#pragma once
#include <cstdint>
#include <string_view>
#include <vector>
#include <string>
// UTF-8 parsing utilities for streaming-aware unicode support
struct utf8_parse_result {
uint32_t codepoint; // Decoded codepoint (only valid if status == SUCCESS)
size_t bytes_consumed; // How many bytes this codepoint uses (1-4)
enum status { SUCCESS, INCOMPLETE, INVALID } status;
utf8_parse_result(enum status s, uint32_t cp = 0, size_t bytes = 0)
: codepoint(cp), bytes_consumed(bytes), status(s) {}
};
// Determine the expected length of a UTF-8 sequence from its first byte
// Returns 0 for invalid first bytes
size_t common_utf8_sequence_length(unsigned char first_byte);
// Check if a string ends with a complete UTF-8 sequence.
bool common_utf8_is_complete(const std::string & s);
// Parse a single UTF-8 codepoint from input
utf8_parse_result common_parse_utf8_codepoint(std::string_view input, size_t offset);
std::string common_unicode_cpts_to_utf8(const std::vector<uint32_t> & cps);
std::string common_unicode_cpt_to_utf8(uint32_t cpt);