util/m5/src/args.c

/*
 * Copyright (c) 2011, 2017 ARM Limited
 * All rights reserved
 *
 * The license below extends only to copyright in the software and shall
 * not be construed as granting a license to any other intellectual
 * property including but not limited to intellectual property relating
 * to a hardware implementation of the functionality of the software
 * licensed hereunder.  You may use the software subject to the license
 * terms below provided that you ensure that this notice is replicated
 * unmodified and in its entirety in all distributions of the software,
 * modified or unmodified, in source code or in binary form.
 *
 * Copyright (c) 2003-2005 The Regents of The University of Michigan
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met: redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer;
 * 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;
 * neither the name of the copyright holders nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT
 * OWNER 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.
 */

#include <inttypes.h>
#include <stdlib.h>
#include <string.h>

int
parse_int_args(int argc, char *argv[], uint64_t ints[], int len)
{
    if (argc > len)
        return 0;

// On 32 bit platforms we need to use strtoull to do the conversion
#ifdef __LP64__
#define strto64 strtoul
#else
#define strto64 strtoull
#endif
    int i;
    for (i = 0; i < len; ++i)
        ints[i] = (i < argc) ? strto64(argv[i], NULL, 0) : 0;

#undef strto64
    return 1;
}

int
pack_str_into_regs(const char *str, uint64_t regs[], int num_regs)
{
    const size_t RegSize = sizeof(regs[0]);
    const size_t MaxLen = num_regs * RegSize;

    size_t len = strlen(str);

    if (len > MaxLen)
        return 0;

    memset(regs, 0, MaxLen);

    while (len) {
        for (int offset = 0; offset < RegSize && len; offset++, len--) {
            int shift = offset * 8;
            *regs |= (uint64_t)(uint8_t)*str++ << shift;
        }
        regs++;
    }
    return 1;
}