---
name: "al_ustr_prev_get"
section: "3alleg5"
platform: "linux"
package: "allegro5-doc"
version: "2:5.2.10.1+dfsg-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/al_ustr_prev_get/3alleg5"
---

# al\_ustr\_prev\_get(3alleg5)

Allegro 5 API

## NAME

al\_ustr\_prev\_get - Allegro 5 API

## SYNOPSIS

-

  ```
  #include <allegro5/allegro.h>
  int32_t al_ustr_prev_get(const ALLEGRO_USTR *us, int *pos)
  ```

## DESCRIPTION

Find the beginning of a code point before byte offset `*pos`, then return it. Note this performs a *pre-increment*.

On success returns the code point value. If `pos` was out of bounds (e.g. past the end of the string), return -1. On an error, such as an invalid byte sequence, return -2. As with al\_ustr\_prev(3alleg5), invalid byte sequences may be skipped while advancing.

## SEE ALSO

al\_ustr\_get\_next(3alleg5)