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-rw-r--r--lib/common/Makemodule.am5
-rw-r--r--lib/common/comp_lzo.c229
-rw-r--r--lib/common/compress.c10
-rw-r--r--lib/common/writer.c10
4 files changed, 253 insertions, 1 deletions
diff --git a/lib/common/Makemodule.am b/lib/common/Makemodule.am
index 2e5a812..7e1ec63 100644
--- a/lib/common/Makemodule.am
+++ b/lib/common/Makemodule.am
@@ -6,5 +6,10 @@ libcommon_a_SOURCES += lib/common/data_writer.c include/common.h
libcommon_a_SOURCES += lib/common/get_path.c lib/common/io_stdin.c
libcommon_a_SOURCES += lib/common/writer.c lib/common/perror.c
libcommon_a_SOURCES += lib/common/mkdir_p.c lib/common/filename_sane.c
+libcommon_a_CFLAGS = $(AM_CFLAGS) $(LZO_CFLAGS)
+
+if WITH_LZO
+libcommon_a_SOURCES += lib/common/comp_lzo.c
+endif
noinst_LIBRARIES += libcommon.a
diff --git a/lib/common/comp_lzo.c b/lib/common/comp_lzo.c
new file mode 100644
index 0000000..473b76f
--- /dev/null
+++ b/lib/common/comp_lzo.c
@@ -0,0 +1,229 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+/*
+ * comp_lzo.c
+ *
+ * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
+ */
+#include "config.h"
+#include "common.h"
+
+#include <stdbool.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <lzo/lzo1x.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;
+ sqfs_u8 buffer[sizeof(lzo_options_t) + 2];
+ lzo_options_t opt;
+ int ret;
+
+ 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;
+ }
+
+ *((sqfs_u16 *)buffer) = htole16(0x8000 | sizeof(opt));
+ memcpy(buffer + 2, &opt, sizeof(opt));
+
+ ret = file->write_at(file, sizeof(sqfs_super_t),
+ buffer, sizeof(buffer));
+
+ return ret ? ret : (int)sizeof(buffer);
+}
+
+static int lzo_read_options(sqfs_compressor_t *base, sqfs_file_t *file)
+{
+ lzo_compressor_t *lzo = (lzo_compressor_t *)base;
+ sqfs_u8 buffer[sizeof(lzo_options_t) + 2];
+ lzo_options_t opt;
+ int ret;
+
+ ret = file->read_at(file, sizeof(sqfs_super_t),
+ buffer, sizeof(buffer));
+ if (ret)
+ return ret;
+
+ if (le16toh(*((sqfs_u16 *)buffer)) != (0x8000 | sizeof(opt)))
+ return SQFS_ERROR_CORRUPTED;
+
+ memcpy(&opt, buffer + 2, sizeof(opt));
+ 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;
+}
diff --git a/lib/common/compress.c b/lib/common/compress.c
index 04e1f40..a2f53c2 100644
--- a/lib/common/compress.c
+++ b/lib/common/compress.c
@@ -19,12 +19,20 @@ E_SQFS_COMPRESSOR compressor_get_default(void)
void compressor_print_available(void)
{
+ bool have_compressor;
int i;
fputs("Available compressors:\n", stdout);
for (i = SQFS_COMP_MIN; i <= SQFS_COMP_MAX; ++i) {
- if (sqfs_compressor_exists(i))
+ have_compressor = sqfs_compressor_exists(i);
+
+#ifdef WITH_LZO
+ if (i == SQFS_COMP_LZO)
+ have_compressor = true;
+#endif
+
+ if (have_compressor)
printf("\t%s\n", sqfs_compressor_name_from_id(i));
}
diff --git a/lib/common/writer.c b/lib/common/writer.c
index 1221358..d67f76b 100644
--- a/lib/common/writer.c
+++ b/lib/common/writer.c
@@ -86,6 +86,16 @@ int sqfs_writer_init(sqfs_writer_t *sqfs, const sqfs_writer_cfg_t *wrcfg)
goto fail_file;
sqfs->cmp = sqfs_compressor_create(&cfg);
+
+#ifdef WITH_LZO
+ if (cfg.id == SQFS_COMP_LZO) {
+ if (sqfs->cmp != NULL)
+ sqfs->cmp->destroy(sqfs->cmp);
+
+ sqfs->cmp = lzo_compressor_create(&cfg);
+ }
+#endif
+
if (sqfs->cmp == NULL) {
fputs("Error creating compressor\n", stderr);
goto fail_fs;
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-28 16:10:50 +0000