BSD 4.4 Lite Lib Sources

1 files changed, 208 insertions, 0 deletions

diff --git a/lib/libterm/termcap.c b/lib/libterm/termcap.c
new file mode 100644
index 0000000..708ccfa
--- /dev/null
+++ b/lib/libterm/termcap.c
@@ -0,0 +1,208 @@
+/*
+ * Copyright (c) 1980, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)termcap.c	8.1 (Berkeley) 6/4/93";
+#endif /* not lint */
+
+#define	PBUFSIZ		512	/* max length of filename path */
+#define	PVECSIZ		32	/* max number of names in path */
+
+#include <stdio.h>
+#include <ctype.h>
+#include <stdlib.h>
+#include <string.h>
+#include "pathnames.h"
+
+/*
+ * termcap - routines for dealing with the terminal capability data base
+ *
+ * BUG:		Should use a "last" pointer in tbuf, so that searching
+ *		for capabilities alphabetically would not be a n**2/2
+ *		process when large numbers of capabilities are given.
+ * Note:	If we add a last pointer now we will screw up the
+ *		tc capability. We really should compile termcap.
+ *
+ * Essentially all the work here is scanning and decoding escapes
+ * in string capabilities.  We don't use stdio because the editor
+ * doesn't, and because living w/o it is not hard.
+ */
+
+static	char *tbuf;	/* termcap buffer */
+
+/*
+ * Get an entry for terminal name in buffer bp from the termcap file.
+ */
+int
+tgetent(bp, name)
+	char *bp, *name;
+{
+	register char *p;
+	register char *cp;
+	char  *dummy;
+	char **fname;
+	char  *home;
+	int    i;
+	char   pathbuf[PBUFSIZ];	/* holds raw path of filenames */
+	char  *pathvec[PVECSIZ];	/* to point to names in pathbuf */
+	char **pvec;			/* holds usable tail of path vector */
+	char  *termpath;
+
+	fname = pathvec;
+	pvec = pathvec;
+	tbuf = bp;
+	p = pathbuf;
+	cp = getenv("TERMCAP");
+	/*
+	 * TERMCAP can have one of two things in it. It can be the
+	 * name of a file to use instead of /etc/termcap. In this
+	 * case it better start with a "/". Or it can be an entry to
+	 * use so we don't have to read the file. In this case it
+	 * has to already have the newlines crunched out.  If TERMCAP
+	 * does not hold a file name then a path of names is searched
+	 * instead.  The path is found in the TERMPATH variable, or
+	 * becomes "$HOME/.termcap /etc/termcap" if no TERMPATH exists.
+	 */
+	if (!cp || *cp != '/') {	/* no TERMCAP or it holds an entry */
+		if (termpath = getenv("TERMPATH"))
+			strncpy(pathbuf, termpath, PBUFSIZ);
+		else {
+			if (home = getenv("HOME")) {	/* set up default */
+				p += strlen(home);	/* path, looking in */
+				strcpy(pathbuf, home);	/* $HOME first */
+				*p++ = '/';
+			}	/* if no $HOME look in current directory */
+			strncpy(p, _PATH_DEF, PBUFSIZ - (p - pathbuf));
+		}
+	}
+	else				/* user-defined name in TERMCAP */
+		strncpy(pathbuf, cp, PBUFSIZ);	/* still can be tokenized */
+
+	*fname++ = pathbuf;	/* tokenize path into vector of names */
+	while (*++p)
+		if (*p == ' ' || *p == ':') {
+			*p = '\0';
+			while (*++p)
+				if (*p != ' ' && *p != ':')
+					break;
+			if (*p == '\0')
+				break;
+			*fname++ = p;
+			if (fname >= pathvec + PVECSIZ) {
+				fname--;
+				break;
+			}
+		}
+	*fname = (char *) 0;			/* mark end of vector */
+	if (cp && *cp && *cp != '/')
+		if (cgetset(cp) < 0)
+			return(-2);
+
+	i = cgetent(&dummy, pathvec, name);      
+	
+	if (i == 0)
+		strcpy(bp, dummy);
+	
+	if (dummy)
+		free(dummy);
+	/* no tc reference loop return code in libterm XXX */
+	if (i == -3)
+		return(-1);
+	return(i + 1);
+}
+
+/*
+ * Return the (numeric) option id.
+ * Numeric options look like
+ *	li#80
+ * i.e. the option string is separated from the numeric value by
+ * a # character.  If the option is not found we return -1.
+ * Note that we handle octal numbers beginning with 0.
+ */
+int
+tgetnum(id)
+	char *id;
+{
+	long num;
+
+	if (cgetnum(tbuf, id, &num) == 0)
+		return(num);
+	else
+		return(-1);
+}
+
+/*
+ * Handle a flag option.
+ * Flag options are given "naked", i.e. followed by a : or the end
+ * of the buffer.  Return 1 if we find the option, or 0 if it is
+ * not given.
+ */
+int
+tgetflag(id)
+	char *id;
+{
+	return(cgetcap(tbuf, id, ':') != NULL);
+}
+
+/*
+ * Get a string valued option.
+ * These are given as
+ *	cl=^Z
+ * Much decoding is done on the strings, and the strings are
+ * placed in area, which is a ref parameter which is updated.
+ * No checking on area overflow.
+ */
+char *
+tgetstr(id, area)
+	char *id, **area;
+{
+	char ids[3];
+	char *s;
+	int i;
+	
+	/*
+	 * XXX
+	 * This is for all the boneheaded programs that relied on tgetstr
+	 * to look only at the first 2 characters of the string passed...
+	 */
+	*ids = *id;
+	ids[1] = id[1];
+	ids[2] = '\0';
+
+	if ((i = cgetstr(tbuf, ids, &s)) < 0)
+		return NULL;
+	
+	strcpy(*area, s);
+	*area += i + 1;
+	return(s);
+}