Function concat

include/init/string.h:78–89

static t_string fast_concat;

static size_t concat(char *dest, const char *src)
{
	if(!dest || !src) return 0;

	if(fast_concat.str != dest)
	{
		fast_concat.str = dest;
		fast_concat.size = 0;
	}

	return _concat(&fast_concat, src) - dest;
}

static int concat2(char *dest, const char *src1, const char *src2)
{