Function xo_printable

tools/libxo/libxo/libxo.c:496–526

#define XO_SMBUFSZ 128

static const char *
xo_printable (const char *str)
{
    static THREAD_LOCAL(char) bufset[XO_NUMBUFS][XO_SMBUFSZ];
    static THREAD_LOCAL(int) bufnum = 0;

    if (str == NULL)
	return "";

    if (++bufnum == XO_NUMBUFS)
	bufnum = 0;

    char *res = bufset[bufnum], *cp, *ep;

    for (cp = res, ep = res + XO_SMBUFSZ - 1; *str && cp < ep; cp++, str++) {
	if (*str == '\n') {
	    *cp++ = '\\';
	    *cp = 'n';
	} else if (*str == '\r') {
	    *cp++ = '\\';
	    *cp = 'r';
	} else if (*str == '\"') {
	    *cp++ = '\\';
	    *cp = '"';
	} else 
	    *cp = *str;
    }

    *cp = '\0';
    return res;
}

static int
xo_depth_check (xo_handle_t *xop, int depth)