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