Marlin_Firmware/Marlin/src/lcd/fontutils.h

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/**
* @file fontutils.h
* @brief help functions for font and char
* @author Yunhui Fu (yhfudev@gmail.com)
* @version 1.0
* @date 2016-08-19
* @copyright GPL/BSD
*/
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#pragma once
#include <stdlib.h>
#include <Arduino.h>
#include "../core/macros.h"
#include <stddef.h> // wchar_t
#include <stdint.h> // uint32_t
// read a byte from ROM or RAM
typedef uint8_t (*read_byte_cb_t)(uint8_t * str);
uint8_t read_byte_ram(uint8_t * str);
uint8_t read_byte_rom(uint8_t * str);
// there's overflow of the wchar_t due to the 2-byte size in Arduino
// sizeof(wchar_t)=2; sizeof(size_t)=2; sizeof(uint32_t)=4;
// sizeof(int)=2; sizeof(long)=4; sizeof(unsigned)=2;
//#undef wchar_t
#define wchar_t uint32_t
//typedef uint32_t wchar_t;
#ifndef NUM_ARRAY
#define NUM_ARRAY(a) (sizeof(a)/sizeof((a)[0]))
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#endif
typedef uint16_t pixel_len_t;
#define PIXEL_LEN_NOLIMIT ((pixel_len_t)(-1))
/* Perform binary search */
typedef int (* pf_bsearch_cb_comp_t)(void *userdata, size_t idx, void * data_pin); /*"data_list[idx] - *data_pin"*/
int pf_bsearch_r(void *userdata, size_t num_data, pf_bsearch_cb_comp_t cb_comp, void *data_pinpoint, size_t *ret_idx);
/* Get the character, decoding multibyte UTF8 characters and returning a pointer to the start of the next UTF8 character */
uint8_t* get_utf8_value_cb(uint8_t *pstart, read_byte_cb_t cb_read_byte, wchar_t *pval);
/* Returns lenght of string in CHARACTERS, NOT BYTES */
uint8_t utf8_strlen(const char *pstart);
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uint8_t utf8_strlen_P(PGM_P pstart);