Move file extraction code to generic data_reader_t in libsquashfs.a

Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>

1 files changed, 0 insertions, 93 deletions

diff --git a/unpack/extract_file.c b/unpack/extract_file.c
deleted file mode 100644
index 62d1086..0000000
--- a/unpack/extract_file.c
+++ /dev/null
@@ -1,93 +0,0 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
-#include "rdsquashfs.h"
-
-int extract_file(file_info_t *fi, unsqfs_info_t *info, int outfd)
-{
-	size_t i, count, fragsz;
-	bool compressed;
-	uint32_t bs;
-	ssize_t ret;
-	void *ptr;
-
-	count = fi->size / info->block_size;
-
-	if (count > 0) {
-		if (lseek(info->sqfsfd, fi->startblock, SEEK_SET) == (off_t)-1)
-			goto fail_seek;
-
-		for (i = 0; i < count; ++i) {
-			bs = fi->blocksizes[i];
-
-			compressed = (bs & (1 << 24)) == 0;
-			bs &= (1 << 24) - 1;
-
-			if (bs > info->block_size)
-				goto fail_bs;
-
-			ret = read_retry(info->sqfsfd, info->buffer, bs);
-			if (ret < 0)
-				goto fail_rd;
-
-			if ((size_t)ret < bs)
-				goto fail_trunc;
-
-			if (compressed) {
-				ret = info->cmp->do_block(info->cmp,
-							  info->buffer, bs,
-							  info->scratch,
-							  info->block_size);
-				if (ret <= 0)
-					return -1;
-
-				bs = ret;
-				ptr = info->scratch;
-			} else {
-				ptr = info->buffer;
-			}
-
-			ret = write_retry(outfd, ptr, bs);
-			if (ret < 0)
-				goto fail_wr;
-
-			if ((size_t)ret < bs)
-				goto fail_wr_trunc;
-		}
-	}
-
-	fragsz = fi->size % info->block_size;
-
-	if (fragsz > 0) {
-		if (frag_reader_read(info->frag, fi->fragment,
-				     fi->fragment_offset, info->buffer,
-				     fragsz)) {
-			return -1;
-		}
-
-		ret = write_retry(outfd, info->buffer, fragsz);
-		if (ret < 0)
-			goto fail_wr;
-
-		if ((size_t)ret < fragsz)
-			goto fail_wr_trunc;
-	}
-
-	return 0;
-fail_seek:
-	perror("seek on squashfs");
-	return -1;
-fail_wr:
-	perror("writing uncompressed block");
-	return -1;
-fail_wr_trunc:
-	fputs("writing uncompressed block: truncated write\n", stderr);
-	return -1;
-fail_rd:
-	perror("reading from squashfs");
-	return -1;
-fail_trunc:
-	fputs("reading from squashfs: unexpected end of file\n", stderr);
-	return -1;
-fail_bs:
-	fputs("found compressed block larger than block size\n", stderr);
-	return -1;
-}