/****************************************************************************
- * Copyright (c) 1998-2006,2008 Free Software Foundation, Inc. *
+,* Copyright 2020-2022,2023 Thomas E. Dickey *
+ * Copyright 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 1.84 2009/05/09 16:37:42 tom Exp $")
+MODULE_ID("$Id: comp_scan.c,v 1.122 2023/05/27 20:13:10 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 */
NCURSES_EXPORT(void)
_nc_reset_input(FILE *fp, char *buf)
{
+ TR(TRACE_DATABASE,
+ (T_CALLED("_nc_reset_input(fp=%p, buf=%p)"), (void *) fp, buf));
+
pushtype = NO_PUSHBACK;
if (pushname != 0)
pushname[0] = '\0';
if (fp != 0)
_nc_curr_line = 0;
_nc_curr_col = 0;
+
+ returnVoidDB;
}
/*
* 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 result;
+}
+
+/*
+ * Read, like fgets(), but error-out if the input contains nulls.
+ */
+static int
+get_text(char *buffer, int length)
+{
+ int count = 0;
+ int limit = length - 1;
+
+ while (limit-- > 0) {
+ int ch = fgetc(yyin);
+
+ if (ch == '\0') {
+ _nc_err_abort("This is not a text-file");
+ } else if (ch == EOF) {
+ break;
+ }
+ ++count;
+ *buffer++ = (char) ch;
+ if (ch == '\n')
+ break;
}
- return 0;
+ *buffer = '\0';
+ return count;
}
/*
if (result != 0) {
FreeAndNull(result);
FreeAndNull(pushname);
+ bufptr = 0;
+ bufstart = 0;
allocated = 0;
}
/*
* 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) {
+ if (get_text(result + used, (int) (allocated - used))) {
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);
+ if (used == 0)
+ return (EOF);
while (iswhite(*bufptr)) {
if (*bufptr == '\t') {
_nc_curr_col = (_nc_curr_col | 7) + 1;
}
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;
+ _nc_syserr_abort("cannot backspace off beginning of line");
+ *--bufptr = (char) c;
_nc_curr_col--;
}
stream_pos(void)
/* return our current character position in the input stream */
{
- return (yyin ? ftell(yyin) : (bufptr ? bufptr - bufstart : 0));
+ return (yyin ? ftell(yyin) : (bufptr ? (long) (bufptr - bufstart) : 0));
}
static bool
end_of_stream(void)
/* are we at end of input? */
{
- return ((yyin ? feof(yyin) : (bufptr && *bufptr == '\0'))
+ return ((yyin
+ ? (feof(yyin) && (bufptr == NULL || *bufptr == '\0'))
+ : (bufptr && *bufptr == '\0'))
? TRUE : FALSE);
}
static NCURSES_INLINE int
eat_escaped_newline(int ch)
{
- if (ch == '\\')
- while ((ch = next_char()) == '\n' || iswhite(ch))
- continue;
+ if (ch == '\\') {
+ while ((ch = next_char()) == '\n' || iswhite(ch)) {
+ /* EMPTY */ ;
+ }
+ }
return ch;
}
*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;
int old_col;
#endif
+ DEBUG(3, (T_CALLED("_nc_get_token(silent=%d)"), silent));
+
if (pushtype != NO_PUSHBACK) {
int retval = pushtype;
pushname[0] = '\0';
/* currtok wasn't altered by _nc_push_token() */
+ DEBUG(3, (T_RETURN("%d"), retval));
return (retval);
}
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);
}
+ DEBUG(3, (T_RETURN("%d"), EOF));
return (EOF);
}
while ((ch = next_char()) == '\n' || iswhite(ch)) {
if (ch == '\n')
had_newline = TRUE;
- continue;
}
ch = eat_escaped_newline(ch);
+ _nc_curr_token.tk_valstring = 0;
#ifdef TRACE
old_line = _nc_curr_line;
dot_flag = TRUE;
DEBUG(8, ("dot-flag set"));
- while ((ch = next_char()) == '.' || iswhite(ch))
- continue;
+ while ((ch = next_char()) == '.' || iswhite(ch)) {
+ /* EMPTY */ ;
+ }
}
if (ch == EOF) {
#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((chtype) ch));
+ terminfo_punct, unctrl(UChar(ch)));
_nc_panic_mode(separator);
goto start_token;
}
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;
}
}
* Grrr...what we ought to do here is barf, complaining that
* the entry is malformed. But because a couple of name fields
* in the 8.2 termcap file end with |\, we just have to assume
- * it's termcap syntax.
+ * it is termcap syntax.
*/
_nc_syntax = SYN_TERMCAP;
separator = ':';
/* throw away trailing /, *$/ */
for (--tok_ptr;
iswhite(*tok_ptr) || *tok_ptr == ',';
- tok_ptr--)
- continue;
+ tok_ptr--) {
+ /* EMPTY */ ;
+ }
tok_ptr[1] = '\0';
}
*/
if (after_list != 0) {
if (!silent) {
- if (*after_list == '\0')
+ if (*after_list == '\0' || strchr("|", after_list[1]) != NULL) {
_nc_warning("empty longname field");
- else if (strchr(after_list, ' ') == 0)
+ } else if (strchr(after_list, ' ') == 0) {
_nc_warning("older tic versions may treat the description field as an alias");
+ }
}
} else {
after_list = tok_buf + strlen(tok_buf);
- DEBUG(1, ("missing description"));
+ DEBUG(2, ("missing description"));
}
/*
case '@':
if ((ch = next_char()) != separator && !silent)
_nc_warning("Missing separator after `%s', have %s",
- tok_buf, unctrl((chtype) ch));
+ tok_buf, unctrl(UChar(ch)));
_nc_curr_token.tk_name = tok_buf;
type = CANCEL;
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;
/* just to get rid of the compiler warning */
type = UNDEF;
if (!silent)
- _nc_warning("Illegal character - '%s'",
- unctrl((chtype) ch));
+ _nc_warning("Illegal character - '%s'", unctrl(UChar(ch)));
}
} /* end else (first_column == FALSE) */
} /* end else (ch != EOF) */
: "<null>"),
type));
+ DEBUG(3, (T_RETURN("%d"), type));
return (type);
}
*/
NCURSES_EXPORT(int)
-_nc_trans_string(char *ptr, char *last)
+_nc_trans_string(char *ptr, const char *const last)
{
int count = 0;
int number = 0;
int i, c;
- chtype ch, last_ch = '\0';
+ int last_ch = '\0';
bool ignored = FALSE;
bool long_warning = FALSE;
- while ((ch = c = next_char()) != (chtype) separator && c != EOF) {
+ while ((c = next_char()) != separator && c != EOF) {
if (ptr >= (last - 1)) {
if (c != EOF) {
while ((c = next_char()) != separator && c != EOF) {
;
}
- ch = c;
}
break;
}
if ((_nc_syntax == SYN_TERMCAP) && c == '\n')
break;
- if (ch == '^' && last_ch != '%') {
- ch = c = next_char();
+ if (c == '^' && last_ch != '%') {
+ c = next_char();
if (c == EOF)
_nc_err_abort(MSG_NO_INPUTS);
- if (!(is7bits(ch) && isprint(ch))) {
- _nc_warning("Illegal ^ character - '%s'", unctrl(ch));
+ if (!(is7bits(c) && isprint(c))) {
+ _nc_warning("Illegal ^ character - '%s'", unctrl(UChar(c)));
}
- if (ch == '?') {
+ if (c == '?' && (_nc_syntax != SYN_TERMCAP)) {
*(ptr++) = '\177';
- if (_nc_tracing)
- _nc_warning("Allow ^? as synonym for \\177");
} else {
- if ((ch &= 037) == 0)
- ch = 128;
- *(ptr++) = (char) (ch);
+ if ((c &= 037) == 0)
+ c = 128;
+ *(ptr++) = (char) (c);
}
- } else if (ch == '\\') {
- ch = c = next_char();
+ } 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 (ch >= '0' && ch <= '7') {
- number = ch - '0';
+ if (isoctal(c) || (strict_bsd && isdigit(c))) {
+ number = c - '0';
for (i = 0; i < 2; i++) {
- ch = c = next_char();
+ 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(ch));
+ 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) ch;
- } /* endswitch (ch) */
- } /* endelse (ch < '0' || ch > '7') */
+ *(ptr++) = (char) c;
+ } /* endswitch (c) */
+ } /* endelse (c < '0' || c > '7') */
}
- /* end else if (ch == '\\') */
- else if (ch == '\n' && (_nc_syntax == SYN_TERMINFO)) {
+ /* end else if (c == '\\') */
+ else if (c == '\n' && (_nc_syntax == SYN_TERMINFO)) {
/*
* Newlines embedded in a terminfo string are ignored, provided
* that the next line begins with whitespace.
*/
ignored = TRUE;
} else {
- *(ptr++) = (char) ch;
+ *(ptr++) = (char) c;
}
if (!ignored) {
if (_nc_curr_col <= 1) {
- push_back((char) ch);
- ch = '\n';
+ push_back(c);
+ c = '\n';
break;
}
- last_ch = ch;
+ last_ch = c;
count++;
}
ignored = FALSE;
*ptr = '\0';
- return (ch);
+ return (c);
}
/*
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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