| /* |
| * 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; |
| } |