GCOV - Varnish Cache


/*-
 * Copyright (c) 2006 Verdens Gang AS
 * Copyright (c) 2006-2011 Varnish Software AS
 * All rights reserved.
 *
 * Author: Poul-Henning Kamp <phk@phk.freebsd.dk>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
 *
 * Semi-trivial functions to handle HTTP header timestamps according to
 * RFC 2616 section 3.3.
 *
 * We must parse four different formats:
 *       000000000011111111112222222222
 *       012345678901234567890123456789
 *       ------------------------------
 *      "Sun, 06 Nov 1994 08:49:37 GMT"         RFC822 & RFC1123
 *      "Sunday, 06-Nov-94 08:49:37 GMT"        RFC850
 *      "Sun Nov  6 08:49:37 1994"              ANSI-C asctime()
 *      "1994-11-06T08:49:37"                   ISO 8601
 *
 * And always output the RFC1123 format.
 *
 * So why are these functions hand-built ?
 *
 * Because the people behind POSIX were short-sighted morons who didn't think
 * anybody would ever need to deal with timestamps in multiple different
 * timezones at the same time -- for that matter, convert timestamps to
 * broken down UTC/GMT time.
 *
 * We could, and used to, get by by smashing our TZ variable to "UTC" but
 * that ruins the LOCALE for VMODs.
 *
 */

#include "config.h"

#include <time.h>
#include <sys/time.h>

#include <math.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef __MACH__
#include <mach/mach_time.h>
#endif

#include "vdef.h"

#include "vas.h"
#include "vtim.h"

/* relax vtim parsing */
unsigned VTIM_postel = 0;

static const char * const weekday_name[] = {
        "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
};

static const char * const more_weekday[] = {
        "day", "day", "sday", "nesday", "rsday", "day", "urday"
};

static const char * const month_name[] = {
        "Jan", "Feb", "Mar", "Apr", "May", "Jun",
        "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
};

static const int days_in_month[] = {
        31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
};

static const int days_before_month[] = {
        0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334
};

#ifdef __MACH__
// http://stackoverflow.com/a/21352348
static uint64_t mt_base;
static double   mt_scale;

static void
mach_time_init(void)
{
        mach_timebase_info_data_t timebase;

        mt_base = mach_absolute_time();

        AZ(mach_timebase_info(&timebase));
        mt_scale = (double)timebase.numer / (double)timebase.denom * 1e-9;
}

static __attribute__((constructor)) void
init(void)
{
        mach_time_init();
}
#endif

/*
 * On older Solaris-incarnations, gethrtime() was faster than
 * clock_gettime(CLOCK_MONOTONIC). Our configure script prefers
 * clock_gettime if it is consistently at least twice as fast as
 * gethrtime(), which is the case on modern Solaris descendents.
 */

vtim_mono
VTIM_mono(void)
{
#if defined(HAVE_GETHRTIME) && defined(USE_GETHRTIME)
        return (gethrtime() * 1e-9);
#else
        struct timespec ts;

        AZ(clock_gettime(CLOCK_MONOTONIC, &ts));
        return (ts.tv_sec + 1e-9 * ts.tv_nsec);
#endif
}

vtim_real
VTIM_real(void)
{
#ifdef HAVE_CLOCK_GETTIME
        struct timespec ts;

        AZ(clock_gettime(CLOCK_REALTIME, &ts));
        return (ts.tv_sec + 1e-9 * ts.tv_nsec);
#else
        struct timeval tv;

        AZ(gettimeofday(&tv, NULL));
        return (tv.tv_sec + 1e-6 * tv.tv_usec);
#endif
}

void
VTIM_format(vtim_real t, char *p)
{
        struct tm tm;
        time_t tt;

        AN(p);
        *p = '\0';

        if (t < (vtim_real)INTMAX_MIN || t > (vtim_real)INTMAX_MAX)
                return;

        tt = (time_t)(intmax_t)t;
        if (gmtime_r(&tt, &tm) == NULL)
                return;

        AN(snprintf(p, VTIM_FORMAT_SIZE,
            "%s, %02d %s %4d %02d:%02d:%02d GMT",
            weekday_name[tm.tm_wday],
            tm.tm_mday, month_name[tm.tm_mon], tm.tm_year + 1900,
            tm.tm_hour, tm.tm_min, tm.tm_sec));
}

#ifdef TEST_DRIVER
#define FAIL()  \
        do { printf("\nFAIL <<%d>>\n", __LINE__); return (0); } while (0)
#else
#define FAIL()  \
        do { return (0); } while (0)
#endif

#define DIGIT(mult, fld)                                        \
        do {                                                    \
                if (*p < '0' || *p > '9')                       \
                        FAIL();                                 \
                fld += (*p - '0') * mult;                       \
                p++;                                            \
        } while(0)

#define MUSTBE(chr)                                             \
        do {                                                    \
                if (*p != chr)                                  \
                        FAIL();                                 \
                p++;                                            \
        } while(0)

#define WEEKDAY()                                               \
        do {                                                    \
                int i;                                          \
                for (i = 0; i < 7; i++) {                       \
                        if (!memcmp(p, weekday_name[i], 3)) {   \
                                weekday = i;                    \
                                break;                          \
                        }                                       \
                }                                               \
                if (i == 7)                                     \
                        FAIL();                                 \
                p += 3;                                         \
        } while(0)


#define MONTH()                                                 \
        do {                                                    \
                int i;                                          \
                for (i = 0; i < 12; i++) {                      \
                        if (!memcmp(p, month_name[i], 3)) {     \
                                month = i + 1;                  \
                                break;                          \
                        }                                       \
                }                                               \
                if (i == 12)                                    \
                        FAIL();                                 \
                p += 3;                                         \
        } while(0)

#define TIMESTAMP()                                             \
        do {                                                    \
                DIGIT(10, hour);                                \
                DIGIT(1, hour);                                 \
                MUSTBE(':');                                    \
                DIGIT(10, min);                                 \
                DIGIT(1, min);                                  \
                MUSTBE(':');                                    \
                DIGIT(10, sec);                                 \
                DIGIT(1, sec);                                  \
        } while(0)

vtim_real
VTIM_parse(const char *p)
{
        vtim_real t;
        int month = 0, year = 0, weekday = -1, mday = 0;
        int hour = 0, min = 0, sec = 0;
        int d, leap;

        if (p == NULL || *p == '\0')
                FAIL();

        while (*p == ' ')
                p++;

        if (*p >= '0' && *p <= '9') {
                /* ISO8601 -- "1994-11-06T08:49:37" */
                DIGIT(1000, year);
                DIGIT(100, year);
                DIGIT(10, year);
                DIGIT(1, year);
                MUSTBE('-');
                DIGIT(10, month);
                DIGIT(1, month);
                MUSTBE('-');
                DIGIT(10, mday);
                DIGIT(1, mday);
                MUSTBE('T');
                TIMESTAMP();
        } else {
                WEEKDAY();
                assert(weekday >= 0 && weekday <= 6);
                if (*p == ',') {
                        /* RFC822 & RFC1123 - "Sun, 06 Nov 1994 08:49:37 GMT" */
                        p++;
                        MUSTBE(' ');
                        if (VTIM_postel && *p && p[1] == ' ')
                                DIGIT(1, mday);
                        else {
                                DIGIT(10, mday);
                                DIGIT(1, mday);
                        }
                        MUSTBE(' ');
                        MONTH();
                        MUSTBE(' ');
                        DIGIT(1000, year);
                        DIGIT(100, year);
                        DIGIT(10, year);
                        DIGIT(1, year);
                        MUSTBE(' ');
                        TIMESTAMP();
                        MUSTBE(' ');
                        MUSTBE('G');
                        MUSTBE('M');
                        MUSTBE('T');
                } else if (*p == ' ') {
                        /* ANSI-C asctime() -- "Sun Nov  6 08:49:37 1994" */
                        p++;
                        MONTH();
                        MUSTBE(' ');
                        if (*p != ' ')
                                DIGIT(10, mday);
                        else
                                p++;
                        DIGIT(1, mday);
                        MUSTBE(' ');
                        TIMESTAMP();
                        MUSTBE(' ');
                        DIGIT(1000, year);
                        DIGIT(100, year);
                        DIGIT(10, year);
                        DIGIT(1, year);
                } else if (!memcmp(p, more_weekday[weekday],
                    strlen(more_weekday[weekday]))) {
                        /* RFC850 -- "Sunday, 06-Nov-94 08:49:37 GMT" */
                        p += strlen(more_weekday[weekday]);
                        MUSTBE(',');
                        MUSTBE(' ');
                        DIGIT(10, mday);
                        DIGIT(1, mday);
                        MUSTBE('-');
                        MONTH();
                        MUSTBE('-');
                        DIGIT(10, year);
                        DIGIT(1, year);
                        year += 1900;
                        if (year < 1969)
                                year += 100;
                        MUSTBE(' ');
                        TIMESTAMP();
                        MUSTBE(' ');
                        MUSTBE('G');
                        MUSTBE('M');
                        MUSTBE('T');
                } else
                        FAIL();
        }

        while (*p == ' ')
                p++;

        if (*p != '\0')
                FAIL();

        if (sec < 0 || sec > 60)        /* Leapseconds! */
                FAIL();
        if (min < 0 || min > 59)
                FAIL();
        if (hour < 0 || hour > 23)
                FAIL();
        if (month < 1 || month > 12)
                FAIL();
        if (mday < 1 || mday > days_in_month[month - 1])
                FAIL();
        if (year < 1899)
                FAIL();

        leap =
            ((year) % 4) == 0 && (((year) % 100) != 0 || ((year) % 400) == 0);

        if (month == 2 && mday > 28 && !leap)
                FAIL();

        if (sec == 60)                  /* Ignore Leapseconds */
                sec--;

        t = ((hour * 60.) + min) * 60. + sec;

        d = (mday - 1) + days_before_month[month - 1];

        if (month > 2 && leap)
                d++;

        d += (year % 100) * 365;        /* There are 365 days in a year */

        if ((year % 100) > 0)           /* And a leap day every four years */
                d += (((year % 100) - 1) / 4);

        d += ((year / 100) - 20) *      /* Days relative to y2000 */
            (100 * 365 + 24);           /* 24 leapdays per year in a century */

        d += ((year - 1) / 400) - 4;    /* And one more every 400 years */

        /*
         * Now check weekday, if we have one.
         * 6 is because 2000-01-01 was a saturday.
         * 10000 is to make sure the modulus argument is always positive
         */
        if (weekday != -1 && (d + 6 + 7 * 10000) % 7 != weekday)
                FAIL();

        t += d * 86400.;

        t += 10957. * 86400.;           /* 10957 days frm UNIX epoch to y2000 */

        return (t);
}

void
VTIM_sleep(vtim_dur t)
{
        struct timespec ts;

        ts = VTIM_timespec(t);

        (void)nanosleep(&ts, NULL);
}

/*
 * VTIM_timeval and VTIM_timespec may need variants with different signatures
 * when vtim_real / vtim_mono typedefs are changed
 */

struct timeval
VTIM_timeval(vtim_dur t)
{
        struct timeval tv;

        AZ(isnan(t));
        tv.tv_sec = (time_t)trunc(t);
        tv.tv_usec = (int)(1e6 * (t - tv.tv_sec));
        return (tv);
}

struct timespec
VTIM_timespec(vtim_dur t)
{
        struct timespec tv;

        AZ(isnan(t));
        tv.tv_sec = (time_t)trunc(t);
        tv.tv_nsec = (int)(1e9 * (t - tv.tv_sec));
        return (tv);
}

struct timeval
VTIM_timeval_sock(vtim_dur t)
{

        return (VTIM_timeval(isinf(t) ? 0. : vmax(t, 1e-3)));
}

int
VTIM_poll_tmo(vtim_dur tmo)
{

        if (isinf(tmo))
                return (-1);
        assert(!isnan(tmo));
        return (vmax_t(int, 0, ((int)(tmo * 1e3))));
}

#ifdef TEST_DRIVER

#pragma GCC diagnostic ignored "-Wformat-y2k"

#include <stdint.h>

static void
tst(const char *s, time_t good)
{
        time_t t;
        char buf[BUFSIZ];

        t = VTIM_parse(s);
        VTIM_format(t, buf);
        printf("%-30s -> %12jd -> %s\n", s, (intmax_t)t, buf);
        if (t != good) {
                printf("Parse error! Got: %jd should have %jd diff %jd\n",
                    (intmax_t)t, (intmax_t)good, (intmax_t)(t - good));
                exit(4);
        }
}

/* XXX keep as double for the time being */
static int
tst_delta_check(const char *name, double begin, double end, vtim_dur ref)
{
        const double tol_max = 1.1;
        const double tol_min = 1;

        printf("%s delta for %fs sleep: %f\n", name, ref, (end - begin));

        if ((end - begin) > tol_max * ref) {
                printf("%s delta above tolerance: ((%f - %f) = %f) > %f\n",
                    name, end, begin, (end - begin), tol_max);
                return (1);
        } else if ((end - begin) < tol_min * ref) {
                printf("%s delta below tolerance: ((%f - %f) = %f) < %f\n",
                    name, end, begin, (end - begin), tol_min);
                return (1);
        }
        return (0);
}

static void
tst_delta(void)
{
        vtim_mono m_begin, m_end;
        vtim_real r_begin, r_end;
        const vtim_dur ref = 1;
        int err = 0;

        r_begin = VTIM_real();
        m_begin = VTIM_mono();
        VTIM_sleep(ref);
        r_end = VTIM_real();
        m_end = VTIM_mono();

        err += tst_delta_check("VTIM_mono", m_begin, m_end, ref);
        err += tst_delta_check("VTIM_real", r_begin, r_end, ref);

        if (err) {
                printf("%d time delta test errors\n", err);
                exit(4);
        }
}

static void
bench(void)
{
        vtim_mono s, e;
        vtim_mono t_m;
        vtim_real t_r;
        unsigned long t_i;
        int i;
        char buf[64];

        t_m = 0;
        t_r = 0;
        s = VTIM_mono();
        for (i=0; i<100000; i++)
                t_r += VTIM_real();
        e = VTIM_mono();
        printf("real: %fs / %d = %fns - tst val %f\n",
            e - s, i, 1e9 * (e - s) / i, t_r);

        t_i = 0;
        s = VTIM_mono();
        for (i=0; i<100000; i++)
                t_m += VTIM_mono();
        e = VTIM_mono();
        printf("mono: %fs / %d = %fns - tst val %f\n",
            e - s, i, 1e9 * (e - s) / i, t_m);

        t_i = 0;
        s = VTIM_mono();
        for (i=0; i<100000; i++) {
                snprintf(buf, sizeof(buf), "%.6f", s);
                t_i += buf[4];
        }
        e = VTIM_mono();
        printf("printf %%.6f: %fs / %d = %fns - tst val %lu %s\n",
            e - s, i, 1e9 * (e - s) / i, t_i, buf);

        t_i = 0;
        s = VTIM_mono();
        for (i=0; i<100000; i++) {
                snprintf(buf, sizeof(buf), "%ju.%06ju",
                    (uintmax_t)floor(s),
                    (uintmax_t)floor((s * 1e6)) % 1000000UL);
                t_i += buf[4];
        }
        e = VTIM_mono();
        printf("printf %%ju.%%06ju: %fs / %d = %fns - tst val %lu %s\n",
            e - s, i, 1e9 * (e - s) / i, t_i, buf);
}

static void
parse_check(time_t t, const char *s)
{
        vtim_real tt;
        char buf[BUFSIZ];

        tt = VTIM_parse(s);
        if (tt != t) {
                VTIM_format(tt, buf);
                printf("  fm: %12jd <%s>\n", (intmax_t)t, s);
                printf("  to: %12.0f <%s>\n", tt, buf);
                exit(2);
        }
}

#define TTEST_MIN (sizeof(time_t) >= 8 ? -2209852800LL : INT32_MIN)
#define TTEST_MAX (sizeof(time_t) >= 8 ? 20000000000LL : INT32_MAX)

int
main(int argc, char **argv)
{
        time_t t;
        intmax_t iter;
        struct tm tm;
        char buf[BUFSIZ];
        char buf1[BUFSIZ];

        (void)argc;
        (void)argv;

        AZ(setenv("TZ", "UTC", 1));

        bench();

        /* Brute force test against libc version */
        for (iter = TTEST_MIN; iter < TTEST_MAX; iter += 3599) {
                t = (time_t)iter;
                gmtime_r(&t, &tm);
                strftime(buf1, sizeof buf1, "%a, %d %b %Y %T GMT", &tm);
                VTIM_format(t, buf);
                if (strcmp(buf, buf1)) {
                        printf("libc: <%s> Vtim <%s> %jd\n",
                            buf1, buf, (intmax_t)t);
                        exit(2);
                }
                parse_check(t, buf1);

                strftime(buf1, sizeof buf1, "%a %b %e %T %Y", &tm);
                parse_check(t, buf1);

                strftime(buf1, sizeof buf1, "%Y-%m-%dT%T", &tm);
                parse_check(t, buf1);

                if (tm.tm_year >= 69 && tm.tm_year < 169) {
                        strftime(buf1, sizeof buf1, "%A, %d-%b-%y %T GMT", &tm);
                        parse_check(t, buf1);
                }
        }

        /* Examples from RFC2616 section 3.3.1 */
        tst("Sun, 06 Nov 1994 08:49:37 GMT", 784111777);
        tst("Sunday, 06-Nov-94 08:49:37 GMT", 784111777);
        tst("Sun Nov  6 08:49:37 1994", 784111777);

        tst("1994-11-06T08:49:37", 784111777);

        tst_delta();

        return (0);
}

#endif

		varnish-cache/lib/libvarnish/vtim.c
0		/*-
1		* Copyright (c) 2006 Verdens Gang AS
2		* Copyright (c) 2006-2011 Varnish Software AS
3		* All rights reserved.
4		*
5		* Author: Poul-Henning Kamp <phk@phk.freebsd.dk>
6		*
7		* SPDX-License-Identifier: BSD-2-Clause
8		*
9		* Redistribution and use in source and binary forms, with or without
10		* modification, are permitted provided that the following conditions
11		* are met:
12		* 1. Redistributions of source code must retain the above copyright
13		* notice, this list of conditions and the following disclaimer.
14		* 2. Redistributions in binary form must reproduce the above copyright
15		* notice, this list of conditions and the following disclaimer in the
16		* documentation and/or other materials provided with the distribution.
17		*
18		* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19		* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20		* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21		* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
22		* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23		* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24		* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25		* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26		* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27		* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28		* SUCH DAMAGE.
29		*
30		* Semi-trivial functions to handle HTTP header timestamps according to
31		* RFC 2616 section 3.3.
32		*
33		* We must parse four different formats:
34		* 000000000011111111112222222222
35		* 012345678901234567890123456789
36		* ------------------------------
37		* "Sun, 06 Nov 1994 08:49:37 GMT" RFC822 & RFC1123
38		* "Sunday, 06-Nov-94 08:49:37 GMT" RFC850
39		* "Sun Nov 6 08:49:37 1994" ANSI-C asctime()
40		* "1994-11-06T08:49:37" ISO 8601
41		*
42		* And always output the RFC1123 format.
43		*
44		* So why are these functions hand-built ?
45		*
46		* Because the people behind POSIX were short-sighted morons who didn't think
47		* anybody would ever need to deal with timestamps in multiple different
48		* timezones at the same time -- for that matter, convert timestamps to
49		* broken down UTC/GMT time.
50		*
51		* We could, and used to, get by by smashing our TZ variable to "UTC" but
52		* that ruins the LOCALE for VMODs.
53		*
54		*/
55
56		#include "config.h"
57
58		#include <time.h>
59		#include <sys/time.h>
60
61		#include <math.h>
62		#include <stdint.h>
63		#include <stdio.h>
64		#include <stdlib.h>
65		#include <string.h>
66		#ifdef __MACH__
67		#include <mach/mach_time.h>
68		#endif
69
70		#include "vdef.h"
71
72		#include "vas.h"
73		#include "vtim.h"
74
75		/* relax vtim parsing */
76		unsigned VTIM_postel = 0;
77
78		static const char * const weekday_name[] = {
79		"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
80		};
81
82		static const char * const more_weekday[] = {
83		"day", "day", "sday", "nesday", "rsday", "day", "urday"
84		};
85
86		static const char * const month_name[] = {
87		"Jan", "Feb", "Mar", "Apr", "May", "Jun",
88		"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
89		};
90
91		static const int days_in_month[] = {
92		31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
93		};
94
95		static const int days_before_month[] = {
96		0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334
97		};
98
99		#ifdef __MACH__
100		// http://stackoverflow.com/a/21352348
101		static uint64_t mt_base;
102		static double mt_scale;
103
104		static void
105		mach_time_init(void)
106		{
107		mach_timebase_info_data_t timebase;
108
109		mt_base = mach_absolute_time();
110
111		AZ(mach_timebase_info(&timebase));
112		mt_scale = (double)timebase.numer / (double)timebase.denom * 1e-9;
113		}
114
115		static __attribute__((constructor)) void
116		init(void)
117		{
118		mach_time_init();
119		}
120		#endif
121
122		/*
123		* On older Solaris-incarnations, gethrtime() was faster than
124		* clock_gettime(CLOCK_MONOTONIC). Our configure script prefers
125		* clock_gettime if it is consistently at least twice as fast as
126		* gethrtime(), which is the case on modern Solaris descendents.
127		*/
128
129		vtim_mono
130	743978	VTIM_mono(void)
131		{
132		#if defined(HAVE_GETHRTIME) && defined(USE_GETHRTIME)
133		return (gethrtime() * 1e-9);
134		#else
135		struct timespec ts;
136
137	743978	AZ(clock_gettime(CLOCK_MONOTONIC, &ts));
138	743978	return (ts.tv_sec + 1e-9 * ts.tv_nsec);
139		#endif
140		}
141
142		vtim_real
143	278746	VTIM_real(void)
144		{
145		#ifdef HAVE_CLOCK_GETTIME
146		struct timespec ts;
147
148	278746	AZ(clock_gettime(CLOCK_REALTIME, &ts));
149	278746	return (ts.tv_sec + 1e-9 * ts.tv_nsec);
150		#else
151		struct timeval tv;
152
153		AZ(gettimeofday(&tv, NULL));
154		return (tv.tv_sec + 1e-6 * tv.tv_usec);
155		#endif
156		}
157
158		void
159	6176701	VTIM_format(vtim_real t, char *p)
160		{
161		struct tm tm;
162		time_t tt;
163
164	6176701	AN(p);
165	6176701	*p = '\0';
166
167	6176701	if (t < (vtim_real)INTMAX_MIN \|\| t > (vtim_real)INTMAX_MAX)
168	1	return;
169
170	6176700	tt = (time_t)(intmax_t)t;
171	6176700	if (gmtime_r(&tt, &tm) == NULL)
172	0	return;
173
174	6176700	AN(snprintf(p, VTIM_FORMAT_SIZE,
175		"%s, %02d %s %4d %02d:%02d:%02d GMT",
176		weekday_name[tm.tm_wday],
177		tm.tm_mday, month_name[tm.tm_mon], tm.tm_year + 1900,
178		tm.tm_hour, tm.tm_min, tm.tm_sec));
179	6176701	}
180
181		#ifdef TEST_DRIVER
182		#define FAIL() \
183		do { printf("\nFAIL <<%d>>\n", __LINE__); return (0); } while (0)
184		#else
185		#define FAIL() \
186		do { return (0); } while (0)
187		#endif
188
189		#define DIGIT(mult, fld) \
190		do { \
191		if (p < '0' \|\| p > '9') \
192		FAIL(); \
193		fld += (p - '0') mult; \
194		p++; \
195		} while(0)
196
197		#define MUSTBE(chr) \
198		do { \
199		if (*p != chr) \
200		FAIL(); \
201		p++; \
202		} while(0)
203
204		#define WEEKDAY() \
205		do { \
206		int i; \
207		for (i = 0; i < 7; i++) { \
208		if (!memcmp(p, weekday_name[i], 3)) { \
209		weekday = i; \
210		break; \
211		} \
212		} \
213		if (i == 7) \
214		FAIL(); \
215		p += 3; \
216		} while(0)
217
218
219		#define MONTH() \
220		do { \
221		int i; \
222		for (i = 0; i < 12; i++) { \
223		if (!memcmp(p, month_name[i], 3)) { \
224		month = i + 1; \
225		break; \
226		} \
227		} \
228		if (i == 12) \
229		FAIL(); \
230		p += 3; \
231		} while(0)
232
233		#define TIMESTAMP() \
234		do { \
235		DIGIT(10, hour); \
236		DIGIT(1, hour); \
237		MUSTBE(':'); \
238		DIGIT(10, min); \
239		DIGIT(1, min); \
240		MUSTBE(':'); \
241		DIGIT(10, sec); \
242		DIGIT(1, sec); \
243		} while(0)
244
245		vtim_real
246	19394893	VTIM_parse(const char *p)
247		{
248		vtim_real t;
249	19394893	int month = 0, year = 0, weekday = -1, mday = 0;
250	19394893	int hour = 0, min = 0, sec = 0;
251		int d, leap;
252
253	19394893	if (p == NULL \|\| *p == '\0')
254	1	FAIL();
255
256	19394894	while (*p == ' ')
257	2	p++;
258
259	19394892	if (p >= '0' && p <= '9') {
260		/* ISO8601 -- "1994-11-06T08:49:37" */
261	6171141	DIGIT(1000, year);
262	6171141	DIGIT(100, year);
263	6171141	DIGIT(10, year);
264	6171141	DIGIT(1, year);
265	6171141	MUSTBE('-');
266	6171127	DIGIT(10, month);
267	6171127	DIGIT(1, month);
268	6171127	MUSTBE('-');
269	6171127	DIGIT(10, mday);
270	6171127	DIGIT(1, mday);
271	6171127	MUSTBE('T');
272	6171127	TIMESTAMP();
273	6171127	} else {
274	52885738	WEEKDAY();
275	13223747	assert(weekday >= 0 && weekday <= 6);
276	13223747	if (*p == ',') {
277		/* RFC822 & RFC1123 - "Sun, 06 Nov 1994 08:49:37 GMT" */
278	6173702	p++;
279	6173702	MUSTBE(' ');
280	6173702	if (VTIM_postel && *p && p[1] == ' ')
281	4	DIGIT(1, mday);
282		else {
283	6173698	DIGIT(10, mday);
284	6173698	DIGIT(1, mday);
285		}
286	6173702	MUSTBE(' ');
287	40263484	MONTH();
288	6173701	MUSTBE(' ');
289	6173701	DIGIT(1000, year);
290	6173701	DIGIT(100, year);
291	6173701	DIGIT(10, year);
292	6173701	DIGIT(1, year);
293	6173701	MUSTBE(' ');
294	6173701	TIMESTAMP();
295	6173701	MUSTBE(' ');
296	6173701	MUSTBE('G');
297	6173700	MUSTBE('M');
298	6173700	MUSTBE('T');
299	13223745	} else if (*p == ' ') {
300		/* ANSI-C asctime() -- "Sun Nov 6 08:49:37 1994" */
301	6172156	p++;
302	40258139	MONTH();
303	6172152	MUSTBE(' ');
304	6172152	if (*p != ' ')
305	4346282	DIGIT(10, mday);
306		else
307	1825870	p++;
308	6172152	DIGIT(1, mday);
309	6172152	MUSTBE(' ');
310	6172152	TIMESTAMP();
311	6172152	MUSTBE(' ');
312	6172152	DIGIT(1000, year);
313	6172152	DIGIT(100, year);
314	6172152	DIGIT(10, year);
315	6172152	DIGIT(1, year);
316	7927930	} else if (!memcmp(p, more_weekday[weekday],
317	877889	strlen(more_weekday[weekday]))) {
318		/* RFC850 -- "Sunday, 06-Nov-94 08:49:37 GMT" */
319	877885	p += strlen(more_weekday[weekday]);
320	877885	MUSTBE(',');
321	877885	MUSTBE(' ');
322	877885	DIGIT(10, mday);
323	877885	DIGIT(1, mday);
324	877885	MUSTBE('-');
325	5731016	MONTH();
326	877885	MUSTBE('-');
327	877885	DIGIT(10, year);
328	877885	DIGIT(1, year);
329	877885	year += 1900;
330	877885	if (year < 1969)
331	605052	year += 100;
332	877885	MUSTBE(' ');
333	877885	TIMESTAMP();
334	877885	MUSTBE(' ');
335	877885	MUSTBE('G');
336	877885	MUSTBE('M');
337	877885	MUSTBE('T');
338	877885	} else
339	4	FAIL();
340		}
341
342	19394868	while (*p == ' ')
343	4	p++;
344
345	19394864	if (*p != '\0')
346	4	FAIL();
347
348	19394860	if (sec < 0 \|\| sec > 60) /* Leapseconds! */
349	4	FAIL();
350	19394856	if (min < 0 \|\| min > 59)
351	4	FAIL();
352	19394852	if (hour < 0 \|\| hour > 23)
353	4	FAIL();
354	19394848	if (month < 1 \|\| month > 12)
355	4	FAIL();
356	19394844	if (mday < 1 \|\| mday > days_in_month[month - 1])
357	4	FAIL();
358	19394840	if (year < 1899)
359	0	FAIL();
360
361	19394840	leap =
362	24253390	((year) % 4) == 0 && (((year) % 100) != 0 \|\| ((year) % 400) == 0);
363
364	19394840	if (month == 2 && mday > 28 && !leap)
365	4	FAIL();
366
367	19394836	if (sec == 60) /* Ignore Leapseconds */
368	4	sec--;
369
370	19394836	t = ((hour * 60.) + min) * 60. + sec;
371
372	19394836	d = (mday - 1) + days_before_month[month - 1];
373
374	19394836	if (month > 2 && leap)
375	3930214	d++;
376
377	19394836	d += (year % 100) * 365; /* There are 365 days in a year */
378
379	19394836	if ((year % 100) > 0) /* And a leap day every four years */
380	19175608	d += (((year % 100) - 1) / 4);
381
382	19394836	d += ((year / 100) - 20) * /* Days relative to y2000 */
383		(100 * 365 + 24); /* 24 leapdays per year in a century */
384
385	19394836	d += ((year - 1) / 400) - 4; /* And one more every 400 years */
386
387		/*
388		* Now check weekday, if we have one.
389		* 6 is because 2000-01-01 was a saturday.
390		* 10000 is to make sure the modulus argument is always positive
391		*/
392	19394836	if (weekday != -1 && (d + 6 + 7 * 10000) % 7 != weekday)
393	8	FAIL();
394
395	19394828	t += d * 86400.;
396
397	19394828	t += 10957. * 86400.; /* 10957 days frm UNIX epoch to y2000 */
398
399	19394828	return (t);
400	19394893	}
401
402		void
403	107391	VTIM_sleep(vtim_dur t)
404		{
405		struct timespec ts;
406
407	107391	ts = VTIM_timespec(t);
408
409	107391	(void)nanosleep(&ts, NULL);
410	107391	}
411
412		/*
413		* VTIM_timeval and VTIM_timespec may need variants with different signatures
414		* when vtim_real / vtim_mono typedefs are changed
415		*/
416
417		struct timeval
418	9020	VTIM_timeval(vtim_dur t)
419		{
420		struct timeval tv;
421
422	9020	AZ(isnan(t));
423	9020	tv.tv_sec = (time_t)trunc(t);
424	9020	tv.tv_usec = (int)(1e6 * (t - tv.tv_sec));
425	9020	return (tv);
426		}
427
428		struct timespec
429	127128	VTIM_timespec(vtim_dur t)
430		{
431		struct timespec tv;
432
433	127128	AZ(isnan(t));
434	127128	tv.tv_sec = (time_t)trunc(t);
435	127128	tv.tv_nsec = (int)(1e9 * (t - tv.tv_sec));
436	127128	return (tv);
437		}
438
439		struct timeval
440	9020	VTIM_timeval_sock(vtim_dur t)
441		{
442
443	9020	return (VTIM_timeval(isinf(t) ? 0. : vmax(t, 1e-3)));
444		}
445
446		int
447	54796	VTIM_poll_tmo(vtim_dur tmo)
448		{
449
450	54796	if (isinf(tmo))
451	3	return (-1);
452	54793	assert(!isnan(tmo));
453	54793	return (vmax_t(int, 0, ((int)(tmo * 1e3))));
454	54796	}
455
456		#ifdef TEST_DRIVER
457
458		#pragma GCC diagnostic ignored "-Wformat-y2k"
459
460		#include <stdint.h>
461
462		static void
463	4	tst(const char *s, time_t good)
464		{
465		time_t t;
466		char buf[BUFSIZ];
467
468	4	t = VTIM_parse(s);
469	4	VTIM_format(t, buf);
470	4	printf("%-30s -> %12jd -> %s\n", s, (intmax_t)t, buf);
471	4	if (t != good) {
472	0	printf("Parse error! Got: %jd should have %jd diff %jd\n",
473	0	(intmax_t)t, (intmax_t)good, (intmax_t)(t - good));
474	0	exit(4);
475		}
476	4	}
477
478		/* XXX keep as double for the time being */
479		static int
480	2	tst_delta_check(const char *name, double begin, double end, vtim_dur ref)
481		{
482	2	const double tol_max = 1.1;
483	2	const double tol_min = 1;
484
485	2	printf("%s delta for %fs sleep: %f\n", name, ref, (end - begin));
486
487	2	if ((end - begin) > tol_max * ref) {
488	0	printf("%s delta above tolerance: ((%f - %f) = %f) > %f\n",
489	0	name, end, begin, (end - begin), tol_max);
490	0	return (1);
491	2	} else if ((end - begin) < tol_min * ref) {
492	0	printf("%s delta below tolerance: ((%f - %f) = %f) < %f\n",
493	0	name, end, begin, (end - begin), tol_min);
494	0	return (1);
495		}
496	2	return (0);
497	2	}
498
499		static void