static __forceinline uint32_t utf8_read_increment(const char **data, const char *last)
{
if ((**data & 0x80) == 0 && *data + 1 <= last) // 0xxxxxxx
return *(*data)++;
else if ((**data & 0xE0) == 0xC0 && *data + 2 <= last) // 110xxxxx
{
uint32_t codepoint = 0;
codepoint += LOWBITS(*(*data)++, 5) << 6;
codepoint += LOWBITS(*(*data)++, 6);
return codepoint;
}
else if ((**data & 0xF0) == 0xE0 && *data + 3 <= last) // 1110xxxx
{
uint32_t codepoint = 0;
codepoint += LOWBITS(*(*data)++, 4) << 12;
codepoint += LOWBITS(*(*data)++, 6) << 6;
codepoint += LOWBITS(*(*data)++, 6);
return codepoint;
}
else if ((**data & 0xF8) == 0xF0 && *data + 4 <= last) // 11110xxx
{
uint32_t codepoint = 0;
codepoint += LOWBITS(*(*data)++, 3) << 18;
codepoint += LOWBITS(*(*data)++, 6) << 12;
codepoint += LOWBITS(*(*data)++, 6) << 6;
codepoint += LOWBITS(*(*data)++, 6);
return codepoint;
}
else
return -1;
}
//-------------------------------
void lcd_cmd(int8u_t data, int16u_t loop)
{/* LCD ELEMENTARY COMMAND */
HIGHBITS(data);
LCD_STROBE(0);
LOWBITS(data);
LCD_STROBE(loop); // busy delay
}
void lcd_cmd_native(int8u_t data)
{/* LCD ELEMENTARY COMMAND */
HIGHBITS(data);
LCD_STROBE_native(20);
LOWBITS(data);
LCD_STROBE_native(20); // busy delay
}
//-------------------------------
void lcd_config(int8u_t param)
{/* CONFIGURE THE DISPLAY */
HIGHBITS(param); // 4-bit, two lines, 5x8 pixel
LCD_STROBE(0); // change 8-bit interface to 4-bit interface
LCD_STROBE(0); // init 4-bit interface
LOWBITS(param);
LCD_STROBE(0);
}
uint32_t utf8_decode(const char *data)
{
if ((data[0] & 0x80) == 0)
return (uint32_t)data[0];
else if ((data[0] & 0xE0) == 0xC0)
return (uint32_t)(LOWBITS(data[0], 5) << 6) + LOWBITS(data[1], 6);
else if ((data[0] & 0xF0) == 0xE0)
return (uint32_t)(LOWBITS(data[0], 4) << 12) + (LOWBITS(data[1], 6) << 6) + LOWBITS(data[2], 6);
else if ((data[0] & 0xF8) == 0xF0)
return (uint32_t)(LOWBITS(data[0], 3) << 18) + (LOWBITS(data[1], 6) << 12) + (LOWBITS(data[2], 6) << 6) + LOWBITS(data[3], 6);
else
return -1;
}