BSD 4.4 Lite Lib Sources

1 files changed, 170 insertions, 0 deletions

diff --git a/lib/libedit/hist.c b/lib/libedit/hist.c
new file mode 100644
index 0000000..394df63
--- /dev/null
+++ b/lib/libedit/hist.c
@@ -0,0 +1,170 @@
+/*-
+ * Copyright (c) 1992, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Christos Zoulas of Cornell University.
+ *
+ * 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.
+ */
+
+#if !defined(lint) && !defined(SCCSID)
+static char sccsid[] = "@(#)hist.c	8.1 (Berkeley) 6/4/93";
+#endif /* not lint && not SCCSID */
+
+/*
+ * hist.c: History access functions
+ */
+#include "sys.h"
+#include <stdlib.h>
+#include "el.h"
+
+/* hist_init():
+ *	Initialization function.
+ */
+protected int
+hist_init(el)
+    EditLine *el;
+{
+    el->el_history.fun  = NULL;
+    el->el_history.ref  = NULL;
+    el->el_history.buf   = (char *) el_malloc(EL_BUFSIZ);
+    el->el_history.last  = el->el_history.buf;
+    return 0;
+}
+
+
+/* hist_end():
+ *	clean up history;
+ */
+protected void
+hist_end(el)
+    EditLine *el;
+{
+    el_free((ptr_t) el->el_history.buf);
+    el->el_history.buf   = NULL;
+}
+
+
+/* hist_set():
+ *	Set new history interface
+ */
+protected int
+hist_set(el, fun, ptr)
+    EditLine *el;
+    hist_fun_t fun;
+    ptr_t ptr;
+
+{
+    el->el_history.ref = ptr;
+    el->el_history.fun = fun;
+    return 0;
+}
+
+
+/* hist_get():
+ *	Get a history line and update it in the buffer.
+ *	eventno tells us the event to get.
+ */
+protected el_action_t
+hist_get(el)
+    EditLine *el;
+{
+    const char    *hp;
+    int     h;
+
+    if (el->el_history.eventno == 0) {	/* if really the current line */
+	(void) strncpy(el->el_line.buffer, el->el_history.buf, EL_BUFSIZ);
+	el->el_line.lastchar = el->el_line.buffer + 
+		(el->el_history.last - el->el_history.buf);
+
+#ifdef KSHVI
+    if (el->el_map.type == MAP_VI)
+	el->el_line.cursor = el->el_line.buffer;
+    else
+#endif /* KSHVI */
+	el->el_line.cursor = el->el_line.lastchar;
+
+	return CC_REFRESH;
+    }
+
+    if (el->el_history.ref == NULL)
+	return CC_ERROR;
+
+    hp = HIST_FIRST(el);
+
+    if (hp == NULL)
+	return CC_ERROR;
+
+    for (h = 1; h < el->el_history.eventno; h++)
+	if ((hp = HIST_NEXT(el)) == NULL) {
+	    el->el_history.eventno = h;
+	    return CC_ERROR;
+	}
+
+    (void) strncpy(el->el_line.buffer, hp, EL_BUFSIZ);
+    el->el_line.lastchar = el->el_line.buffer + strlen(el->el_line.buffer);
+
+    if (el->el_line.lastchar > el->el_line.buffer) {
+	if (el->el_line.lastchar[-1] == '\n')
+	    el->el_line.lastchar--;
+	if (el->el_line.lastchar[-1] == ' ')
+	    el->el_line.lastchar--;
+	if (el->el_line.lastchar < el->el_line.buffer)
+	    el->el_line.lastchar = el->el_line.buffer;
+    }
+
+#ifdef KSHVI
+    if (el->el_map.type == MAP_VI)
+	el->el_line.cursor = el->el_line.buffer;
+    else
+#endif /* KSHVI */
+	el->el_line.cursor = el->el_line.lastchar;
+
+    return CC_REFRESH;
+}
+
+/* hist_list()
+ *	List history entries
+ */
+protected int
+/*ARGSUSED*/
+hist_list(el, argc, argv)
+    EditLine *el;
+    int argc;
+    char **argv;
+{
+    const char *str;
+
+    if (el->el_history.ref == NULL)
+	return -1;
+    for (str = HIST_LAST(el); str != NULL; str = HIST_PREV(el))
+	(void) fprintf(el->el_outfile, "%d %s", el->el_history.ev->num, str);
+    return 0;
+}