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added : repcode generation to datagen

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This commit is contained in:
Yann Collet 2015-11-20 12:00:25 +01:00
parent dc5e3e96f8
commit 6a11a69b15
1 changed files with 8 additions and 5 deletions
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13
programs/datagen.c
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@ -138,6 +138,7 @@ void RDG_genBlock(void* buffer, size_t buffSize, size_t prefixSize, double match
const U32 matchProba32 = (U32)(32768 * matchProba); const U32 matchProba32 = (U32)(32768 * matchProba);
size_t pos = prefixSize; size_t pos = prefixSize;
U32* seed = seedPtr; U32* seed = seedPtr;
U32 prevOffset = 1;
/* special case : sparse content */ /* special case : sparse content */
while (matchProba >= 1.0) while (matchProba >= 1.0)
@ -167,14 +168,16 @@ void RDG_genBlock(void* buffer, size_t buffSize, size_t prefixSize, double match
{ {
/* Copy (within 32K) */ /* Copy (within 32K) */
size_t match; size_t match;
size_t d; size_t length = RDG_RANDLENGTH + 4;
int length = RDG_RANDLENGTH + 4;
U32 offset = RDG_RAND15BITS + 1; U32 offset = RDG_RAND15BITS + 1;
U32 repeatOffset = (RDG_rand(seed) & 15) == 2;
if (repeatOffset) offset = prevOffset;
if (offset > pos) offset = (U32)pos; if (offset > pos) offset = (U32)pos;
match = pos - offset; match = pos - offset;
d = pos + length; if (length > buffSize-pos) length = buffSize-pos;
if (d > buffSize) d = buffSize; memcpy(buffPtr+pos, buffPtr+match, length);
while (pos < d) buffPtr[pos++] = buffPtr[match++]; pos += length;
prevOffset = offset;
} }
else else
{ {