BSD has some minor improvements to libc. There's also glib. Generally though, C is just a terrible language to do anything other than write extremely low level

BSD has some minor improvements to libc. There's also glib. Generally though, C is just a terrible language to do anything other than write extremely low level routines in. You should probably just never use strtok() and go straight to something like Ragel or re2c for building high performance tokenizers... then call those from a higher level language.