DatabaseProcApplicationCreatedLinks
sybsystemprocssyb_aux_privexor  14 déc. 14Defects Propagation Dependencies

1     
2     /* Sccsid = "%Z% generic/sproc/src/%M% %I% %G%" */
3     
4     
5     create or replace procedure syb_aux_privexor
6         @left_binary varbinary(133), /* left operand for the subtract */
7         @right_binary varbinary(133), /* right operand for the subtract */
8         @col_count smallint, /* number of columns in the table */
9         @result_binary varbinary(133) output /* result of the subtract operation */
10    as
11    
12        declare @loop_count tinyint /* loop count for all 133 bytes in the varbinary */
13        declare @left_opr tinyint /* integer representation of the left operand */
14        declare @right_opr tinyint /* integer representation of the right operand */
15        declare @result_opr tinyint /* result of subtract operation */
16        declare @left_bin varbinary(133) /* expanded with 1's left operand */
17        declare @loop_bound tinyint /* stores the loop upper bound */
18        /*
19        ** initialize the loop_count
20        */
21        select @loop_count = 1
22    
23        /* 
24        ** initialize loop_bound
25        */
26        select @loop_bound = @col_count / 8 + 1
27    
28        /* 
29        ** check for boundary condition. If right operand is 0, there is nothing to subtract
30        */
31        if (@right_binary = 0x00)
32        begin
33            select @result_binary = @left_binary
34            return
35        end
36    
37        /*
38        ** check for boundary condition. If both oerands are equal, the result has to be 0
39        */
40        if ((@left_binary = 0x01) and (@right_binary = 0x01))
41        begin
42            select @result_binary = 0x00
43            return
44        end
45    
46        /* 
47        ** if the left oeprand is 0x01, the right operand can't be 0x01. Now we need to expand
48        ** the left opernad in order to subtract correctly
49        */
50        if (@left_binary = 0x01)
51            exec sybsystemprocs.dbo.syb_aux_expandbitmap @col_count, @left_bin output
52        else
53            select @left_bin = @left_binary
54    
55        /*
56        ** loop for all relevant bytes in the var binary operand 
57        */
58        while (@loop_count <= @loop_bound)
59        begin
60            select @left_opr = convert(tinyint, substring(@left_bin, @loop_count, 1))
61            select @right_opr = convert(tinyint, substring(@right_binary, @loop_count, 1))
62    
63            /* do the binary operation */
64            select @result_opr = @left_opr ^ @right_opr
65            if (@loop_count = 1)
66            begin
67                select @result_binary = convert(binary(1), @result_opr)
68            end
69            else
70            begin
71                select @result_binary = @result_binary + convert(binary(1), @result_opr)
72            end
73    
74            select @loop_count = @loop_count + 1
75        end
76    

DEFECTS
 MBLI 3 Integer Value of Binary Literal is Platform Dependant 31
 MBLI 3 Integer Value of Binary Literal is Platform Dependant 40
 MBLI 3 Integer Value of Binary Literal is Platform Dependant 42
 MBLI 3 Integer Value of Binary Literal is Platform Dependant 50
 MNER 3 No Error Check should check return value of exec 51
 MUCO 3 Useless Code Useless Brackets 31
 MUCO 3 Useless Code Useless Brackets 40
 MUCO 3 Useless Code Useless Brackets 50
 MUCO 3 Useless Code Useless Brackets 58
 MUCO 3 Useless Code Useless Brackets 65
 MTR1 2 Metrics: Comments Ratio Comments: 38% 5
 MTR2 2 Metrics: Cyclomatic Complexity Cyclo: 6 = 7dec - 3exi + 2 5
 MTR3 2 Metrics: Query Complexity Complexity: 32 5

DEPENDENCIES
PROCS AND TABLES USED
calls proc sybsystemprocs..syb_aux_expandbitmap  

CALLERS
called by proc sybsystemprocs..sp_aux_computeprivs  
   called by proc sybsystemprocs..sp_table_privileges  
   called by proc sybsystemprocs..sp_column_privileges  
called by proc sybsystemprocs..sp_jdbc_computeprivs  
called by proc sybsystemprocs..sp_changegroup  
called by proc sybsystemprocs..sp_ijdbc_aux_computeprivs