move szmul to common.h

simplify parsing of numbers

add assertion that triggers when cx_array_copy() stops working for NULL arrays

simplify parsing of array and object elements

treat integers and doubles both as JSON numbers

remove single-member structs

fix test function names not in line with naming convention

(0) -300 -100 -30 -10 -7 +7 +10 +30 tip

mercurial