test/ieee754.test

# 2015-11-06
#
# 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 iee754 extension
#

set testdir [file dirname $argv0]
source $testdir/tester.tcl

load_static_extension db ieee754

foreach {id float rep} {
   1       1.0                            1,0
   2       2.0                            2,0
   3       0.5                            1,-1
   4       1.5                            3,-1
   5       0.0                            0,-1075
   6       4.9406564584124654e-324        1,-1074
   7       2.2250738585072009e-308        4503599627370495,-1074
   8       2.2250738585072014e-308        1,-1022
} {
  do_test ieee754-100-$id-1 {
    db eval "SELECT ieee754($float);"
  } "ieee754($rep)"
  do_test ieee754-100-$id-2 {
    db eval "SELECT ieee754($rep)==$float;"
  } {1}
  if {$float!=0.0} {
    do_test ieee754-100-$id-3 {
      db eval "SELECT ieee754(-$float);"
    } "ieee754(-$rep)"
    do_test ieee754-100-$id-4 {
      db eval "SELECT ieee754(-$rep)==-$float;"
    } {1}
  }
}

do_test ieee754-110 {
  string tolower [
    db eval {SELECT ieee754(1,1024), ieee754(4503599627370495,972);}
  ]
} {inf 1.79769313486232e+308}
do_test ieee754-111 {
  string tolower [
    db eval {SELECT ieee754(-1,1024), ieee754(-4503599627370495,972);}
  ]
} {-inf -1.79769313486232e+308}
do_execsql_test ieee754-112 {
  SELECT ieee754(4503599627370495,973) is null;
} {1}

do_execsql_test ieee754-200 {
  SELECT ieee754(0.0), hex(ieee754_to_blob(ieee754(0,-1075)));
} {ieee754(0,-1075) 0000000000000000}

# Special case.  -0.0 is rendered as ieee754(-1,-3071).
#
do_execsql_test ieee754-201 {
  SELECT ieee754(-0.0), hex(ieee754_to_blob(ieee754(-1,-3071)));
} {ieee754(-1,-3071) 8000000000000000}



finish_test