3 # The author disclaims copyright to this source code. In place of
4 # a legal notice, here is a blessing:
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.
10 #***********************************************************************
12 # Tests of the sqlite3AtoF() function.
15 set testdir [file dirname $argv0]
16 source $testdir/tester.tcl
18 if {$::longdouble_size<=8} {
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 $x]
29 # Verify that text->real conversions get exactly same ieee754 floating-
30 # point value in SQLite as they do in TCL.
32 do_test atof1-1.$i.1 {
33 set y [db eval "SELECT $xf=\$x"]
35 puts -nonewline \173[db eval "SELECT real2hex($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 $b]
43 # Verify that round-trip real->text->real conversions using the quote()
44 # function preserve the bits of the numeric value exactly.
46 do_test atof1-1.$i.2 {
47 set y [db eval {SELECT $x=CAST(quote($x) AS real)}]
49 db eval {SELECT real2hex($x) a, real2hex(CAST(quote($x) AS real)) b} {}
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]"