aboutsummaryrefslogtreecommitdiff
path: root/lib
diff options
context:
space:
mode:
Diffstat (limited to 'lib')
-rw-r--r--lib/comp/lzma.c34
-rw-r--r--lib/comp/zlib.c13
-rw-r--r--lib/sqfs/frag_reader.c7
-rw-r--r--lib/sqfs/meta_reader.c8
-rw-r--r--lib/sqfs/meta_writer.c10
-rw-r--r--lib/sqfs/super.c4
6 files changed, 39 insertions, 37 deletions
diff --git a/lib/comp/lzma.c b/lib/comp/lzma.c
index fd2a6c7..3169c33 100644
--- a/lib/comp/lzma.c
+++ b/lib/comp/lzma.c
@@ -9,12 +9,11 @@
typedef struct {
compressor_t base;
-
size_t block_size;
- uint8_t buffer[];
} lzma_compressor_t;
-static ssize_t lzma_comp_block(compressor_t *base, uint8_t *block, size_t size)
+static ssize_t lzma_comp_block(compressor_t *base, const uint8_t *in,
+ size_t size, uint8_t *out, size_t outsize)
{
lzma_compressor_t *lzma = (lzma_compressor_t *)base;
lzma_filter filters[5];
@@ -36,16 +35,10 @@ static ssize_t lzma_comp_block(compressor_t *base, uint8_t *block, size_t size)
filters[1].options = NULL;
ret = lzma_stream_buffer_encode(filters, LZMA_CHECK_CRC32, NULL,
- block, size, lzma->buffer,
- &written, lzma->block_size);
-
- if (ret == LZMA_OK) {
- if (written >= size)
- return 0;
+ in, size, out, &written, outsize);
- memcpy(block, lzma->buffer, size);
- return written;
- }
+ if (ret == LZMA_OK)
+ return (written >= size) ? 0 : written;
if (ret != LZMA_BUF_ERROR) {
fputs("lzma block compress failed\n", stderr);
@@ -55,24 +48,21 @@ static ssize_t lzma_comp_block(compressor_t *base, uint8_t *block, size_t size)
return 0;
}
-static ssize_t lzma_uncomp_block(compressor_t *base, uint8_t *block,
- size_t size)
+static ssize_t lzma_uncomp_block(compressor_t *base, const uint8_t *in,
+ size_t size, uint8_t *out, size_t outsize)
{
- lzma_compressor_t *lzma = (lzma_compressor_t *)base;
uint64_t memlimit = 32 * 1024 * 1024;
size_t dest_pos = 0;
size_t src_pos = 0;
lzma_ret ret;
+ (void)base;
ret = lzma_stream_buffer_decode(&memlimit, 0, NULL,
- block, &src_pos, size,
- lzma->buffer, &dest_pos,
- lzma->block_size);
+ in, &src_pos, size,
+ out, &dest_pos, outsize);
- if (ret == LZMA_OK && size == src_pos) {
- memcpy(block, lzma->buffer, dest_pos);
+ if (ret == LZMA_OK && size == src_pos)
return (ssize_t)dest_pos;
- }
fputs("lzma block extract failed\n", stderr);
return -1;
@@ -85,7 +75,7 @@ static void lzma_destroy(compressor_t *base)
compressor_t *create_lzma_compressor(bool compress, size_t block_size)
{
- lzma_compressor_t *lzma = calloc(1, sizeof(*lzma) + block_size);
+ lzma_compressor_t *lzma = calloc(1, sizeof(*lzma));
compressor_t *base = (compressor_t *)lzma;
if (lzma == NULL) {
diff --git a/lib/comp/zlib.c b/lib/comp/zlib.c
index d3bfe70..f151132 100644
--- a/lib/comp/zlib.c
+++ b/lib/comp/zlib.c
@@ -14,7 +14,6 @@ typedef struct {
bool compress;
size_t block_size;
- uint8_t buffer[];
} zlib_compressor_t;
static void zlib_destroy(compressor_t *base)
@@ -30,7 +29,8 @@ static void zlib_destroy(compressor_t *base)
free(zlib);
}
-static ssize_t zlib_do_block(compressor_t *base, uint8_t *block, size_t size)
+static ssize_t zlib_do_block(compressor_t *base, const uint8_t *in,
+ size_t size, uint8_t *out, size_t outsize)
{
zlib_compressor_t *zlib = (zlib_compressor_t *)base;
size_t written;
@@ -47,10 +47,10 @@ static ssize_t zlib_do_block(compressor_t *base, uint8_t *block, size_t size)
return -1;
}
- zlib->strm.next_in = (void *)block;
+ zlib->strm.next_in = (void *)in;
zlib->strm.avail_in = size;
- zlib->strm.next_out = zlib->buffer;
- zlib->strm.avail_out = zlib->block_size;
+ zlib->strm.next_out = out;
+ zlib->strm.avail_out = outsize;
if (zlib->compress) {
ret = deflate(&zlib->strm, Z_FINISH);
@@ -64,7 +64,6 @@ static ssize_t zlib_do_block(compressor_t *base, uint8_t *block, size_t size)
if (zlib->compress && written >= size)
return 0;
- memcpy(block, zlib->buffer, written);
return (ssize_t)written;
}
@@ -78,7 +77,7 @@ static ssize_t zlib_do_block(compressor_t *base, uint8_t *block, size_t size)
compressor_t *create_zlib_compressor(bool compress, size_t block_size)
{
- zlib_compressor_t *zlib = calloc(1, sizeof(*zlib) + block_size);
+ zlib_compressor_t *zlib = calloc(1, sizeof(*zlib));
compressor_t *base = (compressor_t *)zlib;
int ret;
diff --git a/lib/sqfs/frag_reader.c b/lib/sqfs/frag_reader.c
index 1906376..74fd292 100644
--- a/lib/sqfs/frag_reader.c
+++ b/lib/sqfs/frag_reader.c
@@ -42,12 +42,15 @@ static int precache_block(frag_reader_t *f, size_t i)
}
if (compressed) {
- ret = f->cmp->do_block(f->cmp, f->buffer, size);
+ ret = f->cmp->do_block(f->cmp, f->buffer, size,
+ f->buffer + f->block_size, f->block_size);
if (ret <= 0) {
fputs("extracting fragment failed\n", stderr);
return -1;
}
+
+ memmove(f->buffer, f->buffer + f->block_size, ret);
}
f->current_index = i;
@@ -73,7 +76,7 @@ frag_reader_t *frag_reader_create(sqfs_super_t *super, int fd,
++blockcount;
/* pre allocate all the stuff */
- f = calloc(1, sizeof(*f) + super->block_size);
+ f = calloc(1, sizeof(*f) + super->block_size * 2);
if (f == NULL)
goto fail_rd;
diff --git a/lib/sqfs/meta_reader.c b/lib/sqfs/meta_reader.c
index 8cd7c8f..1a70238 100644
--- a/lib/sqfs/meta_reader.c
+++ b/lib/sqfs/meta_reader.c
@@ -79,12 +79,18 @@ int meta_reader_seek(meta_reader_t *m, uint64_t block_start, size_t offset)
goto fail_trunc;
if (compressed) {
- ret = m->cmp->do_block(m->cmp, m->data, size);
+ ret = m->cmp->do_block(m->cmp, m->data, size,
+ m->scratch, sizeof(m->scratch));
if (ret <= 0) {
fputs("error uncompressing meta data block\n", stderr);
return -1;
}
+
+ memcpy(m->data, m->scratch, ret);
+
+ if ((size_t)ret < sizeof(m->data))
+ memset(m->data + ret, 0, sizeof(m->data) - ret);
}
return 0;
diff --git a/lib/sqfs/meta_writer.c b/lib/sqfs/meta_writer.c
index 95092d5..77ceeb9 100644
--- a/lib/sqfs/meta_writer.c
+++ b/lib/sqfs/meta_writer.c
@@ -30,23 +30,27 @@ void meta_writer_destroy(meta_writer_t *m)
int meta_writer_flush(meta_writer_t *m)
{
ssize_t ret, count;
+ void *ptr;
if (m->offset == 0)
return 0;
- ret = m->cmp->do_block(m->cmp, m->data + 2, m->offset);
+ ret = m->cmp->do_block(m->cmp, m->data + 2, m->offset,
+ m->scratch + 2, sizeof(m->scratch) - 2);
if (ret < 0)
return -1;
if (ret > 0) {
- ((uint16_t *)m->data)[0] = htole16(ret);
+ ((uint16_t *)m->scratch)[0] = htole16(ret);
count = ret + 2;
+ ptr = m->scratch;
} else {
((uint16_t *)m->data)[0] = htole16(m->offset | 0x8000);
count = m->offset + 2;
+ ptr = m->data;
}
- ret = write_retry(m->outfd, m->data, count);
+ ret = write_retry(m->outfd, ptr, count);
if (ret < 0) {
perror("writing meta data");
diff --git a/lib/sqfs/super.c b/lib/sqfs/super.c
index b402496..d3b79c6 100644
--- a/lib/sqfs/super.c
+++ b/lib/sqfs/super.c
@@ -17,8 +17,8 @@ int sqfs_super_init(sqfs_super_t *super, size_t block_size, uint32_t mtime,
return -1;
}
- if (block_size < 8192 || block_size >= (1 << 24)) {
- fputs("Block size must be between 8k and 1M\n", stderr);
+ if (block_size < 4096 || block_size >= (1 << 24)) {
+ fputs("Block size must be between 4k and 1M\n", stderr);
return -1;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-05 20:51:06 +0000