/* c is a multibyte control character. It displays as ^@, ^?, or ^[ch],
* where ch is (c + 64). We return that multibyte character. If crep
* is an invalid multibyte sequence, it will be replaced with Unicode
* 0xFFFD (Replacement Character). */
char *control_mbrep(const char *c, char *crep, int *crep_len)
{
assert(c != NULL && crep != NULL && crep_len != NULL);
#ifdef ENABLE_UTF8
if (use_utf8) {
wchar_t wc;
if (mbtowc(&wc, c, MB_CUR_MAX) < 0) {
mbtowc_reset();
*crep_len = bad_mbchar_len;
strncpy(crep, bad_mbchar, *crep_len);
} else {
*crep_len = wctomb(crep, control_wrep(wc));
if (*crep_len < 0) {
wctomb_reset();
*crep_len = 0;
}
}
} else {
#endif
*crep_len = 1;
*crep = control_rep(*c);
#ifdef ENABLE_UTF8
}
#endif
return crep;
}
/* Return the visible representation of multibyte control character c. */
char control_mbrep(const char *c, bool isdata)
{
/* An embedded newline is an encoded NUL if it is data. */
if (*c == '\n' && (isdata || as_an_at))
return '@';
#ifdef ENABLE_UTF8
if (use_utf8) {
if ((unsigned char)c[0] < 128)
return control_rep(c[0]);
else
return control_rep(c[1]);
} else
#endif
return control_rep(*c);
}
