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| 1 # 2012 June 18 | |
| 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 # Tests of the sqlite3AtoF() function. | |
| 13 # | |
| 14 | |
| 15 set testdir [file dirname $argv0] | |
| 16 source $testdir/tester.tcl | |
| 17 | |
| 18 if {$::longdouble_size<=8} { | |
| 19 finish_test | |
| 20 return | |
| 21 } | |
| 22 | |
| 23 expr srand(1) | |
| 24 for {set i 1} {$i<20000} {incr i} { | |
| 25 set pow [expr {int((rand()-0.5)*100)}] | |
| 26 set x [expr {pow((rand()-0.5)*2*rand(),$pow)}] | |
| 27 set xf [format %.32e $x] | |
| 28 | |
| 29 # Verify that text->real conversions get exactly same ieee754 floating- | |
| 30 # point value in SQLite as they do in TCL. | |
| 31 # | |
| 32 do_test atof1-1.$i.1 { | |
| 33 set y [db eval "SELECT $xf=\$x"] | |
| 34 if {!$y} { | |
| 35 puts -nonewline \173[db eval "SELECT real2hex($xf), real2hex(\$x)"]\175 | |
| 36 db eval "SELECT $xf+0.0 AS a, \$x AS b" { | |
| 37 puts [format "\n%.60e\n%.60e\n%.60e" $x $a $b] | |
| 38 } | |
| 39 } | |
| 40 set y | |
| 41 } {1} | |
| 42 | |
| 43 # Verify that round-trip real->text->real conversions using the quote() | |
| 44 # function preserve the bits of the numeric value exactly. | |
| 45 # | |
| 46 do_test atof1-1.$i.2 { | |
| 47 set y [db eval {SELECT $x=CAST(quote($x) AS real)}] | |
| 48 if {!$y} { | |
| 49 db eval {SELECT real2hex($x) a, real2hex(CAST(quote($x) AS real)) b} {} | |
| 50 puts "\nIN: $a $xf" | |
| 51 puts [format {QUOTE: %16s %s} {} [db eval {SELECT quote($x)}]] | |
| 52 db eval {SELECT CAST(quote($x) AS real) c} {} | |
| 53 puts "OUT: $b [format %.32e $c]" | |
| 54 } | |
| 55 set y | |
| 56 } {1} | |
| 57 } | |
| 58 | |
| 59 | |
| 60 finish_test | |
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