* Includes
**************************************/
#include <stdlib.h> /* malloc */
-#include <stdio.h> /* FILE, fwrite */
+#include <stdio.h> /* FILE, fwrite, fprintf */
#include <string.h> /* memcpy */
-#include "mem.h"
+#include "mem.h" /* U32 */
/*-************************************
for (u=0; u<LTSIZE; ) {
U32 const weight = (U32)((double)(LTSIZE - u) * ld) + 1;
U32 const end = MIN ( u + weight , LTSIZE);
- while (u < end) ldt[u++] = character; // TRACE(" %u(%c)[%02X] ", u, character, character);
+ while (u < end) ldt[u++] = character; // TRACE(" %u(%c)[%02X] ", u, character, character);
character++;
if (character > lastChar) character = firstChar;
}
}
-#define RDG_RAND15BITS ( RDG_rand(seed) & 0x7FFF )
-#define RDG_RANDLENGTH ( (RDG_rand(seed) & 7) ? (RDG_rand(seed) & 0xF) : (RDG_rand(seed) & 0x1FF) + 0xF)
+static U32 RDG_rand15Bits (unsigned* seedPtr)
+{
+ return RDG_rand(seedPtr) & 0x7FFF;
+}
+
+static U32 RDG_randLength(unsigned* seedPtr)
+{
+ if (RDG_rand(seedPtr) & 7)
+ return (RDG_rand(seedPtr) & 0xF);
+ return (RDG_rand(seedPtr) & 0x1FF) + 0xF;
+}
+
void RDG_genBlock(void* buffer, size_t buffSize, size_t prefixSize, double matchProba, const BYTE* ldt, unsigned* seedPtr)
{
- BYTE* buffPtr = (BYTE*)buffer;
- const U32 matchProba32 = (U32)(32768 * matchProba);
+ BYTE* const buffPtr = (BYTE*)buffer;
+ U32 const matchProba32 = (U32)(32768 * matchProba);
size_t pos = prefixSize;
- U32* seed = seedPtr;
U32 prevOffset = 1;
/* special case : sparse content */
while (matchProba >= 1.0) {
- size_t size0 = RDG_rand(seed) & 3;
+ size_t size0 = RDG_rand(seedPtr) & 3;
size0 = (size_t)1 << (16 + size0 * 2);
- size0 += RDG_rand(seed) & (size0-1); /* because size0 is power of 2*/
+ size0 += RDG_rand(seedPtr) & (size0-1); /* because size0 is power of 2*/
if (buffSize < pos + size0) {
memset(buffPtr+pos, 0, buffSize-pos);
return;
}
memset(buffPtr+pos, 0, size0);
pos += size0;
- buffPtr[pos-1] = RDG_genChar(seed, ldt);
+ buffPtr[pos-1] = RDG_genChar(seedPtr, ldt);
continue;
}
/* init */
- if (pos==0) buffPtr[0] = RDG_genChar(seed, ldt), pos=1;
+ if (pos==0) buffPtr[0] = RDG_genChar(seedPtr, ldt), pos=1;
/* Generate compressible data */
while (pos < buffSize) {
/* Select : Literal (char) or Match (within 32K) */
- if (RDG_RAND15BITS < matchProba32) {
+ if (RDG_rand15Bits(seedPtr) < matchProba32) {
/* Copy (within 32K) */
- U32 const length = RDG_RANDLENGTH + 4;
+ U32 const length = RDG_randLength(seedPtr) + 4;
U32 const d = (U32) MIN(pos + length , buffSize);
- U32 const repeatOffset = (RDG_rand(seed) & 15) == 2;
- U32 const randOffset = RDG_RAND15BITS + 1;
+ U32 const repeatOffset = (RDG_rand(seedPtr) & 15) == 2;
+ U32 const randOffset = RDG_rand15Bits(seedPtr) + 1;
U32 const offset = repeatOffset ? prevOffset : (U32) MIN(randOffset , pos);
size_t match = pos - offset;
//TRACE("pos : %u; offset: %u ; length : %u \n", (U32)pos, offset, length);
prevOffset = offset;
} else {
/* Literal (noise) */
- U32 const length = RDG_RANDLENGTH;
+ U32 const length = RDG_randLength(seedPtr);
U32 const d = (U32) MIN(pos + length, buffSize);
- while (pos < d) buffPtr[pos++] = RDG_genChar(seed, ldt);
+ while (pos < d) buffPtr[pos++] = RDG_genChar(seedPtr, ldt);
} }
}
{
size_t const stdBlockSize = 128 KB;
size_t const stdDictSize = 32 KB;
- BYTE* buff = (BYTE*)malloc(stdDictSize + stdBlockSize);
+ BYTE* const buff = (BYTE*)malloc(stdDictSize + stdBlockSize);
U64 total = 0;
BYTE ldt[LTSIZE];