1 files changed, 117 insertions, 0 deletions
diff --git a/contrib/nvi/ex/ex_abbrev.c b/contrib/nvi/ex/ex_abbrev.c
new file mode 100644
index 0000000..231098c
--- /dev/null
+++ b/contrib/nvi/ex/ex_abbrev.c
@@ -0,0 +1,117 @@
+/*-
+ * Copyright (c) 1992, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ * Copyright (c) 1992, 1993, 1994, 1995, 1996
+ *	Keith Bostic.  All rights reserved.
+ *
+ * See the LICENSE file for redistribution information.
+ */
+
+#include "config.h"
+
+#ifndef lint
+static const char sccsid[] = "@(#)ex_abbrev.c	10.7 (Berkeley) 3/6/96";
+#endif /* not lint */
+
+#include <sys/types.h>
+#include <sys/queue.h>
+#include <sys/time.h>
+
+#include <bitstring.h>
+#include <ctype.h>
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "../common/common.h"
+#include "../vi/vi.h"
+
+/*
+ * ex_abbr -- :abbreviate [key replacement]
+ *	Create an abbreviation or display abbreviations.
+ *
+ * PUBLIC: int ex_abbr __P((SCR *, EXCMD *));
+ */
+int
+ex_abbr(sp, cmdp)
+	SCR *sp;
+	EXCMD *cmdp;
+{
+	CHAR_T *p;
+	size_t len;
+
+	switch (cmdp->argc) {
+	case 0:
+		if (seq_dump(sp, SEQ_ABBREV, 0) == 0)
+			msgq(sp, M_INFO, "105|No abbreviations to display");
+		return (0);
+	case 2:
+		break;
+	default:
+		abort();
+	}
+
+	/*
+	 * Check for illegal characters.
+	 *
+	 * !!!
+	 * Another fun one, historically.  See vi/v_ntext.c:txt_abbrev() for
+	 * details.  The bottom line is that all abbreviations have to end
+	 * with a "word" character, because it's the transition from word to
+	 * non-word characters that triggers the test for an abbreviation.  In
+	 * addition, because of the way the test is done, there can't be any
+	 * transitions from word to non-word character (or vice-versa) other
+	 * than between the next-to-last and last characters of the string,
+	 * and there can't be any <blank> characters.  Warn the user.
+	 */
+	if (!inword(cmdp->argv[0]->bp[cmdp->argv[0]->len - 1])) {
+		msgq(sp, M_ERR,
+		    "106|Abbreviations must end with a \"word\" character");
+			return (1);
+	}
+	for (p = cmdp->argv[0]->bp; *p != '\0'; ++p)
+		if (isblank(p[0])) {
+			msgq(sp, M_ERR,
+			    "107|Abbreviations may not contain tabs or spaces");
+			return (1);
+		}
+	if (cmdp->argv[0]->len > 2)
+		for (p = cmdp->argv[0]->bp,
+		    len = cmdp->argv[0]->len - 2; len; --len, ++p)
+			if (inword(p[0]) != inword(p[1])) {
+				msgq(sp, M_ERR,
+"108|Abbreviations may not mix word/non-word characters, except at the end");
+				return (1);
+			}
+
+	if (seq_set(sp, NULL, 0, cmdp->argv[0]->bp, cmdp->argv[0]->len,
+	    cmdp->argv[1]->bp, cmdp->argv[1]->len, SEQ_ABBREV, SEQ_USERDEF))
+		return (1);
+
+	F_SET(sp->gp, G_ABBREV);
+	return (0);
+}
+
+/*
+ * ex_unabbr -- :unabbreviate key
+ *      Delete an abbreviation.
+ *
+ * PUBLIC: int ex_unabbr __P((SCR *, EXCMD *));
+ */
+int
+ex_unabbr(sp, cmdp)
+	SCR *sp;
+        EXCMD *cmdp;
+{
+	ARGS *ap;
+
+	ap = cmdp->argv[0];
+	if (!F_ISSET(sp->gp, G_ABBREV) ||
+	    seq_delete(sp, ap->bp, ap->len, SEQ_ABBREV)) {
+		msgq_str(sp, M_ERR, ap->bp,
+		    "109|\"%s\" is not an abbreviation");
+		return (1);
+	}
+	return (0);
+}