view tests/test-utils.sh @ 53:944f05e65a58

Fix what is I think an off-by-one in query and sequence searching.

When taking the mean of the N minimum distances, only consider those
distances which are closer than the infinite/uninitialized distance.

(This renders us potentially vulnerable to an internal consistency
horror where we end up trying to divide by zero.  This is unlikely to be
picked up by unit tests, but might well be by random tests if this is in
fact a problem.)

# no shebang line: this file should be sourced by run-test.sh files

trap "exit 1" ERR

if [ -z ${AUDIODB} ]; then
  AUDIODB=../../audioDB
fi

# FIXME: maybe generalize to multiple arguments?  Also, implement it
# properly, rather than just for a few floats that we know how to
# encode.  This might involve writing some C code, as Bash doesn't do
# Floating Point.  (scanf() is probably enough).

floatstring() {
  for arg in "$@"; do
    case ${arg} in
      0)
        printf "\x00\x00\x00\x00\x00\x00\x00\x00";;
      0.5)
        printf "\x00\x00\x00\x00\x00\x00\xe0\x3f";;
      1)
        printf "\x00\x00\x00\x00\x00\x00\xf0\x3f";;
      *)
        echo "bad arg to floatstring(): ${arg}"
        exit 1;;
    esac
  done
}

# FIXME: likewise.  And endianness issues (which are a reflection of
# the endianness of audioDB as of 2007-09-18, unfortunately).

intstring() {
  # works up to 9 for now
  if [ $1 -ge 10 ]; then echo "intstring() arg too large: ${1}"; exit 1; fi
  printf "%b\x00\x00\x00" "\\x${1}"
}