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authorPeter Wemm <peter@FreeBSD.org>1999-08-24 01:06:48 +0000
committerPeter Wemm <peter@FreeBSD.org>1999-08-24 01:06:48 +0000
commit0e3d540892016a47f6a68ec9ba2879d35ce5f7c2 (patch)
treead214c5b2c8142ad6dc6d2ce3a9c83e6317d7f77 /contrib/ncurses/ncurses/tinfo/comp_scan.c
downloadsrc-0e3d540892016a47f6a68ec9ba2879d35ce5f7c2.tar.gz
src-0e3d540892016a47f6a68ec9ba2879d35ce5f7c2.zip
Import unmodified (but trimmed) ncurses 5.0 prerelease 990821.vendor/ncurses/5.0-19990821
This contains the full eti (panel, form, menu) extensions. bmake glue to follow. Obtained from: ftp://ftp.clark.net/pub/dickey/ncurses
Notes
Notes: svn path=/vendor/ncurses/dist/; revision=50276 svn path=/vendor/ncurses/5.0-19990821/; revision=50278; tag=vendor/ncurses/5.0-19990821
Diffstat (limited to 'contrib/ncurses/ncurses/tinfo/comp_scan.c')
-rw-r--r--contrib/ncurses/ncurses/tinfo/comp_scan.c756
1 files changed, 756 insertions, 0 deletions
diff --git a/contrib/ncurses/ncurses/tinfo/comp_scan.c b/contrib/ncurses/ncurses/tinfo/comp_scan.c
new file mode 100644
index 000000000000..152930885ab7
--- /dev/null
+++ b/contrib/ncurses/ncurses/tinfo/comp_scan.c
@@ -0,0 +1,756 @@
+/****************************************************************************
+ * 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: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
+ * and: Eric S. Raymond <esr@snark.thyrsus.com> *
+ ****************************************************************************/
+
+/*
+ * 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 <tic.h>
+
+MODULE_ID("$Id: comp_scan.c,v 1.34 1998/11/01 00:56:39 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')
+
+int _nc_syntax; /* termcap or terminfo? */
+long _nc_curr_file_pos; /* file offset of current line */
+long _nc_comment_start; /* start of comment range before name */
+long _nc_comment_end; /* end of comment range before name */
+long _nc_start_line; /* start line of current entry */
+
+/*****************************************************************************
+ *
+ * Token-grabbing machinery
+ *
+ *****************************************************************************/
+
+static bool first_column; /* See 'next_char()' below */
+static char separator; /* capability separator */
+static int pushtype; /* type of pushback token */
+static char pushname[MAX_NAME_SIZE+1];
+
+static int last_char(void);
+static int next_char(void);
+static long stream_pos(void);
+static bool end_of_stream(void);
+static void push_back(char c);
+
+/* Assume we may be looking at a termcap-style continuation */
+static inline int eat_escaped_newline(int ch)
+{
+ if (ch == '\\')
+ while ((ch = next_char()) == '\n' || iswhite(ch))
+ continue;
+ return ch;
+}
+
+/*
+ * 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.
+ *
+ */
+
+int _nc_get_token(void)
+{
+static const char terminfo_punct[] = "@%&*!#";
+long number;
+int type;
+int ch;
+char * numchk;
+char numbuf[80];
+unsigned found;
+static char buffer[MAX_ENTRY_SIZE];
+char *ptr;
+int dot_flag = FALSE;
+long token_start;
+
+ if (pushtype != NO_PUSHBACK)
+ {
+ int retval = pushtype;
+
+ _nc_set_type(pushname);
+ DEBUG(3, ("pushed-back token: `%s', class %d",
+ _nc_curr_token.tk_name, pushtype));
+
+ pushtype = NO_PUSHBACK;
+ pushname[0] = '\0';
+
+ /* currtok wasn't altered by _nc_push_token() */
+ return(retval);
+ }
+
+ if (end_of_stream())
+ return(EOF);
+
+start_token:
+ token_start = stream_pos();
+ while ((ch = next_char()) == '\n' || iswhite(ch))
+ continue;
+
+ ch = eat_escaped_newline(ch);
+
+ if (ch == EOF)
+ type = EOF;
+ else {
+ /* if this is a termcap entry, skip a leading separator */
+ if (separator == ':' && ch == ':')
+ ch = next_char();
+
+ if (ch == '.') {
+ 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(ch) && !strchr(terminfo_punct, (char)ch)) {
+ _nc_warning("Illegal character (expected alphanumeric or %s) - %s",
+ terminfo_punct, _tracechar((chtype)ch));
+ _nc_panic_mode(separator);
+ goto start_token;
+ }
+
+ ptr = buffer;
+ *(ptr++) = ch;
+
+ if (first_column) {
+ char *desc;
+
+ _nc_comment_start = token_start;
+ _nc_comment_end = _nc_curr_file_pos;
+ _nc_start_line = _nc_curr_line;
+
+ _nc_syntax = ERR;
+ while ((ch = next_char()) != '\n')
+ {
+ if (ch == EOF)
+ _nc_err_abort("premature EOF");
+ else if (ch == ':' && last_char() != ',')
+ {
+ _nc_syntax = SYN_TERMCAP;
+ separator = ':';
+ break;
+ }
+ else if (ch == ',')
+ {
+ _nc_syntax = SYN_TERMINFO;
+ separator = ',';
+ /*
+ * Fall-through here is not an accident.
+ * The idea is that if we see a comma, we
+ * figure this is terminfo unless we
+ * subsequently run into a colon -- but
+ * we don't stop looking for that colon until
+ * hitting a newline. This allows commas to
+ * be embedded in description fields of
+ * either syntax.
+ */
+ /* FALLTHRU */
+ }
+ else
+ ch = eat_escaped_newline(ch);
+
+ *ptr++ = ch;
+ }
+ ptr[0] = '\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 (--ptr; iswhite(*ptr) || *ptr == ','; ptr--)
+ continue;
+ ptr[1] = '\0';
+ }
+
+ /*
+ * This is the soonest we have the terminal name
+ * fetched. Set up for following warning messages.
+ */
+ ptr = strchr(buffer, '|');
+ if (ptr == (char *)NULL)
+ ptr = buffer + strlen(buffer);
+ ch = *ptr;
+ *ptr = '\0';
+ _nc_set_type(buffer);
+ *ptr = ch;
+
+ /*
+ * Compute the boundary between the aliases and the
+ * description field for syntax-checking purposes.
+ */
+ desc = strrchr(buffer, '|');
+ if (desc) {
+ if (*desc == '\0')
+ _nc_warning("empty longname field");
+ else if (strchr(desc, ' ') == (char *)NULL)
+ _nc_warning("older tic versions may treat the description field as an alias");
+ }
+ if (!desc)
+ desc = buffer + strlen(buffer);
+
+ /*
+ * 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 (ptr = buffer; ptr < desc; ptr++)
+ {
+ if (isspace(*ptr))
+ {
+ _nc_warning("whitespace in name or alias field");
+ break;
+ }
+ else if (*ptr == '/')
+ {
+ _nc_warning("slashes aren't allowed in names or aliases");
+ break;
+ }
+ else if (strchr("$[]!*?", *ptr))
+ {
+ _nc_warning("dubious character `%c' in name or alias field", *ptr);
+ break;
+ }
+ }
+
+ ptr = buffer;
+
+ _nc_curr_token.tk_name = buffer;
+ type = NAMES;
+ } else {
+ while ((ch = next_char()) != EOF) {
+ if (!isalnum(ch)) {
+ if (_nc_syntax == SYN_TERMINFO) {
+ if (ch != '_')
+ break;
+ } else { /* allow ';' for "k;" */
+ if (ch != ';')
+ break;
+ }
+ }
+ *(ptr++) = ch;
+ }
+
+ *ptr++ = '\0';
+ switch (ch) {
+ case ',':
+ case ':':
+ if (ch != separator)
+ _nc_err_abort("Separator inconsistent with syntax");
+ _nc_curr_token.tk_name = buffer;
+ type = BOOLEAN;
+ break;
+ case '@':
+ if ((ch = next_char()) != separator)
+ _nc_warning("Missing separator after `%s', have %s",
+ buffer, _tracechar((chtype)ch));
+ _nc_curr_token.tk_name = buffer;
+ type = CANCEL;
+ break;
+
+ case '#':
+ found = 0;
+ while (isalnum(ch = next_char())) {
+ numbuf[found++] = ch;
+ if (found >= sizeof(numbuf)-1)
+ break;
+ }
+ numbuf[found] = '\0';
+ number = strtol(numbuf, &numchk, 0);
+ if (numchk == numbuf)
+ _nc_warning("no value given for `%s'", buffer);
+ if ((*numchk != '\0') || (ch != separator))
+ _nc_warning("Missing separator");
+ _nc_curr_token.tk_name = buffer;
+ _nc_curr_token.tk_valnumber = number;
+ type = NUMBER;
+ break;
+
+ case '=':
+ ch = _nc_trans_string(ptr);
+ if (ch != separator)
+ _nc_warning("Missing separator");
+ _nc_curr_token.tk_name = buffer;
+ _nc_curr_token.tk_valstring = ptr;
+ type = STRING;
+ break;
+
+ case EOF:
+ type = EOF;
+ break;
+ default:
+ /* just to get rid of the compiler warning */
+ type = UNDEF;
+ _nc_warning("Illegal character - %s",
+ _tracechar((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 & TRACE_IEVENT)
+ {
+ fprintf(stderr, "Token: ");
+ switch (type)
+ {
+ case BOOLEAN:
+ fprintf(stderr, "Boolean; name='%s'\n",
+ _nc_curr_token.tk_name);
+ break;
+
+ case NUMBER:
+ fprintf(stderr, "Number; name='%s', value=%d\n",
+ _nc_curr_token.tk_name,
+ _nc_curr_token.tk_valnumber);
+ break;
+
+ case STRING:
+ fprintf(stderr, "String; name='%s', value=%s\n",
+ _nc_curr_token.tk_name,
+ _nc_visbuf(_nc_curr_token.tk_valstring));
+ break;
+
+ case CANCEL:
+ fprintf(stderr, "Cancel; name='%s'\n",
+ _nc_curr_token.tk_name);
+ break;
+
+ case NAMES:
+
+ fprintf(stderr, "Names; value='%s'\n",
+ _nc_curr_token.tk_name);
+ break;
+
+ case EOF:
+ fprintf(stderr, "End of file\n");
+ break;
+
+ default:
+ _nc_warning("Bad token type");
+ }
+ }
+#endif
+
+ if (dot_flag == TRUE) /* if commented out, use the next one */
+ type = _nc_get_token();
+
+ DEBUG(3, ("token: `%s', class %d", _nc_curr_token.tk_name, 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
+ *
+ */
+
+char
+_nc_trans_string(char *ptr)
+{
+int count = 0;
+int number;
+int i, c;
+chtype ch, last_ch = '\0';
+bool ignored = FALSE;
+
+ while ((ch = c = next_char()) != (chtype)separator && c != EOF) {
+ if ((_nc_syntax == SYN_TERMCAP) && c == '\n')
+ break;
+ if (ch == '^' && last_ch != '%') {
+ ch = c = next_char();
+ if (c == EOF)
+ _nc_err_abort("Premature EOF");
+
+ if (! (is7bits(ch) && isprint(ch))) {
+ _nc_warning("Illegal ^ character - %s",
+ _tracechar((unsigned char)ch));
+ }
+ if (ch == '?') {
+ *(ptr++) = '\177';
+ } else {
+ if ((ch &= 037) == 0)
+ ch = 128;
+ *(ptr++) = (char)(ch);
+ }
+ }
+ else if (ch == '\\') {
+ ch = c = next_char();
+ if (c == EOF)
+ _nc_err_abort("Premature EOF");
+
+ if (ch >= '0' && ch <= '7') {
+ number = ch - '0';
+ for (i=0; i < 2; i++) {
+ ch = c = next_char();
+ if (c == EOF)
+ _nc_err_abort("Premature EOF");
+
+ 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",
+ _tracechar((unsigned char)ch));
+ *(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 */
+ ignored = TRUE;
+ } else {
+ *(ptr++) = (char)ch;
+ }
+
+ if (!ignored) {
+ last_ch = ch;
+ count ++;
+ }
+ ignored = FALSE;
+
+ if (count > MAXCAPLEN)
+ _nc_warning("Very long string found. Missing separator?");
+ } /* 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.
+ */
+
+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 curr_tok is static storage that nothing
+ * but get_token() touches.
+ */
+ pushtype = tokclass;
+ _nc_get_type(pushname);
+
+ DEBUG(3, ("pushing token: `%s', class %d",
+ _nc_curr_token.tk_name, pushtype));
+}
+
+/*
+ * Panic mode error recovery - skip everything until a "ch" is found.
+ */
+void _nc_panic_mode(char ch)
+{
+ int c;
+
+ for (;;) {
+ c = next_char();
+ if (c == ch)
+ return;
+ if (c == EOF)
+ return;
+ }
+}
+
+/*****************************************************************************
+ *
+ * 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.
+ */
+
+void _nc_reset_input(FILE *fp, char *buf)
+{
+ pushtype = NO_PUSHBACK;
+ 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(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)
+{
+ if (!yyin)
+ {
+ if (*bufptr == '\0')
+ return(EOF);
+ if (*bufptr == '\n') {
+ _nc_curr_line++;
+ _nc_curr_col = 0;
+ }
+ }
+ 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.
+ */
+ static char line[LEXBUFSIZ];
+ size_t len;
+
+ do {
+ _nc_curr_file_pos = ftell(yyin);
+
+ if ((bufstart = fgets(line, LEXBUFSIZ, yyin)) != NULL) {
+ _nc_curr_line++;
+ _nc_curr_col = 0;
+ }
+ bufptr = bufstart;
+ } while
+ (bufstart != NULL && line[0] == '#');
+
+ if (bufstart == NULL)
+ return (EOF);
+
+ while (iswhite(*bufptr))
+ 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') {
+ bufptr[len-2] = '\n';
+ bufptr[len-1] = '\0';
+ }
+ }
+ }
+
+ first_column = (bufptr == bufstart);
+
+ _nc_curr_col++;
+ return(*bufptr++);
+}
+
+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;
+}
+
+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);
+}
+
+/* comp_scan.c ends here */