123 lines
2.9 KiB
C
123 lines
2.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/string.h>
|
|
#include <linux/zstd.h>
|
|
|
|
#include "zstd.h"
|
|
#include "common/zstd_deps.h"
|
|
#include "common/zstd_errors.h"
|
|
|
|
/* Common symbols. zstd_compress must depend on zstd_decompress. */
|
|
|
|
unsigned int zstd_is_error(size_t code)
|
|
{
|
|
return ZSTD_isError(code);
|
|
}
|
|
EXPORT_SYMBOL(zstd_is_error);
|
|
|
|
int zstd_get_error_code(size_t code)
|
|
{
|
|
return ZSTD_getErrorCode(code);
|
|
}
|
|
EXPORT_SYMBOL(zstd_get_error_code);
|
|
|
|
const char *zstd_get_error_name(size_t code)
|
|
{
|
|
return ZSTD_getErrorName(code);
|
|
}
|
|
EXPORT_SYMBOL(zstd_get_error_name);
|
|
|
|
/* Decompression symbols. */
|
|
|
|
size_t zstd_dctx_workspace_bound(void)
|
|
{
|
|
return ZSTD_estimateDCtxSize();
|
|
}
|
|
EXPORT_SYMBOL(zstd_dctx_workspace_bound);
|
|
|
|
zstd_dctx *zstd_init_dctx(void *workspace, size_t workspace_size)
|
|
{
|
|
if (workspace == NULL)
|
|
return NULL;
|
|
return ZSTD_initStaticDCtx(workspace, workspace_size);
|
|
}
|
|
EXPORT_SYMBOL(zstd_init_dctx);
|
|
|
|
size_t zstd_decompress_dctx(zstd_dctx *dctx, void *dst, size_t dst_capacity,
|
|
const void *src, size_t src_size)
|
|
{
|
|
return ZSTD_decompressDCtx(dctx, dst, dst_capacity, src, src_size);
|
|
}
|
|
EXPORT_SYMBOL(zstd_decompress_dctx);
|
|
|
|
size_t zstd_dstream_workspace_bound(size_t max_window_size)
|
|
{
|
|
return ZSTD_estimateDStreamSize(max_window_size);
|
|
}
|
|
EXPORT_SYMBOL(zstd_dstream_workspace_bound);
|
|
|
|
zstd_dstream *zstd_init_dstream(size_t max_window_size, void *workspace,
|
|
size_t workspace_size)
|
|
{
|
|
if (workspace == NULL)
|
|
return NULL;
|
|
(void)max_window_size;
|
|
return ZSTD_initStaticDStream(workspace, workspace_size);
|
|
}
|
|
EXPORT_SYMBOL(zstd_init_dstream);
|
|
|
|
size_t zstd_reset_dstream(zstd_dstream *dstream)
|
|
{
|
|
return ZSTD_resetDStream(dstream);
|
|
}
|
|
EXPORT_SYMBOL(zstd_reset_dstream);
|
|
|
|
size_t zstd_decompress_stream(zstd_dstream *dstream,
|
|
struct zstd_out_buffer *output, struct zstd_in_buffer *input)
|
|
{
|
|
ZSTD_outBuffer o;
|
|
ZSTD_inBuffer i;
|
|
size_t ret;
|
|
|
|
ZSTD_memcpy(&o, output, sizeof(o));
|
|
ZSTD_memcpy(&i, input, sizeof(i));
|
|
ret = ZSTD_decompressStream(dstream, &o, &i);
|
|
ZSTD_memcpy(output, &o, sizeof(o));
|
|
ZSTD_memcpy(input, &i, sizeof(i));
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(zstd_decompress_stream);
|
|
|
|
size_t zstd_find_frame_compressed_size(const void *src, size_t src_size)
|
|
{
|
|
return ZSTD_findFrameCompressedSize(src, src_size);
|
|
}
|
|
EXPORT_SYMBOL(zstd_find_frame_compressed_size);
|
|
|
|
size_t zstd_get_frame_params(struct zstd_frame_params *params, const void *src,
|
|
size_t src_size)
|
|
{
|
|
ZSTD_frameHeader h;
|
|
const size_t ret = ZSTD_getFrameHeader(&h, src, src_size);
|
|
|
|
if (ret != 0)
|
|
return ret;
|
|
|
|
if (h.frameContentSize != ZSTD_CONTENTSIZE_UNKNOWN)
|
|
params->frame_content_size = h.frameContentSize;
|
|
else
|
|
params->frame_content_size = 0;
|
|
|
|
params->window_size = h.windowSize;
|
|
params->dict_id = h.dictID;
|
|
params->checksum_flag = h.checksumFlag;
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(zstd_get_frame_params);
|
|
|
|
MODULE_LICENSE("Dual BSD/GPL");
|
|
MODULE_DESCRIPTION("Zstd Decompressor");
|