#ifndef MGL_UTF8_H
#define MGL_UTF8_H

#include <stddef.h>
#include <stdint.h>
#include <stdbool.h>

/*
    Returns false on failure. |decoded_codepoint| is set to |str[0]| if size > 0 and |codepoint_length| is set to 1
*/
bool mgl_utf8_decode(const unsigned char *str, size_t size, uint32_t *decoded_codepoint, size_t *codepoint_length);
/*
    |str| should be the start of the utf8 string and |size| is the size of the string.
    Returns the index of the start of the codepoint that starts at or before |offset|,
    or if the string contains invalid utf8 then the index to the invalid character is returned.
    Returns 0 if start of codepoint is not found.
*/
size_t mgl_utf8_get_start_of_codepoint(const unsigned char *str, size_t size, size_t offset);
/* Returns |size| if not found */
size_t mgl_utf8_index_to_offset(const unsigned char *str, size_t size, size_t index);

#endif /* MGL_UTF8_H */