parse_entry.c

ncurses 库 可能有用酒用 没用就算了 我觉得还可以用

    }
    _nc_wrap_entry(entryp, FALSE);

    return (OK);
}

NCURSES_EXPORT(int)
_nc_capcmp(const char *s, const char *t)
/* compare two string capabilities, stripping out padding */
{
    if (!s && !t)
	return (0);
    else if (!s || !t)
	return (1);

    for (;;) {
	if (s[0] == '$' && s[1] == '<') {
	    for (s += 2;; s++)
		if (!(isdigit(UChar(*s))
		      || *s == '.'
		      || *s == '*'
		      || *s == '/'
		      || *s == '>'))
		    break;
	}

	if (t[0] == '$' && t[1] == '<') {
	    for (t += 2;; t++)
		if (!(isdigit(UChar(*t))
		      || *t == '.'
		      || *t == '*'
		      || *t == '/'
		      || *t == '>'))
		    break;
	}

	/* we've now pushed s and t past any padding they were pointing at */

	if (*s == '\0' && *t == '\0')
	    return (0);

	if (*s != *t)
	    return (*t - *s);

	/* else *s == *t but one is not NUL, so continue */
	s++, t++;
    }
}

static void
append_acs0(string_desc * dst, int code, int src)
{
    if (src != 0) {
	char temp[3];
	temp[0] = code;
	temp[1] = src;
	temp[2] = 0;
	_nc_safe_strcat(dst, temp);
    }
}

static void
append_acs(string_desc * dst, int code, char *src)
{
    if (src != 0 && strlen(src) == 1) {
	append_acs0(dst, code, *src);
    }
}

/*
 * The ko capability, if present, consists of a comma-separated capability
 * list.  For each capability, we may assume there is a keycap that sends the
 * string which is the value of that capability.
 */
typedef struct {
    const char *from;
    const char *to;
} assoc;
static assoc const ko_xlate[] =
{
    {"al", "kil1"},		/* insert line key  -> KEY_IL    */
    {"bt", "kcbt"},		/* back tab         -> KEY_BTAB  */
    {"cd", "ked"},		/* clear-to-eos key -> KEY_EOL   */
    {"ce", "kel"},		/* clear-to-eol key -> KEY_EOS   */
    {"cl", "kclr"},		/* clear key        -> KEY_CLEAR */
    {"ct", "tbc"},		/* clear all tabs   -> KEY_CATAB */
    {"dc", "kdch1"},		/* delete char      -> KEY_DC    */
    {"dl", "kdl1"},		/* delete line      -> KEY_DL    */
    {"do", "kcud1"},		/* down key         -> KEY_DOWN  */
    {"ei", "krmir"},		/* exit insert key  -> KEY_EIC   */
    {"ho", "khome"},		/* home key         -> KEY_HOME  */
    {"ic", "kich1"},		/* insert char key  -> KEY_IC    */
    {"im", "kIC"},		/* insert-mode key  -> KEY_SIC   */
    {"le", "kcub1"},		/* le key           -> KEY_LEFT  */
    {"nd", "kcuf1"},		/* nd key           -> KEY_RIGHT */
    {"nl", "kent"},		/* new line key     -> KEY_ENTER */
    {"st", "khts"},		/* set-tab key      -> KEY_STAB  */
    {"ta", CANCELLED_STRING},
    {"up", "kcuu1"},		/* up-arrow key     -> KEY_UP    */
    {(char *) 0, (char *) 0},
};

/*
 * This routine fills in string caps that either had defaults under
 * termcap or can be manufactured from obsolete termcap capabilities.
 * It was lifted from Ross Ridge's mytinfo package.
 */

static const char C_CR[] = "\r";
static const char C_LF[] = "\n";
static const char C_BS[] = "\b";
static const char C_HT[] = "\t";

/*
 * Note that WANTED and PRESENT are not simple inverses!  If a capability
 * has been explicitly cancelled, it's not considered WANTED.
 */
#define WANTED(s)	((s) == ABSENT_STRING)
#define PRESENT(s)	(((s) != ABSENT_STRING) && ((s) != CANCELLED_STRING))

/*
 * This bit of legerdemain turns all the terminfo variable names into
 * references to locations in the arrays Booleans, Numbers, and Strings ---
 * precisely what's needed.
 */

#undef CUR
#define CUR tp->

static void
postprocess_termcap(TERMTYPE *tp, bool has_base)
{
    char buf[MAX_LINE * 2 + 2];
    string_desc result;

    /*
     * TERMCAP DEFAULTS AND OBSOLETE-CAPABILITY TRANSLATIONS
     *
     * This first part of the code is the functional inverse of the
     * fragment in capdefaults.c.
     * ----------------------------------------------------------------------
     */

    /* if there was a tc entry, assume we picked up defaults via that */
    if (!has_base) {
	if (WANTED(init_3string) && termcap_init2)
	    init_3string = _nc_save_str(termcap_init2);

	if (WANTED(reset_2string) && termcap_reset)
	    reset_2string = _nc_save_str(termcap_reset);

	if (WANTED(carriage_return)) {
	    if (carriage_return_delay > 0) {
		sprintf(buf, "%s$<%d>", C_CR, carriage_return_delay);
		carriage_return = _nc_save_str(buf);
	    } else
		carriage_return = _nc_save_str(C_CR);
	}
	if (WANTED(cursor_left)) {
	    if (backspace_delay > 0) {
		sprintf(buf, "%s$<%d>", C_BS, backspace_delay);
		cursor_left = _nc_save_str(buf);
	    } else if (backspaces_with_bs == 1)
		cursor_left = _nc_save_str(C_BS);
	    else if (PRESENT(backspace_if_not_bs))
		cursor_left = backspace_if_not_bs;
	}
	/* vi doesn't use "do", but it does seems to use nl (or '\n') instead */
	if (WANTED(cursor_down)) {
	    if (PRESENT(linefeed_if_not_lf))
		cursor_down = linefeed_if_not_lf;
	    else if (linefeed_is_newline != 1) {
		if (new_line_delay > 0) {
		    sprintf(buf, "%s$<%d>", C_LF, new_line_delay);
		    cursor_down = _nc_save_str(buf);
		} else
		    cursor_down = _nc_save_str(C_LF);
	    }
	}
	if (WANTED(scroll_forward) && crt_no_scrolling != 1) {
	    if (PRESENT(linefeed_if_not_lf))
		cursor_down = linefeed_if_not_lf;
	    else if (linefeed_is_newline != 1) {
		if (new_line_delay > 0) {
		    sprintf(buf, "%s$<%d>", C_LF, new_line_delay);
		    scroll_forward = _nc_save_str(buf);
		} else
		    scroll_forward = _nc_save_str(C_LF);
	    }
	}
	if (WANTED(newline)) {
	    if (linefeed_is_newline == 1) {
		if (new_line_delay > 0) {
		    sprintf(buf, "%s$<%d>", C_LF, new_line_delay);
		    newline = _nc_save_str(buf);
		} else
		    newline = _nc_save_str(C_LF);
	    } else if (PRESENT(carriage_return) && PRESENT(scroll_forward)) {
		_nc_str_init(&result, buf, sizeof(buf));
		if (_nc_safe_strcat(&result, carriage_return)
		    && _nc_safe_strcat(&result, scroll_forward))
		    newline = _nc_save_str(buf);
	    } else if (PRESENT(carriage_return) && PRESENT(cursor_down)) {
		_nc_str_init(&result, buf, sizeof(buf));
		if (_nc_safe_strcat(&result, carriage_return)
		    && _nc_safe_strcat(&result, cursor_down))
		    newline = _nc_save_str(buf);
	    }
	}
    }

    /*
     * Inverse of capdefaults.c code ends here.
     * ----------------------------------------------------------------------
     *
     * TERMCAP-TO TERMINFO MAPPINGS FOR SOURCE TRANSLATION
     *
     * These translations will *not* be inverted by tgetent().
     */

    if (!has_base) {
	/*
	 * We wait until now to decide if we've got a working cr because even
	 * one that doesn't work can be used for newline. Unfortunately the
	 * space allocated for it is wasted.
	 */
	if (return_does_clr_eol == 1 || no_correctly_working_cr == 1)
	    carriage_return = ABSENT_STRING;

	/*
	 * Supposedly most termcap entries have ta now and '\t' is no longer a
	 * default, but it doesn't seem to be true...
	 */
	if (WANTED(tab)) {
	    if (horizontal_tab_delay > 0) {
		sprintf(buf, "%s$<%d>", C_HT, horizontal_tab_delay);
		tab = _nc_save_str(buf);
	    } else
		tab = _nc_save_str(C_HT);
	}
	if (init_tabs == ABSENT_NUMERIC && has_hardware_tabs == TRUE)
	    init_tabs = 8;

	/*
	 * Assume we can beep with ^G unless we're given bl@.
	 */
	if (WANTED(bell))
	    bell = _nc_save_str("\007");
    }

    /*
     * Translate the old termcap :pt: capability to it#8 + ht=\t
     */
    if (has_hardware_tabs == TRUE) {
	if (init_tabs != 8 && init_tabs != ABSENT_NUMERIC)
	    _nc_warning("hardware tabs with a width other than 8: %d", init_tabs);
	else {
	    if (tab && _nc_capcmp(tab, C_HT))
		_nc_warning("hardware tabs with a non-^I tab string %s",
			    _nc_visbuf(tab));
	    else {
		if (WANTED(tab))
		    tab = _nc_save_str(C_HT);
		init_tabs = 8;
	    }
	}
    }
    /*
     * Now translate the ko capability, if there is one.  This
     * isn't from mytinfo...
     */
    if (PRESENT(other_non_function_keys)) {
	char *base = other_non_function_keys;
	char *bp, *cp, *dp;
	struct name_table_entry const *from_ptr;
	struct name_table_entry const *to_ptr;
	assoc const *ap;
	char buf2[MAX_TERMINFO_LENGTH];
	bool foundim;

	/* we're going to use this for a special case later */
	dp = strchr(other_non_function_keys, 'i');
	foundim = (dp != 0) && (dp[1] == 'm');

	/* look at each comma-separated capability in the ko string... */
	for (base = other_non_function_keys;
	     (cp = strchr(base, ',')) != 0;
	     base = cp + 1) {
	    size_t len = cp - base;

	    for (ap = ko_xlate; ap->from; ap++)
		if (len == strlen(ap->from)
		    && strncmp(ap->from, base, len) == 0)
		    break;
	    if (!ap->to) {
		_nc_warning("unknown capability `%.*s' in ko string",
			    (int) len, base);
		continue;
	    } else if (ap->to == CANCELLED_STRING)	/* ignore it */
		continue;

	    /* now we know we found a match in ko_table, so... */

	    from_ptr = _nc_find_entry(ap->from, _nc_cap_hash_table);
	    to_ptr = _nc_find_entry(ap->to, _nc_info_hash_table);

	    if (!from_ptr || !to_ptr)	/* should never happen! */
		_nc_err_abort("ko translation table is invalid, I give up");

	    if (WANTED(tp->Strings[from_ptr->nte_index])) {
		_nc_warning("no value for ko capability %s", ap->from);
		continue;
	    }

	    if (tp->Strings[to_ptr->nte_index]) {
		/* There's no point in warning about it if it's the same
		 * string; that's just an inefficiency.
		 */
		if (strcmp(
			      tp->Strings[from_ptr->nte_index],
			      tp->Strings[to_ptr->nte_index]) != 0)
		    _nc_warning("%s (%s) already has an explicit value %s, ignoring ko",
				ap->to, ap->from,
				_nc_visbuf(tp->Strings[to_ptr->nte_index]));
		continue;
	    }

	    /*
	     * The magic moment -- copy the mapped key string over,
	     * stripping out padding.
	     */
	    for (dp = buf2, bp = tp->Strings[from_ptr->nte_index]; *bp; bp++) {
		if (bp[0] == '$' && bp[1] == '<') {
		    while (*bp && *bp != '>') {
			++bp;
		    }
		} else
		    *dp++ = *bp;
	    }
	    *dp++ = '\0';

	    tp->Strings[to_ptr->nte_index] = _nc_save_str(buf2);
	}

	/*
	 * Note: ko=im and ko=ic both want to grab the `Insert'
	 * keycap.  There's a kich1 but no ksmir, so the ic capability
	 * got mapped to kich1 and im to kIC to avoid a collision.
	 * If the description has im but not ic, hack kIC back to kich1.
	 */
	if (foundim && WANTED(key_ic) && key_sic) {
	    key_ic = key_sic;
	    key_sic = ABSENT_STRING;
	}
    }

    if (!has_base) {
	if (!hard_copy) {
	    if (WANTED(key_backspace))
		key_backspace = _nc_save_str(C_BS);
	    if (WANTED(key_left))
		key_left = _nc_save_str(C_BS);
	    if (WANTED(key_down))
		key_down = _nc_save_str(C_LF);
	}
    }

    /*
     * Translate XENIX forms characters.
     */
    if (PRESENT(acs_ulcorner) ||
	PRESENT(acs_llcorner) ||
	PRESENT(acs_urcorner) ||
	PRESENT(acs_lrcorner) ||
	PRESENT(acs_ltee) ||
	PRESENT(acs_rtee) ||
	PRESENT(acs_btee) ||
	PRESENT(acs_ttee) ||
	PRESENT(acs_hline) ||
	PRESENT(acs_vline) ||
	PRESENT(acs_plus)) {
	char buf2[MAX_TERMCAP_LENGTH];

	_nc_str_init(&result, buf2, sizeof(buf2));
	_nc_safe_strcat(&result, acs_chars);

	append_acs(&result, 'j', acs_lrcorner);
	append_acs(&result, 'k', acs_urcorner);
	append_acs(&result, 'l', acs_ulcorner);
	append_acs(&result, 'm', acs_llcorner);
	append_acs(&result, 'n', acs_plus);
	append_acs(&result, 'q', acs_hline);
	append_acs(&result, 't', acs_ltee);
	append_acs(&result, 'u', acs_rtee);
	append_acs(&result, 'v', acs_btee);
	append_acs(&result, 'w', acs_ttee);
	append_acs(&result, 'x', acs_vline);

	if (buf2[0]) {
	    acs_chars = _nc_save_str(buf2);
	    _nc_warning("acsc string synthesized from XENIX capabilities");
	}
    } else if (acs_chars == 0
	       && enter_alt_charset_mode != 0
	       && exit_alt_charset_mode != 0) {
	acs_chars = _nc_save_str(VT_ACSC);
    }
}

static void
postprocess_terminfo(TERMTYPE *tp)
{
    /*
     * TERMINFO-TO-TERMINFO MAPPINGS FOR SOURCE TRANSLATION
     * ----------------------------------------------------------------------
     */

    /*
     * Translate AIX forms characters.
     */
    if (PRESENT(box_chars_1)) {
	char buf2[MAX_TERMCAP_LENGTH];
	string_desc result;

	_nc_str_init(&result, buf2, sizeof(buf2));
	_nc_safe_strcat(&result, acs_chars);

	append_acs0(&result, 'l', box_chars_1[0]);	/* ACS_ULCORNER */
	append_acs0(&result, 'q', box_chars_1[1]);	/* ACS_HLINE */
	append_acs0(&result, 'k', box_chars_1[2]);	/* ACS_URCORNER */
	append_acs0(&result, 'x', box_chars_1[3]);	/* ACS_VLINE */
	append_acs0(&result, 'j', box_chars_1[4]);	/* ACS_LRCORNER */
	append_acs0(&result, 'm', box_chars_1[5]);	/* ACS_LLCORNER */
	append_acs0(&result, 'w', box_chars_1[6]);	/* ACS_TTEE */
	append_acs0(&result, 'u', box_chars_1[7]);	/* ACS_RTEE */
	append_acs0(&result, 'v', box_chars_1[8]);	/* ACS_BTEE */
	append_acs0(&result, 't', box_chars_1[9]);	/* ACS_LTEE */
	append_acs0(&result, 'n', box_chars_1[10]);	/* ACS_PLUS */

	if (buf2[0]) {
	    acs_chars = _nc_save_str(buf2);
	    _nc_warning("acsc string synthesized from AIX capabilities");
	    box_chars_1 = ABSENT_STRING;
	}
    }
    /*
     * ----------------------------------------------------------------------
     */
}

/*
 * Do a linear search through the terminfo tables to find a given full-name.
 * We don't expect to do this often, so there's no hashing function.
 *
 * In effect, this scans through the 3 lists of full-names, and looks them
 * up in _nc_info_table, which is organized so that the nte_index fields are
 * sorted, but the nte_type fields are not necessarily grouped together.
 */
static struct name_table_entry const *
lookup_fullname(const char *find)
{
    int state = -1;

    for (;;) {
	int count = 0;
	NCURSES_CONST char *const *names;

	switch (++state) {
	case BOOLEAN:
	    names = boolfnames;
	    break;
	case STRING:
	    names = strfnames;
	    break;
	case NUMBER:
	    names = numfnames;
	    break;
	default:
	    return NOTFOUND;
	}

	for (count = 0; names[count] != 0; count++) {
	    if (!strcmp(names[count], find)) {
		struct name_table_entry const *entry_ptr = _nc_get_table(FALSE);
		while (entry_ptr->nte_type != state
		       || entry_ptr->nte_index != count)
		    entry_ptr++;
		return entry_ptr;
	    }
	}
    }
}

/* parse_entry.c ends here */