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 "vct.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_vtim(ts));
#endif
}

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

        AZ(clock_gettime(CLOCK_REALTIME, &ts));
        return (ts_vtim(ts));
#else
        struct timeval tv;

        AZ(gettimeofday(&tv, NULL));
        return (tv_vtim(tv));
#endif
}

void
VTIM_format(vtim_real t, char p[VTIM_FORMAT_SIZE])
{
        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();                                 \
                tm->tm_##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)) {   \
                                tm->tm_wday = 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)) {     \
                                tm->tm_mon = 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)

static unsigned
vtim_parse_http(struct tm *tm, const char **pp)
{
        const char *p;

        AN(pp);
        p = *pp;
        if (*p == '\0')
                FAIL();

        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, mon);
                DIGIT(1, mon);
                MUSTBE('-');
                DIGIT(10, mday);
                DIGIT(1, mday);
                MUSTBE('T');
                TIMESTAMP();
        } else {
                WEEKDAY();
                assert(tm->tm_wday >= 0 && tm->tm_wday <= 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[tm->tm_wday],
                    vstrlen(more_weekday[tm->tm_wday]))) {
                        /* RFC850 -- "Sunday, 06-Nov-94 08:49:37 GMT" */
                        p += vstrlen(more_weekday[tm->tm_wday]);
                        MUSTBE(',');
                        MUSTBE(' ');
                        DIGIT(10, mday);
                        DIGIT(1, mday);
                        MUSTBE('-');
                        MONTH();
                        MUSTBE('-');
                        DIGIT(10, year);
                        DIGIT(1, year);
                        tm->tm_year += 1900;
                        if (tm->tm_year < 1969)
                                tm->tm_year += 100;
                        MUSTBE(' ');
                        TIMESTAMP();
                        MUSTBE(' ');
                        MUSTBE('G');
                        MUSTBE('M');
                        MUSTBE('T');
                } else
                        FAIL();
        }

        *pp = p;
        return (1);
}

static vtim_real
vtim_calc(struct tm *tm)
{
        vtim_real t;
        int d, leap;

        if (tm->tm_sec < 0 || tm->tm_sec > 60)  /* Leapseconds! */
                FAIL();
        if (tm->tm_min < 0 || tm->tm_min > 59)
                FAIL();
        if (tm->tm_hour < 0 || tm->tm_hour > 23)
                FAIL();
        if (tm->tm_mon < 1 || tm->tm_mon > 12)
                FAIL();
        if (tm->tm_mday < 1 || tm->tm_mday > days_in_month[tm->tm_mon - 1])
                FAIL();
        if (tm->tm_year < 1899)
                FAIL();

        leap = ((tm->tm_year) % 4) == 0 &&
            (((tm->tm_year) % 100) != 0 || ((tm->tm_year) % 400) == 0);

        if (tm->tm_mon == 2 && tm->tm_mday > 28 && !leap)
                FAIL();

        if (tm->tm_sec == 60)                   /* Ignore Leapseconds */
                tm->tm_sec--;

        t = ((tm->tm_hour * 60.) + tm->tm_min) * 60. + tm->tm_sec;

        d = (tm->tm_mday - 1) + days_before_month[tm->tm_mon - 1];

        if (tm->tm_mon > 2 && leap)
                d++;

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

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

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

        d += ((tm->tm_year - 1) / 400) - 4;     /* 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 (tm->tm_wday != -1 && (d + 6 + 7 * 10000) % 7 != tm->tm_wday)
                FAIL();

        t += d * 86400.;

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

        return (t);
}

vtim_real
VTIM_parse(const char *p)
{
        struct tm tm[1] = {{.tm_wday = -1 }};

        if (p == NULL)
                FAIL();

        while (vct_isows(*p))
                p++;

        if (!vtim_parse_http(tm, &p))
                FAIL();

        while (vct_isows(*p))
                p++;

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

        return (vtim_calc(tm));
}

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)
{
#ifdef __MACH__
        const double tol_max = 2;
#else
        const double tol_max = 1.1;
#endif
        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 (vstrcmp(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

		vinyl-cache/lib/libvinyl/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 "vct.h"
74		#include "vtim.h"
75
76		/* relax vtim parsing */
77		unsigned VTIM_postel = 0;
78
79		static const char * const weekday_name[] = {
80		"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
81		};
82
83		static const char * const more_weekday[] = {
84		"day", "day", "sday", "nesday", "rsday", "day", "urday"
85		};
86
87		static const char * const month_name[] = {
88		"Jan", "Feb", "Mar", "Apr", "May", "Jun",
89		"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
90		};
91
92		static const int days_in_month[] = {
93		31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
94		};
95
96		static const int days_before_month[] = {
97		0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334
98		};
99
100		#ifdef __MACH__
101		// http://stackoverflow.com/a/21352348
102		static uint64_t mt_base;
103		static double mt_scale;
104
105		static void
106		mach_time_init(void)
107		{
108		mach_timebase_info_data_t timebase;
109
110		mt_base = mach_absolute_time();
111
112		AZ(mach_timebase_info(&timebase));
113		mt_scale = (double)timebase.numer / (double)timebase.denom * 1e-9;
114		}
115
116		static __attribute__((constructor)) void
117		init(void)
118		{
119		mach_time_init();
120		}
121		#endif
122
123		/*
124		* On older Solaris-incarnations, gethrtime() was faster than
125		* clock_gettime(CLOCK_MONOTONIC). Our configure script prefers
126		* clock_gettime if it is consistently at least twice as fast as
127		* gethrtime(), which is the case on modern Solaris descendents.
128		*/
129
130		vtim_mono
131	2406443	VTIM_mono(void)
132		{
133		#if defined(HAVE_GETHRTIME) && defined(USE_GETHRTIME)
134		return (gethrtime() * 1e-9);
135		#else
136		struct timespec ts;
137
138	2406443	AZ(clock_gettime(CLOCK_MONOTONIC, &ts));
139	2406443	return (ts_vtim(ts));
140		#endif
141		}
142
143		vtim_real
144	955868	VTIM_real(void)
145		{
146		#ifdef HAVE_CLOCK_GETTIME
147		struct timespec ts;
148
149	955868	AZ(clock_gettime(CLOCK_REALTIME, &ts));
150	955868	return (ts_vtim(ts));
151		#else
152		struct timeval tv;
153
154		AZ(gettimeofday(&tv, NULL));
155		return (tv_vtim(tv));
156		#endif
157		}
158
159		void
160	18530588	VTIM_format(vtim_real t, char p[VTIM_FORMAT_SIZE])
161		{
162		struct tm tm;
163		time_t tt;
164
165	18530588	AN(p);
166	18530588	*p = '\0';
167
168	18530588	if (t < (vtim_real)INTMAX_MIN \|\| t > (vtim_real)INTMAX_MAX)
169	4	return;
170
171	18530584	tt = (time_t)(intmax_t)t;
172	18530584	if (gmtime_r(&tt, &tm) == NULL)
173	0	return;
174
175	18530584	AN(snprintf(p, VTIM_FORMAT_SIZE,
176		"%s, %02d %s %4d %02d:%02d:%02d GMT",
177		weekday_name[tm.tm_wday],
178		tm.tm_mday, month_name[tm.tm_mon], tm.tm_year + 1900,
179		tm.tm_hour, tm.tm_min, tm.tm_sec));
180	18530588	}
181
182		#ifdef TEST_DRIVER
183		#define FAIL() \
184		do { printf("\nFAIL <<%d>>\n", __LINE__); return (0); } while (0)
185		#else
186		#define FAIL() \
187		do { return (0); } while (0)
188		#endif
189
190		#define DIGIT(mult, fld) \
191		do { \
192		if (p < '0' \|\| p > '9') \
193		FAIL(); \
194		tm->tm_##fld += (p - '0') mult; \
195		p++; \
196		} while(0)
197
198		#define MUSTBE(chr) \
199		do { \
200		if (*p != chr) \
201		FAIL(); \
202		p++; \
203		} while(0)
204
205		#define WEEKDAY() \
206		do { \
207		int i; \
208		for (i = 0; i < 7; i++) { \
209		if (!memcmp(p, weekday_name[i], 3)) { \
210		tm->tm_wday = i; \
211		break; \
212		} \
213		} \
214		if (i == 7) \
215		FAIL(); \
216		p += 3; \
217		} while(0)
218
219
220		#define MONTH() \
221		do { \
222		int i; \
223		for (i = 0; i < 12; i++) { \
224		if (!memcmp(p, month_name[i], 3)) { \
225		tm->tm_mon = i + 1; \
226		break; \
227		} \
228		} \
229		if (i == 12) \
230		FAIL(); \
231		p += 3; \
232		} while(0)
233
234		#define TIMESTAMP() \
235		do { \
236		DIGIT(10, hour); \
237		DIGIT(1, hour); \
238		MUSTBE(':'); \
239		DIGIT(10, min); \
240		DIGIT(1, min); \
241		MUSTBE(':'); \
242		DIGIT(10, sec); \
243		DIGIT(1, sec); \
244		} while(0)
245
246		static unsigned
247	58185510	vtim_parse_http(struct tm tm, const char *pp)
248		{
249		const char *p;
250
251	58185510	AN(pp);
252	58185510	p = *pp;
253	58185510	if (*p == '\0')
254	3	FAIL();
255
256	58185507	if (p >= '0' && p <= '9') {
257		/* ISO8601 -- "1994-11-06T08:49:37" */
258	18513423	DIGIT(1000, year);
259	18513423	DIGIT(100, year);
260	18513423	DIGIT(10, year);
261	18513423	DIGIT(1, year);
262	18513423	MUSTBE('-');
263	18513381	DIGIT(10, mon);
264	18513381	DIGIT(1, mon);
265	18513381	MUSTBE('-');
266	18513381	DIGIT(10, mday);
267	18513381	DIGIT(1, mday);
268	18513381	MUSTBE('T');
269	18513381	TIMESTAMP();
270	18513381	} else {
271	158658783	WEEKDAY();
272	39672072	assert(tm->tm_wday >= 0 && tm->tm_wday <= 6);
273	39672072	if (*p == ',') {
274		/* RFC822 & RFC1123 - "Sun, 06 Nov 1994 08:49:37 GMT" */
275	18521547	p++;
276	18521547	MUSTBE(' ');
277	18521547	if (VTIM_postel && *p && p[1] == ' ')
278	12	DIGIT(1, mday);
279		else {
280	18521535	DIGIT(10, mday);
281	18521535	DIGIT(1, mday);
282		}
283	18521547	MUSTBE(' ');
284	120810651	MONTH();
285	18521544	MUSTBE(' ');
286	18521544	DIGIT(1000, year);
287	18521544	DIGIT(100, year);
288	18521544	DIGIT(10, year);
289	18521544	DIGIT(1, year);
290	18521544	MUSTBE(' ');
291	18521544	TIMESTAMP();
292	18521544	MUSTBE(' ');
293	18521544	MUSTBE('G');
294	18521541	MUSTBE('M');
295	18521541	MUSTBE('T');
296	39672066	} else if (*p == ' ') {
297		/* ANSI-C asctime() -- "Sun Nov 6 08:49:37 1994" */
298	18516663	p++;
299	120776562	MONTH();
300	18516651	MUSTBE(' ');
301	18516651	if (*p != ' ')
302	13038846	DIGIT(10, mday);
303		else
304	5477805	p++;
305	18516651	DIGIT(1, mday);
306	18516651	MUSTBE(' ');
307	18516651	TIMESTAMP();
308	18516651	MUSTBE(' ');
309	18516651	DIGIT(1000, year);
310	18516651	DIGIT(100, year);
311	18516651	DIGIT(10, year);
312	18516651	DIGIT(1, year);
313	23784375	} else if (!memcmp(p, more_weekday[tm->tm_wday],
314	2633862	vstrlen(more_weekday[tm->tm_wday]))) {
315		/* RFC850 -- "Sunday, 06-Nov-94 08:49:37 GMT" */
316	2633850	p += vstrlen(more_weekday[tm->tm_wday]);
317	2633850	MUSTBE(',');
318	2633850	MUSTBE(' ');
319	2633850	DIGIT(10, mday);
320	2633850	DIGIT(1, mday);
321	2633850	MUSTBE('-');
322	17195193	MONTH();
323	2633850	MUSTBE('-');
324	2633850	DIGIT(10, year);
325	2633850	DIGIT(1, year);
326	2633850	tm->tm_year += 1900;
327	2633850	if (tm->tm_year < 1969)
328	1815156	tm->tm_year += 100;
329	2633850	MUSTBE(' ');
330	2633850	TIMESTAMP();
331	2633850	MUSTBE(' ');
332	2633850	MUSTBE('G');
333	2633850	MUSTBE('M');
334	2633850	MUSTBE('T');
335	2633850	} else
336	12	FAIL();
337		}
338
339	58185423	*pp = p;
340	58185423	return (1);
341	58185510	}
342
343		static vtim_real
344	58185411	vtim_calc(struct tm *tm)
345		{
346		vtim_real t;
347		int d, leap;
348
349	58185411	if (tm->tm_sec < 0 \|\| tm->tm_sec > 60) /* Leapseconds! */
350	12	FAIL();
351	58185399	if (tm->tm_min < 0 \|\| tm->tm_min > 59)
352	12	FAIL();
353	58185387	if (tm->tm_hour < 0 \|\| tm->tm_hour > 23)
354	12	FAIL();
355	58185375	if (tm->tm_mon < 1 \|\| tm->tm_mon > 12)
356	12	FAIL();
357	58185363	if (tm->tm_mday < 1 \|\| tm->tm_mday > days_in_month[tm->tm_mon - 1])
358	12	FAIL();
359	58185351	if (tm->tm_year < 1899)
360	0	FAIL();
361
362	72761001	leap = ((tm->tm_year) % 4) == 0 &&
363	14575650	(((tm->tm_year) % 100) != 0 \|\| ((tm->tm_year) % 400) == 0);
364
365	58185351	if (tm->tm_mon == 2 && tm->tm_mday > 28 && !leap)
366	12	FAIL();
367
368	58185339	if (tm->tm_sec == 60) /* Ignore Leapseconds */
369	12	tm->tm_sec--;
370
371	58185339	t = ((tm->tm_hour * 60.) + tm->tm_min) * 60. + tm->tm_sec;
372
373	58185339	d = (tm->tm_mday - 1) + days_before_month[tm->tm_mon - 1];
374
375	58185339	if (tm->tm_mon > 2 && leap)
376	11790642	d++;
377
378	58185339	d += (tm->tm_year % 100) * 365; /* There are 365 days in a year */
379
380	58185339	if ((tm->tm_year % 100) > 0) /* And a leap day every four years */
381	57527655	d += (((tm->tm_year % 100) - 1) / 4);
382
383	58185339	d += ((tm->tm_year / 100) - 20) * /* Days relative to y2000 */
384		(100 * 365 + 24); /* 24 leapdays per year in a century */
385
386	58185339	d += ((tm->tm_year - 1) / 400) - 4; /* One more every 400 years */
387
388		/*
389		* Now check weekday, if we have one.
390		* 6 is because 2000-01-01 was a saturday.
391		* 10000 is to make sure the modulus argument is always positive
392		*/
393	58185339	if (tm->tm_wday != -1 && (d + 6 + 7 * 10000) % 7 != tm->tm_wday)
394	24	FAIL();
395
396	58185315	t += d * 86400.;
397
398	58185315	t += 10957. * 86400.; /* 10957 days frm UNIX epoch to y2000 */
399
400	58185315	return (t);
401	58185411	}
402
403		vtim_real
404	58185510	VTIM_parse(const char *p)
405		{
406	58185510	struct tm tm[1] = {{.tm_wday = -1 }};
407
408	58185510	if (p == NULL)
409	0	FAIL();
410
411	58185516	while (vct_isows(*p))
412	6	p++;
413
414	58185510	if (!vtim_parse_http(tm, &p))
415	87	FAIL();
416
417	58185435	while (vct_isows(*p))
418	12	p++;
419
420	58185423	if (*p != '\0')
421	12	FAIL();
422
423	58185411	return (vtim_calc(tm));
424	58185510	}
425
426		void
427	422230	VTIM_sleep(vtim_dur t)
428		{
429		struct timespec ts;
430
431	422230	ts = VTIM_timespec(t);
432
433	422230	(void)nanosleep(&ts, NULL);
434	422230	}
435
436		/*
437		* VTIM_timeval and VTIM_timespec may need variants with different signatures
438		* when vtim_real / vtim_mono typedefs are changed
439		*/
440
441		struct timeval
442	38124	VTIM_timeval(vtim_dur t)
443		{
444		struct timeval tv;
445
446	38124	AZ(isnan(t));
447	38124	tv.tv_sec = (time_t)trunc(t);
448	38124	tv.tv_usec = (int)(1e6 * (t - tv.tv_sec));
449	38124	return (tv);
450		}
451
452		struct timespec
453	491856	VTIM_timespec(vtim_dur t)
454		{
455		struct timespec tv;
456
457	491856	AZ(isnan(t));
458	491856	tv.tv_sec = (time_t)trunc(t);
459	491856	tv.tv_nsec = (int)(1e9 * (t - tv.tv_sec));
460	491856	return (tv);
461		}
462
463		struct timeval
464	38124	VTIM_timeval_sock(vtim_dur t)
465		{
466
467	38124	return (VTIM_timeval(isinf(t) ? 0. : vmax(t, 1e-3)));
468		}
469
470		int
471	173792	VTIM_poll_tmo(vtim_dur tmo)
472		{
473
474	173792	if (isinf(tmo))
475	9	return (-1);
476	173783	assert(!isnan(tmo));
477	173783	return (vmax_t(int, 0, ((int)(tmo * 1e3))));
478	173792	}
479
480		#ifdef TEST_DRIVER
481
482		#pragma GCC diagnostic ignored "-Wformat-y2k"
483
484		#include <stdint.h>
485
486		static void
487	12	tst(const char *s, time_t good)
488		{
489		time_t t;
490		char buf[BUFSIZ];
491
492	12	t = VTIM_parse(s);
493	12	VTIM_format(t, buf);
494	12	printf("%-30s -> %12jd -> %s\n", s, (intmax_t)t, buf);
495	12	if (t != good) {
496	0	printf("Parse error! Got: %jd should have %jd diff %jd\n",
497	0	(intmax_t)t, (intmax_t)good, (intmax_t)(t - good));
498	0	exit(4);
499		}