xiuos/tool/shell/letter-shell/file_ext/bzlib/compress.c

578 lines
13 KiB
C

/* ------------------------------------------------------------------
This file is part of bzip2/libbzip2, a program and library for
lossless, block-sorting data compression.
bzip2/libbzip2 version 1.0.4 of 20 December 2006
Copyright (C) 1996-2006 Julian Seward <jseward@bzip.org>
Please read the WARNING, DISCLAIMER and PATENTS sections in the
README file.
This program is released under the terms of the license contained
in the file LICENSE.
------------------------------------------------------------------ */
#include <xiuos.h>
#if defined(FS_VFS) && defined(TOOL_SHELL)
#include <stdint.h>
#include "bzlib_private.h"
#if BZIP2_SPEED >= 5
# define ALWAYS_INLINE_5 ALWAYS_INLINE
#else
# define ALWAYS_INLINE_5
#endif
void BZ2BsInitWrite(EState* s)
{
s->bsLive = 0;
s->bsBuff = 0;
}
static void BsFinishWrite(EState* s)
{
while (s->bsLive > 0) {
*s->posZ++ = (uint8_t)(s->bsBuff >> 24);
s->bsBuff <<= 8;
s->bsLive -= 8;
}
}
static ALWAYS_INLINE_5
void bsW(EState* s, int32_t n, uint32_t v)
{
while (s->bsLive >= 8) {
*s->posZ++ = (uint8_t)(s->bsBuff >> 24);
s->bsBuff <<= 8;
s->bsLive -= 8;
}
s->bsBuff |= (v << (32 - s->bsLive - n));
s->bsLive += n;
}
static
ALWAYS_INLINE_5
void bsW16(EState* s, uint32_t v)
{
while (s->bsLive >= 8) {
*s->posZ++ = (uint8_t)(s->bsBuff >> 24);
s->bsBuff <<= 8;
s->bsLive -= 8;
}
s->bsBuff |= (v << (16 - s->bsLive));
s->bsLive += 16;
}
static inline void bsW1_1(EState* s)
{
if (s->bsLive >= 8) {
*s->posZ++ = (uint8_t)(s->bsBuff >> 24);
s->bsBuff <<= 8;
s->bsLive -= 8;
}
s->bsBuff |= (1 << (31 - s->bsLive));
s->bsLive += 1;
}
static
ALWAYS_INLINE_5
void bsW1_0(EState* s)
{
if (s->bsLive >= 8) {
*s->posZ++ = (uint8_t)(s->bsBuff >> 24);
s->bsBuff <<= 8;
s->bsLive -= 8;
}
s->bsLive += 1;
}
static inline void bsPutU16(EState* s, unsigned u)
{
bsW16(s, u);
}
static
void bsPutU32(EState* s, unsigned u)
{
bsW16(s, (u >> 16) & 0xffff);
bsW16(s, u & 0xffff);
}
static
void MakeMapsE(EState* s)
{
int i;
unsigned cnt = 0;
for (i = 0; i < 256; i++) {
if (s->inUse[i]) {
s->unseqToSeq[i] = cnt;
cnt++;
}
}
s->nInUse = cnt;
}
static
#if defined __i386__
NOINLINE
#endif
int InnerLoop(uint8_t *yy, uint8_t ll_i)
{
register uint8_t rtmp;
register uint8_t* ryy_j;
rtmp = yy[1];
yy[1] = yy[0];
ryy_j = &(yy[1]);
while (ll_i != rtmp) {
register uint8_t rtmp2;
ryy_j++;
rtmp2 = rtmp;
rtmp = *ryy_j;
*ryy_j = rtmp2;
}
yy[0] = rtmp;
return ryy_j - &(yy[0]);
}
static void GenerateMTFValues(EState* s)
{
uint8_t yy[256];
int i;
int zPend;
int32_t wr;
uint32_t* ptr = s->ptr;
MakeMapsE(s);
wr = 0;
zPend = 0;
for (i = 0; i <= s->nInUse+1; i++)
s->mtfFreq[i] = 0;
for (i = 0; i < s->nInUse; i++)
yy[i] = (uint8_t) i;
for (i = 0; i < s->nblock; i++) {
uint8_t ll_i = ll_i;
int32_t j;
ASSERTD(wr <= i, "generateMTFValues(1)");
j = ptr[i] - 1;
if (j < 0)
j += s->nblock;
ll_i = s->unseqToSeq[s->block[j]];
ASSERTD(ll_i < s->nInUse, "generateMTFValues(2a)");
if (yy[0] == ll_i) {
zPend++;
continue;
}
if (zPend > 0) {
process_zPend:
zPend--;
while (1) {
#if 0
if (zPend & 1) {
s->mtfv[wr] = BZ_RUNB; wr++;
s->mtfFreq[BZ_RUNB]++;
} else {
s->mtfv[wr] = BZ_RUNA; wr++;
s->mtfFreq[BZ_RUNA]++;
}
#else
unsigned run = zPend & 1;
s->mtfv[wr] = run;
wr++;
s->mtfFreq[run]++;
#endif
zPend -= 2;
if (zPend < 0)
break;
zPend = (unsigned)zPend / 2;
}
if (i < 0)
goto end;
zPend = 0;
}
j = InnerLoop(yy, ll_i);
s->mtfv[wr] = j+1;
wr++;
s->mtfFreq[j+1]++;
}
i = -1;
if (zPend > 0)
goto process_zPend;
end:
s->mtfv[wr] = s->nInUse+1;
wr++;
s->mtfFreq[s->nInUse+1]++;
s->nMTF = wr;
}
#define BZ_LESSER_ICOST 0
#define BZ_GREATER_ICOST 15
static void SendMTFValues(EState* s)
{
int32_t t, i;
unsigned iter;
unsigned gs;
int32_t alphaSize;
unsigned nSelectors, selCtr;
int32_t nGroups;
#define CODE sendMTFValues__code
#define RFREQ sendMTFValues__rfreq
#define LEN_PACK sendMTFValues__len_pack
unsigned cost[BZ_N_GROUPS];
uint16_t* mtfv = s->mtfv;
alphaSize = s->nInUse + 2;
for (t = 0; t < BZ_N_GROUPS; t++) {
unsigned v;
for (v = 0; v < alphaSize; v++)
s->len[t][v] = BZ_GREATER_ICOST;
}
ASSERTH(s->nMTF > 0, 3001);
nGroups = 2;
nGroups += (s->nMTF >= 200);
nGroups += (s->nMTF >= 600);
nGroups += (s->nMTF >= 1200);
nGroups += (s->nMTF >= 2400);
{
unsigned nPart, remF;
nPart = nGroups;
remF = s->nMTF;
gs = 0;
while (nPart > 0) {
unsigned v;
unsigned ge;
unsigned tFreq, aFreq;
tFreq = remF / nPart;
ge = gs;
aFreq = 0;
while (aFreq < tFreq && ge < alphaSize) {
aFreq += s->mtfFreq[ge++];
}
ge--;
if (ge > gs
&& nPart != nGroups && nPart != 1
&& ((nGroups - nPart) % 2 == 1)
) {
aFreq -= s->mtfFreq[ge];
ge--;
}
for (v = 0; v < alphaSize; v++)
if (v >= gs && v <= ge)
s->len[nPart-1][v] = BZ_LESSER_ICOST;
else
s->len[nPart-1][v] = BZ_GREATER_ICOST;
nPart--;
gs = ge + 1;
remF -= aFreq;
}
}
for (iter = 0; iter < BZ_N_ITERS; iter++) {
for (t = 0; t < nGroups; t++) {
unsigned v;
for (v = 0; v < alphaSize; v++)
s->RFREQ[t][v] = 0;
}
#if BZIP2_SPEED >= 5
if (nGroups == 6) {
unsigned v;
for (v = 0; v < alphaSize; v++) {
s->LEN_PACK[v][0] = (s->len[1][v] << 16) | s->len[0][v];
s->LEN_PACK[v][1] = (s->len[3][v] << 16) | s->len[2][v];
s->LEN_PACK[v][2] = (s->len[5][v] << 16) | s->len[4][v];
}
}
#endif
nSelectors = 0;
gs = 0;
while (1) {
unsigned ge;
unsigned bt, bc;
if (gs >= s->nMTF)
break;
ge = gs + BZ_G_SIZE - 1;
if (ge >= s->nMTF)
ge = s->nMTF-1;
for (t = 0; t < nGroups; t++)
cost[t] = 0;
#if BZIP2_SPEED >= 5
if (nGroups == 6 && 50 == ge-gs+1) {
register uint32_t cost01, cost23, cost45;
register uint16_t icv;
cost01 = cost23 = cost45 = 0;
#define BZ_ITER(nn) \
icv = mtfv[gs+(nn)]; \
cost01 += s->LEN_PACK[icv][0]; \
cost23 += s->LEN_PACK[icv][1]; \
cost45 += s->LEN_PACK[icv][2];
BZ_ITER(0); BZ_ITER(1); BZ_ITER(2); BZ_ITER(3); BZ_ITER(4);
BZ_ITER(5); BZ_ITER(6); BZ_ITER(7); BZ_ITER(8); BZ_ITER(9);
BZ_ITER(10); BZ_ITER(11); BZ_ITER(12); BZ_ITER(13); BZ_ITER(14);
BZ_ITER(15); BZ_ITER(16); BZ_ITER(17); BZ_ITER(18); BZ_ITER(19);
BZ_ITER(20); BZ_ITER(21); BZ_ITER(22); BZ_ITER(23); BZ_ITER(24);
BZ_ITER(25); BZ_ITER(26); BZ_ITER(27); BZ_ITER(28); BZ_ITER(29);
BZ_ITER(30); BZ_ITER(31); BZ_ITER(32); BZ_ITER(33); BZ_ITER(34);
BZ_ITER(35); BZ_ITER(36); BZ_ITER(37); BZ_ITER(38); BZ_ITER(39);
BZ_ITER(40); BZ_ITER(41); BZ_ITER(42); BZ_ITER(43); BZ_ITER(44);
BZ_ITER(45); BZ_ITER(46); BZ_ITER(47); BZ_ITER(48); BZ_ITER(49);
#undef BZ_ITER
cost[0] = cost01 & 0xffff; cost[1] = cost01 >> 16;
cost[2] = cost23 & 0xffff; cost[3] = cost23 >> 16;
cost[4] = cost45 & 0xffff; cost[5] = cost45 >> 16;
} else
#endif
{
for (i = gs; i <= ge; i++) {
unsigned icv = mtfv[i];
for (t = 0; t < nGroups; t++)
cost[t] += s->len[t][icv];
}
}
bc = cost[0];
bt = 0;
for (t = 1; t < nGroups; t++) {
if (cost[t] < bc) {
bc = cost[t];
bt = t;
}
}
s->selector[nSelectors] = bt;
nSelectors++;
#if BZIP2_SPEED >= 4
if (nGroups == 6 && 50 == ge-gs+1) {
#define BZ_ITUR(nn) s->RFREQ[bt][mtfv[gs + (nn)]]++
BZ_ITUR(0); BZ_ITUR(1); BZ_ITUR(2); BZ_ITUR(3); BZ_ITUR(4);
BZ_ITUR(5); BZ_ITUR(6); BZ_ITUR(7); BZ_ITUR(8); BZ_ITUR(9);
BZ_ITUR(10); BZ_ITUR(11); BZ_ITUR(12); BZ_ITUR(13); BZ_ITUR(14);
BZ_ITUR(15); BZ_ITUR(16); BZ_ITUR(17); BZ_ITUR(18); BZ_ITUR(19);
BZ_ITUR(20); BZ_ITUR(21); BZ_ITUR(22); BZ_ITUR(23); BZ_ITUR(24);
BZ_ITUR(25); BZ_ITUR(26); BZ_ITUR(27); BZ_ITUR(28); BZ_ITUR(29);
BZ_ITUR(30); BZ_ITUR(31); BZ_ITUR(32); BZ_ITUR(33); BZ_ITUR(34);
BZ_ITUR(35); BZ_ITUR(36); BZ_ITUR(37); BZ_ITUR(38); BZ_ITUR(39);
BZ_ITUR(40); BZ_ITUR(41); BZ_ITUR(42); BZ_ITUR(43); BZ_ITUR(44);
BZ_ITUR(45); BZ_ITUR(46); BZ_ITUR(47); BZ_ITUR(48); BZ_ITUR(49);
#undef BZ_ITUR
gs = ge + 1;
} else
#endif
{
while (gs <= ge) {
s->RFREQ[bt][mtfv[gs]]++;
gs++;
}
}
}
for (t = 0; t < nGroups; t++)
BZ2HbMakeCodeLengths(s, &(s->len[t][0]), &(s->RFREQ[t][0]), alphaSize, 17 );
}
ASSERTH(nGroups < 8, 3002);
ASSERTH(nSelectors < 32768 && nSelectors <= (2 + (900000 / BZ_G_SIZE)), 3003);
{
uint8_t pos[BZ_N_GROUPS], ll_i, tmp2, tmp;
for (i = 0; i < nGroups; i++)
pos[i] = i;
for (i = 0; i < nSelectors; i++) {
unsigned j;
ll_i = s->selector[i];
j = 0;
tmp = pos[j];
while (ll_i != tmp) {
j++;
tmp2 = tmp;
tmp = pos[j];
pos[j] = tmp2;
}
pos[0] = tmp;
s->selectorMtf[i] = j;
}
}
for (t = 0; t < nGroups; t++) {
unsigned minLen = 32;
unsigned maxLen = 0;
for (i = 0; i < alphaSize; i++) {
if (s->len[t][i] > maxLen) maxLen = s->len[t][i];
if (s->len[t][i] < minLen) minLen = s->len[t][i];
}
ASSERTH(!(maxLen > 17), 3004);
ASSERTH(!(minLen < 1), 3005);
BZ2HbAssignCodes(&(s->CODE[t][0]), &(s->len[t][0]), minLen, maxLen, alphaSize);
}
{
int inUse16 = 0;
for (i = 0; i < 16; i++) {
if (sizeof(long) <= 4) {
inUse16 = inUse16*2 +
((*(uint32_t*)&(s->inUse[i * 16 + 0])
| *(uint32_t*)&(s->inUse[i * 16 + 4])
| *(uint32_t*)&(s->inUse[i * 16 + 8])
| *(uint32_t*)&(s->inUse[i * 16 + 12])) != 0);
} else {
inUse16 = inUse16*2 +
((*(uint64_t*)&(s->inUse[i * 16 + 0])
| *(uint64_t*)&(s->inUse[i * 16 + 8])) != 0);
}
}
bsW16(s, inUse16);
inUse16 <<= (sizeof(int)*8 - 16);
for (i = 0; i < 16; i++) {
if (inUse16 < 0) {
unsigned v16 = 0;
unsigned j;
for (j = 0; j < 16; j++)
v16 = v16*2 + s->inUse[i * 16 + j];
bsW16(s, v16);
}
inUse16 <<= 1;
}
}
bsW(s, 3, nGroups);
bsW(s, 15, nSelectors);
for (i = 0; i < nSelectors; i++) {
unsigned j;
for (j = 0; j < s->selectorMtf[i]; j++)
bsW1_1(s);
bsW1_0(s);
}
for (t = 0; t < nGroups; t++) {
unsigned curr = s->len[t][0];
bsW(s, 5, curr);
for (i = 0; i < alphaSize; i++) {
while (curr < s->len[t][i]) { bsW(s, 2, 2); curr++; }
while (curr > s->len[t][i]) { bsW(s, 2, 3); curr--; }
bsW1_0(s);
}
}
selCtr = 0;
gs = 0;
while (1) {
unsigned ge;
if (gs >= s->nMTF)
break;
ge = gs + BZ_G_SIZE - 1;
if (ge >= s->nMTF)
ge = s->nMTF-1;
ASSERTH(s->selector[selCtr] < nGroups, 3006);
#if 0
if (nGroups == 6 && 50 == ge-gs+1) {
uint16_t mtfv_i;
uint8_t* s_len_sel_selCtr = &(s->len[s->selector[selCtr]][0]);
int32_t* s_code_sel_selCtr = &(s->CODE[s->selector[selCtr]][0]);
#define BZ_ITAH(nn) \
mtfv_i = mtfv[gs+(nn)]; \
bsW(s, s_len_sel_selCtr[mtfv_i], s_code_sel_selCtr[mtfv_i])
BZ_ITAH(0); BZ_ITAH(1); BZ_ITAH(2); BZ_ITAH(3); BZ_ITAH(4);
BZ_ITAH(5); BZ_ITAH(6); BZ_ITAH(7); BZ_ITAH(8); BZ_ITAH(9);
BZ_ITAH(10); BZ_ITAH(11); BZ_ITAH(12); BZ_ITAH(13); BZ_ITAH(14);
BZ_ITAH(15); BZ_ITAH(16); BZ_ITAH(17); BZ_ITAH(18); BZ_ITAH(19);
BZ_ITAH(20); BZ_ITAH(21); BZ_ITAH(22); BZ_ITAH(23); BZ_ITAH(24);
BZ_ITAH(25); BZ_ITAH(26); BZ_ITAH(27); BZ_ITAH(28); BZ_ITAH(29);
BZ_ITAH(30); BZ_ITAH(31); BZ_ITAH(32); BZ_ITAH(33); BZ_ITAH(34);
BZ_ITAH(35); BZ_ITAH(36); BZ_ITAH(37); BZ_ITAH(38); BZ_ITAH(39);
BZ_ITAH(40); BZ_ITAH(41); BZ_ITAH(42); BZ_ITAH(43); BZ_ITAH(44);
BZ_ITAH(45); BZ_ITAH(46); BZ_ITAH(47); BZ_ITAH(48); BZ_ITAH(49);
#undef BZ_ITAH
gs = ge+1;
} else
#endif
{
uint8_t* s_len_sel_selCtr = &(s->len [s->selector[selCtr]][0]);
int32_t* s_code_sel_selCtr = &(s->CODE[s->selector[selCtr]][0]);
while (gs <= ge) {
bsW(s,
s_len_sel_selCtr[mtfv[gs]],
s_code_sel_selCtr[mtfv[gs]]
);
gs++;
}
}
selCtr++;
}
ASSERTH(selCtr == nSelectors, 3007);
#undef CODE
#undef RFREQ
#undef LEN_PACK
}
void BZ2CompressBlock(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);
s->combinedCRC ^= s->blockCRC;
if (s->blockNo > 1)
s->posZ = s->zbits;
origPtr = BZ2BlockSort(s);
}
s->zbits = &((uint8_t*)s->arr2)[s->nblock];
s->posZ = s->zbits;
s->state_out_pos = s->zbits;
if (s->blockNo == 1) {
BZ2BsInitWrite(s);
bsPutU32(s, BZ_HDR_BZH0 + s->blockSize100k);
}
if (s->nblock > 0) {
bsPutU32(s, 0x31415926);
bsPutU16(s, 0x5359);
bsPutU32(s, s->blockCRC);
bsW1_0(s);
bsW(s, 24, origPtr);
GenerateMTFValues(s);
SendMTFValues(s);
}
if (is_last_block) {
bsPutU32(s, 0x17724538);
bsPutU16(s, 0x5090);
bsPutU32(s, s->combinedCRC);
BsFinishWrite(s);
}
}
#endif