catatsuy / u8p

A Go Utility for Precise UTF-8 String Truncation

u8p

Overview

The u8p package provides functionality for working with UTF-8 encoded strings in Go. It includes a key function, Find, which is designed to find the index of the leading UTF-8 byte in a given string.

Function Find

• Signature: Find(a string, l int) (int, error)
• Parameters:
  • a: The string to be analyzed.
  • l: An integer representing the length of a substring to be considered.
• Return:
  • int: The index of the leading UTF-8 byte in the string.
  • error: An error if the input does not meet certain conditions.
• Description: Find searches for the leading UTF-8 byte in the last l bytes of the string a. If a is empty, it returns 0 and no error. It returns an error if l is less than or equal to 3, or if the length of a is less than l. It also returns an error if a valid UTF-8 leading byte is not found.

Example Usage

Refer to example_test.go for example usage of the Find function.