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random.c

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6static struct sqlite3PrngType {-
7 unsigned char isInit;-
8 unsigned char i, j;-
9 unsigned char s[256];-
10} sqlite3Prng;-
11-
12-
13-
14-
15void sqlite3_randomness(int N, void *pBuf){-
16 unsigned char t;-
17 unsigned char *zBuf = pBuf;-
18 sqlite3_mutex *mutex;-
19-
20-
21-
22 if( sqlite3_initialize()
sqlite3_initialize()Description
TRUEnever evaluated
FALSEevaluated 2368905 times by 438 tests
Evaluated by:
  • Self test
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  • Self test (120)
  • ...
 ) return;
never executed: return;
0-2368905
23-
24-
25-
26 mutex = sqlite3MutexAlloc(5);-
27-
28-
29 sqlite3_mutex_enter(mutex);-
30 if( N<=0
N<=0Description
TRUEevaluated 1416 times by 438 tests
Evaluated by:
  • Self test
  • Self test (10)
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  • Self test (120)
  • ...
FALSEevaluated 2367489 times by 396 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (104)
  • Self test (105)
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  • ...
 || pBuf==0
pBuf==0Description
TRUEnever evaluated
FALSEevaluated 2367489 times by 396 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (104)
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  • ...
 ){		0-2367489
31 sqlite3Prng.isInit = 0;-
32 sqlite3_mutex_leave(mutex);-
33 return;
executed 1416 times by 438 tests: return;
Executed by:
  • Self test
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  • ...
1416
34 }-
35 if( !sqlite3Prng.isInit
!sqlite3Prng.isInitDescription
TRUEevaluated 1074 times by 396 tests
Evaluated by:
  • Self test
  • Self test (10)
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  • Self test (101)
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  • Self test (119)
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  • Self test (121)
  • Self test (122)
  • ...
FALSEevaluated 2366415 times by 383 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (104)
  • Self test (106)
  • Self test (107)
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  • ...
 ){		1074-2366415
36 int i;-
37 char k[256];-
38 sqlite3Prng.j = 0;-
39 sqlite3Prng.i = 0;-
40 sqlite3OsRandomness(sqlite3_vfs_find(0), 256, k);-
41 for(i=0; i<256
i<256Description
TRUEevaluated 274944 times by 396 tests
Evaluated by:
  • Self test
  • Self test (10)
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  • ...
FALSEevaluated 1074 times by 396 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (104)
  • Self test (105)
  • Self test (106)
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  • ...
; i++){		1074-274944
42 sqlite3Prng.s[i] = (u8)i;-
43 }
executed 274944 times by 396 tests: end of block
Executed by:
  • Self test
  • Self test (10)
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  • ...
274944
44 for(i=0; i<256
i<256Description
TRUEevaluated 274944 times by 396 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (104)
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  • ...
FALSEevaluated 1074 times by 396 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
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  • ...
; i++){		1074-274944
45 sqlite3Prng.j += sqlite3Prng.s[i] + k[i];-
46 t = sqlite3Prng.s[sqlite3Prng.j];-
47 sqlite3Prng.s[sqlite3Prng.j] = sqlite3Prng.s[i];-
48 sqlite3Prng.s[i] = t;-
49 }
executed 274944 times by 396 tests: end of block
Executed by:
  • Self test
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  • ...
274944
50 sqlite3Prng.isInit = 1;-
51 }
executed 1074 times by 396 tests: end of block
Executed by:
  • Self test
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  • ...
1074
52-
53 -
54 ((void) (0))-
55 ;-
56 do{-
57 sqlite3Prng.i++;-
58 t = sqlite3Prng.s[sqlite3Prng.i];-
59 sqlite3Prng.j += t;-
60 sqlite3Prng.s[sqlite3Prng.i] = sqlite3Prng.s[sqlite3Prng.j];-
61 sqlite3Prng.s[sqlite3Prng.j] = t;-
62 t += sqlite3Prng.s[sqlite3Prng.i];-
63 *(zBuf++) = sqlite3Prng.s[t];-
64 }
executed 288366033 times by 396 tests: end of block
Executed by:
  • Self test
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  • ...
while( --
--NDescription
TRUEevaluated 285998544 times by 396 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
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  • Self test (104)
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  • ...
FALSEevaluated 2367489 times by 396 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (104)
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  • ...
N
--NDescription
TRUEevaluated 285998544 times by 396 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (104)
  • Self test (105)
  • Self test (106)
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  • Self test (119)
  • Self test (12)
  • Self test (120)
  • Self test (121)
  • Self test (122)
  • ...
FALSEevaluated 2367489 times by 396 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
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  • Self test (115)
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  • Self test (118)
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  • Self test (12)
  • Self test (120)
  • Self test (121)
  • Self test (122)
  • ...
 );		2367489-288366033
65 sqlite3_mutex_leave(mutex);-
66}
executed 2367489 times by 396 tests: end of block
Executed by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (104)
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  • Self test (12)
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  • Self test (121)
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  • ...
2367489
67static struct sqlite3PrngType sqlite3SavedPrng;-
68void sqlite3PrngSaveState(void){-
69 memcpy(-
70 &sqlite3SavedPrng,-
71 &sqlite3Prng,-
72 sizeof(sqlite3Prng)-
73 );-
74}
executed 5 times by 1 test: end of block
Executed by:
  • Self test (438)
5
75void sqlite3PrngRestoreState(void){-
76 memcpy(-
77 &sqlite3Prng,-
78 &sqlite3SavedPrng,-
79 sizeof(sqlite3Prng)-
80 );-
81}
executed 927 times by 1 test: end of block
Executed by:
  • Self test (438)
927
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