/****************************************************************************
- * Copyright (c) 1998-2008,2010 Free Software Foundation, Inc. *
+ * 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 *
#include <curses.priv.h>
#include <ctype.h>
-#include <term_entry.h>
#include <tic.h>
-MODULE_ID("$Id: comp_scan.c,v 1.85 2010/01/16 17:02:17 tom Exp $")
+MODULE_ID("$Id: comp_scan.c,v 1.106 2017/04/22 11:41:12 tom Exp $")
/*
* Maximum length of string capability we'll accept before raising an error.
#define iswhite(ch) (ch == ' ' || ch == '\t')
NCURSES_EXPORT_VAR (int) _nc_syntax = 0; /* termcap or terminfo? */
+NCURSES_EXPORT_VAR (int) _nc_strict_bsd = 1; /* ncurses extended termcap? */
NCURSES_EXPORT_VAR (long) _nc_curr_file_pos = 0; /* file offset of current line */
NCURSES_EXPORT_VAR (long) _nc_comment_start = 0; /* start of comment range before name */
NCURSES_EXPORT_VAR (long) _nc_comment_end = 0; /* end of comment range before name */
* Returns the final nonblank character on the current input buffer
*/
static int
-last_char(void)
+last_char(int from_end)
{
size_t len = strlen(bufptr);
+ int result = 0;
+
while (len--) {
- if (!isspace(UChar(bufptr[len])))
- return bufptr[len];
+ if (!isspace(UChar(bufptr[len]))) {
+ if (from_end < (int) len)
+ result = bufptr[(int) len - from_end];
+ break;
+ }
}
- return 0;
+ return result;
}
/*
* quite hard to get completely right. Try it and see. If you
* succeed, don't forget to hack push_back() correspondingly.
*/
- size_t used;
size_t len;
do {
+ size_t used = 0;
bufstart = 0;
- used = 0;
do {
if (used + (LEXBUFSIZ / 4) >= allocated) {
allocated += (allocated + LEXBUFSIZ);
result = typeRealloc(char, allocated, result);
if (result == 0)
return (EOF);
- bufstart = result;
+ if (bufstart)
+ bufstart = result;
}
if (used == 0)
_nc_curr_file_pos = ftell(yyin);
if (fgets(result + used, (int) (allocated - used), yyin) != 0) {
bufstart = result;
if (used == 0) {
+ if (_nc_curr_line == 0
+ && IS_TIC_MAGIC(result)) {
+ _nc_err_abort("This is a compiled terminal description, not a source");
+ }
_nc_curr_line++;
_nc_curr_col = 0;
}
} else {
if (used != 0)
- strcat(result, "\n");
+ _nc_STRCAT(result, "\n", allocated);
}
if ((bufptr = bufstart) != 0) {
used = strlen(bufptr);
}
static void
-push_back(char c)
+push_back(int c)
/* push a character back onto the input stream */
{
if (bufptr == bufstart)
_nc_syserr_abort("Can't backspace off beginning of line");
- *--bufptr = c;
+ *--bufptr = (char) c;
_nc_curr_col--;
}
*tok_ptr++ = (char) ch; \
*tok_ptr = '\0'
+static char *tok_buf;
+
/*
* int
* get_token()
_nc_get_token(bool silent)
{
static const char terminfo_punct[] = "@%&*!#";
- static char *tok_buf;
- char *after_list;
- char *after_name;
+ char *after_name; /* after primary name */
+ char *after_list; /* after primary and alias list */
char *numchk;
char *tok_ptr;
char *s;
char numbuf[80];
- int ch;
+ int ch, c0, c1;
int dot_flag = FALSE;
int type;
long number;
if (end_of_stream()) {
yyin = 0;
- next_char(); /* frees its allocated memory */
+ (void) next_char(); /* frees its allocated memory */
if (tok_buf != 0) {
if (_nc_curr_token.tk_name == tok_buf)
_nc_curr_token.tk_name = 0;
- FreeAndNull(tok_buf);
}
return (EOF);
}
}
ch = eat_escaped_newline(ch);
+ _nc_curr_token.tk_valstring = 0;
#ifdef TRACE
old_line = _nc_curr_line;
#if NCURSES_EXT_FUNCS
&& !(ch == '.' && _nc_disable_period)
#endif
- && !strchr(terminfo_punct, (char) ch)) {
+ && ((strchr) (terminfo_punct, (char) ch) == 0)) {
if (!silent)
_nc_warning("Illegal character (expected alphanumeric or %s) - '%s'",
terminfo_punct, unctrl(UChar(ch)));
after_list = tok_ptr;
if (after_name == 0)
after_name = tok_ptr;
- } else if (ch == ':' && last_char() != ',') {
+ } else if (ch == ':' && last_char(0) != ',') {
_nc_syntax = SYN_TERMCAP;
separator = ':';
break;
if (after_name == 0)
break;
/*
- * If we see a comma, we assume this is terminfo unless we
- * subsequently run into a colon. But we don't stop
- * looking for a colon until hitting a newline. This
- * allows commas to be embedded in description fields of
- * either syntax.
+ * We saw a comma, but are not entirely sure this is
+ * terminfo format, since we can still be parsing the
+ * description field (for either syntax).
+ *
+ * A properly formatted termcap line ends with either a
+ * colon, or a backslash after a colon. It is possible
+ * to have a backslash in the middle of a capability, but
+ * then there would be no leading whitespace on the next
+ * line - something we want to discourage.
*/
+ c0 = last_char(0);
+ c1 = last_char(1);
+ if (c1 != ':' && c0 != '\\' && c0 != ':') {
+ bool capability = FALSE;
+
+ /*
+ * Since it is not termcap, assume the line is terminfo
+ * format. However, the comma can be embedded in a
+ * description field. It also can be a separator
+ * between a description field and a capability.
+ *
+ * Improve the guess by checking if the next word after
+ * the comma does not look like a capability. In that
+ * case, extend the description past the comma.
+ */
+ for (s = bufptr; isspace(UChar(*s)); ++s) {
+ ;
+ }
+ if (islower(UChar(*s))) {
+ char *name = s;
+ while (isalnum(UChar(*s))) {
+ ++s;
+ }
+ if (*s == '#' || *s == '=' || *s == '@') {
+ /*
+ * Checking solely with syntax allows us to
+ * support extended capabilities with string
+ * values.
+ */
+ capability = TRUE;
+ } else if (*s == ',') {
+ c0 = *s;
+ *s = '\0';
+ /*
+ * Otherwise, we can handle predefined boolean
+ * capabilities, still aided by syntax.
+ */
+ if (_nc_find_entry(name,
+ _nc_get_hash_table(FALSE))) {
+ capability = TRUE;
+ }
+ *s = (char) c0;
+ }
+ }
+ if (capability) {
+ break;
+ }
+ }
} else
ch = eat_escaped_newline(ch);
if (OkToAdd()) {
AddCh(ch);
} else {
- ch = EOF;
break;
}
}
if (numchk == numbuf)
_nc_warning("no value given for `%s'", tok_buf);
if ((*numchk != '\0') || (ch != separator))
- _nc_warning("Missing separator");
+ _nc_warning("Missing separator for `%s'", tok_buf);
+ if (number < 0)
+ _nc_warning("value of `%s' cannot be negative", tok_buf);
+ if (number > MAX_OF_TYPE(NCURSES_INT2)) {
+ _nc_warning("limiting value of `%s' from %#lx to %#x",
+ tok_buf,
+ number, MAX_OF_TYPE(NCURSES_INT2));
+ number = MAX_OF_TYPE(NCURSES_INT2);
+ }
}
_nc_curr_token.tk_name = tok_buf;
- _nc_curr_token.tk_valnumber = number;
+ _nc_curr_token.tk_valnumber = (int) number;
type = NUMBER;
break;
if (!(is7bits(c) && isprint(c))) {
_nc_warning("Illegal ^ character - '%s'", unctrl(UChar(c)));
}
- if (c == '?') {
+ if (c == '?' && (_nc_syntax != SYN_TERMCAP)) {
*(ptr++) = '\177';
- if (_nc_tracing)
- _nc_warning("Allow ^? as synonym for \\177");
} else {
if ((c &= 037) == 0)
c = 128;
*(ptr++) = (char) (c);
}
} else if (c == '\\') {
+ bool strict_bsd = ((_nc_syntax == SYN_TERMCAP) && _nc_strict_bsd);
+
c = next_char();
if (c == EOF)
_nc_err_abort(MSG_NO_INPUTS);
- if (c >= '0' && c <= '7') {
+ if (isoctal(c) || (strict_bsd && isdigit(c))) {
number = c - '0';
for (i = 0; i < 2; i++) {
c = next_char();
if (c == EOF)
_nc_err_abort(MSG_NO_INPUTS);
- if (c < '0' || c > '7') {
+ if (!isoctal(c)) {
if (isdigit(c)) {
- _nc_warning("Non-octal digit `%c' in \\ sequence", c);
- /* allow the digit; it'll do less harm */
+ if (!strict_bsd) {
+ _nc_warning("Non-octal digit `%c' in \\ sequence", c);
+ /* allow the digit; it'll do less harm */
+ }
} else {
- push_back((char) c);
+ push_back(c);
break;
}
}
number = number * 8 + c - '0';
}
- if (number == 0)
+ number = UChar(number);
+ if (number == 0 && !strict_bsd)
number = 0200;
*(ptr++) = (char) number;
} else {
switch (c) {
case 'E':
- case 'e':
*(ptr++) = '\033';
break;
- case 'a':
- *(ptr++) = '\007';
- break;
-
- case 'l':
case 'n':
*(ptr++) = '\n';
break;
*(ptr++) = '\010';
break;
- case 's':
- *(ptr++) = ' ';
- break;
-
case 'f':
*(ptr++) = '\014';
break;
*(ptr++) = ',';
break;
- case ':':
- *(ptr++) = ':';
- break;
-
case '\n':
continue;
default:
- _nc_warning("Illegal character '%s' in \\ sequence",
- unctrl(UChar(c)));
+ if ((_nc_syntax == SYN_TERMINFO) || !_nc_strict_bsd) {
+ switch (c) {
+ case 'a':
+ c = '\007';
+ break;
+ case 'e':
+ c = '\033';
+ break;
+ case 'l':
+ c = '\n';
+ break;
+ case 's':
+ c = ' ';
+ break;
+ case ':':
+ c = ':';
+ break;
+ default:
+ _nc_warning("Illegal character '%s' in \\ sequence",
+ unctrl(UChar(c)));
+ break;
+ }
+ }
/* FALLTHRU */
case '|':
*(ptr++) = (char) c;
if (!ignored) {
if (_nc_curr_col <= 1) {
- push_back((char) c);
+ push_back(c);
c = '\n';
break;
}
NCURSES_EXPORT(void)
_nc_panic_mode(char ch)
{
- int c;
-
for (;;) {
- c = next_char();
+ int c = next_char();
if (c == ch)
return;
if (c == EOF)
if (pushname != 0) {
FreeAndNull(pushname);
}
+ if (tok_buf != 0) {
+ FreeAndNull(tok_buf);
+ }
}
#endif
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