add szmul.c to msvc project

fix wrong "variant" of zero/NULL/false

add explicit casts to silence warnings

fix compilation for compilers which don't set __WORDSIZE

add check for C23 compatibility

add sys/types.h to the common includes to fix a problem with ssize_t

increase test coverage

(0) -1000 -300 -100 -30 -10 -7 +7 +10 +30 tip

mercurial