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/*
* Copyright 2021 Regents of the University of Michigan
*
* 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.
*/
#ifndef ZMAP_UTIL_H
#define ZMAP_UTIL_H
#include <stdio.h>
#include <stdint.h>
#include <sys/time.h>
#include "types.h"
int max_int(int a, int b);
int min_int(int a, int b);
uint64_t min_uint64_t(uint64_t a, uint64_t b);
uint64_t parse_max_targets(char *max_targets, int port_count);
void enforce_range(const char *name, int v, int min, int max);
// Splits comma delimited string into char*[]. Does not handle
// escaping or complicated setups - designed to process a set
// of fields that the user wants output
void split_string(const char *in, int *len, const char ***results);
// Print a string using w length long lines, attempting to break on
// spaces
void fprintw(FILE *f, const char *s, size_t w);
// pretty print elapsed (or estimated) number of seconds
void time_string(uint32_t time, int est, char *buf, size_t len);
// pretty print quantities
void number_string(uint32_t n, char *buf, size_t len);
// Convert a string representation of a MAC address to a byte array
int parse_mac(macaddr_t *out, char *in);
int check_range(int v, int min, int max);
int file_exists(char *name);
// If running as root, drops privileges to that of user "nobody".
// Otherwise, does nothing.
int drop_privs(void);
// Set CPU affinity to a single core
int set_cpu(uint32_t core);
// The number of seconds and microseconds since the Epoch.
double now(void);
// The number of seconds and nanoseconds since an unspecified point in time.
// On supported hosts, this value is guaranteed to never decrease.
//
// According to the POSIX specification the `clock_gettime` function is part
// of the Timers option and may not be available on all implementations.
//
// On hosts where a monotonic clock is not available, this falls back
// to `gettimeofday` which was ZMap's original implementation.
double steady_now(void);
#endif /* ZMAP_UTIL_H */
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