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