					    &w->scratch);
 done:
-	strbuf_release(&key);
 	return err;
 }
 
@@ -135,13 +149,13 @@ int block_writer_finish(struct block_writer *w)
 {
 	int i;
 	for (i = 0; i < w->restart_len; i++) {
-		put_be24(w->buf + w->next, w->restarts[i]);
+		put_be24(w->block + w->next, w->restarts[i]);
 		w->next += 3;
 	}
 
-	put_be16(w->buf + w->next, w->restart_len);
+	put_be16(w->block + w->next, w->restart_len);
 	w->next += 2;
-	put_be24(w->buf + 1 + w->header_off, w->next);
+	put_be24(w->block + 1 + w->header_off, w->next);
 
 	/*
 	 * Log records are stored zlib-compressed. Note that the compression
@@ -163,10 +177,14 @@ int block_writer_finish(struct block_writer *w)
 		 */
 		compressed_len = deflateBound(w->zstream, src_len);
 		REFTABLE_ALLOC_GROW(w->compressed, compressed_len, w->compressed_cap);
+		if (!w->compressed) {
+			ret = REFTABLE_OUT_OF_MEMORY_ERROR;
+			return ret;
+		}
 
 		w->zstream->next_out = w->compressed;
 		w->zstream->avail_out = compressed_len;
-		w->zstream->next_in = w->buf + block_header_skip;
+		w->zstream->next_in = w->block + block_header_skip;
 		w->zstream->avail_in = src_len;
 
 		/*
@@ -184,7 +202,7 @@ int block_writer_finish(struct block_writer *w)
 		 * adjust the `next` pointer to point right after the
 		 * compressed data.
 		 */
-		memcpy(w->buf + block_header_skip, w->compressed,
+		memcpy(w->block + block_header_skip, w->compressed,
 		       w->zstream->total_out);
 		w->next = w->zstream->total_out + block_header_skip;
 	}
@@ -219,12 +237,21 @@ int block_reader_init(struct block_reader *br, struct reftable_block *block,
 		/* Log blocks specify the *uncompressed* size in their header. */
 		REFTABLE_ALLOC_GROW(br->uncompressed_data, sz,
 				    br->uncompressed_cap);
+		if (!br->uncompressed_data) {
+			err = REFTABLE_OUT_OF_MEMORY_ERROR;
+			goto done;
+		}
 
 		/* Copy over the block header verbatim. It's not compressed. */
 		memcpy(br->uncompressed_data, block->data, block_header_skip);
 
 		if (!br->zstream) {
 			REFTABLE_CALLOC_ARRAY(br->zstream, 1);
+			if (!br->zstream) {
+				err = REFTABLE_OUT_OF_MEMORY_ERROR;
+				goto done;
+			}
+
 			err = inflateInit(br->zstream);
 		} else {
 			err = inflateReset(br->zstream);
@@ -306,7 +333,7 @@ uint8_t block_reader_type(const struct block_reader *r)
 	return r->block.data[r->header_off];
 }
 
-int block_reader_first_key(const struct block_reader *br, struct strbuf *key)
+int block_reader_first_key(const struct block_reader *br, struct reftable_buf *key)
 {
 	int off = br->header_off + 4, n;
 	struct string_view in = {
@@ -315,7 +342,7 @@ int block_reader_first_key(const struct block_reader *br, struct strbuf *key)
 	};
 	uint8_t extra = 0;
 
-	strbuf_reset(key);
+	reftable_buf_reset(key);
 
 	n = reftable_decode_key(key, &extra, in);
 	if (n < 0)
@@ -336,13 +363,13 @@ void block_iter_seek_start(struct block_iter *it, const struct block_reader *br)
 	it->block = br->block.data;
 	it->block_len = br->block_len;
 	it->hash_size = br->hash_size;
-	strbuf_reset(&it->last_key);
+	reftable_buf_reset(&it->last_key);
 	it->next_off = br->header_off + 4;
 }
 
 struct restart_needle_less_args {
 	int error;
-	struct strbuf needle;
+	struct reftable_buf needle;
 	const struct block_reader *reader;
 };
 
@@ -414,7 +441,7 @@ int block_iter_next(struct block_iter *it, struct reftable_record *rec)
 
 void block_iter_reset(struct block_iter *it)
 {
-	strbuf_reset(&it->last_key);
+	reftable_buf_reset(&it->last_key);
 	it->next_off = 0;
 	it->block = NULL;
 	it->block_len = 0;
@@ -423,12 +450,12 @@ void block_iter_reset(struct block_iter *it)
 
 void block_iter_close(struct block_iter *it)
 {
-	strbuf_release(&it->last_key);
-	strbuf_release(&it->scratch);
+	reftable_buf_release(&it->last_key);
+	reftable_buf_release(&it->scratch);
 }
 
 int block_iter_seek_key(struct block_iter *it, const struct block_reader *br,
-			struct strbuf *want)
+			struct reftable_buf *want)
 {
 	struct restart_needle_less_args args = {
 		.needle = *want,
@@ -503,6 +530,10 @@ int block_iter_seek_key(struct block_iter *it, const struct block_reader *br,
 			goto done;
 		}
 
+		err = reftable_record_key(&rec, &it->last_key);
+		if (err < 0)
+			goto done;
+
 		/*
 		 * Check whether the current key is greater or equal to the
 		 * sought-after key. In case it is greater we know that the
@@ -517,8 +548,7 @@ int block_iter_seek_key(struct block_iter *it, const struct block_reader *br,
 		 * to `last_key` now, and naturally all keys share a prefix
 		 * with themselves.
 		 */
-		reftable_record_key(&rec, &it->last_key);
-		if (strbuf_cmp(&it->last_key, want) >= 0) {
+		if (reftable_buf_cmp(&it->last_key, want) >= 0) {
 			it->next_off = prev_off;
 			goto done;
 		}
@@ -532,10 +562,11 @@ done:
 void block_writer_release(struct block_writer *bw)
 {
 	deflateEnd(bw->zstream);
-	FREE_AND_NULL(bw->zstream);
-	FREE_AND_NULL(bw->restarts);
-	FREE_AND_NULL(bw->compressed);
-	strbuf_release(&bw->last_key);
+	REFTABLE_FREE_AND_NULL(bw->zstream);
+	REFTABLE_FREE_AND_NULL(bw->restarts);
+	REFTABLE_FREE_AND_NULL(bw->compressed);
+	reftable_buf_release(&bw->scratch);
+	reftable_buf_release(&bw->last_key);
 	/* the block is not owned. */
 }