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 $testdir/tester.tcl
18 set mxpow [expr {[use_long_double]?100:35}]
20 for {set i 1} {$i<20000} {incr i} {
21 set pow [expr {int((rand()-0.5)*$mxpow)}]
22 set x [expr {pow((rand()-0.5)*2*rand(),$pow)}]
23 set xf [format %.32e $x]
25 # Verify that text->real conversions get exactly same ieee754 floating-
26 # point value in SQLite as they do in TCL.
28 do_test atof1-1.$i.1 {
29 set y [db eval "SELECT $xf=\$x"]
31 puts -nonewline \173[db eval "SELECT real2hex($xf), real2hex(\$x)"]\175
32 db eval "SELECT $xf+0.0 AS a, \$x AS b" {
33 puts [format "\n%.60e\n%.60e\n%.60e" $x $a $b]
39 # Verify that round-trip real->text->real conversions using the quote()
40 # function preserve the bits of the numeric value exactly.
42 do_test atof1-1.$i.2 {
43 set y [db eval {SELECT $x=CAST(quote($x) AS real)}]
45 db eval {SELECT real2hex($x) a, real2hex(CAST(quote($x) AS real)) b} {}
48 puts "[format {!SCALE: %17s 1 23456789 123456789 123456789} {}]"
50 puts "[format {!SCALE: %16s 1 23456789 123456789 123456789} {}]"
53 puts [format {!QUOTE: %16s %s} {} [db eval {SELECT quote($x)}]]
54 db eval {SELECT CAST(quote($x) AS real) c} {}
55 puts "!OUT: $b [format %.32e $c]"
61 # 2020-01-08 ticket 9eda2697f5cc1aba
62 # When running sqlite3AtoF() on a blob with an odd number of bytes using
63 # UTF16, ignore the last byte so that the string has an integer number of
67 do_execsql_test atof1-2.10 {
68 PRAGMA encoding = 'UTF16be';
69 CREATE TABLE t1(a, b);
70 INSERT INTO t1(rowid,a) VALUES (1,x'00'),(2,3);
71 SELECT substr(a,',') is true FROM t1 ORDER BY rowid;
73 do_execsql_test atof1-2.20 {
74 SELECT substr(a,',') is true FROM t1 ORDER BY rowid DESC;
76 do_execsql_test atof1-2.30 {
77 CREATE INDEX i1 ON t1(a);
78 SELECT count(*) FROM t1 WHERE substr(a,',');
80 # 2020-08-27 OSSFuzz find related to the above.
81 do_execsql_test atof1-2.40 {
82 SELECT randomblob(0) - 1;