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Fix a bug in CopyUncompressedBlockToOutput().

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This commit is contained in:
Zoltan Szabadka 2015-09-25 17:43:54 +02:00
parent 6dd53d6183
commit 85301238ea
2 changed files with 6 additions and 15 deletions
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18
dec/decode.c
View File

@ -826,23 +826,16 @@ BrotliResult BROTLI_NOINLINE CopyUncompressedBlockToOutput(BrotliOutput output,
/* No break, if state is updated, continue to next state */
case BROTLI_STATE_UNCOMPRESSED_WRITE_1:
case BROTLI_STATE_UNCOMPRESSED_WRITE_2:
case BROTLI_STATE_UNCOMPRESSED_WRITE_3:
result = WriteRingBuffer(output, s);
if (result != BROTLI_RESULT_SUCCESS) {
return result;
}
pos &= s->ringbuffer_mask;
s->max_distance = s->max_backward_distance;
if (s->substate_uncompressed == BROTLI_STATE_UNCOMPRESSED_WRITE_2) {
s->substate_uncompressed = BROTLI_STATE_UNCOMPRESSED_SHORT;
break;
}
if (s->substate_uncompressed == BROTLI_STATE_UNCOMPRESSED_WRITE_1) {
/* If we wrote past the logical end of the ringbuffer, copy the tail
of the ringbuffer to its beginning and flush the ringbuffer to the
output. */
memcpy(s->ringbuffer, s->ringbuffer_end, (size_t)pos);
}
/* If we wrote past the logical end of the ringbuffer, copy the tail
of the ringbuffer to its beginning and flush the ringbuffer to the
output. */
memcpy(s->ringbuffer, s->ringbuffer_end, (size_t)pos);
if (pos + s->meta_block_remaining_len >= s->ringbuffer_size) {
s->substate_uncompressed = BROTLI_STATE_UNCOMPRESSED_FILL;
} else {
@ -865,9 +858,8 @@ BrotliResult BROTLI_NOINLINE CopyUncompressedBlockToOutput(BrotliOutput output,
}
s->to_write = s->ringbuffer_size;
s->partially_written = 0;
s->substate_uncompressed = BROTLI_STATE_UNCOMPRESSED_WRITE_3;
s->substate_uncompressed = BROTLI_STATE_UNCOMPRESSED_WRITE_1;
break;
/* No break, continue to next state */
case BROTLI_STATE_UNCOMPRESSED_COPY:
/* Copy straight from the input onto the ringbuffer. The ringbuffer will
be flushed to the output at a later time. */

3
dec/state.h
View File

@ -70,8 +70,7 @@ typedef enum {
BROTLI_STATE_UNCOMPRESSED_FILL,
BROTLI_STATE_UNCOMPRESSED_COPY,
BROTLI_STATE_UNCOMPRESSED_WRITE_1,
BROTLI_STATE_UNCOMPRESSED_WRITE_2,
BROTLI_STATE_UNCOMPRESSED_WRITE_3
BROTLI_STATE_UNCOMPRESSED_WRITE_2
} BrotliRunningUncompressedState;
typedef enum {