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authorDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2019-07-25 18:22:20 +0200
committerDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2019-07-25 18:23:01 +0200
commit798abd9eaf3c9e8aa83c4dca28cdd44890253efe (patch)
tree4fd782c3fe520605251ce54e176f5b62a71f2ae4 /lib/sqfs/write_table.c
parente7dda79015d1a09ce2764b27137b5de08a3268cb (diff)
Rename table.c to write_table.c in accordance to function it contains
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
Diffstat (limited to 'lib/sqfs/write_table.c')
-rw-r--r--lib/sqfs/write_table.c61
1 files changed, 61 insertions, 0 deletions
diff --git a/lib/sqfs/write_table.c b/lib/sqfs/write_table.c
new file mode 100644
index 0000000..fc90a3f
--- /dev/null
+++ b/lib/sqfs/write_table.c
@@ -0,0 +1,61 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+#include "config.h"
+
+#include "meta_writer.h"
+#include "highlevel.h"
+#include "util.h"
+
+#include <endian.h>
+#include <stdio.h>
+
+int sqfs_write_table(int outfd, sqfs_super_t *super, const void *data,
+ size_t entsize, size_t count, uint64_t *startblock,
+ compressor_t *cmp)
+{
+ size_t ent_per_blocks = SQFS_META_BLOCK_SIZE / entsize;
+ uint64_t blocks[count / ent_per_blocks + 1], block;
+ size_t i, blkidx = 0, tblsize;
+ meta_writer_t *m;
+ uint32_t offset;
+
+ /* Write actual data. Whenever we cross a block boundary, remember
+ the block start offset */
+ m = meta_writer_create(outfd, cmp, false);
+ if (m == NULL)
+ return -1;
+
+ for (i = 0; i < count; ++i) {
+ meta_writer_get_position(m, &block, &offset);
+
+ if (blkidx == 0 || block > blocks[blkidx - 1])
+ blocks[blkidx++] = block;
+
+ if (meta_writer_append(m, data, entsize))
+ goto fail;
+
+ data = (const char *)data + entsize;
+ }
+
+ if (meta_writer_flush(m))
+ goto fail;
+
+ for (i = 0; i < blkidx; ++i)
+ blocks[i] = htole64(blocks[i] + super->bytes_used);
+
+ meta_writer_get_position(m, &block, &offset);
+ super->bytes_used += block;
+ meta_writer_destroy(m);
+
+ /* write new index table */
+ *startblock = super->bytes_used;
+ tblsize = sizeof(blocks[0]) * blkidx;
+
+ if (write_data("writing table index", outfd, blocks, tblsize))
+ return -1;
+
+ super->bytes_used += tblsize;
+ return 0;
+fail:
+ meta_writer_destroy(m);
+ return -1;
+}