--- /dev/null
+/*
+ * Copyright (C) 2013 Intel Corporation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <ctype.h>
+
+#include "history.h"
+
+/*
+ * Very simple history storage for easy usage of tool
+ */
+
+#define HISTORY_DEPTH 20
+#define LINE_SIZE 100
+static char lines[HISTORY_DEPTH][LINE_SIZE];
+static int last_line = 0;
+static int history_size = 0;
+
+/* TODO: Storing history not implemented yet */
+void history_store(const char *filename)
+{
+}
+
+/* Restoring history from file */
+void history_restore(const char *filename)
+{
+ char line[1000];
+ FILE *f = fopen(filename, "rt");
+
+ if (f == NULL)
+ return;
+
+ for (;;) {
+ if (fgets(line, 1000, f) != NULL) {
+ int l = strlen(line);
+ while (l > 0 && isspace(line[--l]))
+ line[l] = 0;
+ if (l > 0)
+ history_add_line(line);
+ } else
+ break;
+ }
+ fclose(f);
+}
+
+/* Add new line to history buffer */
+void history_add_line(const char *line)
+{
+ if (line == NULL || strlen(line) == 0)
+ return;
+
+ if (strcmp(line, lines[last_line]) == 0)
+ return;
+
+ last_line = (last_line + 1) % HISTORY_DEPTH;
+ strncpy(&lines[last_line][0], line, LINE_SIZE - 1);
+ if (history_size < HISTORY_DEPTH)
+ history_size++;
+}
+
+/*
+ * Get n-th line from history
+ * 0 - means latest
+ * -1 - means oldest
+ * return -1 if there is no such line
+ */
+int history_get_line(int n, char *buf, int buf_size)
+{
+ if (n == -1)
+ n = history_size - 1;
+
+ if (n >= history_size || buf_size == 0 || n < 0)
+ return -1;
+
+ strncpy(buf,
+ &lines[(HISTORY_DEPTH + last_line - n) % HISTORY_DEPTH][0],
+ buf_size - 1);
+ buf[buf_size - 1] = 0;
+
+ return n;
+}
--- /dev/null
+/*
+ * Copyright (C) 2013 Intel Corporation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+void history_store(const char *filename);
+void history_restore(const char *filename);
+void history_add_line(const char *line);
+int history_get_line(int n, char *buf, int buf_size);
#include <termios.h>
#include "terminal.h"
+#include "history.h"
/*
* Character sequences recognized by code in this file
/* current length of input line */
static int line_len = 0;
+/* line index used for fetching lines from history */
+static int line_index = 0;
+
/*
* Moves cursor to right or left
*
}
/*
+ * Call this when text in line_buf was changed
+ * and line needs to be redrawn
+ */
+static void terminal_line_replaced(void)
+{
+ int len = strlen(line_buf);
+
+ /* line is shorter that previous */
+ if (len < line_len) {
+ /* if new line is shorter move cursor to end of new end */
+ while (line_buf_ix > len) {
+ putchar('\b');
+ line_buf_ix--;
+ }
+ /* If cursor was not at the end, move it to the end */
+ if (line_buf_ix < line_len)
+ printf("%.*s", line_len - line_buf_ix,
+ line_buf + line_buf_ix);
+ /* over write end of previous line */
+ while (line_len >= len++)
+ putchar(' ');
+ }
+ /* draw new line */
+ printf("\r>%s", line_buf);
+ /* set up indexes to new line */
+ line_len = strlen(line_buf);
+ line_buf_ix = line_len;
+}
+
+/*
+ * Function tries to replace current line with specified line in history
+ * new_line_index - new line to show, -1 to show oldest
+ */
+static void terminal_get_line_from_history(int new_line_index)
+{
+ new_line_index = history_get_line(new_line_index,
+ line_buf, LINE_BUF_MAX);
+
+ if (new_line_index >= 0) {
+ terminal_line_replaced();
+ line_index = new_line_index;
+ }
+}
+
+/*
+ * Function searches history back or forward for command line that starts
+ * with characters up to cursor position
+ *
+ * back - true - searches backward
+ * back - false - searches forward (more recent commands)
+ */
+static void terminal_match_hitory(bool back)
+{
+ char buf[line_buf_ix + 1];
+ int line;
+ int matching_line = -1;
+ int dir = back ? 1 : -1;
+
+ line = line_index + dir;
+ while (matching_line == -1 && line >= 0) {
+ int new_line_index;
+
+ new_line_index = history_get_line(line, buf, line_buf_ix + 1);
+ if (new_line_index < 0)
+ break;
+
+ if (0 == strncmp(line_buf, buf, line_buf_ix))
+ matching_line = line;
+ line += dir;
+ }
+
+ if (matching_line >= 0) {
+ int pos = line_buf_ix;
+ terminal_get_line_from_history(matching_line);
+ /* move back to cursor position to origianl place */
+ line_buf_ix = pos;
+ terminal_move_cursor(pos - line_len);
+ }
+}
+
+/*
* Converts terminal character sequences to single value representing
* keyboard keys
*/
printf("%.*s", (int) (line_buf_ix - old_pos),
line_buf + old_pos);
break;
+ case KEY_SUP:
+ terminal_get_line_from_history(-1);
+ break;
+ case KEY_SDOWN:
+ if (line_index > 0)
+ terminal_get_line_from_history(0);
+ break;
case KEY_UP:
+ terminal_get_line_from_history(line_index + 1);
+ break;
case KEY_DOWN:
+ if (line_index > 0)
+ terminal_get_line_from_history(line_index - 1);
break;
case '\n':
case '\r':
+ /*
+ * On new line add line to history
+ * forget history position
+ */
+ history_add_line(line_buf);
line_len = 0;
line_buf_ix = 0;
+ line_index = -1;
/* print new line */
putchar(c);
process_line(line_buf);
case KEY_MDOWN:
case KEY_STAB:
case KEY_M_n:
+ /* Search history forward */
+ terminal_match_hitory(false);
+ break;
case KEY_M_p:
+ /* Search history backward */
+ terminal_match_hitory(true);
break;
default:
if (!isprint(c)) {
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