wasCSharpSQLite – Blame information for rev 1
?pathlinks?
Rev | Author | Line No. | Line |
---|---|---|---|
1 | office | 1 | # 2010 June 03
|
2 | #
|
||
3 | # The author disclaims copyright to this source code. In place of
|
||
4 | # a legal notice, here is a blessing:
|
||
5 | #
|
||
6 | # May you do good and not evil.
|
||
7 | # May you find forgiveness for yourself and forgive others.
|
||
8 | # May you share freely, never taking more than you give.
|
||
9 | #
|
||
10 | #***********************************************************************
|
||
11 | #
|
||
12 | # This file contains common code used by many different malloc tests
|
||
13 | # within the test suite.
|
||
14 | #
|
||
15 | |||
16 | proc wal_file_size {nFrame pgsz} { |
||
17 | expr {32 + ($pgsz+24)*$nFrame} |
||
18 | } |
||
19 | |||
20 | proc wal_frame_count {zFile pgsz} { |
||
21 | if {[file exists $zFile]==0} { return 0 } |
||
22 | set f [file size $zFile] |
||
23 | if {$f < 32} { return 0 } |
||
24 | expr {($f - 32) / ($pgsz+24)} |
||
25 | } |
||
26 | |||
27 | proc wal_cksum_intlist {ckv1 ckv2 intlist} { |
||
28 | upvar $ckv1 c1 |
||
29 | upvar $ckv2 c2 |
||
30 | foreach {v1 v2} $intlist { |
||
31 | set c1 [expr {($c1 + $v1 + $c2)&0xFFFFFFFF}] |
||
32 | set c2 [expr {($c2 + $v2 + $c1)&0xFFFFFFFF}] |
||
33 | } |
||
34 | } |
||
35 | |||
36 | |||
37 | # This proc calculates checksums in the same way as those used by SQLite
|
||
38 | # in WAL files. If the $endian argument is "big", then checksums are
|
||
39 | # calculated by interpreting data as an array of big-endian integers. If
|
||
40 | # it is "little", data is interpreted as an array of little-endian integers.
|
||
41 | #
|
||
42 | proc wal_cksum {endian ckv1 ckv2 blob} { |
||
43 | upvar $ckv1 c1 |
||
44 | upvar $ckv2 c2 |
||
45 | |||
46 | if {$endian!="big" && $endian!="little"} { |
||
47 | return -error "Bad value \"$endian\" - must be \"big\" or \"little\"" |
||
48 | } |
||
49 | set scanpattern I* |
||
50 | if {$endian == "little"} { set scanpattern i* } |
||
51 | |||
52 | binary scan $blob $scanpattern values |
||
53 | wal_cksum_intlist c1 c2 $values |
||
54 | } |
||
55 | |||
56 | proc wal_set_walhdr {filename {intlist {}}} { |
||
57 | if {[llength $intlist]==6} { |
||
58 | set blob [binary format I6 $intlist] |
||
59 | set endian little |
||
60 | if {[lindex $intlist 0] & 0x00000001} { set endian big } |
||
61 | set c1 0 |
||
62 | set c2 0 |
||
63 | wal_cksum $endian c1 c2 $blob |
||
64 | append blob [binary format II $c1 $c2] |
||
65 | |||
66 | set fd [open $filename r+] |
||
67 | fconfigure $fd -translation binary |
||
68 | fconfigure $fd -encoding binary |
||
69 | seek $fd 0 |
||
70 | puts -nonewline $fd $blob |
||
71 | close $fd |
||
72 | } |
||
73 | |||
74 | set fd [open $filename] |
||
75 | fconfigure $fd -translation binary |
||
76 | fconfigure $fd -encoding binary |
||
77 | set blob [read $fd 24] |
||
78 | close $fd |
||
79 | |||
80 | binary scan $blob I6 ints |
||
81 | set ints |
||
82 | } |
||
83 | |||
84 | proc wal_fix_walindex_cksum {hdrvar} { |
||
85 | upvar $hdrvar hdr |
||
86 | set c1 0 |
||
87 | set c2 0 |
||
88 | wal_cksum_intlist c1 c2 [lrange $hdr 0 9] |
||
89 | lset hdr 10 $c1 |
||
90 | lset hdr 11 $c2 |
||
91 | } |
||
92 | |||
93 |