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-rw-r--r--src/liblzma/simple/simple_coder.c61
1 files changed, 33 insertions, 28 deletions
diff --git a/src/liblzma/simple/simple_coder.c b/src/liblzma/simple/simple_coder.c
index dba5417b..13ebabc7 100644
--- a/src/liblzma/simple/simple_coder.c
+++ b/src/liblzma/simple/simple_coder.c
@@ -18,7 +18,7 @@
/// Copied or encodes/decodes more data to out[].
static lzma_ret
-copy_or_code(lzma_coder *coder, const lzma_allocator *allocator,
+copy_or_code(lzma_simple_coder *coder, const lzma_allocator *allocator,
const uint8_t *restrict in, size_t *restrict in_pos,
size_t in_size, uint8_t *restrict out,
size_t *restrict out_pos, size_t out_size, lzma_action action)
@@ -55,7 +55,7 @@ copy_or_code(lzma_coder *coder, const lzma_allocator *allocator,
static size_t
-call_filter(lzma_coder *coder, uint8_t *buffer, size_t size)
+call_filter(lzma_simple_coder *coder, uint8_t *buffer, size_t size)
{
const size_t filtered = coder->filter(coder->simple,
coder->now_pos, coder->is_encoder,
@@ -66,11 +66,13 @@ call_filter(lzma_coder *coder, uint8_t *buffer, size_t size)
static lzma_ret
-simple_code(lzma_coder *coder, const lzma_allocator *allocator,
+simple_code(void *coder_ptr, const lzma_allocator *allocator,
const uint8_t *restrict in, size_t *restrict in_pos,
size_t in_size, uint8_t *restrict out,
size_t *restrict out_pos, size_t out_size, lzma_action action)
{
+ lzma_simple_coder *coder = coder_ptr;
+
// TODO: Add partial support for LZMA_SYNC_FLUSH. We can support it
// in cases when the filter is able to filter everything. With most
// simple filters it can be done at offset that is a multiple of 2,
@@ -198,8 +200,9 @@ simple_code(lzma_coder *coder, const lzma_allocator *allocator,
static void
-simple_coder_end(lzma_coder *coder, const lzma_allocator *allocator)
+simple_coder_end(void *coder_ptr, const lzma_allocator *allocator)
{
+ lzma_simple_coder *coder = coder_ptr;
lzma_next_end(&coder->next, allocator);
lzma_free(coder->simple, allocator);
lzma_free(coder, allocator);
@@ -208,10 +211,12 @@ simple_coder_end(lzma_coder *coder, const lzma_allocator *allocator)
static lzma_ret
-simple_coder_update(lzma_coder *coder, const lzma_allocator *allocator,
+simple_coder_update(void *coder_ptr, const lzma_allocator *allocator,
const lzma_filter *filters_null lzma_attribute((__unused__)),
const lzma_filter *reversed_filters)
{
+ lzma_simple_coder *coder = coder_ptr;
+
// No update support, just call the next filter in the chain.
return lzma_next_filter_update(
&coder->next, allocator, reversed_filters + 1);
@@ -221,57 +226,57 @@ simple_coder_update(lzma_coder *coder, const lzma_allocator *allocator,
extern lzma_ret
lzma_simple_coder_init(lzma_next_coder *next, const lzma_allocator *allocator,
const lzma_filter_info *filters,
- size_t (*filter)(lzma_simple *simple, uint32_t now_pos,
+ size_t (*filter)(void *simple, uint32_t now_pos,
bool is_encoder, uint8_t *buffer, size_t size),
size_t simple_size, size_t unfiltered_max,
uint32_t alignment, bool is_encoder)
{
- // Allocate memory for the lzma_coder structure if needed.
- if (next->coder == NULL) {
+ // Allocate memory for the lzma_simple_coder structure if needed.
+ lzma_simple_coder *coder = next->coder;
+ if (coder == NULL) {
// Here we allocate space also for the temporary buffer. We
// need twice the size of unfiltered_max, because then it
// is always possible to filter at least unfiltered_max bytes
// more data in coder->buffer[] if it can be filled completely.
- next->coder = lzma_alloc(sizeof(lzma_coder)
+ coder = lzma_alloc(sizeof(lzma_simple_coder)
+ 2 * unfiltered_max, allocator);
- if (next->coder == NULL)
+ if (coder == NULL)
return LZMA_MEM_ERROR;
+ next->coder = coder;
next->code = &simple_code;
next->end = &simple_coder_end;
next->update = &simple_coder_update;
- next->coder->next = LZMA_NEXT_CODER_INIT;
- next->coder->filter = filter;
- next->coder->allocated = 2 * unfiltered_max;
+ coder->next = LZMA_NEXT_CODER_INIT;
+ coder->filter = filter;
+ coder->allocated = 2 * unfiltered_max;
// Allocate memory for filter-specific data structure.
if (simple_size > 0) {
- next->coder->simple = lzma_alloc(
- simple_size, allocator);
- if (next->coder->simple == NULL)
+ coder->simple = lzma_alloc(simple_size, allocator);
+ if (coder->simple == NULL)
return LZMA_MEM_ERROR;
} else {
- next->coder->simple = NULL;
+ coder->simple = NULL;
}
}
if (filters[0].options != NULL) {
const lzma_options_bcj *simple = filters[0].options;
- next->coder->now_pos = simple->start_offset;
- if (next->coder->now_pos & (alignment - 1))
+ coder->now_pos = simple->start_offset;
+ if (coder->now_pos & (alignment - 1))
return LZMA_OPTIONS_ERROR;
} else {
- next->coder->now_pos = 0;
+ coder->now_pos = 0;
}
// Reset variables.
- next->coder->is_encoder = is_encoder;
- next->coder->end_was_reached = false;
- next->coder->pos = 0;
- next->coder->filtered = 0;
- next->coder->size = 0;
-
- return lzma_next_filter_init(
- &next->coder->next, allocator, filters + 1);
+ coder->is_encoder = is_encoder;
+ coder->end_was_reached = false;
+ coder->pos = 0;
+ coder->filtered = 0;
+ coder->size = 0;
+
+ return lzma_next_filter_init(&coder->next, allocator, filters + 1);
}