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/* SPDX-License-Identifier: GPL-3.0-or-later */
/*
* compress.c
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*/
#include "common.h"
#include <assert.h>
static int cmp_ids[] = {
SQFS_COMP_XZ,
SQFS_COMP_ZSTD,
SQFS_COMP_GZIP,
SQFS_COMP_LZ4,
SQFS_COMP_LZO,
};
SQFS_COMPRESSOR compressor_get_default(void)
{
sqfs_compressor_config_t cfg;
sqfs_compressor_t *temp;
size_t i;
int ret;
for (i = 0; i < sizeof(cmp_ids) / sizeof(cmp_ids[0]); ++i) {
sqfs_compressor_config_init(&cfg, cmp_ids[i],
SQFS_DEFAULT_BLOCK_SIZE, 0);
ret = sqfs_compressor_create(&cfg, &temp);
if (ret == 0) {
sqfs_destroy(temp);
return cmp_ids[i];
}
}
#ifdef WITH_LZO
return SQFS_COMP_LZO;
#else
assert(0);
#endif
}
void compressor_print_available(void)
{
sqfs_compressor_config_t cfg;
sqfs_compressor_t *temp;
bool have_compressor;
int i, ret, defcomp;
const char *name;
defcomp = compressor_get_default();
fputs("Available SquashFS block compressors:\n", stdout);
for (i = SQFS_COMP_MIN; i <= SQFS_COMP_MAX; ++i) {
sqfs_compressor_config_init(&cfg, i,
SQFS_DEFAULT_BLOCK_SIZE, 0);
ret = sqfs_compressor_create(&cfg, &temp);
have_compressor = false;
if (ret == 0) {
sqfs_destroy(temp);
have_compressor = true;
} else {
#ifdef WITH_LZO
if (i == SQFS_COMP_LZO)
have_compressor = true;
#endif
}
if (have_compressor) {
name = sqfs_compressor_name_from_id(i);
if (defcomp == i) {
printf("\t%s (default)\n", name);
} else {
printf("\t%s\n", name);
}
}
}
fputc('\n', stdout);
}
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