1 files changed, 88 insertions, 0 deletions
diff --git a/payloads/libpayload/libc/args.c b/payloads/libpayload/libc/args.c
new file mode 100644
index 0000000000..8242d60bba
--- /dev/null
+++ b/payloads/libpayload/libc/args.c
@@ -0,0 +1,88 @@
+/*
+ * 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.
+ */
+
+/**
+ * @file libc/readline.c
+ * Simple readline implementation
+ */
+
+#include <libpayload.h>
+#include <getopt.h>
+
+/* We don't want to waste malloc on this, so we live with a small 
+ * fixed size array 
+ */
+char *string_argv[MAX_ARGS];
+int string_argc;
+
+/**
+ * Take a string and make char *argv[] and int argc from it.
+ *
+ * This function allows the user to use getopt on an arbitrary string.
+ *
+ * global variables valid after a successful run of string_to_args():
+ *   string_argc pointer to number of arguments
+ *   string_argv pointer to argument list.
+ *
+ * @param caller to be used as argv[0] (may be NULL to ignore)
+ * @param string to process
+ * @return 0 if no error occured.
+ */
+int string_to_args(char *caller, char *string)
+{
+	int i = 0;
+
+	if (caller)
+		string_argv[i++] = caller;
+
+	if (*string)
+		string_argv[i++] = string;
+
+	/* Terminate if the string ends */
+	while (string && *string) {
+		/* whitespace occured? */
+		if ((*string == ' ') || (*string == '\t')) {
+			/* skip all whitespace (and null it) */
+			while (*string == ' ' || *string == '\t')
+				*string++ = 0;
+			/* if our ugly static array is big enough, store
+			 * argument to string_argv[]
+			 */
+			if (i < MAX_ARGS)
+				string_argv[i++] = string;
+		}
+		string++;
+	}
+
+	/* prevent array from overflowing */
+	string_argc = (i <= MAX_ARGS) ? i : MAX_ARGS;
+
+	/* and return whether there was an overflow */
+	return (i <= MAX_ARGS) ? 0 : 1;
+}