WhyCan Forum(哇酷开发者社区)

/* ▀▄█ */
#define UTF8_EMPTY(inv)			do{ if(inv) { *p++ = 0xe2; *p++ = 0x96; *p++ = 0x88; } else { *p++ = 0x20; } } while(0)
#define UTF8_TOPHALF(inv)		do{ if(inv) { *p++ = 0xe2; *p++ = 0x96; *p++ = 0x84; } else { *p++ = 0xe2; *p++ = 0x96; *p++ = 0x80; } } while(0)
#define UTF8_BOTTOMHALF(inv)	do{ if(inv) { *p++ = 0xe2; *p++ = 0x96; *p++ = 0x80; } else { *p++ = 0xe2; *p++ = 0x96; *p++ = 0x84; } } while(0)
#define UTF8_FULL(inv)			do{ if(inv) { *p++ = 0x20; } else { *p++ = 0xe2; *p++ = 0x96; *p++ = 0x88; } } while(0)
#define UTF8_NEWLINE()			do{ *p++ = '\r'; *p++ = '\n'; } while(0)
#define UTF8_END()				do{ *p++ = '\0'; } while(0)

char * qrcgen_tostring(const char * txt, int invert)
{
	uint8_t qrc[QRCGEN_BUFFER_LEN_MAX];
	uint8_t tmp[QRCGEN_BUFFER_LEN_MAX];
	int qrs, x, y, i;
	int t, b;
	char *s, *p;

	if(qrcgen_encode_text(txt, tmp, qrc, QRCGEN_ECC_MEDIUM, QRCGEN_VERSION_MIN, QRCGEN_VERSION_MAX, QRCGEN_MASK_AUTO, 1))
	{
		qrs = qrcgen_get_size(qrc);
		if(qrs > 0)
		{
			p = s = malloc(((qrs + 4) * 3 + 2) * (qrs / 2 + 1 + 2) + 1);
			if(s)
			{
				for(i = 0; i < qrs + 4; ++i)
					UTF8_EMPTY(invert);
				UTF8_NEWLINE();
				for(y = 0; y < qrs; y += 2)
				{
					UTF8_EMPTY(invert);
					UTF8_EMPTY(invert);
					for(x = 0; x < qrs; x++)
					{
						t = qrcgen_get_pixel(qrc, x, y);
						b = 0;
						if(y + 1 < qrs)
							b = qrcgen_get_pixel(qrc, x, y + 1);
						if(t)
						{
							if(b)
								UTF8_FULL(invert);
							else
								UTF8_TOPHALF(invert);
						}
						else
						{
							if(b)
								UTF8_BOTTOMHALF(invert);
							else
								UTF8_EMPTY(invert);
						}
					}
					UTF8_EMPTY(invert);
					UTF8_EMPTY(invert);
					UTF8_NEWLINE();
				}
				for(i = 0; i < qrs + 4; i++)
					UTF8_EMPTY(invert);
				UTF8_NEWLINE();
				UTF8_END();
				return s;
			}
		}
	}
	return NULL;
}