# This goes hand in hand with the "exec 9>&2;" in Makefile.am's
# TESTS_ENVIRONMENT definition.
stderr_fileno_=9
+
+# Like printf with a single argument, but that argument must be a
+# sequence of four-byte strings \xHH where each H is a hexadecimal byte.
+hex_printf_()
+{
+ local octal_fmt=$(printf '\\%o' \
+ $(printf '%s\n' "$1" \
+ | sed 's,\\x\([0-9abcdefABCDEF][0-9abcdefABCDEF]\), 0x\1,g'))
+ printf "$octal_fmt"
+}