/****************************************************************************
* Copyright (c) 1998-2016,2017 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 1998 *
****************************************************************************/
#include <curses.priv.h>
#include <ctype.h>
#include <tic.h>
MODULE_ID("$Id: comp_expand.c,v 1.31 2017/04/20 08:55:08 tom Exp $")
#if 0
#define DEBUG_THIS(p) DEBUG(9, p)
#else
#define DEBUG_THIS(p) /* nothing */
#endif
static int
trailing_spaces(const char *src)
{
while (*src == ' ')
src++;
return *src == 0;
}
/* this deals with differences over whether 0x7f and 0x80..0x9f are controls */
#define REALPRINT(s) (UChar(*(s)) < 127 && isprint(UChar(*(s))))
#define P_LIMIT(p) (length - (size_t)(p))
NCURSES_EXPORT(char *)
_nc_tic_expand(const char *srcp, bool tic_format, int numbers)
{
static char *buffer;
static size_t length;
int bufp;
const char *str = VALID_STRING(srcp) ? srcp : "\0\0";
size_t need = (2 + strlen(str)) * 4;
int ch;
int octals = 0;
struct {
int ch;
int offset;
} fixups[MAX_TC_FIXUPS];
if (srcp == 0) {
#if NO_LEAKS
if (buffer != 0) {
FreeAndNull(buffer);
length = 0;
}
#endif
return 0;
}
if (buffer == 0 || need > length) {
if ((buffer = typeRealloc(char, length = need, buffer)) == 0)
return 0;
}
DEBUG_THIS(("_nc_tic_expand %s", _nc_visbuf(srcp)));
bufp = 0;
while ((ch = UChar(*str)) != 0) {
if (ch == '%' && REALPRINT(str + 1)) {
buffer[bufp++] = *str++;
/*
* Though the character literals are more compact, most
* terminal descriptions use numbers and are not easy
* to read in character-literal form.
*/
switch (numbers) {
case -1:
if (str[0] == S_QUOTE
&& str[1] != '\\'
&& REALPRINT(str + 1)
&& str[2] == S_QUOTE) {
_nc_SPRINTF(buffer + bufp, _nc_SLIMIT(P_LIMIT(bufp))
"{%d}", str[1]);
bufp += (int) strlen(buffer + bufp);
str += 2;
} else {
buffer[bufp++] = *str;
}
break;
/*
* If we have a "%{number}", try to translate it into
* a "%'char'" form, since that will run a little faster
* when we're interpreting it. Also, having one form
* for the constant makes it simpler to compare terminal
* descriptions.
*/
case 1:
if (str[0] == L_BRACE
&& isdigit(UChar(str[1]))) {
char *dst = 0;
long value = strtol(str + 1, &dst, 0);
if (dst != 0
&& *dst == R_BRACE
&& value < 127
&& value != '\\' /* FIXME */
&& isprint((int) value)) {
ch = (int) value;
buffer[bufp++] = S_QUOTE;
if (ch == '\\'
|| ch == S_QUOTE)
buffer[bufp++] = '\\';
buffer[bufp++] = (char) ch;
buffer[bufp++] = S_QUOTE;
str = dst;
} else {
buffer[bufp++] = *str;
}
} else {
buffer[bufp++] = *str;
}
break;
default:
if (*str == ',') /* minitel1 uses this */
buffer[bufp++] = '\\';
buffer[bufp++] = *str;
break;
}
} else if (ch == 128) {
buffer[bufp++] = '\\';
buffer[bufp++] = '0';
} else if (ch == '\033') {
buffer[bufp++] = '\\';
buffer[bufp++] = 'E';
} else if (ch == '\\' && tic_format && (str == srcp || str[-1] != '^')) {
buffer[bufp++] = '\\';
buffer[bufp++] = '\\';
} else if (ch == ' ' && tic_format && (str == srcp ||
trailing_spaces(str))) {
buffer[bufp++] = '\\';
buffer[bufp++] = 's';
} else if ((ch == ',' || ch == ':' || ch == '^') && tic_format) {
buffer[bufp++] = '\\';
buffer[bufp++] = (char) ch;
} else if (REALPRINT(str)
&& (ch != ','
&& ch != ':'
&& !(ch == '!' && !tic_format)
&& ch != '^'))
buffer[bufp++] = (char) ch;
else if (ch == '\r') {
buffer[bufp++] = '\\';
buffer[bufp++] = 'r';
} else if (ch == '\n') {
buffer[bufp++] = '\\';
buffer[bufp++] = 'n';
}
#define UnCtl(c) ((c) + '@')
else if (UChar(ch) < 32
&& isdigit(UChar(str[1]))) {
_nc_SPRINTF(&buffer[bufp], _nc_SLIMIT(P_LIMIT(bufp))
"^%c", UnCtl(ch));
bufp += 2;
} else {
_nc_SPRINTF(&buffer[bufp], _nc_SLIMIT(P_LIMIT(bufp))
"\\%03o", ch);
if ((octals < MAX_TC_FIXUPS) &&
((tic_format && (ch == 127)) || ch < 32)) {
fixups[octals].ch = UChar(ch);
fixups[octals].offset = bufp;
++octals;
}
bufp += 4;
}
str++;
}
buffer[bufp] = '\0';
/*
* If most of a short string is ASCII control characters, reformat the
* string to show those in up-arrow format. For longer strings, it's
* more likely that the characters are just binary coding.
*
* If we're formatting termcap, just use the shorter format (up-arrows).
*/
if (octals != 0 && (!tic_format || (bufp - (4 * octals)) < MIN_TC_FIXUPS)) {
while (--octals >= 0) {
char *p = buffer + fixups[octals].offset;
*p++ = '^';
*p++ = (char) ((fixups[octals].ch == 127)
? '?'
: (fixups[octals].ch + (int) '@'));
while ((p[0] = p[2]) != 0) {
++p;
}
}
}
DEBUG_THIS(("... %s", _nc_visbuf(buffer)));
return (buffer);
}
