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/* $OpenBSD: comp_expand.c,v 1.3 1998/08/15 18:44:43 millert Exp $ */
/****************************************************************************
* Copyright (c) 1998 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 <dickey@clark.net> 1998 *
****************************************************************************/
#include <curses.priv.h>
#include <ctype.h>
#include <tic.h>
MODULE_ID("$From: comp_expand.c,v 1.7 1998/05/30 23:32:45 Todd.Miller Exp $")
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 CHAR_OF(s) (*(unsigned const char *)(s))
#define REALCTL(s) (CHAR_OF(s) < 127 && iscntrl(CHAR_OF(s)))
#define REALPRINT(s) (CHAR_OF(s) < 127 && isprint(CHAR_OF(s)))
char *_nc_tic_expand(const char *srcp, bool tic_format)
{
static char * buffer;
static size_t length;
int bufp;
const char *ptr, *str = VALID_STRING(srcp) ? srcp : "";
char *nbuffer;
bool islong = (strlen(str) > 3);
size_t need = (2 + strlen(str)) * 4;
int ch;
if (buffer == 0 || need > length) {
length = need;
nbuffer = buffer ? realloc(buffer, length) : malloc(length);
if (nbuffer == 0) {
if (buffer != 0)
free(buffer);
return(NULL);
}
buffer = nbuffer;
}
bufp = 0;
ptr = str;
while ((ch = (*str & 0xff)) != 0) {
if (ch == '%' && REALPRINT(str+1)) {
buffer[bufp++] = *str++;
buffer[bufp++] = *str;
}
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++] = ch;
}
else if (REALPRINT(str) && (ch != ',' && ch != ':' && !(ch == '!' && !tic_format) && ch != '^'))
buffer[bufp++] = ch;
#if 0 /* FIXME: this would be more readable (in fact the whole 'islong' logic should be removed) */
else if (ch == '\b') {
buffer[bufp++] = '\\';
buffer[bufp++] = 'b';
}
else if (ch == '\f') {
buffer[bufp++] = '\\';
buffer[bufp++] = 'f';
}
else if (ch == '\t' && islong) {
buffer[bufp++] = '\\';
buffer[bufp++] = 't';
}
#endif
else if (ch == '\r' && (islong || (strlen(srcp) > 2 && str[1] == '\0'))) {
buffer[bufp++] = '\\';
buffer[bufp++] = 'r';
}
else if (ch == '\n' && islong) {
buffer[bufp++] = '\\';
buffer[bufp++] = 'n';
}
#define UnCtl(c) ((c) + '@')
else if (REALCTL(str) && ch != '\\' && (!islong || isdigit(str[1])))
{
(void) sprintf(&buffer[bufp], "^%c", UnCtl(ch));
bufp += 2;
}
else
{
(void) sprintf(&buffer[bufp], "\\%03o", ch);
bufp += 4;
}
str++;
}
buffer[bufp] = '\0';
return(buffer);
}
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