Fix memory bounds error

[proxmark3-svn] / client / util_posix.c

//-----------------------------------------------------------------------------
// Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
//
// This code is licensed to you under the terms of the GNU GPL, version 2 or,
// at your option, any later version. See the LICENSE.txt file for the text of
// the license.
//-----------------------------------------------------------------------------
// utilities requiring Posix library functions
//-----------------------------------------------------------------------------

#if !defined(_WIN32)
#define _POSIX_C_SOURCE 199309L                 // need nanosleep()
#else
#include <windows.h>
#endif

#include "util_posix.h"
#include <stdint.h>
#include <time.h>


// Timer functions
#if !defined (_WIN32)
#include <errno.h>

static void nsleep(uint64_t n) {
        struct timespec timeout;
        timeout.tv_sec = n/1000000000;
        timeout.tv_nsec = n%1000000000;
        while (nanosleep(&timeout, &timeout) && errno == EINTR);
}

void msleep(uint32_t n) {
        nsleep(1000000 * (uint64_t)n);
}
#endif // _WIN32

#ifdef __APPLE__

        #define CLOCK_MONOTONIC (1)
        #define CLOCK_REALTIME (2)

        #include <sys/time.h>
        #include <mach/clock.h>
        #include <mach/mach.h>
        #include <mach/mach_time.h>

        /* clock_gettime is not implemented on OSX prior to 10.12 */
        int _civet_clock_gettime(int clk_id, struct timespec *t);

        int _civet_clock_gettime(int clk_id, struct timespec *t)
        {
                memset(t, 0, sizeof(*t));
                if (clk_id == CLOCK_REALTIME) {
                        struct timeval now;
                        int rv = gettimeofday(&now, NULL);
                        if (rv) {
                                return rv;
                        }
                        t->tv_sec = now.tv_sec;
                        t->tv_nsec = now.tv_usec * 1000;
                        return 0;

                } else if (clk_id == CLOCK_MONOTONIC) {
                        static uint64_t clock_start_time = 0;
                        static mach_timebase_info_data_t timebase_info = {0, 0};

                        uint64_t now = mach_absolute_time();

                        if (clock_start_time == 0) {
                                mach_timebase_info(&timebase_info);
                                clock_start_time = now;
                        }

                        now = (uint64_t)((double)(now - clock_start_time)
                                         * (double)timebase_info.numer
                                         / (double)timebase_info.denom);

                        t->tv_sec = now / 1000000000;
                        t->tv_nsec = now % 1000000000;
                        return 0;
                }
                return -1; // EINVAL - Clock ID is unknown
        }

        /* if clock_gettime is declared, then __CLOCK_AVAILABILITY will be defined */
        #ifdef __CLOCK_AVAILABILITY
                /* If we compiled with Mac OSX 10.12 or later, then clock_gettime will be declared
                 * but it may be NULL at runtime. So we need to check before using it. */
                int _civet_safe_clock_gettime(int clk_id, struct timespec *t);

                int _civet_safe_clock_gettime(int clk_id, struct timespec *t) {
                        if( clock_gettime ) {
                                return clock_gettime(clk_id, t);
                        }
                        return _civet_clock_gettime(clk_id, t);
                }
                #define clock_gettime _civet_safe_clock_gettime
        #else
                #define clock_gettime _civet_clock_gettime
        #endif

#endif


// a milliseconds timer for performance measurement
uint64_t msclock() {
#if defined(_WIN32)
        #include <sys/types.h>

        // WORKAROUND FOR MinGW (some versions - use if normal code does not compile)
        // It has no _ftime_s and needs explicit inclusion of timeb.h
        #include <sys/timeb.h>
        struct _timeb t;
        _ftime(&t);
        return 1000 * t.time + t.millitm;

// NORMAL CODE (use _ftime_s)
        //struct _timeb t;
        //if (_ftime_s(&t)) {
        //      return 0;
        //} else {
        //      return 1000 * t.time + t.millitm;
        //}
#else
        struct timespec t;
        clock_gettime(CLOCK_MONOTONIC, &t);
        return (t.tv_sec * 1000 + t.tv_nsec / 1000000);
#endif
}