mirror of
https://github.com/smaeul/u-boot.git
synced 2025-11-04 05:50:17 +00:00
94d0a2efc0
The existing zstd API requires the same sequence of calls to perform its task. Create a helper for U-Boot, to avoid code duplication, as is done with other compression algorithms. Make use of of this from the image code. Note that the zstd code lacks a test in test/compression.c and this should be added by the maintainer. Signed-off-by: Simon Glass <sjg@chromium.org>
65 lines
1.2 KiB
C
65 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright 2021 Google LLC
|
|
*/
|
|
|
|
#define LOG_CATEGORY LOGC_BOOT
|
|
|
|
#include <common.h>
|
|
#include <abuf.h>
|
|
#include <log.h>
|
|
#include <malloc.h>
|
|
#include <linux/zstd.h>
|
|
|
|
int zstd_decompress(struct abuf *in, struct abuf *out)
|
|
{
|
|
ZSTD_DStream *dstream;
|
|
ZSTD_inBuffer in_buf;
|
|
ZSTD_outBuffer out_buf;
|
|
void *workspace;
|
|
size_t wsize;
|
|
int ret;
|
|
|
|
wsize = ZSTD_DStreamWorkspaceBound(abuf_size(in));
|
|
workspace = malloc(wsize);
|
|
if (!workspace) {
|
|
debug("%s: cannot allocate workspace of size %zu\n", __func__,
|
|
wsize);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
dstream = ZSTD_initDStream(abuf_size(in), workspace, wsize);
|
|
if (!dstream) {
|
|
log_err("%s: ZSTD_initDStream failed\n", __func__);
|
|
ret = -EPERM;
|
|
goto do_free;
|
|
}
|
|
|
|
in_buf.src = abuf_data(in);
|
|
in_buf.pos = 0;
|
|
in_buf.size = abuf_size(in);
|
|
|
|
out_buf.dst = abuf_data(out);
|
|
out_buf.pos = 0;
|
|
out_buf.size = abuf_size(out);
|
|
|
|
while (1) {
|
|
size_t res;
|
|
|
|
res = ZSTD_decompressStream(dstream, &out_buf, &in_buf);
|
|
if (ZSTD_isError(res)) {
|
|
ret = ZSTD_getErrorCode(res);
|
|
log_err("ZSTD_decompressStream error %d\n", ret);
|
|
goto do_free;
|
|
}
|
|
|
|
if (in_buf.pos >= abuf_size(in) || !res)
|
|
break;
|
|
}
|
|
|
|
ret = out_buf.pos;
|
|
do_free:
|
|
free(workspace);
|
|
return ret;
|
|
}
|