wasCSharpSQLite – Blame information for rev 1
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| 1 | office | 1 | # 2010 June 03
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| 2 | #
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| 3 | # The author disclaims copyright to this source code. In place of
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| 4 | # a legal notice, here is a blessing:
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| 5 | #
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| 6 | # May you do good and not evil.
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| 7 | # May you find forgiveness for yourself and forgive others.
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| 8 | # May you share freely, never taking more than you give.
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| 9 | #
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| 10 | #***********************************************************************
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| 11 | #
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| 12 | # This file contains common code used by many different malloc tests
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| 13 | # within the test suite.
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| 14 | #
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| 15 | |||
| 16 | proc wal_file_size {nFrame pgsz} { |
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| 17 | expr {32 + ($pgsz+24)*$nFrame} |
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| 18 | } |
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| 19 | |||
| 20 | proc wal_frame_count {zFile pgsz} { |
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| 21 | if {[file exists $zFile]==0} { return 0 } |
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| 22 | set f [file size $zFile] |
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| 23 | if {$f < 32} { return 0 } |
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| 24 | expr {($f - 32) / ($pgsz+24)} |
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| 25 | } |
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| 26 | |||
| 27 | proc wal_cksum_intlist {ckv1 ckv2 intlist} { |
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| 28 | upvar $ckv1 c1 |
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| 29 | upvar $ckv2 c2 |
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| 30 | foreach {v1 v2} $intlist { |
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| 31 | set c1 [expr {($c1 + $v1 + $c2)&0xFFFFFFFF}] |
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| 32 | set c2 [expr {($c2 + $v2 + $c1)&0xFFFFFFFF}] |
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| 33 | } |
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| 34 | } |
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| 35 | |||
| 36 | |||
| 37 | # This proc calculates checksums in the same way as those used by SQLite
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| 38 | # in WAL files. If the $endian argument is "big", then checksums are
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| 39 | # calculated by interpreting data as an array of big-endian integers. If
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| 40 | # it is "little", data is interpreted as an array of little-endian integers.
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| 41 | #
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| 42 | proc wal_cksum {endian ckv1 ckv2 blob} { |
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| 43 | upvar $ckv1 c1 |
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| 44 | upvar $ckv2 c2 |
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| 45 | |||
| 46 | if {$endian!="big" && $endian!="little"} { |
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| 47 | return -error "Bad value \"$endian\" - must be \"big\" or \"little\"" |
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| 48 | } |
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| 49 | set scanpattern I* |
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| 50 | if {$endian == "little"} { set scanpattern i* } |
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| 51 | |||
| 52 | binary scan $blob $scanpattern values |
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| 53 | wal_cksum_intlist c1 c2 $values |
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| 54 | } |
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| 55 | |||
| 56 | proc wal_set_walhdr {filename {intlist {}}} { |
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| 57 | if {[llength $intlist]==6} { |
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| 58 | set blob [binary format I6 $intlist] |
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| 59 | set endian little |
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| 60 | if {[lindex $intlist 0] & 0x00000001} { set endian big } |
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| 61 | set c1 0 |
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| 62 | set c2 0 |
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| 63 | wal_cksum $endian c1 c2 $blob |
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| 64 | append blob [binary format II $c1 $c2] |
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| 65 | |||
| 66 | set fd [open $filename r+] |
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| 67 | fconfigure $fd -translation binary |
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| 68 | fconfigure $fd -encoding binary |
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| 69 | seek $fd 0 |
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| 70 | puts -nonewline $fd $blob |
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| 71 | close $fd |
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| 72 | } |
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| 73 | |||
| 74 | set fd [open $filename] |
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| 75 | fconfigure $fd -translation binary |
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| 76 | fconfigure $fd -encoding binary |
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| 77 | set blob [read $fd 24] |
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| 78 | close $fd |
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| 79 | |||
| 80 | binary scan $blob I6 ints |
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| 81 | set ints |
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| 82 | } |
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| 83 | |||
| 84 | proc wal_fix_walindex_cksum {hdrvar} { |
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| 85 | upvar $hdrvar hdr |
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| 86 | set c1 0 |
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| 87 | set c2 0 |
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| 88 | wal_cksum_intlist c1 c2 [lrange $hdr 0 9] |
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| 89 | lset hdr 10 $c1 |
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| 90 | lset hdr 11 $c2 |
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| 91 | } |
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| 92 | |||
| 93 |