/* * * 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 occurred. */ 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 occurred? */ 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; }