BSD 4.4 Lite Usr.bin Sources

1 files changed, 151 insertions, 0 deletions

diff --git a/usr.bin/ctags/yacc.c b/usr.bin/ctags/yacc.c
new file mode 100644
index 0000000..c013283
--- /dev/null
+++ b/usr.bin/ctags/yacc.c
@@ -0,0 +1,151 @@
+/*
+ * Copyright (c) 1987, 1993, 1994
+ *	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[] = "@(#)yacc.c	8.3 (Berkeley) 4/2/94";
+#endif /* not lint */
+
+#include <ctype.h>
+#include <limits.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "ctags.h"
+
+/*
+ * y_entries:
+ *	find the yacc tags and put them in.
+ */
+void
+y_entries()
+{
+	int	c;
+	char	*sp;
+	bool	in_rule;
+	char	tok[MAXTOKEN];
+
+	in_rule = NO;
+
+	while (GETC(!=, EOF))
+		switch (c) {
+		case '\n':
+			SETLINE;
+			/* FALLTHROUGH */
+		case ' ':
+		case '\f':
+		case '\r':
+		case '\t':
+			break;
+		case '{':
+			if (skip_key('}'))
+				in_rule = NO;
+			break;
+		case '\'':
+		case '"':
+			if (skip_key(c))
+				in_rule = NO;
+			break;
+		case '%':
+			if (GETC(==, '%'))
+				return;
+			(void)ungetc(c, inf);
+			break;
+		case '/':
+			if (GETC(==, '*'))
+				skip_comment();
+			else
+				(void)ungetc(c, inf);
+			break;
+		case '|':
+		case ';':
+			in_rule = NO;
+			break;
+		default:
+			if (in_rule || !isalpha(c) && c != '.' && c != '_')
+				break;
+			sp = tok;
+			*sp++ = c;
+			while (GETC(!=, EOF) && (intoken(c) || c == '.'))
+				*sp++ = c;
+			*sp = EOS;
+			getline();		/* may change before ':' */
+			while (iswhite(c)) {
+				if (c == '\n')
+					SETLINE;
+				if (GETC(==, EOF))
+					return;
+			}
+			if (c == ':') {
+				pfnote(tok, lineno);
+				in_rule = YES;
+			}
+			else
+				(void)ungetc(c, inf);
+		}
+}
+
+/*
+ * toss_yysec --
+ *	throw away lines up to the next "\n%%\n"
+ */
+void
+toss_yysec()
+{
+	int	c;			/* read character */
+	int	state;
+
+	/*
+	 * state == 0 : waiting
+	 * state == 1 : received a newline
+	 * state == 2 : received first %
+	 * state == 3 : recieved second %
+	 */
+	lineftell = ftell(inf);
+	for (state = 0; GETC(!=, EOF);)
+		switch (c) {
+		case '\n':
+			++lineno;
+			lineftell = ftell(inf);
+			if (state == 3)		/* done! */
+				return;
+			state = 1;		/* start over */
+			break;
+		case '%':
+			if (state)		/* if 1 or 2 */
+				++state;	/* goto 3 */
+			break;
+		default:
+			state = 0;		/* reset */
+			break;
+		}
+}