diff options
Diffstat (limited to 'lib/sqfs/comp/lzo.c')
| -rw-r--r-- | lib/sqfs/comp/lzo.c | 217 |
1 files changed, 0 insertions, 217 deletions
diff --git a/lib/sqfs/comp/lzo.c b/lib/sqfs/comp/lzo.c deleted file mode 100644 index 46f9301..0000000 --- a/lib/sqfs/comp/lzo.c +++ /dev/null @@ -1,217 +0,0 @@ -/* SPDX-License-Identifier: LGPL-3.0-or-later */ -/* - * lzo.c - * - * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at> - */ -#define SQFS_BUILDING_DLL -#include "config.h" - -#include <stdbool.h> -#include <stdlib.h> -#include <string.h> - -#include <lzo/lzo1x.h> - -#include "internal.h" - -#define LZO_NUM_ALGS (sizeof(lzo_algs) / sizeof(lzo_algs[0])) - -typedef int (*lzo_cb_t)(const lzo_bytep src, lzo_uint src_len, lzo_bytep dst, - lzo_uintp dst_len, lzo_voidp wrkmem); - -static const struct { - lzo_cb_t compress; - size_t bufsize; -} lzo_algs[] = { - [SQFS_LZO1X_1] = { - .compress = lzo1x_1_compress, - .bufsize = LZO1X_1_MEM_COMPRESS, - }, - [SQFS_LZO1X_1_11] = { - .compress = lzo1x_1_11_compress, - .bufsize = LZO1X_1_11_MEM_COMPRESS, - }, - [SQFS_LZO1X_1_12] = { - .compress = lzo1x_1_12_compress, - .bufsize = LZO1X_1_12_MEM_COMPRESS, - }, - [SQFS_LZO1X_1_15] = { - .compress = lzo1x_1_15_compress, - .bufsize = LZO1X_1_15_MEM_COMPRESS, - }, - [SQFS_LZO1X_999] = { - .compress = lzo1x_999_compress, - .bufsize = LZO1X_999_MEM_COMPRESS, - }, -}; - -typedef struct { - sqfs_compressor_t base; - int algorithm; - int level; - - sqfs_u8 buffer[]; -} lzo_compressor_t; - -typedef struct { - sqfs_u32 algorithm; - sqfs_u32 level; -} lzo_options_t; - -static int lzo_write_options(sqfs_compressor_t *base, sqfs_file_t *file) -{ - lzo_compressor_t *lzo = (lzo_compressor_t *)base; - lzo_options_t opt; - - if (lzo->algorithm == SQFS_LZO_DEFAULT_ALG && - lzo->level == SQFS_LZO_DEFAULT_LEVEL) { - return 0; - } - - opt.algorithm = htole32(lzo->algorithm); - - if (lzo->algorithm == SQFS_LZO1X_999) { - opt.level = htole32(lzo->level); - } else { - opt.level = 0; - } - - return sqfs_generic_write_options(file, &opt, sizeof(opt)); -} - -static int lzo_read_options(sqfs_compressor_t *base, sqfs_file_t *file) -{ - lzo_compressor_t *lzo = (lzo_compressor_t *)base; - lzo_options_t opt; - int ret; - - ret = sqfs_generic_read_options(file, &opt, sizeof(opt)); - if (ret) - return ret; - - lzo->algorithm = le32toh(opt.algorithm); - lzo->level = le32toh(opt.level); - - switch(lzo->algorithm) { - case SQFS_LZO1X_1: - case SQFS_LZO1X_1_11: - case SQFS_LZO1X_1_12: - case SQFS_LZO1X_1_15: - if (lzo->level != 0) - return SQFS_ERROR_UNSUPPORTED; - break; - case SQFS_LZO1X_999: - if (lzo->level < 1 || lzo->level > 9) - return SQFS_ERROR_UNSUPPORTED; - break; - default: - return SQFS_ERROR_UNSUPPORTED; - } - - return 0; -} - -static sqfs_s32 lzo_comp_block(sqfs_compressor_t *base, const sqfs_u8 *in, - sqfs_u32 size, sqfs_u8 *out, sqfs_u32 outsize) -{ - lzo_compressor_t *lzo = (lzo_compressor_t *)base; - lzo_uint len = outsize; - int ret; - - if (size >= 0x7FFFFFFF) - return 0; - - if (lzo->algorithm == SQFS_LZO1X_999 && - lzo->level != SQFS_LZO_DEFAULT_LEVEL) { - ret = lzo1x_999_compress_level(in, size, out, &len, - lzo->buffer, NULL, 0, 0, - lzo->level); - } else { - ret = lzo_algs[lzo->algorithm].compress(in, size, out, - &len, lzo->buffer); - } - - if (ret != LZO_E_OK) - return SQFS_ERROR_COMPRESSOR; - - if (len < size) - return len; - - return 0; -} - -static sqfs_s32 lzo_uncomp_block(sqfs_compressor_t *base, const sqfs_u8 *in, - sqfs_u32 size, sqfs_u8 *out, sqfs_u32 outsize) -{ - lzo_compressor_t *lzo = (lzo_compressor_t *)base; - lzo_uint len = outsize; - int ret; - - if (outsize >= 0x7FFFFFFF) - return 0; - - ret = lzo1x_decompress_safe(in, size, out, &len, lzo->buffer); - - if (ret != LZO_E_OK) - return SQFS_ERROR_COMPRESSOR; - - return len; -} - -static sqfs_compressor_t *lzo_create_copy(sqfs_compressor_t *cmp) -{ - lzo_compressor_t *other = (lzo_compressor_t *)cmp; - lzo_compressor_t *lzo; - - lzo = alloc_flex(sizeof(*lzo), 1, lzo_algs[other->algorithm].bufsize); - if (lzo == NULL) - return NULL; - - memcpy(lzo, other, sizeof(*lzo)); - return (sqfs_compressor_t *)lzo; -} - -static void lzo_destroy(sqfs_compressor_t *base) -{ - free(base); -} - -sqfs_compressor_t *lzo_compressor_create(const sqfs_compressor_config_t *cfg) -{ - sqfs_compressor_t *base; - lzo_compressor_t *lzo; - - if (cfg->flags & ~SQFS_COMP_FLAG_GENERIC_ALL) - return NULL; - - if (cfg->opt.lzo.algorithm >= LZO_NUM_ALGS || - lzo_algs[cfg->opt.lzo.algorithm].compress == NULL) { - return NULL; - } - - if (cfg->opt.lzo.algorithm == SQFS_LZO1X_999) { - if (cfg->opt.lzo.level > SQFS_LZO_MAX_LEVEL) - return NULL; - } else if (cfg->opt.lzo.level != 0) { - return NULL; - } - - lzo = alloc_flex(sizeof(*lzo), 1, - lzo_algs[cfg->opt.lzo.algorithm].bufsize); - base = (sqfs_compressor_t *)lzo; - - if (lzo == NULL) - return NULL; - - lzo->algorithm = cfg->opt.lzo.algorithm; - lzo->level = cfg->opt.lzo.level; - - base->destroy = lzo_destroy; - base->do_block = (cfg->flags & SQFS_COMP_FLAG_UNCOMPRESS) ? - lzo_uncomp_block : lzo_comp_block; - base->write_options = lzo_write_options; - base->read_options = lzo_read_options; - base->create_copy = lzo_create_copy; - return base; -} |