88 lines
2.8 KiB
C
88 lines
2.8 KiB
C
/*
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*
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* Copyright (C) 2008 coresystems GmbH
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/**
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* @file libc/readline.c
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* Simple readline implementation
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*/
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#include <libpayload.h>
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#include <getopt.h>
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/* We don't want to waste malloc on this, so we live with a small
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* fixed size array
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*/
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char *string_argv[MAX_ARGS];
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int string_argc;
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/**
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* Take a string and make char *argv[] and int argc from it.
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*
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* This function allows the user to use getopt on an arbitrary string.
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*
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* global variables valid after a successful run of string_to_args():
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* string_argc pointer to number of arguments
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* string_argv pointer to argument list.
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*
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* @param caller to be used as argv[0] (may be NULL to ignore)
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* @param string to process
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* @return 0 if no error occurred.
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*/
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int string_to_args(char *caller, char *string)
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{
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int i = 0;
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if (caller)
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string_argv[i++] = caller;
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if (*string)
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string_argv[i++] = string;
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/* Terminate if the string ends */
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while (string && *string) {
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/* whitespace occurred? */
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if ((*string == ' ') || (*string == '\t')) {
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/* skip all whitespace (and null it) */
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while (*string == ' ' || *string == '\t')
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*string++ = 0;
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/* if our ugly static array is big enough, store
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* argument to string_argv[]
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*/
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if (i < MAX_ARGS)
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string_argv[i++] = string;
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}
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string++;
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}
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/* prevent array from overflowing */
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string_argc = (i <= MAX_ARGS) ? i : MAX_ARGS;
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/* and return whether there was an overflow */
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return (i <= MAX_ARGS) ? 0 : 1;
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}
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