| Current Path : /usr/src/contrib/ncurses/ncurses/tinfo/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //usr/src/contrib/ncurses/ncurses/tinfo/comp_scan.c |
/****************************************************************************
* Copyright (c) 1998-2006,2008 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: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
* and: Eric S. Raymond <esr@snark.thyrsus.com> *
* and: Thomas E. Dickey 1996 on *
****************************************************************************/
/* $FreeBSD: release/9.1.0/contrib/ncurses/ncurses/tinfo/comp_scan.c 184989 2008-11-15 09:23:48Z rafan $ */
/*
* comp_scan.c --- Lexical scanner for terminfo compiler.
*
* _nc_reset_input()
* _nc_get_token()
* _nc_panic_mode()
* int _nc_syntax;
* int _nc_curr_line;
* long _nc_curr_file_pos;
* long _nc_comment_start;
* long _nc_comment_end;
*/
#include <curses.priv.h>
#include <ctype.h>
#include <term_entry.h>
#include <tic.h>
MODULE_ID("$Id: comp_scan.c,v 1.83 2008/08/16 19:22:55 tom Exp $")
/*
* Maximum length of string capability we'll accept before raising an error.
* Yes, there is a real capability in /etc/termcap this long, an "is".
*/
#define MAXCAPLEN 600
#define iswhite(ch) (ch == ' ' || ch == '\t')
NCURSES_EXPORT_VAR(int)
_nc_syntax = 0; /* termcap or terminfo? */
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_VAR(long)
_nc_start_line = 0; /* start line of current entry */
NCURSES_EXPORT_VAR(struct token)
_nc_curr_token =
{
0, 0, 0
};
/*****************************************************************************
*
* Token-grabbing machinery
*
*****************************************************************************/
static bool first_column; /* See 'next_char()' below */
static bool had_newline;
static char separator; /* capability separator */
static int pushtype; /* type of pushback token */
static char *pushname;
#if NCURSES_EXT_FUNCS
NCURSES_EXPORT_VAR(bool)
_nc_disable_period = FALSE; /* used by tic -a option */
#endif
/*****************************************************************************
*
* Character-stream handling
*
*****************************************************************************/
#define LEXBUFSIZ 1024
static char *bufptr; /* otherwise, the input buffer pointer */
static char *bufstart; /* start of buffer so we can compute offsets */
static FILE *yyin; /* scanner's input file descriptor */
/*
* _nc_reset_input()
*
* Resets the input-reading routines. Used on initialization,
* or after a seek has been done. Exactly one argument must be
* non-null.
*/
NCURSES_EXPORT(void)
_nc_reset_input(FILE *fp, char *buf)
{
pushtype = NO_PUSHBACK;
if (pushname != 0)
pushname[0] = '\0';
yyin = fp;
bufstart = bufptr = buf;
_nc_curr_file_pos = 0L;
if (fp != 0)
_nc_curr_line = 0;
_nc_curr_col = 0;
}
/*
* int last_char()
*
* Returns the final nonblank character on the current input buffer
*/
static int
last_char(void)
{
size_t len = strlen(bufptr);
while (len--) {
if (!isspace(UChar(bufptr[len])))
return bufptr[len];
}
return 0;
}
/*
* int next_char()
*
* Returns the next character in the input stream. Comments and leading
* white space are stripped.
*
* The global state variable 'firstcolumn' is set TRUE if the character
* returned is from the first column of the input line.
*
* The global variable _nc_curr_line is incremented for each new line.
* The global variable _nc_curr_file_pos is set to the file offset of the
* beginning of each line.
*/
static int
next_char(void)
{
static char *result;
static size_t allocated;
int the_char;
if (!yyin) {
if (result != 0) {
FreeAndNull(result);
FreeAndNull(pushname);
allocated = 0;
}
/*
* An string with an embedded null will truncate the input. This is
* intentional (we don't read binary files here).
*/
if (bufptr == 0 || *bufptr == '\0')
return (EOF);
if (*bufptr == '\n') {
_nc_curr_line++;
_nc_curr_col = 0;
} else if (*bufptr == '\t') {
_nc_curr_col = (_nc_curr_col | 7);
}
} else if (!bufptr || !*bufptr) {
/*
* In theory this could be recoded to do its I/O one character at a
* time, saving the buffer space. In practice, this turns out to be
* 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 {
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 (used == 0)
_nc_curr_file_pos = ftell(yyin);
if (fgets(result + used, (int) (allocated - used), yyin) != 0) {
bufstart = result;
if (used == 0) {
_nc_curr_line++;
_nc_curr_col = 0;
}
} else {
if (used != 0)
strcat(result, "\n");
}
if ((bufptr = bufstart) != 0) {
used = strlen(bufptr);
while (iswhite(*bufptr)) {
if (*bufptr == '\t') {
_nc_curr_col = (_nc_curr_col | 7) + 1;
} else {
_nc_curr_col++;
}
bufptr++;
}
/*
* Treat a trailing <cr><lf> the same as a <newline> so we
* can read files on OS/2, etc.
*/
if ((len = strlen(bufptr)) > 1) {
if (bufptr[len - 1] == '\n'
&& bufptr[len - 2] == '\r') {
len--;
bufptr[len - 1] = '\n';
bufptr[len] = '\0';
}
}
} else {
return (EOF);
}
} while (bufptr[len - 1] != '\n'); /* complete a line */
} while (result[0] == '#'); /* ignore comments */
} else if (*bufptr == '\t') {
_nc_curr_col = (_nc_curr_col | 7);
}
first_column = (bufptr == bufstart);
if (first_column)
had_newline = FALSE;
_nc_curr_col++;
the_char = *bufptr++;
return UChar(the_char);
}
static void
push_back(char 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_curr_col--;
}
static long
stream_pos(void)
/* return our current character position in the input stream */
{
return (yyin ? ftell(yyin) : (bufptr ? bufptr - bufstart : 0));
}
static bool
end_of_stream(void)
/* are we at end of input? */
{
return ((yyin ? feof(yyin) : (bufptr && *bufptr == '\0'))
? TRUE : FALSE);
}
/* Assume we may be looking at a termcap-style continuation */
static NCURSES_INLINE int
eat_escaped_newline(int ch)
{
if (ch == '\\')
while ((ch = next_char()) == '\n' || iswhite(ch))
continue;
return ch;
}
#define TOK_BUF_SIZE MAX_ENTRY_SIZE
#define OkToAdd() \
((tok_ptr - tok_buf) < (TOK_BUF_SIZE - 2))
#define AddCh(ch) \
*tok_ptr++ = (char) ch; \
*tok_ptr = '\0'
/*
* int
* get_token()
*
* Scans the input for the next token, storing the specifics in the
* global structure 'curr_token' and returning one of the following:
*
* NAMES A line beginning in column 1. 'name'
* will be set to point to everything up to but
* not including the first separator on the line.
* BOOLEAN An entry consisting of a name followed by
* a separator. 'name' will be set to point to
* the name of the capability.
* NUMBER An entry of the form
* name#digits,
* 'name' will be set to point to the capability
* name and 'valnumber' to the number given.
* STRING An entry of the form
* name=characters,
* 'name' is set to the capability name and
* 'valstring' to the string of characters, with
* input translations done.
* CANCEL An entry of the form
* name@,
* 'name' is set to the capability name and
* 'valnumber' to -1.
* EOF The end of the file has been reached.
*
* A `separator' is either a comma or a semicolon, depending on whether
* we are in termcap or terminfo mode.
*
*/
NCURSES_EXPORT(int)
_nc_get_token(bool silent)
{
static const char terminfo_punct[] = "@%&*!#";
static char *tok_buf;
char *after_list;
char *after_name;
char *numchk;
char *tok_ptr;
char *s;
char numbuf[80];
int ch;
int dot_flag = FALSE;
int type;
long number;
long token_start;
unsigned found;
#ifdef TRACE
int old_line;
int old_col;
#endif
if (pushtype != NO_PUSHBACK) {
int retval = pushtype;
_nc_set_type(pushname != 0 ? pushname : "");
DEBUG(3, ("pushed-back token: `%s', class %d",
_nc_curr_token.tk_name, pushtype));
pushtype = NO_PUSHBACK;
if (pushname != 0)
pushname[0] = '\0';
/* currtok wasn't altered by _nc_push_token() */
return (retval);
}
if (end_of_stream()) {
yyin = 0;
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);
}
start_token:
token_start = stream_pos();
while ((ch = next_char()) == '\n' || iswhite(ch)) {
if (ch == '\n')
had_newline = TRUE;
continue;
}
ch = eat_escaped_newline(ch);
#ifdef TRACE
old_line = _nc_curr_line;
old_col = _nc_curr_col;
#endif
if (ch == EOF)
type = EOF;
else {
/* if this is a termcap entry, skip a leading separator */
if (separator == ':' && ch == ':')
ch = next_char();
if (ch == '.'
#if NCURSES_EXT_FUNCS
&& !_nc_disable_period
#endif
) {
dot_flag = TRUE;
DEBUG(8, ("dot-flag set"));
while ((ch = next_char()) == '.' || iswhite(ch))
continue;
}
if (ch == EOF) {
type = EOF;
goto end_of_token;
}
/* have to make some punctuation chars legal for terminfo */
if (!isalnum(UChar(ch))
#if NCURSES_EXT_FUNCS
&& !(ch == '.' && _nc_disable_period)
#endif
&& !strchr(terminfo_punct, (char) ch)) {
if (!silent)
_nc_warning("Illegal character (expected alphanumeric or %s) - '%s'",
terminfo_punct, unctrl((chtype) ch));
_nc_panic_mode(separator);
goto start_token;
}
if (tok_buf == 0)
tok_buf = typeMalloc(char, TOK_BUF_SIZE);
#ifdef TRACE
old_line = _nc_curr_line;
old_col = _nc_curr_col;
#endif
tok_ptr = tok_buf;
AddCh(ch);
if (first_column) {
_nc_comment_start = token_start;
_nc_comment_end = _nc_curr_file_pos;
_nc_start_line = _nc_curr_line;
_nc_syntax = ERR;
after_name = 0;
after_list = 0;
while ((ch = next_char()) != '\n') {
if (ch == EOF) {
_nc_err_abort(MSG_NO_INPUTS);
} else if (ch == '|') {
after_list = tok_ptr;
if (after_name == 0)
after_name = tok_ptr;
} else if (ch == ':' && last_char() != ',') {
_nc_syntax = SYN_TERMCAP;
separator = ':';
break;
} else if (ch == ',') {
_nc_syntax = SYN_TERMINFO;
separator = ',';
/*
* If we did not see a '|', then we found a name with no
* aliases or description.
*/
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.
*/
} else
ch = eat_escaped_newline(ch);
if (OkToAdd()) {
AddCh(ch);
} else {
ch = EOF;
break;
}
}
*tok_ptr = '\0';
if (_nc_syntax == ERR) {
/*
* 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.
*/
_nc_syntax = SYN_TERMCAP;
separator = ':';
} else if (_nc_syntax == SYN_TERMINFO) {
/* throw away trailing /, *$/ */
for (--tok_ptr;
iswhite(*tok_ptr) || *tok_ptr == ',';
tok_ptr--)
continue;
tok_ptr[1] = '\0';
}
/*
* This is the soonest we have the terminal name fetched. Set up
* for following warning messages. If there's no '|', then there
* is no description.
*/
if (after_name != 0) {
ch = *after_name;
*after_name = '\0';
_nc_set_type(tok_buf);
*after_name = (char) ch;
}
/*
* Compute the boundary between the aliases and the description
* field for syntax-checking purposes.
*/
if (after_list != 0) {
if (!silent) {
if (*after_list == '\0')
_nc_warning("empty longname field");
#ifndef FREEBSD_NATIVE
else if (strchr(after_list, ' ') == 0)
_nc_warning("older tic versions may treat the description field as an alias");
#endif
}
} else {
after_list = tok_buf + strlen(tok_buf);
DEBUG(1, ("missing description"));
}
/*
* Whitespace in a name field other than the long name can confuse
* rdist and some termcap tools. Slashes are a no-no. Other
* special characters can be dangerous due to shell expansion.
*/
for (s = tok_buf; s < after_list; ++s) {
if (isspace(UChar(*s))) {
if (!silent)
_nc_warning("whitespace in name or alias field");
break;
} else if (*s == '/') {
if (!silent)
_nc_warning("slashes aren't allowed in names or aliases");
break;
} else if (strchr("$[]!*?", *s)) {
if (!silent)
_nc_warning("dubious character `%c' in name or alias field", *s);
break;
}
}
_nc_curr_token.tk_name = tok_buf;
type = NAMES;
} else {
if (had_newline && _nc_syntax == SYN_TERMCAP) {
_nc_warning("Missing backslash before newline");
had_newline = FALSE;
}
while ((ch = next_char()) != EOF) {
if (!isalnum(UChar(ch))) {
if (_nc_syntax == SYN_TERMINFO) {
if (ch != '_')
break;
} else { /* allow ';' for "k;" */
if (ch != ';')
break;
}
}
if (OkToAdd()) {
AddCh(ch);
} else {
ch = EOF;
break;
}
}
*tok_ptr++ = '\0'; /* separate name/value in buffer */
switch (ch) {
case ',':
case ':':
if (ch != separator)
_nc_err_abort("Separator inconsistent with syntax");
_nc_curr_token.tk_name = tok_buf;
type = BOOLEAN;
break;
case '@':
if ((ch = next_char()) != separator && !silent)
_nc_warning("Missing separator after `%s', have %s",
tok_buf, unctrl((chtype) ch));
_nc_curr_token.tk_name = tok_buf;
type = CANCEL;
break;
case '#':
found = 0;
while (isalnum(ch = next_char())) {
numbuf[found++] = (char) ch;
if (found >= sizeof(numbuf) - 1)
break;
}
numbuf[found] = '\0';
number = strtol(numbuf, &numchk, 0);
if (!silent) {
if (numchk == numbuf)
_nc_warning("no value given for `%s'", tok_buf);
if ((*numchk != '\0') || (ch != separator))
_nc_warning("Missing separator");
}
_nc_curr_token.tk_name = tok_buf;
_nc_curr_token.tk_valnumber = number;
type = NUMBER;
break;
case '=':
ch = _nc_trans_string(tok_ptr, tok_buf + TOK_BUF_SIZE);
if (!silent && ch != separator)
_nc_warning("Missing separator");
_nc_curr_token.tk_name = tok_buf;
_nc_curr_token.tk_valstring = tok_ptr;
type = STRING;
break;
case EOF:
type = EOF;
break;
default:
/* just to get rid of the compiler warning */
type = UNDEF;
if (!silent)
_nc_warning("Illegal character - '%s'", unctrl((chtype) ch));
}
} /* end else (first_column == FALSE) */
} /* end else (ch != EOF) */
end_of_token:
#ifdef TRACE
if (dot_flag == TRUE)
DEBUG(8, ("Commented out "));
if (_nc_tracing >= DEBUG_LEVEL(8)) {
_tracef("parsed %d.%d to %d.%d",
old_line, old_col,
_nc_curr_line, _nc_curr_col);
}
if (_nc_tracing >= DEBUG_LEVEL(7)) {
switch (type) {
case BOOLEAN:
_tracef("Token: Boolean; name='%s'",
_nc_curr_token.tk_name);
break;
case NUMBER:
_tracef("Token: Number; name='%s', value=%d",
_nc_curr_token.tk_name,
_nc_curr_token.tk_valnumber);
break;
case STRING:
_tracef("Token: String; name='%s', value=%s",
_nc_curr_token.tk_name,
_nc_visbuf(_nc_curr_token.tk_valstring));
break;
case CANCEL:
_tracef("Token: Cancel; name='%s'",
_nc_curr_token.tk_name);
break;
case NAMES:
_tracef("Token: Names; value='%s'",
_nc_curr_token.tk_name);
break;
case EOF:
_tracef("Token: End of file");
break;
default:
_nc_warning("Bad token type");
}
}
#endif
if (dot_flag == TRUE) /* if commented out, use the next one */
type = _nc_get_token(silent);
DEBUG(3, ("token: `%s', class %d",
((_nc_curr_token.tk_name != 0)
? _nc_curr_token.tk_name
: "<null>"),
type));
return (type);
}
/*
* char
* trans_string(ptr)
*
* Reads characters using next_char() until encountering a separator, nl,
* or end-of-file. The returned value is the character which caused
* reading to stop. The following translations are done on the input:
*
* ^X goes to ctrl-X (i.e. X & 037)
* {\E,\n,\r,\b,\t,\f} go to
* {ESCAPE,newline,carriage-return,backspace,tab,formfeed}
* {\^,\\} go to {carat,backslash}
* \ddd (for ddd = up to three octal digits) goes to the character ddd
*
* \e == \E
* \0 == \200
*
*/
NCURSES_EXPORT(int)
_nc_trans_string(char *ptr, char *last)
{
int count = 0;
int number = 0;
int i, c;
chtype ch, last_ch = '\0';
bool ignored = FALSE;
bool long_warning = FALSE;
while ((ch = c = next_char()) != (chtype) 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 == EOF)
_nc_err_abort(MSG_NO_INPUTS);
if (!(is7bits(ch) && isprint(ch))) {
_nc_warning("Illegal ^ character - '%s'", unctrl(ch));
}
if (ch == '?') {
*(ptr++) = '\177';
if (_nc_tracing)
_nc_warning("Allow ^? as synonym for \\177");
} else {
if ((ch &= 037) == 0)
ch = 128;
*(ptr++) = (char) (ch);
}
} else if (ch == '\\') {
ch = c = next_char();
if (c == EOF)
_nc_err_abort(MSG_NO_INPUTS);
if (ch >= '0' && ch <= '7') {
number = ch - '0';
for (i = 0; i < 2; i++) {
ch = c = next_char();
if (c == EOF)
_nc_err_abort(MSG_NO_INPUTS);
if (c < '0' || c > '7') {
if (isdigit(c)) {
_nc_warning("Non-octal digit `%c' in \\ sequence", c);
/* allow the digit; it'll do less harm */
} else {
push_back((char) c);
break;
}
}
number = number * 8 + c - '0';
}
if (number == 0)
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;
case 'r':
*(ptr++) = '\r';
break;
case 'b':
*(ptr++) = '\010';
break;
case 's':
*(ptr++) = ' ';
break;
case 'f':
*(ptr++) = '\014';
break;
case 't':
*(ptr++) = '\t';
break;
case '\\':
*(ptr++) = '\\';
break;
case '^':
*(ptr++) = '^';
break;
case ',':
*(ptr++) = ',';
break;
case ':':
*(ptr++) = ':';
break;
case '\n':
continue;
default:
_nc_warning("Illegal character '%s' in \\ sequence",
unctrl(ch));
/* FALLTHRU */
case '|':
*(ptr++) = (char) ch;
} /* endswitch (ch) */
} /* endelse (ch < '0' || ch > '7') */
}
/* end else if (ch == '\\') */
else if (ch == '\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;
}
if (!ignored) {
if (_nc_curr_col <= 1) {
push_back((char) ch);
ch = '\n';
break;
}
last_ch = ch;
count++;
}
ignored = FALSE;
if (count > MAXCAPLEN && !long_warning) {
_nc_warning("Very long string found. Missing separator?");
long_warning = TRUE;
}
} /* end while */
*ptr = '\0';
return (ch);
}
/*
* _nc_push_token()
*
* Push a token of given type so that it will be reread by the next
* get_token() call.
*/
NCURSES_EXPORT(void)
_nc_push_token(int tokclass)
{
/*
* This implementation is kind of bogus, it will fail if we ever do more
* than one pushback at a time between get_token() calls. It relies on the
* fact that _nc_curr_token is static storage that nothing but
* _nc_get_token() touches.
*/
pushtype = tokclass;
if (pushname == 0)
pushname = typeMalloc(char, MAX_NAME_SIZE + 1);
_nc_get_type(pushname);
DEBUG(3, ("pushing token: `%s', class %d",
((_nc_curr_token.tk_name != 0)
? _nc_curr_token.tk_name
: "<null>"),
pushtype));
}
/*
* Panic mode error recovery - skip everything until a "ch" is found.
*/
NCURSES_EXPORT(void)
_nc_panic_mode(char ch)
{
int c;
for (;;) {
c = next_char();
if (c == ch)
return;
if (c == EOF)
return;
}
}
#if NO_LEAKS
NCURSES_EXPORT(void)
_nc_comp_scan_leaks(void)
{
if (pushname != 0) {
FreeAndNull(pushname);
}
}
#endif