/* *******************************************************
* HUF : Huffman block compression
*********************************************************/
+#define HUF_WORKSPACE_MAX_ALIGNMENT 8
+
+static void* HUF_alignUpWorkspace(void* workspace, size_t* workspaceSizePtr, size_t align)
+{
+ size_t const mask = align - 1;
+ size_t const rem = (size_t)workspace & mask;
+ size_t const add = (align - rem) & mask;
+ BYTE* const aligned = (BYTE*)workspace + add;
+ assert((align & (align - 1)) == 0); /* pow 2 */
+ assert(align <= HUF_WORKSPACE_MAX_ALIGNMENT);
+ if (*workspaceSizePtr >= add) {
+ assert(add < align);
+ assert(((size_t)aligned & mask) == 0);
+ *workspaceSizePtr -= add;
+ return aligned;
+ } else {
+ *workspaceSizePtr = 0;
+ return NULL;
+ }
+}
+
+
/* HUF_compressWeights() :
* Same as FSE_compress(), but dedicated to huff0's weights compression.
* The use case needs much less stack memory.
unsigned maxSymbolValue = HUF_TABLELOG_MAX;
U32 tableLog = MAX_FSE_TABLELOG_FOR_HUFF_HEADER;
- HUF_CompressWeightsWksp* wksp = (HUF_CompressWeightsWksp*)workspace;
+ HUF_CompressWeightsWksp* wksp = (HUF_CompressWeightsWksp*)HUF_alignUpWorkspace(workspace, &workspaceSize, sizeof(U32));
if (workspaceSize < sizeof(HUF_CompressWeightsWksp)) return ERROR(GENERIC);
return (size_t)(op-ostart);
}
+static size_t HUF_getNbBits(HUF_CElt elt)
+{
+ return elt & 0xFF;
+}
+
+static size_t HUF_getNbBitsFast(HUF_CElt elt)
+{
+ return elt;
+}
+
+static size_t HUF_getValue(HUF_CElt elt)
+{
+ return elt & ~0xFF;
+}
+
+static size_t HUF_getValueFast(HUF_CElt elt)
+{
+ return elt;
+}
+
+static void HUF_setNbBits(HUF_CElt* elt, size_t nbBits)
+{
+ assert(nbBits <= HUF_TABLELOG_ABSOLUTEMAX);
+ *elt = nbBits;
+}
+
+static void HUF_setValue(HUF_CElt* elt, size_t value)
+{
+ size_t const nbBits = HUF_getNbBits(*elt);
+ if (nbBits > 0) {
+ assert((value >> nbBits) == 0);
+ *elt |= value << (sizeof(HUF_CElt) * 8 - nbBits);
+ }
+}
typedef struct {
HUF_CompressWeightsWksp wksp;
const HUF_CElt* CTable, unsigned maxSymbolValue, unsigned huffLog,
void* workspace, size_t workspaceSize)
{
+ HUF_CElt const* const ct = CTable + 1;
BYTE* op = (BYTE*)dst;
U32 n;
- HUF_WriteCTableWksp* wksp = (HUF_WriteCTableWksp*)workspace;
+ HUF_WriteCTableWksp* wksp = (HUF_WriteCTableWksp*)HUF_alignUpWorkspace(workspace, &workspaceSize, sizeof(U32));
/* check conditions */
if (workspaceSize < sizeof(HUF_WriteCTableWksp)) return ERROR(GENERIC);
for (n=1; n<huffLog+1; n++)
wksp->bitsToWeight[n] = (BYTE)(huffLog + 1 - n);
for (n=0; n<maxSymbolValue; n++)
- wksp->huffWeight[n] = wksp->bitsToWeight[CTable[n].nbBits];
+ wksp->huffWeight[n] = wksp->bitsToWeight[HUF_getNbBits(ct[n])];
/* attempt weights compression by FSE */
if (maxDstSize < 1) return ERROR(dstSize_tooSmall);
U32 rankVal[HUF_TABLELOG_ABSOLUTEMAX + 1]; /* large enough for values from 0 to 16 */
U32 tableLog = 0;
U32 nbSymbols = 0;
+ HUF_CElt* const ct = CTable + 1;
/* get symbol weights */
CHECK_V_F(readSize, HUF_readStats(huffWeight, HUF_SYMBOLVALUE_MAX+1, rankVal, &nbSymbols, &tableLog, src, srcSize));
if (tableLog > HUF_TABLELOG_MAX) return ERROR(tableLog_tooLarge);
if (nbSymbols > *maxSymbolValuePtr+1) return ERROR(maxSymbolValue_tooSmall);
+ CTable[0] = tableLog;
+
/* Prepare base value per rank */
{ U32 n, nextRankStart = 0;
for (n=1; n<=tableLog; n++) {
/* fill nbBits */
{ U32 n; for (n=0; n<nbSymbols; n++) {
const U32 w = huffWeight[n];
- CTable[n].nbBits = (BYTE)(tableLog + 1 - w) & -(w != 0);
+ HUF_setNbBits(ct + n, (BYTE)(tableLog + 1 - w) & -(w != 0));
} }
/* fill val */
{ U16 nbPerRank[HUF_TABLELOG_MAX+2] = {0}; /* support w=0=>n=tableLog+1 */
U16 valPerRank[HUF_TABLELOG_MAX+2] = {0};
- { U32 n; for (n=0; n<nbSymbols; n++) nbPerRank[CTable[n].nbBits]++; }
+ { U32 n; for (n=0; n<nbSymbols; n++) nbPerRank[HUF_getNbBits(ct[n])]++; }
/* determine stating value per rank */
valPerRank[tableLog+1] = 0; /* for w==0 */
{ U16 min = 0;
min >>= 1;
} }
/* assign value within rank, symbol order */
- { U32 n; for (n=0; n<nbSymbols; n++) CTable[n].val = valPerRank[CTable[n].nbBits]++; }
+ { U32 n; for (n=0; n<nbSymbols; n++) HUF_setValue(ct + n, valPerRank[HUF_getNbBits(ct[n])]++); }
}
*maxSymbolValuePtr = nbSymbols - 1;
return readSize;
}
-U32 HUF_getNbBits(const void* symbolTable, U32 symbolValue)
+U32 HUF_getNbBitsFromCTable(HUF_CElt const* CTable, U32 symbolValue)
{
- const HUF_CElt* table = (const HUF_CElt*)symbolTable;
+ const HUF_CElt* ct = CTable + 1;
assert(symbolValue <= HUF_SYMBOLVALUE_MAX);
- return table[symbolValue].nbBits;
+ return (U32)HUF_getNbBits(ct[symbolValue]);
}
*/
static void HUF_buildCTableFromTree(HUF_CElt* CTable, nodeElt const* huffNode, int nonNullRank, U32 maxSymbolValue, U32 maxNbBits)
{
+ HUF_CElt* const ct = CTable + 1;
/* fill result into ctable (val, nbBits) */
int n;
U16 nbPerRank[HUF_TABLELOG_MAX+1] = {0};
min >>= 1;
} }
for (n=0; n<alphabetSize; n++)
- CTable[huffNode[n].byte].nbBits = huffNode[n].nbBits; /* push nbBits per symbol, symbol order */
+ HUF_setNbBits(ct + huffNode[n].byte, huffNode[n].nbBits); /* push nbBits per symbol, symbol order */
for (n=0; n<alphabetSize; n++)
- CTable[n].val = valPerRank[CTable[n].nbBits]++; /* assign value within rank, symbol order */
+ HUF_setValue(ct + n, valPerRank[HUF_getNbBits(ct[n])]++); /* assign value within rank, symbol order */
+ CTable[0] = maxNbBits;
}
-size_t HUF_buildCTable_wksp (HUF_CElt* tree, const unsigned* count, U32 maxSymbolValue, U32 maxNbBits, void* workSpace, size_t wkspSize)
+size_t HUF_buildCTable_wksp (HUF_CElt* CTable, const unsigned* count, U32 maxSymbolValue, U32 maxNbBits, void* workSpace, size_t wkspSize)
{
- HUF_buildCTable_wksp_tables* const wksp_tables = (HUF_buildCTable_wksp_tables*)workSpace;
+ HUF_buildCTable_wksp_tables* const wksp_tables = (HUF_buildCTable_wksp_tables*)HUF_alignUpWorkspace(workSpace, &wkspSize, sizeof(U32));
nodeElt* const huffNode0 = wksp_tables->huffNodeTbl;
nodeElt* const huffNode = huffNode0+1;
int nonNullRank;
/* safety checks */
- if (((size_t)workSpace & 3) != 0) return ERROR(GENERIC); /* must be aligned on 4-bytes boundaries */
if (wkspSize < sizeof(HUF_buildCTable_wksp_tables))
return ERROR(workSpace_tooSmall);
if (maxNbBits == 0) maxNbBits = HUF_TABLELOG_DEFAULT;
maxNbBits = HUF_setMaxHeight(huffNode, (U32)nonNullRank, maxNbBits);
if (maxNbBits > HUF_TABLELOG_MAX) return ERROR(GENERIC); /* check fit into table */
- HUF_buildCTableFromTree(tree, huffNode, nonNullRank, maxSymbolValue, maxNbBits);
+ HUF_buildCTableFromTree(CTable, huffNode, nonNullRank, maxSymbolValue, maxNbBits);
return maxNbBits;
}
size_t HUF_estimateCompressedSize(const HUF_CElt* CTable, const unsigned* count, unsigned maxSymbolValue)
{
+ HUF_CElt const* ct = CTable + 1;
size_t nbBits = 0;
int s;
for (s = 0; s <= (int)maxSymbolValue; ++s) {
- nbBits += CTable[s].nbBits * count[s];
+ nbBits += HUF_getNbBits(ct[s]) * count[s];
}
return nbBits >> 3;
}
int HUF_validateCTable(const HUF_CElt* CTable, const unsigned* count, unsigned maxSymbolValue) {
+ HUF_CElt const* ct = CTable + 1;
int bad = 0;
int s;
for (s = 0; s <= (int)maxSymbolValue; ++s) {
- bad |= (count[s] != 0) & (CTable[s].nbBits == 0);
+ bad |= (count[s] != 0) & (HUF_getNbBits(ct[s]) == 0);
}
return !bad;
}
size_t HUF_compressBound(size_t size) { return HUF_COMPRESSBOUND(size); }
+/** HUF_CStream_t:
+ * Huffman uses its own BIT_CStream_t implementation.
+ * There are three major differences from BIT_CStream_t:
+ * 1. HUF_addBits() takes a HUF_CElt (size_t) which is
+ * the pair (nbBits, value) in the format:
+ * format:
+ * - Bits [0, 4) = nbBits
+ * - Bits [4, 64 - nbBits) = 0
+ * - Bits [64 - nbBits, 64) = value
+ * 2. The bitContainer is built from the upper bits and
+ * right shifted. E.g. to add a new value of N bits
+ * you right shift the bitContainer by N, then or in
+ * the new value into the N upper bits.
+ * 3. The bitstream has two bit containers. You can add
+ * bits to the second container and merge them into
+ * the first container.
+ */
+
+#define HUF_BITS_IN_CONTAINER (sizeof(size_t) * 8)
+
+typedef struct {
+ size_t bitContainer[2];
+ size_t bitPos[2];
+
+ BYTE* startPtr;
+ BYTE* ptr;
+ BYTE* endPtr;
+} HUF_CStream_t;
+
+/**! HUF_initCStream():
+ * Initializes the bistream.
+ * @returns 0 or an error code.
+ */
+static size_t HUF_initCStream(HUF_CStream_t* bitC,
+ void* startPtr, size_t dstCapacity)
+{
+ ZSTD_memset(bitC, 0, sizeof(*bitC));
+ bitC->startPtr = (BYTE*)startPtr;
+ bitC->ptr = bitC->startPtr;
+ bitC->endPtr = bitC->startPtr + dstCapacity - sizeof(bitC->bitContainer[0]);
+ if (dstCapacity <= sizeof(bitC->bitContainer[0])) return ERROR(dstSize_tooSmall);
+ return 0;
+}
+
+/*! HUF_addBits():
+ * Adds the symbol stored in HUF_CElt elt to the bitstream.
+ *
+ * @param elt The element we're adding. This is a (nbBits, value) pair.
+ * See the HUF_CStream_t docs for the format.
+ * @param idx Insert into the bistream at this idx.
+ * @param kFast This is a template parameter. If the bitstream is guaranteed
+ * to have at least 4 unused bits after this call it may be 1,
+ * otherwise it must be 0. HUF_addBits() is faster when fast is set.
+ */
+FORCE_INLINE_TEMPLATE void HUF_addBits(HUF_CStream_t* bitC, HUF_CElt elt, int idx, int kFast)
+{
+ assert(idx <= 1);
+ assert(HUF_getNbBits(elt) <= HUF_TABLELOG_ABSOLUTEMAX);
+ /* This is efficient on x86-64 with BMI2 because shrx
+ * only reads the low 6 bits of the register. The compiler
+ * knows this and elides the mask. When fast is set,
+ * every operation can use the same value loaded from elt.
+ */
+ bitC->bitContainer[idx] >>= HUF_getNbBits(elt);
+ bitC->bitContainer[idx] |= kFast ? HUF_getValueFast(elt) : HUF_getValue(elt);
+ /* We only read the low 8 bits of bitC->bitPos[idx] so it
+ * doesn't matter that the high bits have noise from the value.
+ */
+ bitC->bitPos[idx] += HUF_getNbBitsFast(elt);
+ assert((bitC->bitPos[idx] & 0xFF) <= HUF_BITS_IN_CONTAINER);
+ /* The last 4-bits of elt are dirty if fast is set,
+ * so we must not be overwriting bits that have already been
+ * inserted into the bit container.
+ */
+#if DEBUGLEVEL >= 1
+ {
+ size_t const nbBits = HUF_getNbBits(elt);
+ size_t const dirtyBits = nbBits == 0 ? 0 : BIT_highbit32((U32)nbBits) + 1;
+ /* Middle bits are 0. */
+ assert(((elt >> dirtyBits) << (dirtyBits + nbBits)) == 0);
+ /* We didn't overwrite any bits in the bit container. */
+ assert(!kFast || (bitC->bitPos[idx] & 0xFF) <= HUF_BITS_IN_CONTAINER);
+ }
+#endif
+}
+
+FORCE_INLINE_TEMPLATE void HUF_zeroIndex1(HUF_CStream_t* bitC)
+{
+ bitC->bitContainer[1] = 0;
+ bitC->bitPos[1] = 0;
+}
+
+/*! HUF_mergeIndex1() :
+ * Merges the bit container @ index 1 into the bit container @ index 0
+ * and zeros the bit container @ index 1.
+ */
+FORCE_INLINE_TEMPLATE void HUF_mergeIndex1(HUF_CStream_t* bitC)
+{
+ assert((bitC->bitPos[1] & 0xFF) < HUF_BITS_IN_CONTAINER);
+ bitC->bitContainer[0] >>= (bitC->bitPos[1] & 0xFF);
+ bitC->bitContainer[0] |= bitC->bitContainer[1];
+ bitC->bitPos[0] += bitC->bitPos[1];
+ assert((bitC->bitPos[0] & 0xFF) <= HUF_BITS_IN_CONTAINER);
+}
+
+/*! HUF_flushBits() :
+* Flushes the bits in the bit container @ index 0.
+*
+* @post bitPos will be < 8.
+* @param kFast If kFast is set then we must know a-priori that
+* the bit container will not overflow.
+*/
+FORCE_INLINE_TEMPLATE void HUF_flushBits(HUF_CStream_t* bitC, int kFast)
+{
+ /* The upper bits of bitPos are noisy, so we must mask by 0xFF. */
+ size_t const nbBits = bitC->bitPos[0] & 0xFF;
+ size_t const nbBytes = nbBits >> 3;
+ /* The top nbBits bits of bitContainer are the ones we need. */
+ size_t const bitContainer = bitC->bitContainer[0] >> (HUF_BITS_IN_CONTAINER - nbBits);
+ /* Mask bitPos to account for the bytes we consumed. */
+ bitC->bitPos[0] &= 7;
+ assert(nbBits > 0);
+ assert(nbBits <= sizeof(bitC->bitContainer[0]) * 8);
+ assert(bitC->ptr <= bitC->endPtr);
+ MEM_writeLEST(bitC->ptr, bitContainer);
+ bitC->ptr += nbBytes;
+ assert(!kFast || bitC->ptr <= bitC->endPtr);
+ if (!kFast && bitC->ptr > bitC->endPtr) bitC->ptr = bitC->endPtr;
+ /* bitContainer doesn't need to be modified because the leftover
+ * bits are already the top bitPos bits. And we don't care about
+ * noise in the lower values.
+ */
+}
+
+/*! HUF_endMark()
+ * @returns The Huffman stream end mark: A 1-bit value = 1.
+ */
+static HUF_CElt HUF_endMark(void)
+{
+ HUF_CElt endMark;
+ HUF_setNbBits(&endMark, 1);
+ HUF_setValue(&endMark, 1);
+ return endMark;
+}
+
+/*! HUF_closeCStream() :
+ * @return Size of CStream, in bytes,
+ * or 0 if it could not fit into dstBuffer */
+static size_t HUF_closeCStream(HUF_CStream_t* bitC)
+{
+ HUF_addBits(bitC, HUF_endMark(), /* idx */ 0, /* kFast */ 0);
+ HUF_flushBits(bitC, /* kFast */ 0);
+ {
+ size_t const nbBits = bitC->bitPos[0] & 0xFF;
+ if (bitC->ptr >= bitC->endPtr) return 0; /* overflow detected */
+ return (bitC->ptr - bitC->startPtr) + (nbBits > 0);
+ }
+}
+
FORCE_INLINE_TEMPLATE void
-HUF_encodeSymbol(BIT_CStream_t* bitCPtr, U32 symbol, const HUF_CElt* CTable)
+HUF_encodeSymbol(HUF_CStream_t* bitCPtr, U32 symbol, const HUF_CElt* CTable, int idx, int fast)
{
- BIT_addBitsFast(bitCPtr, CTable[symbol].val, CTable[symbol].nbBits);
+ HUF_addBits(bitCPtr, CTable[symbol], idx, fast);
}
-#define HUF_FLUSHBITS(s) BIT_flushBits(s)
+FORCE_INLINE_TEMPLATE void
+HUF_compress1X_usingCTable_internal_body_loop(HUF_CStream_t* bitC,
+ const BYTE* ip, size_t srcSize,
+ const HUF_CElt* ct,
+ int kUnroll, int kFastFlush, int kLastFast)
+{
+ /* Join to kUnroll */
+ int n = (int)srcSize;
+ int rem = n % kUnroll;
+ if (rem > 0) {
+ for (; rem > 0; --rem) {
+ HUF_encodeSymbol(bitC, ip[--n], ct, 0, /* fast */ 0);
+ }
+ HUF_flushBits(bitC, kFastFlush);
+ }
+ assert(n % kUnroll == 0);
+
+ /* Join to 2 * kUnroll */
+ if (n % (2 * kUnroll)) {
+ int u;
+ for (u = 1; u < kUnroll; ++u) {
+ HUF_encodeSymbol(bitC, ip[n - u], ct, 0, 1);
+ }
+ HUF_encodeSymbol(bitC, ip[n - kUnroll], ct, 0, kLastFast);
+ HUF_flushBits(bitC, kFastFlush);
+ n -= kUnroll;
+ }
+ assert(n % (2 * kUnroll) == 0);
-#define HUF_FLUSHBITS_1(stream) \
- if (sizeof((stream)->bitContainer)*8 < HUF_TABLELOG_MAX*2+7) HUF_FLUSHBITS(stream)
+ for (; n>0; n-= 2 * kUnroll) {
+ /* Encode kUnroll symbols into the bitstream @ index 0. */
+ int u;
+ for (u = 1; u < kUnroll; ++u) {
+ HUF_encodeSymbol(bitC, ip[n - u], ct, /* idx */ 0, /* fast */ 1);
+ }
+ HUF_encodeSymbol(bitC, ip[n - kUnroll], ct, /* idx */ 0, /* fast */ kLastFast);
+ HUF_flushBits(bitC, kFastFlush);
+ /* Encode kUnroll symbols into the bitstream @ index 1.
+ * This allows us to start filling the bit container
+ * without any data dependencies.
+ */
+ HUF_zeroIndex1(bitC);
+ for (u = 1; u < kUnroll; ++u) {
+ HUF_encodeSymbol(bitC, ip[n - kUnroll - u], ct, /* idx */ 1, /* fast */ 1);
+ }
+ HUF_encodeSymbol(bitC, ip[n - kUnroll - kUnroll], ct, /* idx */ 1, /* fast */ kLastFast);
+ /* Merge bitstream @ index 1 into the bitstream @ index 0 */
+ HUF_mergeIndex1(bitC);
+ HUF_flushBits(bitC, kFastFlush);
+ }
+ assert(n == 0);
+
+}
+
+/**
+ * Returns a tight upper bound on the output space needed by Huffman
+ * with 8 bytes buffer to handle over-writes. If the output is at least
+ * this large we don't need to do bounds checks during Huffman encoding.
+ */
+static size_t HUF_tightCompressBound(size_t srcSize, size_t tableLog)
+{
+ return ((srcSize * tableLog) >> 3) + 8;
+}
-#define HUF_FLUSHBITS_2(stream) \
- if (sizeof((stream)->bitContainer)*8 < HUF_TABLELOG_MAX*4+7) HUF_FLUSHBITS(stream)
FORCE_INLINE_TEMPLATE size_t
HUF_compress1X_usingCTable_internal_body(void* dst, size_t dstSize,
const void* src, size_t srcSize,
const HUF_CElt* CTable)
{
+ U32 const tableLog = (U32)CTable[0];
+ HUF_CElt const* ct = CTable + 1;
const BYTE* ip = (const BYTE*) src;
BYTE* const ostart = (BYTE*)dst;
BYTE* const oend = ostart + dstSize;
BYTE* op = ostart;
- size_t n;
- BIT_CStream_t bitC;
+ HUF_CStream_t bitC;
/* init */
if (dstSize < 8) return 0; /* not enough space to compress */
- { size_t const initErr = BIT_initCStream(&bitC, op, (size_t)(oend-op));
+ { size_t const initErr = HUF_initCStream(&bitC, op, (size_t)(oend-op));
if (HUF_isError(initErr)) return 0; }
- n = srcSize & ~3; /* join to mod 4 */
- switch (srcSize & 3)
- {
- case 3 : HUF_encodeSymbol(&bitC, ip[n+ 2], CTable);
- HUF_FLUSHBITS_2(&bitC);
- /* fall-through */
- case 2 : HUF_encodeSymbol(&bitC, ip[n+ 1], CTable);
- HUF_FLUSHBITS_1(&bitC);
- /* fall-through */
- case 1 : HUF_encodeSymbol(&bitC, ip[n+ 0], CTable);
- HUF_FLUSHBITS(&bitC);
- /* fall-through */
- case 0 : /* fall-through */
- default: break;
- }
-
- for (; n>0; n-=4) { /* note : n&3==0 at this stage */
- HUF_encodeSymbol(&bitC, ip[n- 1], CTable);
- HUF_FLUSHBITS_1(&bitC);
- HUF_encodeSymbol(&bitC, ip[n- 2], CTable);
- HUF_FLUSHBITS_2(&bitC);
- HUF_encodeSymbol(&bitC, ip[n- 3], CTable);
- HUF_FLUSHBITS_1(&bitC);
- HUF_encodeSymbol(&bitC, ip[n- 4], CTable);
- HUF_FLUSHBITS(&bitC);
+ if (dstSize < HUF_tightCompressBound(srcSize, (size_t)tableLog) || tableLog > 11)
+ HUF_compress1X_usingCTable_internal_body_loop(&bitC, ip, srcSize, ct, /* kUnroll */ MEM_32bits() ? 2 : 4, /* kFast */ 0, /* kLastFast */ 0);
+ else {
+ if (MEM_32bits()) {
+ switch (tableLog) {
+ case 11:
+ HUF_compress1X_usingCTable_internal_body_loop(&bitC, ip, srcSize, ct, /* kUnroll */ 2, /* kFastFlush */ 1, /* kLastFast */ 0);
+ break;
+ case 10:
+ case 9:
+ case 8:
+ HUF_compress1X_usingCTable_internal_body_loop(&bitC, ip, srcSize, ct, /* kUnroll */ 2, /* kFastFlush */ 1, /* kLastFast */ 1);
+ break;
+ case 7:
+ default:
+ HUF_compress1X_usingCTable_internal_body_loop(&bitC, ip, srcSize, ct, /* kUnroll */ 3, /* kFastFlush */ 1, /* kLastFast */ 1);
+ break;
+ }
+ } else {
+ switch (tableLog) {
+ case 11:
+ HUF_compress1X_usingCTable_internal_body_loop(&bitC, ip, srcSize, ct, /* kUnroll */ 5, /* kFastFlush */ 1, /* kLastFast */ 0);
+ break;
+ case 10:
+ HUF_compress1X_usingCTable_internal_body_loop(&bitC, ip, srcSize, ct, /* kUnroll */ 5, /* kFastFlush */ 1, /* kLastFast */ 1);
+ break;
+ case 9:
+ HUF_compress1X_usingCTable_internal_body_loop(&bitC, ip, srcSize, ct, /* kUnroll */ 6, /* kFastFlush */ 1, /* kLastFast */ 0);
+ break;
+ case 8:
+ HUF_compress1X_usingCTable_internal_body_loop(&bitC, ip, srcSize, ct, /* kUnroll */ 7, /* kFastFlush */ 1, /* kLastFast */ 0);
+ break;
+ case 7:
+ HUF_compress1X_usingCTable_internal_body_loop(&bitC, ip, srcSize, ct, /* kUnroll */ 8, /* kFastFlush */ 1, /* kLastFast */ 0);
+ break;
+ case 6:
+ default:
+ HUF_compress1X_usingCTable_internal_body_loop(&bitC, ip, srcSize, ct, /* kUnroll */ 9, /* kFastFlush */ 1, /* kLastFast */ 1);
+ break;
+ }
+ }
}
+ assert(bitC.ptr <= bitC.endPtr);
- return BIT_closeCStream(&bitC);
+ return HUF_closeCStream(&bitC);
}
#if DYNAMIC_BMI2
return HUF_compress1X_usingCTable_internal(dst, dstSize, src, srcSize, CTable, /* bmi2 */ 0);
}
-
static size_t
HUF_compress4X_usingCTable_internal(void* dst, size_t dstSize,
const void* src, size_t srcSize,
typedef struct {
unsigned count[HUF_SYMBOLVALUE_MAX + 1];
- HUF_CElt CTable[HUF_SYMBOLVALUE_MAX + 1];
+ HUF_CElt CTable[HUF_CTABLE_SIZE_ST(HUF_SYMBOLVALUE_MAX)];
union {
HUF_buildCTable_wksp_tables buildCTable_wksp;
HUF_WriteCTableWksp writeCTable_wksp;
+ U32 hist_wksp[HIST_WKSP_SIZE_U32];
} wksps;
} HUF_compress_tables_t;
/* HUF_compress_internal() :
* `workSpace_align4` must be aligned on 4-bytes boundaries,
- * and occupies the same space as a table of HUF_WORKSPACE_SIZE_U32 unsigned */
+ * and occupies the same space as a table of HUF_WORKSPACE_SIZE_U64 unsigned */
static size_t
HUF_compress_internal (void* dst, size_t dstSize,
const void* src, size_t srcSize,
unsigned maxSymbolValue, unsigned huffLog,
HUF_nbStreams_e nbStreams,
- void* workSpace_align4, size_t wkspSize,
+ void* workSpace, size_t wkspSize,
HUF_CElt* oldHufTable, HUF_repeat* repeat, int preferRepeat,
const int bmi2, unsigned suspectUncompressible)
{
- HUF_compress_tables_t* const table = (HUF_compress_tables_t*)workSpace_align4;
+ HUF_compress_tables_t* const table = (HUF_compress_tables_t*)HUF_alignUpWorkspace(workSpace, &wkspSize, sizeof(size_t));
BYTE* const ostart = (BYTE*)dst;
BYTE* const oend = ostart + dstSize;
BYTE* op = ostart;
- HUF_STATIC_ASSERT(sizeof(*table) <= HUF_WORKSPACE_SIZE);
- assert(((size_t)workSpace_align4 & 3) == 0); /* must be aligned on 4-bytes boundaries */
+ HUF_STATIC_ASSERT(sizeof(*table) + HUF_WORKSPACE_MAX_ALIGNMENT <= HUF_WORKSPACE_SIZE);
/* checks & inits */
- if (wkspSize < HUF_WORKSPACE_SIZE) return ERROR(workSpace_tooSmall);
+ if (wkspSize < sizeof(*table)) return ERROR(workSpace_tooSmall);
if (!srcSize) return 0; /* Uncompressed */
if (!dstSize) return 0; /* cannot fit anything within dst budget */
if (srcSize > HUF_BLOCKSIZE_MAX) return ERROR(srcSize_wrong); /* current block size limit */
}
/* Scan input and build symbol stats */
- { CHECK_V_F(largest, HIST_count_wksp (table->count, &maxSymbolValue, (const BYTE*)src, srcSize, workSpace_align4, wkspSize) );
+ { CHECK_V_F(largest, HIST_count_wksp (table->count, &maxSymbolValue, (const BYTE*)src, srcSize, table->wksps.hist_wksp, sizeof(table->wksps.hist_wksp)) );
if (largest == srcSize) { *ostart = ((const BYTE*)src)[0]; return 1; } /* single symbol, rle */
if (largest <= (srcSize >> 7)+4) return 0; /* heuristic : probably not compressible enough */
}
&table->wksps.buildCTable_wksp, sizeof(table->wksps.buildCTable_wksp));
CHECK_F(maxBits);
huffLog = (U32)maxBits;
- /* Zero unused symbols in CTable, so we can check it for validity */
- ZSTD_memset(table->CTable + (maxSymbolValue + 1), 0,
- sizeof(table->CTable) - ((maxSymbolValue + 1) * sizeof(HUF_CElt)));
+ }
+ /* Zero unused symbols in CTable, so we can check it for validity */
+ {
+ size_t const ctableSize = HUF_CTABLE_SIZE_ST(maxSymbolValue);
+ size_t const unusedSize = sizeof(table->CTable) - ctableSize * sizeof(HUF_CElt);
+ ZSTD_memset(table->CTable + ctableSize, 0, unusedSize);
}
/* Write table description header */
const void* src, size_t srcSize,
unsigned maxSymbolValue, unsigned huffLog)
{
- unsigned workSpace[HUF_WORKSPACE_SIZE_U32];
+ U64 workSpace[HUF_WORKSPACE_SIZE_U64];
return HUF_compress1X_wksp(dst, dstSize, src, srcSize, maxSymbolValue, huffLog, workSpace, sizeof(workSpace));
}
const void* src, size_t srcSize,
unsigned maxSymbolValue, unsigned huffLog)
{
- unsigned workSpace[HUF_WORKSPACE_SIZE_U32];
+ U64 workSpace[HUF_WORKSPACE_SIZE_U64];
return HUF_compress4X_wksp(dst, dstSize, src, srcSize, maxSymbolValue, huffLog, workSpace, sizeof(workSpace));
}
projects / thirdparty / zstd.git / commitdiff
