Author: stepan
Date: 2008-08-19 19:48:02 +0200 (Tue, 19 Aug 2008)
New Revision: 3523
Added:
trunk/payloads/libpayload/libc/readline.c
Log:
* add readline()
* add fatal()
Signed-off-by: Stefan Reinauer <[EMAIL PROTECTED]>
Signed-off-by: Patrick Georgi <[EMAIL PROTECTED]>
Acked-by: Jordan Crouse <[EMAIL PROTECTED]>
Added: trunk/payloads/libpayload/libc/readline.c
===================================================================
--- trunk/payloads/libpayload/libc/readline.c (rev 0)
+++ trunk/payloads/libpayload/libc/readline.c 2008-08-19 17:48:02 UTC (rev
3523)
@@ -0,0 +1,150 @@
+/*
+ * This file is part of the libpayload project.
+ *
+ * Copyright (C) 2008 coresystems GmbH
+ *
+ * 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. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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 <libpayload.h>
+
+static char * readline_buffer;
+static int readline_bufferlen;
+
+/**
+ * This readline implementation is rather simple, but it does more than the
+ * original readline() because it allows us to have a pre-filled buffer. To
+ * pre-fill the buffer, use the getline() function.
+ */
+char * readline(const char * prompt)
+{
+ char *buffer;
+ int current, ch, nonspace_seen;
+
+ if (!readline_buffer || !readline_bufferlen) {
+#define READLINE_BUFFERSIZE 256
+ readline_buffer = malloc(READLINE_BUFFERSIZE);
+ readline_bufferlen = READLINE_BUFFERSIZE;
+ memset(readline_buffer, 0, readline_bufferlen);
+ }
+
+ buffer = readline_buffer;
+
+ /* print prompt */
+ if (prompt) {
+ current = 0;
+ while (prompt[current]) {
+ putchar(prompt[current]);
+ current++;
+ }
+ }
+
+ /* print existing buffer, if there is one */
+ current = 0;
+ while (buffer[current]) {
+ putchar(buffer[current]);
+ current++;
+ }
+
+ while (1) {
+ ch = getchar();
+ switch (ch) {
+ case '\r':
+ case '\n':
+ /* newline */
+ putchar('\n');
+ goto out;
+ case '\b':
+ case '\x7f':
+ /* backspace */
+ if (current > 0) {
+ putchar('\b');
+ putchar(' ');
+ putchar('\b');
+ current--;
+ }
+ break;
+ case 'W' & 0x1f: /* CTRL-W */
+ /* word erase */
+ nonspace_seen = 0;
+ while (current) {
+ if (buffer[current - 1] != ' ')
+ nonspace_seen = 1;
+ putchar('\b');
+ putchar(' ');
+ putchar('\b');
+ current--;
+ if (nonspace_seen && (current <
readline_bufferlen - 1)
+ && (current > 0) && (buffer[current - 1] ==
' '))
+ break;
+ }
+ break;
+ case 'U' & 0x1f: /* CTRL-U */
+ /* line erase */
+ while (current) {
+ putchar('\b');
+ putchar(' ');
+ putchar('\b');
+ current--;
+ }
+ current = 0;
+ break;
+ default:
+ /* all other characters */
+
+ /* ignore control characters */
+ if (ch < 0x20)
+ break;
+
+ /* ignore unprintables */
+ if (ch >= 0x7f)
+ break;
+
+ if (current + 1 < readline_bufferlen) {
+ /* print new character */
+ putchar(ch);
+ /* and add it to the array */
+ buffer[current] = ch;
+ current++;
+ }
+ }
+ }
+
+
+out:
+ if (current >= readline_bufferlen)
+ current = readline_bufferlen - 1;
+ buffer[current] = '\0';
+
+ return buffer;
+}
+
+int getline(char *buffer, int len)
+{
+ readline_buffer = buffer;
+ readline_bufferlen = len;
+ readline(NULL);
+ return strlen(buffer);
+}
+
--
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