Compare C strings lexicographically.
Preconditions: cstr1 != null && cstr2 != null
t { assert(cmpCStrings("ab".ptr, "ab".ptr) == 0); assert(cmpCStrings("ab".ptr, "abc".ptr) < 0); assert(cmpCStrings("abc".ptr, "ab".ptr) > 0
See Implementation
Compare C strings lexicographically.
Preconditions: cstr1 != null && cstr2 != null