void
scsipi_strvis(u_char *dst, int dlen, const u_char *src, int slen)
{
/* Trim leading and trailing blanks and NULs. */
while (slen > 0 && STRVIS_ISWHITE(src[0]))
++src, --slen;
while (slen > 0 && STRVIS_ISWHITE(src[slen - 1]))
--slen;
while (slen > 0) {
if (*src < 0x20 || *src >= 0x80) {
/* non-printable characters */
dlen -= 4;
if (dlen < 1)
break;
*dst++ = '\\';
*dst++ = ((*src & 0300) >> 6) + '0';
*dst++ = ((*src & 0070) >> 3) + '0';
*dst++ = ((*src & 0007) >> 0) + '0';
} else if (*src == '\\') {
int
strnvisx(char *dst, size_t dlen, const char *src, size_t slen, int flags)
{
if (dlen == 0)
return -1;
if (flags & VIS_TRIM) {
/* Trim leading and trailing blanks and NULs. */
while (slen > 0 && STRVIS_ISWHITE(src[0]))
++src, --slen;
while (slen > 0 && STRVIS_ISWHITE(src[slen - 1]))
--slen;
}
while (slen > 0) {
if ((flags & VIS_SAFE) && (*src < 0x20 || (*src & 0x80))) {
/* non-printable characters */
if (dlen < 4)
goto out;
dlen -= 4;
*dst++ = '\\';
*dst++ = ((*src & 0300) >> 6) + '0';
*dst++ = ((*src & 0070) >> 3) + '0';
*dst++ = ((*src & 0007) >> 0) + '0';
} else if (*src == '\\') {
/* quote characters */
if (dlen < 2)
goto out;
dlen -= 2;
*dst++ = '\\';
*dst++ = '\\';
} else {
/* normal characters */
if (dlen < 1)
goto out;
*dst++ = *src;
}
++src, --slen;
}
