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liblzma: Creates IS_ENC_DICT_SIZE_VALID() macro.

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This creates an internal liblzma macro to test if the dictionary size
is valid for encoding.
This commit is contained in:
Jia Tan 2023-05-08 22:58:09 +08:00
parent c247d06e1f
commit d0f33d672a
2 changed files with 9 additions and 3 deletions
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4
src/liblzma/lz/lz_encoder.c
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@ -196,9 +196,7 @@ lz_encoder_prepare(lzma_mf *mf, const lzma_allocator *allocator,
// For now, the dictionary size is limited to 1.5 GiB. This may grow
// in the future if needed, but it needs a little more work than just
// changing this check.
if (lz_options->dict_size < LZMA_DICT_SIZE_MIN
|| lz_options->dict_size
> (UINT32_C(1) << 30) + (UINT32_C(1) << 29)
if (!IS_ENC_DICT_SIZE_VALID(lz_options->dict_size)
|| lz_options->nice_len > lz_options->match_len_max)
return true;

8
src/liblzma/lz/lz_encoder.h
View file

@ -17,6 +17,14 @@
#include "common.h"
// For now, the dictionary size is limited to 1.5 GiB. This may grow
// in the future if needed, but it needs a little more work than just
// changing this check.
#define IS_ENC_DICT_SIZE_VALID(size) \
((size) >= LZMA_DICT_SIZE_MIN \
&& (size) <= (UINT32_C(1) << 30) + (UINT32_C(1) << 29))
/// A table of these is used by the LZ-based encoder to hold
/// the length-distance pairs found by the match finder.
typedef struct {