generated from nhcarrigan/template
23 lines
790 B
C++
23 lines
790 B
C++
#pragma once
|
|
|
|
#include <cstdint>
|
|
#include <string_view>
|
|
|
|
// 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 utf8_sequence_length(unsigned char first_byte);
|
|
|
|
// Parse a single UTF-8 codepoint from input
|
|
utf8_parse_result parse_utf8_codepoint(std::string_view input, size_t offset);
|