doc::unibi\_add\_ext\_bool(3) unibilium doc::unibi\_add\_ext\_bool(3)

# [NAME](#NAME)

unibi\_add\_ext\_bool, unibi\_add\_ext\_num, unibi\_add\_ext\_str - add extended capabilities to a terminal object

# [SYNOPSIS](#SYNOPSIS)

```
 #include <unibilium.h>
 size_t unibi_add_ext_bool(unibi_term *ut, const char *t, int b);
 size_t unibi_add_ext_num(unibi_term *ut, const char *t, int v);
 size_t unibi_add_ext_str(unibi_term *ut, const char *t, const char *s);
```

# [DESCRIPTION](#DESCRIPTION)

Add an extended boolean, numeric, or string capability with the specified name and value.

Note that these functions simply store any pointers they are given. They will not free *t* or *s* or copy any strings.

# [RETURN VALUE](#RETURN_VALUE)

The return value is the index of the new capability, which can be used in [**unibi\_get\_ext\_bool**(3)](/man/os/unibilium/unibi_get_ext_bool.3), [**unibi\_set\_ext\_bool**(3)](/man/os/unibilium/unibi_set_ext_bool.3), etc. If an error occurs, "SIZE\_MAX" is returned.

# [SEE ALSO](#SEE_ALSO)

[**unibilium.h**(3)](/man/os/unibilium/unibilium.h.3), [**unibi\_del\_ext\_bool**(3)](/man/os/unibilium/unibi_del_ext_bool.3), [**unibi\_del\_ext\_num**(3)](/man/os/unibilium/unibi_del_ext_num.3), [**unibi\_del\_ext\_str**(3)](/man/os/unibilium/unibi_del_ext_str.3)

2026-08-30 unibilium-2.1.4

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Document: unibi_add_ext_bool(3) from unibilium 2.1.4-r0 (Chainguard OS)
Source: https://github.com/neovim/unibilium