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#ifndef _SCDOC_UNICODE_H
#define _SCDOC_UNICODE_H
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
// Technically UTF-8 supports up to 6 byte codepoints, but Unicode itself
// doesn't really bother with more than 4.
#define UTF8_MAX_SIZE 4
#define UTF8_INVALID 0x80
/**
* Grabs the next UTF-8 character and advances the string pointer
*/
uint32_t utf8_decode(const char **str);
/**
* Encodes a character as UTF-8 and returns the length of that character.
*/
size_t utf8_encode(char *str, uint32_t ch);
/**
* Returns the size of the next UTF-8 character
*/
int utf8_size(const char *str);
/**
* Returns the size of a UTF-8 character
*/
size_t utf8_chsize(uint32_t ch);
/**
* Reads and returns the next character from the file.
*/
uint32_t utf8_fgetch(FILE *f);
/**
* Writes this character to the file and returns the number of bytes written.
*/
size_t utf8_fputch(FILE *f, uint32_t ch);
#endif