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bzip2: move ->origPtr out of struct EState, make a few members smaller

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function                                             old     new   delta
BZ2_compressBlock                                    223     228      +5
BZ2_blockSort                                         85      88      +3
generateMTFValues                                    356     357      +1
handle_compress                                      355     349      -6
compressStream                                       538     531      -7
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 3/2 up/down: 9/-13)              Total: -4 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2018-02-03 20:50:20 +01:00
parent c9ae8d770b
commit 86be6d5ba9
3 changed files with 27 additions and 27 deletions
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22
archival/libarchive/bz/blocksort.c
View File

@ -1022,16 +1022,15 @@ void mainSort(EState* state)
* arr1[0 .. nblock-1] holds sorted order
*/
static NOINLINE
void BZ2_blockSort(EState* state)
int32_t BZ2_blockSort(EState* state)
{
/* In original bzip2 1.0.4, it's a parameter, but 30
* (which was the default) should work ok. */
enum { wfact = 30 };
unsigned i;
int32_t origPtr = origPtr;
if (state->nblock < 10000) {
fallbackSort(state);
} else {
if (state->nblock >= 10000) {
/* Calculate the location for quadrant, remembering to get
* the alignment right. Assumes that &(block[0]) is at least
* 2-byte aligned -- this should be ok since block is really
@ -1050,24 +1049,25 @@ void BZ2_blockSort(EState* state)
* of whether or not we use the main sort or fallback sort.
*/
state->budget = state->nblock * ((wfact-1) / 3);
mainSort(state);
if (state->budget < 0) {
fallbackSort(state);
}
if (state->budget >= 0)
goto good;
}
fallbackSort(state);
good:
#if BZ_LIGHT_DEBUG
state->origPtr = -1;
origPtr = -1;
#endif
for (i = 0; i < state->nblock; i++) {
if (state->ptr[i] == 0) {
state->origPtr = i;
origPtr = i;
break;
}
}
AssertH(state->origPtr != -1, 1003);
AssertH(origPtr != -1, 1003);
return origPtr;
}

26
archival/libarchive/bz/bzlib_private.h
View File

@ -120,9 +120,11 @@ typedef struct EState {
/* mode this stream is in, and whether inputting */
/* or outputting data */
int32_t mode;
//both smallint?
int32_t state;
uint8_t mode;
uint8_t state;
/* misc administratium */
uint8_t blockSize100k;
/* remembers avail_in when flush/finish requested */
/* bbox: not needed, strm->avail_in always has the same value */
@ -130,12 +132,11 @@ typedef struct EState {
/* uint32_t avail_in_expect; */
/* for doing the block sorting */
int32_t origPtr;
uint32_t *arr1;
uint32_t *arr2;
uint32_t *ftab;
uint16_t* quadrant;
uint16_t *quadrant;
int32_t budget;
/* aliases for arr1 and arr2 */
@ -144,10 +145,6 @@ typedef struct EState {
uint16_t *mtfv;
uint8_t *zbits;
/* guess what */
uint32_t *crc32table;
//move down
/* run-length-encoding of the input */
uint32_t state_in_ch;
int32_t state_in_len;
@ -156,21 +153,22 @@ typedef struct EState {
int32_t nblock;
int32_t nblockMAX;
//int32_t numZ; // index into s->zbits[], replaced by pointer:
uint8_t *posZ;
uint8_t *state_out_pos;
uint8_t *posZ;
uint8_t *state_out_pos;
/* the buffer for bit stream creation */
uint32_t bsBuff;
int32_t bsLive;
/* guess what */
uint32_t *crc32table;
/* block and combined CRCs */
uint32_t blockCRC;
uint32_t combinedCRC;
/* misc administratium */
int32_t blockNo;
int32_t blockSize100k;
//smallint?
/* stuff for coding the MTF values */
int32_t nMTF;
@ -206,7 +204,7 @@ typedef struct EState {
/*-- compression. --*/
static void
static int32_t
BZ2_blockSort(EState*);
static void

6
archival/libarchive/bz/compress.c
View File

@ -665,6 +665,8 @@ void sendMTFValues(EState* s)
static
void BZ2_compressBlock(EState* s, int is_last_block)
{
int32_t origPtr = origPtr;
if (s->nblock > 0) {
BZ_FINALISE_CRC(s->blockCRC);
s->combinedCRC = (s->combinedCRC << 1) | (s->combinedCRC >> 31);
@ -672,7 +674,7 @@ void BZ2_compressBlock(EState* s, int is_last_block)
if (s->blockNo > 1)
s->posZ = s->zbits; // was: s->numZ = 0;
BZ2_blockSort(s);
origPtr = BZ2_blockSort(s);
}
s->zbits = &((uint8_t*)s->arr2)[s->nblock];
@ -713,7 +715,7 @@ void BZ2_compressBlock(EState* s, int is_last_block)
*/
bsW1_0(s);
bsW(s, 24, s->origPtr);
bsW(s, 24, origPtr);
generateMTFValues(s);
sendMTFValues(s);
}