util.c

/* Copyright 2015 Google Inc. All Rights Reserved.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#include <stdlib.h>
#include "util.h"

int parse_mem_arg(const char *str, size_t *result)
{
        size_t r;
        char *p;

        r = strtoull(str, &p, 0);
        switch (*p) {
        case 'k': case 'K': r *= 1024; ++p; break;
        case 'm': case 'M': r *= 1024*1024; ++p; break;
        case 'g': case 'G': r *= 1024*1024*1024; ++p; break;
        }
        if (*p) {
                return -1;
        }
        *result = r;
        return 0;
}