Unget a key string
int SLang_ungetkey_string (unsigned char *buf, unsigned int n)
The SLang_ungetkey_string function may be used to push the
n characters pointed to by buf onto the buffered input
stream that SLgetkey uses. If there is not enough room for
the characters, -1 is returned and none are buffered. Otherwise,
it returns zero.
The difference between SLang_buffer_keystring and
SLang_ungetkey_string is that the SLang_buffer_keystring
appends the characters to the end of the getkey buffer, whereas
SLang_ungetkey_string inserts the characters at the beginning
of the input buffer.
SLang_ungetkey, SLang_getkey