48 lines
1.5 KiB
C
48 lines
1.5 KiB
C
/**
|
|
* @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
|
|
*/
|
|
#ifndef _FONT_UTILS_H
|
|
#define _FONT_UTILS_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]))
|
|
#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);
|
|
uint8_t utf8_strlen_P(const char *pstart);
|
|
|
|
#endif // _FONT_UTILS_H
|