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liblzma: Replaced hardcoded 0x0 index indicator byte with macro

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This commit is contained in:
Jia Tan 2022-08-17 17:59:51 +08:00
parent dfecda8752
commit 203b008eb2
6 changed files with 9 additions and 5 deletions
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3
src/liblzma/common/index.h
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@ -22,6 +22,9 @@
/// Maximum Unpadded Size /// Maximum Unpadded Size
#define UNPADDED_SIZE_MAX (LZMA_VLI_MAX & ~LZMA_VLI_C(3)) #define UNPADDED_SIZE_MAX (LZMA_VLI_MAX & ~LZMA_VLI_C(3))
/// Index Indicator based on xz specification
#define INDEX_INDICATOR 0
/// Get the size of the Index Padding field. This is needed by Index encoder /// Get the size of the Index Padding field. This is needed by Index encoder
/// and decoder, but applications should have no use for this. /// and decoder, but applications should have no use for this.

2
src/liblzma/common/index_decoder.c
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@ -80,7 +80,7 @@ index_decode(void *coder_ptr, const lzma_allocator *allocator,
// format". One could argue that the application should // format". One could argue that the application should
// verify the Index Indicator before trying to decode the // verify the Index Indicator before trying to decode the
// Index, but well, I suppose it is simpler this way. // Index, but well, I suppose it is simpler this way.
if (in[(*in_pos)++] != 0x00) if (in[(*in_pos)++] != INDEX_INDICATOR)
return LZMA_DATA_ERROR; return LZMA_DATA_ERROR;
coder->sequence = SEQ_COUNT; coder->sequence = SEQ_COUNT;

2
src/liblzma/common/index_encoder.c
View File

@ -65,7 +65,7 @@ index_encode(void *coder_ptr,
while (*out_pos < out_size) while (*out_pos < out_size)
switch (coder->sequence) { switch (coder->sequence) {
case SEQ_INDICATOR: case SEQ_INDICATOR:
out[*out_pos] = 0x00; out[*out_pos] = INDEX_INDICATOR;
++*out_pos; ++*out_pos;
coder->sequence = SEQ_COUNT; coder->sequence = SEQ_COUNT;
break; break;

2
src/liblzma/common/index_hash.c
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@ -190,7 +190,7 @@ lzma_index_hash_decode(lzma_index_hash *index_hash, const uint8_t *in,
switch (index_hash->sequence) { switch (index_hash->sequence) {
case SEQ_BLOCK: case SEQ_BLOCK:
// Check the Index Indicator is present. // Check the Index Indicator is present.
if (in[(*in_pos)++] != 0x00) if (in[(*in_pos)++] != INDEX_INDICATOR)
return LZMA_DATA_ERROR; return LZMA_DATA_ERROR;
index_hash->sequence = SEQ_COUNT; index_hash->sequence = SEQ_COUNT;

3
src/liblzma/common/stream_decoder.c
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@ -12,6 +12,7 @@
#include "stream_decoder.h" #include "stream_decoder.h"
#include "block_decoder.h" #include "block_decoder.h"
#include "index.h"
typedef struct { typedef struct {
@ -164,7 +165,7 @@ stream_decode(void *coder_ptr, const lzma_allocator *allocator,
if (coder->pos == 0) { if (coder->pos == 0) {
// Detect if it's Index. // Detect if it's Index.
if (in[*in_pos] == 0x00) { if (in[*in_pos] == INDEX_INDICATOR) {
coder->sequence = SEQ_INDEX; coder->sequence = SEQ_INDEX;
break; break;
} }

2
src/liblzma/common/stream_decoder_mt.c
View File

@ -887,7 +887,7 @@ decode_block_header(struct lzma_stream_coder *coder,
if (coder->pos == 0) { if (coder->pos == 0) {
// Detect if it's Index. // Detect if it's Index.
if (in[*in_pos] == 0x00) if (in[*in_pos] == INDEX_INDICATOR)
return LZMA_INDEX_DETECTED; return LZMA_INDEX_DETECTED;
// Calculate the size of the Block Header. Note that // Calculate the size of the Block Header. Note that