summaryrefslogtreecommitdiffstats
path: root/third_party/heimdal/lib/libedit/src/hist.c
diff options
context:
space:
mode:
Diffstat (limited to 'third_party/heimdal/lib/libedit/src/hist.c')
-rw-r--r--third_party/heimdal/lib/libedit/src/hist.c245
1 files changed, 245 insertions, 0 deletions
diff --git a/third_party/heimdal/lib/libedit/src/hist.c b/third_party/heimdal/lib/libedit/src/hist.c
new file mode 100644
index 0000000..4f01ade
--- /dev/null
+++ b/third_party/heimdal/lib/libedit/src/hist.c
@@ -0,0 +1,245 @@
+/* $NetBSD: hist.c,v 1.30 2016/11/07 15:30:18 christos Exp $ */
+
+/*-
+ * 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. 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.
+ */
+
+#include "config.h"
+#if !defined(lint) && !defined(SCCSID)
+#if 0
+static char sccsid[] = "@(#)hist.c 8.1 (Berkeley) 6/4/93";
+#else
+__RCSID("$NetBSD: hist.c,v 1.30 2016/11/07 15:30:18 christos Exp $");
+#endif
+#endif /* not lint && not SCCSID */
+
+/*
+ * hist.c: History access functions
+ */
+#include <stdlib.h>
+#include <string.h>
+#include <vis.h>
+
+#include "el.h"
+
+/* hist_init():
+ * Initialization function.
+ */
+libedit_private int
+hist_init(EditLine *el)
+{
+
+ el->el_history.fun = NULL;
+ el->el_history.ref = NULL;
+ el->el_history.buf = el_malloc(EL_BUFSIZ * sizeof(*el->el_history.buf));
+ el->el_history.sz = EL_BUFSIZ;
+ if (el->el_history.buf == NULL)
+ return -1;
+ el->el_history.last = el->el_history.buf;
+ return 0;
+}
+
+
+/* hist_end():
+ * clean up history;
+ */
+libedit_private void
+hist_end(EditLine *el)
+{
+
+ el_free(el->el_history.buf);
+ el->el_history.buf = NULL;
+}
+
+
+/* hist_set():
+ * Set new history interface
+ */
+libedit_private int
+hist_set(EditLine *el, hist_fun_t fun, void *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.
+ */
+libedit_private el_action_t
+hist_get(EditLine *el)
+{
+ const wchar_t *hp;
+ int h;
+
+ if (el->el_history.eventno == 0) { /* if really the current line */
+ (void) wcsncpy(el->el_line.buffer, el->el_history.buf,
+ el->el_history.sz);
+ 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) wcsncpy(el->el_line.buffer, hp,
+ (size_t)(el->el_line.limit - el->el_line.buffer));
+ el->el_line.buffer[el->el_line.limit - el->el_line.buffer - 1] = '\0';
+ el->el_line.lastchar = el->el_line.buffer + wcslen(el->el_line.buffer);
+
+ if (el->el_line.lastchar > el->el_line.buffer
+ && el->el_line.lastchar[-1] == '\n')
+ el->el_line.lastchar--;
+ if (el->el_line.lastchar > el->el_line.buffer
+ && el->el_line.lastchar[-1] == ' ')
+ el->el_line.lastchar--;
+#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_command()
+ * process a history command
+ */
+libedit_private int
+hist_command(EditLine *el, int argc, const wchar_t **argv)
+{
+ const wchar_t *str;
+ int num;
+ HistEventW ev;
+
+ if (el->el_history.ref == NULL)
+ return -1;
+
+ if (argc == 1 || wcscmp(argv[1], L"list") == 0) {
+ size_t maxlen = 0;
+ char *buf = NULL;
+ int hno = 1;
+ /* List history entries */
+
+ for (str = HIST_LAST(el); str != NULL; str = HIST_PREV(el)) {
+ char *ptr =
+ ct_encode_string(str, &el->el_scratch);
+ size_t len = strlen(ptr);
+ if (len > 0 && ptr[len - 1] == '\n')
+ ptr[--len] = '\0';
+ len = len * 4 + 1;
+ if (len >= maxlen) {
+ maxlen = len + 1024;
+ char *nbuf = el_realloc(buf, maxlen);
+ if (nbuf == NULL) {
+ el_free(buf);
+ return -1;
+ }
+ buf = nbuf;
+ }
+ strvis(buf, ptr, VIS_NL);
+ (void) fprintf(el->el_outfile, "%d\t%s\n",
+ hno++, buf);
+ }
+ el_free(buf);
+ return 0;
+ }
+
+ if (argc != 3)
+ return -1;
+
+ num = (int)wcstol(argv[2], NULL, 0);
+
+ if (wcscmp(argv[1], L"size") == 0)
+ return history_w(el->el_history.ref, &ev, H_SETSIZE, num);
+
+ if (wcscmp(argv[1], L"unique") == 0)
+ return history_w(el->el_history.ref, &ev, H_SETUNIQUE, num);
+
+ return -1;
+}
+
+/* hist_enlargebuf()
+ * Enlarge history buffer to specified value. Called from el_enlargebufs().
+ * Return 0 for failure, 1 for success.
+ */
+libedit_private int
+/*ARGSUSED*/
+hist_enlargebuf(EditLine *el, size_t oldsz, size_t newsz)
+{
+ wchar_t *newbuf;
+
+ newbuf = el_realloc(el->el_history.buf, newsz * sizeof(*newbuf));
+ if (!newbuf)
+ return 0;
+
+ (void) memset(&newbuf[oldsz], '\0', (newsz - oldsz) * sizeof(*newbuf));
+
+ el->el_history.last = newbuf +
+ (el->el_history.last - el->el_history.buf);
+ el->el_history.buf = newbuf;
+ el->el_history.sz = newsz;
+
+ return 1;
+}
+
+libedit_private wchar_t *
+hist_convert(EditLine *el, int fn, void *arg)
+{
+ HistEventW ev;
+ if ((*(el)->el_history.fun)((el)->el_history.ref, &ev, fn, arg) == -1)
+ return NULL;
+ return ct_decode_string((const char *)(const void *)ev.str,
+ &el->el_scratch);
+}