libustr-dev - 1.0.4-6.1 main

ustr (Micro string library) is a string API for C. It has tiny overhead over
just plain strdup(), is much safer, is easier to use, is faster for many
operations, can be used with read-only or automatically allocated data. You
don't even need to link to the library to use it (so there are no
dependencies).
.
This package contains header files and static library needed to compile code
that uses ustr.