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/* $OpenBSD: lib_tgoto.c,v 1.7 2023/10/17 09:52:09 nicm Exp $ */
/****************************************************************************
* Copyright 2018-2020,2023 Thomas E. Dickey *
* Copyright 2000-2008,2012 Free Software Foundation, Inc. *
* *
* Permission is hereby granted, free of charge, to any person obtaining a *
* copy of this software and associated documentation files (the *
* "Software"), to deal in the Software without restriction, including *
* without limitation the rights to use, copy, modify, merge, publish, *
* distribute, distribute with modifications, sublicense, and/or sell *
* copies of the Software, and to permit persons to whom the Software is *
* furnished to do so, subject to the following conditions: *
* *
* The above copyright notice and this permission notice shall be included *
* in all copies or substantial portions of the Software. *
* *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
* IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
* THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
* *
* Except as contained in this notice, the name(s) of the above copyright *
* holders shall not be used in advertising or otherwise to promote the *
* sale, use or other dealings in this Software without prior written *
* authorization. *
****************************************************************************/
/****************************************************************************
* Author: Thomas E. Dickey *
****************************************************************************/
#include <curses.priv.h>
#include <ctype.h>
#include <termcap.h>
MODULE_ID("$Id: lib_tgoto.c,v 1.7 2023/10/17 09:52:09 nicm Exp $")
#if !PURE_TERMINFO
static bool
is_termcap(const char *string)
{
bool result = TRUE;
if (string == 0 || *string == '\0') {
result = FALSE; /* tparm() handles empty strings */
} else {
while ((*string != '\0') && result) {
if (*string == '%') {
switch (*++string) {
case 'p':
result = FALSE;
break;
case '\0':
string--;
break;
}
} else if (string[0] == '$' && string[1] == '<') {
result = FALSE;
}
string++;
}
}
return result;
}
static char *
tgoto_internal(const char *string, int x, int y)
{
static char *result;
static size_t length;
int swap_arg;
int param[3];
size_t used = 0;
size_t need = 10;
int *value = param;
bool need_BC = FALSE;
if (BC)
need += strlen(BC);
param[0] = y;
param[1] = x;
param[2] = 0;
while (*string != 0) {
if ((used + need) > length) {
length += (used + need);
if ((result = typeRealloc(char, length, result)) == 0) {
length = 0;
break;
}
}
if (*string == '%') {
const char *fmt = 0;
switch (*++string) {
case '\0':
string--;
break;
case 'd':
fmt = "%d";
break;
case '2':
fmt = "%02d";
*value %= 100;
break;
case '3':
fmt = "%03d";
*value %= 1000;
break;
case '+':
*value += UChar(*++string);
/* FALLTHRU */
case '.':
/*
* Guard against tputs() seeing a truncated string. The
* termcap documentation refers to a similar fixup for \n
* and \r, but I don't see that it could work -TD
*/
if (*value == 0) {
if (BC != 0) {
*value += 1;
need_BC = TRUE;
} else {
/* tputs will pretend this is \0, which will almost
* always work since ANSI-compatible terminals ignore
* the character. ECMA-48 does not document a C1
* control for this value. A few (obsolete) terminals
* can use this value in special cases, such as cursor
* addressing using single-byte coordinates.
*/
*value = 0200;
}
}
result[used++] = (char) *value++;
break;
case '%':
result[used++] = *string;
break;
case 'r':
swap_arg = param[0];
param[0] = param[1];
param[1] = swap_arg;
break;
case 'i':
param[0] += 1;
param[1] += 1;
break;
case '>':
if (*value > string[1])
*value += string[2];
string += 2;
break;
case 'n': /* Datamedia 2500 */
param[0] ^= 0140;
param[1] ^= 0140;
break;
case 'B': /* BCD */
*value = 16 * (*value / 10) + (*value % 10);
break;
case 'D': /* Reverse coding (Delta Data) */
*value -= 2 * (*value % 16);
break;
}
if (fmt != 0) {
_nc_SPRINTF(result + used, _nc_SLIMIT(length - used)
fmt, *value++);
used += strlen(result + used);
fmt = 0;
}
if (value - param > 2) {
value = param + 2;
*value = 0;
}
} else {
result[used++] = *string;
}
string++;
}
if (result != 0) {
if (need_BC) {
_nc_STRCPY(result + used, BC, length - used);
used += strlen(BC);
}
result[used] = '\0';
}
return result;
}
#endif
/*
* Retained solely for upward compatibility. Note the intentional reversing of
* the last two arguments when invoking tparm().
*/
NCURSES_EXPORT(char *)
tgoto(const char *string, int x, int y)
{
char *result;
T((T_CALLED("tgoto(%s, %d, %d)"), _nc_visbuf(string), x, y));
#if !PURE_TERMINFO
if (is_termcap(string))
result = tgoto_internal(string, x, y);
else
#endif
if ((result = TIPARM_2(string, y, x)) == NULL) {
/*
* Because termcap did not provide a more general solution such as
* tparm(), it was necessary to handle single-parameter capabilities
* using tgoto(). The internal _nc_tiparm() function returns a NULL
* for that case; retry for the single-parameter case.
*/
if ((result = TIPARM_1(string, y)) == NULL) {
result = TIPARM_0(string);
}
}
returnPtr(result);
}
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