3 ms·

Looks like the array lookup isn't exclusive to glibc. Illumos: https://github.com/illumos/illumos-gate/blob/9ecd05bdc59e4a1091c51ce68cce2028d5ba6fd1/usr/src/li

by floxy 5y ago

Looks like the array lookup isn't exclusive to glibc. Illumos: https://github.com/illumos/illumos-gate/blob/9ecd05bdc59e4a1091c51ce68cce2028d5ba6fd1/usr/src/lib/libc/port/locale/isdigit.c https://github.com/illumos/illumos-gate/blob/9ecd05bdc59e4a1... ...although there is a "sensible" version at: https://github.com/illumos/illumos-gate/blob/9ecd05bdc59e4a1091c51ce68cce2028d5ba6fd1/usr/src/uts/common/sys/ctype.h https://github.com/illumos/illumos-gate/blob/9ecd05bdc59e4a1... FreeBSD: You have to chase it through "__sbistype" to "__sbmaskrune". https://cgit.freebsd.org/src/tree/lib/libc/locale/isctype.c https://cgit.freebsd.org/src/tree/lib/libc/locale/isctype.c https://cgit.freebsd.org/src/tree/include/_ctype.h https://cgit.freebsd.org/src/tree/include/_ctype.h

moonchild 5y ago
Illumos also has ridiculously huge (but sanely-behaving, thankfully) strings functions, because somebody met jump tables once and thought they were cool. https://github.com/illumos/illumos-gate/blob/master/usr/src/lib/libc/amd64/gen/memset.s https://github.com/illumos/illumos-gate/blob/master/usr/src/... e.g.
masklinn 5y ago
A table-based implementation, aside from the convenience of being declarative, is also natural if not outright necessary for locales support.