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/* SPDX-License-Identifier: GPL-3.0-or-later */
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <lzo/lzo1x.h>
#include "internal.h"
typedef struct {
compressor_t base;
uint8_t buffer[LZO1X_999_MEM_COMPRESS];
} lzo_compressor_t;
static int lzo_write_options(compressor_t *base, int fd)
{
(void)base;
(void)fd;
return 0;
}
static int lzo_read_options(compressor_t *base, int fd)
{
(void)base;
(void)fd;
fputs("lzo extra options are not yet implemented\n", stderr);
return -1;
}
static ssize_t lzo_comp_block(compressor_t *base, const uint8_t *in,
size_t size, uint8_t *out, size_t outsize)
{
lzo_compressor_t *lzo = (lzo_compressor_t *)base;
lzo_uint len = outsize;
if (lzo1x_999_compress(in, size, out, &len, lzo->buffer) != LZO_E_OK) {
fputs("lzo1x_999 failed. According to its "
"manual, this shouldn't happen!\n", stderr);
return -1;
}
if (len < size)
return len;
return 0;
}
static ssize_t lzo_uncomp_block(compressor_t *base, const uint8_t *in,
size_t size, uint8_t *out, size_t outsize)
{
lzo_compressor_t *lzo = (lzo_compressor_t *)base;
lzo_uint len = outsize;
int ret;
ret = lzo1x_decompress_safe(in, size, out, &len, lzo->buffer);
if (ret != LZO_E_OK) {
fputs("lzo decompress: input data is corrupted\n", stderr);
return -1;
}
return len;
}
static void lzo_destroy(compressor_t *base)
{
free(base);
}
compressor_t *create_lzo_compressor(bool compress, size_t block_size)
{
lzo_compressor_t *lzo = calloc(1, sizeof(*lzo));
compressor_t *base = (compressor_t *)lzo;
(void)block_size;
if (lzo == NULL) {
perror("creating lzo compressor");
return NULL;
}
base->destroy = lzo_destroy;
base->do_block = compress ? lzo_comp_block : lzo_uncomp_block;
base->write_options = lzo_write_options;
base->read_options = lzo_read_options;
return base;
}
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