61 lines
1.6 KiB
Plaintext
61 lines
1.6 KiB
Plaintext
# 2012 June 18
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#
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# The author disclaims copyright to this source code. In place of
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# a legal notice, here is a blessing:
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#
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# May you do good and not evil.
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# May you find forgiveness for yourself and forgive others.
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# May you share freely, never taking more than you give.
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#
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#***********************************************************************
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#
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# Tests of the sqlite3AtoF() function.
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#
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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if {![info exists __GNUC__]} {
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finish_test
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return
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}
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expr srand(1)
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for {set i 1} {$i<20000} {incr i} {
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set pow [expr {int((rand()-0.5)*100)}]
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set x [expr {pow((rand()-0.5)*2*rand(),$pow)}]
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set xf [format %.32e $x]
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# Verify that text->real conversions get exactly same ieee754 floating-
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# point value in SQLite as they do in TCL.
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#
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do_test atof1-1.$i.1 {
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set y [db eval "SELECT $xf=\$x"]
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if {!$y} {
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puts -nonewline \173[db eval "SELECT real2hex($xf), real2hex(\$x)"]\175
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db eval "SELECT $xf+0.0 AS a, \$x AS b" {
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puts [format "\n%.60e\n%.60e\n%.60e" $x $a $b]
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}
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}
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set y
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} {1}
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# Verify that round-trip real->text->real conversions using the quote()
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# function preserve the bits of the numeric value exactly.
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#
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do_test atof1-1.$i.2 {
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set y [db eval {SELECT $x=CAST(quote($x) AS real)}]
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if {!$y} {
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db eval {SELECT real2hex($x) a, real2hex(CAST(quote($x) AS real)) b} {}
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puts "\nIN: $a $xf"
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puts [format {QUOTE: %16s %s} {} [db eval {SELECT quote($x)}]]
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db eval {SELECT CAST(quote($x) AS real) c} {}
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puts "OUT: $b [format %.32e $c]"
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}
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set y
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} {1}
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}
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finish_test
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