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/*
* 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;
}
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