DeforaNetworks/zzuf
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* Set minimal fuzzing ratio to 0.000000001% (less than one bit changed on

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a whole DVD).
This commit is contained in:
Sam Hocevar 2008-04-12 07:44:34 +00:00 committed by sam
parent 81d43c778d
commit db40102a66
2 changed files with 5 additions and 4 deletions
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4
src/fuzz.c
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@ -111,8 +111,8 @@ void _zz_fuzz(int fd, volatile uint8_t *buf, int64_t len)
memset(fuzz->data, 0, CHUNKBYTES); memset(fuzz->data, 0, CHUNKBYTES);
/* Add some random dithering to handle ratio < 1.0/CHUNKBYTES */ /* Add some random dithering to handle ratio < 1.0/CHUNKBYTES */
todo = (int)((fuzz->ratio * (8 * CHUNKBYTES * 1000) todo = (int)((fuzz->ratio * (8 * CHUNKBYTES) * 1000000.0
+ _zz_rand(1000)) / 1000.0); + _zz_rand(1000000)) / 1000000.0);
while(todo--) while(todo--)
{ {
unsigned int idx = _zz_rand(CHUNKBYTES); unsigned int idx = _zz_rand(CHUNKBYTES);

5
src/libzzuf.h
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@ -25,9 +25,10 @@
/* Default seed is 0. Why not? */ /* Default seed is 0. Why not? */
#define DEFAULT_SEED 0 #define DEFAULT_SEED 0
/* The default fuzzing ratio is, arbitrarily, 0.4% */ /* The default fuzzing ratio is, arbitrarily, 0.4%. The minimal fuzzing
* ratio is 0.000000001% (less than one bit changed on a whole DVD). */
#define DEFAULT_RATIO 0.004 #define DEFAULT_RATIO 0.004
#define MIN_RATIO 0.00001 #define MIN_RATIO 0.00000000001
#define MAX_RATIO 5.0 #define MAX_RATIO 5.0
struct fuzz struct fuzz