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authorDenys Vlasenko2018-02-03 01:30:12 +0100
committerDenys Vlasenko2018-02-03 01:30:12 +0100
commite594fb2171a40d6d8f438140440b6c6b1dad5c41 (patch)
treea3ef3ae4a472bd7b76496ec386a0fcc7a4226004 /archival/libarchive/bz
parent125c3ff4b10ee36b757924b3c55b3ac34e902120 (diff)
downloadbusybox-e594fb2171a40d6d8f438140440b6c6b1dad5c41.zip
busybox-e594fb2171a40d6d8f438140440b6c6b1dad5c41.tar.gz
bzip2: code shrink
function old new delta BZ2_compressBlock 225 230 +5 handle_compress 356 355 -1 bsW16 59 56 -3 bsW 64 61 -3 bsFinishWrite 37 32 -5 prepare_new_block 48 34 -14 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 1/5 up/down: 5/-26) Total: -21 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'archival/libarchive/bz')
-rw-r--r--archival/libarchive/bz/bzlib.c18
-rw-r--r--archival/libarchive/bz/bzlib_private.h5
-rw-r--r--archival/libarchive/bz/compress.c13
3 files changed, 18 insertions, 18 deletions
diff --git a/archival/libarchive/bz/bzlib.c b/archival/libarchive/bz/bzlib.c
index 5f7db74..3572474 100644
--- a/archival/libarchive/bz/bzlib.c
+++ b/archival/libarchive/bz/bzlib.c
@@ -55,8 +55,9 @@ void prepare_new_block(EState* s)
{
int i;
s->nblock = 0;
- s->numZ = 0;
- s->state_out_pos = 0;
+ //indexes inot s->zbits[], initialzation moved to init of s->zbits
+ //s->posZ = s->zbits; // was: s->numZ = 0;
+ //s->state_out_pos = s->zbits;
BZ_INITIALISE_CRC(s->blockCRC);
/* inlined memset would be nice to have here */
for (i = 0; i < 256; i++)
@@ -237,11 +238,10 @@ void /*Bool*/ copy_output_until_stop(EState* s)
if (s->strm->avail_out == 0) break;
/*-- block done? --*/
- if (s->state_out_pos >= s->numZ) break;
+ if (s->state_out_pos >= s->posZ) break;
/*progress_out = True;*/
- *(s->strm->next_out) = s->zbits[s->state_out_pos];
- s->state_out_pos++;
+ *(s->strm->next_out) = *s->state_out_pos++;
s->strm->avail_out--;
s->strm->next_out++;
s->strm->total_out++;
@@ -261,7 +261,7 @@ void /*Bool*/ handle_compress(bz_stream *strm)
while (1) {
if (s->state == BZ_S_OUTPUT) {
/*progress_out |=*/ copy_output_until_stop(s);
- if (s->state_out_pos < s->numZ) break;
+ if (s->state_out_pos < s->posZ) break;
if (s->mode == BZ_M_FINISHING
//# && s->avail_in_expect == 0
&& s->strm->avail_in == 0
@@ -336,7 +336,7 @@ int BZ2_bzCompress(bz_stream *strm, int action)
/*if (s->avail_in_expect != s->strm->avail_in)
return BZ_SEQUENCE_ERROR;*/
/*progress =*/ handle_compress(strm);
- if (s->avail_in_expect > 0 || !isempty_RL(s) || s->state_out_pos < s->numZ)
+ if (s->avail_in_expect > 0 || !isempty_RL(s) || s->state_out_pos < s->posZ)
return BZ_FLUSH_OK;
s->mode = BZ_M_RUNNING;
return BZ_RUN_OK;
@@ -349,9 +349,9 @@ int BZ2_bzCompress(bz_stream *strm, int action)
return BZ_SEQUENCE_ERROR;*/
/*progress =*/ handle_compress(strm);
/*if (!progress) return BZ_SEQUENCE_ERROR;*/
- //#if (s->avail_in_expect > 0 || !isempty_RL(s) || s->state_out_pos < s->numZ)
+ //#if (s->avail_in_expect > 0 || !isempty_RL(s) || s->state_out_pos < s->posZ)
//# return BZ_FINISH_OK;
- if (s->strm->avail_in > 0 || !isempty_RL(s) || s->state_out_pos < s->numZ)
+ if (s->strm->avail_in > 0 || !isempty_RL(s) || s->state_out_pos < s->posZ)
return BZ_FINISH_OK;
/*s->mode = BZ_M_IDLE;*/
return BZ_STREAM_END;
diff --git a/archival/libarchive/bz/bzlib_private.h b/archival/libarchive/bz/bzlib_private.h
index 43e674b..8e44a8e 100644
--- a/archival/libarchive/bz/bzlib_private.h
+++ b/archival/libarchive/bz/bzlib_private.h
@@ -150,8 +150,9 @@ typedef struct EState {
/* input and output limits and current posns */
int32_t nblock;
int32_t nblockMAX;
- int32_t numZ;
- int32_t state_out_pos;
+ //int32_t numZ; // index into s->zbits[], replaced by pointer:
+ uint8_t *posZ;
+ uint8_t *state_out_pos;
/* the buffer for bit stream creation */
uint32_t bsBuff;
diff --git a/archival/libarchive/bz/compress.c b/archival/libarchive/bz/compress.c
index c640173..534cf66 100644
--- a/archival/libarchive/bz/compress.c
+++ b/archival/libarchive/bz/compress.c
@@ -50,8 +50,7 @@ static NOINLINE
void bsFinishWrite(EState* s)
{
while (s->bsLive > 0) {
- s->zbits[s->numZ] = (uint8_t)(s->bsBuff >> 24);
- s->numZ++;
+ *s->posZ++ = (uint8_t)(s->bsBuff >> 24);
s->bsBuff <<= 8;
s->bsLive -= 8;
}
@@ -67,8 +66,7 @@ ALWAYS_INLINE
void bsW(EState* s, int32_t n, uint32_t v)
{
while (s->bsLive >= 8) {
- s->zbits[s->numZ] = (uint8_t)(s->bsBuff >> 24);
- s->numZ++;
+ *s->posZ++ = (uint8_t)(s->bsBuff >> 24);
s->bsBuff <<= 8;
s->bsLive -= 8;
}
@@ -83,8 +81,7 @@ ALWAYS_INLINE
void bsW16(EState* s, uint32_t v)
{
while (s->bsLive >= 8) {
- s->zbits[s->numZ] = (uint8_t)(s->bsBuff >> 24);
- s->numZ++;
+ *s->posZ++ = (uint8_t)(s->bsBuff >> 24);
s->bsBuff <<= 8;
s->bsLive -= 8;
}
@@ -624,12 +621,14 @@ void BZ2_compressBlock(EState* s, int is_last_block)
s->combinedCRC = (s->combinedCRC << 1) | (s->combinedCRC >> 31);
s->combinedCRC ^= s->blockCRC;
if (s->blockNo > 1)
- s->numZ = 0;
+ s->posZ = s->zbits; // was: s->numZ = 0;
BZ2_blockSort(s);
}
s->zbits = &((uint8_t*)s->arr2)[s->nblock];
+ s->posZ = s->zbits;
+ s->state_out_pos = s->zbits;
/*-- If this is the first block, create the stream header. --*/
if (s->blockNo == 1) {